UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-CSR CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT INVESTMENT COMPANIES 		Investment Company Act file number 811-21823 Pioneer Series Trust V (Exact name of registrant as specified in charter) 60 State Street, Boston, MA 02109 (Address of principal executive offices) (ZIP code) Terrence J. Cullen, Pioneer Investment Management, Inc., 60 State Street, Boston, MA 02109 (Name and address of agent for service) Registrant's telephone number, including area code: (617) 742-7825 Date of fiscal year end: August 31 Date of reporting period: September 1, 2015 through February 29, 2016 Form N-CSR is to be used by management investment companies to file reports with the Commission not later than 10 days after the transmission to stockholders of any report that is required to be transmitted to stockholders under Rule 30e-1 under the Investment Company Act of 1940 (17 CFR 270.30e-1). The Commission may use the information provided on Form N-CSR in its regulatory, disclosure review, inspection, and policymaking roles. A registrant is required to disclose the information specified by Form N-CSR, and the Commission will make this information public. A registrant is not required to respond to the collection of information contained in Form N-CSR unless the Form displays a currently valid Office of Management and Budget ("OMB") control number. Please direct comments concerning the accuracy of the information collection burden estimate and any suggestions for reducing the burden to Secretary, Securities and Exchange Commission, 450 Fifth Street, NW, Washington, DC 20549-0609. The OMB has reviewed this collection of information under the clearance requirements of 44 U.S.C. ss. 3507. ITEM 1. REPORTS TO STOCKHOLDERS. Pioneer Global Equity Fund -------------------------------------------------------------------------------- Semiannual Report | February 29, 2016 -------------------------------------------------------------------------------- Ticker Symbols: Class A GLOSX Class C GCSLX Class K PGEKX Class R PRGEX Class Y PGSYX [LOGO] PIONEER Investments(R) visit us: us.pioneerinvestments.com Table of Contents President's Letter 2 Portfolio Management Discussion 4 Portfolio Summary 8 Prices and Distributions 9 Performance Update 10 Comparing Ongoing Fund Expenses 15 Schedule of Investments 17 Financial Statements 24 Notes to Financial Statements 33 Approval of Investment Advisory Agreement 44 Trustees, Officers and Service Providers 49 Pioneer Global Equity Fund | Semiannual Report | 2/29/16 1 President's Letter Dear Shareowner, Over the past several years, many investors experienced positive returns across most major asset classes. However, 2015 was a tale of two markets, with favorable market conditions in the first half of the year, followed by an abrupt slowdown and increased volatility beginning in August. The global markets were challenged by significant economic cross-currents in different geographic regions and industrial sectors. While the U.S. economy gradually improved, growth slowed in China. Emerging markets struggled following a decline in commodity prices, especially oil. While lower energy prices are good for the consumer, there were ripple effects throughout the global economy. Against this backdrop, the Standard & Poor's 500 Index rose by just 1.4% in 2015, international equity markets were essentially flat, and emerging market equities fell sharply. Across U.S. fixed-income sectors, U.S. government and investment-grade corporate bonds were fairly flat for the year, while high-yield bonds, as measured by the Bank of America Merrill Lynch Master II High Yield Index, posted a -4.9% total return. Entering 2016, we see the U.S. economy growing modestly, against an overall global economic backdrop that remains fragile and points towards structurally lower growth. As always in a presidential election year, political rhetoric has the potential to impact U.S. sectors such as health care in 2016. Economies around the world in both developed and emerging markets are experiencing deep structural change. Geopolitical instability on many fronts, the rising risk of policy mistakes, and market liquidity issues all increase the possibility of sharp swings in asset values. In this environment, financial markets remain vulnerable to unusual levels of volatility. While divergences among regions and industries is an important theme, we are generally optimistic about the outlook for the U.S. economy, which we expect will see continued, positive growth led by a strengthened consumer. Throughout Pioneer's history, we have believed in the importance of active management. In periods of market volatility, we believe that the value of active management is even more compelling. Our experienced and tenured investment teams focus on identifying value across global markets using proprietary research, careful risk management, and a long-term perspective. Our ongoing goal is to produce compelling returns consistent with the stated objectives of our investment products, and with our shareowners' expectations. We believe our shareowners can benefit from the experience and tenure of our investment teams as well as the insights generated from our extensive research process. 2 Pioneer Global Equity Fund | Semiannual Report | 2/29/16 As always, and particularly during times of market uncertainty, we encourage you to work with your financial advisor to develop an overall investment plan that addresses both your short- and long-term goals, and to implement such a plan in a disciplined manner. We greatly appreciate the trust you have placed in us and look forward to continuing to serve you in the future. Sincerely, /s/ Lisa M. Jones Lisa M. Jones President and CEO Pioneer Investment Management USA Inc. February 29, 2016 Any information in this shareowner report regarding market or economic trends or the factors influencing the Fund's historical or future performance are statements of opinion as of the date of this report. These statements should not be relied upon for any other purposes. Past performance is no guarantee of future results, and there is no guarantee that market forecasts discussed will be realized. Pioneer Global Equity Fund | Semiannual Report | 2/29/16 3 Portfolio Management Discussion | 2/29/16 In the following interview, portfolio managers Marco Pirondini and David Glazer discuss the factors that influenced the performance of Pioneer Global Equity Fund during the six-month period ended February 29, 2016. Mr. Pirondini, Head of Equities, U.S., Executive Vice President and a portfolio manager at Pioneer, and Mr. Glazer, Senior Vice President and a portfolio manager at Pioneer, are responsible for the day-to-day management of the Fund. Q How did the Fund perform over the six-month period ended February 29, 2016? A Pioneer Global Equity Fund's Class A shares returned -5.75% at net asset value during the six-month period ended February 29, 2016, while the Fund's benchmarks, the Morgan Stanley Capital International (MSCI) World ND Index and the MSCI All Country World ND Index(1), returned -5.18% and -5.54%, respectively. During the same period, the average return of the 180 mutual funds in Lipper's Global Multi-Cap Core Funds category was -5.71%, and the average return of the 1,270 mutual funds in Morningstar's World Stock Funds category was -5.82%. Q How would you characterize the investment environment in the global equity markets during the six-month period ended February 29, 2016? A Global equity markets struggled to maintain any positive momentum during the past six months, ultimately posting negative returns. Whenever the market moved in a favorable direction, it seemed that a negative geopolitical or economic event would take place to counteract the positive momentum. Overall, the global economy also had difficulty remaining in growth mode. During the period, global investment markets were surprised by and reacted negatively to the Japanese government's decision to adopt negative short-term interest rates in an effort to boost the country's economy, restore business confidence, and push back against deflationary pressures. Second, the price of crude oil further collapsed, reaching levels much lower than analysts had expected and negatively affecting several areas of the equity market beyond the energy sector. In addition, the 1 The MSCI information may only be used for your internal use, may not be reproduced or redisseminated in any form and may not be used as a basis for or a component of any financial instruments or products or indices. None of the MSCI information is intended to constitute investment advice or a recommendation to make (or refrain from making) any kind of investment decision and may not be relied on as such. Historical data and analysis should not be taken as an indication or guarantee of any future performance analysis, forecast or prediction. The MSCI information is provided on an "as is" basis and the user of this information assumes the entire risk of any use made of this information. MSCI, each of its affiliates and each other person involved in or related to compiling, computing or creating any MSCI information (collectively, the "MSCI Parties") expressly disclaims all warranties (including, without limitation, any warranties of originality, accuracy, completeness, timeliness, non-infringement, merchantability and fitness for a particular purpose) with respect to this information. Without limiting any of the foregoing, in no event shall any MSCI Party have any liability for any direct, indirect, special, incidental, punitive, consequential (including, without limitation, lost profits) or any other damages. 4 Pioneer Global Equity Fund | Semiannual Report | 2/29/16 slowdown in China's economy represented a significant concern for investors, though U.S. economic steadiness provided some balance. In Europe, even though the European Central Bank continued to take a series of actions to boost the economy on the Continent, fundamental factors remained weak. Q Would you review the Fund's overall investment approach? A When picking investments for the portfolio, we examine mid- and large- capitalization stocks worldwide, including those located in the emerging markets. From there, we build a diversified* portfolio. We look for stocks that we think can provide "growth at a reasonable price," and so there is a strong value component to our analysis. We seek to invest the Fund in companies that are not only benefiting from operating efficiencies as reflected in factors such as increased market share and revenues, but that are also employing their capital efficiently. In particular, we emphasize strong free cash flow, because that provides companies with the flexibility to make share buybacks, reinvest in their businesses, make acquisitions, and raise dividends**. We also look for stocks with attractive dividend yields as well as those trading at below-market valuations. Finally, we attempt to assess not only the potential price gains for each stock, but also the stock's potential for a decline in price if circumstances become unfavorable. We prefer stocks with the highest potential upside, relative to their downside. Q Which of your investment decisions or individual portfolio holdings either aided or detracted from the Fund's performance relative to its benchmarks during the six-month period ended February 29, 2016? A During the period, stock selection results in the health care and telecommunication services sectors contributed to the Fund's relative returns, while a significant portfolio underweight to the energy sector, which was down substantially during the period, also contributed to relative performance. The Fund's allocation in the financials sector underperformed due to the damaging effects of the Japanese government's turn to negative short-term rates on the sector, and thus detracted from benchmark-relative results. Lastly, the portfolio's lack of exposure to stocks in the utilities sector, a defensive sector that investors favored during a period featuring severe short-term market volatility, detracted from the Fund's relative performance. With regard to individual holdings in the portfolio, the top performer for the Fund during the six-month period was Microsoft. Investors have come to view Microsoft as not only a successful personal computer software firm, but also as a dynamic growth company that is benefiting from strong * Diversification does not assure a profit nor protect against loss. ** Dividends are not guaranteed. Pioneer Global Equity Fund | Semiannual Report | 2/29/16 5 momentum within cloud computing. In addition, the Fund's position in health care giant Johnson & Johnson contributed positively to performance, as the market took a favorable view of the company's ample drug pipeline. In Japan, the Fund's shares of Sundrug contributed to returns as the company's strategy of purchasing small local pharmacies and then increasing their profitability has worked out well. Conversely, the Fund's positions in two Japanese banks, Mitsubishi UFJ Financial and Sumitomo Mitsui Financial, detracted from performance as the unfavorable interest-rate environment in Japan had a negative impact on both companies. We have maintained the Fund's positions in both banks, however, as we view the problematic interest-rate environment in the country as a short-term phenomenon. Also, the portfolio's holdings in the Swiss pharmaceutical firm Novartis dragged down the Fund's returns. Novartis, which has been a very successful holding for the Fund for an extended period, posted disappointing earnings amid a high valuation. We trimmed the Fund's position, but continue to have a favorable longer-term outlook for Novartis. Q Did you employ derivatives in managing the Fund during the six-month period ended February 29, 2016, and did those investments have an effect on performance? A Over the six-month period, the Fund utilized derivative securities to a limited degree, seeking to guard against negative currency effects from the portfolio's holdings in Japan. The Fund's derivative positions had no effect on performance. Q What is your outlook and how is the outlook reflected in the Fund's current positioning? A In the coming months, we believe that global economic growth will remain flat to slightly positive. In terms of the Fund's positioning, the portfolio's benchmark-relative overweights and underweights remain largely the same. Among defensive and non-cyclical sectors, we continue to emphasize health care and telecommunication services. The Fund also remains overweight in the information technology sector. Additionally, the Fund retains meaningful underweights in energy, materials, and industrials. In general, we are fine-tuning the portfolio and evaluating whether or not the Fund should own more of a particular stock if an opportunity exists. In the financials sector, for example, we are considering adding stocks of companies that we believe are attractively valued -- U.S. banks in particular. We also believe that stocks of some emerging markets companies that struggled mightily due to recent market volatility are starting to appear attractive. 6 Pioneer Global Equity Fund | Semiannual Report | 2/29/16 Overall, we believe current market valuations appear favorable, and that our focus on owning shares of companies that are in a stronger-than-average financial position should benefit Fund performance over time. Please refer to the Schedule of Investments on pages 17-23 for a full listing of fund securities. All investments are subject to risk, including the possible loss of principal. In the past several years, financial markets have experienced increased volatility, depressed valuations, decreased liquidity and heightened uncertainty. These conditions may continue, recur, worsen or spread. Investing in foreign and/or emerging markets securities involves risks relating to interest rates, currency exchange rates, economic, and political conditions. The Fund is subject to currency risk, meaning that the Fund could experience losses based on changes in the exchange rate between non-U.S. currencies and the U.S. dollar. Investments in small- and mid-sized companies may offer the potential for higher returns, but are also subject to greater short-term price fluctuations than larger, more established companies. When interest rates rise, the prices of fixed-income securities in the Fund will generally fall. Conversely, when interest rates fall, the prices of fixed-income securities in the Fund will generally rise. The Fund may use derivatives, such as options, futures, inverse floating rate obligations, swaps, and others, which can be illiquid, may disproportionately increase losses, and have a potentially large impact on Fund performance. Derivatives may have a leveraging effect on the Fund. At times, the Fund's investments may represent industries or industry sectors that are interrelated or have common risks, making it more susceptible to any economic, political, or regulatory developments or other risks affecting those industries and sectors. These risks may increase share price volatility. Before investing, consider the product's investment objectives, risks, charges and expenses. Contact your advisor or Pioneer Investments for a prospectus or summary prospectus containing this information. Read it carefully. Any information in this shareholder report regarding market or economic trends or the factors influencing the Fund's historical or future performance are statements of opinion as of the date of this report. Past performance is no guarantee of future results. Pioneer Global Equity Fund | Semiannual Report | 2/29/16 7 Portfolio Summary | 2/29/16 Sector Distribution -------------------------------------------------------------------------------- (As a percentage of long-term holdings) [THE FOLLOWING DATA WAS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL] Information Technology 21.2% Health Care 21.0% Financials 19.3% Consumer Discretionary 13.0% Consumer Staples 9.4% Industrials 7.4% Telecommunication Services 5.7% Energy 1.2% Government 0.9% Materials 0.9% Geographical Distribution -------------------------------------------------------------------------------- (As a percentage of long-term holdings) [THE FOLLOWING DATA WAS REPRESENTED AS A BAR CHART IN THE PRINTED MATERIAL] United States 55.5% Japan 15.5% United Kingdom 7.1% Switzerland 5.0% Germany 3.7% Denmark 2.1% Ireland 2.0% France 1.9% Indonesia 1.7% Jersey Channel Islands 1.2% Other (individually less than 1%) 4.3% 10 Largest Holdings -------------------------------------------------------------------------------- (As a percentage of long-term holdings)* 1. Microsoft Corp. 4.74% -------------------------------------------------------------------------------- 2. Apple, Inc. 4.15 -------------------------------------------------------------------------------- 3. Cardinal Health, Inc. 3.40 -------------------------------------------------------------------------------- 4. CVS Health Corp. 3.15 -------------------------------------------------------------------------------- 5. Johnson & Johnson 2.90 -------------------------------------------------------------------------------- 6. Roche Holding AG 2.71 -------------------------------------------------------------------------------- 7. Mitsubishi Electric Corp. 2.70 -------------------------------------------------------------------------------- 8. Allianz SE 2.57 -------------------------------------------------------------------------------- 9. JPMorgan Chase & Co. 2.34 -------------------------------------------------------------------------------- 10. Novartis AG 2.33 -------------------------------------------------------------------------------- * This list excludes temporary cash investments and derivative instruments. The portfolio is actively managed, and current holdings may be different. The holdings listed should not be considered recommendations to buy or sell any security listed. 8 Pioneer Global Equity Fund | Semiannual Report | 2/29/16 Prices and Distributions | 2/29/16 Net Asset Value per Share -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Class 2/29/16 8/31/15 -------------------------------------------------------------------------------- A 12.18 13.00 -------------------------------------------------------------------------------- C 11.95 12.72 -------------------------------------------------------------------------------- K 12.19 13.03 -------------------------------------------------------------------------------- R 12.13 12.99 -------------------------------------------------------------------------------- Y 12.21 13.06 -------------------------------------------------------------------------------- Distributions per Share: 9/1/15-2/29/16 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Net Investment Short-Term Long-Term Class Income Capital Gains Capital Gains -------------------------------------------------------------------------------- A $0.0788 $-- $-- -------------------------------------------------------------------------------- C $ -- $-- $-- -------------------------------------------------------------------------------- K $0.1450 $-- $-- -------------------------------------------------------------------------------- R $0.1293 $-- $-- -------------------------------------------------------------------------------- Y $0.1450 $-- $-- -------------------------------------------------------------------------------- The Morgan Stanley Capital International (MSCI) World ND Index is an unmanaged measure of the performance of stock markets in the developed world. The MSCI All Country World ND Index is an unmanaged, free-float-adjusted, market-capitalization-weighted index that is designed to measure the equity market performance of developed and emerging markets. The Index consists of 45 country indices comprising 24 developed and 21 emerging market country indices. Index returns are calculated monthly, assume reinvestment of dividends and, unlike Fund returns, do not reflect any fees, expenses or sales charges. It is not possible to invest directly in an index. The index defined here pertains to the "Value of $10,000 Investment" and "Value of $5 Million Investment" charts on pages 10-14. Pioneer Global Equity Fund | Semiannual Report | 2/29/16 9 Performance Update | 2/29/16 Class A Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Class A shares of Pioneer Global Equity Fund at public offering price during the periods shown, compared to that of the Morgan Stanley Capital International (MSCI) World ND Index and the MSCI All Country World ND Index. Average Annual Total Returns (As of February 29, 2016) -------------------------------------------------------------------------------- MSCI Net Public MSCI All Asset Offering World Country Value Price ND World Period (NAV) (POP) Index ND Index -------------------------------------------------------------------------------- 10 Years 3.67% 3.05% 3.82% 3.55% 5 Years 5.13 3.89 4.92 3.71 1 Year -12.11 -17.16 -11.00 -12.32 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated December 31, 2015) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 1.54% 1.30% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Global MSCI AC World MSCI World Equity Fund ND Index ND Index 2/06 $ 9,425 $10,000 $10,000 2/07 $11,027 $11,598 $11,586 2/08 $11,357 $11,869 $11,524 2/09 $ 6,128 $ 6,148 $ 6,094 2/10 $ 9,059 $ 9,721 $ 9,403 2/11 $10,517 $11,815 $11,441 2/12 $10,337 $11,639 $11,247 2/13 $11,366 $12,720 $12,450 2/14 $14,092 $15,030 $15,150 2/15 $15,368 $16,166 $16,341 2/16 $13,508 $14,174 $14,544 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. NAV results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. POP returns reflect deduction of maximum 5.75% sales charge. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The net expense ratio reflects the contractual expense limitation currently in effect through January 1, 2017, for Class A shares. There can be no assurance that Pioneer will extend the expense limitation beyond such time. Please see the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. 10 Pioneer Global Equity Fund | Semiannual Report | 2/29/16 Performance Update | 2/29/16 Class C Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Class C shares of Pioneer Global Equity Fund during the periods shown, compared to that of the Morgan Stanley Capital International (MSCI) World ND Index and the MSCI All Country World ND Index. Average Annual Total Returns (As of February 29, 2016) -------------------------------------------------------------------------------- MSCI MSCI All World Country If If ND World Period Held Redeemed Index ND Index -------------------------------------------------------------------------------- 10 Years 2.76% 2.76% 3.82% 3.55% 5 Years 4.22 4.22 4.92 3.71 1 Year -12.77 -12.77 -11.00 -12.32 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated December 31, 2015) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 2.25% 2.20% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Global MSCI AC World MSCI World Equity Fund ND Index ND Index 2/06 $10,000 $10,000 $10,000 2/07 $11,590 $11,598 $11,586 2/08 $11,837 $11,869 $11,524 2/09 $ 6,333 $ 6,148 $ 6,094 2/10 $ 9,277 $ 9,721 $ 9,403 2/11 $10,681 $11,815 $11,441 2/12 $10,392 $11,639 $11,247 2/13 $11,326 $12,720 $12,450 2/14 $13,917 $15,030 $15,150 2/15 $15,056 $16,166 $16,341 2/16 $13,133 $14,174 $14,544 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Class C shares held for less than one year are also subject to a 1% contingent deferred sales charge (CDSC). "If Held" results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The net expense ratio reflects the contractual expense limitation currently in effect through January 1, 2017, for Class C shares. There can be no assurance that Pioneer will extend the expense limitation beyond such time. Please see the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. Pioneer Global Equity Fund | Semiannual Report | 2/29/16 11 Performance Update | 2/29/16 Class K Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Class K shares of Pioneer Global Equity Fund during the periods shown, compared to that of the Morgan Stanley Capital International (MSCI) World ND Index and the MSCI All Country World ND Index. Average Annual Total Returns (As of February 29, 2016) -------------------------------------------------------------------------------- MSCI Net MSCI All Asset World Country Value ND World Period (NAV) Index ND Index -------------------------------------------------------------------------------- 10 Years 3.73% 3.82% 3.55% 5 Years 5.25 4.92 3.71 1 Year -11.66 -11.00 -12.32 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated December 31, 2015) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 0.99% 0.80% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Global MSCI AC World MSCI World Equity Fund ND Index ND Index 2/06 $10,000 $10,000 $10,000 2/07 $11,704 $11,598 $11,586 2/08 $12,054 $11,869 $11,524 2/09 $ 6,504 $ 6,148 $ 6,094 2/10 $ 9,615 $ 9,721 $ 9,403 2/11 $11,162 $11,815 $11,441 2/12 $10,971 $11,639 $11,247 2/13 $12,063 $12,720 $12,450 2/14 $14,957 $15,030 $15,150 2/15 $16,323 $16,166 $16,341 2/16 $14,420 $14,174 $14,544 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. The performance shown for Class K shares for the period prior to the commencement of operations of Class K shares on December 31, 2014, is the net asset value performance of the Fund's Class A shares, which has not been restated to reflect any differences in expenses, including Rule 12b-1 fees applicable to Class A shares. Since fees for Class A shares generally are higher than those of Class K shares, the performance of Class K shares prior to their inception would have been higher than the performance shown. For the period beginning December 31, 2014, the actual performance of Class K shares is reflected. Class K shares are not subject to sales charges and are available for limited groups of eligible investors, including institutional investors. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The net expense ratio reflects the contractual expense limitation currently in effect through January 1, 2017, for Class K shares. There can be no assurance that Pioneer will extend the expense limitation beyond such time. Please see the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. 12 Pioneer Global Equity Fund | Semiannual Report | 2/29/16 Performance Update | 2/29/16 Class R Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Class R shares of Pioneer Global Equity Fund during the periods shown, compared to that of the Morgan Stanley Capital International (MSCI) World ND Index and the MSCI All Country World ND Index. Average Annual Total Returns (As of February 29, 2016) -------------------------------------------------------------------------------- MSCI Net MSCI All Asset World Country Value ND World Period (NAV) Index ND Index -------------------------------------------------------------------------------- 10 Years 3.66% 3.82% 3.55% 5 Years 5.13 4.92 3.71 1 Year -12.13 -11.00 -12.32 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated December 31, 2015) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 1.59% 1.59% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Global MSCI AC World MSCI World Equity Fund ND Index ND Index 2/06 $10,000 $10,000 $10,000 2/07 $11,704 $11,598 $11,586 2/08 $12,054 $11,869 $11,524 2/09 $ 6,504 $ 6,148 $ 6,094 2/10 $ 9,615 $ 9,721 $ 9,403 2/11 $11,162 $11,815 $11,441 2/12 $10,971 $11,639 $11,247 2/13 $12,063 $12,720 $12,450 2/14 $14,957 $15,030 $15,150 2/15 $16,311 $16,166 $16,341 2/16 $14,332 $14,174 $14,544 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. The performance shown for Class R shares for the period prior to the commencement of operations of Class R shares on July 1, 2015, is the net asset value performance of the Fund's Class A shares, which has not been restated to reflect any differences in expenses, including Rule 12b-1 fees applicable to Class A shares. Since fees for Class A shares generally are higher than those of Class R shares, the performance of Class R shares prior to their inception would have been higher than the performance shown. For the period beginning July 1, 2015, the actual performance of Class R shares is reflected. Class R shares are not subject to sales charges and are available for limited groups of eligible investors, including institutional investors. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. Pioneer Global Equity Fund | Semiannual Report | 2/29/16 13 Performance Update | 2/29/16 Class Y Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $5 million investment made in Class Y shares of Pioneer Global Equity Fund during the periods shown, compared to that of the Morgan Stanley Capital International (MSCI) World ND Index and the MSCI All Country World ND Index. Average Annual Total Returns (As of February 29, 2016) -------------------------------------------------------------------------------- MSCI Net MSCI All Asset World Country Value ND World Period (NAV) Index ND Index -------------------------------------------------------------------------------- 10 Years 4.03% 3.82% 3.55% 5 Years 5.62 4.92 3.71 1 Year -11.71 -11.00 -12.32 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated December 31, 2015) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 1.00% 0.80% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $5 Million Investment Pioneer Global MSCI AC World MSCI World Equity Fund ND Index ND Index 2/06 $5,000,000 $5,000,000 $5,000,000 2/07 $5,852,001 $5,799,163 $5,792,902 2/08 $6,027,189 $5,934,426 $5,762,175 2/09 $3,252,059 $3,073,931 $3,047,054 2/10 $4,838,430 $4,860,405 $4,701,618 2/11 $5,647,384 $5,907,406 $5,720,665 2/12 $5,572,108 $5,819,582 $5,623,709 2/13 $6,160,755 $6,360,058 $6,225,082 2/14 $7,674,994 $7,515,056 $7,574,791 2/15 $8,407,581 $8,082,799 $8,170,729 2/16 $7,423,219 $7,087,155 $7,271,759 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Performance shown for periods prior to the inception of the Fund's Class Y shares on December 31, 2008, is the NAV performance of the Fund's Class A shares. The performance does not reflect differences in expenses, including the Rule 12b-1 fees applicable to Class A shares. Since fees for Class A shares are generally higher than those of Class Y shares, the performance for Class Y shares prior to their inception would have been higher than the performance shown. For the period beginning December 31, 2008, the actual performance of Class Y shares is reflected. Class Y shares are not subject to sales charges and are available for limited groups of eligible investors, including institutional investors. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The net expense ratio reflects the contractual expense limitation currently in effect through January 1, 2017, for Class Y shares. There can be no assurance that Pioneer will extend the expense limitation beyond such time. Please see the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. 14 Pioneer Global Equity Fund | Semiannual Report | 2/29/16 Comparing Ongoing Fund Expenses As a shareowner in the Fund, you incur two types of costs: (1) ongoing costs, including management fees, distribution and/or service (12b-1) fees, and other Fund expenses; and (2) transaction costs, including sales charges (loads) on purchase payments and redemption fees. This example is intended to help you understand your ongoing expenses (in dollars) of investing in the Fund and to compare these costs with the ongoing costs of investing in other mutual funds. The example is based on an investment of $1,000 at the beginning of the Fund's latest six-month period and held throughout the six months. Using the Tables -------------------------------------------------------------------------------- Actual Expenses The first table below provides information about actual account values and actual expenses. You may use the information in this table, together with the amount you invested, to estimate the expenses that you paid over the period as follows: (1) Divide your account value by $1,000 Example: an $8,600 account value (divided by) $1,000 = 8.6 (2) Multiply the result in (1) above by the corresponding share class's number in the third row under the heading entitled "Expenses Paid During Period" to estimate the expenses you paid on your account during this period. Expenses Paid on a $1,000 Investment in Pioneer Global Equity Fund Based on actual returns from September 1, 2015, through February 29, 2016. ---------------------------------------------------------------------------------------------------------- Share Class A C K R Y ---------------------------------------------------------------------------------------------------------- Beginning Account $1,000.00 $1,000.00 $1,000.00 $1,000.00 $1,000.00 Value on 9/1/15 ---------------------------------------------------------------------------------------------------------- Ending Account $ 942.50 $ 939.50 $ 945.80 $ 942.90 $ 945.10 Value on 2/29/16 ---------------------------------------------------------------------------------------------------------- Expenses Paid $ 6.28 $ 9.74 $ 3.87 $ 7.49 $ 3.87 During Period* ---------------------------------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized net expense ratio of 1.30%, 2.02%, 0.80%, 1.55% and 0.80% for Class A, Class C, Class K, Class R, and Class Y shares, respectively, multiplied by the average account value over the period, multiplied by 182/366 (to reflect the one-half year period). Pioneer Global Equity Fund | Semiannual Report | 2/29/16 15 Hypothetical Example for Comparison Purposes The table below provides information about hypothetical account values and hypothetical expenses based on the Fund's actual expense ratio and an assumed rate of return of 5% per year before expenses, which is not the Fund's actual return. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in the Fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds. Please note that the expenses shown in the tables are meant to highlight your ongoing costs only and do not reflect any transaction costs, such as sales charges (loads) or redemption fees that are charged at the time of the transaction. Therefore, the table below is useful in comparing ongoing costs only and will not help you determine the relative total costs of owning different funds. In addition, if these transaction costs were included, your costs would have been higher. Expenses Paid on a $1,000 Investment in Pioneer Global Equity Fund Based on a hypothetical 5% return per year before expenses, reflecting the period from September 1, 2015, through February 29, 2016. ---------------------------------------------------------------------------------------------------------- Share Class A C K R Y ---------------------------------------------------------------------------------------------------------- Beginning Account $1,000.00 $1,000.00 $1,000.00 $1,000.00 $1,000.00 Value on 9/1/15 ---------------------------------------------------------------------------------------------------------- Ending Account $1,018.40 $1,014.82 $1,020.89 $1,017.16 $1,020.89 Value on 2/29/16 ---------------------------------------------------------------------------------------------------------- Expenses Paid $ 6.52 $ 10.12 $ 4.02 $ 7.77 $ 4.02 During Period* ---------------------------------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized net expense ratio of 1.30%, 2.02%, 0.80%, 1.55% and 0.80% for Class A, Class C, Class K, Class R, and Class Y shares, respectively, multiplied by the average account value over the period, multiplied by 182/366 (to reflect the one-half year period). 16 Pioneer Global Equity Fund | Semiannual Report | 2/29/16 Schedule of Investments | 2/29/16 (unaudited) ---------------------------------------------------------------------------------------------- Shares Value ---------------------------------------------------------------------------------------------- COMMON STOCKS -- 98.0% ENERGY -- 1.2% Oil & Gas Exploration & Production -- 1.2% 98,761 Cabot Oil & Gas Corp. $ 1,988,059 ------------- Total Energy $ 1,988,059 ---------------------------------------------------------------------------------------------- MATERIALS -- 0.5% Commodity Chemicals -- 0.5% 10,702 LyondellBasell Industries NV $ 858,407 ------------- Total Materials $ 858,407 ---------------------------------------------------------------------------------------------- CAPITAL GOODS -- 3.9% Aerospace & Defense -- 0.6% 8,189 Raytheon Co. $ 1,014,208 ---------------------------------------------------------------------------------------------- Heavy Electrical Equipment -- 2.7% 438,000 Mitsubishi Electric Corp. $ 4,411,859 ---------------------------------------------------------------------------------------------- Industrial Machinery -- 0.6% 17,486 Ingersoll-Rand Plc $ 971,522 ------------- Total Capital Goods $ 6,397,589 ---------------------------------------------------------------------------------------------- TRANSPORTATION -- 3.5% Airlines -- 2.5% 43,289 American Airlines Group, Inc. $ 1,774,849 109,377 easyJet Plc 2,287,681 ------------- $ 4,062,530 ---------------------------------------------------------------------------------------------- Trucking -- 1.0% 41,313 DSV A/S $ 1,685,308 ------------- Total Transportation $ 5,747,838 ---------------------------------------------------------------------------------------------- AUTOMOBILES & COMPONENTS -- 2.1% Tires & Rubber -- 1.0% 47,000 Bridgestone Corp. $ 1,639,784 ---------------------------------------------------------------------------------------------- Automobile Manufacturers -- 1.1% 26,217 Daimler AG $ 1,801,157 ------------- Total Automobiles & Components $ 3,440,941 ---------------------------------------------------------------------------------------------- CONSUMER DURABLES & APPAREL -- 4.4% Consumer Electronics -- 1.2% 222,400 Panasonic Corp. $ 1,870,274 ---------------------------------------------------------------------------------------------- Homebuilding -- 2.3% 29,613 PulteGroup, Inc. $ 509,047 299,400 Sekisui Chemical Co., Ltd. 3,302,942 ------------- $ 3,811,989 ---------------------------------------------------------------------------------------------- Apparel, Accessories & Luxury Goods -- 0.9% 81,919 Burberry Group Plc $ 1,500,831 ------------- Total Consumer Durables & Apparel $ 7,183,094 ---------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Global Equity Fund | Semiannual Report | 2/29/16 17 Schedule of Investments | 2/29/16 (unaudited) (continued) ---------------------------------------------------------------------------------------------- Shares Value ---------------------------------------------------------------------------------------------- CONSUMER SERVICES -- 2.5% Hotels, Resorts & Cruise Lines -- 1.4% 59,125 InterContinental Hotels Group Plc $ 2,227,087 ---------------------------------------------------------------------------------------------- Restaurants -- 1.1% 126,486 Domino's Pizza Group Plc $ 1,834,752 ------------- Total Consumer Services $ 4,061,839 ---------------------------------------------------------------------------------------------- MEDIA -- 1.9% Advertising -- 0.6% 17,787 Publicis Groupe SA $ 1,098,754 ---------------------------------------------------------------------------------------------- Broadcasting -- 1.3% 43,628 CBS Corp. (Class B) $ 2,110,723 ------------- Total Media $ 3,209,477 ---------------------------------------------------------------------------------------------- RETAILING -- 2.1% Internet Retail -- 0.4% 55,692 Vipshop Holdings, Ltd. (A.D.R.)* $ 618,738 ---------------------------------------------------------------------------------------------- Apparel Retail -- 1.7% 37,390 The TJX Companies, Inc. $ 2,770,599 ------------- Total Retailing $ 3,389,337 ---------------------------------------------------------------------------------------------- FOOD & STAPLES RETAILING -- 6.5% Drug Retail -- 5.3% 53,013 CVS Health Corp. $ 5,151,273 52,700 Sundrug Co., Ltd. 3,468,785 ------------- $ 8,620,058 ---------------------------------------------------------------------------------------------- Food Retail -- 1.2% 25,599 Walgreens Boots Alliance, Inc. $ 2,020,785 ------------- Total Food & Staples Retailing $ 10,640,843 ---------------------------------------------------------------------------------------------- FOOD, BEVERAGE & TOBACCO -- 2.9% Soft Drinks -- 1.7% 294,628 Britvic Plc $ 2,834,371 ---------------------------------------------------------------------------------------------- Packaged Foods & Meats -- 1.2% 5,391 Keurig Green Mountain, Inc. $ 495,649 9,572 The Hershey Co. 869,999 1,008,500 WH Group, Ltd.* 586,062 ------------- $ 1,951,710 ------------- Total Food, Beverage & Tobacco $ 4,786,081 ---------------------------------------------------------------------------------------------- HEALTH CARE EQUIPMENT & SERVICES -- 5.6% Health Care Equipment -- 0.6% 10,773 Edwards Lifesciences Corp.* $ 937,251 ---------------------------------------------------------------------------------------------- Health Care Distributors -- 3.4% 67,947 Cardinal Health, Inc. $ 5,551,270 ---------------------------------------------------------------------------------------------- Managed Health Care -- 0.6% 5,216 Humana, Inc. $ 923,076 ---------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 18 Pioneer Global Equity Fund | Semiannual Report | 2/29/16 ---------------------------------------------------------------------------------------------- Shares Value ---------------------------------------------------------------------------------------------- Health Care Technology -- 1.0% 69,745 NNIT A/S $ 1,728,751 ------------- Total Health Care Equipment & Services $ 9,140,348 ---------------------------------------------------------------------------------------------- PHARMACEUTICALS, BIOTECHNOLOGY & LIFE SCIENCES -- 15.4% Biotechnology -- 2.2% 52,344 Baxalta, Inc. $ 2,016,291 18,867 Gilead Sciences, Inc.* 1,646,146 ------------- $ 3,662,437 ---------------------------------------------------------------------------------------------- Pharmaceuticals -- 12.3% 9,131 Jazz Pharmaceuticals Plc* $ 1,110,147 45,066 Johnson & Johnson 4,741,394 24,227 Merck & Co., Inc. 1,216,438 53,346 Novartis AG 3,808,651 95,873 Pfizer, Inc. 2,844,552 17,276 Roche Holding AG 4,426,614 38,146 Shire Plc 1,991,085 ------------- $ 20,138,881 ---------------------------------------------------------------------------------------------- Life Sciences Tools & Services -- 0.9% 10,762 Thermo Fisher Scientific, Inc. $ 1,390,343 ------------- Total Pharmaceuticals, Biotechnology & Life Sciences $ 25,191,661 ---------------------------------------------------------------------------------------------- BANKS -- 8.5% Diversified Banks -- 6.6% 340,802 Aldermore Group Plc $ 943,004 202,494 Grupo Financiero Banorte SAB de CV 1,023,190 67,955 JPMorgan Chase & Co. 3,825,866 582,700 Mitsubishi UFJ Financial Group, Inc. 2,496,495 89,800 Sumitomo Mitsui Financial Group, Inc. 2,502,818 ------------- $ 10,791,373 ---------------------------------------------------------------------------------------------- Regional Banks -- 1.9% 38,836 The PNC Financial Services Group, Inc. $ 3,157,755 ------------- Total Banks $ 13,949,128 ---------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 5.5% Specialized Finance -- 2.7% 9,169 Intercontinental Exchange, Inc. $ 2,186,440 35,988 Nasdaq, Inc. 2,277,681 ------------- $ 4,464,121 ---------------------------------------------------------------------------------------------- Consumer Finance -- 1.2% 41,123 Discover Financial Services, Inc. $ 1,908,930 ---------------------------------------------------------------------------------------------- Investment Banking & Brokerage -- 1.6% 64,006 Morgan Stanley Co. $ 1,580,948 6,976 The Goldman Sachs Group, Inc. 1,043,121 ------------- $ 2,624,069 ------------- Total Diversified Financials $ 8,997,120 ---------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Global Equity Fund | Semiannual Report | 2/29/16 19 Schedule of Investments | 2/29/16 (unaudited) (continued) ---------------------------------------------------------------------------------------------- Shares Value ---------------------------------------------------------------------------------------------- INSURANCE -- 3.3% Insurance Brokers -- 0.7% 10,593 Willis Towers Watson Plc $ 1,200,399 ---------------------------------------------------------------------------------------------- Multi-line Insurance -- 2.6% 28,084 Allianz SE* $ 4,191,588 ------------- Total Insurance $ 5,391,987 ---------------------------------------------------------------------------------------------- REAL ESTATE -- 1.3% Diversified Real Estate Activities -- 1.3% 357,300 Leopalace21 Corp. $ 2,065,303 ------------- Total Real Estate $ 2,065,303 ---------------------------------------------------------------------------------------------- SOFTWARE & SERVICES -- 13.6% Internet Software & Services -- 5.6% 5,295 Alphabet, Inc. (Class A) $ 3,797,680 5,421 Alphabet, Inc. (Class C) 3,782,611 69,317 eBay, Inc.* 1,649,745 ------------- $ 9,230,036 ---------------------------------------------------------------------------------------------- Data Processing & Outsourced Services -- 3.3% 72,329 PayPal Holdings, Inc. $ 2,758,628 35,721 Visa, Inc. 2,585,843 ------------- $ 5,344,471 ---------------------------------------------------------------------------------------------- Systems Software -- 4.7% 152,103 Microsoft Corp. $ 7,739,001 ------------- Total Software & Services $ 22,313,508 ---------------------------------------------------------------------------------------------- TECHNOLOGY HARDWARE & EQUIPMENT -- 6.0% Communications Equipment -- 0.7% 22,127 Qualcomm, Inc. $ 1,123,830 ---------------------------------------------------------------------------------------------- Computer Storage & Peripherals -- 4.1% 70,190 Apple, Inc. $ 6,786,671 ---------------------------------------------------------------------------------------------- Technology Hardware, Storage & Peripherals -- 1.0% 69,373 NetApp, Inc. $ 1,723,225 ---------------------------------------------------------------------------------------------- Electronic Manufacturing Services -- 0.2% 95,000 Global Display Co., Ltd. $ 264,24 ------------- Total Technology Hardware & Equipment $ 9,897,973 ---------------------------------------------------------------------------------------------- SEMICONDUCTORS & SEMICONDUCTOR EQUIPMENT -- 1.5% Semiconductors -- 1.5% 50,515 SK Hynix, Inc. $ 1,219,868 276,000 Taiwan Semiconductor Manufacturing Co., Ltd. 1,239,760 ------------- $ 2,459,628 ------------- Total Semiconductors & Semiconductor Equipment $ 2,459,628 ---------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 20 Pioneer Global Equity Fund | Semiannual Report | 2/29/16 ---------------------------------------------------------------------------------------------- Shares Value ---------------------------------------------------------------------------------------------- TELECOMMUNICATION SERVICES -- 5.8% Integrated Telecommunication Services -- 5.8% 102,151 Euskaltel SA $ 1,116,060 83,300 Nippon Telegraph & Telephone Corp. 3,563,583 118,925 Orange SA 2,054,695 53,562 Verizon Communications, Inc. 2,717,200 ------------- $ 9,451,538 ------------- Total Telecommunication Services $ 9,451,538 ---------------------------------------------------------------------------------------------- TOTAL COMMON STOCKS (Cost $162,617,607) $ 160,561,699 ---------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------- Principal Amount ($) ---------------------------------------------------------------------------------------------- FOREIGN GOVERNMENT BONDS -- 1.7% IDR 16,648,000,000 Indonesia Treasury Bond, 8.375%, 3/15/24 $ 1,242,761 IDR 20,666,000,000 Indonesia Treasury Bond, 8.75%, 5/15/31 1,562,267 ---------------------------------------------------------------------------------------------- TOTAL FOREIGN GOVERNMENT BONDS (Cost $2,862,704) $ 2,805,028 ---------------------------------------------------------------------------------------------- TOTAL INVESTMENT IN SECURITIES -- 99.7% (Cost $165,480,311) (a) (b) $ 163,366,727 ---------------------------------------------------------------------------------------------- OTHER ASSETS & LIABILITIES -- 0.3% $ 459,798 ---------------------------------------------------------------------------------------------- TOTAL NET ASSETS -- 100.0% $ 163,826,525 ============================================================================================== * Non-income producing security. (A.D.R.) American Depositary Receipts. (a) At February 29, 2016, the net unrealized depreciation on investments based on cost for federal income tax purposes of $165,627,134 was as follows: Aggregate gross unrealized appreciation for all investments in which there is an excess of value over tax cost $ 13,312,690 Aggregate gross unrealized depreciation for all investments in which there is an excess of tax cost over value (15,573,097) ------------ Net unrealized depreciation $ (2,260,407) ============ (b) Distributions of investments by country of issue, as a percentage of total investment in securities (excluding temporary cash investments), is as follows: United States 55.5% Japan 15.5% United Kingdom 7.1% Switzerland 5.0% Germany 3.7% Denmark 2.1% Ireland 2.0% France 1.9% Indonesia 1.7% Jersey Channel Islands 1.2% Other (individually less than 1%) 4.3% ----- 100.0% ===== The accompanying notes are an integral part of these financial statements. Pioneer Global Equity Fund | Semiannual Report | 2/29/16 21 Schedule of Investments | 2/29/16 (unaudited) (continued) Purchases and sales of securities (excluding temporary cash investments) for the six months ended February 29, 2016, aggregated $64,426,453 and $53,392,828, respectively. Various inputs are used in determining the value of the Fund's investments. These inputs are summarized in the three broad levels listed below. Level 1 -- quoted prices in active markets for identical securities. Level 2 -- other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.) See Notes to Financial Statements -- Note 1A. Level 3 -- significant unobservable inputs (including the Fund's own assumptions in determining fair value of investments) See Notes to Financial Statements -- Note 1A. The following is a summary of the inputs used as of February 29, 2016, in valuing the Fund's investments: ------------------------------------------------------------------------------------------------------ Level 1 Level 2 Level 3 Total ------------------------------------------------------------------------------------------------------ Common Stocks Capital Goods Heavy Electrical Equipment $ -- $ 4,411,859 $-- $ 4,411,859 Transportation Airlines 1,774,849 2,287,681 -- 4,062,530 Trucking -- 1,685,308 -- 1,685,308 Automobiles & Components Tires & Rubber -- 1,639,784 -- 1,639,784 Automobile Manufacturers -- 1,801,157 -- 1,801,157 Consumer Durables & Apparel Consumer Electronics -- 1,870,274 -- 1,870,274 Homebuilding 509,047 3,302,942 -- 3,811,989 Apparel, Accessories & Luxury Goods -- 1,500,831 -- 1,500,831 Consumer Services Hotels, Resorts & Cruise Lines -- 2,227,087 -- 2,227,087 Restaurants -- 1,834,752 -- 1,834,752 Media Advertising -- 1,098,754 -- 1,098,754 Food & Staples Retailing Drug Retail 5,151,273 3,468,785 -- 8,620,058 Food, Beverage & Tobacco Soft Drinks -- 2,834,371 -- 2,834,371 Packaged Foods & Meats 1,365,648 586,062 -- 1,951,710 Health Care Equipment & Services Health Care Technology -- 1,728,751 -- 1,728,751 Pharmaceuticals, Biotechnology & Life Sciences Pharmaceuticals 9,912,531 10,226,350 -- 20,138,881 Banks Diversified Banks 3,825,866 6,965,507 -- 10,791,373 Insurance Multi-line Insurance -- 4,191,588 -- 4,191,588 Real Estate Diversified Real Estate Activities -- 2,065,303 -- 2,065,303 Technology Hardware & Equipment Electronic Manufacturing Services -- 264,247 -- 264,247 Semiconductors & Semiconductor Equipment Semiconductors -- 2,459,628 -- 2,459,628 Telecommunication Services Integrated Telecommunication Services 2,717,200 6,734,338 -- 9,451,538 All Other Common Stocks 70,119,926 -- -- 70,119,926 Foreign Government Bonds -- 2,805,028 -- 2,805,028 ------------------------------------------------------------------------------------------------------ Total $ 95,376,340 $67,990,387 $-- $163,366,727 ====================================================================================================== The accompanying notes are an integral part of these financial statements. 22 Pioneer Global Equity Fund | Semiannual Report | 2/29/16 Other Financial Instruments Unrealized appreciation on futures contracts $11,498 $ -- $-- $11,498 -------------------------------------------------------------------------------------------- Total Other Financial Instruments $11,498 $ -- $-- $11,498 ============================================================================================ During the six months ended February 29, 2016, there were no transfers between Levels 1, 2 and 3. The following is a summary of the fair valuation of certain Fund's assets and liabilities as of February 29, 2016. -------------------------------------------------------------------------------------------------- Level 1 Level 2 Level 3 Total -------------------------------------------------------------------------------------------------- Assets: Restricted cash $ -- $220,890 $ -- $220,890 Foreign currencies, at value -- 395,813 -- 395,813 Liabilities: Variation margin for futures contracts (45,210) -- -- (45,210) -------------------------------------------------------------------------------------------------- Total $ (45,210) $616,703 $ -- $571,493 ================================================================================================== The accompanying notes are an integral part of these financial statements. Pioneer Global Equity Fund | Semiannual Report | 2/29/16 23 Statement of Assets and Liabilities | 2/29/16 (unaudited) ASSETS: Investment in securities (cost $165,480,311) $163,366,727 Cash Foreign currencies, at value (cost $401,279) 395,813 Restricted cash* 220,890 Receivables -- Investment securities sold 1,751,262 Fund shares sold 174,853 Dividends and foreign taxes withheld of $25,998 716,268 Due from Pioneer Investment Management, Inc. 46,404 Unrealized appreciation on futures contracts 11,498 Other assets 45,339 -------------------------------------------------------------------------------------------------- Total assets $166,729,054 ================================================================================================== LIABILITIES: Payables -- Investment securities purchased $ 458,631 Fund shares repurchased 512,988 Trustee fees 1,179 Due to custodian 1,667,810 Variation margin for futures contracts 45,210 Due to affiliates 77,258 Accrued expenses 139,453 -------------------------------------------------------------------------------------------------- Total liabilities $ 2,902,529 ================================================================================================== NET ASSETS: Paid-in capital $187,187,121 Undistributed net investment income 190,606 Accumulated net realized loss on investments, futures contracts, swap contracts and foreign currency transactions (21,418,101) Net unrealized depreciation on investments (2,113,584) Net unrealized appreciation on futures contracts 11,498 Net unrealized depreciation on forward foreign currency contracts and other assets and liabilities denominated in foreign currencies (31,015) -------------------------------------------------------------------------------------------------- Total net assets $163,826,525 ================================================================================================== NET ASSET VALUE PER SHARE: (No par value, unlimited number of shares authorized) Class A (based on $71,063,359/5,832,759 shares) $ 12.18 Class C (based on $12,581,957/1,052,999 shares) $ 11.95 Class K (based on $49,366,000/4,050,869 shares) $ 12.19 Class R (based on $9,995,069/824,250 shares) $ 12.13 Class Y (based on $20,820,140/1,704,801 shares) $ 12.21 MAXIMUM OFFERING PRICE: Class A ($12.18 (divided by) 94.25%) $ 12.92 ================================================================================================== * Represents restricted cash deposited at the custodian and/or counterparty for derivative contracts. The accompanying notes are an integral part of these financial statements. 24 Pioneer Global Equity Fund | Semiannual Report | 2/29/16 Statement of Operations (unaudited) For the Six Months Ended 2/29/16 INVESTMENT INCOME: Dividends (net of foreign taxes withheld of $57,722) $ 1,530,243 Interest 10,333 ------------------------------------------------------------------------------------------------------------ Total investment income $ 1,540,576 ------------------------------------------------------------------------------------------------------------ EXPENSES: Management fees $ 639,587 Transfer agent fees Class A 59,790 Class C 6,902 Class K 1,199 Class R 156 Class Y 659 Distribution fees Class A 94,348 Class C 66,083 Class R 15,727 Shareholder communications expense 77,320 Administrative expense 41,434 Custodian fees 19,388 Registration fees 33,767 Professional fees 30,406 Printing expense 9,559 Fees and expenses of nonaffiliated Trustees 3,882 Miscellaneous 6,909 ------------------------------------------------------------------------------------------------------------ Total expenses $ 1,107,116 Less fees waived and expenses reimbursed by Pioneer Investment Management, Inc. (131,556) ------------------------------------------------------------------------------------------------------------ Net expenses $ 975,560 ------------------------------------------------------------------------------------------------------------ Net investment income $ 565,016 ------------------------------------------------------------------------------------------------------------ REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS, FUTURES CONTRACTS, WRITTEN OPTIONS AND FOREIGN CURRENCY TRANSACTIONS: Net realized gain (loss) on: Investments (net of foreign capital gains taxes of $2,306) $ (4,998,446) Futures contracts (67,151) Written options 33,025 Other assets and liabilities denominated in foreign currencies (83,625) $ (5,116,197) ------------------------------------------------------------------------------------------------------------ Change in net unrealized appreciation (depreciation) on: Investments $ (5,657,018) Futures contracts 11,498 Other assets and liabilities denominated in foreign currencies (4,389) $ (5,649,909) ------------------------------------------------------------------------------------------------------------ Net realized and unrealized gain (loss) on investments, futures contracts, written options and foreign currency transactions $(10,766,106) ------------------------------------------------------------------------------------------------------------ Net decrease in net assets resulting from operations $(10,201,090) ============================================================================================================ The accompanying notes are an integral part of these financial statements. Pioneer Global Equity Fund | Semiannual Report | 2/29/16 25 Statements of Changes in Net Assets ------------------------------------------------------------------------------------------------------------ Six Months Ended 2/29/16 Year Ended (unaudited) 8/31/15 ------------------------------------------------------------------------------------------------------------ FROM OPERATIONS: Net investment income (loss) $ 565,016 $ 1,304,453 Net realized gain (loss) on investments, futures contracts, written options, and foreign currency transactions (5,116,197) 10,505,297 Change in net unrealized appreciation (depreciation) on investments, futures contracts and foreign currency transactions (5,649,909) (20,554,877) ------------------------------------------------------------------------------------------------------------ Net decrease in net assets resulting from operations $ (10,201,090) $ (8,745,127) ------------------------------------------------------------------------------------------------------------ DISTRIBUTIONS TO SHAREOWNERS: Net investment income: Class A ($0.08 and $0.38 per share, respectively) $ (471,470) $ (2,165,744) Class C ($0.00 and $0.30 per share, respectively) -- (252,529) Class K ($0.15 and $0.00 per share, respectively) (589,987) -- Class R ($0.13 and $0.00 per share, respectively) (76,329) -- Class Y ($0.15 and $0.45 per share, respectively) (271,227) (2,272,661) ------------------------------------------------------------------------------------------------------------ Total distributions to shareowners $ (1,409,013) $ (4,690,934) ------------------------------------------------------------------------------------------------------------ FROM FUND SHARE TRANSACTIONS: (a) Net proceeds from sale or exchange of shares $ 22,992,159 $121,389,969 Reinvestment of distributions 658,285 2,627,476 Cost of shares repurchased (19,305,026) (97,010,855) ------------------------------------------------------------------------------------------------------------ Net increase in net assets resulting from Fund share transactions $ 4,345,418 $ 27,006,590 ------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net assets $ (7,264,685) $ 13,570,529 NET ASSETS: Beginning of period $ 171,091,210 $157,520,681 ------------------------------------------------------------------------------------------------------------ End of period $ 163,826,525 $171,091,210 ------------------------------------------------------------------------------------------------------------ Undistributed net investment income $ 190,606 $ 1,034,603 ------------------------------------------------------------------------------------------------------------ (a) At February 29, 2016, Pioneer Asset Allocation Trust owned 30.1% of the value of outstanding shares of Pioneer Global Equity Fund. The accompanying notes are an integral part of these financial statements. 26 Pioneer Global Equity Fund | Semiannual Report | 2/29/16 ---------------------------------------------------------------------------------------------------------- Six Months Six Months Ended Ended 2/29/16 2/29/16 Year Ended Year Ended Shares Amount 8/31/15 8/31/15 (unaudited) (unaudited) Shares Amount ---------------------------------------------------------------------------------------------------------- Class A Shares sold 592,963 $ 7,753,566 1,540,016 $ 21,741,127 Reinvestment of distributions 33,908 449,960 152,847 2,090,959 Less shares repurchased (726,285) (9,182,294) (1,217,019) (17,064,588) ---------------------------------------------------------------------------------------------------------- Net increase (decrease) (99,414) $ (978,768) 475,844 $ 6,767,498 ========================================================================================================== Class B* Shares sold or exchanged -- $ -- -- $ -- Reinvestment of distributions -- -- -- -- Less shares repurchased -- -- (149,799) (2,044,742) ---------------------------------------------------------------------------------------------------------- Net decrease -- $ -- (149,799) $ (2,044,742) ========================================================================================================== Class C Shares sold 158,863 $ 2,012,705 625,499 $ 8,578,097 Reinvestment of distributions -- -- 17,966 241,637 Less shares repurchased (170,958) (2,129,500) (189,906) (2,624,849) ---------------------------------------------------------------------------------------------------------- Net increase (decrease) (12,095) $ (116,795) 453,559 $ 6,194,885 ========================================================================================================== Class K** Shares sold -- $ -- 4,271,583 $ 57,908,556 Reinvestment of distributions -- -- -- -- Less shares repurchased (115,193) (1,439,895) (105,521) (1,492,962) ---------------------------------------------------------------------------------------------------------- Net increase (decrease) (115,193) $ (1,439,895) 4,166,062 $ 56,415,594 ========================================================================================================== Class R*** Shares sold 694,287 $ 8,883,218 181,756 $ 2,526,092 Reinvestment of distributions -- -- -- -- Less shares repurchased (47,361) (594,628) (4,432) (62,198) ---------------------------------------------------------------------------------------------------------- Net increase 646,926 $ 8,288,590 177,324 $ 2,463,894 ========================================================================================================== Class Y Shares sold 333,414 $ 4,342,670 2,156,949 $ 30,636,097 Reinvestment of distributions 15,675 208,325 21,508 294,880 Less shares repurchased (467,391) (5,958,709) (5,339,157) (73,721,516) ---------------------------------------------------------------------------------------------------------- Net decrease (118,302) $ (1,407,714) (3,160,700) $ (42,790,539) ========================================================================================================== * Class B shares converted to Class A shares on November 10, 2014. ** Class K shares commenced operations on December 31, 2014. *** Class R shares commenced operations on July 1, 2015. The accompanying notes are an integral part of these financial statements. Pioneer Global Equity Fund | Semiannual Report | 2/29/16 27 Financial Highlights -------------------------------------------------------------------------------------------------------------------------------- Six Months Ended Year Year Year Year Year 2/29/16 Ended Ended Ended Ended Ended (unaudited) 8/31/15 8/31/14 8/31/13 8/31/12 8/31/11 -------------------------------------------------------------------------------------------------------------------------------- Class A Net asset value, beginning of period $ 13.00 $ 14.05 $ 11.31 $ 9.64 $ 9.27 $ 8.44 -------------------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) $ 0.03(a) $ 0.07 $ 0.27 $ 0.15 $ 0.17 $ 0.13 Net realized and unrealized gain (loss) on investments (0.77) (0.74) 2.67 1.68 0.33 0.76 -------------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ (0.74) $ (0.67) $ 2.94 $ 1.83 $ 0.50 $ 0.89 -------------------------------------------------------------------------------------------------------------------------------- Distribution to shareowners: Net investment income $ (0.08) $ (0.38) $ (0.20) $ (0.16) $ (0.13) $ (0.06) -------------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ (0.82) $ (1.05) $ 2.74 $ 1.67 $ 0.37 $ 0.83 -------------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 12.18 $ 13.00 $ 14.05 $ 11.31 $ 9.64 $ 9.27 ================================================================================================================================ Total return* (5.75)% (4.88)% 26.13% 19.17% 5.50% 10.48% Ratio of net expenses to average net assets 1.30%** 1.30% 1.30% 1.30% 1.30% 1.30% Ratio of net investment income (loss) to average net assets 0.50%** 0.60% 2.01% 1.35% 1.71% 1.23% Portfolio turnover rate 64%** 109% 121% 160% 152% 194% Net assets, end of period (in thousands) $71,063 $77,115 $76,638 $62,996 $56,970 $60,701 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses to average net assets 1.45%** 1.50% 1.56% 1.67% 1.72% 1.67% Net investment income (loss) to average net assets 0.35%** 0.40% 1.75% 0.98% 1.29% 0.86% ================================================================================================================================ * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period and no sales charges. Total return would be reduced if sales charges were taken into account. ** Annualized. (a) The per-share data presented above is based on the average shares outstanding for the period presented. The accompanying notes are an integral part of these financial statements. 28 Pioneer Global Equity Fund | Semiannual Report | 2/29/16 ---------------------------------------------------------------------------------------------------------------------------------- Six Months Ended Year Year Year Year Year 2/29/16 Ended Ended Ended Ended Ended (unaudited) 8/31/15 8/31/14 8/31/13 8/31/12 8/31/11 ---------------------------------------------------------------------------------------------------------------------------------- Class C Net asset value, beginning of period $ 12.72 $ 13.78 $ 11.11 $ 9.47 $ 9.09 $ 8.31 ---------------------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) $ (0.01)(a)(b) $ (0.08)(a) $ 0.14 $ 0.05 $ 0.10 $ 0.04 Net realized and unrealized gain (loss) on investments (0.76) (0.68) 2.63 1.66 0.31 0.74 ---------------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ (0.77) $ (0.76) $ 2.77 $ 1.71 $ 0.41 $ 0.78 ---------------------------------------------------------------------------------------------------------------------------------- Distribution to shareowners: Net investment income $ -- $ (0.30) $ (0.10) $ (0.07) $ (0.03) $ -- ---------------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ (0.77) $ (1.06) $ 2.67 $ 1.64 $ 0.38 $ 0.78 ---------------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 11.95 $ 12.72 $ 13.78 $ 11.11 $ 9.47 $ 9.09 ================================================================================================================================== Total return* (6.05)% (5.60)% 24.98% 18.11% 4.56% 9.39% Ratio of net expenses to average net assets 2.02%** 2.05% 2.20% 2.20% 2.20% 2.20% Ratio of net investment income (loss) to average net assets (0.22)%** (0.14)% 1.13% 0.45% 0.82% 0.35% Portfolio turnover rate 64%** 109% 121% 160% 152% 194% Net assets, end of period (in thousands) $ 12,582 $13,552 $ 8,427 $ 6,516 $ 5,682 $ 6,439 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses to average net assets 2.14%** 2.21% 2.35% 2.51% 2.53% 2.48% Net investment income (loss) to average net assets (0.34)%** (0.30)% 0.98% 0.14% 0.49% 0.07% ================================================================================================================================== * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period and no sales charges. Total return would be reduced if sales charges were taken into account. ** Annualized. (a) The amount shown for a share outstanding does not correspond with net investment income on the Statement of Operations for the period due to timing of the sales and repurchase of shares. (b) The per-share data presented above is based on the average shares outstanding for the period presented. The accompanying notes are an integral part of these financial statements. Pioneer Global Equity Fund | Semiannual Report | 2/29/16 29 Financial Highlights (continued) ------------------------------------------------------------------------------------------------------------------ Six Months Ended 12/31/14 2/29/16 to (unaudited) 8/31/15 ------------------------------------------------------------------------------------------------------------------ Class K Net asset value, beginning of period $ 13.03 $ 13.51 ------------------------------------------------------------------------------------------------------------------ Increase (decrease) from investment operations: Net investment income (loss) $ 0.06(a) $ 0.11 Net realized and unrealized gain (loss) on investments (0.75) (0.59) ------------------------------------------------------------------------------------------------------------------ Net increase (decrease) from investment operations $ (0.69) $ (0.48) ------------------------------------------------------------------------------------------------------------------ Distribution to shareowners: Net investment income $ (0.15) $ -- ------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net asset value $ (0.84) $ (0.48) ------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $ 12.19 $ 13.03 ================================================================================================================== Total return* (5.42)% (3.55)%*** Ratio of net expenses to average net assets 0.80%** 0.79%** Ratio of net investment income (loss) to average net assets 1.00%** 1.44%** Portfolio turnover rate 64%** 109% Net assets, end of period (in thousands) $49,366 $ 54,305 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses 0.92%** 0.95%** Net investment income (loss) 0.88%** 1.28%** ================================================================================================================== * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions and the complete redemption of the investment at net asset value at the end of each period. ** Annualized. *** Not annualized. (a) The per-share data presented above is based on the average shares outstanding for the period presented. The accompanying notes are an integral part of these financial statements. 30 Pioneer Global Equity Fund | Semiannual Report | 2/29/16 ------------------------------------------------------------------------------------------------------------------ Six Months Ended 7/1/15 2/29/16 to (unaudited) 8/31/15 ------------------------------------------------------------------------------------------------------------------ Class R Net asset value, beginning of period $ 12.99 $ 14.08 ------------------------------------------------------------------------------------------------------------------ Increase (decrease) from investment operations: Net investment income (loss) $ 0.03(a) $ 0.00(b) Net realized and unrealized gain (loss) on investments (0.76) (1.09) ------------------------------------------------------------------------------------------------------------------ Net increase (decrease) from investment operations $ (0.73) $ (1.09) ------------------------------------------------------------------------------------------------------------------ Distribution to shareowners: Net investment income $ (0.13) $ -- ------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net asset value $ (0.86) $ (1.09) ------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $ 12.13 $ 12.99 ================================================================================================================== Total return* (5.71)% (7.74)%*** Ratio of net expenses to average net assets 1.55%** 1.38%** Ratio of net investment income (loss) to average net assets 0.42%** 0.25%** Portfolio turnover rate 64%** 109% Net assets, end of period (in thousands) $ 9,995 $ 2,304 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses to average net assets 1.68%** 1.55%** Net investment income (loss) to average net assets 0.30%** 0.08%** ================================================================================================================== * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions and the complete redemption of the investment at net asset value at the end of each period. ** Annualized. *** Not annualized. (a) The per-share data presented above is based on the average shares outstanding for the period presented. (b) Amount rounds to less than $0.01 or ($0.01) per share. The accompanying notes are an integral part of these financial statements. Pioneer Global Equity Fund | Semiannual Report | 2/29/16 31 Financial Highlights (continued) ---------------------------------------------------------------------------------------------------------------------------- Six Months Ended Year Year Year Year Year 2/29/16 Ended Ended Ended Ended Ended (unaudited) 8/31/15 8/31/14 8/31/13 8/31/12 8/31/11 ---------------------------------------------------------------------------------------------------------------------------- Class Y Net asset value, beginning of period $ 13.06 $ 14.12 $ 11.37 $ 9.69 $ 9.32 $ 8.49 ---------------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) $ 0.06(a) $ 0.01 $ 0.37 $ 0.20 $ 0.21 $ 0.18 Net realized and unrealized gain (loss) on investments (0.76) (0.62) 2.63 1.69 0.34 0.76 ---------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ (0.70) $ (0.61) $ 3.00 $ 1.89 $ 0.55 $ 0.94 ---------------------------------------------------------------------------------------------------------------------------- Distribution to shareowners: Net investment income $ (0.15) $ (0.45) $ (0.25) $ (0.21) $ (0.18) $ (0.11) ---------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ (0.85) $ (1.06) $ 2.75 $ 1.68 $ 0.37 $ 0.83 ---------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 12.21 $ 13.06 $ 14.12 $ 11.37 $ 9.69 $ 9.32 ============================================================================================================================ Total return* (5.49)% (4.48)% 26.66% 19.75% 6.09% 10.96% Ratio of net expenses to average net assets 0.80%** 0.80% 0.80% 0.80% 0.80% 0.80% Ratio of net investment income (loss) to average net assets 0.99%** 0.85% 2.58% 1.85% 2.22% 1.74% Portfolio turnover rate 64%** 109% 121% 160% 152% 194% Net assets, end of period (in thousands) $20,820 $23,815 $70,384 $71,726 $60,214 $59,927 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses to average net assets 1.06%** 0.96% 0.95% 1.00% 0.97% 0.95% Net investment income (loss) to average net assets 0.73%** 0.69% 2.43% 1.65% 2.05% 1.59% ============================================================================================================================ * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions and the complete redemption of the investment at net asset value at the end of each period. ** Annualized. (a) The per-share data presented above is based on the average shares outstanding for the period presented. The accompanying notes are an integral part of these financial statements. 32 Pioneer Global Equity Fund | Semiannual Report | 2/29/16 Notes to Financial Statements | 2/29/16 (unaudited) 1. Organization and Significant Accounting Policies Pioneer Global Equity Fund (the Fund), is one of five portfolios comprising Pioneer Series Trust V, a Delaware statutory trust. The Fund is registered under the Investment Company Act of 1940 as a diversified, open-end management investment company. The Fund commenced operations on December 15, 2005. The Fund's investment objective is to seek long-term capital growth. The Fund offers five classes of shares designated as Class A, Class C, Class K, Class R and Class Y shares. Class K shares commenced operations on December 31, 2014. Class R shares commenced operations on July 1, 2015. Class B shares were converted to Class A shares as of the close of business on November 10, 2014. Each class of shares represents an interest in the same portfolio of investments of the Fund and has identical rights (based on relative net asset values) to assets and liquidation proceeds. Share classes can bear different rates of class-specific fees and expenses such as transfer agent and distribution fees. Differences in class-specific fees and expenses will result in differences in net investment income and, therefore, the payment of different dividends from net investment income earned by each class. The Amended and Restated Declaration of Trust of the Fund gives the Board of Trustees the flexibility to specify either per-share voting or dollar-weighted voting when submitting matters for shareholder approval. Under per-share voting, each share of a class of the Fund is entitled to one vote. Under dollar-weighted voting, a shareholder's voting power is determined not by the number of shares owned, but by the dollar value of the shares on the record date. Each share class has exclusive voting rights with respect to matters affecting only that class, including with respect to the distribution plan for that class. There is no distribution plan for Class Y shares. The Fund's financial statements have been prepared in conformity with U.S. generally accepted accounting principles that require the management of the Fund to, among other things, make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of income, expenses and gain or loss on investments during the reporting period. Actual results could differ from those estimates. The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements: A. Security Valuation The net asset value of the Fund is computed once daily, on each day the New York Stock Exchange (NYSE) is open, as of the close of regular trading on the NYSE. Pioneer Global Equity Fund | Semiannual Report | 2/29/16 33 Equity securities that have traded on an exchange are valued by using the last sale price on the principal exchange where they are traded. Equity securities that have not traded on the date of valuation, or securities for which sale prices are not available, generally are valued using the mean between the last bid and asked prices or, if both last bid and asked prices are not available, at the last quoted bid price. Last sale and bid and asked prices are provided by independent third party pricing services. In the case of equity securities not traded on an exchange, prices are typically determined by independent third party pricing services using a variety of techniques and methods. The principal exchanges and markets for non-U.S. equity securities have closing times prior to the close of the NYSE. However, the value of these securities may be influenced by changes in global markets occurring after the closing times of the local exchanges and markets up to the time the Fund determines its net asset value. Consequently, the fund uses a fair value model developed by an independent pricing service to value non-U.S. equity securities. On a daily basis, the pricing service recommends changes, based on a proprietary model, to the closing market prices of each non-U.S. security held by the fund to reflect the security's fair value at the time the fund determines its net asset value. The fund applies these recommendations in accordance with procedures approved by the Board of Trustees. Futures contracts are generally valued at the closing settlement price established by the exchange on which they are traded. Options contracts are generally valued at the mean between the last bid and ask prices on the principal exchange where they are traded. Over-the-counter ("OTC") options and options on swaps ("swaptions") are valued using prices supplied by independent pricing services, which consider such factors as market prices, market events, quotations from one or more brokers, Treasury spreads, yields, maturities and ratings, or may use a pricing matrix or other fair value methods or techniques to provide an estimated value of the security or instrument. Inputs used when applying fair value methods to value a security may include credit ratings, the financial condition of the company, current market conditions and comparable securities. The Fund may use fair value methods if it is determined that a significant event has occurred after the close of the exchange or market on which the security trades and prior to the determination of the Fund's net asset value. Examples of a significant event might include political or economic news, corporate restructurings, natural disasters, terrorist activity or trading halts. Thus, the valuation of the Fund's securities may differ significantly from exchange prices, and such differences could be material. 34 Pioneer Global Equity Fund | Semiannual Report | 2/29/16 At February 29, 2016, no securities were valued using fair value methods (other than securities valued using prices supplied by independent pricing services, broker-dealers or using a third party insurance industry pricing model). B. Investment Income and Transactions Dividend income is recorded on the ex-dividend date, except that certain dividends from foreign securities where the ex-dividend date may have passed are recorded as soon as the Fund becomes aware of the ex-dividend data in the exercise of reasonable diligence. Interest income is recorded on the accrual basis. Dividend and interest income are reported net of unrecoverable foreign taxes withheld at the applicable country rates. Security transactions are recorded as of trade date. Gains and losses on sales of investments are calculated on the identified cost method for both financial reporting and federal income tax purposes. C. Federal Income Taxes It is the Fund's policy to comply with the requirements of the Internal Revenue Code applicable to regulated investment companies and to distribute all of its taxable income and net realized capital gains, if any, to its shareowners. Therefore, no provision for federal income taxes is required. As of August 31, 2015, the Fund did not accrue any interest or penalties with respect to uncertain tax positions, which, if applicable, would be recorded as an income tax expense in the Statement of Operations. Tax returns filed within the prior three years are subject to examination by Federal and State tax authorities. In addition to the requirements of the Internal Revenue Code, the Fund may also be required to pay local taxes on the recognition of capital gains and/or the repatriation of foreign currencies in certain countries. In determining the daily net asset value, the Fund estimates the reserve for such taxes, if any, associated with investments in certain countries. The estimated reserve for the capital gains is based on the net unrealized appreciation on certain portfolio securities, the holding period of such securities and the related tax rates, tax loss carryforward (if applicable) and other such factors. The amount and character of income and capital gain distributions to shareowners are determined in accordance with federal income tax rules, which may differ from U.S. generally accepted accounting principles. Distributions in excess of net investment income or net realized gains are temporary overdistributions for financial statement purposes resulting from differences in the recognition or classification of income or distributions for Pioneer Global Equity Fund | Semiannual Report | 2/29/16 35 financial statement and tax purposes. Capital accounts within the financial statements are adjusted for permanent book/tax differences to reflect tax character, but are not adjusted for temporary differences. The tax character of current year distributions payable will be determined at the end of the current taxable year. The tax character of distributions during the years ended August 31, 2015, was as follows: --------------------------------------------------------------------------- 2015 --------------------------------------------------------------------------- Distributions paid from: Ordinary income $4,690,934 --------------------------------------------------------------------------- Total $4,690,934 =========================================================================== The following shows the components of distributable earnings on a federal income tax basis at August 31, 2015: --------------------------------------------------------------------------- 2015 --------------------------------------------------------------------------- Distributable earnings: Undistributed ordinary income $ 1,034,603 Capital loss carryforward (16,155,081) Net unrealized appreciation 3,369,985 --------------------------------------------------------------------------- Total $(11,750,493) =========================================================================== The difference between book-basis and tax-basis net unrealized appreciation is attributable to the tax deferral of losses on wash sales. D. Fund Shares The Fund records sales and repurchases of its shares as of trade date. Pioneer Funds Distributor, Inc. (PFD), the principal underwriter for the Fund and a wholly owned indirect subsidiary of UniCredit S.p.A. (UniCredit), earned $5,511 in underwriting commissions on the sale of Class A shares during the six months ended February 29, 2016. E. Foreign Currency Translation The books and records of the Fund are maintained in U.S. dollars. Amounts denominated in foreign currencies are translated into U.S. dollars using current exchange rates. Net realized gains and losses on foreign currency transactions, if any, represent, among other things, the net realized gains and losses on foreign currency contracts, disposition of foreign currencies and the difference between the amount of income accrued and the U.S. dollars actually received. Further, the effects of changes in foreign currency exchange rates on investments are not segregated in the Statement of Operations from the effects of changes in the market price of those securities, but are included with the net realized and unrealized gain or loss on investments. 36 Pioneer Global Equity Fund | Semiannual Report | 2/29/16 F. Class Allocations Income, common expenses and realized and unrealized gains and losses are calculated at the Fund level and allocated daily to each class of shares based on its respective percentage of adjusted net assets at the beginning of the day. Distribution fees are calculated based on the average daily net asset value attributable to Class A, Class C and Class R shares of the Fund, respectively (see Note 4). Class K and Class Y shares do not pay distribution fees. All expenses and fees paid to the Fund's transfer agent for its services are allocated among the classes of shares based on the number of accounts in each class and the ratable allocation of related out-of-pocket expenses (see Note 3). Distributions to shareowners are recorded as of the ex-dividend date. Distributions paid by the Fund with respect to each class of shares are calculated in the same manner and at the same time, except that net investment income dividends to Class A, Class C, Class K, Class R and Class Y shares can reflect different transfer agent and distribution expense rates. G. Risks Investing in foreign and/or emerging markets securities involves risks relating to interest rates, currency exchange rates and economic and political conditions. At times, the Fund's investments may represent industries or industry sectors that are interrelated or have common risks, making the Fund more susceptible to any economic, political, or regulatory developments or other risks affecting those industries and sectors. The Fund's prospectus contains unaudited information regarding the Fund's principal risks. Please refer to that document when considering the Fund's principal risks. H. Futures Contracts The Fund may enter into futures transactions in order to attempt to hedge against changes in interest rates, securities prices and currency rates or to seek to increase total return. Futures contracts are types of derivatives. All futures contracts entered into by the Fund are traded on a futures exchange. Upon entering into a futures contract, the Fund is required to deposit with a broker an amount of cash or securities equal to the minimum "initial margin" requirements of the associated futures exchange. The amount of cash deposited with the broker as collateral at February 29, 2016, was $233,000 and is recorded within "Restricted cash" in the Statement of Assets and Liabilities. Subsequent payments for futures contracts ("variation margin") are paid or received by the Fund, depending on the daily fluctuation in the value of the contracts, and are recorded by the Fund as unrealized appreciation or depreciation. When the contract is closed, the Fund realizes a gain or loss equal to the difference between the opening and closing value of the contract Pioneer Global Equity Fund | Semiannual Report | 2/29/16 37 as well as any fluctuation in foreign currency exchange rates where applicable. The use of futures contracts involves, to varying degrees, elements of market, interest rate, currency exchange rate and counterparty risks, which may exceed the amounts recognized by the Fund. Changes in value of the contracts may not directly correlate to the changes in value of the underlying securities. These risks may decrease the effectiveness of the Fund's hedging strategies and potentially result in a loss. The average value of contracts open during the six months ended February 29, 2016, was $536,078. At February 29, 2016, open futures contracts were as follows: ----------------------------------------------------------------------------------------- Number of Contracts Settlement Unrealized Description Counterparty Long/(Short) Month/Year Value Appreciation ----------------------------------------------------------------------------------------- EURO STOXX 50 Citibank N.A. 21 3/16 $ 670,976 $ 10,405 Japanese Yen Citibank N.A. (45) 3/16 (4,987,687) 1,093 Currency ----------------------------------------------------------------------------------------- $(4,316,711) $ 11,498 ========================================================================================= I. Option Writing The Fund may write put and covered call options to seek to increase total return. When an option is written, the Fund receives a premium and becomes obligated to purchase or sell the underlying security at a fixed price, upon the exercise of the option. When the Fund writes an option, an amount equal to the premium received by the Fund is recorded as a liability and is subsequently adjusted to the current value of the option written. Premiums received from writing options that expire unexercised are treated by the Fund on the expiration date as realized gains from investments. The difference between the premium and the amount paid on effecting a closing purchase transaction, including brokerage commissions, is also treated as a realized gain, or, if the premium is less than the amount paid for the closing purchase transaction, as a realized loss. If a call option is exercised, the premium is added to the proceeds from the sale of the underlying security in determining whether the Fund has realized a gain or loss. The Fund as writer of an option bears the market risk of an unfavorable change in the price of the security underlying the written option. The average value of written option contracts open during the six months ended February 29, 2016, was $(2,058). There were no written options outstanding at February 29, 2016. 38 Pioneer Global Equity Fund | Semiannual Report | 2/29/16 2. Management Agreement PIM, a wholly owned indirect subsidiary of UniCredit, manages the Fund's portfolio. Management fees are calculated daily at the annual rate equal to 0.75% of the Fund's average daily net assets up to $500 million, 0.70% of the next $500 million of the Fund's average daily net assets and 0.65% of the Fund's average daily net assets over $1 billion. For the six months ended February 29, 2016, the effective management fee (excluding waivers and/or assumption of expenses) was equivalent to 0.64% of the Fund's average daily net assets. PIM has contractually agreed to limit ordinary operating expenses (ordinary operating expenses means all fund expenses other than extraordinary expenses, such as litigation, taxes, brokerage commissions and acquired fund fees and expenses) of the Fund to the extent required to reduce Fund expenses to 1.30%, 2.20%, 0.80%, 1.55% and 0.80% of the average daily net assets attributable to Class A, Class C, Class K, Class R and Class Y shares, respectively. Fees waived and expenses reimbursed during the six months ended February 29, 2016, are reflected on the Statement of Operations. These expense limitations are in effect through January 1, 2017. There can be no assurance that PIM will extend the expense limitation agreement for a class of shares beyond the date referred to above. In addition, under the management and administration agreements, certain other services and costs, including accounting, regulatory reporting and insurance premiums, are paid by the Fund as administrative reimbursements. Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $35,124 in management fees, administrative costs and certain other reimbursements payable to PIM at February 29, 2019. 3. Transfer Agent Prior to November 2, 2015, Pioneer Investment Management Shareholder Services, Inc. (PIMSS), a wholly owned indirect subsidiary of UniCredit, provided substantially all transfer agent and shareowner services to the Fund at negotiated rates. Effective November 2, 2015, Boston Financial Data Services serves as the transfer agent to the Fund at negotiated rates. In addition, the Fund reimburses the transfer agent for out-of-pocket expenses incurred by the transfer agent related to shareholder communications activities such as proxy and statement mailings, outgoing phone calls and omnibus relationship contracts. Pioneer Global Equity Fund | Semiannual Report | 2/29/16 39 For the six months ended February 29, 2016, such out-of-pocket expenses by class of shares were as follows: -------------------------------------------------------------------------------- Shareholder Communications: -------------------------------------------------------------------------------- Class A $45,862 Class C 7,749 Class K 20 Class R 7,349 Class Y 16,340 -------------------------------------------------------------------------------- Total: $77,320 ================================================================================ Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $38,206 in transfer agent fees and out-of-pocket reimbursements payable to the transfer agent at February 29, 2016. 4. Distribution Plan The Fund has adopted a Distribution Plan pursuant to Rule 12b-1 of the Investment Company Act of 1940 with respect to its Class A, Class C and Class R shares. Pursuant to the Plan, the Fund pays PFD 0.25% of the average daily net assets attributable to Class A shares as compensation for personal services and/or account maintenance services or distribution services with regard to Class A shares. Pursuant to the Plan, the Fund also pays PFD 1.00% of the average daily net assets attributable to Class C shares. The fee for Class C shares consists of a 0.25% service fee and a 0.75% distribution fee paid as compensation for personal services and/or account maintenance services or distribution services with regard to Class C shares. Pursuant to the Plan, the Fund further pays PFD 0.50% of the average daily net assets attributable to Class R shares held by such plans. Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $3,928 in distribution fees payable to PFD at February 29, 2016. The Fund also has adopted a separate service plan for Class R shares (Service Plan). The Service Plan authorizes the Fund to pay securities dealers, plan administrators or other service organizations that agree to provide certain services to retirement plans or plan participants holding shares of the Fund a service fee of up to 0.25% of the Fund's average daily net assets attributable to Class R shares held by such plans. In addition, redemptions of each class of shares (except Class R or Class Y shares) may be subject to a contingent deferred sales charge (CDSC). A CDSC of 1.00% may be imposed on redemptions of certain net asset value purchases of Class A shares within 12 months of purchase. Redemptions of Class C shares within 12 months of purchase are subject to a CDSC of 1.00%, based on the lower of cost or market value of shares being redeemed. Shares purchased as part of an exchange remain subject to any CDSC that applied to the original 40 Pioneer Global Equity Fund | Semiannual Report | 2/29/16 purchase of those shares. There is no CDSC for Class R or Class Y shares. Proceeds from the CDSCs are paid to PFD. For the six months ended February 29, 2016, CDSCs in the amount of $761 were paid to PFD. 5. Line of Credit Facility The Fund, along with certain other funds in the Pioneer Family of Funds (the Funds), participates in a committed, unsecured revolving line of credit facility. Borrowings are used solely for temporary or emergency purposes. The Fund may borrow up to the lesser of the amount available under the facility or the limits set for borrowing by the Fund's prospectus and the 1940 Act. The credit facility in effect until June 9, 2015, was in the amount of $215 million. For the period from June 9, 2015, to February 9, 2016, the facility was in the amount of $240 million. Effective February 10, 2016, the facility is in the amount of $220 million. Under such facility, depending on the type of loan, interest on borrowings is payable at the London Interbank Offered Rate (LIBOR) plus 0.85% on an annualized basis, or the Alternate Base Rate, which is the greater of (a) the facility's administrative agent's daily announced prime rate on the borrowing date, (b) 2% plus the Federal Funds Rate on the borrowing date and (c) 2% plus the overnight Eurodollar rate on the borrowing date. The Funds pay an annual commitment fee to participate in a credit facility. The commitment fee is allocated among participating Funds based on an allocation schedule set forth in the credit agreement. For the six months ended February 29, 2016, the Fund had no borrowings under the credit facility. 6. Additional Disclosures about Derivative Instruments and Hedging Activities The Fund's use of derivatives subjects it to the following risks: Interest rate risk relates to the fluctuations in the value of interest-bearing securities due to changes in the prevailing levels of market interest rates. Credit risk relates to the ability of the issuer of a financial instrument to make further principal or interest payments on an obligation or commitment that it has to the Fund. Foreign exchange rate risk relates to fluctuations in the value of an asset or liability due to changes in currency exchange rates. Equity risk relates to the fluctuations in the value of financial instruments as a result of changes in market prices (other than those arising from interest rate risk or foreign exchange risk), whether caused by factors specific to an individual investment, its issuer, or all factors affecting all instruments traded in a market or market segment. Pioneer Global Equity Fund | Semiannual Report | 2/29/16 41 Commodity risk relates to the risk that the value of a commodity or commodity index will fluctuate based on increases or decreases in the commodities market and factors specific to a particular industry or commodity. The fair value of open derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) by risk exposure at February 29, 2016 was as follows: ----------------------------------------------------------------------------------- Foreign Statement of Assets Interest Credit Exchange Equity Commodity and Liabilities Rate Risk Risk Risk Risk Risk ----------------------------------------------------------------------------------- Assets Unrealized appreciation on futures contracts $-- $-- $1,093 $10,405 $-- ----------------------------------------------------------------------------------- Total Value $-- $-- $1,093 $10,405 $-- =================================================================================== The effect of derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) on the Statement of Operations by risk exposure at February 29, 2016, was as follows: ----------------------------------------------------------------------------------- Foreign Statement of Interest Credit Exchange Equity Commodity Operations Rate Risk Risk Rate Risk Risk Risk ----------------------------------------------------------------------------------- Net realized gain (loss) on: Futures contracts $-- $-- $161,778 $(228,929) $-- Written options -- -- -- 33,025 -- ----------------------------------------------------------------------------------- Total Value $-- $-- $161,778 $ 195,904 $-- =================================================================================== Change in net unrealized appreciation (depreciation) on: Futures contracts $-- $-- $ 1,093 $ 10,405 $-- ----------------------------------------------------------------------------------- Total Value $-- $-- $ 1,093 $ 10,405 $-- =================================================================================== 42 Pioneer Global Equity Fund | Semiannual Report | 2/29/16 Additional Information (unaudited) PIM, the Fund's investment adviser, is currently an indirect, wholly owned subsidiary of UniCredit. On November 11, 2015, UniCredit announced that it signed a binding master agreement with Banco Santander and affiliates of Warburg Pincus and General Atlantic (the "Private Equity Firms") with respect to Pioneer Investments ("Pioneer") and Santander Asset Management ("SAM") (the "Transaction"). The Transaction, as previously announced by UniCredit, will establish a holding company, with the name Pioneer Investments, to be owned by UniCredit (50%) and the Private Equity Firms (50% between them). The holding company will control Pioneer's U.S. operations, including the Adviser. The holding company also will own 66.7% of Pioneer's and SAM's combined operations outside the U.S., while Banco Santander will own directly the remaining 33.3% stake. The closing of the Transaction is expected to happen in 2016, subject to certain regulatory and other approvals. Under the Investment Company Act of 1940, completion of the Transaction will cause the Fund's current investment advisory agreement with PIM to terminate. Accordingly, the Fund's Board of Trustees will be asked to approve a new investment advisory agreement. If approved by the Board, the Fund's new investment advisory agreement will be submitted to the shareholders of the Fund for their approval. Pioneer Global Equity Fund | Semiannual Report | 2/29/16 43 Approval of Investment Advisory Agreement Pioneer Investment Management, Inc. (PIM) serves as the investment adviser to Pioneer Global Equity Fund (the Fund) pursuant to an investment advisory agreement between PIM and the Fund. In order for PIM to remain the investment adviser of the Fund, the Trustees of the Fund must determine annually whether to renew the investment advisory agreement for the Fund. The contract review process began in January 2015 as the Trustees of the Fund agreed on, among other things, an overall approach and timeline for the process. Contract review materials were provided to the Trustees in March 2015 and July 2015. Supplemental contract review materials were provided to the Trustees in September 2015. In addition, the Trustees reviewed and discussed the Fund's performance at regularly scheduled meetings throughout the year, and took into account other information related to the Fund provided to the Trustees at regularly scheduled meetings, in connection with the review of the Fund's investment advisory agreement. In March 2015, the Trustees, among other things, discussed the memorandum provided by Fund counsel that summarized the legal standards and other considerations that are relevant to the Trustees in their deliberations regarding the renewal of the investment advisory agreement, and reviewed and discussed the qualifications of the investment management teams, as well as the level of investment by the Fund's portfolio managers in the Fund. In July 2015, the Trustees, among other things, reviewed the Fund's management fee and total expense ratios, the financial statements of PIM and its parent companies, the profitability analyses provided by PIM, and possible economies of scale. The Trustees also reviewed the profitability of the institutional business of PIM and PIM's affiliate, Pioneer Institutional Asset Management, Inc. (together with PIM, "Pioneer"), as compared to that of PIM's fund management business, and considered the differences between the fees and expenses of the Fund and the fees and expenses of Pioneer's institutional accounts, as well as the different services provided by PIM to the Fund and by Pioneer to the institutional accounts. The Trustees further considered contract review materials in September 2015. At a meeting held on September 15, 2015, based on their evaluation of the information provided by PIM and third parties, the Trustees of the Fund, including the Independent Trustees voting separately, unanimously approved the renewal of the investment advisory agreement for another year. In approving the renewal of the investment advisory agreement, the Trustees considered various factors that they determined were relevant, including the factors described below. The Trustees did not identify any single factor as the controlling factor in determining to approve the renewal of the agreement. 44 Pioneer Global Equity Fund | Semiannual Report | 2/29/16 Nature, Extent and Quality of Services The Trustees considered the nature, extent and quality of the services that had been provided by PIM to the Fund, taking into account the investment objective and strategy of the Fund. The Trustees also reviewed PIM's investment approach for the Fund and its research process. The Trustees considered the resources of PIM and the personnel of PIM who provide investment management services to the Fund. They also reviewed the amount of non-Fund assets managed by the portfolio managers of the Fund. The Trustees considered the non-investment resources and personnel of PIM involved in PIM's services to the Fund, including PIM's compliance and legal resources and personnel. The Trustees noted the substantial attention and high priority given by PIM's senior management to the Pioneer fund complex. The Trustees considered that PIM supervises and monitors the performance of the Fund's service providers and provides the Fund with personnel (including Fund officers) and other resources that are necessary for the Fund's business management and operations. The Trustees also considered that, as administrator, PIM is responsible for the administration of the Fund's business and other affairs. The Trustees considered the fees paid to PIM for the provision of administration services. Based on these considerations, the Trustees concluded that the nature, extent and quality of services that had been provided by PIM to the Fund were satisfactory and consistent with the terms of the investment advisory agreement. Performance of the Fund In considering the Fund's performance, the Trustees regularly review and discuss throughout the year data prepared by PIM and information comparing the Fund's performance with the performance of its peer group of funds as classified by each of Morningstar, Inc. (Morningstar) and Lipper, and with the performance of the Fund's benchmark index. They also discuss the Fund's performance with PIM on a regular basis. The Trustees' regular reviews and discussions were factored into the Trustees' deliberations concerning the renewal of the advisory agreement. Management Fee and Expenses The Trustees considered information showing the fees and expenses of the Fund in comparison to the management fees and expense ratios of its peer group of funds as classified by Morningstar and also to the expense ratios of a peer group of funds selected on the basis of criteria determined by the Independent Trustees for this purpose using data provided by Strategic Insight Pioneer Global Equity Fund | Semiannual Report | 2/29/16 45 Mutual Fund Research and Consulting, LLC (Strategic Insight), an independent third party. In all quintile rankings referred to below, first quintile is most favorable to the Fund's shareowners. The Trustees considered that the Fund's management fee for the most recent fiscal year was in the second quintile relative to the management fees paid by other funds in its Morningstar peer group for the comparable period. The Trustees also considered the breakpoints in the management fee schedule and the reduced fee rates above certain asset levels. The Trustees considered that the expense ratio of the Fund's Class A shares for the most recent fiscal year was in the third quintile relative to its Morningstar peer group and in the first quintile relative to its Strategic Insight peer group, in each case for the comparable period. The Trustees noted that PIM was waiving fees and/or reimbursing expenses in order to limit the ordinary operating expenses of the Fund. The Trustees considered the impact of transfer agency, sub-transfer agency, and other non-management fee expenses on the expense ratios of the Fund. The Trustees noted that they separately review the Fund's transfer agency, sub-transfer agency and intermediary arrangements. The Trustees reviewed management fees charged by Pioneer to institutional and other clients, including publicly offered European funds sponsored by affiliates of Pioneer, unaffiliated U.S. registered investment companies (in a sub-advisory capacity), and unaffiliated foreign and domestic separate accounts. The Trustees also considered PIM's costs in providing services to the Fund and Pioneer's costs in providing services to the other clients and considered the differences in management fees and profit margins for Fund and non-Fund services. In evaluating the fees associated with Pioneer's client accounts, the Trustees took into account the respective demands, resources and complexity associated with the Fund and client accounts. The Trustees noted that, in some instances, the fee rates for those clients were lower than the management fee for the Fund and considered that, under the investment advisory agreement with the Fund, PIM performs additional services for the Fund that it does not provide to those other clients or services that are broader in scope, including oversight of the Fund's other service providers and activities related to compliance and the extensive regulatory and tax regimes to which the Fund is subject. The Trustees also considered the different entrepreneurial risks associated with PIM's management of the Fund and Pioneer's management of the other client accounts. The Trustees concluded that the management fee payable by the Fund to PIM was reasonable in relation to the nature and quality of the services provided by PIM to the Fund. 46 Pioneer Global Equity Fund | Semiannual Report | 2/29/16 Profitability The Trustees considered information provided by PIM regarding the profitability of PIM with respect to the advisory services provided by PIM to the Fund, including the methodology used by PIM in allocating certain of its costs to the management of the Fund. The Trustees also considered PIM's profit margin in connection with the overall operation of the Fund. They further reviewed the financial results realized by PIM and its affiliates from non-fund businesses. The Trustees considered PIM's profit margins with respect to the Fund in comparison to the limited industry data available and noted that the profitability of any adviser was affected by numerous factors, including its organizational structure and method for allocating expenses. The Trustees concluded that PIM's profitability with respect to the management of the Fund was not unreasonable. Economies of Scale The Trustees considered PIM's views relating to economies of scale in connection with the Pioneer Funds as fund assets grow and the extent to which any such economies of scale are shared with funds and fund shareholders. The Trustees noted the breakpoints in the management fee schedule. The Trustees recognize that economies of scale are difficult to identify and quantify, and that, among other factors that may be relevant, are the following: fee levels, expense subsidization, investment by PIM in research and analytical capabilities and PIM's commitment and resource allocation to the Fund. The Trustees noted that profitability also may be an indicator of the availability of any economies of scale, although profitability may vary for other reasons including reductions in expenses. The Trustees concluded that economies of scale, if any, were being appropriately shared with the Funds. Other Benefits The Trustees considered the other benefits to PIM from its relationship with the Fund. The Trustees considered the character and amount of fees paid by the Fund, other than under the investment advisory agreement, for services provided by PIM and its affiliates. The Trustees further considered the revenues and profitability of PIM's businesses other than the fund business. Pioneer is the principal U.S. asset management business of Pioneer Global Asset Management, the worldwide asset management business of UniCredit Group, which manages over $150 billion in assets (including the Funds). Pioneer and the Funds receive reciprocal intangible benefits from the relationship, including mutual brand recognition and, for the Funds, direct and indirect access to the resources of a large global asset manager. The Trustees concluded that any such benefits received by Pioneer as a result of its Pioneer Global Equity Fund | Semiannual Report | 2/29/16 47 relationship with the Funds were reasonable and their consideration of the advisory agreement between the Fund and PIM and the fees thereunder were unaffected by Pioneer's possible receipt of any such intangible benefits. Conclusion After consideration of the factors described above as well as other factors, the Trustees, including all of the Independent Trustees, concluded that the investment advisory agreement between PIM and the Fund, including the fees payable thereunder, was fair and reasonable and voted to approve the proposed renewal of the investment advisory agreement for the Fund. 48 Pioneer Global Equity Fund | Semiannual Report | 2/29/16 Trustees, Officers and Service Providers Trustees Advisory Trustee Thomas J. Perna, Chairman Lorraine H. Monchak* David R. Bock Benjamin M. Friedman Officers Margaret B.W. Graham Lisa M. Jones, President and Chief Marguerite A. Piret Executive Officer Fred J. Ricciardi Mark E. Bradley, Treasurer and Kenneth J. Taubes Chief Financial Officer Christopher J. Kelley, Secretary and Chief Legal Officer Investment Adviser and Administrator Pioneer Investment Management, Inc. Custodian and Sub-Administrator Brown Brothers Harriman & Co. Principal Underwriter Pioneer Funds Distributor, Inc. Legal Counsel Morgan, Lewis & Bockius LLP Shareowner Services and Transfer Agent Boston Financial Data Services, Inc. Proxy Voting Policies and Procedures of the Fund are available without charge, upon request, by calling our toll free number (1-800-225-6292). Information regarding how the Fund voted proxies relating to portfolio securities during the most recent 12-month period ended June 30 is publicly available to shareowners at us.pioneerinvestments.com. This information is also available on the Securities and Exchange Commission's web site at www.sec.gov. * Ms. Monchak is a non-voting Advisory Trustee. Pioneer Global Equity Fund | Semiannual Report | 2/29/16 49 This page for your notes. 50 Pioneer Global Equity Fund | Semiannual Report | 2/29/16 This page for your notes. Pioneer Global Equity Fund | Semiannual Report | 2/29/16 51 This page for your notes. 52 Pioneer Global Equity Fund | Semiannual Report | 2/29/16 How to Contact Pioneer We are pleased to offer a variety of convenient ways for you to contact us for assistance or information. Call us for: -------------------------------------------------------------------------------- Account Information, including existing accounts, new accounts, prospectuses, applications and service forms 1-800-225-6292 FactFone(SM) for automated fund yields, prices, account information and transactions 1-800-225-4321 Retirement plans information 1-800-622-0176 Write to us: -------------------------------------------------------------------------------- Pioneer Funds P.O. Box 55014 Boston, Massachusetts 02205-5014 Our toll-free fax 1-800-225-4240 Our internet e-mail address ask.pioneer@pioneerinvestments.com (for general questions about Pioneer only) Visit our web site: us.pioneerinvestments.com This report must be preceded or accompanied by a prospectus. The Fund files a complete schedule of investments with the Securities and Exchange Commission for the first and third quarters for each fiscal year on Form N-Q. Shareholders may view the filed Form N-Q by visiting the Commission's web site at http://www.sec.gov. The filed form may also be viewed and copied at the Commission's Public Reference Room in Washington, DC. Information regarding the operations of the Public Reference Room may be obtained by calling 1-800-SEC-0330. [LOGO] PIONEER Investments(R) Pioneer Investment Management, Inc. 60 State Street Boston, MA 02109 us.pioneerinvestments.com Securities offered through Pioneer Funds Distributor, Inc. 60 State Street, Boston, MA 02109 Underwriter of Pioneer Mutual Funds, Member SIPC (C) 2016 Pioneer Investments 19129-10-0416 Pioneer High Income Municipal Fund -------------------------------------------------------------------------------- Semiannual Report | February 29, 2016 -------------------------------------------------------------------------------- Ticker Symbols: Class A PIMAX Class C HICMX Class Y HIMYX [LOGO] PIONEER Investments(R) visit us: us.pioneerinvestments.com Table of Contents President's Letter 2 Portfolio Management Discussion 4 Portfolio Summary 8 Prices and Distributions 9 Performance Update 10 Comparing Ongoing Fund Expenses 13 Schedule of Investments 15 Financial Statements 26 Notes to Financial Statements 33 Approval of Investment Advisory Agreement 41 Trustees, Officers and Service Providers 46 Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 1 President's Letter Dear Shareowner, Over the past several years, many investors experienced positive returns across most major asset classes. However, 2015 was a tale of two markets, with favorable market conditions in the first half of the year, followed by an abrupt slowdown and increased volatility beginning in August. The global markets were challenged by significant economic cross-currents in different geographic regions and industrial sectors. While the U.S. economy gradually improved, growth slowed in China. Emerging markets struggled following a decline in commodity prices, especially oil. While lower energy prices are good for the consumer, there were ripple effects throughout the global economy. Against this backdrop, the Standard & Poor's 500 Index rose by just 1.4% in 2015, international equity markets were essentially flat, and emerging market equities fell sharply. Across U.S. fixed-income sectors, U.S. government and investment-grade corporate bonds were fairly flat for the year, while high-yield bonds, as measured by the Bank of America Merrill Lynch Master II High Yield Index, posted a -4.9% total return. Entering 2016, we see the U.S. economy growing modestly, against an overall global economic backdrop that remains fragile and points towards structurally lower growth. As always in a presidential election year, political rhetoric has the potential to impact U.S. sectors such as health care in 2016. Economies around the world in both developed and emerging markets are experiencing deep structural change. Geopolitical instability on many fronts, the rising risk of policy mistakes, and market liquidity issues all increase the possibility of sharp swings in asset values. In this environment, financial markets remain vulnerable to unusual levels of volatility. While divergences among regions and industries is an important theme, we are generally optimistic about the outlook for the U.S. economy, which we expect will see continued, positive growth led by a strengthened consumer. Throughout Pioneer's history, we have believed in the importance of active management. In periods of market volatility, we believe that the value of active management is even more compelling. Our experienced and tenured investment teams focus on identifying value across global markets using proprietary research, careful risk management, and a long-term perspective. Our ongoing goal is to produce compelling returns consistent with the stated objectives of our investment products, and with our shareowners' expectations. We believe our shareowners can benefit from the experience and tenure of our investment teams as well as the insights generated from our extensive research process. 2 Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 As always, and particularly during times of market uncertainty, we encourage you to work with your financial advisor to develop an overall investment plan that addresses both your short- and long-term goals, and to implement such a plan in a disciplined manner. We greatly appreciate the trust you have placed in us and look forward to continuing to serve you in the future. Sincerely, /s/ Lisa M. Jones Lisa M. Jones President and CEO Pioneer Investment Management USA Inc. February 29, 2016 Any information in this shareowner report regarding market or economic trends or the factors influencing the Fund's historical or future performance are statements of opinion as of the date of this report. These statements should not be relied upon for any other purposes. Past performance is no guarantee of future results, and there is no guarantee that market forecasts discussed will be realized. Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 3 Portfolio Management Discussion | 2/29/16 High-yield municipal bond prices appreciated in value over the six-month period ended February 29, 2016, as investor demand remained strong while supply was limited. In the following interview, Jonathan Chirunga and David Eurkus discuss the factors that influenced the performance of Pioneer High Income Municipal Fund during the six-month period. Mr. Chirunga, a vice president and a portfolio manager at Pioneer, manages the Fund along with Mr. Eurkus, Director of Municipals, a senior vice president and a portfolio manager at Pioneer. Q How did the Fund perform during the six-month period ended February 29, 2016? A Pioneer High Income Municipal Fund's Class A shares returned 4.90% during the six-month period ended February 29, 2016, while the Fund's benchmark, the Barclays High Yield Municipal Bond Index (the Barclays Index), returned 5.68%. During the same period, the average return of the 155 mutual funds in Lipper's High-Yield Municipal Debt Funds category was 4.25%, and the average return of the 205 mutual funds in Morningstar's High-Yield Municipal Funds category was 4.24%. Q How would you describe the investment environment for high-yield municipal bonds during the six-month period ended February 29, 2016? A Demand for high-yield municipal bonds remained vigorous throughout the six-month period, and the asset class delivered a positive total return, even as most other high-yield segments of the fixed-income market posted negative results. In an environment where yields available on fixed-income investments remained low, the attractive current income and tax advantages of the high-yield municipal bond group proved compelling for many investors. Moreover, new issuance of high-yield municipals continued to be weak during a period when domestic economic growth remained modest (the annualized growth rate of U.S. gross domestic product, or GDP, in the final quarter of 2015 came in at less than 2%). In addition, new projects funded by municipal bond issuances were limited, as many state and local governments pursued policies of fiscal austerity and spending restraint. That was especially the case in states highly dependent on revenues from oil production such as Texas, Louisiana, Oklahoma, and Alaska, as oil prices continued their downward spiral during the six-month period. In that environment, high-yield municipal bond prices generally rose (leading to reductions in their effective yields) and the asset class outperformed the broader fixed-income market during the period. For example, despite headline news chronicling the fiscal problems of issuers such as the Commonwealth of Puerto Rico and the City of Chicago, even their new bonds generated strong demand from yield-seeking investors. 4 Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 Q What were the main reasons for the Fund's underperformance of the benchmark Barclays Index during the six-month period ended February 29, 2016? A While the Fund performed well in an absolute sense over the six-month period, its performance trailed that of the benchmark because we generally avoided owning bonds with weaker fundamentals that were of lower quality than the securities held in the portfolio. The Fund had very small exposures, for example, to the aforementioned debt of Puerto Rico and the City of Chicago. While Commonwealth of Puerto Rico issues represented 23% of the Barclays Index as of the end of the six-month period, the portfolio's exposure was merely slightly above 2% of invested assets. The Fund also had no exposure to securities issued by the City of Chicago, the Chicago Board of Education, or the State of Illinois, each of which had 2% weightings in the Barclays Index. However, as we noted earlier, even Puerto Rican and Chicago-related bonds performed well during the period, as technical supply/demand influences on the high-yield municipal market overcame investment fundamentals, even on troubled credits, and the Fund's underweights to those securities detracted from relative returns. Although the Fund underperformed the Barclays Index over the six-month period, we intend to maintain our commitment to invest the portfolio in fundamentally sound high-yield municipal debt securities that we believe should have solid long-term value. As for positioning during the six-month period, we stayed true to our traditional emphasis on holding project revenue bonds in the portfolio. We continued to favor revenue bonds over general obligation (G.O.) bonds because of their more predictable revenue sources and the cash flows that support payments by the bonds' issuers. As of February 29, 2016, the Fund's largest exposures by sector were to special revenue bonds, including tobacco bonds (29%), health/health care bonds (26%), and education bonds (19%). The Fund had just a small position in G.O. bonds, at roughly 4% of assets, as we generally avoid G.O. bonds due to their less predictable revenue sources. Q Which portfolio allocations or individual investments had the biggest effects on the Fund's performance, either positively or negatively, during the six-month period ended February 29, 2016? A The portfolio's relatively large position in special revenue bonds backed by proceeds from tobacco liability settlements (tobacco bonds) had a positive effect on the Fund's performance during the six-month period. Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 5 Among individual credits in the portfolio, holdings that supported the Fund's relative performance included the debt backed by the Esperanza Academy, a charter school in Philadelphia; a correctional facility in Otero County, New Mexico; continuing care retirement communities in the states of Washington and Illinois; and tobacco bonds issued by the states of Virginia and Michigan. Individual investments that underperformed and held back the Fund's relative results included securities backed by a wood pellet factory in Sanger, Texas, and a State of Michigan Strategic Lease revenue bond. Q Did the Fund invest in any derivative securities during the six-month period ended February 29, 2016? A No, the Fund did not have any exposure to derivatives during the period. Q What factors affected the Fund's yield during the six-month period ended February 29, 2016? A In an environment of rising prices and declining yields in the high-yield municipal market, the Fund's yield to shareholders did decline slightly during the period, as we did not "stretch" for the higher yields available on lower-quality bonds with weaker fundamentals. Q What is your investment outlook? A We think the overall environment for investing in high-yield municipal bonds is unlikely to change very much in the immediate future, as consistent demand and shrinking supply continue to support bond prices, even as yields available shrink to some degree. We believe the domestic economy should continue to expand at a steady, but modest pace in 2016, with GDP growing perhaps falling within a range of 2.0% to 2.5%. With only moderate overall growth, and pockets of weakness in energy-producing states, we think state and local governments will continue to try to limit any spending increases and restrict new municipal bond issuance. However, improving employment figures and decent activity in the housing sector should help sustain the overall growth in the domestic economy, despite evidence of weakness in foreign markets. In this environment, we expect to continue to keep the Fund's portfolio well diversified*, remaining focused on owning project revenue bonds and emphasizing what we believe are fundamentally sound investments with solid longer-term prospects. * Diversification does not assure a profit nor protect against loss. 6 Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 Please refer to the Schedule of Investments on pages 15-25 for a full listing of Fund securities. All investments are subject to risk, including the possible loss of principal. In the past several years, financial markets have experienced increased volatility, depressed valuations, decreased liquidity and heightened uncertainty. These conditions may continue, recur, worsen or spread. Investments in high-yield or lower-rated securities are subject to greater-than-average price volatility, illiquidity and possibility of default. When interest rates rise, the prices of fixed-income securities in the Fund will generally fall. Conversely, when interest rates fall, the prices of fixed income securities in the Fund will generally rise. Investments in the Fund are subject to possible loss due to the financial failure of issuers of underlying securities and their inability to meet their debt obligations. Prepayment risk is the chance that an issuer may exercise its right to prepay its security, if falling interest rates prompt the issuer to do so. Forced to reinvest the unanticipated proceeds at lower interest rates, the Fund would experience a decline in income and lose the opportunity for additional price appreciation. The value of municipal securities can be adversely affected by changes in financial condition of municipal issuers, lower revenues, and regulatory and political developments. The Fund is non-diversified, which means that it can invest a large percentage of its assets in the securities of any one or more issuers. This increases the Fund's potential risk exposure. The Fund may use derivatives, such as options, futures, inverse floating rate obligations, swaps, and others, which can be illiquid, may disproportionately increase losses, and have a potentially large impact on Fund performance. Derivatives may have a leveraging effect on the Fund. A portion of income may be subject to local, state, federal, and/or alternative minimum tax. Capital gains, if any, are subject to a capital gains tax. At times, the Fund's investments may represent industries or industry sectors that are interrelated or have common risks, making it more susceptible to any economic, political, or regulatory developments or other risks affecting those industries and sectors. These risks may increase share price volatility. Before investing, consider the product's investment objectives, risks, charges and expenses. Contact your advisor or Pioneer Investments for a prospectus or summary prospectus containing this information. Read it carefully. Any information in this shareholder report regarding market or economic trends or the factors influencing the Fund's historical or future performance are statements of opinion as of the date of this report. Past performance is not a guarantee of future results. Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 7 Portfolio Summary | 2/29/16 Sector Distribution -------------------------------------------------------------------------------- (As a percentage of total investment portfolio) [THE FOLLOWING DATA WAS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL] Special Revenues 29.2% Health 26.4% Education 19.0% Various Revenues 8.1% Pollution Control Revenue 6.8% General Obligation 4.3% Reserves 2.6% Transportation 2.2% Housing 0.6% Escrowed 0.5% Insured 0.3% 10 Largest Holdings -------------------------------------------------------------------------------- (As a percentage of total investment portfolio)* 1. Sanger Industrial Development Corp., Texas Pellets Project Series B, 8.0%, 7/1/38 3.04% ---------------------------------------------------------------------------------------------- 2. City of Philippi West Virginia, 7.75%, 10/1/44 2.73 ---------------------------------------------------------------------------------------------- 3. Commonwealth of Puerto Rico, 8.0%, 7/1/35 2.37 ---------------------------------------------------------------------------------------------- 4. Washington State Housing Finance Commission, Skyline at First Hill Project Series A, 5.625%, 1/1/38 2.18 ---------------------------------------------------------------------------------------------- 5. Golden State Tobacco Securitization Corp., 5.75%, 6/1/47 1.93 ---------------------------------------------------------------------------------------------- 6. Michigan Tobacco Settlement Finance Authority, 6.0%, 6/1/48 1.87 ---------------------------------------------------------------------------------------------- 7. Tobacco Settlement Financing Corp. Virginia, 5.0%, 6/1/47 1.86 ---------------------------------------------------------------------------------------------- 8. U.S. Treasury Bills, 3/17/16 1.82 ---------------------------------------------------------------------------------------------- 9. Pennsylvania Economic Development Financing Authority, US Airways Group Series B, 8.0%, 5/1/29 1.81 ---------------------------------------------------------------------------------------------- 10. Buckeye Tobacco Settlement Financing Authority, 5.875%, 6/1/47 1.53 ---------------------------------------------------------------------------------------------- * This list excludes temporary cash investments and derivative instruments. The portfolio is actively managed, and current holdings may be different. The holdings listed should not be considered recommendations to buy or sell any security listed. 8 Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 Prices and Distributions | 2/29/16 Net Asset Value per Share -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Class 2/29/16 8/31/15 -------------------------------------------------------------------------------- A $7.37 $7.22 -------------------------------------------------------------------------------- C $7.38 $7.22 -------------------------------------------------------------------------------- Y $7.28 $7.12 -------------------------------------------------------------------------------- Distributions per Share: 9/1/15-2/29/16 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Net Investment Short-Term Long-Term Class Income Capital Gains Capital Gains -------------------------------------------------------------------------------- A $0.2000 $ -- $ -- -------------------------------------------------------------------------------- C $0.1721 $ -- $ -- -------------------------------------------------------------------------------- Y $0.2040 $ -- $ -- -------------------------------------------------------------------------------- Index Definitions -------------------------------------------------------------------------------- The Barclays High Yield Municipal Bond Index is an unmanaged measure of the performance of the high-yield municipal bond market. Index returns are calculated monthly, assume reinvestment of dividends and, unlike Fund returns, do not reflect any fees, expenses or sales charges. It is not possible to invest directly in an index. The index defined here pertains to the "Value of $10,000 Investment" and "Value of $5 Million Investment" charts shown on pages 10-12. Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 9 Performance Update | 2/29/16 Class A Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Class A shares of Pioneer High Income Municipal Fund at public offering price during the periods shown, compared to that of the Barclays High Yield Municipal Bond Index. Average Annual Total Returns (As of February 29, 2016) -------------------------------------------------------------------------------- Barclays Net Public High Yield Asset Offering Municipal Value Price Bond Period (NAV) (POP) Index -------------------------------------------------------------------------------- Life of Class (10/17/06) 3.05% 2.55% 4.33% 5 Years 6.07 5.09 7.51 1 Year 4.79 0.08 2.11 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated December 31, 2015) -------------------------------------------------------------------------------- Gross -------------------------------------------------------------------------------- 0.89% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer High Income Barclays High Yield Municipal Fund Municipal Bond Index 10/06 $ 9,550 $10,000 2/07 $ 9,909 $10,270 2/08 $ 8,948 $ 9,569 2/09 $ 6,836 $ 7,805 2/10 $ 9,095 $ 9,878 2/11 $ 9,397 $10,337 2/12 $ 9,947 $11,800 2/13 $11,716 $13,498 2/14 $10,896 $13,282 2/15 $12,043 $14,541 2/16 $12,620 $14,847 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. NAV results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. POP returns reflect deduction of maximum 4.50% sales charge. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. 10 Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 Performance Update | 2/29/16 Class C Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Class C shares of Pioneer High Income Municipal Fund during the periods shown, compared to that of the Barclays High Yield Municipal Bond Index. Average Annual Total Returns (As of February 29, 2016) -------------------------------------------------------------------------------- Barclays High Yield Municipal If If Bond Period Held Redeemed Index -------------------------------------------------------------------------------- Life of Class (10/17/06) 2.22% 2.22% 4.33% 5 Years 5.28 5.28 7.51 1 Year 4.00 4.00 2.11 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated December 31, 2015) -------------------------------------------------------------------------------- Gross -------------------------------------------------------------------------------- 1.65% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer High Income Barclays High Yield Municipal Fund Municipal Bond Index 10/06 $10,000 $10,000 2/07 $10,329 $10,270 2/08 $ 9,219 $ 9,569 2/09 $ 6,990 $ 7,805 2/10 $ 9,217 $ 9,878 2/11 $ 9,471 $10,337 2/12 $ 9,951 $11,800 2/13 $11,635 $13,498 2/14 $10,725 $13,282 2/15 $11,780 $14,541 2/16 $12,252 $14,847 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Class C shares held for less than one year are also subject to a 1% contingent deferred sales charge (CDSC). "If Held" results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 11 Performance Update | 2/29/16 Class Y Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $5 million investment made in Class Y shares of Pioneer High Income Municipal Fund during the periods shown, compared to that of the Barclays High Yield Municipal Bond Index. Average Annual Total Returns (As of February 29, 2016) -------------------------------------------------------------------------------- Barclays Net High Yield Asset Municipal Value Bond Period (NAV) Index -------------------------------------------------------------------------------- Life of Class (10/17/06) 3.04% 4.33% 5 Years 6.23 7.51 1 Year 4.97 2.11 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated December 31, 2015) -------------------------------------------------------------------------------- Gross -------------------------------------------------------------------------------- 0.71% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $5 Million Investment Pioneer High Income Barclays High Yield Municipal Fund Municipal Bond Index 10/06 $5,000,000 $5,000,000 2/07 $5,187,054 $5,135,163 2/08 $4,644,235 $4,784,639 2/09 $3,552,200 $3,902,577 2/10 $4,701,409 $4,939,057 2/11 $4,880,716 $5,168,354 2/12 $5,170,926 $5,900,058 2/13 $6,097,347 $6,748,911 2/14 $5,677,689 $6,641,049 2/15 $6,289,167 $7,270,605 2/16 $6,601,824 $7,423,707 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Class Y shares are not subject to sales charges and are available for limited groups of eligible investors, including institutional investors. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. 12 Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 Comparing Ongoing Fund Expenses As a shareowner in the Fund, you incur two types of costs: (1) ongoing costs, including management fees, distribution and/or service (12b-1) fees, and other Fund expenses; and (2) transaction costs, including sales charges (loads) on purchase payments. This example is intended to help you understand your ongoing expenses (in dollars) of investing in the Fund and to compare these costs with the ongoing costs of investing in other mutual funds. The example is based on an investment of $1,000 at the beginning of the Fund's latest six-month period and held throughout the six months. Using the Tables -------------------------------------------------------------------------------- Actual Expenses The first table below provides information about actual account values and actual expenses. You may use the information in this table, together with the amount you invested, to estimate the expenses that you paid over the period as follows: 1. Divide your account value by $1,000 Example: an $8,600 account value (divided by) $1,000 = 8.6 2. Multiply the result in (1) above by the corresponding share class's number in the third row under the heading entitled "Expenses Paid During Period" to estimate the expenses you paid on your account during this period. Expenses Paid on a $1,000 Investment in Pioneer High Income Municipal Fund Based on actual returns from September 1, 2015, through February 29, 2016. -------------------------------------------------------------------------------- Share Class A C Y -------------------------------------------------------------------------------- Beginning Account $1,000.00 $1,000.00 $1,000.00 Value on 9/1/15 -------------------------------------------------------------------------------- Ending Account Value $1,049.00 $1,046.40 $1,051.70 (after expenses) on 2/29/16 -------------------------------------------------------------------------------- Expenses Paid $ 4.43 $ 8.29 $ 3.57 During Period* -------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized net expense ratio of 0.87%, 1.63% and 0.70% for Class A, Class C and Class Y shares, respectively, multiplied by the average account value over the period, multiplied by 182/366 (to reflect the one-half year period). Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 13 Hypothetical Example for Comparison Purposes The table below provides information about hypothetical account values and hypothetical expenses based on the Fund's actual expense ratio and an assumed rate of return of 5% per year before expenses, which is not the Fund's actual return. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in the Fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds. Please note that the expenses shown in the tables are meant to highlight your ongoing costs only and do not reflect any transaction costs, such as sales charges (loads) that are charged at the time of the transaction. Therefore, the table below is useful in comparing ongoing costs only and will not help you determine the relative total costs of owning different funds. In addition, if these transaction costs were included, your costs would have been higher. Expenses Paid on a $1,000 Investment in Pioneer High Income Municipal Fund Based on a hypothetical 5% return per year before expenses, reflecting the period from September 1, 2015, through February 29, 2016. -------------------------------------------------------------------------------- Share Class A C Y -------------------------------------------------------------------------------- Beginning Account $1,000.00 $1,000.00 $1,000.00 Value on 9/1/15 -------------------------------------------------------------------------------- Ending Account Value $1,020.54 $1,016.76 $1,021.38 (after expenses) on 2/29/16 -------------------------------------------------------------------------------- Expenses Paid $ 4.37 $ 8.17 $ 3.52 During Period* -------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized net expense ratio of 0.87%, 1.63% and 0.70% for Class A, Class C and Class Y shares, respectively, multiplied by the average account value over the period, multiplied by 182/366 (to reflect the one-half year period). 14 Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 Schedule of Investments | 2/29/16 (unaudited) ----------------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value ----------------------------------------------------------------------------------------------------------- MUNICIPAL BONDS -- 96.2% (e) Alaska -- 0.6% 3,700,000 Northern Tobacco Securitization Corp., 5.0%, 6/1/46 $ 3,144,815 ----------------------------------------------------------------------------------------------------------- Arizona -- 1.0% 1,000,000 The Industrial Development Authority of the County of Pima, Desert hights Charter, 7.0%, 5/1/34 $ 1,076,440 3,000,000 The Industrial Development Authority of the County of Pima, Desert hights Charter, 7.25%, 5/1/44 3,251,190 725,000 The Industrial Development Authority of the County of Pima, Legacy Traditional School Project, 8.5%, 7/1/39 (Pre-Refunded) 883,688 490,000 The Industrial Development Authority of the County of Pima, Paradise Education Center, 6.0%, 6/1/40 509,428 --------------- $ 5,720,746 ----------------------------------------------------------------------------------------------------------- California -- 12.5% 1,215,000 California County Tobacco Securitization Agency, 6/1/36 $ 1,217,029 30,000 California County Tobacco Securitization Agency, Merced County, 5.125%, 6/1/38 28,563 5,770,000 California County Tobacco Securitization Agency, Merced County, 5.25%, 6/1/45 5,440,995 5,040,000 California County Tobacco Securitization Agency, Sonoma County Corp., 5.125%, 6/1/38 4,932,194 2,270,000 California County Tobacco Securitization Agency, Sonoma County Corp., 5.25%, 6/1/45 2,213,500 1,300,000 California Municipal Finance Authority, John Adams Academics Project, 5.25%, 10/1/45 1,323,322 6,300,000 California Municipal Finance Authority, Santa Rosa Academy Project Ser A, 6.0%, 7/1/42 6,747,552 500,000 California Municipal Finance Authority, Santa Rosa Academy Project, 5.125%, 7/1/35 521,840 1,575,000 California Municipal Finance Authority, Santa Rosa Academy Project, 5.375%, 7/1/45 1,644,221 1,000,000 California School Finance Authority, 6.0%, View Park Elementary and Middle School, 10/1/49 1,078,720 3,000,000 California School Finance Authority, 7.375%, Classical Academies Project, 10/1/43 3,557,370 3,230,000 California School Finance Authority, ICEF View Park High School, 7.125%, 10/1/48 3,729,552 830,000 California School Finance Authority, View Park Elementary and Middle School, 5.625%, 10/1/34 886,730 1,475,000 California School Finance Authority, View Park Elementary and Middle School, 5.875%, 10/1/44 1,583,855 1,560,000 California Statewide Communities Development Authority, California Baptist University, 6.125%, 11/1/33 1,718,574 The accompanying notes are an integral part of these financial statements. Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 15 Schedule of Investments | 2/29/16 (unaudited) (continued) ----------------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value ----------------------------------------------------------------------------------------------------------- California -- (continued) 4,030,000 California Statewide Communities Development Authority, California Baptist University, 6.375%, 11/1/43 $ 4,464,394 2,000,000 California Statewide Communities Development Authority, Lancer Edl Student Housing Project, 7.5%, 6/1/42 2,194,860 315,559 California Statewide Communities Development Authority, Microgy Holdings Project, 9.0%, 12/1/38 (c) 3 2,000,000 Golden State Tobacco Securitization Corp., 5.125%, 6/1/47 1,782,380 11,000,000 Golden State Tobacco Securitization Corp., 5.75%, 6/1/47 10,560,330 5,310,000 Golden State Tobacco Securitization Corp., 6/1/37 4,981,364 20,000,000 Inland Empire Tobacco Securitization Authority, 6/1/47 (d) 1,641,600 2,500,000 Pittsburg Unified School District, 9/1/41 (AGM CNTY GTD) (d) 853,700 1,925,000 Pittsburg Unified School District, 9/1/42 (AGM CNTY GTD) (d) 630,264 2,000,000 River Islands Public Financing Authority, 5.5%, 9/1/45 2,173,480 4,275,000 Tobacco Securitization Authority of Southern California, 5.0%, 6/1/37 4,039,362 270,000 Tobacco Securitization Authority of Southern California, 5.125%, 6/1/46 255,817 --------------- $ 70,201,571 ----------------------------------------------------------------------------------------------------------- Colorado -- 3.7% 2,860,000 Castle Oaks Metropolitan District No 3, 6.25%, 12/1/44 (f) $ 2,891,145 1,000,000 Colorado Educational & Cultural Facilities Authority, 5.0%, 12/15/45 999,930 2,000,000 Colorado Educational & Cultural Facilities Authority, Charter School Rocky Mountain Classical, 8.0%, 9/1/43 2,112,840 5,000,000 Colorado Educational & Cultural Facilities Authority, Charter School Rocky Mountain Classical, 8.125%, 9/1/48 5,303,150 2,000,000 Copperleaf Metropolitan District No 2, 5.75%, 12/1/45 (f) 2,100,140 2,840,000 Crystal Crossing Metropolitan District, 5.25%, 12/1/40 (f) 2,831,963 1,700,000 Littleton Village Metropolitan District No 2, 5.375%, 12/1/45 (f) 1,716,048 1,500,000 Promenade Castle Rock Metropolitan District No 1, 5.75%, 12/1/39 (f) 1,550,910 1,000,000 Sterling Ranch Community Authority Board, 5.75%, 12/1/45 (MUN GOVT GTD) 1,004,490 --------------- $ 20,510,616 ----------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 16 Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 ----------------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value ----------------------------------------------------------------------------------------------------------- Connecticut -- 0.5% 2,640,000 Town of Hamden Connecticut, Whitney Center Project, 7.75%, 1/1/43 $ 2,755,632 ----------------------------------------------------------------------------------------------------------- District of Columbia -- 0.8% 735,000 District of Columbia Tobacco Settlement Financing Corp., 6.75%, 5/15/40 $ 738,771 4,000,000 District of Columbia, Provident Group Howard Properties, 5.0%, 10/1/45 3,927,080 --------------- $ 4,665,851 ----------------------------------------------------------------------------------------------------------- Florida -- 1.9% 5,000,000 Alachua County Health Facilities Authority, Terraces Bonita Springs Project, 8.125%, 11/15/46 $ 5,909,700 1,820,000 County of Liberty Florida, 8.25%, 7/1/28 (c) 270,725 1,000,000 Florida Development Finance Corp., Tuscan Isle Obligated Group, 7.0%, 6/1/35 1,041,280 3,000,000 Florida Development Finance Corp., Tuscan Isle Obligated Group, 7.0%, 6/1/45 3,125,550 --------------- $ 10,347,255 ----------------------------------------------------------------------------------------------------------- Hawaii -- 0.2% 1,000,000 State of Hawaii Department of Budget & Finance, 15 Craigside Project, 9.0%, 11/15/44 $ 1,234,870 ----------------------------------------------------------------------------------------------------------- Illinois -- 3.6% 4,213,653 4.00 Illinois Finance Authority, Clare Oaks Project Series B, Floating Rate Note, 11/15/52 $ 2,966,412 2,634,795 Illinois Finance Authority, Clare Oaks Project Series C1, 11/15/52 (d) 94,536 526,959 Illinois Finance Authority, Clare Oaks Project Series C2, 11/15/52 (d) 143,797 526,959 Illinois Finance Authority, Clare Oaks Project Series C3, 11/15/52 (d) 90,510 1,250,000 Illinois Finance Authority, Norwegian American Hospital, 7.625%, 9/15/28 1,379,875 4,845,000 Illinois Finance Authority, Norwegian American Hospital, 7.75%, 9/15/38 5,624,657 485,000 Southwestern Illinois Development Authority, Comprehensive Mental Health Center, 6.2%, 6/1/17 492,978 7,020,000 Southwestern Illinois Development Authority, Comprehensive Mental Health Center, 6.625%, 6/1/37 7,187,708 2,350,000 Southwestern Illinois Development Authority, Village of Sauget Project, 5.625%, 11/1/26 2,184,889 --------------- $ 20,165,362 ----------------------------------------------------------------------------------------------------------- Indiana -- 2.7% 1,750,000 City of Carmel Indiana, Barrington Carmel Project Series A, 7.0%, 11/15/32 $ 1,969,572 The accompanying notes are an integral part of these financial statements. Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 17 Schedule of Investments | 2/29/16 (unaudited) (continued) ----------------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value ----------------------------------------------------------------------------------------------------------- Indiana -- (continued) 2,000,000 City of Carmel Indiana, Barrington Carmel Project Series A, 7.125%, 11/15/42 $ 2,252,920 2,000,000 City of Carmel Indiana, Barrington Carmel Project Series A, 7.125%, 11/15/47 2,246,840 3,500,000 City of Crown Point Indiana, Wittenberg Village Project, 8.0%, 11/15/39 3,917,830 4,000,000 Hospital Authority of Vigo County, Union Hospital, Inc., 8.0%, 9/1/41 4,777,080 --------------- $ 15,164,242 ----------------------------------------------------------------------------------------------------------- Iowa -- 2.0% 2,285,000 Iowa Tobacco Settlement Authority, 5.5%, 6/1/42 $ 2,241,219 5,290,000 Iowa Tobacco Settlement Authority, 5.6%, 6/1/34 5,292,010 3,705,000 Iowa Tobacco Settlement Authority, 5.625%, 6/1/46 3,690,217 --------------- $ 11,223,446 ----------------------------------------------------------------------------------------------------------- Louisiana -- 0.6% 5,800,000 Tensas Parish Law Enforcement District, 10/1/26 (c) (d) $ 3,477,796 ----------------------------------------------------------------------------------------------------------- Maryland -- 0.2% 1,000,000 Maryland Health & Higher Educational Facilities Authority, City Neighbors Series A, 6.75%, 7/1/44 $ 1,091,250 ----------------------------------------------------------------------------------------------------------- Massachusetts -- 1.9% 3,954,928 Massachusetts Development Finance Agency, 5.5%, Linden Ponds, Inc., 11/15/46 $ 3,398,865 2,000,000 Massachusetts Development Finance Agency, Adventcare Project Series A, 6.75%, 10/15/37 2,070,840 845,000 Massachusetts Development Finance Agency, Adventcare Project, 7.625%, 10/15/37 942,386 1,235,770 Massachusetts Development Finance Agency, Linden Ponds, Inc., Series A-1, 6.25%, 11/15/26 1,210,190 3,340,294 Massachusetts Development Finance Agency, Linden Ponds, Inc., Series A-1, 6.25%, 11/15/39 3,239,985 1,116,746 Massachusetts Development Finance Agency, Linden Ponds, Inc., Series B, 11/15/56 (d) 6,466 3,500,000 Massachusetts Health & Educational Facilities Authority, Quincy Medical Center, 1/15/38 (c) (d) 8,540 --------------- $ 10,877,272 ----------------------------------------------------------------------------------------------------------- Michigan -- 7.0% 1,250,000 Flint Hospital Building Authority, Hurley Medical Center Series A, 5.25%, 7/1/39 $ 1,256,712 1,250,000 Flint Hospital Building Authority, Hurley Medical Center, 7.375%, 7/1/35 1,426,038 5,485,000 Flint International Academy, 5.75%, 10/1/37 5,535,956 The accompanying notes are an integral part of these financial statements. 18 Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 ----------------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value ----------------------------------------------------------------------------------------------------------- Michigan -- (continued) 185,000 Michigan Public Educational Facilities Authority, Dr. Joseph Pollack, 7.25%, 4/1/20 $ 195,660 2,020,000 Michigan Public Educational Facilities Authority, Dr. Joseph Pollack, 8.0%, 4/1/40 2,138,938 4,410,000 Michigan Public Educational Facilities Authority, Ltd Oblig-David Ellis-West Project, 5.875%, 6/1/37 4,425,391 7,135,000 6.75 Michigan Strategic Fund, CFP Michigan Dept Offices Lease B, Floating Rate Note, 3/1/40 7,669,340 4,000,000 6.62 Michigan Strategic Fund, Floating Rate Note, 11/1/41 4,214,880 750,000 Michigan Tobacco Settlement Finance Authority, 6.0%, 6/1/34 706,350 11,320,000 Michigan Tobacco Settlement Finance Authority, 6.0%, 6/1/48 10,234,525 1,250,000 Michigan Tobacco Settlement Finance Authority, 6.875%, 6/1/42 1,283,988 --------------- $ 39,087,778 ----------------------------------------------------------------------------------------------------------- Minnesota -- 1.1% 2,000,000 Bloomington Port Authority, Radisson Blu MOA LLC, 9.0%, 12/1/35 $ 2,290,860 1,500,000 City of Brooklyn Park Minnesota, Prairie Seeds Academy Project Series A, 9.25%, 3/1/39 (Pre-Refunded) 1,658,715 500,000 City of Deephaven Minnesota, Eagle Ridge Academy Project, 5.25%, 7/1/37 518,645 1,500,000 City of Deephaven Minnesota, Eagle Ridge Academy Project, 5.5%, 7/1/50 1,546,275 --------------- $ 6,014,495 ----------------------------------------------------------------------------------------------------------- Missouri -- 1.6% 5,645,000 Community Memorial Hospital District, 6.68%, 12/1/34 $ 5,909,073 2,500,000 Kirkwood Industrial Development Authority, Aberdeen Hrights Series A, 8.25%, 5/15/45 2,820,575 --------------- $ 8,729,648 ----------------------------------------------------------------------------------------------------------- New Jersey -- 4.2% 5,500,000 New Jersey Economic Development Authority, Gloucester Marine Project, 6.625%, 1/1/37 $ 5,500,000 4,500,000 New Jersey Health Care Facilities Financing Authority, St. Peters University Hospital, 6.25%, 7/1/35 4,869,720 6,580,000 Tobacco Settlement Financing Corp. New Jersey, 4.75%, 6/1/34 5,609,384 9,000,000 Tobacco Settlement Financing Corp. New Jersey, 5.0%, 6/1/41 7,721,730 --------------- $ 23,700,834 ----------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 19 Schedule of Investments | 2/29/16 (unaudited) (continued) ----------------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value ----------------------------------------------------------------------------------------------------------- New Mexico -- 1.3% 35,000 County of Otero New Mexico, 6.0%, 4/1/23 $ 35,813 7,075,000 County of Otero New Mexico, 6.0%, 4/1/28 7,175,040 --------------- $ 7,210,853 ----------------------------------------------------------------------------------------------------------- New York -- 5.5% 210,000 Erie Tobacco Asset Securitization Corp., 5.0%, 6/1/38 $ 207,209 25,000 New York Counties Tobacco Trust IV, 5.0%, 6/1/42 23,044 2,405,000 New York Counties Tobacco Trust IV, 5.0%, 6/1/45 2,175,972 10,000,000 New York Counties Tobacco Trust V%, 6/1/38 (d) 2,547,400 8,030,000 Suffolk Tobacco Asset Securitization Corp., 6.0%, 6/1/48 7,848,924 8,000,000 Suffolk Tobacco Asset Securitization Corp., 6/1/44 8,086,880 10,000,000 The Erie County Industrial Development Agency, Galvstar LLC Project Series A, 10/1/30 (c) (d) 2,524,600 8,000,000 The Erie County Industrial Development Agency, Galvstar LLC Project Series B, 10/1/30 (c) (d) 2,037,760 1,795,000 The Erie County Industrial Development Agency, Galvstar LLC Project Series C, 10/1/30 (c) (d) 457,222 115,000 TSASC, Inc. New York, 5.0%, 6/1/34 110,415 5,040,000 TSASC, Inc. New York, 5.125%, 6/1/42 4,605,199 --------------- $ 30,624,625 ----------------------------------------------------------------------------------------------------------- Ohio -- 6.6% 5,735,000 Buckeye Tobacco Settlement Financing Authority, 5.75%, 6/1/34 $ 5,133,112 9,350,000 Buckeye Tobacco Settlement Financing Authority, 5.875%, 6/1/47 8,368,811 8,555,000 Buckeye Tobacco Settlement Financing Authority, 6.0%, 6/1/42 7,652,533 6,335,000 Buckeye Tobacco Settlement Financing Authority, 6.5%, 6/1/47 6,097,121 1,150,000 County of Muskingum Ohio, Genesis Healthcare System Project, 5.0%, 2/15/33 1,204,303 5,000,000 County of Muskingum Ohio, Genesis Healthcare System Project, 5.0%, 2/15/48 5,134,250 2,900,000 Southeastern Ohio Port Authority, 6.0%, 12/1/42 3,223,872 --------------- $ 36,814,002 ----------------------------------------------------------------------------------------------------------- Pennsylvania -- 8.0% 680,000 Allegheny County Hospital Development Authority, Ohio Valley General Hospital Project A, 5.125%, 4/1/35 $ 680,061 3,000,000 Pennsylvania Economic Development Financing Authority, Northwestern Human Services Series A, 5.25%, 6/1/28 3,002,310 The accompanying notes are an integral part of these financial statements. 20 Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 ----------------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value ----------------------------------------------------------------------------------------------------------- Pennsylvania -- (continued) 2,005,000 Pennsylvania Economic Development Financing Authority, US Airways Group Series A, 7.5%, 5/1/20 $ 2,296,908 8,445,000 Pennsylvania Economic Development Financing Authority, US Airways Group Series B, 8.0%, 5/1/29 9,914,852 2,200,000 Philadelphia Authority for Industrial Development, 6.5%, 6/1/45 2,223,320 3,145,000 Philadelphia Authority for Industrial Development, 6.625%, 6/1/50 3,180,318 2,500,000 Philadelphia Authority for Industrial Development, Green Woods Charter School Projects A, 5.5%, 6/15/32 2,634,125 5,200,000 Philadelphia Authority for Industrial Development, Green Woods Charter School Projects A, 5.75%, 6/15/42 5,494,112 6,000,000 Philadelphia Authority for Industrial Development, Nueva Esperanze Inc., 8.2%, 12/1/43 6,908,640 1,000,000 Philadelphia Authority for Industrial Development, Performing Arts Charter School Project, 6.5%, 6/15/33 (144A) 1,065,580 3,000,000 Philadelphia Authority for Industrial Development, Performing Arts Charter School Project, 6.75%, 6/15/43 (144A) 3,206,310 4,000,000 The Hospitals & Higher Education Facilities Authority of Philadelphia, Temple University Health System Series A, 5.625%, 7/1/42 4,300,280 --------------- $ 44,906,816 ----------------------------------------------------------------------------------------------------------- Puerto Rico -- 2.3% 18,000,000 Commonwealth of Puerto Rico, 8.0%, 7/1/35 (f) $ 12,983,040 ----------------------------------------------------------------------------------------------------------- Rhode Island -- 0.1% 2,065,000 Central Falls Detention Facility Corp., 7.25%, 7/15/35 (c) $ 513,875 ----------------------------------------------------------------------------------------------------------- Tennessee -- 0.0%+ 5,000 Johnson City Health & Educational Facilities Board, Appalachian Christian Village, 5.0%, 2/15/43 $ 5,196 ----------------------------------------------------------------------------------------------------------- Texas -- 9.6% 5,500,000 Arlington Higher Education Finance Corp., Universal Academy Series A, 7.125%, 3/1/44 $ 5,813,665 400,000 City of Celina Texas, 5.375%, 9/1/28 399,636 1,000,000 City of Celina Texas, 5.5%, 9/1/24 999,320 250,000 City of Celina Texas, 5.5%, 9/1/32 249,730 650,000 City of Celina Texas, 5.875%, 9/1/40 649,162 1,075,000 City of Celina Texas, 6.0%, 9/1/30 1,073,968 2,700,000 City of Celina Texas, 6.25%, 9/1/40 2,696,625 The accompanying notes are an integral part of these financial statements. Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 21 Schedule of Investments | 2/29/16 (unaudited) (continued) ----------------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value ----------------------------------------------------------------------------------------------------------- Texas -- (continued) 500,000 City of Mclendon-Chisholm Texas, Sonoma Public Impt Dist Phase, 5.125%, 9/15/28 $ 502,470 450,000 City of Mclendon-Chisholm Texas, Sonoma Public Impt Dist Phase, 5.375%, 9/15/35 452,200 400,000 City of Mclendon-Chisholm Texas, Sonoma Public Impt Dist Phase, 5.5%, 9/15/40 401,948 234,442 Gulf Coast Industrial Development Authority, Microgy Holdings Project, 12/1/36 (c) (d) 2 1,300,000 Kinney County Public Facilities Corp., 7.0%, 11/1/25 1,184,326 2,000,000 La Vernia Higher Education Finance Corp., Meridian World School Series A, 5.5%, 8/15/45 2,031,020 17,350,000 Sanger Industrial Development Corp., Texas Pellets Project Series B, 8.0%, 7/1/38 16,655,482 2,250,000 Tarrant County Cultural Education Facilities Finance Corp., Mirador Project Series A, 8.0%, 11/15/29 1,926,315 5,000,000 Tarrant County Cultural Education Facilities Finance Corp., Mirador Project Series A, 8.125%, 11/15/39 4,280,200 120,000 Tarrant County Cultural Education Facilities Finance Corp., MRC Crestview Project, 8.0%, 11/15/34 137,914 6,350,000 Tarrant County Cultural Education Facilities Finance Corp., MRC Crestview Project, 8.125%, 11/15/44 7,284,847 1,775,000 Tarrant County Cultural Education Facilities Finance Corp., Stayton at Museum Way Series A, 8.0%, 11/15/28 1,787,620 5,000,000 Tarrant County Cultural Education Facilities Finance Corp., Stayton at Museum Way Series A, 8.25%, 11/15/44 5,046,900 1,000,000 Texas Midwest Public Facility Corp., Secure Treatment Facility Project, 10/1/30 (c) (d) 118,990 --------------- $ 53,692,340 ----------------------------------------------------------------------------------------------------------- Utah -- 1.7% 1,285,000 Utah Charter School Finance Authority, Summit Academy High School Series A, 7.25%, 5/15/21 $ 1,421,030 1,985,000 Utah Charter School Finance Authority, Summit Academy High School Series A, 8.125%, 5/15/31 2,251,188 5,145,000 Utah Charter School Finance Authority, Summit Academy High School Series A, 8.5%, 5/15/41 5,895,553 --------------- $ 9,567,771 ----------------------------------------------------------------------------------------------------------- Virginia -- 3.2% 2,100,000 Cherry Hill Community Development Authority, Potomac Shores Project, 5.4%, 3/1/45 $ 2,172,156 815,000 Embrey Mill Community Development Authority, 5.3%, 3/1/35 828,415 4,685,000 Embrey Mill Community Development Authority, 5.6%, 3/1/45 4,761,131 The accompanying notes are an integral part of these financial statements. 22 Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 ----------------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value ----------------------------------------------------------------------------------------------------------- Virginia -- (continued) 12,870,000 Tobacco Settlement Financing Corp. Virginia, 5.0%, 6/1/47 $ 10,226,502 --------------- $ 17,988,204 ----------------------------------------------------------------------------------------------------------- Washington -- 2.8% 3,500,000 Washington State Housing Finance Commission, Skyline at First Hill Project Series A, 5.625%, 1/1/27 $ 3,548,895 11,825,000 Washington State Housing Finance Commission, Skyline at First Hill Project Series A, 5.625%, 1/1/38 11,956,612 --------------- $ 15,505,507 ----------------------------------------------------------------------------------------------------------- West Virginia -- 3.7% 25,000,000 City of Philippi West Virginia, 7.75%, 10/1/44 (c) $ 15,000,500 5,340,000 West Virginia Hospital Finance Authority, Highland Hospital Oblig Group, 9.125%, 10/1/41 5,791,604 --------------- $ 20,792,104 ----------------------------------------------------------------------------------------------------------- Wisconsin -- 5.3% 8,615,000 Public Finance Authority, Cabs-Springshire Pre-Dev Project, 12/1/20 (144A) (d) $ 4,955,090 1,590,000 Public Finance Authority, Coral Academy Science Las Vegas, 5.625%, 7/1/44 1,699,440 5,325,000 Public Finance Authority, Glenridge Palmer Ranch Series A, 8.25%, 6/1/46 6,654,493 5,057,500 Public Finance Authority, Las Ventanas Retirement Community, 7.0%, 10/1/42 5,080,815 1,500,000 Public Finance Authority, Roseman University Health Sciences, 5.75%, 4/1/35 1,547,010 4,150,000 Public Finance Authority, Roseman University Health Sciences, 5.875%, 4/1/45 4,265,868 1,200,000 Public Finance Authority, Searstone CCRC Project Series B, 8.375%, 6/1/20 1,200,540 1,245,000 Public Finance Authority, Voyager Foundation Inc., Project Series A, 5.125%, 10/1/45 1,267,920 2,815,000 Public Finance Authority, Voyager Foundation Inc., Project Series A, 6.2%, 10/1/42 3,045,128 --------------- $ 29,716,304 ----------------------------------------------------------------------------------------------------------- TOTAL MUNICIPAL BONDS (Cost $533,142,922) $ 538,434,116 ----------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 23 Schedule of Investments | 2/29/16 (unaudited) (continued) ----------------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value ----------------------------------------------------------------------------------------------------------- MUNICIPAL COLLATERALIZED DEBT OBLIGATION -- 0.0%+ 1,175,000 0.00 Non-Profit Preferred Funding Trust I, Floating Rate Note, 9/15/37 (144A) $ 63,168 ----------------------------------------------------------------------------------------------------------- TOTAL MUNICIPAL COLLATERALIZED DEBT OBLIGATION (Cost $1,172,544) $ 63,168 ----------------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- 1.8% 10,000,000 U.S. Treasury Bills, 3/17/16 (d) $ 9,999,030 ----------------------------------------------------------------------------------------------------------- TOTAL U.S. GOVERNMENT AND AGENCY OBLIGATIONS (Cost $9,998,811) $ 9,999,030 ----------------------------------------------------------------------------------------------------------- TOTAL INVESTMENT IN SECURITIES -- 98.0% (Cost $544,314,277) (a) $ 548,496,314 ----------------------------------------------------------------------------------------------------------- OTHER ASSETS & LIABILITIES -- 2.0% $ 11,113,168 ----------------------------------------------------------------------------------------------------------- TOTAL NET ASSETS -- 100.0% $ 559,609,482 =========================================================================================================== + Amount rounds to less than 0.01%. (144A) Security is exempt from registration under Rule 144A of the Securities Act of 1933. Such securities may be resold normally to qualified institutional buyers in a transaction exempt from registration. At February 29, 2016, the value of these securities amounted to $9,290,148 or 1.7% of total net assets. (Pre-Refunded) Pre-Refunded bonds have been collateralized by U.S. Treasury securities which are held in escrow and used to pay principal and interest on the tax-exempt issue and to retire the bonds in full at the earliest refunding date. (a) At February 29, 2016, the net unrealized appreciation on investments based on cost for federal income tax purposes of $544,222,793 was as follows: Aggregate gross unrealized appreciation for all investments in which there is an excess of value over tax cost $ 43,631,765 Aggregate gross unrealized depreciation for all investments in which there is an excess of tax cost over value (39,358,244) ------------ Net unrealized appreciation $ 4,273,521 ============ (b) Debt obligation with a variable interest rate. Rate shown is rate at end of period. (c) Security is in default. (d) Security issued with a zero coupon. Income is earned through accretion of discount. (e) Consists of Revenue Bonds unless otherwise indicated. (f) Represents a General Obligation bond. Purchases and sales of securities (excluding temporary cash investments) for the six months ended February 29, 2016, aggregated $75,777,573 and $52,718,333, respectively. The accompanying notes are an integral part of these financial statements. 24 Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 Various inputs are used in determining the value of the Fund's investments. These inputs are summarized in the three broad levels listed below. Level 1 - quoted prices in active markets for identical securities. Level 2 - other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.) See Notes to Financial Statements -- Note 1A. Level 3 - significant unobservable inputs (including the Fund's own assumptions in determining fair value of investments) See Notes to Financial Statements -- Note 1A. The following is a summary of the inputs used as of February 29, 2016, in valuing the Fund's investments: ------------------------------------------------------------------------------------------------- Level 1 Level 2 Level 3 Total ------------------------------------------------------------------------------------------------- Municipal Bonds $ -- $ 538,434,116 $ -- $ 538,434,116 Municipal Collateralized Debt Obligation -- 63,168 -- 63,168 U.S. Government and Agency Obligations -- 9,999,030 -- 9,999,030 ------------------------------------------------------------------------------------------------- Total $ -- $ 548,496,314 $ -- $ 548,496,314 ================================================================================================= During the six months ended February 29, 2016, there were no transfers between Levels 1, 2 and 3. The accompanying notes are an integral part of these financial statements. Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 25 Statement of Assets and Liabilities | 2/29/16 (unaudited) ASSETS: Investment in securities, at value (cost $544,314,277) $548,496,314 Cash 3,399,480 Receivables -- Investment securities sold 40,000 Fund shares sold 1,916,687 Interest 9,140,460 Other Assets 35,541 -------------------------------------------------------------------------------- Total assets $563,028,482 ================================================================================ LIABILITIES: Payables -- Fund shares repurchased $ 2,695,587 Dividends 479,203 Trustee fees 3,405 Due to affiliates 119,347 Accrued expenses 121,458 -------------------------------------------------------------------------------- Total liabilities $ 3,419,000 ================================================================================ NET ASSETS: Paid-in capital $604,130,766 Undistributed net investment income 7,909,220 Accumulated net realized loss on investments (56,612,541) Net unrealized appreciation on investments 4,182,037 -------------------------------------------------------------------------------- Total net assets $559,609,482 ================================================================================ NET ASSET VALUE PER SHARE: (No par value, unlimited number of shares authorized) Class A (based on $257,108,891/34,866,196 shares) $ 7.37 Class C (based on $153,788,626/20,852,410 shares) $ 7.38 Class Y (based on $148,711,965/20,432,656 shares) $ 7.28 MAXIMUM OFFERING PRICE: Class A ($7.37 (divided by) 95.5%) $ 7.72 ================================================================================ The accompanying notes are an integral part of these financial statements. 26 Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 Statement of Operations (unaudited) For the Six Months Ended 2/29/16 INVESTMENT INCOME: Interest $15,691,296 ------------------------------------------------------------------------------------------------ Total investment income $15,691,296 ------------------------------------------------------------------------------------------------ EXPENSES: Management fees $ 1,329,574 Transfer agent fees Class A 7,659 Class C 3,491 Class Y 2,594 Distribution fees Class A 312,074 Class C 744,242 Shareholder communications expense 163,988 Administrative expense 89,262 Custodian fees 3,630 Registration fees 25,370 Professional fees 37,501 Printing expense 5,867 Fees and expenses of nonaffiliated Trustees 9,950 Miscellaneous 32,548 ------------------------------------------------------------------------------------------------ Total expenses $ 2,767,750 ------------------------------------------------------------------------------------------------ Net investment income $12,923,546 ------------------------------------------------------------------------------------------------ REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS: Net realized gain (loss) on investments $ 3,713,953 ------------------------------------------------------------------------------------------------ Change in net unrealized appreciation (depreciation) on investments $ 9,045,469 ------------------------------------------------------------------------------------------------ Net realized and unrealized gain (loss) on investments $12,759,422 ------------------------------------------------------------------------------------------------ Net increase in net assets resulting from operations $25,682,968 ================================================================================================ The accompanying notes are an integral part of these financial statements. Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 27 Statements of Changes in Net Assets ------------------------------------------------------------------------------------------ Six Months Ended 2/29/16 Year Ended (unaudited) 8/31/15 ------------------------------------------------------------------------------------------ FROM OPERATIONS: Net investment income (loss) $ 12,923,546 $ 27,796,505 Net realized gain (loss) on investments 3,713,953 (6,679,877) Change in net unrealized appreciation (depreciation) on investments 9,045,469 875,019 ------------------------------------------------------------------------------------------ Net increase in net assets resulting from operations $ 25,682,968 $ 21,991,647 ------------------------------------------------------------------------------------------ DISTRIBUTIONS TO SHAREOWNERS: Net investment income: Class A ($0.20 and $0.40 per share, respectively) $ (6,869,242) $ (13,393,020) Class C ($0.17 and $0.35 per share, respectively) (3,524,291) (7,010,653) Class Y ($0.20 and $0.41 per share, respectively) (3,841,261) (6,591,060) ------------------------------------------------------------------------------------------ Total distributions to shareowners $ (14,234,794) $ (26,994,733) ------------------------------------------------------------------------------------------ FROM FUND SHARE TRANSACTIONS: Net proceeds from sale of shares $ 93,238,195 $ 169,528,293 Reinvestment of distributions 11,442,862 22,079,945 Cost of shares repurchased (76,627,467) (156,480,079) ------------------------------------------------------------------------------------------ Net increase (decrease) in net assets resulting from Fund share transactions $ 28,053,590 $ 35,128,159 ------------------------------------------------------------------------------------------ Net increase (decrease) in net assets $ 39,501,764 $ 30,125,073 NET ASSETS: Beginning of period $ 520,107,718 $ 489,982,645 ------------------------------------------------------------------------------------------ End of period $ 559,609,482 $ 520,107,718 ------------------------------------------------------------------------------------------ Undistributed net investment income $ 7,909,220 $ 9,220,468 ========================================================================================= The accompanying notes are an integral part of these financial statements. 28 Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 ---------------------------------------------------------------------------------------- Six Months Six Months Ended Ended 2/29/16 2/29/16 Year Ended Year Ended Shares Amount 8/31/15 8/31/15 (unaudited) (unaudited) Shares Amount ---------------------------------------------------------------------------------------- Class A Shares sold 5,111,312 $ 37,384,954 11,663,809 $ 85,671,600 Reinvestment of distributions 809,664 5,925,563 1,603,795 11,756,863 Less shares repurchased (5,122,772) (37,444,738) (12,244,062) (89,616,434) ---------------------------------------------------------------------------------------- Net increase 798,204 $ 5,865,779 1,023,542 $ 7,812,029 ======================================================================================== Class C Shares sold 2,124,495 $ 15,532,188 3,106,826 $ 22,852,098 Reinvestment of distributions 386,233 2,827,702 775,852 5,689,573 Less shares repurchased (1,890,424) (13,811,337) (4,193,913) (30,726,011) ---------------------------------------------------------------------------------------- Net increase (decrease) 620,304 $ 4,548,553 (311,235) $ (2,184,340) ======================================================================================== Class Y Shares sold 5,579,162 $ 40,321,053 8,395,575 $ 61,004,595 Reinvestment of distributions 372,166 2,689,597 640,635 4,633,509 Less shares repurchased (3,514,050) (25,371,392) (4,995,290) (36,137,634) ---------------------------------------------------------------------------------------- Net increase 2,437,278 $ 17,639,258 4,040,920 $ 29,500,470 ======================================================================================== The accompanying notes are an integral part of these financial statements. Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 29 Financial Highlights -------------------------------------------------------------------------------------------------------------------------------- Six Months Ended Year Year Year Year Year 2/29/16 Ended Ended Ended Ended Ended (unaudited) 8/31/15 8/31/14 8/31/13 8/31/12 8/31/11 -------------------------------------------------------------------------------------------------------------------------------- Class A Net asset value, beginning of period $ 7.22 $ 7.27 $ 7.19 $ 7.94 $ 7.58 $ 7.97 -------------------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) $ 0.18(a) $ 0.41 $ 0.43 $ 0.53 $ 0.47 $ 0.53 Net realized and unrealized gain (loss) on investments 0.17 (0.06) 0.09 (0.84) 0.34 (0.40) -------------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 0.35 $ 0.35 $ 0.52 $ (0.31) $ 0.81 $ 0.13 -------------------------------------------------------------------------------------------------------------------------------- Distribution to shareowners: Net investment income $ (0.20) $ (0.40) $ (0.44) $ (0.44) $ (0.45) $ (0.52) -------------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 0.15 $ (0.05) $ 0.08 $ (0.75) $ 0.36 $ (0.39) -------------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 7.37 $ 7.22 $ 7.27 $ 7.19 $ 7.94 $ 7.58 ================================================================================================================================ Total return* 4.90% 4.88% 7.52% (4.26)% 11.24% 1.83% Ratio of net expenses to average net assets 0.87%** 0.89% 0.90% 0.88% 0.89% 0.88% Ratio of net investment income (loss) to average net assets 5.01%** 5.59% 5.97% 6.26% 6.25% 6.98% Portfolio turnover rate 20%** 29% 55% 17% 54% 65% Net assets, end of period (in thousands) $257,109 $245,877 $240,331 $250,163 $373,039 $378,883 ================================================================================================================================ (a) The per-share data presented above is based on the average shares outstanding for the period presented. * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period and no sales charges. Total return would be reduced if sales charges were taken into account. ** Annualized. The accompanying notes are an integral part of these financial statements. 30 Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 -------------------------------------------------------------------------------------------------------------------------------- Six Months Ended Year Year Year Year Year 2/29/16 Ended Ended Ended Ended Ended (unaudited) 8/31/15 8/31/14 8/31/13 8/31/12 8/31/11 -------------------------------------------------------------------------------------------------------------------------------- Class C Net asset value, beginning of period $ 7.22 $ 7.28 $ 7.19 $ 7.94 $ 7.58 $ 7.96 -------------------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) $ 0.15(a) $ 0.36 $ 0.41 $ 0.46 $ 0.41 $ 0.47 Net realized and unrealized gain (loss) on investments 0.18 (0.07) 0.07 (0.83) 0.35 (0.39) -------------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 0.33 $ 0.29 $ 0.48 $ (0.37) $ 0.76 $ 0.08 -------------------------------------------------------------------------------------------------------------------------------- Distribution to shareowners: Net investment income $ (0.17) $ (0.35) $ (0.39) $ (0.38) $ (0.40) $ (0.46) -------------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 0.16 $ (0.06) $ 0.09 $ (0.75) $ 0.36 $ (0.38) -------------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 7.38 $ 7.22 $ 7.28 $ 7.19 $ 7.94 $ 7.58 ================================================================================================================================ Total return* 4.64% 3.95% 6.85% (4.98)% 10.42% 1.19% Ratio of net expenses to average net assets 1.63%** 1.65% 1.66% 1.63% 1.63% 1.63% Ratio of net investment income (loss) to average net assets 4.25%** 4.83% 5.23% 5.53% 5.50% 6.24% Portfolio turnover rate 20%** 29% 55% 17% 54% 65% Net assets, end of period (in thousands) $153,789 $146,029 $149,453 $195,290 $265,448 $244,848 ================================================================================================================================ (a) The per-share data presented above is based on the average shares outstanding for the period presented. * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period and no sales charges. Total return would be reduced if sales charges were taken into account. ** Annualized. The accompanying notes are an integral part of these financial statements. Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 31 Financial Highlights (continued) -------------------------------------------------------------------------------------------------------------------------------- Six Months Ended Year Year Year Year Year 2/29/16 Ended Ended Ended Ended Ended (unaudited) 8/31/15 8/31/14 8/31/13 8/31/12 8/31/11 -------------------------------------------------------------------------------------------------------------------------------- Class Y Net asset value, beginning of period $ 7.12 $ 7.18 $ 7.10 $ 7.84 $ 7.49 $ 7.88 -------------------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) $ 0.19(a) $ 0.39 $ 0.46 $ 0.53 $ 0.48 $ 0.53 Net realized and unrealized gain (loss) on investments 0.17 (0.04) 0.07 (0.82) 0.33 (0.39) -------------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 0.36 $ 0.35 $ 0.53 $ (0.29) $ 0.81 $ 0.14 -------------------------------------------------------------------------------------------------------------------------------- Distribution to shareowners: Net investment income $ (0.20) $ (0.41) $ (0.45) $ (0.45) $ (0.46) $ (0.53) -------------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 0.16 $ (0.06) $ 0.08 $ (0.74) $ 0.35 $ (0.39) -------------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 7.28 $ 7.12 $ 7.18 $ 7.10 $ 7.84 $ 7.49 ================================================================================================================================ Total return* 5.17% 4.92% 7.69% (4.05)% 11.43% 2.02% Ratio of net expenses to average net assets 0.70%** 0.71% 0.71% 0.72% 0.67% 0.67% Ratio of net investment income (loss) to average net assets 5.18%** 5.77% 6.17% 6.40% 6.46% 7.21% Portfolio turnover rate 20%** 29% 55% 17% 54% 65% Net assets, end of period (in thousands) $148,712 $128,202 $100,199 $119,658 $176,664 $198,089 ================================================================================================================================ (a) The per-share data presented above is based on the average shares outstanding for the period presented. * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions and the complete redemption of the investment at net asset value at the end of each period. ** Annualized. The accompanying notes are an integral part of these financial statements. 32 Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 Notes to Financial Statements | 2/29/16 (unaudited) 1. Organization and Significant Accounting Policies Pioneer High Income Municipal Fund (the Fund) is one of five portfolios comprising Pioneer Series Trust V, a Delaware statutory trust. The Fund is registered under the Investment Company Act of 1940 as an open-end management investment company. The Fund is non-diversified. The investment objective of the Fund is to maximize total return through a combination of income that is exempt from regular federal income tax and capital appreciation. The Fund offers three classes of shares designated as Class A, Class C and Class Y shares. Each class of shares represents an interest in the same portfolio of investments of the Fund and has identical rights (based on relative net asset values) to assets and liquidation proceeds. Share classes can bear different rates of class-specific fees and expenses such as transfer agent and distribution fees. Differences in class-specific fees and expenses will result in differences in net investment income and, therefore, the payment of different dividends from net investment income earned by each class. The Amended and Restated Declaration of Trust of the Fund gives the Board of Trustees the flexibility to specify either per-share voting or dollar-weighted voting when submitting matters for shareholder approval. Under per-share voting, each share of a class of the Fund is entitled to one vote. Under dollar-weighted voting, a shareholder's voting power is determined not by the number of shares owned, but by the dollar value of the shares on the record date. Each share class has exclusive voting rights with respect to matters affecting only that class, including with respect to the distribution plan for that class. There is no distribution plan for Class Y shares. The Fund's financial statements have been prepared in conformity with U.S. generally accepted accounting principles that require the management of the Fund to, among other things, make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of income, expenses, and gain or loss on investments during the reporting period. Actual results could differ from those estimates. The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements: A. Security Valuation The net asset value of the Fund is computed once daily, on each day the New York Stock Exchange (NYSE) is open, as of the close of regular trading on the NYSE. Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 33 Fixed-income securities are valued by using prices supplied by independent pricing services, which consider such factors as market prices, market events, quotations from one or more brokers, Treasury spreads, yields, maturities and ratings, or may use a pricing matrix or other fair value methods or techniques to provide an estimated value of the security or instrument. A pricing matrix is a means of valuing a debt security on the basis of current market prices for other debt securities, historical trading patterns in the market for fixed-income securities and/or other factors. Valuations may be supplemented by dealers and other sources, as required. Non-U.S. debt securities that are listed on an exchange will be valued at the bid price obtained from an independent third party pricing service. Securities for which independent pricing services are unable to supply prices or for which market prices and/or quotations are not readily available or are considered to be unreliable are valued by a fair valuation team comprised of certain personnel of Pioneer Investment Management, Inc. (PIM), the Fund's investment adviser, pursuant to procedures adopted by the Fund's Board of Trustees. PIM's fair valuation team uses fair value methods approved by the Valuation Committee of the Board of Trustees. PIM's fair valuation team is responsible for monitoring developments that may impact fair valued securities and for discussing and assessing fair values on an ongoing basis, and at least quarterly, with the Valuation Committee of the Board of Trustees. Inputs used when applying fair value methods to value a security may include credit ratings, the financial condition of the company, current market conditions and comparable securities. The Fund may use fair value methods if it is determined that a significant event has occurred after the close of the exchange or market on which the security trades and prior to the determination of the Fund's net asset value. Examples of a significant event might include political or economic news, corporate restructurings, natural disasters, terrorist activity or trading halts. Thus, the valuation of the Fund's securities may differ significantly from exchange prices, and such differences could be material. At February 29, 2016, there were no securities that were valued using fair value methods (other than securities valued using prices supplied by independent pricing services or broker-dealers). B. Investment Income and Transactions Discount and premium on purchase prices of debt securities are accreted or amortized, respectively, daily into interest income on a yield-to-maturity basis over the life of the respective security with a corresponding increase or decrease in the cost basis of the security. Interest income, including interest on income-bearing cash accounts, is recorded on the accrual basis. 34 Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 Security transactions are recorded as of trade date. Gains and losses on sales of investments are calculated on the identified cost method for both financial reporting and federal income tax purposes. C. Federal Income Taxes It is the Fund's policy to comply with the requirements of the Internal Revenue Code applicable to regulated investment companies and to distribute all of its taxable income and net realized capital gains, if any, to its shareowners. Therefore, no provision for federal income taxes is required. As of August 31, 2015, the Fund did not accrue any interest or penalties with respect to uncertain tax positions, which, if applicable, would be recorded as an income tax expense in the Statement of Operations. Tax returns filed within the prior three years remain subject to examination by Federal and State tax authorities. The amount and character of income and capital gain distributions to shareowners are determined in accordance with federal income tax rules, which may differ from U.S. generally accepted accounting principles. Distributions in excess of net investment income or net realized gains are temporary overdistributions for financial statement purposes resulting from differences in the recognition or classification of income or distributions for financial statement and tax purposes. Capital accounts within the financial statements are adjusted for permanent book/tax differences to reflect tax character, but are not adjusted for temporary differences. The tax character of current year distributions payable will be determined at the end of the current taxable year. The tax character of distributions during the year ended August 31, 2015, was as follows: --------------------------------------------------------------------------- 2015 --------------------------------------------------------------------------- Distributions paid from: Tax-exempt income $26,502,250 Ordinary income 492,483 --------------------------------------------------------------------------- Total $26,994,733 =========================================================================== The following shows the components of distributable earnings on a federal income tax-basis at August 31, 2015: --------------------------------------------------------------------------- 2015 --------------------------------------------------------------------------- Distributable earnings: Undistributed tax-exempt income $ 9,515,422 Capital loss carryforward (60,290,758) Current year dividend payable (422,174) Net unrealized depreciation (4,771,948) --------------------------------------------------------------------------- Total $(55,969,458) =========================================================================== Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 35 The difference between book-basis and tax-basis net unrealized depreciation is attributable to adjustments related to interest on defaulted bonds, the tax treatment of amortization and tax-basis adjustments on partnerships. D. Fund Shares The Fund records sales and repurchases of its shares as of trade date. Pioneer Funds Distributor, Inc. (PFD), the principal underwriter for the Fund and a wholly owned indirect subsidiary of UniCredit S.p.A. (UniCredit), earned $42,885 in underwriting commissions on the sale of Class A shares during the six months ended February 29, 2016. E. Class Allocations Income, common expenses and realized and unrealized gains and losses are calculated at the Fund level and allocated daily to each class of shares based on its respective percentage of adjusted net assets at the beginning of the day. Distribution fees are calculated based on the average daily net asset value attributable to Class A and Class C shares of the Fund, respectively (see Note 4). Class Y shares do not pay distribution fees. All expenses and fees paid to the Fund's transfer agent for its services are allocated among the classes of shares based on the number of accounts in each class and the ratable allocation of related out-of-pocket expenses (see Note 3). The Fund declares, as daily dividends, substantially all of its net investment income. All dividends are paid on a monthly basis. Short-term capital gain distributions, if any, may be declared with the daily dividends. Distributions to shareowners are recorded as of the ex-dividend date. Distributions paid by the Fund with respect to each class of shares are calculated in the same manner and at the same time, except that net investment income dividends to Class A, Class C, and Class Y shares can reflect different transfer agent and distribution expense rates. F. Risks The municipal bond market can be susceptible to unusual volatility, particularly for lower-rated and unrated securities. Liquidity can be reduced unpredictably in response to overall economic conditions or credit tightening. Municipal issuers may be adversely affected by rising health care costs, increasing unfunded pension liabilities, and by the phasing out of federal programs providing financial support. Unfavorable conditions and developments relating to projects financed with municipal securities can result in lower revenues to issuers of municipal securities, potentially resulting in defaults. Issuers often depend on revenues from these projects to make principal and interest payments. The value of municipal securities can also be adversely affected by changes in the financial condition of one or 36 Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 more individual municipal issuers or insurers of municipal issuers, regulatory and political developments, tax law changes or other legislative actions, and by uncertainties and public perceptions concerning these and other factors. Municipal securities may be more susceptible to downgrades or defaults during recessions or similar periods of economic stress. In recent periods, an increasing number of municipal issuers in the United States have defaulted on obligations and commenced insolvency proceedings. Financial difficulties of municipal issuers may continue or get worse. To the extent the Fund invests significantly in a single state, including California, Massachusetts and Texas, or in securities the payments on which are dependent upon a single project or source of revenues, or that relate to a sector or industry, including health care facilities, education, transportation, special revenues and pollution control, the Fund will be more susceptible to associated risks and developments. At times, the Fund's investments may represent industries or industry sectors that are interrelated or have common risks, making the Fund more susceptible to any economic, political, or regulatory developments or other risks affecting those industries and sectors. The Fund's prospectus contains unaudited information regarding the Fund's principal risks. Please refer to that document when considering the Fund's principal risks. 2. Management Agreement PIM, a wholly owned indirect subsidiary of UniCredit, manages the Fund's portfolio. Management fees are calculated daily at the annual rate equal to 0.50% of the Fund's average daily net assets up to $500 million; 0.475% of the next $500 million of the Fund's average daily net assets and 0.45% of the Fund's average daily net assets over $1 billion. For the six months ended February 29, 2016, the effective management fee (excluding waivers and/or assumption of expenses) was equivalent to 0.50% of the Fund's average daily net assets. PIM has contractually agreed to limit ordinary operating expenses (excluding taxes, commissions, interest and extraordinary expenses) of the Fund to the extent required to reduce Fund expenses to 0.90% of the average daily net assets attributable to Class A shares. Class C and Class Y shares do not have an expense limitation. This expense limitation is in effect through January 1, 2017, for Class A shares. There can be no assurance that PIM will extend the expense limitation agreement for a class of shares beyond the date referred to above. In addition, under the management and administration agreements, certain other services and costs, including accounting, regulatory reporting and insurance premiums, are paid by the Fund as administrative reimbursements. Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $31,578 in management fees, administrative costs and certain other reimbursements payable to PIM at February 29, 2016. Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 37 3. Transfer Agent Prior to November 2, 2015, Pioneer Investment Management Shareholder Services, Inc. (PIMSS), a wholly owned indirect subsidiary of UniCredit, provided substantially all transfer agent and shareowner services to the Fund at negotiated rates. Effective November 2, 2015, Boston Financial Data Services serves as the transfer agent to the Fund at negotiated rates. In addition, the Fund reimbursed the transfer agent for out-of-pocket expenses incurred by the transfer agent related to shareholder communications activities such as proxy and statement mailings, outgoing phone calls and omnibus relationship contracts. For the six months ended February 29, 2016, such out- of-pocket expenses by class of shares were as follows: -------------------------------------------------------------------------------- Shareholder Communications: -------------------------------------------------------------------------------- Class A $ 43,550 Class C 35,521 Class Y 84,917 -------------------------------------------------------------------------------- Total $163,988 ================================================================================ Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $63,940 in transfer agent fees and out-of-pocket reimbursements payable to PIMSS at February 29, 2016. 4. Distribution Plan The Fund has adopted a Distribution Plan pursuant to Rule 12b-1 of the Investment Company Act of 1940 with respect to its Class A and Class C shares. Pursuant to the Plan, the Fund pays PFD 0.25% of the average daily net assets attributable to Class A shares as compensation for personal services and/or account maintenance services or distribution services with regard to Class A shares. Pursuant to the Plan, the Fund also pays PFD 1.00% of the average daily net assets attributable to Class C shares. The fee for Class C shares consists of a 0.25% service fee and a 0.75% distribution fee paid as compensation for personal services and/or account maintenance services or distribution services with regard to Class C shares. Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $23,829 in distribution fees payable to PFD at February 29, 2016. In addition, redemptions of each class of shares (except Class Y shares) may be subject to a contingent deferred sales charge (CDSC). A CDSC of 1.00% may be imposed on redemptions of certain net asset value purchases of Class A shares within 12 months of purchase. Redemptions of Class C shares within 12 months of purchase are subject to a CDSC of 1.00%, based on the lower of cost or market value of shares being redeemed. Shares purchased as part of an exchange remain subject to any CDSC that applied to the original purchase of 38 Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 those shares. There is no CDSC for Class Y shares. Proceeds from the CDSCs are paid to PFD. For the six months ended February 29, 2016, CDSCs in the amount of $4,834 were paid to PFD. 5. Line of Credit Facility The Fund, along with certain other funds in the Pioneer Family of Funds (the Funds), participates in a committed, unsecured revolving line of credit facility. Borrowings are used solely for temporary or emergency purposes. The Fund may borrow up to the lesser of the amount available under the facility or the limits set for borrowing by the Fund's prospectus and the 1940 Act. The credit facility in effect until June 9, 2015, was in the amount of $215 million. For the period from June 9, 2015, to February 9, 2016, the facility was in the amount of $240 million. Effective February 10, 2016, the facility is in the amount of $220 million. Under such facility, depending on the type of loan, interest on borrowings is payable at the London Interbank Offered Rate (LIBOR) plus 0.85% on an annualized basis, or the Alternate Base Rate, which is the greater of (a) the facility's administrative agent's daily announced prime rate on the borrowing date, (b) 2% plus the Federal Funds Rate on the borrowing date and (c) 2% plus the overnight Eurodollar rate on the borrowing date. The Funds pay an annual commitment fee to participate in a credit facility. The commitment fee is allocated among participating Funds based on an allocation schedule set forth in the credit agreement. For the six months ended February 29, 2016, the Fund had no borrowings under the credit facility. Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 39 Additional Information (unaudited) PIM, the Fund's investment adviser, is currently an indirect, wholly owned subsidiary of UniCredit. On November 11, 2015, UniCredit announced that it signed a binding master agreement with Banco Santander and affiliates of Warburg Pincus and General Atlantic (the "Private Equity Firms") with respect to Pioneer Investments ("Pioneer") and Santander Asset Management ("SAM") (the "Transaction"). The Transaction, as previously announced by UniCredit, will establish a holding company, with the name Pioneer Investments, to be owned by UniCredit (50%) and the Private Equity Firms (50% between them). The holding company will control Pioneer's U.S. operations, including the Adviser. The holding company also will own 66.7% of Pioneer's and SAM's combined operations outside the U.S., while Banco Santander will own directly the remaining 33.3% stake. The closing of the Transaction is expected to happen in 2016, subject to certain regulatory and other approvals. Under the Investment Company Act of 1940, completion of the Transaction will cause the Fund's current investment advisory agreement with PIM to terminate. Accordingly, the Fund's Board of Trustees will be asked to approve a new investment advisory agreement. If approved by the Board, the Fund's new investment advisory agreement will be submitted to the shareholders of the Fund for their approval. 40 Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 Approval of Investment Advisory Agreement Pioneer Investment Management, Inc. (PIM) serves as the investment adviser to Pioneer High Income Municipal Fund (the Fund) pursuant to an investment advisory agreement between PIM and the Fund. In order for PIM to remain the investment adviser of the Fund, the Trustees of the Fund must determine annually whether to renew the investment advisory agreement for the Fund. The contract review process began in January 2015 as the Trustees of the Fund agreed on, among other things, an overall approach and timeline for the process. Contract review materials were provided to the Trustees in March 2015 and July 2015. Supplemental contract review materials were provided to the Trustees in September 2015. In addition, the Trustees reviewed and discussed the Fund's performance at regularly scheduled meetings throughout the year, and took into account other information related to the Fund provided to the Trustees at regularly scheduled meetings, in connection with the review of the Fund's investment advisory agreement. In March 2015, the Trustees, among other things, discussed the memorandum provided by Fund counsel that summarized the legal standards and other considerations that are relevant to the Trustees in their deliberations regarding the renewal of the investment advisory agreement, and reviewed and discussed the qualifications of the investment management teams, as well as the level of investment by the Fund's portfolio managers in the Fund. In July 2015, the Trustees, among other things, reviewed the Fund's management fee and total expense ratios, the financial statements of PIM and its parent companies, the profitability analyses provided by PIM, and possible economies of scale. The Trustees also reviewed the profitability of the institutional business of PIM and PIM's affiliate, Pioneer Institutional Asset Management, Inc. (together with PIM, "Pioneer"), as compared to that of PIM's fund management business, and considered the differences between the fees and expenses of the Fund and the fees and expenses of Pioneer's institutional accounts, as well as the different services provided by PIM to the Fund and by Pioneer to the institutional accounts. The Trustees further considered contract review materials in September 2015. At a meeting held on September 15, 2015, based on their evaluation of the information provided by PIM and third parties, the Trustees of the Fund, including the Independent Trustees voting separately, unanimously approved the renewal of the investment advisory agreement for another year. In approving the renewal of the investment advisory agreement, the Trustees Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 41 considered various factors that they determined were relevant, including the factors described below. The Trustees did not identify any single factor as the controlling factor in determining to approve the renewal of the agreement. Nature, Extent and Quality of Services The Trustees considered the nature, extent and quality of the services that had been provided by PIM to the Fund, taking into account the investment objective and strategy of the Fund. The Trustees also reviewed PIM's investment approach for the Fund and its research process. The Trustees considered the resources of PIM and the personnel of PIM who provide investment management services to the Fund. They also reviewed the amount of non-Fund assets managed by the portfolio managers of the Fund. The Trustees considered the non-investment resources and personnel of PIM involved in PIM's services to the Fund, including PIM's compliance and legal resources and personnel. The Trustees noted the substantial attention and high priority given by PIM's senior management to the Pioneer fund complex. The Trustees considered that PIM supervises and monitors the performance of the Fund's service providers and provides the Fund with personnel (including Fund officers) and other resources that are necessary for the Fund's business management and operations. The Trustees also considered that, as administrator, PIM is responsible for the administration of the Fund's business and other affairs. The Trustees considered the fees paid to PIM for the provision of administration services. Based on these considerations, the Trustees concluded that the nature, extent and quality of services that had been provided by PIM to the Fund were satisfactory and consistent with the terms of the investment advisory agreement. Performance of the Fund In considering the Fund's performance, the Trustees regularly review and discuss throughout the year data prepared by PIM and information comparing the Fund's performance with the performance of its peer group of funds as classified by each of Morningstar, Inc. (Morningstar) and Lipper, and with the performance of the Fund's benchmark index. They discussed the Fund's performance with PIM on a more frequent basis in light of the Fund's unfavorable performance compared to its benchmark index and peers over certain periods. The Trustees noted PIM's explanation for the Fund's relative performance and the steps taken by PIM to address the Fund's performance, including further diversifying the Fund's portfolio. It also was noted that Jonathan Chirunga was added as a portfolio manager of the Fund in 2013. The 42 Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 Trustees' reviews and discussions, including the steps taken by PIM to address the Fund's performance, were factored into the Trustees' deliberations concerning the renewal of the advisory agreement. Management Fee and Expenses The Trustees considered information showing the fees and expenses of the Fund in comparison to the management fees and expense ratios of its peer group of funds as classified by Morningstar and also to the expense ratios of a peer group of funds selected on the basis of criteria determined by the Independent Trustees for this purpose using data provided by Strategic Insight Mutual Fund Research and Consulting, LLC (Strategic Insight), an independent third party. In all quintile rankings referred to below, first quintile is most favorable to the Fund's shareowners. The Trustees considered that the Fund's management fee for the most recent fiscal year was in the third quintile relative to the management fees paid by other funds in its Morningstar peer group for the comparable period. The Trustees also considered the breakpoints in the management fee schedule and the reduced fee rates above certain asset levels. The Trustees considered that the expense ratio of the Fund's Class A shares for the most recent fiscal year was in the fourth quintile relative to its Morningstar peer group and in the third quintile relative to its Strategic Insight peer group, in each case for the comparable period. The Trustees considered that the expense ratio of the Fund's Class A shares was approximately five basis points higher than the median expense ratio of its Morningstar peer group. The Trustees considered the impact of transfer agency, sub-transfer agency, and other non-management fee expenses on the expense ratios of the Fund, and noted the impact of expenses relating to small accounts and omnibus accounts on transfer and sub-transfer agency expenses generally. The Trustees noted that they separately review the Fund's transfer agency, sub-transfer agency and intermediary arrangements. The Trustees reviewed management fees charged by Pioneer to institutional and other clients, including publicly offered European funds sponsored by affiliates of Pioneer, unaffiliated U.S. registered investment companies (in a sub-advisory capacity), and unaffiliated foreign and domestic separate accounts. The Trustees also considered PIM's costs in providing services to the Fund and Pioneer's costs in providing services to the other clients and considered the differences in management fees and profit margins for Fund and non-Fund services. In evaluating the fees associated with Pioneer's client accounts, the Trustees took into account the respective demands, resources and complexity associated with the Fund and client accounts. The Trustees noted that, in some instances, the fee rates for those clients were lower than the management fee for the Fund and considered that, under the investment Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 43 advisory agreement with the Fund, PIM performs additional services for the Fund that it does not provide to those other clients or services that are broader in scope, including oversight of the Fund's other service providers and activities related to compliance and the extensive regulatory and tax regimes to which the Fund is subject. The Trustees also considered the different entrepreneurial risks associated with PIM's management of the Fund and Pioneer's management of the other client accounts. The Trustees concluded that the management fee payable by the Fund to PIM was reasonable in relation to the nature and quality of the services provided by PIM to the Fund. Profitability The Trustees considered information provided by PIM regarding the profitability of PIM with respect to the advisory services provided by PIM to the Fund, including the methodology used by PIM in allocating certain of its costs to the management of the Fund. The Trustees also considered PIM's profit margin in connection with the overall operation of the Fund. They further reviewed the financial results realized by PIM and its affiliates from non-fund businesses. The Trustees considered PIM's profit margins with respect to the Fund in comparison to the limited industry data available and noted that the profitability of any adviser was affected by numerous factors, including its organizational structure and method for allocating expenses. The Trustees concluded that PIM's profitability with respect to the management of the Fund was not unreasonable. Economies of Scale The Trustees considered PIM's views relating to economies of scale in connection with the Pioneer Funds as fund assets grow and the extent to which any such economies of scale are shared with funds and fund shareholders. The Trustees noted the breakpoints in the management fee schedule. The Trustees recognize that economies of scale are difficult to identify and quantify, and that, among other factors that may be relevant, are the following: fee levels, expense subsidization, investment by PIM in research and analytical capabilities and PIM's commitment and resource allocation to the Fund. The Trustees noted that profitability also may be an indicator of the availability of any economies of scale, although profitability may vary for other reasons including reductions in expenses. The Trustees concluded that economies of scale, if any, were being appropriately shared with the Funds. 44 Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 Other Benefits The Trustees considered the other benefits to PIM from its relationship with the Fund. The Trustees considered the character and amount of fees paid by the Fund, other than under the investment advisory agreement, for services provided by PIM and its affiliates. The Trustees further considered the revenues and profitability of PIM's businesses other than the fund business. Pioneer is the principal U.S. asset management business of Pioneer Global Asset Management, the worldwide asset management business of UniCredit Group, which manages over $150 billion in assets (including the Funds). Pioneer and the Funds receive reciprocal intangible benefits from the relationship, including mutual brand recognition and, for the Funds, direct and indirect access to the resources of a large global asset manager. The Trustees concluded that any such benefits received by Pioneer as a result of its relationship with the Funds were reasonable and their consideration of the advisory agreement between the Fund and PIM and the fees thereunder were unaffected by Pioneer's possible receipt of any such intangible benefits. Conclusion After consideration of the factors described above as well as other factors, the Trustees, including all of the Independent Trustees, concluded that the investment advisory agreement between PIM and the Fund, including the fees payable thereunder, was fair and reasonable and voted to approve the proposed renewal of the investment advisory agreement for the Fund. Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 45 Trustees, Officers and Service Providers Trustees Advisory Trustee Thomas J. Perna, Chairman Lorraine H. Monchak* David R. Bock Benjamin M. Friedman Officers Margaret B.W. Graham Lisa M. Jones, President and Chief Marguerite A. Piret Executive Officer Fred J. Ricciardi Mark E. Bradley, Treasurer and Kenneth J. Taubes Chief Financial Officer Christopher J. Kelley, Secretary and Chief Legal Officer Investment Adviser and Administrator Pioneer Investment Management, Inc. Custodian and Sub-Administrator Brown Brothers Harriman & Co. Principal Underwriter Pioneer Funds Distributor, Inc. Legal Counsel Morgan, Lewis & Bockius LLP Shareowner Services and Transfer Agent Boston Financial Data Services, Inc. Proxy Voting Policies and Procedures of the Fund are available without charge, upon request, by calling our toll free number (1-800-225-6292). Information regarding how the Fund voted proxies relating to portfolio securities during the most recent 12-month period ended June 30 is publicly available to shareowners at us.pioneerinvestments.com. This information is also available on the Securities and Exchange Commission's web site at www.sec.gov. * Ms. Monchak is a non-voting Advisory Trustee. 46 Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 This page for your notes. Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 47 This page for your notes. 48 Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 This page for your notes. Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 49 This page for your notes. 50 Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 This page for your notes. Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 51 This page for your notes. 52 Pioneer High Income Municipal Fund | Semiannual Report | 2/29/16 How to Contact Pioneer We are pleased to offer a variety of convenient ways for you to contact us for assistance or information. Call us for: -------------------------------------------------------------------------------- Account Information, including existing accounts, new accounts, prospectuses, applications and service forms 1-800-225-6292 FactFone(SM) for automated fund yields, prices, account information and transactions 1-800-225-4321 Retirement plans information 1-800-622-0176 Write to us: -------------------------------------------------------------------------------- Pioneer Funds P.O. Box 55014 Boston, Massachusetts 02205-5014 Our toll-free fax 1-800-225-4240 Our internet e-mail address ask.pioneer@pioneerinvestments.com (for general questions about Pioneer only) Visit our web site: us.pioneerinvestments.com This report must be preceded or accompanied by a prospectus. The Fund files a complete schedule of investments with the Securities and Exchange Commission for the first and third quarters for each fiscal year on Form N-Q. Shareholders may view the filed Form N-Q by visiting the Commission's web site at http://www.sec.gov. The filed form may also be viewed and copied at the Commission's Public Reference Room in Washington, DC. Information regarding the operations of the Public Reference Room may be obtained by calling 1-800-SEC-0330. [LOGO] PIONEER Investments(R) Pioneer Investment Management, Inc. 60 State Street Boston, MA 02109 us.pioneerinvestments.com Securities offered through Pioneer Funds Distributor, Inc. 60 State Street, Boston, MA 02109 Underwriter of Pioneer Mutual Funds, Member SIPC (C) 2016 Pioneer Investments 20563-09-0416 Pioneer Long/Short Bond Fund (Formerly Pioneer Long/Short Global Bond Fund)* -------------------------------------------------------------------------------- Semiannual Report | February 29, 2016 -------------------------------------------------------------------------------- Ticker Symbols: Class A LSGAX Class C LSGCX Class Y LSGYX * Effective June 1, 2015, the Fund was renamed Pioneer Long/Short Bond Fund. [LOGO] PIONEER Investments(R) visit us: us.pioneerinvestments.com Table of Contents President's Letter 2 Portfolio Management Discussion 4 Portfolio Summary 10 Prices and Distributions 11 Performance Update 12 Comparing Ongoing Fund Expenses 15 Schedule of Investments 17 Financial Statements 27 Notes to Financial Statements 34 Approval of Investment Advisory Agreement 55 Trustees, Officers and Service Providers 60 Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 1 President's Letter Dear Shareowner, Over the past several years, many investors experienced positive returns across most major asset classes. However, 2015 was a tale of two markets, with favorable market conditions in the first half of the year, followed by an abrupt slowdown and increased volatility beginning in August. The global markets were challenged by significant economic cross-currents in different geographic regions and industrial sectors. While the U.S. economy gradually improved, growth slowed in China. Emerging markets struggled following a decline in commodity prices, especially oil. While lower energy prices are good for the consumer, there were ripple effects throughout the global economy. Against this backdrop, the Standard & Poor's 500 Index rose by just 1.4% in 2015, international equity markets were essentially flat, and emerging market equities fell sharply. Across U.S. fixed-income sectors, U.S. government and investment-grade corporate bonds were fairly flat for the year, while high-yield bonds, as measured by the Bank of America Merrill Lynch Master II High Yield Index, posted a -4.9% total return. Entering 2016, we see the U.S. economy growing modestly, against an overall global economic backdrop that remains fragile and points towards structurally lower growth. As always in a presidential election year, political rhetoric has the potential to impact U.S. sectors such as health care in 2016. Economies around the world in both developed and emerging markets are experiencing deep structural change. Geopolitical instability on many fronts, the rising risk of policy mistakes, and market liquidity issues all increase the possibility of sharp swings in asset values. In this environment, financial markets remain vulnerable to unusual levels of volatility. While divergences among regions and industries is an important theme, we are generally optimistic about the outlook for the U.S. economy, which we expect will see continued, positive growth led by a strengthened consumer. Throughout Pioneer's history, we have believed in the importance of active management. In periods of market volatility, we believe that the value of active management is even more compelling. Our experienced and tenured investment teams focus on identifying value across global markets using proprietary research, careful risk management, and a long-term perspective. Our ongoing goal is to produce compelling returns consistent with the stated objectives of our investment products, and with our shareowners' expectations. We believe our shareowners can benefit from the experience and tenure of our investment teams as well as the insights generated from our extensive research process. 2 Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 As always, and particularly during times of market uncertainty, we encourage you to work with your financial advisor to develop an overall investment plan that addresses both your short- and long-term goals, and to implement such a plan in a disciplined manner. We greatly appreciate the trust you have placed in us and look forward to continuing to serve you in the future. Sincerely, /s/ Lisa M. Jones Lisa M. Jones President and CEO Pioneer Investment Management USA Inc. February 29, 2016 Any information in this shareowner report regarding market or economic trends or the factors influencing the Fund's historical or future performance are statements of opinion as of the date of this report. These statements should not be relied upon for any other purposes. Past performance is no guarantee of future results, and there is no guarantee that market forecasts discussed will be realized. Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 3 Portfolio Management Discussion | 2/29/16 In the following interview, portfolio managers Thomas Swaney and Benjamin Gord discuss the factors that influenced Pioneer Long/Short Bond Fund's performance during the six-month period ended February 29, 2016, as well as their investment approach in managing the Fund. Mr. Swaney, Head of Alternative Fixed Income, U.S., a senior vice president, and a portfolio manager at Pioneer (lead portfolio manager of the Fund since 2013), and Mr. Gord, a vice president and a portfolio manager at Pioneer, are responsible for the day-to-day management of the Fund. Q How did the Fund perform during the six-month period ended February 29, 2016? A Pioneer Long/Short Bond Fund's Class A shares returned -6.16% at net asset value during the six-month period ended February 29, 2016, while the Fund's benchmark, the Bank of America Merrill Lynch (BofA ML) 3-Month U.S. Treasury-Bill Index, returned 0.06%. During the same period, the average return of the 306 mutual funds in Lipper's Alternative Credit Focus Funds category was -3.45%, and the average return of the 537 mutual funds in Morningstar's Non-Traditional Bond Funds category was -2.94%. Q Can you provide an overview of the Fund's approach? A The big picture is that we seek to have the Fund produce an average annual return that is greater than the return on three-month Treasury bills on an annualized basis, with volatility lower than one would experience in the broad equity market. In pursuing this goal, we seek to have the Fund provide positive returns while trying to minimize the extent of any negative returns, regardless of market conditions. Obviously, if we are going to be successful in achieving our objective, the Fund's returns cannot be overly dependent on the direction of one or more financial asset categories. In seeking positive returns regardless of market conditions, we utilize two distinct strategies. One strategy is "directional," in that we need to be correct about whether a particular asset price is poised to rise or fall. However, we seek to have the Fund's performance benefit from both positive and negative returns. This means that at times we invest the portfolio in some asset categories within the broad bond market by taking long positions, while taking an unfavorable view of other asset classes by taking short positions. The other part of the portfolio utilizes uncorrelated, relative-value-based trading strategies, in which we do not have to take a stance on whether an individual market is going to rise or fall overall. Instead, we need to identify either a segment or security within a market that we believe will outperform 4 Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 versus another market segment or security. We execute these portfolio investment strategies across several different global financial markets and many different asset classes. We will seek to "pair" positions, meaning that the Fund will have a long position in one segment/security of a particular market, and a short position in another segment/security. We believe this strategy can allow the Fund to benefit from favorable relative performance, regardless of the overall direction of that market. Most importantly, we closely track the risks we have assumed in both portions of the portfolio and operate within an overall "risk budget," which is based on our goal of largely avoiding negative returns over a 12-month period (full fiscal year). Q Can you discuss the investment strategies that had the biggest effects on the Fund's benchmark-relative performance during the six-month period ended February 29, 2016? A The Fund underperformed the BofA ML Index during the period, with the vast majority of the negative returns attributable to positions within the relative value, or market neutral, portion of the portfolio. In that vein, the portfolio's long/short relative-value-based strategy, under which we pair a long or short position in an individual security with an opposing position, detracted from relative results over the entire six-month timeframe. (Long/Short positioning involves taking long, or bought positions in fixed-income/equity securities in anticipation that they will increase in value, and taking short, or sold positions in fixed- income/equities in anticipation that they will decrease in value.) An example of a long/short trade that did not turn out well for the Fund was a pairing of a short position in electronics retailer Best Buy with a long position in the broader market (in five-year securities). Conversely, a long/short trade that performed well over the six-month period was one where we tried to take advantage of a technically driven price decline, going long Frontier Communications, a domestic telecommunications company. One thematic trade that detracted from the Fund's results involved taking long portfolio exposures to energy-related issuers of higher credit quality, while shorting non-energy names. We executed the trade because we expected the price of oil to stabilize following the sharp declines already experienced since roughly mid-2014. However, the price of oil continued to slide over the six-month period, and energy credits lagged as a result, causing the Fund's position to decline in value. Another relative value-based strategy that detracted from the Fund's performance during the period involved holding a long portfolio of short- maturity corporate credits (generally one year or less) priced at levels suggesting the market was overestimating the risk of default, while Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 5 attempting to hedge out the impact of the broader market's performance. While most of the shorter-term securities had positive returns over the six- month period, a handful of long positions underperformed, resulting in losses for this particular strategy. Within this strategy, one trade that detracted from relative performance was a long position in Abengoa, a Spanish infrastructure company. An example of a trade that generated positive returns within the same strategy was going long on Glencore, a European metals company. We believed that Glencore's bond prices had overshot to the downside in the wake of commodity-price weakness, given the company's overall financial flexibility. On the directional side of the portfolio, the most significant detractor from the Fund's results was a position designed to benefit from any rebound in the performance of European high-yield corporate bonds. We anticipated that high-yield bond valuations would benefit from stepped-up European Central Bank (ECB) efforts to stimulate growth, following a poor response to the ECB's December announcement regarding planned asset purchases. However, credit sentiment and high-yield valuations were undermined in early 2016 by an escalation of concerns about the banking sector in Europe, as Deutsche Bank reported losses. Finally, the Fund's thematic long/short value currency trades contributed to performance during the period. In particular, being short the Swedish krona versus the U.S. dollar, long the Australian dollar versus the New Zealand dollar, and long the Mexican peso versus the Canadian dollar. Q Please discuss the role of derivatives in implementing the Fund's investment approach during the six-month period ended February 29, 2016. A We implement virtually all of the portfolio's strategies via derivatives, and so the Fund's performance will always be affected by derivatives trading. For instance, when we want to short U.S. Treasuries, we will do so mainly by selling Treasury futures or sometimes by buying "put" options. (A "put" option is a contractual agreement that gives the contract owner the right, but not the obligation, to sell a security at a pre-determined, fixed price for a certain period of time, regardless of the current market price of that security.) Similarly, in the currency sleeve of the Fund, we use forwards and options to gain the desired exposures. With respect to credit markets, where there are no liquid futures contracts, we may use credit default swaps to manage the portfolio's exposures. In other situations, we utilize instruments such as interest-rate or inflation swaps to implement our strategies. 6 Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 Q What is your assessment of the current macroeconomic climate and the investment opportunities it may present? A At present, we are cautious about taking risks with respect to market direction, due to a number of significant uncertainties affecting the global economy. A potential slowdown in China's economy, paired with the possibility of the Chinese government's providing stimulus to rattle markets; the effectiveness of the ECB's and Bank of Japan's stimulus policies; volatile oil prices and their effect on the global economy; the uncertain pace of interest-rate hikes by the U.S. Federal Reserve; and the potential impact of a strong U.S. dollar on both domestic equity valuations and overseas debtors are among the issues dominating current market sentiment. Against this backdrop, we foresee only relatively slow global economic growth, and believe the environment of heightened market volatility will persist as investors react to the flow of news and economic data. As a result, we expect to look principally to relative-value trades as a potential source of return for the Fund. We continue to see relatively few directional investment opportunities in the fixed-income markets. Viewed in isolation, credit spreads have widened to reasonably attractive levels. However, the elevated price volatility has diminished the attractiveness of the spreads on a risk-adjusted basis. (Credit spreads are commonly defined as the differences in yield between Treasuries and other types of fixed-income securities with similar maturities.) That said, we plan to remain active in evaluating any directional opportunities created by market swings. Going forward, we will continue to seek to identify investment opportunities that emerge as market reactions overshoot developments on various macroeconomic fronts. Note to Shareholders: Effective June 1, 2015, Pioneer Long/Short Global Bond Fund was renamed Pioneer Long/Short Bond Fund. In addition, the investment policy to allocate at least 40% of the Fund's assets in non-U.S. securities was eliminated. The Fund's investment objectives and overall strategy did not change. Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 7 Please refer to the Schedule of Investments on pages 17-26 for a full listing of Fund securities. All investments are subject to risk, including the possible loss of principal. In the past several years, financial markets have experienced increased volatility, depressed valuations, decreased liquidity, and heightened uncertainty. These conditions may continue, recur, worsen, or spread. The Fund may invest in derivative securities, such as options, futures, inverse floating-rate obligations, and swaps, among others, which can be illiquid, may disproportionately increase losses, and have a potentially large impact on the performance of the Fund. The Fund may take short positions, which involves leverage of its assets and presents additional risks. The Fund may invest in credit default swaps, which may in some cases be illiquid, and they increase credit risk since the Fund has exposure to both the issuer of the referenced obligation and the counterparty to the credit default swap. The Fund employs leverage, which increases the volatility of investment returns and subjects the Fund to magnified losses. Investments in fixed-income securities involve interest rate, credit, inflation, and reinvestment risks. When interest rates rise, the prices of fixed-income securities in the Fund will generally fall. Conversely, when interest rates fall, the prices of fixed-income securities in the Fund will generally rise. Investments in the Fund are subject to possible loss due to the financial failure of issuers of underlying securities and their inability to meet their debt obligations. Investments in high-yield or lower-rated securities are subject to greater-than- average price volatility, illiquidity and possibility of default. Prepayment risk is the chance that an issuer may exercise its right to prepay its security, if falling interest rates prompt the issuer to do so. Forced to reinvest the unanticipated proceeds at lower interest rates, the Fund would experience a decline in income and lose the opportunity for additional price appreciation. The securities issued by U.S. Government sponsored entities (e.g., FNMA, Freddie Mac) are neither guaranteed nor issued by the U.S. Government. The Fund may invest in mortgage-backed securities, which during times of fluctuating interest rates may increase or decrease more than other fixed-income securities. Mortgage-backed securities are also subject to pre-payments. Investing in foreign and/or emerging markets securities involves risks relating to interest rates, currency exchange rates, economic, and political conditions. 8 Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 The Fund may invest in event-linked bonds and other insurance-linked securities. The return of principal and the payment of interest on insurance-linked securities are contingent on the non-occurrence of a pre-defined "trigger" event, such as a hurricane or an earthquake of a specific magnitude. The Fund may invest in floating-rate loans; the value of collateral, if any, securing a floating-rate loan can decline or may be insufficient to meet the issuer's obligations or may be difficult to liquidate. The Fund is subject to currency risk, meaning that the Fund could experience losses based on changes in the exchange rate between non-U.S. currencies and the U.S. dollar. The Fund is non-diversified, which means that it can invest a large percentage of its assets in the securities of any one or more issuers. This increases the Fund's potential risk exposure. These risks may increase share price volatility. There is no assurance that these and other strategies used by the Fund will be successful. Please see the prospectus for a more complete discussion of the Fund's risks. Before investing, consider the product's investment objectives, risks, charges and expenses. Contact your advisor or Pioneer Investments for a prospectus or summary prospectus containing this information. Read it carefully. Any information in this shareholder report regarding market or economic trends or the factors influencing the Fund's historical or future performance are statements of opinion as of the date of this report. Past performance is no guarantee of future results. Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 9 Portfolio Summary | 2/29/16 Portfolio Diversification -------------------------------------------------------------------------------- (As a percentage of total investment portfolio)(#) [THE FOLLOWING DATA WAS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL] U.S. Government Securities 64.9% Temporary Cash Investment 11.8% U.S. Corporate Bonds 10.8% International Corporate Bonds 6.0% Asset Backed Securities 2.6% Collateralized Mortgage Obligations 2.5% U.S. Preferred Stocks 1.4% (#) The chart does not include all of the Fund's derivative investments. For information regarding the Fund's derivative investments, see the Portfolio Management Discussion, the Schedule of Investments and the Notes to Financial Statements. 10 Largest Holdings (As a percentage of total long-term holdings)* 1. U.S. Treasury Bills, 3/31/16 7.57% -------------------------------------------------------------------------------- 2. U.S. Treasury Note, Floating Rate Note, 1/31/18 6.05 -------------------------------------------------------------------------------- 3. U.S. Treasury Note, Floating Rate Note, 1/31/17 6.05 -------------------------------------------------------------------------------- 4. U.S. Treasury Note, Floating Rate Note, 7/31/16 6.05 -------------------------------------------------------------------------------- 5. U.S. Treasury Note, Floating Rate Note, 4/30/16 6.05 -------------------------------------------------------------------------------- 6. U.S. Treasury Note, Floating Rate Note, 10/31/16 6.05 -------------------------------------------------------------------------------- 7. U.S. Treasury Note, Floating Rate Note, 4/30/17 6.04 -------------------------------------------------------------------------------- 8. U.S. Treasury Bills, 3/17/16 5.96 -------------------------------------------------------------------------------- 9. U.S. Treasury Bills, 3/24/16 5.77 -------------------------------------------------------------------------------- 10. U.S. Treasury Note, Floating Rate Note, 10/31/17 5.67 -------------------------------------------------------------------------------- * This list excludes temporary cash investments and derivative instruments. Due to the exclusion of derivatives, the list may not represent the Fund's market exposures. See the Portfolio Management Discussion, the Schedule of Investments and the Notes to Financial Statements. The portfolio is actively managed, and current holdings may be different. The holdings listed should not be considered recommendations to buy or sell any security listed. 10 Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 Prices and Distributions |2/29/16 Net Asset Value per Share -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Class 2/29/16 8/31/15 -------------------------------------------------------------------------------- A $9.18 $9.95 -------------------------------------------------------------------------------- C $9.13 $9.87 -------------------------------------------------------------------------------- Y $9.21 $9.97 -------------------------------------------------------------------------------- Distributions per Share: 9/1/15-2/29/16 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Net Investment Short-Term Long-Term Class Income Capital Gains Capital Gains -------------------------------------------------------------------------------- A $0.1589 $ -- $ -- -------------------------------------------------------------------------------- C $0.1011 $ -- $ -- -------------------------------------------------------------------------------- Y $0.1537 $ -- $ -- -------------------------------------------------------------------------------- Index Definitions -------------------------------------------------------------------------------- The Bank of America Merrill Lynch (BofA ML) 3-Month US Treasury Bill Index is an unmanaged market index of U.S. Treasury securities maturing in 90 days, that assumes reinvestment of all income. Index returns are calculated monthly, assume reinvestment of dividends and, unlike Fund returns, do not reflect any fees, expenses or sales charges. It is not possible to invest directly in an index. The index defined here pertains to the "Value of $10,000 Investment" and "Value of $5 Million Investment" charts appearing on pages 12-14. Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 11 Performance Update | 2/29/16 Class A Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Class A shares of Pioneer Long/Short Bond Fund at public offering price during the periods shown, compared to that of the Bank of America Merrill Lynch (BofA ML) 3-month US Treasury Bill Index. Average Semiannual Total Returns (As of February 29, 2016) -------------------------------------------------------------------------------- Net Public BofA ML Asset Offering 3-Month Value Price U.S. Treasury Period (NAV) (POP) Bill Index -------------------------------------------------------------------------------- Life of Class (12/30/13) -2.16% -4.21% 0.05% 1 Year -7.00 -11.16 0.08 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated December 31, 2015) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 2.35% 1.55% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Long/Short BofA ML 3-month US Bond Fund Treasury Bill Index 12/13 $9,550 $10,000 2/14 $9,551 $10,001 2/15 $9,797 $10,004 2/16 $9,110 $10,012 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. NAV results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. POP returns reflect deduction of maximum 4.50% sales charge. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The net expense ratio reflects the contractual expense limitation currently in effect through January 1, 2017, for Class A shares. There can be no assurance that Pioneer will extend the expense limitation beyond such time. Please see the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. 12 Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 Performance Update | 2/29/16 Class C Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Class C shares of Pioneer Long/Short Bond Fund during the periods shown, compared to that of the Bank of America Merrill Lynch (BofA ML) 3-month US Treasury Bill Index. Average Semiannual Total Returns (As of February 29, 2016) -------------------------------------------------------------------------------- BofA ML 3-Month If If U.S. Treasury Period Held Redeemed Bill Index -------------------------------------------------------------------------------- Life of Class (12/30/13) -2.90% -2.90% 0.05% 1 Year -7.70 -7.70 0.08 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated December 31, 2015) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 3.10% 2.30% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Long/Short BofA ML 3-month US Bond Fund Treasury Bill Index 12/13 $10,000 $10,000 2/14 $ 9,990 $10,001 2/15 $10,167 $10,004 2/16 $ 9,383 $10,012 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Class C shares held for less than one year are also subject to a 1% contingent deferred sales charge (CDSC). "If Held" results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The net expense ratio reflects the contractual expense limitation currently in effect through January 1, 2017, for Class C shares. There can be no assurance that Pioneer will extend the expense limitation beyond such time. Please see the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 13 Performance Update | 2/29/16 Class Y Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $5 million investment made in Class Y shares of Pioneer Long/Short Bond Fund during the periods shown, compared to that of the Bank of America Merrill Lynch (BofA ML) 3-month US Treasury Bill Index. Average Semiannual Total Returns (As of February 29, 2016) -------------------------------------------------------------------------------- Net BofA ML Asset 3-Month Value U.S. Treasury Period (NAV) Bill Index -------------------------------------------------------------------------------- Life of Class (12/30/13) -1.96% 0.05% 1 Year -6.94 0.08 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated December 31, 2015) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 2.08% 1.30% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $5 Million Investment Pioneer Long/Short BofA ML 3-month US Bond Fund Treasury Bill Index 12/13 $5,000,000 $5,000,000 2/14 $5,000,000 $5,000,363 2/15 $5,147,724 $5,001,901 2/16 $4,790,415 $5,005,768 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Class Y shares are not subject to sales charges and are available for limited groups of eligible investors, including institutional investors. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The net expense ratio reflects the contractual expense limitation currently in effect through January 1, 2017, for Class Y shares. There can be no assurance that Pioneer will extend the expense limitation beyond such time. Please see the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. 14 Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 Comparing Ongoing Fund Expenses As a shareowner in the Fund, you incur two types of costs: (1) ongoing costs, including management fees, distribution and/or service (12b-1) fees, and other Fund expenses; and (2) transaction costs, including sales charges (loads) on purchase payments. This example is intended to help you understand your ongoing expenses (in dollars) of investing in the Fund and to compare these costs with the ongoing costs of investing in other mutual funds. The example is based on an investment of $1,000 at the beginning of the Fund's latest six-month period and held throughout the six months. Using the Tables -------------------------------------------------------------------------------- Actual Expenses The first table below provides information about actual account values and actual expenses. You may use the information in this table, together with the amount you invested, to estimate the expenses that you paid over the period as follows: (1) Divide your account value by $1,000 Example: an $8,600 account value (divided by) $1,000 = 8.6 (2) Multiply the result in (1) above by the corresponding share class's number in the third row under the heading entitled "Expenses Paid During Period" to estimate the expenses you paid on your account during this period. Expenses Paid on a $1,000 Investment in Pioneer Long/Short Bond Fund Based on actual returns from September 1, 2015, through February 29, 2016. -------------------------------------------------------------------------------- Share Class A C Y -------------------------------------------------------------------------------- Beginning Account Value on 9/1/15 $1,000.00 $1,000.00 $1,000.00 -------------------------------------------------------------------------------- Ending Account Value (after expenses) $ 938.40 $ 935.10 $ 939.00 on 2/29/16 -------------------------------------------------------------------------------- Expenses Paid During Period* $ 7.47 $ 11.07 $ 6.27 -------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized net expense ratio of 1.55%, 2.30%, and 1.30%, for Class A, Class C and Class Y shares, respectively, multiplied by the average account value over the period multiplied by 182/366 (to reflect the one half year period). Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 15 Hypothetical Example for Comparison Purposes The table below provides information about hypothetical account values and hypothetical expenses based on the Fund's actual expense ratio and an assumed rate of return of 5% per year before expenses, which is not the Fund's actual return. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in the Fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds. Please note that the expenses shown in the tables are meant to highlight your ongoing costs only and do not reflect any transaction costs, such as sales charges (loads) that are charged at the time of the transaction. Therefore, the table below is useful in comparing ongoing costs only and will not help you determine the relative total costs of owning different funds. In addition, if these transaction costs were included, your costs would have been higher. Expenses Paid on a $1,000 Investment in Pioneer Long/Short Bond Fund Based on a hypothetical 5% return per year before expenses, reflecting the period from September 1, 2015, through February 29, 2016. -------------------------------------------------------------------------------- Share Class A C Y -------------------------------------------------------------------------------- Beginning Account Value on 9/1/15 $1,000.00 $1,000.00 $1,000.00 -------------------------------------------------------------------------------- Ending Account Value (after expenses) $1,017.16 $1,013.43 $1,018.40 on 2/29/16 -------------------------------------------------------------------------------- Expenses Paid During Period* $ 7.77 $ 11.51 $ 6.52 -------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized net expense ratio of 1.55%, 2.30%, and 1.30%, for Class A, Class C and Class Y shares, respectively, multiplied by the average account value over the period multiplied by 182/366 (to reflect the one half year period). 16 Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 Schedule of Investments | 2/29/16 (unaudited) ------------------------------------------------------------------------------------------------ Principal Floating Amount ($) Rate (b) Value ------------------------------------------------------------------------------------------------ PREFERRED STOCK -- 1.2% DIVERSIFIED FINANCIALS -- 1.2% Investment Banking & Brokerage -- 1.2% 18,500 7.12 Morgan Stanley, Floating Rate Note (Perpetual) $ 520,405 ------------------------------------------------------------------------------------------------ TOTAL PREFERRED STOCK (Cost $519,941) $ 520,405 ------------------------------------------------------------------------------------------------ ASSET BACKED SECURITIES -- 2.8% BANKS -- 0.1% Thrifts & Mortgage Finance -- 0.1% 39,418 Icon Brand Holdings LLC, 4.229%, 1/26/43 (144A) $ 36,994 ----------- Total Banks $ 36,994 ------------------------------------------------------------------------------------------------ DIVERSIFIED FINANCIALS -- 2.7% Asset Management & Custody Banks -- 2.7% 630,000 RMAT 2015-1 LLC, 5.0%, 7/27/20 (Step) (144A) $ 618,634 629,957 VOLT XXXVII LLC, 4.375%, 7/25/45 (Step) (144A) 605,209 ----------- $ 1,223,843 ----------- Total Diversified Financials $ 1,223,843 ------------------------------------------------------------------------------------------------ TOTAL ASSET BACKED SECURITIES (Cost $1,283,494) $ 1,260,837 ------------------------------------------------------------------------------------------------ COLLATERALIZED MORTGAGE OBLIGATIONS -- 2.7% BANKS -- 2.7% Thrifts & Mortgage Finance -- 2.7% 280,000 3.21 Citigroup Commercial Mortgage Trust 2014-GC23 REMICS, Floating Rate Note, 7/12/47 (144A) $ 165,117 490,000 5.81 COMM 2007-C9 Mortgage Trust, Floating Rate Note, 12/10/49 (144A) 447,825 47,274 5.23 Credit Suisse First Boston Mortgage Securities Corp., Floating Rate Note, 12/17/40 47,187 123,421 4.94 GS Mortgage Securities Corp II Series 2005-GG4, Floating Rate Note, 7/10/39 114,082 200,000 JP Morgan Chase Commercial Mortgage Securities Trust 2006-CIBC16, 5.623%, 5/12/45 192,499 55,000 5.48 ML-CFC Commercial Mortgage Trust 2006-3, Floating Rate Note, 7/12/46 54,869 195,000 Wells Fargo Commercial Mortgage Trust 2010-C1, 4.0%, 11/18/43 (144A) 167,123 ----------- $ 1,188,702 ----------- Total Banks $ 1,188,702 ------------------------------------------------------------------------------------------------ TOTAL COLLATERALIZED MORTGAGE OBLIGATIONS (Cost $1,271,239) $ 1,188,702 ------------------------------------------------------------------------------------------------ The accompanying notes are an integral part of these financial statements. Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 17 Schedule of Investments | 2/29/16 (unaudited) (continued) ------------------------------------------------------------------------------------------------ Principal Floating Amount ($) Rate (b) Value ------------------------------------------------------------------------------------------------ CORPORATE BONDS -- 17.9% ENERGY -- 4.5% Oil & Gas Drilling -- 2.9% 1,280,000 Transocean, Inc., 5.55%, 12/15/16 $ 1,267,200 ------------------------------------------------------------------------------------------------ Integrated Oil & Gas -- 1.6% 720,000 Petrobras Global Finance BV, 3.5%, 2/6/17 $ 706,500 ----------- Total Energy $ 1,973,700 ------------------------------------------------------------------------------------------------ MATERIALS -- 4.4% Metal & Glass Containers -- 1.4% 650,000 Beverage Packaging Holdings Luxembourg II SA, 5.625%, 12/15/16 (144A) $ 649,188 ------------------------------------------------------------------------------------------------ Steel -- 3.0% 1,335,000 Glencore Funding LLC, 1.7%, 5/27/16 (144A) $ 1,321,650 ----------- Total Materials $ 1,970,838 ------------------------------------------------------------------------------------------------ BANKS -- 4.4% Diversified Banks -- 4.4% 515,000 6.50 Bank of America Corp., Floating Rate Note, 10/23/49 $ 525,300 515,000 5.90 Citigroup, Inc., Floating Rate Note (Perpetual) 489,384 515,000 6.62 Credit Agricole SA, Floating Rate Note (Perpetual) (144A) 453,753 515,000 6.50 ING Groep NV, Floating Rate Note, 12/29/49 466,397 ----------- $ 1,934,834 ----------- Total Banks $ 1,934,834 ------------------------------------------------------------------------------------------------ DIVERSIFIED FINANCIALS -- 0.1% Other Diversified Financial Services -- 0.1% INR 3,700,000 European Bank for Reconstruction & Development, 6.0%, 3/3/16 $ 54,250 ----------- Total Diversified Financials $ 54,250 ------------------------------------------------------------------------------------------------ INSURANCE -- 1.7% Reinsurance -- 1.7% 250,000 7.17 Caelus Re, Ltd., Floating Rate Note, 4/7/17 (Cat Bond) (144A) $ 253,525 250,000 4.67 Kilimanjaro Re, Ltd., Floating Rate Note, 4/30/18 (Cat Bond) (144A) 246,525 250,000 4.75 Residential Reinsurance 2012, Ltd., Floating Rate Note, 12/6/16 (Cat Bond) (144A) 249,950 ----------- $ 750,000 ----------- Total Insurance $ 750,000 ------------------------------------------------------------------------------------------------ The accompanying notes are an integral part of these financial statements. 18 Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 ------------------------------------------------------------------------------------------------ Principal Floating Amount ($) Rate (b) Value ------------------------------------------------------------------------------------------------ TELECOMMUNICATION SERVICES -- 2.8% Wireless Telecommunication Services -- 2.8% 1,265,000 Sprint Communications, Inc., 6.0%, 12/1/16 $ 1,255,512 ----------- Total Telecommunication Services $ 1,255,512 ------------------------------------------------------------------------------------------------ TOTAL CORPORATE BONDS (Cost $8,094,474) $ 7,939,134 ------------------------------------------------------------------------------------------------ U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- 69.1% 1,000,000 Federal Home Loan Bank Discount Notes, 3/2/16 (c) $ 999,992 150,000 Federal Home Loan Bank Discount Notes, 3/21/16 (c) 149,977 300,000 Federal Home Loan Bank Discount Notes, 3/4/16 (c) 299,993 2,500,000 U.S. Treasury Bills, 3/17/16 (c) 2,499,758 2,420,000 U.S. Treasury Bills, 3/24/16 (c) 2,419,639 3,175,000 U.S. Treasury Bills, 3/31/16 (c) 3,174,336 1,110,978 U.S. Treasury Inflation Indexed Bonds, 1.375%, 2/15/44 1,200,971 2,535,000 0.40 U.S. Treasury Note, Floating Rate Note, 1/31/17 (d) 2,535,507 2,535,000 0.37 U.S. Treasury Note, Floating Rate Note, 10/31/16 (d) 2,535,061 2,380,000 0.49 U.S. Treasury Note, Floating Rate Note, 10/31/17 (d) 2,378,824 2,535,000 0.39 U.S. Treasury Note, Floating Rate Note, 4/30/16 2,535,190 2,535,000 0.39 U.S. Treasury Note, Floating Rate Note, 4/30/17 (d) 2,534,014 2,535,000 0.39 U.S. Treasury Note, Floating Rate Note, 7/31/16 2,535,411 2,230,000 0.40 U.S. Treasury Note, Floating Rate Note, 7/31/17 2,227,632 2,535,000 0.60 U.S. Treasury Note, Floating Rate Note, 1/31/18 2,536,680 ----------- $30,562,985 ------------------------------------------------------------------------------------------------ TOTAL U.S. GOVERNMENT AND AGENCY OBLIGATIONS (Cost $30,494,646) $30,562,985 ------------------------------------------------------------------------------------------------ TEMPORARY CASH INVESTMENT -- 12.7% REPURCHASE AGREEMENT -- 12.7% 5,600,000 $5,600,000 RBC Capital Markets LLC, 0.27%, dated 2/29/16 plus accrued interest on 3/1/16 collateralized by the following: $2,230,528 Freddie Mac Giant, 3.00-4.00%, 7/1/44-2/1/46 $225,173 Federal Home Loan Mortgage Corp., 2.209-2.444%, 3/1/40-2/1/46 $200,896 Federal National Mortgage Association (ARM), 2.011-4.865%, 9/1/33-11/1/46 $3,055,404 Federal National Mortgage Association, 3.5-4.5%, 6/1/28-2/1/46 $ 5,600,000 ------------------------------------------------------------------------------------------------ TOTAL TEMPORARY CASH INVESTMENT (Cost $5,600,000) $ 5,600,000 ------------------------------------------------------------------------------------------------ The accompanying notes are an integral part of these financial statements. Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 19 Schedule of Investments | 2/29/16 (unaudited) (continued) --------------------------------------------------------------------------------------------------- Number of Expiration Contracts Description Counterparty Strike Price Date Value --------------------------------------------------------------------------------------------------- PUT OPTIONS PURCHASED -- 1.0% 104 S&P500 EMINI Citibank NA $1,610 4/15/16 $ 21,580 110 S&P500 EMINI Citibank NA 1,410 6/17/16 34,100 110 S&P500 EMINI Citibank NA 1,710 6/17/16 159,500 104 S&P500 EMINI Citibank NA 1,910 4/15/16 245,960 ----------- $ 461,140 --------------------------------------------------------------------------------------------------- TOTAL PUT OPTIONS PURCHASED (Premiums paid $686,998) $ 461,140 --------------------------------------------------------------------------------------------------- TOTAL INVESTMENT IN SECURITIES -- 107.4% (Cost $47,950,792) (a) $47,533,203 --------------------------------------------------------------------------------------------------- PUT OPTIONS WRITTEN -- (0.7)% (104) S&P500 EMINI Citibank NA $1,810 4/15/16 $ (110,760) (110) S&P500 EMINI Citibank NA 1,610 6/17/16 (95,700) (110) S&P500 EMINI Citibank NA 1,510 6/17/16 (57,750) (104) S&P500 EMINI Citibank NA 1,710 4/15/16 (48,360) ----------- $ (312,570) --------------------------------------------------------------------------------------------------- TOTAL PUT OPTIONS WRITTEN (Premiums received $(530,421)) $ ( 312,570) --------------------------------------------------------------------------------------------------- OTHER ASSETS & LIABILITIES -- (6.7)% $(2,979,949) --------------------------------------------------------------------------------------------------- TOTAL NET ASSETS -- 100.0% $44,240,684 =================================================================================================== (144A) Security is exempt from registration under Rule 144A of the Securities Act of 1933. Such securities may be resold normally to qualified institutional buyers in a transaction exempt from registration. At February 29, 2016, the value of these securities amounted to $5,215,493 or 11.8% of total net assets. (Cat Bond) Catastrophe or Event Linked Bond. At February 29, 2016, the value of these securities amounted to $750,000, or 1.7% of total net assets. See Notes to Financial Statements -- Note 1J. (Perpetual) Security with no stated maturity date. (Step) Bond issued with an initial coupon rate which converts to a higher rate at a later date. REMICS Real Estate Mortgage Investment Conduits. ARM Adjustable Rate Mortgage. (a) At February 29, 2016, the net unrealized depreciation on investments based on cost for federal income tax purposes of $47,956,437 was as follows: Aggregate gross unrealized appreciation for all investments in which there is an excess of value over tax cost $ 111,883 Aggregate gross unrealized depreciation for all investments in which there is an excess of tax cost over value (535,117) --------- Net unrealized depreciation $(423,234) ========= (b) Debt obligation with a variable interest rate. Rate shown is rate at end of period. (c) Security issued with a zero coupon. Income is earned through accretion of discount. (d) All or a portion of this security has been pledged in connection with open futures and swap contracts. NOTE: Principal amounts are denominated in U.S. Dollars unless otherwise noted: INR Indian Rupee The accompanying notes are an integral part of these financial statements. 20 Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 Purchases and sales of securities (excluding temporary cash investments) for the six months ended February 29, 2016 were as follows: -------------------------------------------------------------------------------------- Purchases Sales -------------------------------------------------------------------------------------- Long-Term U.S. Government Securities $11,256,864 $5,525,791 Other Long-Term Securities $ 8,767,660 $8,065,195 CENTRALLY CLEARED CREDIT DEFAULT SWAP AGREEMENTS -- BUY PROTECTION ----------------------------------------------------------------------------------------------------------- Notional Obligation Expiration Premiums Unrealized Principal ($) Exchange Entity/Index Coupon Date (Received) Appreciation ----------------------------------------------------------------------------------------------------------- (734,400) Chicago Markit CDX North 5.00% 12/20/18 $(145,411) $ 36,831 Mercentile America High Exchange Yield Index (1,483,500) Chicago Markit CDX North 5.00% 12/20/16 (88,417) 44,211 Mercentile America High Exchange Yield Index (27,410,000) Chicago Markit CDX North 5.00% 12/20/20 (312,830) 290,792 Mercentile America High Exchange Yield Index EUR (1,352,083) Chicago Markit iTraxx 5.00% 6/20/19 (196,916) 81,038 Mercentile Europe Crossover Exchange Index ----------------------------------------------------------------------------------------------------------- Total $(743,574) $ 452,872 =========================================================================================================== NOTE: Principal amounts are denominated in U.S. dollars unless otherwise noted: EUR Euro CREDIT DEFAULT SWAP AGREEMENTS -- BUY PROTECTION ------------------------------------------------------------------------------------------------------------- Net Premiums Unrealized Notional Obligation Expiration Paid Appreciation Principal ($) Counterparty Entity/Index Coupon Date (Received) (Depreciation) ------------------------------------------------------------------------------------------------------------- (187,500) Barclays Morgan Stanley 1.00% 12/20/20 $ (1,303) $ 2,096 Bank Plc (165,000) Barclays Morgan Stanley 1.00% 12/20/20 (899) 2,015 Bank Plc (850,000) Barclays Republic of Turkey 1.00% 12/20/20 62,906 7,147 Bank Plc (825,000) Barclays Republic of Turkey 1.00% 12/20/20 61,462 6,531 Bank Plc EUR (630,000) Goldman Sachs Barclays Bank Plc 1.00% 12/20/20 77,671 (29,328) International EUR (630,000) Goldman Sachs HSBC Holdings Plc 1.00% 12/20/20 71,217 (30,776) International (335,200) Goldman Sachs MBIA, Inc. 5.00% 12/20/20 97,208 40,491 International EUR (1,450,000) Goldman Sachs Norske 5.00% 9/20/17 779,624 (150,662) International Skogindustrier ASA The accompanying notes are an integral part of these financial statements. Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 21 Schedule of Investments | 2/29/16 (unaudited) (continued) CREDIT DEFAULT SWAP AGREEMENTS -- BUY PROTECTION (continued) ------------------------------------------------------------------------------------------------------------- Net Premiums Unrealized Notional Obligation Expiration Paid Appreciation Principal ($) Counterparty Entity/Index Coupon Date (Received) (Depreciation) ------------------------------------------------------------------------------------------------------------- (187,500) JPMorgan Bank of America 1.00% 12/20/20 $ (1,866) $ 2,215 Chase Bank NA Corp. (202,500) JPMorgan Bank of America 1.00% 12/20/20 (1,810) 2,187 Chase Bank NA Corp. (187,500) JPMorgan Citigroup, Inc. 1.00% 12/20/20 (1,116) 1,205 Chase Bank NA (202,500) JPMorgan Citigroup, Inc. 1.00% 12/20/20 (901) 997 Chase Bank NA EUR (450,000) JPMorgan Credit Agricole S.A. 1.00% 12/20/20 (5,672) 6,062 Chase Bank NA EUR (445,000) JPMorgan ING Groep N.V. 1.00% 12/20/20 (7,934) 2,747 Chase Bank NA ------------------------------------------------------------------------------------------------------------- Total $1,128,587 $(137,073) ============================================================================================================= NOTE: Principal amounts are denominated in U.S. dollars unless otherwise noted: EUR Euro CENTRALLY CLEARED CREDIT DEFAULT SWAP AGREEMENTS -- SELL PROTECTION ------------------------------------------------------------------------------------------------------------- Net Unrealized Notional Obligation Credit Expiration Premiums Appreciation Principal ($)(1) Exchange Entity/Index Coupon Rating(2) Date (Paid) (Depreciation) ------------------------------------------------------------------------------------------------------------- 645,000 Chicago Markit CDX North 5.00% BBB+ 12/20/17 $ (31,605) $ (60,250) Mercentile America Exchange Investment Grade Index 400,000 Chicago Markit CDX North 5.00% BBB+ 12/20/17 (14,500) (47,464) Mercentile America Exchange Investment Grade Index EUR 1,250,000 Chicago Markit iTraxx 1.00% BBB+ 6/20/19 $ (108,271) $ 27,962 Mercentile Europe index Exchange ------------------------------------------------------------------------------------------------------------- Total $ (154,376) $ (79,752) ============================================================================================================= (1) The notional amount is the maximum amount that a seller of credit protection would be obligated to pay upon occurrence of a credit event. (2) Based on Standard & Poor's rating of the issuer or weighted average of all the underlying securities of the index. NOTE: Principal amounts are denominated in U.S. Dollars unless otherwise noted: EUR Euro The accompanying notes are an integral part of these financial statements. 22 Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 CREDIT DEFAULT SWAP AGREEMENTS -- SELL PROTECTION ------------------------------------------------------------------------------------------------------------------------ Net Premiums Unrealized Notional Obligation Credit Expiration Received Appreciation Principal ($)(1) Counterparty Entity/Index Coupon Rating(2) Date (Paid) (Depreciation) ------------------------------------------------------------------------------------------------------------------------ 1,410,000 Barclays Frontier 5.00% BB- 12/20/20 $ (76,086) $ 49,570 Bank Plc Communications Corp. 545,000 Barclays Hovnanian 5.00% B- 12/20/16 (27,250) 8,183 Bank Plc Enterprises, Inc. 280,000 Barclays Hovnanian 5.00% B- 12/20/16 (13,300) 7,043 Bank Plc Enterprises, Inc. 235,000 Barclays iHeartMedia, Inc. 5.00% CCC 12/20/16 (57,575) (13,189) Bank Plc 365,000 Barclays iHeartMedia, Inc. 5.00% CCC 12/20/16 (109,500) (410) Bank Plc 1,325,000 Barclays Teck Resources, 5.00% B+ 12/20/16 (44,719) 43,883 Bank Plc Ltd. 540,000 Barclays The McClatchy 5.00% B- 6/20/16 -- 7,838 Bank Plc Co. 485,000 Barclays Toys R Us, Inc. 5.00% B- 3/20/16 (2,425) 6,263 Bank Plc 655,000 Barclays Weatherford 1.00% BB+ 12/20/16 (26,200) (6,730) Bank Plc International Plc 540,000 Goldman Hovnanian 5.00% B- 12/20/16 (18,900) 8 Sachs Enterprises, Inc. International 1,080,000 Goldman AK Steel Holding 5.00% B- 12/20/16 (27,000) (13,026) Sachs Corp. International 310,000 Goldman AK Steel Holding 5.00% B- 12/20/16 (24,025) 12,536 Sachs Corp. International 675,000 Goldman Ally Financial Inc. 5.00% BB+ 12/20/20 108,858 (39,887) Sachs International 900,000 Goldman Bombardier 5.00% BBB+ 12/20/16 (17,114) 21,644 Sachs Capital, Inc. International 430,000 Goldman Bombardier 5.00% BBB+ 12/20/16 (1,075) 3,239 Sachs Capital, Inc. International 825,000 Goldman iHeartMedia, Inc. 5.00% CCC 12/20/16 (45,375) (203,052) Sachs International 335,200 Goldman MBIA, Inc. 5.00% A- 12/20/16 (38,548) (19,373) Sachs International EUR 225,000 Goldman Norske 5.00% CC 3/20/16 (4,933) (9,961) Sachs Skogindustrier ASA International The accompanying notes are an integral part of these financial statements. Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 23 Schedule of Investments | 2/29/16 (unaudited) (continued) CREDIT DEFAULT SWAP AGREEMENTS -- SELL PROTECTION (continued) ------------------------------------------------------------------------------------------------------------------------ Net Premiums Unrealized Notional Obligation Credit Expiration Received Appreciation Principal ($)(1) Counterparty Entity/Index Coupon Rating(2) Date (Paid) (Depreciation) ------------------------------------------------------------------------------------------------------------------------ EUR 1,450,000 Goldman Norske 5.00% CC 9/20/20 $(1,153,194) $ (111,588) Sachs Skogindustrier ASA International 140,000 Goldman Peabody Energy 5.00% D 3/20/16 (10,500) (11,839) Sachs Corporation International 650,000 Goldman Petroleo 1.00% B+ 12/20/16 (24,977) 508 Sachs Brasileiro SA International 450,000 JPMorgan Ally Financial Inc. 5.00% BB+ 12/20/20 57,693 (11,712) Chase Bank NA 135,000 JPMorgan Ally Financial Inc. 5.00% BB+ 12/20/20 6,129 7,666 Chase Bank NA 525,000 Morgan J.C. Penney 5.00% CCC+ 12/20/16 (15,750) 35,145 Stanley Company, Inc. Capital Services LLC 820,000 Morgan Sears Holdings 5.00% CCC+ 12/20/16 (22,550) (53,408) Stanley Corporation Capital Services LLC ------------------------------------------------------------------------------------------------------------------------ Total $(1,588,316) $ (290,649) ======================================================================================================================== (1) The notional amount is the maximum amount that a seller of credit protection would be obligated to pay upon occurrence of a credit event. (2) Based on Standard & Poor's rating of the issuer or weighted average of all the underlying securities of the index. NOTE: Principal amounts are denominated in U.S. Dollars unless otherwise noted: EUR Euro INTEREST RATE SWAP AGREEMENTS ------------------------------------------------------------------------------------------------------------------------ Annual Net Notional Pay / Floating Fixed Expiration Premiums Unrealized Principal ($) Counterparty Receive Rate Rate Date Paid Depreciation ------------------------------------------------------------------------------------------------------------------------ (442,126) JPMorgan Receive LIBOR USD 1.819% 8/7/19 $ 2 $ (12,876) Chase 3 Month Bank NA (850,473) JPMorgan Receive LIBOR USD 2.202% 5/6/25 7 (55,617) Chase 3 Month Bank NA ------------------------------------------------------------------------------------------------------------------------ Total $ 9 $ (68,493) ======================================================================================================================== The accompanying notes are an integral part of these financial statements. 24 Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 TOTAL RETURN SWAP AGREEMENTS ------------------------------------------------------------------------------------------------------------------------ Obligation Notional Pay / Entity/ Expiration Unrealized Principal ($) Counterparty Receive Index Coupon Date (Depreciation) ------------------------------------------------------------------------------------------------------------------------ 8,665,000 JPMorgan Pay iBoxx USD Liquid LIBOR USD 3/20/16 $ (194,246) Chase Bank NA High Yield Index 3 Month 8,665,000 JPMorgan Pay iBoxx USD Liquid LIBOR USD 3/20/16 (180,151) Chase Bank NA High Yield Index 3 Month 4,335,000 JPMorgan Pay iBoxx USD Liquid LIBOR USD 3/20/16 (90,127) Chase Bank NA High Yield Index 3 Month 4,335,000 JPMorgan Pay iBoxx USD Liquid LIBOR USD 3/20/16 (95,110) Chase Bank NA High Yield Index 3 Month ------------------------------------------------------------------------------------------------------------------------ Total $ (559,634) ======================================================================================================================== Various inputs are used in determining the value of the Fund's investments. These inputs are summarized in the three broad levels listed below. Level 1 - quoted prices in active markets for identical securities. Level 2 - other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.) See Notes to Financial Statements -- Note 1A. Level 3 - significant unobservable inputs (including the Fund's own assumptions in determining fair value of investments) See Notes to Financial Statements -- Note 1A. The following is a summary of the inputs used as of February 29, 2016, in valuing the Fund's assets: -------------------------------------------------------------------------------- Level 1 Level 2 Level 3 Total -------------------------------------------------------------------------------- Preferred Stock $520,405 $ -- $ -- $ 520,405 Asset Backed Securities -- 1,260,837 -- 1,260,837 Collateralized Mortgage Obligations -- 1,188,702 -- 1,188,702 Corporate Bonds -- 7,939,134 -- 7,939,134 U.S. Government and Agency Obligations -- 30,562,985 -- 30,562,985 Repurchase Agreement -- 5,600,000 -- 5,600,000 Put Options Purchased 461,140 -- -- 461,140 -------------------------------------------------------------------------------- Total $981,545 $ 46,551,658 $ -- $47,533,203 ================================================================================ The accompanying notes are an integral part of these financial statements. Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 25 Schedule of Investments | 2/29/16 (unaudited) (continued) ---------------------------------------------------------------------------------- Level 1 Level 2 Level 3 Total ---------------------------------------------------------------------------------- Other Financial Instruments Net Unrealized Depreciation on Credit Default Swaps $ -- $ (54,602) $ -- $ (54,602) Unrealized Depreciation on Interest Rate Swaps -- (68,493) -- (68,493) Unrealized Depreciation on Total Return Swaps -- (559,634) -- (559,634) Put Options Written (312,570) -- -- (312,570) Unrealized Appreciation on Futures Contracts 5,469 -- -- 5,469 Unrealized Appreciation on Forward Foreign Currency Contracts -- 46,609 -- 46,609 Unrealized Depreciation on Forward Foreign Currency Contracts -- (48,168) -- (48,168) ---------------------------------------------------------------------------------- Total Other Financial Instruments $ (307,101) $ (684,288) $ -- $ (991,389) ================================================================================== During the six months ended February 29, 2016, there were no transfers between Levels 1, 2 and 3. The following is a summary of the fair valuation of certain Fund's assets as of February 29, 2016: --------------------------------------------------------------------------------- Level 1 Level 2 Level 3 Total --------------------------------------------------------------------------------- Assets: Foreign currencies, at value (cost $6,174) $ -- $ 1,882 $ -- $ 1,882 Restricted cash -- 337,299 -- 337,299 Variation margin for centrally cleared swap contracts -- 101,773 -- 101,773 Liabilities: Variation margin for futures contracts (5,469) -- -- (5,469) --------------------------------------------------------------------------------- Total $ (5,469) $440,954 $ -- $435,485 ================================================================================= The accompanying notes are an integral part of these financial statements. 26 Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 Statement of Assets and Liabilities | 2/29/16 (unaudited) ASSETS: Investment in securities (cost $42,350,792) $41,933,203 Repurchase agreements (cost $5,600,000) 5,600,000 Total investment in securities (cost $47,950,792) 47,533,203 ------------------------------------------------------------------------------------ Foreign currencies, at value (cost $6,174) 1,882 Restricted Cash* 337,299 Receivables -- Fund shares sold 4,704 Swap payments 178,001 Interest 110,333 Due from Pioneer Investment Management, Inc. 38,593 Variation margin for centrally cleared swap contracts 101,773 Unrealized appreciation on forward foreign currency contracts 46,609 Unrealized appreciation on futures contracts 5,469 Other assets 29,039 ------------------------------------------------------------------------------------ Total assets $48,386,905 ==================================================================================== LIABILITIES: Payables -- Investment securities purchased $ 657,922 Fund shares repurchased 702,341 Trustee fees 1,239 Distributions 8 Due to custodian 263,309 Unrealized depreciation on forward foreign currency contracts 48,168 Net unrealized depreciation on swap contracts 682,729 Variation margin on futures contracts 5,469 Swap contracts, net premiums received 1,357,670 Written options (premiums received $530,421) 312,570 Due to affiliates 38,035 Accrued expenses 76,761 ------------------------------------------------------------------------------------ Total liabilities $ 4,146,221 ==================================================================================== NET ASSETS: Paid-in capital $48,871,326 Undistributed net investment income 18,322 Accumulated net realized loss on investments, futures contracts, written options, swap contracts, and foreign currency transactions (3,778,304) Net unrealized depreciation on investments (417,589) Unrealized appreciation on futures contracts 5,469 Net unrealized appreciation on written options 217,851 Net unrealized depreciation on swap contracts (682,729) Net unrealized appreciation on forward foreign currency contracts and other assets and liabilities denominated in foreign currencies 6,338 ------------------------------------------------------------------------------------ Total net assets $44,240,684 ==================================================================================== NET ASSET VALUE PER SHARE: (No par value, unlimited number of shares authorized) Class A (based on $11,023,624/1,201,373 shares) $ 9.18 Class C (based on $9,129,100/1,000,055 shares) $ 9.13 Class Y (based on $24,087,960/2,615,231 shares) $ 9.21 MAXIMUM OFFERING PRICE: Class A ($9.18 / 95.5%) $ 9.61 ==================================================================================== The accompanying notes are an integral part of these financial statements. * Represents restricted cash deposited at the counterparty for derivative contracts. Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 27 Statement of Operations (unaudited) For the Six Months Ended 2/29/16 INVESTMENT INCOME: Dividends $ 16,476 Interest 513,761 ---------------------------------------------------------------------------------------------------------- Total investment income $ 530,237 ---------------------------------------------------------------------------------------------------------- EXPENSES: Management fees $ 265,891 Distribution fees Class A 15,981 Class C 46,508 Transfer Agent fees Class A 665 Class C 380 Class Y 751 Shareholder communications expense 6,258 Administrative expense 15,501 Custodian fees 27,807 Registration fees 25,802 Professional fees 61,267 Printing fees 7,846 Pricing fees 17,092 Fees and expenses of nonaffiliated Trustees 3,604 Miscellaneous 2,162 ---------------------------------------------------------------------------------------------------------- Total expenses $ 497,515 ---------------------------------------------------------------------------------------------------------- Less fees waived and expenses reimbursed by Pioneer Investment Management, Inc. (105,826) ---------------------------------------------------------------------------------------------------------- Net expenses $ 391,689 ---------------------------------------------------------------------------------------------------------- Net investment income $ 138,548 ---------------------------------------------------------------------------------------------------------- REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS, FUTURES CONTRACTS, WRITTEN OPTIONS, SWAP CONTRACTS AND FOREIGN CURRENCY TRANSACTIONS: Net realized gain (loss) on: Investments $ (997,414) Futures contracts (347,611) Written options 441,762 Swap contracts (1,905,228) Forward foreign currency contracts and other assets and liabilities denominated in foreign currencies (62,757) $ (2,871,248) ---------------------------------------------------------------------------------------------------------- Change in net unrealized appreciation (depreciation) on: Investments $ (664,590) Futures contracts 6,016 Written options 495,804 Swap contracts (415,416) Forward foreign currency contracts and other assets and liabilities denominated in foreign currencies (5,601) $ (583,787) ---------------------------------------------------------------------------------------------------------- Net realized and unrealized gain (loss) on investments, futures contracts, written options, swap contracts, and foreign currency transactions $ (3,455,035) ---------------------------------------------------------------------------------------------------------- Net decrease in net assets resulting from operations $ (3,316,487) ========================================================================================================== The accompanying notes are an integral part of these financial statements. 28 Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 Statements of Changes in Net Assets ------------------------------------------------------------------------------------------------ Six Months Ended 2/29/16 Year Ended (unaudited) 8/31/15 ------------------------------------------------------------------------------------------------ FROM OPERATIONS: Net investment income (loss) $ 138,548 $ (15,709) Net realized gain (loss) on investments, futures contracts, written options, swap contracts, and foreign currency transactions (2,871,248) 702,871 Change in net unrealized appreciation (depreciation) on investments, futures contracts, written options, swap contracts, and foreign currency transactions (583,787) (816,462) ------------------------------------------------------------------------------------------------ Net decrease in net assets resulting from operations $ (3,316,487) $ (129,300) ------------------------------------------------------------------------------------------------ DISTRIBUTIONS TO SHAREOWNERS: Net investment income: Class A ($0.16 and $0.21 per share, respectively) $ (225,972) $ (183,685) Class C ($0.10 and $0.16 per share, respectively) (99,820) (139,321) Class Y ($0.15 and $0.23 per share, respectively) (471,932) (194,215) ------------------------------------------------------------------------------------------------ Total distributions to shareowners $ (797,724) $ (517,221) ------------------------------------------------------------------------------------------------ FROM FUND SHARE TRANSACTIONS: (a)(b) Net proceeds from sale of shares $ 3,554,269 $28,019,541 Reinvestment of distributions 508,569 517,221 Cost of shares repurchased (7,589,063) (1,507,006) ------------------------------------------------------------------------------------------------ Net increase (decrease) in net assets resulting from Fund share transactions $ (3,526,225) $27,029,756 ------------------------------------------------------------------------------------------------ Net increase (decrease) in net assets $ (7,640,436) $26,383,235 NET ASSETS: Beginning of period $ 51,881,120 $25,497,885 ------------------------------------------------------------------------------------------------ End of period $ 44,240,684 $51,881,120 ------------------------------------------------------------------------------------------------ Undistributed net investment income $ 18,322 $ 677,498 ================================================================================================ (a) At February 29, 2016, PIM owned 53.7% of the value of the outstanding shares of Pioneer Long/Short Bond Fund. (b) At February 29, 2016, Pioneer Asset Allocation Trust owned 29.5% of the value of outstanding shares of Pioneer Long/Short Bond Fund. The accompanying notes are an integral part of these financial statements. Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 29 Statements of Changes in Net Assets (continued) ------------------------------------------------------------------------------------ Six Months Six Months Ended Ended Year Year 2/29/16 2/29/16 Ended Ended Shares Amount 8/31/15 8/31/15 (unaudited) (unaudited) Shares Amount ------------------------------------------------------------------------------------ Class A Shares sold 144,271 $ 1,396,920 572,122 $ 5,771,154 Reinvestment of distributions 24,298 225,972 18,675 183,683 Less shares repurchased (282,005) (2,568,576) (131,947) (1,316,466) ------------------------------------------------------------------------------------ Net increase (decrease) (113,436) $ (945,684) 458,850 $ 4,638,371 ==================================================================================== Class C Shares sold 20,722 $ 195,879 131,285 $ 1,318,030 Reinvestment of distributions 10,780 99,820 14,202 139,323 Less shares repurchased (5,159) (48,039) (11,518) (113,947) ------------------------------------------------------------------------------------ Net increase 26,343 $ 247,660 133,969 $ 1,343,406 ==================================================================================== Class Y Shares sold 202,014 $ 1,961,470 2,074,561 $20,930,357 Reinvestment of distributions 19,590 182,777 19,737 194,215 Less shares repurchased (536,595) (4,972,448) (7,689) (76,593) ------------------------------------------------------------------------------------ Net increase (decrease) (314,991) $ (2,828,201) 2,086,609 $21,047,979 ==================================================================================== The accompanying notes are an integral part of these financial statements. 30 Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 Financial Highlights ------------------------------------------------------------------------------------------------ Six Months Ended 2/29/16 Year Ended 12/30/13 (unaudited) 8/31/15 to 8/31/14 ------------------------------------------------------------------------------------------------ Class A Net asset value, beginning of period $ 9.95 $ 10.05 $ 10.00 ------------------------------------------------------------------------------------------------ Increase (decrease) from investment operations: Net investment income (loss) $ 0.03(a) $ 0.08 $ (0.02) Net realized and unrealized gain (loss) on investments (0.64) 0.03 0.07 ------------------------------------------------------------------------------------------------ Net increase (decrease) from investment operations $ (0.61) $ 0.11 $ 0.05 ------------------------------------------------------------------------------------------------ Distribution to shareowners: Net investment income $ (0.16) $ (0.21) $ -- ------------------------------------------------------------------------------------------------ Net increase (decrease) in net asset value $ (0.77) $ (0.10) $ 0.05 ------------------------------------------------------------------------------------------------ Net asset value, end of period $ 9.18 $ 9.95 $ 10.05 ================================================================================================ Total return* (6.16)% 1.14% 0.50%*** Ratio of net expenses to average net assets 1.55%** 1.55% 1.55%** Ratio of net investment income (loss) to average net assets 0.54%** 0.12% (0.27)%** Portfolio turnover rate 75%** 176% 65%** Net assets, end of period (in thousands) $11,024 $13,076 $ 8,604 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses to average net assets 2.00%** 2.31% 2.74%** Net investment income (loss) to average net assets 0.09%** (0.64)% (1.46)%** ================================================================================================ * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period and no sales charges. Total return would be reduced if sales charges were taken into account. ** Annualized. *** Not Annualized. (a) The per share data presented above is based on the average shares outstanding for the period presented. The accompanying notes are an integral part of these financial statements. Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 31 Financial Highlights (continued) ------------------------------------------------------------------------------------------------ Six Months Ended 2/29/16 Year Ended 12/30/13 (unaudited) 8/31/15 to 8/31/14 ------------------------------------------------------------------------------------------------ Class C Net asset value, beginning of period $ 9.87 $ 10.00 $ 10.00 ------------------------------------------------------------------------------------------------ Increase (decrease) from investment operations: Net investment income (loss) $ (0.01)(a)(b) $ (0.02) $ (0.07) Net realized and unrealized gain (loss) on investments (0.63) 0.05 0.07 ------------------------------------------------------------------------------------------------ Net increase (decrease) from investment operations $ (0.64) $ 0.03 $ -- ------------------------------------------------------------------------------------------------ Distribution to shareowners: Net investment income $ (0.10) $ (0.16) $ -- ------------------------------------------------------------------------------------------------ Net increase (decrease) in net asset value $ (0.74) $ (0.13) $ -- ------------------------------------------------------------------------------------------------ Net asset value, end of period $ 9.13 $ 9.87 $ 10.00 ================================================================================================ Total return* (6.49)% 0.34% 0.00%*** Ratio of net expenses to average net assets 2.30%** 2.30% 2.30%** Ratio of net investment income (loss) to average net assets (0.21)%** (0.51)% (1.03)%** Portfolio turnover rate 75%** 176% 65%** Net assets, end of period (in thousands) $ 9,129 $ 9,606 $ 8,399 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses to average net assets 2.71%** 3.06% 3.48%** Net investment income (loss) to average net assets (0.61)%** (1.27)% (2.21)%** ================================================================================================ * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period and no sales charges. Total return would be reduced if sales charges were taken into account. ** Annualized. *** Not Annualized. (a) The per share data presented above is based on the average shares outstanding for the period presented. (b) The amount shown for a share outstanding does not correspond with net investment income on the Statement of Operations for the period due to timing of the sales and repurchase of shares. The accompanying notes are an integral part of these financial statements. 32 Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 ------------------------------------------------------------------------------------------------ Six Months Ended 2/29/16 Year Ended 12/30/13 (unaudited) 8/31/15 to 8/31/14 ------------------------------------------------------------------------------------------------ Class Y Net asset value, beginning of period $ 9.97 $ 10.07 $ 10.00 ------------------------------------------------------------------------------------------------ Increase (decrease) from investment operations: Net investment income (loss) $ 0.04(b) $ 0.15 $ (0.00)(a) Net realized and unrealized gain (loss) on investments (0.65) (0.02) 0.07 ------------------------------------------------------------------------------------------------ Net increase (decrease) from investment operations $ (0.61) $ 0.13 $ 0.07 ------------------------------------------------------------------------------------------------ Distribution to shareowners: Net investment income $ (0.15) $ (0.23) $ -- ------------------------------------------------------------------------------------------------ Net increase (decrease) in net asset value $ (0.76) $ (0.10) $ 0.07 ------------------------------------------------------------------------------------------------ Net asset value, end of period $ 9.21 $ 9.97 $ 10.07 ================================================================================================ Total return* (6.10)% 1.32% 0.70%*** Ratio of net expenses to average net assets 1.30%** 1.30% 1.30%** Ratio of net investment income (loss) to average net assets 0.79%** 0.14% (0.02)%** Portfolio turnover rate 75%** 176% 65%** Net assets, end of period (in thousands) $24,088 $29,200 $ 8,494 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses to average net assets 1.71%** 2.04% 2.48%** Net investment income (loss) to average net assets 0.39%** (0.60)% (1.20)%** ================================================================================================ * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period and no sales charges. ** Annualized. *** Not Annualized. (a) Amount rounds to less than $0.01 or $(0.01) per share. (b) The per share data presented above is based on the average shares outstanding for the period presented. The accompanying notes are an integral part of these financial statements. Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 33 Notes to Financial Statements | 2/29/16 (unaudited) 1. Organization and Significant Accounting Policies Pioneer Long/Short Bond Fund, (formerly, Pioneer Long/Short Global Bond Fund) (the Fund), is one of five portfolios comprising Pioneer Series Trust V, a Delaware statutory trust. The Fund is registered under the Investment Company Act of 1940 as a non-diversified, open-end management investment company. The Fund's investment objective is to seek total return. The Fund offers three classes of shares designated as Class A, Class C, and Class Y shares. Class A, Class C and Class Y shares commenced operations on December 30, 2013. Each class of shares represents an interest in the same portfolio of investments of the Fund and has identical rights (based on relative net asset values) to assets and liquidation proceeds. Share classes can bear different rates of class-specific fees and expenses such as transfer agent and distribution fees. Differences in class-specific fees and expenses will result in differences in net investment income and, therefore, the payment of different dividends from net investment income earned by each class. The Amended and Restated Declaration of Trust of the Fund gives the Board the flexibility to specify either per-share voting or dollar-weighted voting when submitting matters for shareholder approval. Under per-share voting, each share of a class of the Fund is entitled to one vote. Under dollar-weighted voting, a shareholder's voting power is determined not by the number of shares owned, but by the dollar value of the shares on the record date. Each share class has exclusive voting rights with respect to matters affecting only that class, including with respect to the distribution plan for that class. There is no distribution plan for Class Y shares. The Fund's financial statements have been prepared in conformity with U.S. generally accepted accounting principles that require the management of the Fund to, among other things, make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of income, expenses and gains and losses on investments during the reporting period. Actual results could differ from those estimates. The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements: A. Security Valuation The net asset value of the Fund is computed once daily, on each day the New York Stock Exchange (NYSE) is open, as of the close of regular trading on the NYSE. 34 Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 Fixed income securities are valued by using prices supplied by independent pricing services, which consider such factors as market prices, market events, quotations from one or more brokers, Treasury spreads, yields, maturities and ratings, or may use a pricing matrix or other fair value methods or techniques to provide an estimated value of the security or instrument. A pricing matrix is a means of valuing a debt security on the basis of current market prices for other debt securities, historical trading patterns in the market for fixed income securities and/or other factors. Valuations may be supplemented by dealers and other sources, as required. Non-U.S. debt securities that are listed on an exchange will be valued at the bid price obtained from an independent third party pricing service. Event-linked bonds or catastrophe bonds are valued at the bid price obtained from an independent third party pricing service. Other insurance linked securities (including sidecars, collateralized reinsurance and industry loss warranties) may be valued at the bid price obtained from an independent pricing service, or through a third party using a pricing matrix, insurance industry valuation models, or other fair value methods or techniques to provide an estimated value of the instrument. Equity securities that have traded on an exchange are valued by using the last sale price on the principal exchange where they are traded. Equity securities that have not traded on the date of valuation, or securities for which sale prices are not available, generally are valued using the mean between the last bid and asked prices or, if both last bid and asked prices are not available, at the last quoted bid price. Last sale and bid and asked prices are provided by independent third party pricing services. In the case of equity securities not traded on an exchange, prices are typically determined by independent third party pricing services using a variety of techniques and methods. Swap contracts, including interest rate swaps, caps and floors (other than centrally cleared swap contracts) are valued at the dealer quotations obtained from reputable International Swap Dealer association members. Centrally cleared swaps are valued at the daily settlement price provided by the central clearing counterparty. Futures contracts are generally valued at the closing settlement price established by the exchange on which they are traded. Options contracts are generally valued at the mean between the last bid and ask prices on the principal exchange where they are traded. Over-the- counter ("OTC") options and options on swaps ("swaptions") are valued using prices supplied by independent pricing services, which consider such factors as market prices, market events, quotations from one or more Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 35 brokers, Treasury spreads, yields, maturities and ratings, or may use a pricing matrix or other fair value methods or techniques to provide an estimated value of the security or instrument. Forward foreign currency exchange contracts are valued daily using the foreign exchange rate or, for longer term forward contract positions, the spot currency rate, in each case provided by a third party pricing service. Contracts whose forward settlement date falls between two quoted days are valued by interpolation. Securities for which independent pricing services are unable to supply prices or for which market prices and/or quotations are not readily available or are considered to be unreliable are valued by a fair valuation team comprised of certain personnel of Pioneer Investment Management, Inc. (PIM), the Fund's investment adviser, pursuant to procedures adopted by the Fund's Board of Trustees. PIM's fair valuation team uses fair value methods approved by the Valuation Committee of the Board of Trustees. PIM's fair valuation team is responsible for monitoring developments that may impact fair valued securities and for discussing and assessing fair values on an ongoing basis, and at least quarterly, with the Valuation Committee of the Board of Trustees. Inputs used when applying fair value methods to value a security may include credit ratings, the financial condition of the company, current market conditions and comparable securities. The Fund may use fair value methods if it is determined that a significant event has occurred after the close of the exchange or market on which the security trades and prior to the determination of the Fund's net asset value. Examples of a significant event might include political or economic news, corporate restructurings, natural disasters, terrorist activity or trading halts. Thus, the valuation of the Fund's securities may differ significantly from exchange prices and such differences could be material. At February 29, 2016, there were no securities valued using fair value methods (other than securities valued using prices supplied by independent pricing services, broker-dealers or using a third party insurance industry pricing model). B. Investment Income and Transactions Principal amounts of mortgage-backed securities are adjusted for monthly paydowns. Premiums and discounts related to certain mortgage-backed securities are amortized or accreted in proportion to the monthly paydowns. All discounts/premiums on purchase prices of debt securities are accreted/amortized for financial reporting purposes over the life of the respective securities, and such accretion/amortization is included in interest income. 36 Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 Dividend income is recorded on the ex-dividend date except that certain dividends from foreign securities where the ex-dividend date may have passed are recorded as soon as the Fund becomes aware of the ex-dividend data in the exercise of reasonable diligence. Interest income is recorded on the accrual basis. Transaction are recorded as of trade date. Gains and losses on sales of investments are calculated on the identified cost method for both financial reporting and federal income tax purposes. C. Foreign Currency Translation The books and records of the Fund are maintained in U.S. dollars. Amounts denominated in foreign currencies are translated into U.S. dollars using current exchange rates. Net realized gains and losses on foreign currency transactions, if any, represent, among other things, the net realized gains and losses on foreign currency contracts, disposition of foreign currencies and the difference between the amount of income accrued and the U.S. dollars actually received. Further, the effects of changes in foreign currency exchange rates on investments are not segregated in the statement of operations from the effects of changes in the market price of those securities but are included with the net realized and unrealized gain or loss on investments. D. Futures Contracts The Fund may enter into futures transactions in order to attempt to hedge against changes in interest rates, securities prices and currency exchange rates or to seek to increase total return. Futures contracts are types of derivatives. All futures contracts entered into by the Fund are traded on a futures exchange. Upon entering into a futures contract, the Fund is required to deposit with a broker an amount of cash or securities equal to the minimum "initial margin" requirements of the associated futures exchange. The amount of cash deposited with the broker as collateral at February 29, 2016 was $316,981 and is recorded within "Restricted Cash" on the Statement of Assets and Liabilities. Subsequent payments for futures contracts ("variation margin") are paid or received by the Fund, depending on the daily fluctuation in the value of the contracts, and are recorded by the Fund as unrealized appreciation or depreciation. When the contract is closed, the Fund realizes a gain or loss equal to the difference between the opening and closing value of the contract as well as any fluctuation in foreign currency exchange rates where applicable. The use of futures contracts involves, to varying degrees, elements of market, interest rate, currency exchange rate and counterparty risks, which may exceed the amount recognized by the Fund. Changes in Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 37 value of the contracts may not directly correlate to the changes in value of the underlying securities. The average value of contracts open during the six months ended February 29, 2016 was $(3,395,769). At February 29, 2016, open futures contracts were as follows: ------------------------------------------------------------------------------------ Number of Contracts Settlement Unrealized Type Counterparty Long/(Short) Month/Year Value Appreciation ------------------------------------------------------------------------------------ U.S. 10 Year Note Citigroup NA (10) 6/16 $(1,305,156) $1,719 U.S. Ultra Bond Citigroup NA (10) 6/16 $(1,731,563) $3,750 ------------------------------------------------------------------------------------ Total $(3,036,719) $5,469 ==================================================================================== E. Forward Foreign Currency Contracts The Fund may enter into forward foreign currency contracts (contracts) for the purchase or sale of a specific foreign currency at a fixed price on a future date. All contracts are marked to market daily at the applicable exchange rates, and any resulting unrealized appreciation or depreciation is recorded in the Fund's financial statements. The Fund records realized gains and losses at the time a contract is offset by entry into a closing transaction or extinguished by delivery of the currency. Risks may arise upon entering into these contracts from the potential inability of counterparties to meet the terms of the contract and from unanticipated movements in the value of foreign currencies relative to the U.S. dollar (see Note 5). F. Federal Income Taxes It is the Fund's policy to comply with the requirements of the Internal Revenue Code applicable to regulated investment companies and to distribute all of its net taxable income and net realized capital gains, if any, to its shareowners. Therefore, no federal income tax provision is required. As of August 31, 2015, the Fund did not accrue any interest or penalties with respect to uncertain tax positions, which, if applicable, would be recorded as an income tax expense in the Statement of Operations. The amount and character of income and capital gain distributions to shareowners are determined in accordance with federal income tax rules, which may differ from U.S. generally accepted accounting principles. Distributions in excess of net investment income or net realized gains are temporary overdistributions for financial statement purposes resulting from differences in the recognition or classification of income or distributions for financial statement and tax purposes. Capital accounts within the financial statements are adjusted for permanent book/tax differences to reflect tax character, but are not adjusted for temporary differences. 38 Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 The tax character of current year distributions payable will be determined at the end of the current taxable year. The tax character of distributions paid during the fiscal year ended August 31, 2015 was as follows: --------------------------------------------------------------------------- 2015 --------------------------------------------------------------------------- Distributions paid from: Ordinary income $517,221 --------------------------------------------------------------------------- Total $517,221 =========================================================================== The following shows the components of distributable earnings (losses) on a federal income tax basis at August 31, 2015: --------------------------------------------------------------------------- 2015 --------------------------------------------------------------------------- Distributable earnings: Undistributed ordinary income $ 797,526 Capital loss carryforward (864,948) Unrealized depreciation (449,009) --------------------------------------------------------------------------- Total $(516,431) =========================================================================== The difference between book-basis and tax-basis net unrealized depreciation is attributable to the tax deferral of losses on wash sales, adjustments relating to catastrophe bonds, the mark to market of forwards, swaps, options and future contracts. G. Fund Shares The Fund records sales and repurchases of its shares as of trade date. Pioneer Funds Distributor, Inc. (PFD), the principal underwriter for the Fund and a wholly owned indirect subsidiary of UniCredit S.p.A. (UniCredit), earned $41 in underwriting commissions on the sale of Class A shares during the six months ended February 29, 2016. H. Class Allocations Income, common expenses and realized and unrealized gains and losses are calculated at the Fund level and allocated daily to each class of shares based on its respective percentage of adjusted net assets at the beginning of the day. Distribution fees are calculated based on the average daily net asset value attributable to Class A and Class C shares of the Fund, respectively (see Note 4). Class Y shares do not pay distribution fees. All expenses and fees paid to the Fund's transfer agent, for its services are allocated among the classes of shares based on the number of accounts in each class and the ratable allocation of related out-of-pocket expenses (see Note 3). Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 39 Distributions to shareowners are recorded as of the ex-dividend date. Distributions paid by the Fund with respect to each class of shares are calculated in the same manner and at the same time, except that net investment income dividends to Class A, Class C and Class Y shares can reflect different transfer agent and distribution expense rates. I. Risks When interest rates rise, the prices of fixed-income securities in the Fund will generally fall. Conversely, when interest rates fall, the prices of fixed-income securities in the Fund will generally rise. Investments in the Fund are subject to possible loss due to the financial failure of underlying issues and their ability to meet their debt obligations. The Fund's prospectus contains unaudited information regarding the Fund's principal risks. Please refer to that document when considering the Fund's principal risks. J. Insurance Linked Securities (ILS) Event-linked bonds are floating rate debt obligations for which the return of principal and the payment of interest are contingent on the non-occurrence of a pre-defined "trigger" event, such as a hurricane or an earthquake of a specific magnitude. The trigger event's magnitude may be based on losses to a company or industry, industry indexes or readings of scientific instruments, or may be based on specified actual losses. If a trigger event, as defined within the terms of an event-linked bond occurs, the Fund may lose a portion or all of its accrued interest and/or principal invested in such event-linked bond. The Fund is entitled to receive principal and interest payments so long as no trigger event occurs of the description and magnitude specified by the instrument. In addition to the specified trigger events, event-linked bonds may expose the Fund to other risks, including but not limited to issuer (credit) default, adverse regulatory or jurisdictional interpretations and adverse tax consequences. The Fund's investments in ILS may include special purpose vehicles ("SPVs") or similar instruments structured to comprise a portion of a reinsurer's catastrophe-oriented business, known as quota share instruments (sometimes referred to as reinsurance sidecars), or to provide reinsurance relating to specific risks to insurance or reinsurance companies through a collateralized instrument, known as collateralized reinsurance. Structured reinsurance investments also may include industry loss warranties ("ILWs"), are subject to the same risks as event-linked bonds. In addition, because quota share instruments represent an interest in a basket of underlying reinsurance contracts, the Fund has limited transparency into the individual underlying contracts and therefore must rely upon the risk assessment and sound underwriting practices of the issuer. Accordingly, it may be more difficult for 40 Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 PIM to fully evaluate the underlying risk profile of the Fund's investment in quota share instruments and therefore place the Fund's assets at greater risk of loss than if PIM had more complete information. Quota share instruments and other structured reinsurance instruments generally will be considered illiquid securities by the Fund. These securities may be difficult to purchase, sell or unwind. Illiquid securities also may be difficult to value. If the Fund is forced to sell an illiquid asset, the Fund may be forced to sell at a loss. K. Credit Default Swaption Writing The Fund may write put and covered call swaptions on portfolio securities in order to attempt to hedge against changes in the value of portfolio securities or to seek to increase total return. When a swaption is written, the Fund receives a premium and becomes obligated to purchase or sell the underlying security at a fixed price upon the exercise of the swaption. When the Fund writes a swaption, an amount equal to the premium received by the Fund is recorded as a liability and is subsequently adjusted to the current value of the swaption written. Premiums received from writing swaptions that expire unexercised are treated by the Fund on the expiration date as realized gains from investments. The difference between the premium and the amount paid on effecting a closing purchase transaction, including brokerage commissions, is also treated as a realized gain or, if the premium is less than the amount paid for the closing purchase transaction, as a realized loss. If a call swaption is exercised, the premium is added to the proceeds from the sale of the underlying security in determining whether the Fund has realized a gain or loss. The Fund as writer of a swaption bears the market risk of an unfavorable change in the price of the security underlying the written swaption. The Fund had no outstanding written credit default swaption contracts at February 29, 2016. The average value of written swaption contracts open during the six months ended February 29, 2016 was $(14,792). Transactions in written swaptions for the six months ended February 29, 2016 are summarized as follows: ------------------------------------------------------------------------------ Premiums Number of Received/ Contracts Paid ------------------------------------------------------------------------------ Options outstanding at beginning of period -- $ -- Options opened (9,603,000) (77,557) Options exercised -- -- Options closed -- -- Options expired 9,603,000 77,557 ------------------------------------------------------------------------------ Options outstanding at end of period -- $ -- ============================================================================== Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 41 L. Credit Default Swaption Purchased The Fund may purchase put and call swaptions in order to attempt to hedge against changes in the value of portfolio securities or to seek to increase total return. Purchased call and put swaptions entitle the Fund to buy and sell a specified number of shares or units of a particular security, currency or index at a specified price at a specific date or within a specific period of time. Upon the purchase of a call or put swaption, the premium paid by the Fund is included in the Statement of Assets and Liabilities as an investment. All premiums are marked-to-market daily, and any unrealized gains or losses are recorded in the Fund's financial statements. As the purchaser of an index swaption, the Fund has the right to receive a cash payment equal to any depreciation in the value of the index below the strike price of the swaption (in the case of a put) or equal to any appreciation in the value of the index over the strike price of the swaption (in the case of a call) as of the valuation date of the swaption. Premiums paid for purchased calls and put swaptions which have expired are treated as realized losses on investments in the Statement of Operations. Upon the exercise or closing of a purchased put swaption, the premium is offset against the proceeds on the sale of the underlying security or financial instrument in order to determine the realized gain or loss on investments. Upon the exercise or closing of a purchased call swaption, the premium is added to the cost of the security or financial instrument. The risk associated with purchasing swaptions is limited to the premium originally paid. The average value of contracts open during the six months ended February 29, 2016 was $12,962. There were no outstanding purchased credit default swaptions open at February 29, 2016. M. Option Writing The Fund may write put and covered call options to seek to increase total return. When an option is written, the Fund receives a premium and becomes obligated to purchase or sell the underlying security at a fixed price, upon the exercise of the option. When the Fund writes an option, an amount equal to the premium received by the Fund is recorded as a liability and is subsequently adjusted to the current value of the option written. Premiums received from writing options that expire unexercised are treated by the Fund on the expiration date as realized gains from investments. The difference between the premium and the amount paid on effecting a closing purchase transaction, including brokerage commissions, is also treated as a realized gain, or, if the premium is less than the amount paid for the closing purchase transaction, as a realized loss. If a call option is exercised, the premium is added to the proceeds from the sale of the underlying security in determining whether the Fund has realized a gain or loss. The Fund as writer of an option bears the market risk of an unfavorable change in the price of the security underlying the written option. 42 Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 The average value of written options contracts open during the six months ended February 29, 2016 was $(302,809). Written call and put option contracts outstanding at period end are listed at the end of the Fund's schedule of investments. The Fund held four written put option contracts that were open at February 29, 2016. If the put options were exercised at February 29, 2016, the maximum amount the Fund would have been required to pay was $530,421. --------------------------------------------------------------------------- Number of Premiums Contracts Received --------------------------------------------------------------------------- Options outstanding at beginning of period (192) $(237,087) Options opened (636) (772,966) Options exercised 400 479,632 Options closed -- -- Options expired -- -- --------------------------------------------------------------------------- Options outstanding at end of period (428) $(530,421) =========================================================================== N. Options Purchased The Fund may purchase put and call options in order to seek to increase total return. Purchased call and put options entitle the Fund to buy and sell a specified number of shares or units of a particular security, currency or index at a specified price at a specific date or within a specific period of time. Upon the purchase of a call or put option, the premium paid by the Fund is included in the Statement of Assets and Liabilities as an investment. All premiums are marked-to-market daily, and any unrealized appreciation or depreciation are recorded in the Fund's financial statements. As the purchaser of an index option, the Fund has the right to receive a cash payment equal to any depreciation in the value of the index below the strike price of the option (in the case of a put) or equal to any appreciation in the value of the index over the strike price of the option (in the case of a call) as of the valuation date of the option. Premiums paid for purchased calls and put options which have expired are treated as realized losses on investments in the Statement of Operations. Upon the exercise or closing of a purchased put option, the premium is offset against the proceeds on the sale of the underlying security or financial instrument in order to determine the realized gain or loss on investments. Upon the exercise or closing of a purchased call option, the premium is added to the cost of the security or financial instrument. The risk associated with purchasing options is limited to the premium originally paid. The average value of purchased options contracts open during the six months ended February 29, 2016 was $400,307. Purchased option contracts outstanding at period end are listed within the Fund's schedule of investments. Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 43 O. Credit Default Swaps A credit default swap is a contract between a buyer of protection and a seller of protection against a pre-defined credit event. The Fund may sell or buy credit default swap contracts to seek to increase the Fund's income, or to attempt to hedge the risk of default on portfolio securities. A credit default swap index is used to hedge risk or take a position on a basket of credit entities or indices. As a seller of protection, the Fund would be required to pay the notional (or other agreed-upon) value of the referenced debt obligation to the counterparty in the event of a default by a U.S. or foreign corporate issuer of a debt obligation, which would likely result in a loss to the Fund. In return, the Fund would receive from the counterparty a periodic stream of payments during the term of the contract provided that no event of default occurred. The maximum exposure of loss to the seller would be the notional value of the credit default swaps outstanding. If no default occurs, the Fund would keep the stream of payments and would have no payment obligation. The Fund may also buy credit default swap contracts in order to hedge against the risk of default of debt securities, in which case the Fund would function as the counterparty referenced above. When the Fund enters into a credit default swap contract, the protection buyer makes an upfront or periodic payment to the protection seller in exchange for the right to receive a contingent payment. An upfront payment made by the Fund, as the protection buyer, is recorded as an asset in the Statement of Assets and Liabilities. Periodic payments received or paid by the Fund are recorded as realized gains or losses in the Statement of Operations. Credit default swap contracts are marked-to-market daily using valuations supplied by independent sources and the change in value, if any, is recorded as unrealized appreciation or depreciation in the Statement of Assets and Liabilities. Payments received or made as a result of a credit event or upon termination of the contract are recognized, net of the appropriate amount of the upfront payment, as realized gains or losses in the Statement of Operations. Credit default swap contracts involving the sale of protection may involve greater risks than if the Fund had invested in the referenced debt instrument directly. Credit default swap contracts are subject to general market risk, liquidity risk, counterparty risk and credit risk. If the Fund is a protection buyer and no credit event occurs, it will lose its investment. If the Fund is a protection seller and a credit event occurs, the value of the referenced debt instrument received by the Fund, together with the periodic payments received, may be less than the amount the Fund pays to the protection buyer, resulting in a loss to the Fund. 44 Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 Certain swap contracts that are cleared through a central clearinghouse are referred to as centrally cleared swaps. All payments made or received by the Fund are pursuant to a centrally cleared swap contract with the central clearing party rather than the original counterparty. Upon entering into a centrally cleared swap contract, the Fund is required to make an initial margin deposit, either in cash or in securities. The daily change in value on open centrally cleared contracts is recorded as variation margin on centrally cleared swaps on the Statement of Assets and Liabilities. The amount of cash deposited with a broker as collateral at February 29, 2016 was $151,229 and is recorded within "Restricted Cash" on the Statement of Assets and Liabilities. Open credit default swap contracts at February 29, 2016 are listed in the Schedule of Investments. The average value of credit default swap contracts open during the six months ended February 29, 2016 was $(1,271,639). P. Interest Rate Swap Contracts The Fund may enter into interest rate swaps to attempt to hedge against interest rate fluctuations or to enhance its income. Pursuant to the interest rate swap agreement, the Fund negotiates with a counterparty to exchange a periodic stream of payments based on a benchmark interest rate. One cash flow stream will typically be a floating rate payment based upon the specified floating benchmark interest rate while the other is typically a fixed interest rate. Payment flows are usually netted against each other, with the difference being paid by one party to the other on a monthly basis. Periodic payments received or paid by the Fund are recorded as realized gains or losses in the Statement of Operations. Interest rate swap contracts are marked-to-market daily using valuations supplied by independent sources and the change in value, if any, is recorded as unrealized appreciation or depreciation in the Statement of Assets and Liabilities. Interest rate swap contracts are subject to counterparty risk and movements in interest rates. Open interest rate swap contracts at February 29, 2016 are listed in the Schedule of Investments. The average value of interest swap contracts open during the six months ended February 29, 2016 was $(27,260). Q. Total Return Swap Contracts The Fund may enter into a total return swap to attempt to manage and/or gain exposure to a security or market. Pursuant to a total return swap agreement, the Fund negotiates with a counterparty to exchange a periodic stream of payments. One party makes payments based on the total return of a reference asset (such as a security or a basket of securities or securities index), and in return receives fixed or floating rate interest payments. The total Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 45 return of the reference asset typically includes appreciation or depreciation on the reference asset, plus any interest or dividend payments. To the extent that the total return of the reference asset exceeds or falls short of the offsetting interest rate obligation, the Fund will receive a payment from or make a payment to the counterparty. Total return swap contracts are marked-to-market daily using valuations supplied by independent sources and the change in value, if any, is recorded as unrealized appreciation or depreciation in the Statement of Assets and Liabilities. Payments received or made are recorded as realized gains or losses in the Statement of Operations. Total return swap contracts are subject to counterparty risk and unanticipated movements in value of exchange rates, interest rates, securities or the index. Open total return swap contracts at February 29, 2016 are listed in the Schedule of Investments. The average value of swap contracts open during the six months ended February 29, 2016 was $(274,402). R. Repurchase Agreements Repurchase agreements are arrangements under which the Fund purchases securities from a broker-dealer or a bank, called the counterparty, upon the agreement of the counterparty to repurchase the securities from the Fund at a later date, and at a specific price, which is typically higher than the purchase price paid by the Fund. The securities purchased serve as the Fund's collateral for the obligation of the counterparty to repurchase the securities. The value of the collateral, including accrued interest, is required to be equal to or in excess of the repurchase price. The collateral for all repurchase agreements is held in safekeeping in the customer-only account of the Fund's custodian or a subcustodian of the Fund. The Fund's investment adviser, PIM is responsible for determining that the value of the collateral remains at least equal to the repurchase price. In the event of a default by the counterparty, the Fund is entitled to sell the securities, but the Fund may not be able to sell them for the price at which they were purchased, thus causing a loss to the Fund. Additionally, if the counterparty becomes insolvent, there is some risk that the Fund will not have a right to the securities, or the immediate right to sell the securities. 2. Management Agreement PIM, a wholly owned indirect subsidiary of UniCredit, manages the Fund's portfolio. Management fees are calculated daily at an annual rate of 1.05% of the average daily net assets of the Fund up to $1 billion and 0.95% of the Fund's average daily net assets over $1 billion of the Fund. For the six months ended February 29, 2016, the effective management fee was equivalent to 1.05% of the Fund's average daily net assets. 46 Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 PIM has contractually agreed to limit ordinary operating expenses (ordinary operating expenses means all fund expenses other than extraordinary expenses, such as litigation, taxes, brokerage commissions and acquired fund fees and expenses) to the extent required to reduce Fund expenses to 1.55%, 2.30% and 1.30% of the average daily net assets attributable to Class A, Class C and Class Y shares, respectively. These expense limitations are in effect through January 1, 2017. Fees waived and expenses reimbursed during the six months ended February 29, 2016 are reflected on the Statement of Operations. Fees and expenses of other investment companies in which the Fund may invest are not included in the expense limitations noted above. There can be no assurance that PIM will extend the expense limitation agreement for a class of shares beyond the date referred to above. In addition, under the management and administration agreements, certain other services and costs, including accounting, regulatory reporting and insurance premiums, are paid by the Fund as administrative reimbursements. Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $34,293 in management fees, administrative costs and certain other reimbursements payable to PIM at February 29, 2016. 3. Transfer Agent Prior to November 2, 2015, Pioneer Investment Management Shareholder Services, Inc. (PIMSS), a wholly owned indirect subsidiary of UniCredit, provided substantially all transfer agent and shareowner services to the Fund at negotiated rates. Effective November 2, 2015, Boston Financial Data Services serves as the transfer agent to the Fund at negotiated rates. In addition, the Fund reimbursed the transfer agent for out-of-pocket expenses incurred by the transfer agent related to shareholder communications activities such as proxy and statement mailings, outgoing phone calls and omnibus relationship contracts. For the six months ended February 29, 2016, such out-of-pocket expenses by class of shares were as follows: -------------------------------------------------------------------------------- Shareholder Communications: -------------------------------------------------------------------------------- Class A $ 3,127 Class C 355 Class Y 2,776 -------------------------------------------------------------------------------- Total $ 6,258 ================================================================================ Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 47 Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $2,451 in transfer agent fees and out-of-pocket reimbursements payable to the transfer agent at February 29, 2016. 4. Distribution Plan The Fund has adopted a Distribution Plan pursuant to Rule 12b-1 of the Investment Company Act of 1940 with respect to its Class A and Class C shares. Pursuant to the Plan, the Fund pays PFD 0.25% of the average daily net assets attributable to Class A shares as compensation for personal services and/or account maintenance services or distribution services with regard to Class A shares. Pursuant to the Plan, the Fund also pays PFD 1.00% of the average daily net assets attributable to Class C shares. The fee for Class C shares consists of a 0.25% service fee and a 0.75% distribution fee paid as compensation for personal services and/or account maintenance services or distribution services with regard to Class C shares. Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $1,291 in distribution fees payable to PFD at February 29, 2016. In addition, redemptions of each class of shares (except Class Y shares) may be subject to a contingent deferred sales charge (CDSC). A CDSC of 1.00% may be imposed on redemptions of certain net asset value purchases of Class A shares within 12 months of purchase. Redemptions of Class C shares within 12 months of purchase are subject to a CDSC of 1.00%, based on the lower of cost or market value of shares being redeemed. Shares purchased as part of an exchange remain subject to any CDSC that applied to the original purchase of those shares. There is no CDSC for Class Y shares. Proceeds from the CDSC are paid to PFD. For the six months ended February 29, 2016, there were no CDSCs paid to PFD. 5. Forward Foreign Currency Contracts During the six months ended February 29, 2016, the Fund had entered into various forward foreign currency contracts that obligate the Fund to deliver or take delivery of currencies at specified future maturity dates. Alternatively, prior to the settlement date of a forward foreign currency contract, the Fund may close out such contract by entering into an offsetting contract. The average value of forward foreign currency contracts open during the six months ended February 29, 2016 was $(3,068,486). 48 Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 -------------------------------------------------------------------------------------------------- Currency Currency In Exchange Settlement Unrealized Sold Deliver Purchased for Counterparty Date Appreciation -------------------------------------------------------------------------------------------------- EUR (Euro) (121,877) USD 137,212 Citibank NA 3/16/16 $ 4,432 EUR (Euro) (298,853) USD 328,522 JPMorgan 3/16/16 2,935 Chase Bank NA KRW (South (702,205,138) USD 580,527 JPMorgan 4/21/16 14,664 Korean Won) Chase Bank NA NZD (New (296,618) AUD 275,029 JPMorgan 5/23/16 1,136 Zealand (Australian Chase Bank NA Dollar) Dollar) JPY (Japanese (36,079,011) USD 322,206 JPMorgan 5/25/16 1,511 Yen) Chase Bank NA AUD (Australian (267,039) USD 192,340 JPMorgan 5/25/16 2,459 Dollar) Chase Bank NA ZAR (South (1,828,142) USD 118,110 JPMorgan 5/25/16 4,762 African Rand) Chase Bank NA HUF (83,389,248) USD 298,751 JPMorgan 5/25/16 5,976 (Hungarian Chase Bank NA Forint) NZD (New (595,018) USD 395,144 JPMorgan 5/25/16 5,130 Zealand Chase Bank NA Dollar) EUR (Euro) (264,485) USD 292,408 JPMorgan 5/25/16 3,604 Chase Bank NA -------------------------------------------------------------------------------------------------- Total $ 46,609 ================================================================================================== -------------------------------------------------------------------------------------------------- Currency Currency In Exchange Settlement Unrealized Sold Deliver Purchased for Counterparty Date Depreciation -------------------------------------------------------------------------------------------------- USD (300,112) EUR (Euro) 265,820 Goldman Sachs 3/16/16 $(10,513) International USD (214,336) EUR (Euro) 195,016 Citibank NA 3/16/16 (1,875) USD (737,112) EUR (Euro) 670,645 JPMorgan 3/16/16 (6,476) Chase Bank NA USD (314,333) INR (Indian 21,620,000 Goldman Sachs 4/21/16 (614) Rupee) International SGD (407,563) USD 282,929 JPMorgan 4/25/16 (6,470) (Singapore Chase Bank NA Dollar) CAD (623,607) MXN 8,140,254 JPMorgan 4/25/16 (13,946) (Canadian (Mexican Chase Bank NA Dollar) Peso) SEK (Swedish (4,134,278) USD 483,309 JPMorgan 4/25/16 (866) Krona) Chase Bank NA CZK (Czech (11,965,251) USD 479,065 Citibank NA 4/25/16 (2,887) Koruna) TWD (New (19,615,923) USD 588,978 JPMorgan 5/18/16 (494) Taiwan Dollar) Chase Bank NA CAD (Canadian (255,633) USD 185,110 JPMorgan 5/25/16 (4,027) Dollar) Citibank NA -------------------------------------------------------------------------------------------------- Total $(48,168) ================================================================================================== Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 49 6. Assets and Liabilities Offsetting The Fund has entered into an International Swaps and Derivatives Association, Inc. Master Agreement ("ISDA Master Agreement") or similar agreement with substantially all its derivative counterparties. An ISDA Master Agreement is a bilateral agreement between the Fund and a counterparty that governs the trading of certain OTC derivatives and typically contains, among other things, close-out and set-off provisions which apply upon the occurrence of event of a default and/or termination event as defined under the relevant ISDA Master Agreement. The ISDA Master Agreement may also give a party the right to terminate all transactions traded under such agreement if, among other things, there is deterioration in the credit quality of the other party. Upon an event of default or a termination of the ISDA Master Agreement, the non-defaulting party has the right to close out all transactions under such agreement and to net amounts owed under each transaction to determine one net amount payable by one party to the other. The right to close out and net payments across all transactions under the ISDA Master Agreement could result in a reduction of the Fund's credit risk to its counterparty equal to any amounts payable by the Fund under the applicable transactions, if any. However, the Fund's right to setoff may be restricted or prohibited by the bankruptcy or insolvency laws of the particular jurisdiction to which a specific ISDA counterparty is subject. The collateral requirements for derivatives transactions under an ISDA Master Agreement are governed by a credit support annex to the ISDA Master Agreement. Collateral requirements are generally determined at the close of business each day and are typically based on changes in market values for each transaction under an ISDA Master Agreement and netted into one amount for such agreement. Generally, the amount of collateral due from or to a counterparty is subject to threshold (a "minimum transfer amount") before a transfer is required, which may vary by counterparty. Collateral pledged for the benefit of the Fund and/or counterparty is held in segregated accounts by the Fund's custodian and cannot be sold, re-pledged, assigned or otherwise used while pledged. Cash that has been segregated to cover the Fund's collateral obligations, if any, will be reported separately in the Statement of Assets and Liabilities as "Restricted cash." Securities pledged by the Fund as collateral, if any, are identified as such in the Schedule of Investments. 50 Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 Financial instruments subject to an enforceable master netting agreement such as an ISDA Master Agreement have been offset on the Statement of Assets and Liabilities. The following charts show gross assets and liabilities of the Fund as of February 29, 2016. --------------------------------------------------------------------------------------------------- Derivative Assets Subject to Derivatives Non-Cash Cash Net Amount Master Netting Available Collateral Collateral of Derivative Counterparty Agreement for Offset Received (a) Received (a) Assets (b) --------------------------------------------------------------------------------------------------- Barclays Bank Plc $140,569 $ (20,329) $ -- $ -- $120,240 Citibank NA 4,432 (4,432) -- -- -- Goldman Sachs International 78,426 (78,426) -- -- -- JPMorgan Chase Bank NA 65,256 (65,256) -- -- -- Morgan Stanley Capital Services LLC 35,145 (35,145) -- -- -- --------------------------------------------------------------------------------------------------- Total $323,828 $ (203,588) $ -- $ -- $120,240 =================================================================================================== ---------------------------------------------------------------------------------------------------- Derivative Liabilities Subject to Derivatives Non-Cash Cash Net Amount Master Netting Available Collateral Collateral of Derivative Counterparty Agreement for Offset Pledged (a) Pledged (a) Liabilities (c) ---------------------------------------------------------------------------------------------------- Barclays Bank Plc $ (20,329) $ 20,329 $ -- $ -- $ -- Citibank NA (8,789) 4,432 -- -- (4,357) Goldman Sachs International (630,619) 78,426 552,193 -- -- JPMorgan Chase Bank NA (668,091) 65,256 602,835 -- -- Morgan Stanley Capital Services LLC (53,408) 35,145 -- -- (18,263) ---------------------------------------------------------------------------------------------------- Total $ (1,381,236) $203,588 $1,155,028 $ -- $ (22,620) ==================================================================================================== (a) The amount presented here may be less than the total amount of collateral received/pledged as the net amount of derivative assets and liabilities cannot be less than $0. (b) Represents the net amount due from the counterparty in the event of default. (c) Represents the net amount payable to the counterparty in the event of default. 7. Additional Disclosures about Derivative Instruments and Hedging Activities: The Fund's use of derivatives subjects it to the following risks: Interest rate risk relates to the fluctuations in the value of interest-bearing securities due to changes in the prevailing levels of market interest rates. Credit risk relates to the ability of the issuer of a financial instrument to make further principal or interest payments on an obligation or commitment that it has to the Fund. Foreign exchange rate risk relates to fluctuations in the value of an asset or liability due to changes in currency exchange rates. Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 51 Equity risk relates to the fluctuations in the value of financial instruments as a result of changes in market prices (other than those arising from interest rate risk or foreign exchange risk), whether caused by factors specific to an individual investment, its issuer, or all factors affecting all instruments traded in a market or market segment. Commodity risk relates to the risk that the value of a commodity or commodity index will fluctuate based on increases or decreases in the commodities market and factors specific to a particular industry or commodity. The fair value of open derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) by risk exposure at February 29, 2016 was as follows: ----------------------------------------------------------------------------------------- Statement of Foreign Assets and Interest Credit Exchange Equity Commodity Liabilities Rate Risk Risk Rate Risk Risk Risk ----------------------------------------------------------------------------------------- Assets Unrealized appreciation of forward foreign currency contracts $ -- $ -- $ 46,609 $ -- $ -- Unrealized appreciation of futures contracts 5,469 -- -- 312,570 -- ----------------------------------------------------------------------------------------- Total Value $ 5,469 $ -- $ 46,609 $ 312,570 $ -- ========================================================================================= Liabilities Unrealized depreciation of forward foreign currency contracts $ -- $ -- $ (48,168) $ -- $ -- Net unrealized depreciation on swap contracts (628,127) (54,602) -- -- -- Written options -- -- -- -- -- ----------------------------------------------------------------------------------------- Total Value $ (628,127) $ (54,602) $ (48,168) $ -- $ -- ========================================================================================= 52 Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 The effect of derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) on the Statement of Operations by risk exposure at February 29, 2016 was as follows: ----------------------------------------------------------------------------------------- Foreign Statement of Interest Credit Exchange Equity Commodity Operations Rate Risk Risk Rate Risk Risk Risk ----------------------------------------------------------------------------------------- Net realized gain (loss) on Futures contracts $ (347,611) $ -- $ -- $ -- $ -- Written options -- 77,557 -- 364,205 -- Swap contracts -- (1,905,228) -- -- -- Forward foreign currency contracts* -- -- (73,593) -- -- ----------------------------------------------------------------------------------------- Total Value $ (347,611) $ (1,827,671) $ (73,593) $ 364,205 $ -- ========================================================================================= Change in net unrealized appreciation (depreciation) on Futures contracts $ 6,016 $ -- $ -- $ -- $ -- Written options -- -- -- 495,804 -- Swap contracts (617,355) 201,939 -- -- -- Forward foreign currency contracts* -- -- (9,822) -- -- ----------------------------------------------------------------------------------------- Total Value $ (611,339) $ -- $ (9,822) $ 495,804 $ -- ========================================================================================= * Included in the amount shown on the Statement of Operations as forward foreign currency contracts and other assets and liabilities denominated in foreign currencies. Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 53 ADDITIONAL INFORMATION (unaudited) The Board of Trustees of the Fund has approved the elimination of the Fund's current policy normally to invest at least 40% of the net assets in securities of assets located outside of the United States. In connection with the elimination of this policy, the Fund was renamed Pioneer Long/Short Bond Fund. These changes went into effect on June 1, 2015. Pioneer Investment Management, Inc. (the "Adviser"), each fund's investment adviser, is currently an indirect, wholly owned subsidiary of UniCredit S.p.A. ("UniCredit"). On November 11, 2015, UniCredit announced that it signed a binding master agreement with Banco Santander and affiliates of Warburg Pincus and General Atlantic (the "Private Equity Firms") with respect to Pioneer Investments ("Pioneer") and Santander Asset Management ("SAM") (the "Transaction"). The Transaction, as previously announced by UniCredit, will establish a holding company, with the name Pioneer Investments, to be owned by UniCredit (50%) and the Private Equity Firms (50% between them). The holding company will control Pioneer's U.S. operations, including PIM. The holding company also will own 66.7% of Pioneer's and SAM's combined operations outside the U.S., while Banco Santander will own directly the remaining 33.3% stake. The closing of the Transaction is expected to happen in 2016, subject to certain regulatory and other approvals. Under the Investment Company Act of 1940, completion of the Transaction will cause each fund's current investment advisory agreement with PIM to terminate. Accordingly, each fund's Board of Trustees will be asked to approve a new investment advisory agreement. If approved by the Board, each fund's new investment advisory agreement will be submitted to the shareholders of the fund for their approval. 54 Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 Approval of Investment Advisory Agreement Pioneer Investment Management, Inc. (PIM) serves as the investment adviser to Pioneer Long/Short Bond Fund (the Fund) pursuant to an investment advisory agreement between PIM and the Fund. In order for PIM to remain the investment adviser of the Fund, the Trustees of the Fund must determine annually whether to renew the investment advisory agreement for the Fund. The contract review process began in January 2015 as the Trustees of the Fund agreed on, among other things, an overall approach and timeline for the process. Contract review materials were provided to the Trustees in March 2015 and July 2015. Supplemental contract review materials were provided to the Trustees in September 2015. In addition, the Trustees reviewed and discussed the Fund's performance at regularly scheduled meetings throughout the year, and took into account other information related to the Fund provided to the Trustees at regularly scheduled meetings, in connection with the review of the Fund's investment advisory agreement. In March 2015, the Trustees, among other things, discussed the memorandum provided by Fund counsel that summarized the legal standards and other considerations that are relevant to the Trustees in their deliberations regarding the renewal of the investment advisory agreement, and reviewed and discussed the qualifications of the investment management teams, as well as the level of investment by the Fund's portfolio managers in the Fund. In July 2015, the Trustees, among other things, reviewed the Fund's management fee and total expense ratios, the financial statements of PIM and its parent companies, the profitability analyses provided by PIM, and possible economies of scale. The Trustees also reviewed the profitability of the institutional business of PIM and PIM's affiliate, Pioneer Institutional Asset Management, Inc. (together with PIM, "Pioneer"), as compared to that of PIM's fund management business, and considered the differences between the fees and expenses of the Fund and the fees and expenses of Pioneer's institutional accounts, as well as the different services provided by PIM to the Fund and by Pioneer to the institutional accounts. The Trustees further considered contract review materials in September 2015. At a meeting held on September 15, 2015, based on their evaluation of the information provided by PIM and third parties, the Trustees of the Fund, including the Independent Trustees voting separately, unanimously approved the renewal of the investment advisory agreement for another year. In approving the renewal of the investment advisory agreement, the Trustees considered various factors that they determined were relevant, including the factors described below. The Trustees did not identify any single factor as the controlling factor in determining to approve the renewal of the agreement. Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 55 Nature, Extent and Quality of Services The Trustees considered the nature, extent and quality of the services that had been provided by PIM to the Fund, taking into account the investment objective and strategy of the Fund. The Trustees also reviewed PIM's investment approach for the Fund and its research process. The Trustees considered the resources of PIM and the personnel of PIM who provide investment management services to the Fund. They also reviewed the amount of non-Fund assets managed by the portfolio managers of the Fund. The Trustees considered the non-investment resources and personnel of PIM involved in PIM's services to the Fund, including PIM's compliance and legal resources and personnel. The Trustees noted the substantial attention and high priority given by PIM's senior management to the Pioneer fund complex. The Trustees considered that PIM supervises and monitors the performance of the Fund's service providers and provides the Fund with personnel (including Fund officers) and other resources that are necessary for the Fund's business management and operations. The Trustees also considered that, as administrator, PIM is responsible for the administration of the Fund's business and other affairs. The Trustees considered the fees paid to PIM for the provision of administration services. Based on these considerations, the Trustees concluded that the nature, extent and quality of services that had been provided by PIM to the Fund were satisfactory and consistent with the terms of the investment advisory agreement. Performance of the Fund In considering the Fund's performance, the Trustees regularly review and discuss throughout the year data prepared by PIM and information comparing the Fund's performance with the performance of its peer group of funds as classified by each of Morningstar, Inc. (Morningstar) and Lipper, and with the performance of the Fund's benchmark index. They also discuss the Fund's performance with PIM on a regular basis. The Trustees' regular reviews and discussions were factored into the Trustees' deliberations concerning the renewal of the advisory agreement. Management Fee and Expenses The Trustees considered information showing the fees and expenses of the Fund in comparison to the management fees and expense ratios of its peer group of funds as classified by Morningstar and also to the expense ratios of a peer group of funds selected on the basis of criteria determined by the Independent Trustees for this purpose using data provided by Strategic Insight Mutual Fund Research and Consulting, LLC (Strategic Insight), an independent third party. In all quintile rankings referred to below, first quintile is most favorable to the Fund's shareowners. 56 Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 The Trustees considered that the Fund's management fee for the most recent fiscal year was in the fifth quintile relative to the management fees paid by other funds in its Morningstar peer group for the comparable period. The Trustees also considered the breakpoint in the management fee schedule and the reduced fee rate above a certain asset level. The Trustees noted the investment management expertise and resources required to implement the Fund's complex investment strategy. The Trustees considered that the expense ratio of the Fund's Class A shares for the most recent fiscal year was in the fifth quintile relative to its Morningstar peer group and in the fourth quintile relative to its Strategic Insight peer group, in each case for the comparable period. The Trustees noted that PIM was waiving fees and/or reimbursing expenses in order to limit the ordinary operating expenses of the Fund. The Trustees noted the Fund's relatively small asset size compared to most of the other funds in its peer groups, and that the Fund has not been able to take advantage of the economies of scale afforded by greater asset size. The Trustees considered the impact of transfer agency, sub-transfer agency, and other non-management fee expenses on the expense ratios of the Fund. The Trustees noted that they separately review the Fund's transfer agency, sub-transfer agency and intermediary arrangements. The Trustees reviewed management fees charged by Pioneer to institutional and other clients, including publicly offered European funds sponsored by affiliates of Pioneer, unaffiliated U.S. registered investment companies (in a sub-advisory capacity), and unaffiliated foreign and domestic separate accounts. The Trustees also considered PIM's costs in providing services to the Fund and Pioneer's costs in providing services to the other clients and considered the differences in management fees and profit margins for Fund and non-Fund services. In evaluating the fees associated with Pioneer's client accounts, the Trustees took into account the respective demands, resources and complexity associated with the Fund and client accounts. The Trustees noted that, in some instances, the fee rates for those clients were lower than the management fee for the Fund and considered that, under the investment advisory agreement with the Fund, PIM performs additional services for the Fund that it does not provide to those other clients or services that are broader in scope, including oversight of the Fund's other service providers and activities related to compliance and the extensive regulatory and tax regimes to which the Fund is subject. The Trustees also considered the different entrepreneurial risks associated with PIM's management of the Fund and Pioneer's management of the other client accounts. The Trustees concluded that the management fee payable by the Fund to PIM was reasonable in relation to the nature and quality of the services provided by PIM to the Fund. Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 57 Profitability The Trustees considered information provided by PIM regarding the profitability of PIM with respect to the advisory services provided by PIM to the Fund, including the methodology used by PIM in allocating certain of its costs to the management of the Fund. The Trustees also considered PIM's profit margin in connection with the overall operation of the Fund. They further reviewed the financial results realized by PIM and its affiliates from non-fund businesses. The Trustees considered PIM's profit margins with respect to the Fund in comparison to the limited industry data available and noted that the profitability of any adviser was affected by numerous factors, including its organizational structure and method for allocating expenses. The Trustees concluded that PIM's profitability with respect to the management of the Fund was not unreasonable. Economies of Scale The Trustees considered PIM's views relating to economies of scale in connection with the Pioneer Funds as fund assets grow and the extent to which any such economies of scale are shared with funds and fund shareholders. The Trustees noted the breakpoint in the management fee schedule. The Trustees recognize that economies of scale are difficult to identify and quantify, and that, among other factors that may be relevant, are the following: fee levels, expense subsidization, investment by PIM in research and analytical capabilities and PIM's commitment and resource allocation to the Fund. The Trustees noted that profitability also may be an indicator of the availability of any economies of scale, although profitability may vary for other reasons including reductions in expenses. The Trustees concluded that economies of scale, if any, were being appropriately shared with the Funds. Other Benefits The Trustees considered the other benefits to PIM from its relationship with the Fund. The Trustees considered the character and amount of fees paid by the Fund, other than under the investment advisory agreement, for services provided by PIM and its affiliates. The Trustees further considered the revenues and profitability of PIM's businesses other than the fund business. Pioneer is the principal U.S. asset management business of Pioneer Global Asset Management, the worldwide asset management business of UniCredit Group, which manages over $150 billion in assets (including the Funds). Pioneer and the Funds receive reciprocal intangible benefits from the relationship, including mutual brand recognition and, for the Funds, direct and indirect access to the resources of a large global asset manager. The Trustees concluded that any such benefits received by Pioneer as a result of its 58 Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 relationship with the Funds were reasonable and their consideration of the advisory agreement between the Fund and PIM and the fees thereunder were unaffected by Pioneer's possible receipt of any such intangible benefits. Conclusion After consideration of the factors described above as well as other factors, the Trustees, including all of the Independent Trustees, concluded that the investment advisory agreement between PIM and the Fund, including the fees payable thereunder, was fair and reasonable and voted to approve the proposed renewal of the investment advisory agreement for the Fund. Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 59 Trustees, Officers and Service Providers Trustees Advisory Trustee Thomas J. Perna, Chairman Lorraine H. Monchak* David R. Bock Benjamin M. Friedman Officers Margaret B.W. Graham Lisa M. Jones, President and Chief Marguerite A. Piret Executive Officer Fred J. Ricciardi Mark E. Bradley, Treasurer and Kenneth J. Taubes Chief Financial Officer Christopher J. Kelley, Secretary and Chief Legal Officer Investment Adviser and Administrator Pioneer Investment Management, Inc. Custodian and Sub-Administrator Brown Brothers Harriman & Co. Principal Underwriter Pioneer Funds Distributor, Inc. Legal Counsel Morgan, Lewis & Bockius LLP Shareowner Services and Transfer Agent Boston Financial Data Services, Inc. Proxy Voting Policies and Procedures of the Fund are available without charge, upon request, by calling our toll free number (1-800-225-6292). Information regarding how the Fund voted proxies relating to portfolio securities during the most recent 12-month period ended June 30 is publicly available to shareowners at us.pioneerinvestments.com. This information is also available on the Securities and Exchange Commission's web site at www.sec.gov. * Ms. Monchak is a non-voting Advisory Trustee. 60 Pioneer Long/Short Bond Fund | Semiannual Report | 2/29/16 How to Contact Pioneer We are pleased to offer a variety of convenient ways for you to contact us for assistance or information. Call us for: -------------------------------------------------------------------------------- Account Information, including existing accounts, new accounts, prospectuses, applications and service forms 1-800-225-6292 FactFone(SM) for automated fund yields, prices, account information and transactions 1-800-225-4321 Retirement plans information 1-800-622-0176 Write to us: -------------------------------------------------------------------------------- Pioneer Funds P.O. Box 55014 Boston, Massachusetts 02205-5014 Our toll-free fax 1-800-225-4240 Our internet e-mail address ask.pioneer@pioneerinvestments.com (for general questions about Pioneer only) Visit our web site: us.pioneerinvestments.com This report must be preceded or accompanied by a prospectus. The Fund files a complete schedule of investments with the Securities and Exchange Commission for the first and third quarters for each fiscal year on Form N-Q. Shareholders may view the filed Form N-Q by visiting the Commission's web site at http://www.sec.gov. The filed form may also be viewed and copied at the Commission's Public Reference Room in Washington, DC. Information regarding the operations of the Public Reference Room may be obtained by calling 1-800-SEC-0330. [LOGO] PIONEER Investments(R) Pioneer Investment Management, Inc. 60 State Street Boston, MA 02109 us.pioneerinvestments.com Securities offered through Pioneer Funds Distributor, Inc. 60 State Street, Boston, MA 02109 Underwriter of Pioneer Mutual Funds, Member SIPC (C) 2016 Pioneer Investments 27667-02-0416 Pioneer Long/Short Opportunistic Credit Fund -------------------------------------------------------------------------------- Semiannual Report | February 29, 2016 -------------------------------------------------------------------------------- Ticker Symbols: Class A LRCAX Class C LRCCX Class Y LRCYX [LOGO] PIONEER Investments(R) visit us: us.pioneerinvestments.com Table of Contents President's Letter 2 Portfolio Management Discussion 4 Portfolio Summary 10 Prices and Distributions 11 Performance Update 12 Comparing Ongoing Fund Expenses 15 Schedule of Investments 17 Financial Statements 27 Notes to Financial Statements 34 Approval of Investment Advisory Agreement 55 Trustees, Officers and Service Providers 60 Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 1 President's Letter Dear Shareowner, Over the past several years, many investors experienced positive returns across most major asset classes. However, 2015 was a tale of two markets, with favorable market conditions in the first half of the year, followed by an abrupt slowdown and increased volatility beginning in August. The global markets were challenged by significant economic cross-currents in different geographic regions and industrial sectors. While the U.S. economy gradually improved, growth slowed in China. Emerging markets struggled following a decline in commodity prices, especially oil. While lower energy prices are good for the consumer, there were ripple effects throughout the global economy. Against this backdrop, the Standard & Poor's 500 Index rose by just 1.4% in 2015, international equity markets were essentially flat, and emerging market equities fell sharply. Across U.S. fixed-income sectors, U.S. government and investment-grade corporate bonds were fairly flat for the year, while high-yield bonds, as measured by the Bank of America Merrill Lynch Master II High Yield Index, posted a -4.9% total return. Entering 2016, we see the U.S. economy growing modestly, against an overall global economic backdrop that remains fragile and points towards structurally lower growth. As always in a presidential election year, political rhetoric has the potential to impact U.S. sectors such as health care in 2016. Economies around the world in both developed and emerging markets are experiencing deep structural change. Geopolitical instability on many fronts, the rising risk of policy mistakes, and market liquidity issues all increase the possibility of sharp swings in asset values. In this environment, financial markets remain vulnerable to unusual levels of volatility. While divergences among regions and industries is an important theme, we are generally optimistic about the outlook for the U.S. economy, which we expect will see continued, positive growth led by a strengthened consumer. Throughout Pioneer's history, we have believed in the importance of active management. In periods of market volatility, we believe that the value of active management is even more compelling. Our experienced and tenured investment teams focus on identifying value across global markets using proprietary research, careful risk management, and a long-term perspective. Our ongoing goal is to produce compelling returns consistent with the stated objectives of our investment products, and with our shareowners' expectations. We believe our shareowners can benefit from the experience and tenure of our investment teams as well as the insights generated from our extensive research process. 2 Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 As always, and particularly during times of market uncertainty, we encourage you to work with your financial advisor to develop an overall investment plan that addresses both your short- and long-term goals, and to implement such a plan in a disciplined manner. We greatly appreciate the trust you have placed in us and look forward to continuing to serve you in the future. Sincerely, /s/ Lisa M. Jones Lisa M. Jones President and CEO Pioneer Investment Management USA Inc. February 29, 2016 Any information in this shareowner report regarding market or economic trends or the factors influencing the Fund's historical or future performance are statements of opinion as of the date of this report. These statements should not be relied upon for any other purposes. Past performance is no guarantee of future results, and there is no guarantee that market forecasts discussed will be realized. Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 3 Portfolio Management Discussion | 2/29/16 In the following interview, portfolio managers Thomas Swaney and Benjamin Gord discuss the factors that influenced Pioneer Long/Short Opportunistic Credit Fund's performance during the six-month period ended February 29, 2016, as well as their investment approach in managing the Fund. Mr. Swaney, Head of Alternative Fixed Income, U.S., a senior vice president, and a portfolio manager at Pioneer (lead portfolio manager of the Fund since 2013), and Mr. Gord, a vice president and a portfolio manager at Pioneer, are responsible for the day-to-day management of the Fund. Q How did the Fund perform during the six-month period ended February 29, 2016? A Pioneer Long/Short Opportunistic Credit Fund's Class A shares returned -7.37% at net asset value during the six-month period ended February 29, 2016, while the Fund's benchmark, the Bank of America Merrill Lynch (BofA ML) 3-Month U.S. Treasury-Bill Index, returned 0.06%. During the same period, the average return of the 306 mutual funds in Lipper's Alternative Credit Focus Funds category was -3.45%, and the average return of the 537 mutual funds in Morningstar's Non-Traditional Bond Funds category was -2.94%. Q Can you provide an overview of the Fund's approach? A The big picture is that we seek to have the Fund produce an average annual return that is greater than the return on three-month Treasury bills on an annualized basis, with volatility lower than one would experience in the broad equity market. In pursuing this goal, we seek to have the Fund provide positive returns while trying to minimize the extent of any negative returns, regardless of market conditions. Obviously, if we are going to be successful in achieving our objective, the Fund's returns cannot be overly dependent on the direction of one or more financial asset categories. In seeking positive returns regardless of market conditions, we utilize two distinct strategies. One strategy is "directional," in that we need to be correct about whether a particular asset price is poised to rise or fall. However, we seek to have the Fund's performance benefit from both positive and negative returns. This means that at times we invest the 4 Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 portfolio in some asset categories within the broad bond market by taking long positions, while taking an unfavorable view of other asset classes by taking short positions. The other part of the portfolio utilizes uncorrelated, relative-value-based trading strategies, in which we do not have to take a stance on whether an individual market is going to rise or fall overall. Instead, we need to identify either a segment or security within a market that we believe will outperform versus another market segment or security. We execute these portfolio investment strategies across several different global financial markets and many different asset classes. We will seek to "pair" positions, meaning that the Fund will have a long position in one segment/security of a particular market, and a short position in another segment/security. We believe this strategy can allow the Fund to benefit from favorable relative performance, regardless of the overall direction of that market. Most importantly, we closely track the risks we have assumed in both portions of the portfolio and operate within an overall "risk budget," which is based on our goal of largely avoiding negative returns over a 12-month period (full fiscal year). Q Can you discuss the investment strategies that had the biggest effects on the Fund's benchmark-relative performance during the six-month period ended February 29, 2016? A The Fund underperformed the BofA ML Index during the period, with the vast majority of the negative returns attributable to positions within the relative value, or market neutral, portion of the portfolio. In that vein, the portfolio's long/short relative-value-based strategy, under which we pair a long or short position in an individual security with an opposing position, detracted from relative results over the entire six-month timeframe. (Long/Short positioning involves taking long, or bought positions in fixed-income/equity securities in anticipation that they will increase in value, and taking short, or sold positions in fixed- income/equities in anticipation that they will decrease in value.) An example of a long/short trade that did not turn out well for the Fund was a pairing of a short position in electronics retailer Best Buy with a long position in the broader market (in five-year securities). Conversely, a long/short trade that performed well over the six-month period was one where we tried to take advantage of a technically driven price decline, going long Frontier Communications, a domestic telecommunications company. Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 5 One thematic trade that detracted from the Fund's results involved taking long portfolio exposures to energy-related issuers of higher credit quality, while shorting non-energy names. We executed the trade because we expected the price of oil to stabilize following the sharp declines already experienced since roughly mid-2014. However, the price of oil continued to slide over the six-month period, and energy credits lagged as a result, causing the Fund's position to decline in value. Another relative value-based strategy that detracted from the Fund's performance during the period involved holding a long portfolio of short- maturity corporate credits (generally one year or less) priced at levels suggesting the market was overestimating the risk of default, while attempting to hedge out the impact of the broader market's performance. While most of the shorter-term securities had positive returns over the six-month period, a handful of long positions underperformed, resulting in losses for this particular strategy. Within this strategy, one trade that detracted from relative performance was a long position in Abengoa, a Spanish infrastructure company. An example of a trade that generated positive returns within the same strategy was going long on Glencore, a European metals company. We believed that Glencore's bond prices had overshot to the downside in the wake of commodity-price weakness, given the company's overall financial flexibility. On the directional side of the portfolio, the most significant detractor from the Fund's results was a position designed to benefit from any rebound in the performance of European high-yield corporate bonds. We anticipated that high-yield bond valuations would benefit from stepped-up European Central Bank (ECB) efforts to stimulate growth, following a poor response to the ECB's December announcement regarding planned asset purchases. However, credit sentiment and high-yield valuations were undermined in early 2016 by an escalation of concerns about the banking sector in Europe, as Deutsche Bank reported losses. Finally, the Fund's thematic long/short value currency trades contributed to performance during the period. In particular, being short the Swedish krona versus the U.S. dollar, long the Australian dollar versus the New Zealand dollar, and long the Mexican peso versus the Canadian dollar. 6 Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 Q Please discuss the role of derivatives in implementing the Fund's investment approach during the six-month period ended February 29, 2016. A We implement virtually all of the portfolio's strategies via derivatives, and so the Fund's performance will always be affected by derivatives trading. For instance, when we want to short U.S. Treasuries, we will do so mainly by selling Treasury futures or sometimes by buying "put" options. (A "put" option is a contractual agreement that gives the contract owner the right, but not the obligation, to sell a security at a pre-determined, fixed price for a certain period of time, regardless of the current market price of that security.) Similarly, in the currency sleeve of the Fund, we use forwards and options to gain the desired exposures. With respect to credit markets, where there are no liquid futures contracts, we may use credit default swaps to manage the portfolio's exposures. In other situations, we utilize instruments such as interest-rate or inflation swaps to implement our strategies. Q What is your assessment of the current macroeconomic climate and the investment opportunities it may present? A At present, we are cautious about taking risks with respect to market direction, due to a number of significant uncertainties affecting the global economy. A potential slowdown in China's economy, paired with the possibility of the Chinese government's providing stimulus to rattle markets; the effectiveness of the ECB's and Bank of Japan's stimulus policies; volatile oil prices and their effect on the global economy; the uncertain pace of interest-rate hikes by the U.S. Federal Reserve; and the potential impact of a strong U.S. dollar on both domestic equity valuations and overseas debtors are among the issues dominating current market sentiment. Against this backdrop, we foresee only relatively slow global economic growth, and believe the environment of heightened market volatility will persist as investors react to the flow of news and economic data. As a result, we expect to look principally to relative-value trades as a potential source of return for the Fund. We continue to see relatively few directional investment opportunities in the fixed-income markets. Viewed in isolation, credit spreads have widened to reasonably attractive levels. However, the elevated price volatility has diminished the attractiveness of the spreads on a risk-adjusted basis. (Credit spreads are commonly defined as the differences in yield between Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 7 Treasuries and other types of fixed-income securities with similar maturities.) That said, we plan to remain active in evaluating any directional opportunities created by market swings. Going forward, we will continue to seek to identify investment opportunities that emerge as market reactions overshoot developments on various macroeconomic fronts. Please refer to the Schedule of Investments on pages 17-26 for a full listing of Fund securities. All investments are subject to risk, including the possible loss of principal. In the past several years, financial markets have experienced increased volatility, depressed valuations, decreased liquidity, and heightened uncertainty. These conditions may continue, recur, worsen, or spread. The Fund may invest in derivative securities, such as options, futures, inverse floating-rate obligations, and swaps, among others, which can be illiquid, may disproportionately increase losses, and have a potentially large impact on the performance of the Fund. The Fund may take short positions, which involves leverage of its assets and presents additional risks. The Fund may invest in credit default swaps, which may in some cases be illiquid, and they increase credit risk since the Fund has exposure to both the issuer of the referenced obligation and the counterparty to the credit default swap. The Fund employs leverage, which increases the volatility of investment returns and subjects the Fund to magnified losses. Investments in fixed-income securities involve interest rate, credit, inflation, and reinvestment risks. When interest rates rise, the prices of fixed-income securities in the Fund will generally fall. Conversely, when interest rates fall, the prices of fixed-income securities in the Fund will generally rise. Investments in the Fund are subject to possible loss due to the financial failure of issuers of underlying securities and their inability to meet their debt obligations. Investments in high-yield or lower-rated securities are subject to greater-than- average price volatility, illiquidity and possibility of default. 8 Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 Prepayment risk is the chance that an issuer may exercise its right to prepay its security, if falling interest rates prompt the issuer to do so. Forced to reinvest the unanticipated proceeds at lower interest rates, the Fund would experience a decline in income and lose the opportunity for additional price appreciation. The securities issued by U.S. Government sponsored entities (e.g., FNMA, Freddie Mac) are neither guaranteed nor issued by the U.S. Government. The Fund may invest in mortgage-backed securities, which during times of fluctu- ating interest rates may increase or decrease more than other fixed-income securities. Mortgage-backed securities are also subject to pre-payments. Investing in foreign and/or emerging markets securities involves risks relating to interest rates, currency exchange rates, economic, and political conditions. The Fund may invest in event-linked bonds and other insurance-linked securities. The return of principal and the payment of interest on insurance-linked securities are contingent on the non-occurrence of a pre-defined "trigger" event, such as a hurricane or an earthquake of a specific magnitude. The Fund may invest in floating-rate loans; the value of collateral, if any, securing a floating-rate loan can decline or may be insufficient to meet the issuer's obligations or may be difficult to liquidate. The Fund is subject to currency risk, meaning that the Fund could experience losses based on changes in the exchange rate between non-U.S. currencies and the U.S. dollar. The Fund is non-diversified, which means that it can invest a large percentage of its assets in the securities of any one or more issuers. This increases the Fund's potential risk exposure. These risks may increase share price volatility. There is no assurance that these and other strategies used by the Fund will be successful. Please see the prospectus for a more complete discussion of the Fund's risks. Before investing, consider the product's investment objectives, risks, charges and expenses. Contact your advisor or Pioneer Investments for a prospectus or summary prospectus containing this information. Read it carefully. Any information in this shareholder report regarding market or economic trends or the factors influencing the Fund's historical or future performance are statements of opinion as of the date of this report. Past performance is no guarantee of future results. Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 9 Portfolio Summary | 2/29/16 Portfolio Diversification -------------------------------------------------------------------------------- (As a percentage of total investment portfolio)(#) [THE FOLLOWING DATA WAS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL] U.S. Government Securities 55.5% Temporary Cash Investment 17.2% U.S. Corporate Bonds 11.6% International Corporate Bonds 6.2% Collateralized Mortgage Obligations 5.1% Asset Backed Securities 2.9% U.S. Preferred Stocks 1.5% (#) The chart does not include all of the Fund's derivative investments. For information regarding the Fund's derivative investments, see the Portfolio Management Discussion, the Schedule of Investments and the Notes to Financial Statements. 10 Largest Holdings -------------------------------------------------------------------------------- (As a percentage of total long-term holdings)(*) 1. U.S. Treasury Note, Floating Rate Note, 4/30/17 7.04% -------------------------------------------------------------------------------- 2. U.S. Treasury Note, Floating Rate Note, 1/31/17 7.03 -------------------------------------------------------------------------------- 3. U.S. Treasury Note, Floating Rate Note, 7/31/16 7.03 -------------------------------------------------------------------------------- 4. U.S. Treasury Note, Floating Rate Note, 10/31/16 7.03 -------------------------------------------------------------------------------- 5. U.S. Treasury Bills, 3/24/16 6.74 -------------------------------------------------------------------------------- 6. U.S. Treasury Note, Floating Rate Note, 4/30/16 6.72 -------------------------------------------------------------------------------- 7. U.S. Treasury Bills, 3/17/16 5.33 -------------------------------------------------------------------------------- 8. U.S. Treasury Note, Floating Rate Note, 10/31/17 5.32 -------------------------------------------------------------------------------- 9. U.S. Treasury Note, Floating Rate Note, 7/31/17 5.12 -------------------------------------------------------------------------------- 10. Glencore Funding LLC, 1.7%, 5/27/16 (144A) 3.62 -------------------------------------------------------------------------------- * This list excludes temporary cash investments and derivative instruments. Due to the exclusion of derivatives, the list may not represent the Fund's market exposures. See the Portfolio Management Discussion, the Schedule of Investments and the Notes to Financial Statements. The portfolio is actively managed, and current holdings may be different. The holdings listed should not be considered recommendations to buy or sell any security listed. 10 Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 Prices and Distributions | 2/29/16 Net Asset Value per Share -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Class 2/29/16 8/31/15 -------------------------------------------------------------------------------- A $8.92 $9.89 -------------------------------------------------------------------------------- C $8.88 $9.82 -------------------------------------------------------------------------------- Y $8.96 $9.91 -------------------------------------------------------------------------------- Distributions per Share: 9/1/15 - 2/29/16 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Net Investment Short-Term Long-Term Class Income Capital Gains Capital Gains -------------------------------------------------------------------------------- A $0.2460 $-- $-- -------------------------------------------------------------------------------- C $0.1781 $-- $-- -------------------------------------------------------------------------------- Y $0.2361 $-- $-- -------------------------------------------------------------------------------- Index Definitions -------------------------------------------------------------------------------- The Bank of America Merrill Lynch (BofA ML) 3-month US Treasury Bill Index is an unmanaged market index of U.S. Treasury securities maturing in 90 days, that assumes reinvestment of all income. Index returns are calculated monthly, assume reinvestment of dividends and, unlike Fund returns, do not reflect any fees, expenses or sales charges. It is not possible to invest directly in an index. The index defined here pertains to the "Value of $10,000 Investment" and "Value of $5 Million Investment" charts appearing on pages 12-14. Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 11 Performance Update | 2/29/16 Class A Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 invest- ment made in Class A shares of Pioneer Long/Short Opportunistic Credit Fund at public offering price during the periods shown, compared to that of the Bank of America Merrill Lynch (BofA ML) 3-month US Treasury Bill Index. Average Annual Total Returns (As of February 29, 2016) -------------------------------------------------------------------------------- Net Public BofA ML Asset Offering 3-Month Value Price U.S. Treasury Period (NAV) (POP) Bill Index -------------------------------------------------------------------------------- Life of Class (12/30/13) -2.49% -4.53% 0.05% 1 Year -8.02 -12.17 0.08 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated December 31, 2015) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 2.44% 1.75% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Long/Short BofA ML 3-month Opportunistic Credit Fund US Treasury Bill Index 12/13 $ 9,550 $ 10,000 2/14 $ 9,551 $ 10,001 2/15 $ 9,833 $ 10,004 2/16 $ 9,044 $ 10,012 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. NAV results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. POP returns reflect deduction of maximum 4.50% sales charge. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The net expense ratio reflects the contractual expense limitation currently in effect through January 1, 2017, for Class A shares. There can be no assurance that Pioneer will extend the expense limitation beyond such time. Please see the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. 12 Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 Performance Update | 2/29/16 Class C Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Class C Shares of Pioneer Long/Short Opportunistic Credit Fund during the periods shown, compared to that of the Bank of America Merrill Lynch (BofA ML) 3-month US Treasury Bill Index. Average Annual Total Returns (As of February 29, 2016) -------------------------------------------------------------------------------- BofA ML 3-Month If If U.S. Treasury Period Held Redeemed Bill Index -------------------------------------------------------------------------------- Life of Class (12/30/13) -3.23% -3.23% 0.05% 1 Year -8.82 -8.82 0.08 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated December 31, 2015) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 3.18% 2.50% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Long/Short BofA ML 3-month Opportunistic Credit Fund US Treasury Bill Index 12/13 $ 10,000 $ 10,000 2/14 $ 9,990 $ 10,001 2/15 $ 10,214 $ 10,004 2/16 $ 9,313 $ 10,012 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Class C shares held for less than one year are also subject to a 1% contingent deferred sales charge (CDSC). "If Held" results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The net expense ratio reflects the contractual expense limitation currently in effect through January 1, 2017, for Class C shares. There can be no assurance that Pioneer will extend the expense limitation beyond such time. Please see the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 13 Performance Update | 2/29/16 Class Y Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $5 million investment made in Class Y shares of Pioneer Long/Short Opportunistic Credit Fund during the periods shown, compared to that of the Bank of America Merrill Lynch (BofA ML) 3-month US Treasury Bill Index. Average Annual Total Returns (As of February 29, 2016) -------------------------------------------------------------------------------- Net BofA ML Asset 3-Month Value U.S. Treasury Period (NAV) Bill Index -------------------------------------------------------------------------------- Life of Class (12/30/13) -2.26% 0.05% 1 Year -7.90 0.08 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated December 31, 2015) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 2.11% 1.50% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $5 Million Investment Pioneer Long/Short BofA ML 3-month Opportunistic Credit Fund US Treasury Bill Index 12/13 $ 5,000,000 $ 5,000,000 2/14 $ 5,005,000 $ 5,000,363 2/15 $ 5,166,514 $ 5,001,901 2/16 $ 4,758,292 $ 5,005,768 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Class Y shares are not subject to sales charges and are available for limited groups of eligible investors, including institutional investors. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The net expense ratio reflects the contractual expense limitation currently in effect through January 1, 2017, for Class Y shares. There can be no assurance that Pioneer will extend the expense limitation beyond such time. Please see the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. 14 Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 Comparing Ongoing Fund Expenses As a shareowner in the Fund, you incur two types of costs: (1) ongoing costs, including management fees, distribution and/or service (12b-1) fees, and other Fund expenses; and (2) transaction costs, including sales charges (loads) on purchase payments. This example is intended to help you understand your ongoing expenses (in dollars) of investing in the Fund and to compare these costs with the ongoing costs of investing in other mutual funds. The example is based on an investment of $1,000 at the beginning of the Fund's latest six-month period and held throughout the six months. Using the Tables -------------------------------------------------------------------------------- Actual Expenses The first table below provides information about actual account values and actual expenses. You may use the information in this table, together with the amount you invested, to estimate the expenses that you paid over the period as follows: (1) Divide your account value by $1,000 Example: an $8,600 account value (divided by) $1,000 = 8.6 (2) Multiply the result in (1) above by the corresponding share class's number in the third row under the heading entitled "Expenses Paid During Period" to estimate the expenses you paid on your account during this period. Expenses Paid on a $1,000 Investment in Pioneer Long/Short Opportunistic Credit Fund Based on actual returns from September 1, 2015, through February 29, 2016. -------------------------------------------------------------------------------- Share Class A C Y -------------------------------------------------------------------------------- Beginning Account Value on 9/1/15 $1,000.00 $1,000.00 $1,000.00 -------------------------------------------------------------------------------- Ending Account Value (after expenses) on 2/29/16 $ 926.30 $ 922.00 $ 927.50 -------------------------------------------------------------------------------- Expenses Paid During Period* $ 8.14 $ 11.71 $ 6.95 -------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized net expense ratio of 1.70%, 2.45%, and 1.45%, for Class A, Class C and Class Y shares, respectively, multiplied by the average account value over the period multiplied by 182/366 (to reflect the one half year period). Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 15 Hypothetical Example for Comparison Purposes The table below provides information about hypothetical account values and hypothetical expenses based on the Fund's actual expense ratio and an assumed rate of return of 5% per year before expenses, which is not the Fund's actual return. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in the Fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds. Please note that the expenses shown in the tables are meant to highlight your ongoing costs only and do not reflect any transaction costs, such as sales charges (loads) that are charged at the time of the transaction. Therefore, the table below is useful in comparing ongoing costs only and will not help you determine the relative total costs of owning different funds. In addition, if these transaction costs were included, your costs would have been higher. Expenses Paid on a $1,000 Investment in Pioneer Long/Short Opportunistic Credit Fund Based on a hypothetical 5% return per year before expenses, reflecting the period from September 1, 2015, through February 29, 2016. -------------------------------------------------------------------------------- Share Class A C Y -------------------------------------------------------------------------------- Beginning Account Value on 9/1/15 $1,000.00 $1,000.00 $1,000.00 -------------------------------------------------------------------------------- Ending Account Value (after expenses) on 2/29/16 $1,016.41 $1,012.68 $1,017.65 -------------------------------------------------------------------------------- Expenses Paid During Period* $ 8.52 $ 12.26 $ 7.27 -------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized net expense ratio of 1.70%, 2.45%, and 1.45%, for Class A, Class C and Class Y shares, respectively, multiplied by the average account value over the period multiplied by 182/366 (to reflect the one half year period). 16 Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 Schedule of Investments | 2/29/16 (unaudited) ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- PREFERRED STOCK -- 1.3% DIVERSIFIED FINANCIALS -- 1.3% Investment Banking & Brokerage -- 1.3% 19,000 7.12 Morgan Stanley, Floating Rate Note (Perpetual) $ 534,470 ---------------------------------------------------------------------------------------------------- TOTAL PREFERRED STOCK (Cost $535,143) $ 534,470 ---------------------------------------------------------------------------------------------------- ASSET BACKED SECURITIES -- 3.1% BANKS -- 0.1% Thrifts & Mortgage Finance -- 0.1% 39,418 Icon Brand Holdings LLC, 4.229%, 1/26/43 (144A) $ 36,994 --------------- Total Banks $ 36,994 ---------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 3.0% Asset Management & Custody Banks -- 3.0% 660,000 RMAT 2015-1 LLC, 5.0%, 7/27/20 (Step) (144A) $ 648,093 659,955 VOLT XXXVII LLC, 4.375%, 7/25/45 (Step) (144A) 634,028 --------------- $ 1,282,121 --------------- Total Diversified Financials $ 1,282,121 ---------------------------------------------------------------------------------------------------- TOTAL ASSET BACKED SECURITIES (Cost $1,342,736) $ 1,319,115 ---------------------------------------------------------------------------------------------------- COLLATERALIZED MORTGAGE OBLIGATIONS -- 5.5% BANKS -- 5.5% Thrifts & Mortgage Finance -- 5.5% 250,000 5.98 Banc of America Commercial Mortgage Trust 2007-5, Floating Rate Note, 2/10/51 $ 246,655 300,000 3.21 Citigroup Commercial Mortgage Trust 2014-GC23 REMICS, Floating Rate Note, 7/12/47 (144A) 176,911 300,000 5.96 COBALT CMBS Commercial Mortgage Trust 2007-C3, Floating Rate Note, 5/15/46 279,759 47,000 5.96 COBALT CMBS Commercial Mortgage Trust 2007-C3, Floating Rate Note, 5/15/46 41,459 510,000 5.81 COMM 2007-C9 Mortgage Trust, Floating Rate Note, 12/10/49 (144A) 466,104 47,274 5.23 Credit Suisse First Boston Mortgage Securities Corp., Floating Rate Note, 12/17/40 47,187 300,000 5.10 Credit Suisse First Boston Mortgage Securities Corp., Floating Rate Note, 8/15/38 282,152 92,613 5.18 EQTY 2014-MZ Mezzanine Trust, Floating Rate Note, 5/10/19 (144A) 92,293 123,421 4.94 GS Mortgage Securities Corp II Series 2005-GG4, Floating Rate Note, 7/10/39 114,082 138,406 5.86 GS Mortgage Securities Trust 2006-GG6, Floating Rate Note, 4/10/38 138,315 200,000 JP Morgan Chase Commercial Mortgage Securities Trust 2006-CIBC16, 5.623%, 5/12/45 192,499 The accompanying notes are an integral part of these financial statements. Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 17 Schedule of Investments | 2/29/16 (unaudited) (continued) ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 70,000 5.48 ML-CFC Commercial Mortgage Trust 2006-3, Floating Rate Note, 7/12/46 $ 69,834 195,000 Wells Fargo Commercial Mortgage Trust 2010-C1, 4.0%, 11/18/43 (144A) 167,123 --------------- $ 2,314,373 --------------- Total Banks $ 2,314,373 ---------------------------------------------------------------------------------------------------- TOTAL COLLATERALIZED MORTGAGE OBLIGATIONS (Cost $2,400,767) $ 2,314,373 ---------------------------------------------------------------------------------------------------- CORPORATE BONDS -- 19.1% ENERGY -- 4.7% Oil & Gas Drilling -- 3.1% 1,305,000 Transocean, Inc., 5.55%, 12/15/16 $ 1,291,950 ---------------------------------------------------------------------------------------------------- Integrated Oil & Gas -- 1.6% 680,000 Petrobras Global Finance BV, 3.5%, 2/6/17 $ 667,250 --------------- Total Energy $ 1,959,200 ---------------------------------------------------------------------------------------------------- MATERIALS -- 4.7% Metal & Glass Containers -- 1.5% 620,000 Beverage Packaging Holdings Luxembourg II SA, 5.625%, 12/15/16 (144A) $ 619,225 ---------------------------------------------------------------------------------------------------- Steel -- 3.2% 1,375,000 Glencore Funding LLC, 1.7%, 5/27/16 (144A) $ 1,361,250 --------------- Total Materials $ 1,980,475 ---------------------------------------------------------------------------------------------------- BANKS -- 4.7% Diversified Banks -- 4.7% 530,000 6.50 Bank of America Corp., Floating Rate Note, 10/23/49 $ 540,600 530,000 5.90 Citigroup, Inc., Floating Rate Note (Perpetual) 503,638 530,000 6.62 Credit Agricole SA, Floating Rate Note (Perpetual) (144A) 466,969 530,000 6.50 ING Groep NV, Floating Rate Note, 12/29/49 479,981 --------------- $ 1,991,188 --------------- Total Banks $ 1,991,188 ---------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 0.1% Other Diversified Financial Services -- 0.1% INR 3,700,000 European Bank for Reconstruction & Development, 6.0%, 3/3/16 $ 54,250 --------------- Total Diversified Financials $ 54,250 ---------------------------------------------------------------------------------------------------- INSURANCE -- 1.8% Reinsurance -- 1.8% 250,000 7.17 Caelus Re, Ltd., Floating Rate Note, 4/7/17 (Cat Bond) (144A) $ 253,525 250,000 4.67 Kilimanjaro Re, Ltd., Floating Rate Note, 4/30/18 (Cat Bond) (144A) 246,525 The accompanying notes are an integral part of these financial statements. 18 Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- Reinsurance -- (continued) 250,000 4.75 Residential Reinsurance 2012, Ltd., Floating Rate Note, 12/6/16 (Cat Bond) (144A) $ 249,950 --------------- $ 750,000 --------------- Total Insurance $ 750,000 ---------------------------------------------------------------------------------------------------- TELECOMMUNICATION SERVICES -- 3.1% Wireless Telecommunication Services -- 3.1% 1,290,000 Sprint Communications, Inc., 6.0%, 12/1/16 $ 1,280,325 --------------- Total Telecommunication Services $ 1,280,325 ---------------------------------------------------------------------------------------------------- TOTAL CORPORATE BONDS (Cost $8,177,680) $ 8,015,438 ---------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- 59.4% 1,350,000 Federal Home Loan Bank Discount Notes, 3/2/16 (c) $ 1,349,989 150,000 Federal Home Loan Bank Discount Notes, 3/21/16 (c) 149,977 250,000 U.S. Treasury Bills, 3/10/16 (c) 249,989 2,000,000 U.S. Treasury Bills, 3/17/16 (c) 1,999,806 2,530,000 U.S. Treasury Bills, 3/24/16 (c) 2,529,623 1,025,425 U.S. Treasury Inflation Indexed Bonds, 1.375%, 2/15/44 1,108,487 2,640,000 0.40 U.S. Treasury Note, Floating Rate Note, 1/31/17 (d) 2,640,528 2,640,000 0.37 U.S. Treasury Note, Floating Rate Note, 10/31/16 (d) 2,640,063 2,000,000 0.49 U.S. Treasury Note, Floating Rate Note, 10/31/17 (d) 1,999,012 2,525,000 0.39 U.S. Treasury Note, Floating Rate Note, 4/30/16 2,525,189 2,645,000 0.39 U.S. Treasury Note, Floating Rate Note, 4/30/17 (d) 2,643,971 2,640,000 0.39 U.S. Treasury Note, Floating Rate Note, 7/31/16 2,640,428 1,925,000 0.40 U.S. Treasury Note, Floating Rate Note, 7/31/17 1,922,956 525,000 0.60 U.S. Treasury Note, Floating Rate Note, 1/31/18 525,349 --------------- $ 24,925,367 ---------------------------------------------------------------------------------------------------- TOTAL U.S. GOVERNMENT AND AGENCY OBLIGATIONS (Cost $24,861,466) $ 24,925,367 ---------------------------------------------------------------------------------------------------- TEMPORARY CASH INVESTMENT -- 18.4% Repurchase Agreement -- 18.4% 7,760,000 $7,760,000 RBC Capital Markets LLC, 0.27%, dated 2/29/16 plus accrued interest on 3/1/16 collateralized by the following: $938,066 Freddie Mac Giant, 4.00%, 11/1/43 $57,672 Federal Home Loan Mortgage Corp., 2.209-2.444%, 3/1/40-2/1/46 $1,587,586 Federal National Mortgage Association (ARM), 2.011-4.865%, 9/1/33-11/1/46 $5,331,876 Federal National Mortgage Association, 3.5-5.5%, 8/1/40-2/1/46 $ 7,760,000 ---------------------------------------------------------------------------------------------------- TOTAL TEMPORARY CASH INVESTMENT (Cost $7,760,000) $ 7,760,000 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 19 Schedule of Investments | 2/29/16 (unaudited) (continued) ---------------------------------------------------------------------------------------------------- Number of Strike Expiration Contracts Description Counterparty Price Date Value ---------------------------------------------------------------------------------------------------- PUT OPTIONS PURCHASED -- 1.1% 104 S&P500 EMINI Citibank NA $1,810 4/15/16 $ 21,580 101 S&P500 EMINI Citibank NA 1,610 6/17/16 31,310 101 S&P500 EMINI Citibank NA 1,510 6/17/16 146,450 104 S&P500 EMINI Citibank NA 1,710 4/15/16 245,960 --------------- $ 445,300 ---------------------------------------------------------------------------------------------------- TOTAL PUT OPTIONS PURCHASED (Premiums paid $650,197) $ 445,300 ---------------------------------------------------------------------------------------------------- TOTAL INVESTMENT IN SECURITIES -- 107.9% (Cost $45,727,989) (a) $ 45,314,063 ---------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------- Number of Strike Expiration Contracts Description Counterparty Price Date ---------------------------------------------------------------------------------------------------- PUT OPTIONS WRITTEN -- (0.7)% (104) S&P500 EMINI Citibank NA $1,610 4/15/16 $ (110,760) (101) S&P500 EMINI Citibank NA 1,410 6/17/16 (87,870) (101) S&P500 EMINI Citibank NA 1,710 6/17/16 (53,025) (104) S&P500 EMINI Citibank NA 1,910 4/15/16 (48,360) --------------- $ (300,015) ---------------------------------------------------------------------------------------------------- TOTAL PUT OPTIONS WRITTEN (Premiums received $498,381) $ (300,015) ---------------------------------------------------------------------------------------------------- OTHER ASSETS & LIABILITIES -- (7.2)% $ (3,036,575) ---------------------------------------------------------------------------------------------------- TOTAL NET ASSETS -- 100.0% $ 41,977,473 ==================================================================================================== (144A) Security is exempt from registration under Rule 144A of the Securities Act of 1933. Such securities may be resold normally to qualified institutional buyers in a transaction exempt from registration. At February 29, 2016, the value of these securities amounted to $5,418,990 or 12.9% of total net assets. (Cat Bond) Catastrophe or Event Linked Bond. At February 29, 2016, the value of these securities amounted to $750,000, or 1.8% of total net assets. See Notes to Financial Statements -- Note 1J. (Perpetual) Security with no stated maturity date. (Step) Bond issued with an initial coupon rate which converts to a higher rate at a later date. REMICS Real Estate Mortgage Investment Conduits. ARM Adjustable Rate Mortgage. (a) At February 29, 2016, the net unrealized depreciation on investments based on cost for federal income tax purposes of $45,727,989 was as follows: Aggregate gross unrealized appreciation for all investments in which there is an excess of value over tax cost $ 120,623 Aggregate gross unrealized depreciation for all investments in which there is an excess of tax cost over value (534,549) --------------- Net unrealized depreciation $ (413,926) =============== The accompanying notes are an integral part of these financial statements. 20 Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 (b) Debt obligation with a variable interest rate. Rate shown is rate at end of period. (c) Security issued with a zero coupon. Income is earned through accretion of discount. (d) All or a portion of this security has been pledged in connection with open futures and swap contracts. NOTE: Principal amounts are denominated in U.S. Dollars unless otherwise noted: INR Indian Rupee Purchases and sales of securities (excluding temporary cash investments) for the six months ended February 29, 2016 were as follows: ---------------------------------------------------------------------------------------- Purchases Sales ---------------------------------------------------------------------------------------- Long-Term U.S. Government Securities $8,351,935 $ 4,284,861 Other Long-Term Securities $8,580,184 $10,252,914 CENTRALLY CLEARED CREDIT DEFAULT SWAP AGREEMENTS -- BUY PROTECTION ---------------------------------------------------------------------------------------------------------------------- Notional Obligation Expiration Premiums Unrealized Principal ($) Exchange Entity/Index Coupon Date (Received) Appreciation ---------------------------------------------------------------------------------------------------------------------- (1,185,600) Chicago Markit CDX North 5.00% 12/20/18 $ (234,749) $ 59,460 Mercantile America High Exchange Yield Index (1,506,500) Chicago Markit CDX North 5.00% 12/20/16 (89,787) 44,896 Mercantile America High Exchange Yield Index (26,335,000) Chicago Markit CDX North 5.00% 12/20/20 (301,125) 279,951 Mercantile America High Exchange Yield Index EUR (2,704,167) Chicago Markit iTraxx Europe 5.00% 6/20/19 (395,460) 163,703 Mercantile Crossover Index Exchange ---------------------------------------------------------------------------------------------------------------------- Total $ (1,021,121) $ 548,010 ====================================================================================================================== The accompanying notes are an integral part of these financial statements. Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 21 Schedule of Investments | 2/29/16 (unaudited) (continued) CREDIT DEFAULT SWAP AGREEMENTS -- BUY PROTECTION ---------------------------------------------------------------------------------------------------------------------- Net Premiums Unrealized Notional Obligation Expiration Paid Appreciation Principal ($) Counterparty Entity/Index Coupon Date (Received) (Depreciation) ---------------------------------------------------------------------------------------------------------------------- (225,000) Barclays Morgan Stanley Co. 1.00% 12/20/20 $ (1,563) $ 2,516 Bank Plc (135,000) Barclays Morgan Stanley Co. 1.00% 12/20/20 (735) 1,648 Bank Plc (805,000) Barclays Republic of Turkey 1.00% 12/20/20 59,575 6,768 Bank Plc EUR (745,000) Barclays Republic of Turkey 1.00% 12/20/20 55,502 5,897 Bank Plc EUR (595,000) Goldman Sachs Barclays Bank Plc 1.00% 12/20/20 73,356 (27,699) International EUR (595,000) Goldman Sachs HSBC Holdings Plc 1.00% 12/20/20 67,260 (29,066) International (364,800) Goldman Sachs MBIA Inc. 5.00% 12/20/20 105,792 46,115 International EUR (1,500,000) Goldman Sachs Norske 5.00% 9/20/17 806,508 (155,857) International Skogindustrier ASA (225,000) JPMorgan Bank of 1.00% 12/20/20 (2,239) 2,659 Chase Bank NA America Corp. (180,000) JPMorgan Bank of 1.00% 12/20/20 (1,609) 1,944 Chase Bank NA America Corp. (225,000) JPMorgan Citigroup, Inc. 1.00% 12/20/20 (1,339) 1,446 Chase Bank NA (180,000) JPMorgan Citigroup, Inc. 1.00% 12/20/20 (801) 887 Chase Bank NA EUR (460,000) JPMorgan Credit Agricole SA 1.00% 12/20/20 (5,798) 6,197 Chase Bank NA EUR (460,000) JPMorgan ING Groep N.V. 1.00% 12/20/20 (8,202) 2,839 Chase Bank NA ---------------------------------------------------------------------------------------------------------------------- Total $ 1,145,707 $ (133,706) ====================================================================================================================== NOTE: Principal Amounts are denominated in U.S. dollars unless otherwise noted: EUR Euro The accompanying notes are an integral part of these financial statements. 22 Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 CENTRALLY CLEARED CREDIT DEFAULT SWAP AGREEMENTS -- SELL PROTECTION ---------------------------------------------------------------------------------------------------------------------- Net Unrealized Notional Obligation Credit Expiration Premiums Appreciation Principal ($)(1) Exchange Entity/Index Coupon Rating(2) Date (Paid) (Depreciation) ---------------------------------------------------------------------------------------------------------------------- 655,000 Chicago Markit CDX 5.00% BBB+ 12/20/17 $ (32,095) $ (61,184) Mercantile North America Exchange Investment Grade Index 400,000 Chicago Markit CDX 5.00% BBB+ 12/20/17 (14,500) (47,520) Mercantile North America Exchange Investment Grade Index EUR 2,500,000 Chicago Markit iTraxx 1.00% BBB+ 6/20/19 (216,543) 55,924 Mercantile Europe index Exchange ---------------------------------------------------------------------------------------------------------------------- Total $ (263,138) $ (52,780) ====================================================================================================================== (1) The notional amount is the maximum amount that a seller of credit protection would be obligated to pay upon occurrence of a credit event. (2) Based on Standard & Poor's rating of the issuer or weighted average of all the underlying securities of the index. NOTE: Principal Amounts are denominated in U.S. dollars unless otherwise noted: EUR Euro CREDIT DEFAULT SWAP AGREEMENTS -- SELL PROTECTION ---------------------------------------------------------------------------------------------------------------------- Net Premiums Unrealized Notional Obligation Credit Expiration Received Appreciation Principal ($)(1) Counterparty Entity/Index Coupon Rating(2) Date (Paid) (Depreciation) ---------------------------------------------------------------------------------------------------------------------- 1,335,000 Barclays Frontier 5.00% BB- 12/20/20 $ (72,039) $ 46,933 Bank Plc Communications Corp. 560,000 Barclays Hovnanian 5.00% B- 12/20/16 (27,922) 8,331 Bank Plc Enterprises Inc. 230,000 Barclays Hovnanian 5.00% B- 12/20/16 (10,925) 2,878 Bank Plc Enterprises Inc. 90,000 Barclays iHeartMedia, 5.00% CCC 12/20/16 (22,050) (5,051) Bank Plc Inc. 375,000 Barclays iHeartMedia, 5.00% CCC 12/20/16 (112,500) (421) Bank Plc Inc. 1,230,000 Barclays Teck Resources, 5.00% B+ 12/20/16 (41,512) 40,737 Bank Plc Ltd. 550,000 Barclays The McClatchy 5.00% B- 6/20/16 -- 7,983 Bank Plc Co. 520,000 Barclays Toys R Us, Inc. 5.00% B- 3/20/16 (2,600) 6,715 Bank Plc 620,000 Barclays Weatherford 1.00% BB+ 12/20/16 (24,800) (6,370) Bank Plc International Plc The accompanying notes are an integral part of these financial statements. Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 23 Schedule of Investments | 2/29/16 (unaudited) (continued) CREDIT DEFAULT SWAP AGREEMENTS -- SELL PROTECTION (continued) ---------------------------------------------------------------------------------------------------------------------- Net Premiums Unrealized Notional Obligation Credit Expiration Received Appreciation Principal ($)(1) Counterparty Entity/Index Coupon Rating(2) Date (Paid) (Depreciation) ---------------------------------------------------------------------------------------------------------------------- 1,135,000 Goldman Sachs AK Steel 5.00% B- 12/20/16 $ (28,375) $ (13,689) International Holding Corp. 285,000 Goldman Sachs AK Steel 5.00% B- 12/20/16 (22,088) 11,525 International Holding Corp. 705,000 Goldman Sachs Ally Financial, 5.00% BB+ 12/20/20 113,696 (41,660) International Inc. 855,000 Goldman Sachs Bombardier 5.00% BBB+ 12/20/16 (16,258) 20,561 International Capital, Inc. 400,000 Goldman Sachs Bombardier 5.00% BBB+ 12/20/16 (1,000) 3,013 International Capital, Inc. 480,000 Goldman Sachs Hovnanian 5.00% B- 12/20/16 (16,800) 7 International Enterprises, Inc. 885,000 Goldman Sachs iHeartMedia, 5.00% CCC 12/20/16 (48,675) (217,819) International Inc. 364,800 Goldman Sachs MBIA, Inc. 5.00% A- 12/20/16 (41,952) (21,083) International EUR 250,000 Goldman Sachs Norske 5.00% CC 3/20/16 (5,481) (11,067) International Skogindustrier ASA EUR 1,500,000 Goldman Sachs Norske 5.00% CC 9/20/20 (1,192,960) (115,436) International Skogindustrier ASA 150,000 Goldman Sachs Peabody Energy 5.00% D 3/20/16 (11,250) (12,684) International Corp. 620,000 Goldman Sachs Petroleo 1.00% B+ 12/20/16 (23,823) 485 International Brasileiro SA 355,000 JPMorgan Ally Financial, 5.00% BB+ 12/20/20 45,513 (9,240) Chase Bank NA Inc. 135,000 JPMorgan Ally Financial, 5.00% BB+ 12/20/20 6,129 7,666 Chase Bank NA Inc. 525,000 Morgan Stanley J.C. Penney 5.00% CCC+ 12/20/16 (15,750) 35,145 Capital Company, Inc. Services LLC 875,000 Morgan Stanley Sears Holdings 5.00% CCC+ 12/20/16 (24,061) (56,990) Capital Corp. Services LLC ---------------------------------------------------------------------------------------------------------------------- Total $(1,597,483) $ (319,531) ====================================================================================================================== (1) The notional amount is the maximum amount that a seller of credit protection would be obligated to pay upon occurrence of a credit event. The accompanying notes are an integral part of these financial statements. 24 Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 (2) Based on Standard & Poor's rating of the issuer or weighted average of all the underlying securities of the index. NR Not rated by either S&P or Moody's. NOTE: Principal amounts are denominated in U.S. Dollars unless otherwise noted: EUR Euro INTEREST RATE SWAP AGREEMENTS --------------------------------------------------------------------------------------------------------------------- Annual Notional Pay/ Floating Fixed Expiration Premiums Unrealized Principal ($) Counterparty Receive Rate Rate Date Paid Depreciation --------------------------------------------------------------------------------------------------------------------- (951,858) J.P. Morgan LIBOR USD 1.819% 8/7/19 $ 4 $ (27,721) Securities LLC Receive 3 Month (1,018,659) J.P. Morgan LIBOR USD 2.202% 5/6/25 8 (66,616) Securities LLC Receive 3 Month --------------------------------------------------------------------------------------------------------------------- Total $ 12 $ (94,337) ===================================================================================================================== TOTAL RETURN SWAP AGREEMENTS ---------------------------------------------------------------------------------------------------------------------- Obligation Notional Pay / Entity/ Expiration Unrealized Principal ($) Counterparty Receive Index Coupon Date (Depreciation) ---------------------------------------------------------------------------------------------------------------------- 8,335,000 JPMorgan Pay iBoxx USD 0.5695% 3/20/16 $ (186,848) Chase Bank NA Liquid High Yield Index 8,335,000 JPMorgan Pay iBoxx USD 0.5695% 3/20/16 (173,290) Chase Bank NA Liquid High Yield Index 4,165,000 JPMorgan Pay iBoxx USD 0.5695% 3/20/16 (86,593) Chase Bank NA Liquid High Yield Index 4,165,000 JPMorgan Pay iBoxx USD 0.5695% 3/20/16 (91,116) Chase Bank NA Liquid High Yield Index ---------------------------------------------------------------------------------------------------------------------- Total $ (537,847) ====================================================================================================================== Various inputs are used in determining the value of the Fund's investments. These inputs are summarized in the three broad levels listed below. Level 1 - quoted prices in active markets for identical securities. Level 2 - other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.) See Notes to Financial Statements -- Note 1A. Level 3 - significant unobservable inputs (including the Fund's own assumptions in determining fair value of investments) See Notes to Financial Statements -- Note 1A. The accompanying notes are an integral part of these financial statements. Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 25 Schedule of Investments | 2/29/16 (unaudited) (continued) --------------------------------------------------------------------------------------- Level 1 Level 2 Level 3 Total --------------------------------------------------------------------------------------- Preferred Stock $ 534,470 $ -- $ -- $ 534,470 Asset Backed Securities -- 1,319,115 -- 1,319,115 Collateralized Mortgage Obligations -- 2,314,373 -- 2,314,373 Corporate Bonds -- 8,015,438 -- 8,015,438 U.S. Government and Agency Obligations -- 24,925,367 -- 24,925,367 Repurchase Agreement -- 7,760,000 -- 7,760,000 Put Options Purchased 445,300 -- -- 445,300 --------------------------------------------------------------------------------------- Total $ 979,770 $44,334,293 $ -- $45,314,063 --------------------------------------------------------------------------------------- Other Financial Instruments Net unrealized Appreciation on Default Swaps $ -- $ 41,993 $ -- $ 41,993 Unrealized Depreciation on Interest Rate Swaps -- (94,337) -- (94,337) Unrealized Depreciation on Total Return Swaps -- (537,847) -- (537,847) Put Options Written (300,015) -- -- (300,015) Unrealized Appreciation on Futures Contracts 4,750 -- -- 4,750 Unrealized Appreciation on Forward Foreign Currency Contracts -- 47,589 -- 47,589 Unrealized Depreciation on Forward Foreign Currency Contracts -- (57,839) -- (57,839) --------------------------------------------------------------------------------------- Total Other Financial Instruments $ (295,265) $ (600,441) $ -- $ (895,706) --------------------------------------------------------------------------------------- During the six months ended February 29, 2016, there were no transfers between Levels 1, 2 and 3. The following is a summary of the fair valuation of certain Fund's assets as of February 29, 2016: --------------------------------------------------------------------------------------- Level 1 Level 2 Level 3 Total --------------------------------------------------------------------------------------- Assets: Restricted cash $ -- $ 578,298 $ -- $ 578,298 Variation margin for centrally cleared swap contracts -- (102,902) -- (102,902) Liabilities: Due to custodian, at value (cost $(587,497)) -- (534,570) -- (534,570) Variation margin for futures contracts (4,781) -- -- (4,781) --------------------------------------------------------------------------------------- Total $ (4,781) $ (59,174) $ -- $ (63,955) ======================================================================================= The accompanying notes are an integral part of these financial statements. 26 Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 Statement of Assets and Liabilities | 2/29/16 (unaudited) ASSETS: Investment in securities (cost $37,967,989) $37,554,063 Repurchase agreement (cost $7,760,000) 7,760,000 --------------------------------------------------------------------------------------- Total investment in securities (cost $45,727,989) 45,314,063 Cash 355,561 Restricted Cash* 578,298 Receivables -- Fund shares sold 3,000 Swap payments 194,702 Interest 117,130 Due from Pioneer Investment Management, Inc. 25,735 Unrealized appreciation on futures contracts 4,750 Unrealized appreciation on forward foreign currency contracts 47,589 Other assets 26,293 --------------------------------------------------------------------------------------- Total assets $46,667,121 ======================================================================================= LIABILITIES: Payables -- Investment securities purchased $ 627,556 Fund shares repurchased 632,790 Trustee fees 1,191 Due to custodian, at value (cost $(587,497)) 534,570 Unrealized depreciation on forward foreign currency contracts 57,839 Net unrealized depreciation on swap contracts 590,191 Swap contracts, net premiums received 1,736,023 Variation margin on futures contracts 4,781 Variation margin for centrally cleared swap contracts 102,902 Written options (premiums received $498,381) 300,015 Due to affiliates 29,108 Accrued expenses 72,682 --------------------------------------------------------------------------------------- Total liabilities $ 4,689,648 ======================================================================================= NET ASSETS: Paid-in capital $47,584,306 Distributions in excess of net investment income (99,739) Accumulated net realized loss on investments, futures contracts, written options, swap contracts, and foreign currency transactions (4,707,838) Net unrealized depreciation on investments (413,926) Unrealized appreciation on futures contracts 4,750 Net unrealized appreciation on written options 198,366 Net unrealized depreciation on swap contracts (590,191) Net unrealized appreciation on forward foreign currency contracts and other assets and liabilities denominated in foreign currencies 1,745 --------------------------------------------------------------------------------------- Total net assets $41,977,473 ======================================================================================= NET ASSET VALUE PER SHARE: (No par value, unlimited number of shares authorized) Class A (based on $9,830,120/1,102,649 shares) $ 8.92 Class C (based on $8,665,675/976,014 shares) $ 8.88 Class Y (based on $23,481,678/2,622,186 shares) $ 8.96 MAXIMUM OFFERING PRICE: Class A ($8.92 / 95.5%) $ 9.34 ======================================================================================= * Represents restricted cash deposited at the counterparty for derivative contracts. The accompanying notes are an integral part of these financial statements. Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 27 Statement of Operations (unaudited) For the Six Months Ended 2/29/16 INVESTMENT INCOME: Dividends $ 40,218 Interest 570,744 ---------------------------------------------------------------------------------------------------------- Total investment income $ 610,962 ---------------------------------------------------------------------------------------------------------- EXPENSES: Management fees $ 280,708 Distribution fees Class A 13,124 Class C 44,855 Transfer Agent fees Class A 593 Class C 418 Class Y 226 Shareholder communications expense 5,370 Administrative expense 15,248 Custodian fees 34,961 Registration fees 21,995 Professional fees 62,096 Printing fees 8,151 Pricing fees 17,638 Fees and expenses of nonaffiliated Trustees 3,553 Miscellaneous 2,194 ---------------------------------------------------------------------------------------------------------- Total expenses $ 511,130 ---------------------------------------------------------------------------------------------------------- Less fees waived and expenses reimbursed by Pioneer Investment Management, Inc. (99,215) ---------------------------------------------------------------------------------------------------------- Net expenses $ 411,915 ---------------------------------------------------------------------------------------------------------- Net investment income $ 199,047 ---------------------------------------------------------------------------------------------------------- REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS, FUTURES CONTRACTS, WRITTEN OPTIONS, SWAP CONTRACTS AND FOREIGN CURRENCY TRANSACTIONS: Net realized gain (loss) on: Investments $ (1,305,674) Futures contracts (324,519) Written options 448,665 Swap contracts (2,145,893) Forward foreign currency contracts and other assets and liabilities denominated in foreign currencies (56,457) $ (3,383,878) ---------------------------------------------------------------------------------------------------------- Change in net unrealized appreciation (depreciation) on: Investments $ (660,963) Futures contracts 5,297 Written options 490,795 Swap contracts (418,412) Forward foreign currency contracts and other assets and liabilities denominated in foreign currencies (23,032) $ (606,315) ---------------------------------------------------------------------------------------------------------- Net realized and unrealized gain (loss) on investments, futures contracts, written options, swap contracts, and foreign currency transactions $ (3,990,193) ---------------------------------------------------------------------------------------------------------- Net decrease in net assets resulting from operations $ (3,791,146) ========================================================================================================== The accompanying notes are an integral part of these financial statements. 28 Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 Statements of Changes in Net Assets ------------------------------------------------------------------------------------------------- Six Months Ended Year 2/29/16 Ended (unaudited) 8/31/15 ------------------------------------------------------------------------------------------------- FROM OPERATIONS: Net investment income (loss) $ 199,047 $ 43,086 Net realized gain (loss) on investments, futures contracts, written options, swap contracts, and foreign currency transactions (3,383,878) 352,928 Change in net unrealized appreciation (depreciation) on investments, futures contracts, written options, swap contracts, and foreign currency transactions (606,315) (496,999) ------------------------------------------------------------------------------------------------- Net decrease in net assets resulting from operations $ (3,791,146) $ (100,985) ------------------------------------------------------------------------------------------------- DISTRIBUTIONS TO SHAREOWNERS: Net investment income: Class A ($0.25 and $0.33 per share, respectively) $ (267,690) $ (290,990) Class C ($0.18 and $0.28 per share, respectively) (170,886) (237,127) Class Y ($0.24 and $0.35 per share, respectively) (729,007) (292,420) ------------------------------------------------------------------------------------------------- Total distributions to shareowners $ (1,167,583) $ (820,537) ------------------------------------------------------------------------------------------------- FROM FUND SHARE TRANSACTIONS: (a)(b) Net proceeds from sale of shares $ 1,157,341 $30,657,269 Reinvestment of distributions 712,918 820,545 Cost of shares repurchased (8,384,504) (3,141,008) ------------------------------------------------------------------------------------------------- Net increase (decrease) in net assets resulting from Fund share transactions $ (6,514,245) $28,336,806 ------------------------------------------------------------------------------------------------- Net increase (decrease) in net assets $ (11,472,974) $27,415,284 NET ASSETS: Beginning of period $ 53,450,447 $26,035,163 ------------------------------------------------------------------------------------------------- End of period $ 41,977,473 $53,450,447 ------------------------------------------------------------------------------------------------- Undistributed (distributions in excess of) net investment income $ (99,739) $ 868,797 ================================================================================================= (a) At February 29, 2016, PIM owned 56.2% of the value of the outstanding shares of Pioneer Long/Short Opportunistic Credit Fund. (b) At February 29, 2016, Pioneer Asset Allocation Trust owned 31.0% of the value of the outstanding shares of Pioneer Long/Short Opportunistic Credit Fund. The accompanying notes are an integral part of these financial statements. Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 29 Statements of Changes in Net Assets (continued) ------------------------------------------------------------------------------------ Six Months Six Months Ended Ended Year Year 2/29/16 2/29/16 Ended Ended Shares Amount 8/31/15 8/31/15 (unaudited) (unaudited) Shares Amount ------------------------------------------------------------------------------------ Class A Shares sold 5,991 $ 76,520 345,034 $ 3,451,984 Reinvestment of distributions 29,417 267,690 29,815 290,998 Less shares repurchased (94,021) (897,039) (107,896) (1,072,297) ------------------------------------------------------------------------------------ Net increase (decrease) (58,613) $ (552,829) 266,953 $ 2,670,685 ==================================================================================== Class C Shares sold 14,728 $ 136,751 113,452 $ 1,133,511 Reinvestment of distributions 18,841 170,886 24,346 237,127 Less shares repurchased (11,654) (107,964) (19,101) (188,852) ------------------------------------------------------------------------------------ Net increase 21,915 $ 199,673 118,697 $ 1,181,786 ==================================================================================== Class Y Shares sold 98,956 $ 944,070 2,603,899 $26,071,774 Reinvestment of distributions 30,016 274,342 29,930 292,420 Less shares repurchased (798,318) (7,379,501) (190,908) (1,879,859) ------------------------------------------------------------------------------------ Net increase (decrease) (669,346) $ (6,161,089) 2,442,921 $24,484,335 ==================================================================================== The accompanying notes are an integral part of these financial statements. 30 Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 Financial Highlights ----------------------------------------------------------------------------------------------- Six Months Ended Year 2/29/16 Ended 12/30/13 (unaudited) 8/31/15 to 8/31/14 ----------------------------------------------------------------------------------------------- Class A Net asset value, beginning of period $ 9.89 $ 10.11 $ 10.00 ----------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) $ 0.04(b) $ 0.06 $ (0.01) Net realized and unrealized gain (loss) on investments (0.76) 0.05 0.12 ----------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ (0.72) $ 0.11 $ 0.11 ----------------------------------------------------------------------------------------------- Distribution to shareowners: Net investment income $ (0.25) $ (0.33) $ -- ----------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ (0.97) $ (0.22) $ 0.11 ----------------------------------------------------------------------------------------------- Net asset value, end of period $ 8.92 $ 9.89 $ 10.11 =============================================================================================== Total return* (7.37)% 1.12% 1.10%(a) Ratio of net expenses to average net assets 1.70%** 1.70% 1.70%** Ratio of net investment income (loss) to average net assets 0.80%** 0.35% (0.15)%** Portfolio turnover rate 79%** 130% 100%** Net assets, end of period (in thousands) $ 9,830 $11,479 $ 9,040 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses to average net assets 2.12%** 2.39% 2.85%** Net investment income (loss) to average net assets 0.38%** (0.34)% (1.30)%** =============================================================================================== * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period and no sales charges. Total return would be reduced if sales charges were taken into account. ** Annualized. (a) Not annualized. (b) The per share data presented above is based on the average shares outstanding for the period presented. The accompanying notes are an integral part of these financial statements. Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 31 Financial Highlights (continued) ----------------------------------------------------------------------------------------------- Six Months Ended Year 2/29/16 Ended 12/30/13 (unaudited) 8/31/15 to 8/31/14 ----------------------------------------------------------------------------------------------- Class C Net asset value, beginning of period $ 9.82 $ 10.06 $ 10.00 ----------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) $ 0.00(b)(c) $ (0.02) $ (0.06) Net realized and unrealized gain (loss) on investments (0.76) 0.06 0.12 ----------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ (0.76) $ 0.04 $ 0.06 ----------------------------------------------------------------------------------------------- Distribution to shareowners: Net investment income $ (0.18) $ (0.28) $ -- ----------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ (0.94) $ (0.24) $ 0.06 ----------------------------------------------------------------------------------------------- Net asset value, end of period $ 8.88 $ 9.82 $ 10.06 =============================================================================================== Total return* (7.80)% 0.40% 0.60%(a) Ratio of net expenses to average net assets 2.45%** 2.45% 2.45%** Ratio of net investment income (loss) to average net assets 0.06%** (0.34)% (0.91)%** Portfolio turnover rate 79%** 130% 100%** Net assets, end of period (in thousands) $ 8,666 $ 9,364 $ 8,403 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses to average net assets 2.86%** 3.13% 3.58%** Net investment income (loss) to average net assets (0.35)%** (1.02)% (2.04)%** =============================================================================================== * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period and no sales charges. Total return would be reduced if sales charges were taken into account. ** Annualized. (a) Not annualized. (b) The per share data presented above is based on the average shares outstanding for the period presented. (c) Amount rounds to less than $0.01 or $(0.01) per share. The accompanying notes are an integral part of these financial statements. 32 Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 ----------------------------------------------------------------------------------------------- Six Months Ended Year 2/29/16 Ended 12/30/13 (unaudited) 8/31/15 to 8/31/14 ----------------------------------------------------------------------------------------------- Class Y Net asset value, beginning of period $ 9.91 $ 10.13 $ 10.00 ----------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) $ 0.05(c) $ 0.09 $ 0.01(a) Net realized and unrealized gain (loss) on investments (0.76) 0.04 0.12 ----------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ (0.71) $ 0.13 $ 0.13 ----------------------------------------------------------------------------------------------- Distribution to shareowners: Net investment income $ (0.24) $ (0.35) $ -- ----------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ (0.95) $ (0.22) $ 0.13 ----------------------------------------------------------------------------------------------- Net asset value, end of period $ 8.96 $ 9.91 $ 10.13 =============================================================================================== Total return* (7.25)% 1.29% 1.30%(b) Ratio of net expenses to average net assets 1.45%** 1.45% 1.45%** Ratio of net investment income (loss) to average net assets 1.05%** 0.28% 0.10%** Portfolio turnover rate 79%** 130% 100%** Net assets, end of period (in thousands) $23,482 $32,607 $ 8,592 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses to average net assets 1.85%** 2.06% 2.58%** Net investment income (loss) to average net assets 0.65%** (0.33)% (1.03)%** =============================================================================================== * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period and no sales charges. ** Annualized. (a) The amount shown for a share outstanding does not correspond to the Net Investment Loss on the Statement of Operations due to the timing of sales and repurchases of shares. (b) Not annualized. (c) The per share data presented above is based on the average shares outstanding for the period presented. The accompanying notes are an integral part of these financial statements. Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 33 Notes to Financial Statements | 2/29/16 (unaudited) 1. Organization and Significant Accounting Policies Pioneer Long/Short Opportunistic Credit Fund (the Fund) is one of five portfolios comprising Pioneer Series Trust V, a Delaware statutory trust. The Fund is registered under the Investment Company Act of 1940 as a diversified, open-end management investment company. The Fund's investment objective is to seek total return. The Fund offers three classes of shares designated as Class A, Class C and Class Y shares. Class A, Class C and Class Y shares commenced operations on December 30, 2013. Each class of shares represents an interest in the same portfolio of investments of the Fund and has identical rights (based on relative net asset values) to assets and liquidation proceeds. Share classes can bear different rates of class-specific fees and expenses such as transfer agent and distribution fees. Differences in class-specific fees and expenses will result in differences in net investment income and, therefore, the payment of different dividends from net investment income earned by each class. The Amended and Restated Declaration of Trust of the Fund gives the Board the flexibility to specify either per-share voting or dollar-weighted voting when submitting matters for shareholder approval. Under per-share voting, each share of a class of the Fund is entitled to one vote. Under dollar-weighted voting, a shareholder's voting power is determined not by the number of shares owned, but by the dollar value of the shares on the record date. Each share class has exclusive voting rights with respect to matters affecting only that class, including with respect to the distribution plan for that class. There is no distribution plan for Class Y shares. The Fund's financial statements have been prepared in conformity with U.S. generally accepted accounting principles that require the management of the Fund to, among other things, make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of income, expenses and gains and losses on investments during the reporting period. Actual results could differ from those estimates. The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements: A. Security Valuation The net asset value of the Fund is computed once daily, on each day the New York Stock Exchange (NYSE) is open, as of the close of regular trading on the NYSE. 34 Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 Fixed income securities are valued by using prices supplied by independent pricing services, which consider such factors as market prices, market events, quotations from one or more brokers, Treasury spreads, yields, maturities and ratings, or may use a pricing matrix or other fair value methods or techniques to provide an estimated value of the security or instrument. A pricing matrix is a means of valuing a debt security on the basis of current market prices for other debt securities, historical trading patterns in the market for fixed income securities and/or other factors. Valuations may be supplemented by dealers and other sources, as required. Non-U.S. debt securities that are listed on an exchange will be valued at the bid price obtained from an independent third party pricing service. Event-linked bonds or catastrophe bonds are valued at the bid price obtained from an independent third party pricing service. Other insurance linked securities (including sidecars, collateralized reinsurance and industry loss warranties) may be valued at the bid price obtained from an independent pricing service, or through a third party using a pricing matrix, insurance industry valuation models, or other fair value methods or techniques to provide an estimated value of the instrument. Foreign securities are valued in U.S. dollars based on foreign currency exchange rate quotations supplied by a third party pricing service. Trading in non-U.S. equity securities is substantially completed each day at various times prior to the close of the NYSE. The values of such securities used in computing the net asset value of the Fund's shares are determined as of such times. The fund may use a fair value model developed by an independent pricing service to value non-U.S. equity securities Equity securities that have traded on an exchange are valued by using the last sale price on the principal exchange where they are traded. Equity securities that have not traded on the date of valuation, or securities for which sale prices are not available, generally are valued using the mean between the last bid and asked prices or, if both last bid and asked prices are not available, at the last quoted bid price. Last sale and bid and asked prices are provided by independent third party pricing services. In the case of equity securities not traded on an exchange, prices are typically determined by independent third party pricing services using a variety of techniques and methods. Swap contracts, including interest rate swaps, caps and floors (other than centrally cleared swap contracts) are valued at the dealer quotations obtained from reputable International Swap Dealer association members. Centrally cleared swaps are valued at the daily settlement price provided by the central clearing counterparty. Futures contracts are generally valued at the closing settlement price established by the exchange on which they are traded. Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 35 Options contracts are generally valued at the mean between the last bid and ask prices on the principal exchange where they are traded. Over-the-counter ("OTC") options and options on swaps ("swaptions") are valued using prices supplied by independent pricing services, which consider such factors as market prices, market events, quotations from one or more brokers, Treasury spreads, yields, maturities and ratings, or may use a pricing matrix or other fair value methods or techniques to provide an estimated value of the security or instrument. Forward foreign currency exchange contracts are valued daily using the foreign exchange rate or, for longer term forward contract positions, the spot currency rate, in each case provided by a third party pricing service. Contracts whose forward settlement date falls between two quoted days are valued by interpolation. Securities for which independent pricing services are unable to supply prices or for which market prices and/or quotations are not readily available or are considered to be unreliable are valued by a fair valuation team comprised of certain personnel of Pioneer Investment Management, Inc. (PIM), the Fund's investment adviser, pursuant to procedures adopted by the Fund's Board of Trustees. PIM's fair valuation team uses fair value methods approved by the Valuation Committee of the Board of Trustees. PIM's fair valuation team is responsible for monitoring developments that may impact fair valued securities and for discussing and assessing fair values on an ongoing basis, and at least quarterly, with the Valuation Committee of the Board of Trustees. Inputs used when applying fair value methods to value a security may include credit ratings, the financial condition of the company, current market conditions and comparable securities. The Fund may use fair value methods if it is determined that a significant event has occurred after the close of the exchange or market on which the security trades and prior to the determination of the Fund's net asset value. Examples of a significant event might include political or economic news, corporate restructurings, natural disasters, terrorist activity or trading halts. Thus, the valuation of the Fund's securities may differ significantly from exchange prices and such differences could be material. At February 29, 2016, there were no securities valued using fair value methods (other than securities valued using prices supplied by independent pricing services, broker-dealers or using a third party insurance industry pricing model). B. Investment Income & Transactions Principal amounts of mortgage-backed securities are adjusted for monthly paydowns. Premiums and discounts related to certain mortgage-backed securities are amortized or accreted in proportion to the monthly 32 Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 paydowns. All discounts/premiums on purchase prices of debt securities are accreted/amortized for financial reporting purposes over the life of the respective securities, and such accretion/amortization is included in interest income. Dividend income is recorded on the ex-dividend date except that certain dividends from foreign securities where the ex-dividend date may have passed are recorded as soon as the Fund becomes aware of the ex-dividend data in the exercise of reasonable diligence. Interest income is recorded on the accrual basis. Security transactions are recorded as of trade date. Gains and losses on sales of investments are calculated on the identified cost method for both financial reporting and federal income tax purposes. C. Foreign Currency Translation The books and records of the Fund are maintained in U.S. dollars. Amounts denominated in foreign currencies are translated into U.S. dollars using current exchange rates. Net realized gains and losses on foreign currency transactions, if any, represent, among other things, the net realized gains and losses on foreign currency contracts, disposition of foreign currencies and the difference between the amount of income accrued and the U.S. dollars actually received. Further, the effects of changes in foreign currency exchange rates on investments are not segregated in the statement of operations from the effects of changes in the market price of those securities but are included with the net realized and unrealized gain or loss on investments. D. Futures Contracts The Fund may enter into futures transactions in order to attempt to hedge against changes in interest rates, securities prices and currency exchange rates or to seek to increase total return. Futures contracts are types of derivatives. All futures contracts entered into by the Fund are traded on a futures exchange. Upon entering into a futures contract, the Fund is required to deposit with a broker an amount of cash or securities equal to the minimum "initial margin" requirements of the associated futures exchange. The amount of cash deposited with the broker as collateral at February 29, 2016 was $211,011 and is recorded within "Restricted Cash" on the Statement of Assets and Liabilities. Subsequent payments for futures contracts ("variation margin") are paid or received by the Fund, depending on the daily fluctuation in the value of the contracts, and are recorded by the Fund as unrealized appreciation or depreciation. When the contract is closed, the Fund realizes a gain or loss equal to the difference between the opening and closing value of the contract as well as any fluctuation in foreign currency exchange rates Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 37 where applicable. The use of futures contracts involves, to varying degrees, elements of market, interest rate, currency exchange rate and counterparty risks, which may exceed the amount recognized by the Fund. Changes in value of the contracts may not directly correlate to the changes in value of the underlying securities. The average value of contracts open during the six months ended February 29, 2016 was $(3,113,651). At February 29, 2016, open futures contracts were as follows: ------------------------------------------------------------------------------------- Number of Contracts Long/ Settlement Unrealized Type Counterparty (Short) Month/Year Value Appreciation ------------------------------------------------------------------------------------- U.S. 10 Year Note Citibank NA (8) 6/16 $(1,044,125) $1,375 U.S. Ultra Bond Citibank NA (9) 6/16 (1,558,406) 3,375 ------------------------------------------------------------------------------------- Total $(2,602,531) $4,750 ===================================================================================== E. Forward Foreign Currency Contracts The Fund may enter into forward foreign currency contracts (contracts) for the purchase or sale of a specific foreign currency at a fixed price on a future date. All contracts are marked to market daily at the applicable exchange rates, and any resulting unrealized appreciation or depreciation is recorded in the Fund's financial statements. The Fund records realized gains and losses at the time a contract is offset by entry into a closing transaction or extinguished by delivery of the currency. Risks may arise upon entering into these contracts from the potential inability of counterparties to meet the terms of the contract and from unanticipated movements in the value of foreign currencies relative to the U.S. dollar (see Note 5). F. Federal Income Taxes It is the Fund's policy to comply with the requirements of the Internal Revenue Code applicable to regulated investment companies and to distribute all of its net taxable income and net realized capital gains, if any, to its shareowners. Therefore, no federal income tax provision is required. As of August 31, 2015, the Fund did not accrue any interest or penalties with respect to uncertain tax positions, which, if applicable, would be recorded as an income tax expense in the Statement of Operations. Tax returns filed within the prior three years remain subject to examination by federal and state tax authorities. The amount and character of income and capital gain distributions to shareowners are determined in accordance with federal income tax rules, which may differ from U.S. generally accepted accounting principles. Distributions in excess of net investment income or net realized gains are temporary overdistributions for financial statement purposes resulting from differences in the recognition or classification of income or distributions for 38 Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 financial statement and tax purposes. Capital accounts within the financial statements are adjusted for permanent book/tax differences to reflect tax character, but are not adjusted for temporary differences. The tax character of current year distributions payable will be determined at the end of the current taxable year. The tax character of distributions paid during the fiscal year ended August 31, 2015 was as follows: --------------------------------------------------------------------------- 2015 --------------------------------------------------------------------------- Distributions paid from: Ordinary income $820,537 --------------------------------------------------------------------------- Total $820,537 =========================================================================== The following shows the components of distributable earnings (losses) on a federal income tax basis at August 31, 2015: --------------------------------------------------------------------------- 2015 --------------------------------------------------------------------------- Distributable earnings: Undistributed ordinary income $ 1,167,384 Capital loss carryforward (1,279,630) Unrealized depreciation (535,858) --------------------------------------------------------------------------- Total $ (648,104) =========================================================================== The difference between book-basis and tax-basis net unrealized depreciation is attributable to the tax adjustments relating to credit default swaps and the mark to market of forwards, swaps, options and future contracts. G. Fund Shares The Fund records sales and repurchases of its shares as of trade date. Pioneer Funds Distributor, Inc. (PFD), the principal underwriter for the Fund and a wholly owned indirect subsidiary of UniCredit S.p.A. (UniCredit), earned $290 in underwriting commissions on the sale of Class A shares during the six months ended February 29, 2016. H. Class Allocations Income, common expenses and realized and unrealized gains and losses are calculated at the Fund level and allocated daily to each class of shares based on its respective percentage of adjusted net assets at the beginning of the day. Distribution fees are calculated based on the average daily net asset value attributable to Class A and Class C shares of the Fund, respectively (see Note 4). Class Y shares do not pay distribution fees. All expenses and fees paid to the Fund's transfer agent, for its services are allocated among the classes of shares based on the number of accounts in each class and the ratable allocation of related out-of-pocket expenses (see Note 3). Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 39 Distributions to shareowners are recorded as of the ex-dividend date. Distributions paid by the Fund with respect to each class of shares are calculated in the same manner and at the same time, except that net investment income dividends to Class A, Class C and Class Y shares can reflect different transfer agent and distribution expense rates. I. Risks Investing in foreign and/or emerging markets securities involves risks relating to interest rates, currency exchange rates and economic and political conditions. At times, the Fund's investments may represent industries or industry sectors that are interrelated or have common risks, making the Fund more susceptible to any economic, political, or regulatory developments or other risks affecting those industries and sectors. The Fund's prospectus contains unaudited information regarding the Fund's principal risks. Please refer to that document when considering the Fund's principal risks. J. Insurance Linked Securities (ILS) Event-linked bonds are floating rate debt obligations for which the return of principal and the payment of interest are contingent on the non-occurrence of a pre-defined "trigger" event, such as a hurricane or an earthquake of a specific magnitude. The trigger event's magnitude may be based on losses to a company or industry, industry indexes or readings of scientific instruments, or may be based on specified actual losses. If a trigger event, as defined within the terms of an event-linked bond occurs, the Fund may lose a portion or all of its accrued interest and/or principal invested in such event-linked bond. The Fund is entitled to receive principal and interest payments so long as no trigger event occurs of the description and magnitude specified by the instrument. In addition to the specified trigger events, event-linked bonds may expose the Fund to other risks, including but not limited to issuer (credit) default, adverse regulatory or jurisdictional interpretations and adverse tax consequences. The Fund's investments in ILS may include special purpose vehicles ("SPVs") or similar instruments structured to comprise a portion of a reinsurer's catastrophe-oriented business, known as quota share instruments (sometimes referred to as reinsurance sidecars), or to provide reinsurance relating to specific risks to insurance or reinsurance companies through a collateralized instrument, known as collateralized reinsurance. Structured reinsurance investments also may include industry loss warranties ("ILWs"), are subject to the same risks as event-linked bonds. In addition, because quota share instruments represent an interest in a basket of underlying reinsurance contracts, the Fund has limited transparency into the individual underlying contracts and therefore must rely upon the risk assessment and sound underwriting practices of the issuer. Accordingly, it may be more difficult for 40 Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 PIM to fully evaluate the underlying risk profile of the Fund's investment in quota share instruments and therefore place the Fund's assets at greater risk of loss than if PIM had more complete information. Quota share instruments and other structured reinsurance instruments generally will be considered illiquid securities by the Fund. These securities may be difficult to purchase, sell or unwind. Illiquid securities also may be difficult to value. If the Fund is forced to sell an illiquid asset, the Fund may be forced to sell at a loss. K. Credit Default Swaps A credit default swap is a contract between a buyer of protection and a seller of protection against a pre-defined credit event. The Fund may sell or buy credit default swap contracts to seek to increase the Fund's income, or to attempt to hedge the risk of default on Fund securities. A credit default swap index is used to hedge risk or take a position on a basket of credit entities or indices. As a seller of protection, the Fund would be required to pay the notional (or other agreed-upon) value of the referenced debt obligation to the counterparty in the event of a default by a U.S. or foreign corporate issuer of a debt obligation, which would likely result in a loss to the Fund. In return, the Fund would receive from the counterparty a periodic stream of payments during the term of the contract provided that no event of default occurred. The maximum exposure of loss to the seller would be the notional value of the credit default swaps outstanding. If no default occurs, the Fund would keep the stream of payments and would have no payment obligation. The Fund may also buy credit default swap contracts in order to hedge against the risk of default of debt securities, in which case the Fund would function as the counterparty referenced above. When the Fund enters into a credit default swap contract, the protection buyer makes an up front payment to the protection seller in exchange for the rights to receive a contingent payment. An up front payment made by the Fund, as the protection buyer, is recorded as an asset in the Statement of Assets and Liabilities. Periodic payments received or paid by the Fund are recorded as realized gains or losses in the Statement of Operations. Credit default swap contracts are marked-to-market daily using valuations supplied by independent sources and the change in value, if any, is recorded as unrealized appreciation or depreciation in the Statement of Assets and Liabilities. Payments received or made as a result of a credit event or upon termination of the contract are recognized, net of the appropriate amount of the upfront payment, as realized gains or losses in the Statement of Operations. Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 41 Credit default swap contracts involving the sale of protection may involve greater risks than if the Fund had invested in the referenced debt instrument directly. Credit default swap contracts are subject to general market risk, liquidity risk, counterparty risk and credit risk. If the Fund is a protection buyer and no credit event occurs, it will lose its investment. If the Fund is a protection seller and a credit event occurs, the value of the referenced debt instrument received by the Fund, together with the periodic payments received, may be less than the amount the Fund pays to the protection buyer, resulting in a loss to the Fund. Certain swap contracts that are cleared through a central clearinghouse are referred to as centrally cleared swaps. All payments made or received by the Fund are pursuant to a centrally cleared swap contract with the central clearing party rather than the original counterparty. Upon entering into a centrally cleared swap contract, the Fund is required to make an initial margin deposit, either in cash or in securities. The daily change in value on open centrally cleared contracts is recorded as variation margin on centrally cleared swaps on the Statement of Assets and Liabilities. The amount of cash deposited with a broker as collateral at February 29, 2016 was $291,157 and is recorded within "Restricted Cash" on the Statement of Assets and Liabilities. Open credit default swap contracts at February 29, 2016 are listed in the Schedule of Investments. The average value of credit default swap contracts open during the six months ended February 29, 2016 was $(2,459,622). L. Interest Rate Swap Contracts The Fund may enter into interest rate swaps to attempt to hedge against interest rate fluctuations or to enhance its income. Pursuant to the interest rate swap agreement, the Fund negotiates with a counterparty to exchange a periodic stream of payments based on a benchmark interest rate. One cash flow stream will typically be a floating rate payment based upon the specified floating benchmark interest rate while the other is typically a fixed interest rate. Payment flows are usually netted against each other, with the difference being paid by one party to the other on a monthly basis. Periodic payments received or paid by the Fund are recorded as realized gains or losses in the Statement of Operations. Interest rate swap contracts are marked-to-market daily using valuations supplied by independent sources and the change in value, if any, is recorded as unrealized appreciation or depreciation in the Statement of Assets and Liabilities. Interest rate swap contracts are subject to counterparty risk and movements in interest rates. 42 Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 Open interest rate swap contracts at February 29, 2016 are listed in the Schedule of Investments. The average value of interest swap contracts open during the six months ended February 29, 2016 was $(41,160). M. Total Return Swap Contracts The Fund may enter into a total return swap to attempt to manage and/or gain exposure to a security or market. Pursuant to a total return swap agreement, the Fund negotiates with a counterparty to exchange a periodic stream of payments. One party makes payments based on the total return of a reference asset (such as a security or a basket of securities or securities index), and in return receives fixed or floating rate interest payments. The total return of the reference asset typically includes appreciation or depreciation on the reference asset, plus any interest or dividend payments. To the extent that the total return of the reference asset exceeds or falls short of the offsetting interest rate obligation, the Fund will receive a payment from or make a payment to the counterparty. Total return swap contracts are marked-to-market daily using valuations supplied by independent sources and the change in value, if any, is recorded as unrealized appreciation or depreciation in the Statement of Assets and Liabilities. Payments received or made are recorded as realized gains or losses in the Statement of Operations. Total return swap contracts are subject to counterparty risk and unanticipated movements in value of exchange rates, interest rates, securities or the index. Open interest rate swap contracts at February 29, 2016 are listed in the Schedule of Investments. The average value of swap contracts open during the six months ended February 29, 2016 was $(263,849). N. Credit Default Swaption Writing The Fund may write put and covered call swaptions on portfolio securities in order to attempt to hedge against changes in the value of portfolio securities or to seek to increase total return. When a swaption is written, the Fund receives a premium and becomes obligated to purchase or sell the underlying security at a fixed price upon the exercise of the swaption. When the Fund writes a swaption, an amount equal to the premium received by the Fund is recorded as a liability and is subsequently adjusted to the current value of the swaption written. Premiums received from writing swaptions that expire unexercised are treated by the Fund on the expiration date as realized gains from investments. The difference between the premium and the amount paid on effecting a closing purchase transaction, including brokerage commissions, is also treated as a realized gain or, if the premium is less than the amount paid for the closing purchase transaction, as a realized loss. If a call swaption is exercised, the premium is added to the proceeds from the sale Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 43 of the underlying security in determining whether the Fund has realized a gain or loss. The Fund as writer of a swaption bears the market risk of an unfavorable change in the price of the security underlying the written swaption. The Fund had no outstanding written credit default swaption contracts at February 29, 2016. The average value of written swaption contracts open during the six months ended February 29, 2016 was $(14,581). Transactions in written swaptions for the six months ended February 29, 2016 are summarized as follows: --------------------------------------------------------------------------- Number of Premiums Contracts Received/Paid --------------------------------------------------------------------------- Options outstanding at beginning of period -- $ -- Options opened (9,466,000) (76,451) Options exercised -- -- Options closed -- -- Options expired 9,466,000 76,451 --------------------------------------------------------------------------- Options outstanding at end of period -- $ -- =========================================================================== O. Credit Default Swaption Purchased The Fund may purchase put and call swaptions in order to attempt to hedge against changes in the value of portfolio securities or to seek to increase total return. Purchased call and put swaptions entitle the Fund to buy and sell a specified number of shares or units of a particular security, currency or index at a specified price at a specific date or within a specific period of time. Upon the purchase of a call or put swaption, the premium paid by the Fund is included in the Statement of Assets and Liabilities as an investment. All premiums are marked-to-market daily, and any unrealized gains or losses are recorded in the Fund's financial statements. As the purchaser of an index swaption, the Fund has the right to receive a cash payment equal to any depreciation in the value of the index below the strike price of the swaption (in the case of a put) or equal to any appreciation in the value of the index over the strike price of the swaption (in the case of a call) as of the valuation date of the swaption. Premiums paid for purchased calls and put swaptions which have expired are treated as realized losses on investments in the Statement of Operations. Upon the exercise or closing of a purchased put swaption, the premium is offset against the proceeds on the sale of the underlying security or financial instrument in order to determine the realized gain or loss on investments. Upon the exercise or closing of a purchased call swaption, the premium is added to the cost of the security or financial instrument. The risk associated with purchasing swaptions is limited to the 44 Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 premium originally paid. The average value of contracts open during the six months ended February 29, 2016 was $12,778. There were no outstanding purchased credit default swaptions open at February 29, 2016. P. Option Writing The Fund may write put and covered call options to seek to increase total return. When an option is written, the Fund receives a premium and becomes obligated to purchase or sell the underlying security at a fixed price, upon the exercise of the option. When the Fund writes an option, an amount equal to the premium received by the Fund is recorded as a liability and is subsequently adjusted to the current value of the option written. Premiums received from writing options that expire unexercised are treated by the Fund on the expiration date as realized gains from investments. The difference between the premium and the amount paid on effecting a closing purchase transaction, including brokerage commissions, is also treated as a realized gain, or, if the premium is less than the amount paid for the closing purchase transaction, as a realized loss. If a call option is exercised, the premium is added to the proceeds from the sale of the underlying security in determining whether the Fund has realized a gain or loss. The Fund as writer of an option bears the market risk of an unfavorable change in the price of the security underlying the written option. The average value of written options contracts open during the six months ended February 29, 2016 was ($305,884). Written call and put option contracts outstanding at period end are listed at the end of the Fund's schedule of investments. The Fund held four written put option contracts that were open at February 29, 2016. If the put options were exercised at February 29, 2016, the maximum amount the Fund would have been required to pay was $498,381. --------------------------------------------------------------------------- Number of Premiums Contracts Received --------------------------------------------------------------------------- Options outstanding at beginning of period (202) $(249,436) Options opened (618) (740,925) Options exercised 410 491,980 Options closed -- -- Options expired -- -- --------------------------------------------------------------------------- Options outstanding at end of period (410) $(498,381) =========================================================================== Q. Options Purchased The Fund may purchase put and call options in order to seek to increase total return. Purchased call and put options entitle the Fund to buy and sell a specified number of shares or units of a particular security, currency or index at a specified price at a specific date or within a specific period of time. Upon Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 45 the purchase of a call or put option, the premium paid by the Fund is included in the Statement of Assets and Liabilities as an investment. All premiums are marked-to-market daily, and any unrealized appreciation or depreciation are recorded in the Fund's financial statements. As the purchaser of an index option, the Fund has the right to receive a cash payment equal to any depreciation in the value of the index below the strike price of the option (in the case of a put) or equal to any appreciation in the value of the index over the strike price of the option (in the case of a call) as of the valuation date of the option. Premiums paid for purchased calls and put options which have expired are treated as realized losses on investments in the Statement of Operations. Upon the exercise or closing of a purchased put option, the premium is offset against the proceeds on the sale of the underlying security or financial instrument in order to determine the realized gain or loss on investments. Upon the exercise or closing of a purchased call option, the premium is added to the cost of the security or financial instrument. The risk associated with purchasing options is limited to the premium originally paid. The average value of purchased options contracts open during the six months ended February 29, 2016 was $404,341. Purchased option contracts outstanding at period end are listed within the Fund's schedule of investments. R. Repurchase Agreements Repurchase agreements are arrangements under which the Fund purchases securities from a broker-dealer or a bank, called the counterparty, upon the agreement of the counterparty to repurchase the securities from the Fund at a later date, and at a specific price, which is typically higher than the purchase price paid by the Fund. The securities purchased serve as the Fund's collateral for the obligation of the counterparty to repurchase the securities. The value of the collateral, including accrued interest, is required to be equal to or in excess of the repurchase price. The collateral for all repurchase agreements is held in safekeeping in the customer-only account of the Fund's custodian or a subcustodian of the Fund. The Fund's investment adviser, PIM is responsible for determining that the value of the collateral remains at least equal to the repurchase price. In the event of a default by the counterparty, the Fund is entitled to sell the securities, but the Fund may not be able to sell them for the price at which they were purchased, thus causing a loss to the Fund. Additionally, if the counterparty becomes insolvent, there is some risk that the Fund will not have a right to the securities, or the immediate right to sell the securities. 2. Management Agreement PIM, a wholly owned indirect subsidiary of UniCredit, manages the Fund's portfolio. Management fees are calculated daily at an annual rate of 1.15% of the average daily net assets of the Fund up to $1 billion and 1.05% of the 46 Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 Fund's average daily net assets over $1 billion. For the six months ended February 29, 2016, the management fee was equivalent to 1.15% of the Fund's average daily net assets. PIM has contractually agreed to limit ordinary operating expenses (ordinary operating expenses means all fund expenses other than extraordinary expenses, such as litigation, taxes, brokerage commissions and acquired fund fees and expenses) to the extent required to reduce Fund expenses to 1.70%, 2.45% and 1.45% of the average daily net assets attributable to Class A, Class C and Class Y shares, respectively. These expense limitations are in effect through January 1, 2017. Fees waived and expenses reimbursed during the six months ended February 29, 2016 are reflected on the Statement of Operations. Fees and expenses of other investment companies in which the Fund may invest are not included in the expense limitations noted above. There can be no assurance that PIM will extend the expense limitation agreement for a class of shares beyond the date referred to above. In addition, under the management and administration agreements, certain other services and costs, including accounting, regulatory reporting and insurance premiums, are paid by the Fund as administrative reimbursements. Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $26,891 in management fees, administrative costs and certain other reimbursements payable to PIM at February 29, 2016. 3. Transfer Agent Prior to November 2, 2015, Pioneer Investment Management Shareholder Services, Inc. (PIMSS), a wholly owned indirect subsidiary of UniCredit, provided substantially all transfer agent and shareowner services to the Fund at negotiated rates. Effective November 2, 2015, Boston Financial Data Services serves as the transfer agent to the Fund at negotiated rates. In addition, the Fund reimbursed the transfer agent for out-of-pocket expenses incurred by the transfer agent related to shareholder communications activities such as proxy and statement mailings, outgoing phone calls and omnibus relationship contracts. For the six months ended February 29, 2016, such out-of-pocket expenses by class of shares were as follows: -------------------------------------------------------------------------------- Shareholder Communications: -------------------------------------------------------------------------------- Class A $1,527 Class C 581 Class Y 3,262 -------------------------------------------------------------------------------- Total $5,370 ================================================================================ Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 47 Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $1,011 in transfer agent fees and out-of-pocket reimbursements payable to the transfer agent at February 29, 2016. 4. Distribution Plan The Fund has adopted a Distribution Plan pursuant to Rule 12b-1 of the Investment Company Act of 1940 with respect to its Class A and Class C shares. Pursuant to the Plan, the Fund pays PFD 0.25% of the average daily net assets attributable to Class A shares as compensation for personal services and/or account maintenance services or distribution services with regard to Class A shares. Pursuant to the Plan, the Fund also pays PFD 1.00% of the average daily net assets attributable to Class C shares. The fee for Class C shares consists of a 0.25% service fee and a 0.75% distribution fee paid as compensation for personal services and/or account maintenance services or distribution services with regard to Class C shares. Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $1,206 in distribution fees payable to PFD at February 29, 2016. In addition, redemptions of each class of shares (except Class Y shares) may be subject to a contingent deferred sales charge (CDSC). A CDSC of 1.00% may be imposed on redemptions of certain net asset value purchases of Class A shares within 12 months of purchase. Redemptions of Class C shares within 12 months of purchase are subject to a CDSC of 1.00%, based on the lower of cost or market value of shares being redeemed. Shares purchased as part of an exchange remain subject to any CDSC that applied to the original purchase of those shares. There is no CDSC for Class Y. Proceeds from the CDSCs are paid to PFD. For the six months ended February 29, 2016, CDSC's in the amount of $1,585 were paid to PFD. 5. Forward Foreign Currency Contracts During the six months ended February 29, 2016, the Fund had entered into various forward foreign currency contracts that obligate the Fund to deliver or take delivery of currencies at specified future maturity dates. Alternatively, prior to the settlement date of a forward foreign currency contract, the Fund may close out such contract by entering into an offsetting contract. The average value of forward foreign currency contracts open during the six months ended February 29, 2016 was $(2,867,012). 48 Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 ------------------------------------------------------------------------------------------------------------ In Currency Currency Exchange Settlement Unrealized Sold Deliver Purchased for Counterparty Date Appreciation ------------------------------------------------------------------------------------------------------------ EUR (Euro) (115,106) USD 129,589 Citibank NA 3/16/16 $ 4,186 EUR (Euro) (553,631) USD 608,593 JP Morgan 3/16/16 5,438 Chase Bank NA KRW (South (672,880,611) USD 556,284 JP Morgan 4/21/16 14,051 Korean Won) Chase Bank NA NZD (New (284,438) AUD 263,735 JPMorgan 5/23/16 1,089 Zealand Dollar) (Australian Chase Bank NA Dollar) JPY (Japanese (34,307,263) USD 306,384 JPMorgan 5/25/16 1,437 Yen) Chase Bank NA AUD (Australian (258,794) USD 186,402 JPMorgan 5/25/16 2,383 Dollar) Chase Bank NA ZAR (South (1,887,323) USD 121,934 JPMorgan 5/25/16 4,916 African Rand) Chase Bank NA HUF (Hungarian (79,619,344) USD 285,245 JPMorgan 5/25/16 5,706 Forint) Chase Bank NA NZD (New (568,084) USD 377,258 JPMorgan 5/25/16 4,898 Zealand Dollar) Chase Bank NA EUR (Euro) (255,707) USD 282,703 JPMorgan 5/25/16 3,485 Chase Bank NA ------------------------------------------------------------------------------------------------------------ Total $ 47,589 ============================================================================================================ ------------------------------------------------------------------------------------------------------------ In Currency Currency Exchange Settlement Unrealized Sold Deliver Purchased for Counterparty Date Depreciation ------------------------------------------------------------------------------------------------------------ USD (550,493) EUR (Euro) 487,592 Goldman Sachs 3/16/16 $ (19,285) International USD (428,672) EUR (Euro) 390,032 Citibank NA 3/16/16 (3,751) USD (762,529) EUR (Euro) 693,770 JP Morgan 3/16/16 (6,699) Chase Bank NA USD (298,413) INR (Indian 20,525,000 Goldman Sachs 4/21/16 (583) Rupee) International SGD (Singapore (388,867) USD 269,950 JP Morgan 4/25/16 (6,173) Dollar) Chase Bank NA CAD (Canadian (600,107) MXN 7,833,497 JPMorgan 4/25/16 (13,421) Dollar) (Mexican Peso) Chase Bank NA SEK (Swedish (3,943,441) USD 461,000 JPMorgan 4/25/16 (826) Krona) Chase Bank NA CZK (Czech (11,452,630) USD 458,541 Citibank NA 4/25/16 (2,764) Koruna) TWD (New (18,848,762) USD 565,944 JPMorgan 5/18/16 (474) Taiwan Dollar) Chase Bank NA CAD (245,262) USD 177,600 Citibank NA 5/25/16 (3,863) (Canadian Dollar) ------------------------------------------------------------------------------------------------------------ Total $ (57,839) ============================================================================================================ Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 49 6. Assets and Liabilities Offsetting The Fund has entered into an International Swaps and Derivatives Association, Inc. Master Agreement ("ISDA Master Agreement") or similar agreement with substantially all its derivative counterparties. An ISDA Master Agreement is a bilateral agreement between the Fund and a counterparty that governs the trading of certain OTC derivatives and typically contains, among other things, close-out and set-off provisions which apply upon the occurrence of event of a default and/or termination event as defined under the relevant ISDA Master Agreement. The ISDA Master Agreement may also give a party the right to terminate all transactions traded under such agreement if, among other things, there is deterioration in the credit quality of the other party. Upon an event of default or a termination of the ISDA Master Agreement, the non-defaulting party has the right to close out all transactions under such agreement and to net amounts owed under each transaction to determine one net amount payable by one party to the other. The right to close out and net payments across all transactions under the ISDA Master Agreement could result in a reduction of the Fund's credit risk to its counterparty equal to any amounts payable by the Fund under the applicable transactions, if any. However, the Fund's right to setoff may be restricted or prohibited by the bankruptcy or insolvency laws of the particular jurisdiction to which a specific ISDA counterparty is subject. The collateral requirements for derivatives transactions under an ISDA Master Agreement are governed by a credit support annex to the ISDA Master Agreement. Collateral requirements are generally determined at the close of business each day and are typically based on changes in market values for each transaction under an ISDA Master Agreement and netted into one amount for such agreement. Generally, the amount of collateral due from or to a counterparty is subject to threshold (a "minimum transfer amount") before a transfer is required, which may vary by counterparty. Collateral pledged for the benefit of the Fund and/or counterparty is held in segregated accounts by the Fund's custodian and cannot be sold, re-pledged, assigned or otherwise used while pledged. Cash that has been segregated to cover the Fund's collateral obligations, if any, will be reported separately in the Statement of Assets and Liabilities as "Restricted Cash". Securities pledged by the Fund as collateral, if any, are identified as such in the Schedule of Investments. 50 Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 Financial instruments subject to an enforceable master netting agreement such as an ISDA Master Agreement have been offset on the Statement of Assets and Liabilities. The following charts show gross assets and liabilities of the Fund as of February 29 2016. --------------------------------------------------------------------------------------------------- Derivative Assets Subject to Derivatives Non-Cash Cash Net Amount Master Netting Available Collateral Collateral of Derivative Counterparty Agreement for Offset Received (a) Received (a) Assets (b) --------------------------------------------------------------------------------------------------- Barclays Bank Plc $ 130,406 $ (11,842) $ -- $ -- $ 118,564 Citibank NA 4,186 (4,186) -- -- -- Goldman Sachs International 81,706 (81,706) -- -- -- JPMorgan Chase & Co. 67,041 (67,041) -- -- -- Morgan Stanley Capital Services LLC 35,145 (35,145) -- -- -- --------------------------------------------------------------------------------------------------- Total $ 318,484 $(199,920) $ -- $ -- $ 118,564 =================================================================================================== --------------------------------------------------------------------------------------------------- Derivative Liabilities Subject to Derivatives Non-Cash Cash Net Amount Master Netting Available Collateral Collateral of Derivative Counterparty Agreement for Offset Pledged (a) Pledged (a) Liabilities (c) --------------------------------------------------------------------------------------------------- Barclays Bank Plc $ (11,842) $ 11,842 $ -- $ -- $ -- Citibank NA (10,378) 4,186 -- 6,192 -- Goldman Sachs International (665,928) 81,706 584,222 -- -- JPMorgan Chase & Co. (387,832) 67,041 320,791 -- -- Morgan Stanley Capital Services LLC (56,990) 35,145 -- -- (21,845) --------------------------------------------------------------------------------------------------- Total $(1,132,970) $ 199,920 $ 905,013 $ 6,192 $ (21,845) =================================================================================================== (a) The amount presented here may be less than the total amount of collateral received/pledged as the net amount of derivative assets and liabilities cannot be less than $0. (b) Represents the net amount due from the counterparty in the event of default. (c) Represents the net amount payable to the counterparty in the event of default. 7. Additional Disclosures about Derivative Instruments and Hedging Activities: The Fund's use of derivatives subjects it to the following risks: Interest rate risk relates to the fluctuations in the value of interest-bearing securities due to changes in the prevailing levels of market interest rates. Credit risk relates to the ability of the issuer of a financial instrument to make further principal or interest payments on an obligation or commitment that it has to the Fund. Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 51 Foreign exchange rate risk relates to fluctuations in the value of an asset or liability due to changes in currency exchange rates. Equity risk relates to the fluctuations in the value of financial instruments as a result of changes in market prices (other than those arising from interest rate risk or foreign exchange risk), whether caused by factors specific to an individual investment, its issuer, or all factors affecting all instruments traded in a market or market segment. Commodity risk relates to the risk that the value of a commodity or commodity index will fluctuate based on increases or decreases in the commodities market and factors specific to a particular industry or commodity. The fair value of open derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) by risk exposure at February 29, 2016 was as follows: --------------------------------------------------------------------------------------------- Statement of Assets and Liabilities Foreign Interest Credit Exchange Equity Commodity Rate Risk Risk Rate Risk Risk Risk --------------------------------------------------------------------------------------------- Assets Unrealized appreciation of forward foreign currency contracts $ -- $ -- $ 47,589 $ -- $ -- Unrealized appreciation of futures contracts 4,750 -- -- -- -- --------------------------------------------------------------------------------------------- Total Value $ 4,750 $ -- $ 47,589 $ -- $ -- ============================================================================================= Liabilities Unrealized depreciation of forward foreign currency contracts $ -- $ -- $ (57,839) $ -- $ -- Net unrealized depreciation on swap contracts (632,184) 41,993 -- -- -- Written options -- -- -- (300,015) -- --------------------------------------------------------------------------------------------- Total Value $ (632,184) $ 41,993 $ (57,839) $ (300,015) $ -- ============================================================================================= 52 Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 The effect of derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) on the Statement of Operations by risk exposure at February 29, 2016 was as follows: ---------------------------------------------------------------------------------------- Statement of Operations Foreign Interest Credit Exchange Commodity Rate Risk Risk Rate Risk Equity Risk Risk ---------------------------------------------------------------------------------------- Net realized gain (loss) on Futures contracts $ (324,519) $ -- $ -- $ -- $ -- Written options -- 76,451 -- 372,214 -- Swap contracts -- (2,145,893) -- -- -- Forward foreign currency contracts* -- -- (62,968) -- -- ---------------------------------------------------------------------------------------- Total Value $ (324,519) $ (2,069,442) $ (62,968) $ 372,214 $ -- ======================================================================================== Change in net unrealized appreciation (depreciation) on Futures contracts $ 5,297 $ -- $ -- $ -- $ -- Written options -- -- -- 490,795 -- Swap contracts (612,410) 193,998 -- -- -- Forward foreign currency contracts* -- -- (31,138) -- -- ---------------------------------------------------------------------------------------- Total Value $ (607,113) $ 193,998 $ (31,138) $ 490,795 $ -- ======================================================================================== * Included in the amount shown on the Statement of Operations as foward foreign currency contracts and other assets and liabilities denominated in foreign currencies. Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 53 ADDITIONAL INFORMATION (unaudited) Pioneer Investment Management, Inc. (the "Adviser"), each fund's investment adviser, is currently an indirect, wholly owned subsidiary of UniCredit S.p.A. ("UniCredit"). On November 11, 2015, UniCredit announced that it signed a binding master agreement with Banco Santander and affiliates of Warburg Pincus and General Atlantic (the "Private Equity Firms") with respect to Pioneer Investments ("Pioneer") and Santander Asset Management ("SAM") (the "Transaction"). The Transaction, as previously announced by UniCredit, will establish a holding company, with the name Pioneer Investments, to be owned by UniCredit (50%) and the Private Equity Firms (50% between them). The holding company will control Pioneer's U.S. operations, including PIM. The holding company also will own 66.7% of Pioneer's and SAM's combined operations outside the U.S., while Banco Santander will own directly the remaining 33.3% stake. The closing of the Transaction is expected to happen in 2016, subject to certain regulatory and other approvals. Under the Investment Company Act of 1940, completion of the Transaction will cause each fund's current investment advisory agreement with PIM to terminate. Accordingly, each fund's Board of Trustees will be asked to approve a new investment advisory agreement. If approved by the Board, each fund's new investment advisory agreement will be submitted to the shareholders of the fund for their approval. 54 Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 Approval of Investment Advisory Agreement Pioneer Investment Management, Inc. (PIM) serves as the investment adviser to Pioneer Long/Short Opportunistic Credit Fund (the Fund) pursuant to an investment advisory agreement between PIM and the Fund. In order for PIM to remain the investment adviser of the Fund, the Trustees of the Fund must determine annually whether to renew the investment advisory agreement for the Fund. The contract review process began in January 2015 as the Trustees of the Fund agreed on, among other things, an overall approach and timeline for the process. Contract review materials were provided to the Trustees in March 2015 and July 2015. Supplemental contract review materials were provided to the Trustees in September 2015. In addition, the Trustees reviewed and discussed the Fund's performance at regularly scheduled meetings throughout the year, and took into account other information related to the Fund provided to the Trustees at regularly scheduled meetings, in connection with the review of the Fund's investment advisory agreement. In March 2015, the Trustees, among other things, discussed the memorandum provided by Fund counsel that summarized the legal standards and other considerations that are relevant to the Trustees in their deliberations regarding the renewal of the investment advisory agreement, and reviewed and discussed the qualifications of the investment management teams, as well as the level of investment by the Fund's portfolio managers in the Fund. In July 2015, the Trustees, among other things, reviewed the Fund's management fee and total expense ratios, the financial statements of PIM and its parent companies, the profitability analyses provided by PIM, and possible economies of scale. The Trustees also reviewed the profitability of the institutional business of PIM and PIM's affiliate, Pioneer Institutional Asset Management, Inc. (together with PIM, "Pioneer"), as compared to that of PIM's fund management business, and considered the differences between the fees and expenses of the Fund and the fees and expenses of Pioneer's institutional accounts, as well as the different services provided by PIM to the Fund and by Pioneer to the institutional accounts. The Trustees further considered contract review materials in September 2015. At a meeting held on September 15, 2015, based on their evaluation of the information provided by PIM and third parties, the Trustees of the Fund, including the Independent Trustees voting separately, unanimously approved the renewal of the investment advisory agreement for another year. In approving the renewal of the investment advisory agreement, the Trustees Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 55 considered various factors that they determined were relevant, including the factors described below. The Trustees did not identify any single factor as the controlling factor in determining to approve the renewal of the agreement. Nature, Extent and Quality of Services The Trustees considered the nature, extent and quality of the services that had been provided by PIM to the Fund, taking into account the investment objective and strategy of the Fund. The Trustees also reviewed PIM's investment approach for the Fund and its research process. The Trustees considered the resources of PIM and the personnel of PIM who provide investment management services to the Fund. They also reviewed the amount of non-Fund assets managed by the portfolio managers of the Fund. The Trustees considered the non-investment resources and personnel of PIM involved in PIM's services to the Fund, including PIM's compliance and legal resources and personnel. The Trustees noted the substantial attention and high priority given by PIM's senior management to the Pioneer fund complex. The Trustees considered that PIM supervises and monitors the performance of the Fund's service providers and provides the Fund with personnel (including Fund officers) and other resources that are necessary for the Fund's business management and operations. The Trustees also considered that, as administrator, PIM is responsible for the administration of the Fund's business and other affairs. The Trustees considered the fees paid to PIM for the provision of administration services. Based on these considerations, the Trustees concluded that the nature, extent and quality of services that had been provided by PIM to the Fund were satisfactory and consistent with the terms of the investment advisory agreement. Performance of the Fund In considering the Fund's performance, the Trustees regularly review and discuss throughout the year data prepared by PIM and information comparing the Fund's performance with the performance of its peer group of funds as classified by each of Morningstar, Inc. (Morningstar) and Lipper, and with the performance of the Fund's benchmark index. They also discuss the Fund's performance with PIM on a regular basis. The Trustees' regular reviews and discussions were factored into the Trustees' deliberations concerning the renewal of the advisory agreement. 56 Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 Management Fee and Expenses The Trustees considered information showing the fees and expenses of the Fund in comparison to the management fees and expense ratios of its peer group of funds as classified by Morningstar and also to the expense ratios of a peer group of funds selected on the basis of criteria determined by the Independent Trustees for this purpose using data provided by Strategic Insight Mutual Fund Research and Consulting, LLC (Strategic Insight), an independent third party. In all quintile rankings referred to below, first quintile is most favorable to the Fund's shareowners. The Trustees considered that the Fund's management fee for the most recent fiscal year was in the fifth quintile relative to the management fees paid by other funds in its Morningstar peer group for the comparable period. The Trustees also considered the breakpoint in the management fee schedule and the reduced fee rate above a certain asset level. The Trustees noted the investment management expertise and resources required to implement the Fund's complex investment strategy. The Trustees considered that the expense ratio of the Fund's Class A shares for the most recent fiscal year was in the fifth quintile relative to its Morningstar peer group and in the fifth quintile relative to its Strategic Insight peer group, in each case for the comparable period. The Trustees noted that PIM was waiving fees and/or reimbursing expenses in order to limit the ordinary operating expenses of the Fund. The Trustees noted the Fund's relatively small asset size compared to most of the other funds in its peer groups, and that the Fund has not been able to take advantage of the economies of scale afforded by greater asset size. The Trustees considered the impact of transfer agency, sub-transfer agency, and other non-management fee expenses on the expense ratios of the Fund. The Trustees noted that they separately review the Fund's transfer agency, sub-transfer agency and intermediary arrangements. The Trustees reviewed management fees charged by Pioneer to institutional and other clients, including publicly offered European funds sponsored by affiliates of Pioneer, unaffiliated U.S. registered investment companies (in a sub-advisory capacity), and unaffiliated foreign and domestic separate accounts. The Trustees also considered PIM's costs in providing services to the Fund and Pioneer's costs in providing services to the other clients and considered the differences in management fees and profit margins for Fund and non-Fund services. In evaluating the fees associated with Pioneer's client accounts, the Trustees took into account the respective demands, resources and complexity associated with the Fund and client accounts. The Trustees noted that, in some instances, the fee rates for those clients were lower than the management fee for the Fund and considered that, under the investment advisory agreement with the Fund, PIM Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 57 performs additional services for the Fund that it does not provide to those other clients or services that are broader in scope, including oversight of the Fund's other service providers and activities related to compliance and the extensive regulatory and tax regimes to which the Fund is subject. The Trustees also considered the different entrepreneurial risks associated with PIM's management of the Fund and Pioneer's management of the other client accounts. The Trustees concluded that the management fee payable by the Fund to PIM was reasonable in relation to the nature and quality of the services provided by PIM to the Fund. Profitability The Trustees considered information provided by PIM regarding the profitability of PIM with respect to the advisory services provided by PIM to the Fund, including the methodology used by PIM in allocating certain of its costs to the management of the Fund. The Trustees also considered PIM's profit margin in connection with the overall operation of the Fund. They further reviewed the financial results realized by PIM and its affiliates from non-fund businesses. The Trustees considered PIM's profit margins with respect to the Fund in comparison to the limited industry data available and noted that the profitability of any adviser was affected by numerous factors, including its organizational structure and method for allocating expenses. The Trustees concluded that PIM's profitability with respect to the management of the Fund was not unreasonable. Economies of Scale The Trustees considered PIM's views relating to economies of scale in connection with the Pioneer Funds as fund assets grow and the extent to which any such economies of scale are shared with funds and fund shareholders. The Trustees noted the breakpoint in the management fee schedule. The Trustees recognize that economies of scale are difficult to identify and quantify, and that, among other factors that may be relevant, are the following: fee levels, expense subsidization, investment by PIM in research and analytical capabilities and PIM's commitment and resource allocation to the Fund. The Trustees noted that profitability also may be an indicator of the availability of any economies of scale, although profitability may vary for other reasons including reductions in expenses. The Trustees concluded that economies of scale, if any, were being appropriately shared with the Funds. 58 Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 Other Benefits The Trustees considered the other benefits to PIM from its relationship with the Fund. The Trustees considered the character and amount of fees paid by the Fund, other than under the investment advisory agreement, for services provided by PIM and its affiliates. The Trustees further considered the revenues and profitability of PIM's businesses other than the fund business. Pioneer is the principal U.S. asset management business of Pioneer Global Asset Management, the worldwide asset management business of UniCredit Group, which manages over $150 billion in assets (including the Funds). Pioneer and the Funds receive reciprocal intangible benefits from the relationship, including mutual brand recognition and, for the Funds, direct and indirect access to the resources of a large global asset manager. The Trustees concluded that any such benefits received by Pioneer as a result of its relationship with the Funds were reasonable and their consideration of the advisory agreement between the Fund and PIM and the fees thereunder were unaffected by Pioneer's possible receipt of any such intangible benefits. Conclusion After consideration of the factors described above as well as other factors, the Trustees, including all of the Independent Trustees, concluded that the investment advisory agreement between PIM and the Fund, including the fees payable thereunder, was fair and reasonable and voted to approve the proposed renewal of the investment advisory agreement for the Fund. Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 59 Trustees, Officers and Service Providers Trustees Advisory Trustee Thomas J. Perna, Chairman Lorraine H. Monchak* David R. Bock Benjamin M. Friedman Officers Margaret B.W. Graham Lisa M. Jones, President and Chief Marguerite A. Piret Executive Officer Fred J. Ricciardi Mark E. Bradley, Treasurer and Kenneth J. Taubes Chief Financial Officer Christopher J. Kelley, Secretary and Chief Legal Officer Investment Adviser and Administrator Pioneer Investment Management, Inc. Custodian and Sub-Administrator Brown Brothers Harriman & Co. Principal Underwriter Pioneer Funds Distributor, Inc. Legal Counsel Morgan, Lewis & Bockius LLP Shareowner Services and Transfer Agent Boston Financial Data Services, Inc. Proxy Voting Policies and Procedures of the Fund are available without charge, upon request, by calling our toll free number (1-800-225-6292). Information regarding how the Fund voted proxies relating to portfolio securities during the most recent 12-month period ended June 30 is publicly available to shareowners at us.pioneerinvestments.com. This information is also available on the Securities and Exchange Commission's web site at www.sec.gov. * Ms. Monchak is a non-voting Advisory Trustee. 64 Pioneer Long/Short Opportunistic Credit Fund | Semiannual Report | 2/29/16 How to Contact Pioneer We are pleased to offer a variety of convenient ways for you to contact us for assistance or information. Call us for: -------------------------------------------------------------------------------- Account Information, including existing accounts, new accounts, prospectuses, applications and service forms 1-800-225-6292 FactFone(SM) for automated fund yields, prices, account information and transactions 1-800-225-4321 Retirement plans information 1-800-622-0176 Write to us: -------------------------------------------------------------------------------- Pioneer Funds P.O. Box 55014 Boston, Massachusetts 02205-5014 Our toll-free fax 1-800-225-4240 Our internet e-mail address ask.pioneer@pioneerinvestments.com (for general questions about Pioneer only) Visit our web site: us.pioneerinvestments.com This report must be preceded or accompanied by a prospectus. The Fund files a complete schedule of investments with the Securities and Exchange Commission for the first and third quarters for each fiscal year on Form N-Q. Shareholders may view the filed Form N-Q by visiting the Commission's web site at http://www.sec.gov. The filed form may also be viewed and copied at the Commission's Public Reference Room in Washington, DC. Information regarding the operations of the Public Reference Room may be obtained by calling 1-800-SEC-0330. [LOGO] PIONEER Investments(R) Pioneer Investment Management, Inc. 60 State Street Boston, MA 02109 us.pioneerinvestments.com Securities offered through Pioneer Funds Distributor, Inc. 60 State Street, Boston, MA 02109 Underwriter of Pioneer Mutual Funds, Member SIPC (C) 2016 Pioneer Investments 27687-02-0416 Pioneer Absolute Return Bond Fund -------------------------------------------------------------------------------- Semiannual Report | February 29, 2016 -------------------------------------------------------------------------------- Ticker Symbols: Class A ABRDX Class C ARCBX Class K ARBKX Class Y ARBYX [LOGO] PIONEER Investments(R) visit us: us.pioneerinvestments.com Table of Contents President's Letter 2 Portfolio Management Discussion 4 Portfolio Summary 10 Prices and Distributions 11 Performance Update 12 Comparing Ongoing Fund Expenses 16 Schedule of Investments 18 Financial Statements 27 Notes to Financial Statements 35 Approval of Investment Advisory Agreement 60 Trustees, Officers and Service Providers 65 Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 1 President's Letter Dear Shareowner, Over the past several years, many investors experienced positive returns across most major asset classes. However, 2015 was a tale of two markets, with favorable market conditions in the first half of the year, followed by an abrupt slowdown and increased volatility beginning in August. The global markets were challenged by significant economic cross-currents in different geographic regions and industrial sectors. While the U.S. economy gradually improved, growth slowed in China. Emerging markets struggled following a decline in commodity prices, especially oil. While lower energy prices are good for the consumer, there were ripple effects throughout the global economy. Against this backdrop, the Standard & Poor's 500 Index rose by just 1.4% in 2015, international equity markets were essentially flat, and emerging market equities fell sharply. Across U.S. fixed-income sectors, U.S. government and investment-grade corporate bonds were fairly flat for the year, while high-yield bonds, as measured by the Bank of America Merrill Lynch Master II High Yield Index, posted a -4.9% total return. Entering 2016, we see the U.S. economy growing modestly, against an overall global economic backdrop that remains fragile and points towards structurally lower growth. As always in a presidential election year, political rhetoric has the potential to impact U.S. sectors such as health care in 2016. Economies around the world in both developed and emerging markets are experiencing deep structural change. Geopolitical instability on many fronts, the rising risk of policy mistakes, and market liquidity issues all increase the possibility of sharp swings in asset values. In this environment, financial markets remain vulnerable to unusual levels of volatility. While divergences among regions and industries is an important theme, we are generally optimistic about the outlook for the U.S. economy, which we expect will see continued, positive growth led by a strengthened consumer. Throughout Pioneer's history, we have believed in the importance of active management. In periods of market volatility, we believe that the value of active management is even more compelling. Our experienced and tenured investment teams focus on identifying value across global markets using proprietary research, careful risk management, and a long-term perspective. Our ongoing goal is to produce compelling returns consistent with the stated objectives of our investment products, and with our shareowners' expectations. We believe our shareowners can benefit from the experience and tenure of our investment teams as well as the insights generated from our extensive research process. 2 Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 As always, and particularly during times of market uncertainty, we encourage you to work with your financial advisor to develop an overall investment plan that addresses both your short- and long-term goals, and to implement such a plan in a disciplined manner. We greatly appreciate the trust you have placed in us and look forward to continuing to serve you in the future. Sincerely, /s/ Lisa M. Jones Lisa M. Jones President and CEO Pioneer Investment Management USA Inc. February 29, 2016 Any information in this shareowner report regarding market or economic trends or the factors influencing the Fund's historical or future performance are statements of opinion as of the date of this report. These statements should not be relied upon for any other purposes. Past performance is no guarantee of future results, and there is no guarantee that market forecasts discussed will be realized. Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 3 Portfolio Management Discussion | 2/29/16 In the following interview, portfolio managers Tanguy Le Saout and Cosimo Marasciulo discuss the factors that influenced Pioneer Absolute Return Bond Fund's performance during the six-month period ended February 29, 2016, as well as their investment approach in managing the Fund. Mr. Le Saout, Head of European Fixed Income and a portfolio manager based in Pioneer's Dublin office, and Mr. Marasciulo, Head of Government Bonds and a portfolio manager at Pioneer, also based in Dublin, are responsible for the day-to-day management of the Fund. Q How did the Fund perform during the six-month period ended February 29, 2016? A Pioneer Absolute Return Bond Fund's Class A shares returned -2.85% at net asset value during the six-month period ended February 29, 2016, while the Fund's benchmark, the Bank of America Merrill Lynch (BofA ML) 3-Month U.S. Treasury Bill Index, returned 0.06%. During the same period, the average return of the 306 mutual funds in Lipper's Alternative Credit Focus Funds category was -3.45%, and the average return of the 537 mutual funds in Morningstar's Non-Traditional Bond Funds category was -2.94%. Q Can you provide an overview of the Fund's investment approach? A The big picture is that we aim to have the Fund's annualized return exceed that of three-month Treasury bills, while targeting portfolio volatility that is similar to that of T-bills as well. To achieve this, we seek to provide positive absolute Fund returns, regardless of market conditions. Obviously, if we are going to be successful in achieving our goals, the Fund's returns cannot be overly dependent on the price performance of one or more fixed-income categories. Therefore, in seeking positive Fund returns regardless of market conditions, we divide the portfolio into two distinct parts. The core of the Fund's portfolio invests in three-month Treasury bills. This part of the portfolio effectively aims to match the return of the BofA ML Index benchmark. For the remainder of the portfolio, we utilize an overlay approach based on investments in a wide variety of lowly correlated, highly diversified securities that we believe are sources of potential return for the Fund. Each of those investments is designed to provide the Fund with alpha, or excess return. (Alpha measures risk-adjusted performance, representing excess return relative to the return of the benchmark.) 4 Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 We implement the overlay approach mainly via investments in derivatives; however, in cases where derivatives cannot be used, the remainder of the portfolio's "alpha-geared" investments can be allocated into bonds, each of which is focused on a different segment of the fixed-income market. Importantly, each investment in the "alpha" sleeve of the Fund's portfolio seeks to benefit from both positive and negative market returns. This means the Fund takes positions in some asset categories within the broad bond market through long exposures, while also taking positions against other asset categories via short exposures. (Long/Short positioning involves taking long, or bought positions in fixed-income/equity securities in anticipation that they will increase in value, and taking short, or sold positions in fixed-income/equities in anticipation that they will decrease in value.) This, in our view, provides the Fund with an added level of diversification* across different asset classes when compared with investment vehicles in which asset allocation and security selection are more closely tied together. Importantly, we closely track the portfolio's risks assumed across all of the alpha-related strategies, and operate within an overall "risk budget" based on our objective of avoiding negative Fund returns over a 12-month period (full fiscal year). Q Can you discuss the investment strategies that had the biggest effects on the Fund's benchmark-relative performance during the six-month period ended February 29, 2016? A In addition to the core position in three-month Treasuries, the Fund had a number of different positions across the alpha portion of the portfolio during the period. The Fund's relative-value positions were the leading detractors from benchmark-relative returns over the six-month period. Notably, the Fund was short the 10-year Italian government bond and had corresponding long positions in 30-year Spanish and Italian bonds. We took that stance in view of the recent underperformance of longer-term bonds in those markets, and in anticipation that Spanish government bonds would outperform their Italian counterparts. However, heightened political uncertainty in Spain following December's inconclusive national election caused long Spanish bonds to underperform. The Fund's positioning with respect to U.S. interest rates was also a detractor from relative returns during the period. We shorted the five-year Treasury based on our view that the markets had become complacent about the likely pace of short-term rate hikes by the U.S. Federal Reserve (the Fed) * Diversification does not assure a profit nor protect against loss. Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 5 and the corresponding impact on yields farther out on the yield curve. We based the portfolio's positioning, in part, on our analysis of the Fed's "dot chart," which displays the sentiment of individual Federal Open Market Committee members as to the likely direction and extent of changes in the Federal funds rate. Unfortunately, a number of factors combined to undermine inflation expectations over the six-month period, resulting in a decline in Treasury rates. These included signs of softening U.S. economic growth, further weakness in oil prices, and China's currency devaluation in August 2015, just prior to the start of the six-month period. Positioning with regard to European interest rates was similar, as we shorted the 10-year German bund. This stance also detracted from the Fund's relative returns, due in part to interest-rate-lowering efforts by the European Central Bank that were more aggressive than expected. Finally, a position designed to benefit from any increase in inflation expectations in Europe and Japan detracted from the Fund's relative returns, given the continued slide in oil prices and lack of upward pressure on European wages. On the positive side, we anticipated that there would be elevated volatility in European bond markets, and took a portfolio position designed to benefit from a substantial move in long-term bond yields - in either direction - within the region. The trade worked out well for the Fund in early 2016, as European bond markets rallied and the curve flattened due to substantial yield decreases on long-term bonds. Another strategy that added value to the Fund's relative performance during the period was our attempt to take advantage of a divergence between Japanese and European interest rates. Specifically, while deposit rates in Europe were lower than in Japan, the reverse was true with respect to two-year bond yields. We took a portfolio position designed to benefit from those conditions, as market expectations regarding the relative steepness of the European and Japanese yield curves normalized. Q Please discuss the role of derivatives in implementing the Fund's investment approach during the six-month period ended February 29, 2016 A We implement virtually all of the Fund's strategies via derivatives, and so the Fund's performance will always be influenced by the use of such securities. For instance, when we want to short U.S. Treasuries in the portfolio, we will do so mainly by selling Treasury futures, or sometimes by buying "put" options. (A "put" option is a contractual agreement that gives 6 Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 the contract owner the right, but not the obligation, to sell a security at a pre-determined, fixed price for a certain period of time, regardless of the current market price of that security.) Similarly, with the portfolio's currency investments, we use forward contracts and options to gain the desired exposures. With respect to credit markets where there are no liquid futures contracts, we may use credit default swaps to manage the portfolio's exposures. In other situations, we utilize instruments such as interest-rate or inflation swaps to implement our investment views. Q What is your assessment of the current macroeconomic climate and the investment opportunities it may present? A Recently, we have adopted a more neutral portfolio stance with regard to global economic growth prospects as well as interest rates in comparison to prior months. We did this because, on the one hand, central banks overseas are continuing to signal the adoption of non-conventional measures such as negative interest rates, while simultaneously increasing their asset-purchase programs. On the other hand, however, while those policies may support bond valuations in the short-term, we believe there is little long-term value given the current level of global bond yields. We expect the European and U.S. economies to grow at a slow, but steady pace, and view the prospect of either economy falling back into recession as unlikely. Employment growth is strong, and we believe the persistent decline in oil prices will provide a boost to consumption that will become increasingly evident as we move through 2016. It is true that manufacturing sectors are experiencing some difficulties, but they account for a modest proportion of these economies. Still, we recognize that economic growth in a number of countries is struggling to regain traction due to a lack of structural reforms. In addition, there are fears over the impact of a stronger U.S. dollar on many emerging markets nations. Against this backdrop, we believe any Fed rate-hiking cycle will likely be slow and gradual, and that U.S. Treasury yields may remain range-bound at current levels for some time. However, we believe there is a significant story developing in Europe that could have major implications for investors. The political backdrop in Europe is arguably as problematic as it has been for many years. The list of concerns includes a migrant crisis that is putting enormous pressure on German Chancellor Merkel, and which could have serious consequences for European trade. In Italy, the "bad bank" situation lingers, meaning that the Italian economy will likely continue to stagnate. Spain, in effect, is without a government, the problems in Greece are nowhere near a resolution, and citizens in the U.K. will soon be facing a Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 7 referendum on exiting the common market altogether. Given the many sources of uncertainty, among other consequences, we believe peripheral European sovereign bonds may at some stage become vulnerable to substantial spread widening. (Credit spreads are commonly referred to as the differences in yields between Treasuries and other types of fixed-income securities with similar maturities.) We will continue to monitor those and other macroeconomic factors closely as we seek to inform our decisions regarding the various positions implemented within the alpha portion of the portfolio. Please refer to the Schedule of Investments on pages 18-26 for a full listing of Fund securities. All investments are subject to risk, including the possible loss of principal. In the past several years, financial markets have experienced increased volatility, depressed valuations, decreased liquidity, and heightened uncertainty. These conditions may continue, recur, worsen, or spread. Pioneer Absolute Return Bond invests in derivatives, such as options, futures, inverse floating-rate obligations, and swaps, among others, which can be illiquid, may disproportionately increase losses, and have a potentially large impact on the performance of the portfolio. The Fund may take short positions, which involves leverage of its assets and presents additional risks. The Fund may invest in credit default swaps, which may in some cases be illiquid, and they increase credit risk since the Fund has exposure to both the issuer of the referenced obligation and the counterparty to the credit default swap. The Fund employs leverage, which increases the volatility of investment returns and subjects the Fund to magnified losses. The Fund is subject to duration risk. Duration seeks to measure the price sensitivity of a fixed income security to interest rates. The longer a portfolio's duration, the more sensitive it will be to changes in interest rates. Investments in fixed-income securities involve interest rate, credit, inflation, and reinvestment risks. When interest rates rise, the prices of fixed-income securities in the Fund will generally fall. Conversely, when interest rates fall, the prices of fixed-income securities will generally rise. Investments in the Fund are subject to possible loss due to the financial failure of issuers of underlying securities and their inability to meet their debt obligations. 8 Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 Prepayment risk is the chance that an issuer may exercise its right to prepay its security, if falling interest rates prompt the issuer to do so. Forced to reinvest the unanticipated proceeds at lower interest rates, the Fund would experience a decline in income and lose the opportunity for additional price appreciation. Investments in high-yield or lower-rated securities are subject to greater-than-average price volatility, illiquidity and possibility of default. The securities issued by U.S. Government-sponsored entities (e.g., FNMA, Freddie Mac) are neither guaranteed nor issued by the U.S. Government. The portfolio may invest in mortgage-backed securities, which during times of fluctuating interest rates may increase or decrease more than other fixed-income securities. Mortgage-backed securities are also subject to pre-payments. The Fund may invest in subordinated securities, which may be disproportionately adversely affected by a default or even a perceived decline in creditworthiness of the issuer. Investing in foreign and/or emerging markets securities involves risks relating to interest rates, currency exchange rates, economic, and political conditions. The Fund may invest in event-linked bonds and other insurance-linked securities. The return of principal and the payment of interest on insurance-linked securities are contingent on the non-occurrence of a pre-defined "trigger" event, such as a hurricane or an earthquake of a specific magnitude. The Fund may invest in floating-rate loans; the value of collateral, if any, securing a floating-rate loan can decline or may be insufficient to meet the issuer's obligations or may be difficult to liquidate. The Fund is non-diversified, which means that it can invest a large percentage of its assets in the securities of any one or more issuers. This increases the Fund's potential risk exposure. There is no assurance that these and other strategies used by the Fund will be successful. The Fund is not intended to outperform stocks and bonds during strong market rallies. Please see the prospectus for a more complete discussion of the Fund's risks. Before investing, consider the product's investment objectives, risks, charges and expenses. Contact your advisor or Pioneer Investments for a prospectus or summary prospectus containing this information. Read it carefully. Any information in this shareholder report regarding market or economic trends or the factors influencing the Fund's historical or future performance are statements of opinion as of the date of this report. Past performance is no guarantee of future results. Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 9 Portfolio Summary | 2/29/16 Portfolio Diversification -------------------------------------------------------------------------------- (As a percentage of total investment portfolio)(#) [THE FOLLOWING DATA WAS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL] U.S. Government Securities 89.0% Foreign Government Bonds 9.7% Swaptions 1.1% Options 0.2% (#) The chart does not include all of the Fund's derivative investments. For Information regarding derivative investments, see the Portfolio Management Discussion, the Schedule of Investments and the Notes to Financial Statements. Geographical Diversification -------------------------------------------------------------------------------- (As a percentage of long-term holdings based on country or domicile) [THE FOLLOWING DATA WAS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL] United States 90.3% Italy 2.9% Ireland 2.2% Japan 2.1% Norway 1.6% Germany 0.9% 10 Largest Holdings -------------------------------------------------------------------------------- (As a percentage of long-term holdings)** 1. U.S. Treasury Bills, 6/30/16 24.39% -------------------------------------------------------------------------------- 2. U.S. Treasury Bills, 5/26/16 22.76 -------------------------------------------------------------------------------- 3. U.S. Treasury Bills, 9/15/16 18.34 -------------------------------------------------------------------------------- 4. U.S. Treasury Bills, 3/3/16 13.16 -------------------------------------------------------------------------------- 5. U.S. Treasury Bills, 4/7/16 8.95 -------------------------------------------------------------------------------- 6. Italy Buoni Poliennali Del Tesoro, 2.7%, 3/1/47 2.90 -------------------------------------------------------------------------------- 7. Ireland Government Bond, 2.4%, 5/15/30 2.20 -------------------------------------------------------------------------------- 8. Japanese Government CPI Linked Bond, 0.1%, 9/10/23 1.92 -------------------------------------------------------------------------------- 9. Norway Government Bond, 1.75%, 3/13/25 1.63 -------------------------------------------------------------------------------- 10. U.S. Treasury Bills, 1/5/17 1.37 -------------------------------------------------------------------------------- ** This list excludes temporary cash investments and derivative instruments. Due to the exclusion of derivatives, the list may not represent the Fund's market exposures. See the Portfolio Management Discussion, the Schedule of Investments and the Notes to Financial Statements. The portfolio is actively managed, and current holdings may be different. The holdings listed should not be considered recommendations to buy or sell any security listed. 10 Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 Prices and Distributions | 2/29/16 Net Asset Value per Share -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Class 2/29/16 8/31/15 -------------------------------------------------------------------------------- A $9.16 $9.67 -------------------------------------------------------------------------------- C $9.15 $9.63 -------------------------------------------------------------------------------- K $9.18 $9.70 -------------------------------------------------------------------------------- Y $9.16 $9.69 -------------------------------------------------------------------------------- Distributions per Share: 9/1/15-2/29/16 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Net Investment Short-Term Long-Term Class Income Capital Gains Capital Gains -------------------------------------------------------------------------------- A $0.2375 $-- $-- -------------------------------------------------------------------------------- C $0.1711 $-- $-- -------------------------------------------------------------------------------- K $0.2517 $-- $-- -------------------------------------------------------------------------------- Y $0.2697 $-- $-- -------------------------------------------------------------------------------- Index Definitions -------------------------------------------------------------------------------- The Bank of America Merrill Lynch (BofA ML) 3-month US Treasury Bill Index is an unmanaged market index of U.S. Treasury securities maturing in 90 days, that assumes reinvestment of all income. Index returns are calculated monthly, assume reinvestment of dividends and, unlike Fund returns, do not reflect any fees, expenses or sales charges. It is not possible to invest directly in an index. The index defined here pertains to the "Value of $10,000 Investment" and "Value of $5 Million Investment" charts appearing on pages 12-15. Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 11 Performance Update | 2/29/16 Class A Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Class A shares of Pioneer Absolute Return Bond Fund at public offering price during the periods shown, compared to that of the Bank of America Merrill Lynch (BofA ML) 3-month US Treasury Bill Index. Average Annual Total Returns (As of February 29, 2016) -------------------------------------------------------------------------------- Net Public BofA ML Asset Offering 3-Month Value Price U.S. Treasury Period (NAV) (POP) Bill Index -------------------------------------------------------------------------------- Life of Class (1/30/14) -2.54% -4.67% 0.05% 1 Year -2.95 -7.36 0.08 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated December 31, 2015) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 2.98% 1.15% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Absolute BofA ML 3-month US Return Bond Fund Treasury Bill Index 1/14 $9,550 $10,000 2/14 $9,484 $10,000 2/15 $9,329 $10,003 2/16 $9,054 $10,011 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. NAV results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. POP returns reflect deduction of maximum 4.50% sales charge. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The net expense ratio reflects the contractual expense limitation currently in effect through January 1, 2017, for Class A shares. There can be no assurance that Pioneer will extend the expense limitation beyond such time. Please see the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. 12 Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 Performance Update | 2/29/16 Class C Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Class C shares of Pioneer Absolute Return Bond Fund during the periods shown, compared to that of the Bank of America Merrill Lynch (BofA ML) 3-month US Treasury Bill Index. Average Annual Total Returns (As of February 29, 2016) -------------------------------------------------------------------------------- BofA ML 3-Month If If U.S. Treasury Period Held Redeemed Bill Index -------------------------------------------------------------------------------- Life of Class (1/30/14) -3.24% -3.24% 0.05% 1 Year -3.63 -3.63 0.08 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated December 31, 2015) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 3.73% 1.90% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Absolute BofA ML 3-month US Return Bond Fund Treasury Bill Index 1/14 $10,000 $10,000 2/14 $ 9,930 $10,000 2/15 $ 9,689 $10,003 2/16 $ 9,337 $10,011 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Class C shares held for less than one year are also subject to a 1% contingent deferred sales charge (CDSC). "If Held" results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The net expense ratio reflects the contractual expense limitation currently in effect through January 1, 2017, for Class C shares. There can be no assurance that Pioneer will extend the expense limitation beyond such time. Please see the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 13 Performance Update | 2/29/16 Class K Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Class K shares of Pioneer Absolute Return Bond Fund during the periods shown, compared to that of the Bank of America Merrill Lynch (BofA ML) 3-month US Treasury Bill Index. Average Annual Total Returns (As of February 29, 2016) -------------------------------------------------------------------------------- Net BofA ML Asset 3-Month Value U.S. Treasury Period (NAV) Bill Index -------------------------------------------------------------------------------- Life of Fund (1/30/14) -2.37% 0.05% 1 Year -2.60 0.08 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated December 31, 2015) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 2.70% 0.75% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Absolute BofA ML 3-month US Return Bond Fund Treasury Bill Index 1/14 $10,000 $10,000 2/14 $ 9,930 $10,000 2/15 $ 9,768 $10,003 2/16 $ 9,514 $10,011 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. The performance shown for Class K shares for the period prior to the commencement of operations of Class K shares on December 31, 2014, is the net asset value performance of the Fund's Class A shares, which has not been restated to reflect any differences in expenses, including Rule 12b-1 fees applicable to Class A shares. Since fees for Class A shares generally are higher than those of Class K shares, the performance of Class K shares prior to their inception would have been higher than the performance shown. For the period beginning December 31, 2014, the actual performance of Class K shares is reflected. Class K shares are not subject to sales charges and are available for limited groups of eligible investors, including institutional investors. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The net expense ratio reflects the contractual expense limitation currently in effect through January 1, 2017, for Class K shares. There can be no assurance that Pioneer will extend the expense limitation beyond such time. Please see the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. 14 Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 Performance Update | 2/29/16 Class Y Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $5 million investment made in Class Y shares of Pioneer Absolute Return Bond Fund during the periods shown, compared to that of the Bank of America Merrill Lynch (BofA ML) 3-month US Treasury Bill Index. Average Annual Total Returns (As of February 29, 2016) -------------------------------------------------------------------------------- Net BofA ML Asset 3-Month Value U.S. Treasury Period (NAV) Bill Index -------------------------------------------------------------------------------- Life of Class (1/30/14) -2.26% 0.05% 1 Year -2.62 0.08 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated December 31, 2015) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 2.70% 0.75% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $5 Million Investment Pioneer Absolute BofA ML 3-month US Return Bond Fund Treasury Bill Index 1/14 $5,000,000 $5,000,000 2/14 $4,970,000 $5,000,029 2/15 $4,896,425 $5,001,567 2/16 $4,768,052 $5,005,434 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Class Y shares are not subject to sales charges and are available for limited groups of eligible investors, including institutional investors. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The net expense ratio reflects the contractual expense limitation currently in effect through January 1, 2017, for Class Y shares. There can be no assurance that Pioneer will extend the expense limitation beyond such time. Please see the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 15 Comparing Ongoing Fund Expenses As a shareowner in the Fund, you incur two types of costs: (1) ongoing costs, including management fees, distribution and/or service (12b-1) fees, and other Fund expenses; and (2) transaction costs, including sales charges (loads) on purchase payments. This example is intended to help you understand your ongoing expenses (in dollars) of investing in the Fund and to compare these costs with the ongoing costs of investing in other mutual funds. The example is based on an investment of $1,000 at the beginning of the Fund's latest six-month period and held throughout the six months. Using the Tables -------------------------------------------------------------------------------- Actual Expenses The first table below provides information about actual account values and actual expenses. You may use the information in this table, together with the amount you invested, to estimate the expenses that you paid over the period as follows: (1) Divide your account value by $1,000 Example: an $8,600 account value (divided by) $1,000 = 8.6 (2) Multiply the result in (1) above by the corresponding share class's number in the third row under the heading entitled "Expenses Paid During Period" to estimate the expenses you paid on your account during this period. Expenses Paid on a $1,000 Investment in Pioneer Absolute Return Bond Fund Based on actual returns from September 1, 2015, through February 29, 2016. ------------------------------------------------------------------------------------------------------- Share Class A C K Y ------------------------------------------------------------------------------------------------------- Beginning Account $1,000.00 $1,000.00 $1,000.00 $1,000.00 Value on 9/1/15 ------------------------------------------------------------------------------------------------------- Ending Account $ 971.50 $ 967.70 $ 972.00 $ 972.80 Value (after expenses) on 2/29/16 ------------------------------------------------------------------------------------------------------- Expenses Paid $ 4.56 $ 8.07 $ 3.68 $ 3.09 During Period* ------------------------------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized net expense ratio of 0.93%, 1.65%, 0.75% and 0.63% for Class A, Class C, Class K, and Class Y shares, respectively, multiplied by the average account value over the period, multiplied by 182/366 (to reflect the one half year period). 16 Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 Hypothetical Example for Comparison Purposes The table below provides information about hypothetical account values and hypothetical expenses based on the Fund's actual expense ratio and an assumed rate of return of 5% per year before expenses, which is not the Fund's actual return. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in the Fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds. Please note that the expenses shown in the tables are meant to highlight your ongoing costs only and do not reflect any transaction costs, such as sales charges (loads) that are charged at the time of the transaction. Therefore, the table below is useful in comparing ongoing costs only and will not help you determine the relative total costs of owning different funds. In addition, if these transaction costs were included, your costs would have been higher. Expenses Paid on a $1,000 Investment in Pioneer Absolute Return Bond Fund Based on a hypothetical 5% return per year before expenses, reflecting the period from September 1, 2015, through February 29, 2016. ------------------------------------------------------------------------------------------------------- Share Class A C K Y ------------------------------------------------------------------------------------------------------- Beginning Account $1,000.00 $1,000.00 $1,000.00 $1,000.00 Value on 9/1/15 ------------------------------------------------------------------------------------------------------- Ending Account $1,020.24 $1,016.66 $1,021.13 $1,021.73 Value (after expenses) on 2/29/16 ------------------------------------------------------------------------------------------------------- Expenses Paid $ 4.67 $ 8.27 $ 3.77 $ 3.17 During Period* ------------------------------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized net expense ratio of 0.93%, 1.65%, 0.75% and 0.63% for Class A, Class C, Class K, and Class Y shares, respectively, multiplied by the average account value over the period, multiplied by 182/366 (to reflect the one half year period). Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 17 Schedule of Investments | 2/29/16 (unaudited) --------------------------------------------------------------------------------------------------- Principal Amount ($) Value --------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- 102.1% 310,000 U.S. Treasury Bills, 1/5/17 (b) $ 308,516 2,970,000 U.S. Treasury Bills, 3/3/16 (b) 2,969,976 2,020,000 U.S. Treasury Bills, 4/7/16 (b) 2,019,491 5,140,000 U.S. Treasury Bills, 5/26/16 (b) 5,136,042 5,510,000 U.S. Treasury Bills, 6/30/16 (b) 5,503,788 4,150,000 U.S. Treasury Bills, 9/15/16 (b) 4,139,505 ------------- $ 20,077,318 --------------------------------------------------------------------------------------------------- TOTAL U.S. GOVERNMENT AND AGENCY OBLIGATIONS (Cost $20,077,781) $ 20,077,318 --------------------------------------------------------------------------------------------------- FOREIGN GOVERNMENT BONDS -- 11.1% EUR 162,403 Deutsche Bundesrepublik Inflation Linked Bond, 0.1%, 4/15/46 $ 199,359 EUR 399,000 Ireland Government Bond, 2.4%, 5/15/30 496,292 EUR 580,000 Italy Buoni Poliennali Del Tesoro, 2.7%, 3/1/47 654,136 JPY 3,388,572 Japanese Government CPI Linked Bond, 0.1%, 3/10/24 30,913 JPY 47,518,000 Japanese Government CPI Linked Bond, 0.1%, 9/10/23 433,495 NOK 3,060,000 Norway Government Bond, 1.75%, 3/13/25 367,162 ------------- $ 2,181,357 --------------------------------------------------------------------------------------------------- TOTAL FOREIGN GOVERNMENT BONDS (Cost $2,217,819) $ 2,181,357 --------------------------------------------------------------------------------------------------- --------------------------------------------------------------------------------------------------- Principal Strike Expiration Amount ($) Description Counterparty Price Date Value --------------------------------------------------------------------------------------------------- CURRENCY CALL OPTIONS PURCHASED -- 0.2% GBP 80,000 Call GBP Put USD Morgan Stanley Capital Services LLC 1.4375 3/3/16 $ 1 EUR 160,000 Call EUR Put USD Goldman Sachs International 1.1050 3/2/16 31 40,000 Call USD Put PLN Morgan Stanley Capital Services LLC 3.9700 3/1/16 246 AUD 170,000 Call AUD Put NZD Goldman Sachs International 1.0900 3/18/16 897 60,000 Call USD Put ZAR Morgan Stanley Capital Services LLC 15.7000 3/4/16 1,010 120,000 Call USD Put KRW Goldman Sachs International 1213.0000 3/2/16 2,120 230,000 Call USD Put CNY Barclays Bank Plc 6.4000 10/25/16 11,823 250,000 Call USD Put CNY Barclays Bank Plc 6.4000 10/25/16 12,851 250,000 Call USD Put CNY Deutsche Bank AG 6.4000 10/25/16 12,851 --------------------------------------------------------------------------------------------------- TOTAL CURRENCY CALL OPTIONS PURCHASED $ 41,828 ------------- (Premiums paid $15,793) $ 41,828 --------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 18 Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 --------------------------------------------------------------------------------------------------- Principal Strike Expiration Amount ($) Description Counterparty Price Date Value --------------------------------------------------------------------------------------------------- CURRENCY PUT OPTIONS PURCHASED -- 0.0%+ 130,000 Put USD Call TRY Goldman Sachs International 2.650 6/28/16 $ 39 PLN 230,000 Put PLN Call HUF Goldman Sachs International 73.450 3/3/16 1,715 60,000 Put USD Call CLP Goldman Sachs International 700.000 11/17/16 1,913 --------------------------------------------------------------------------------------------------- TOTAL CURRENCY PUT OPTIONS PURCHASED $ 3,666 ------------- (Premiums paid $4,186) $ 3,666 --------------------------------------------------------------------------------------------------- --------------------------------------------------------------------------------------------------- Principal Pay/ Floating Pay/ Fixed Expiration Amount ($) Receive Rate Receive Rate Counterparty Date Value --------------------------------------------------------------------------------------------------- CREDIT DEFAULT SWAPTIONS PURCHASED -- 0.1% 500,000 Receive USD 10Yr Pay 2.740 Morgan ITRAXX Stanley Capital Services LLC 3/9/17 $ 3,086 EUR 3,100,000 Pay EUR 5Yr Receive 1.000 Barclays ITRAXX Bank Plc 3/16/16 8,411 --------------------------------------------------------------------------------------------------- TOTAL CREDIT DEFAULT SWAPTIONS PURCHASED $ 11,497 ------------- (Premiums paid $24,777) $ 11,497 --------------------------------------------------------------------------------------------------- --------------------------------------------------------------------------------------------------- Principal Pay/ Floating Pay/ Fixed Expiration Amount ($) Receive Rate Receive Rate Counterparty Date Value --------------------------------------------------------------------------------------------------- INTEREST RATE SWAPTIONS PURCHASED -- 1.3% 5,300,000 Receive USD 2Yr Pay 1.100 Morgan Stanley Capital Services LLC 7/15/16 $ 9,093 EUR 625,000 Receive EUR 10 Yr Pay 0.970 Morgan Stanley Capital Services LLC 2/13/17 9,684 EUR 625,000 Pay EUR 10 Yr Receive 0.970 Morgan Stanley Capital Services LLC 2/13/17 30,073 1,000,000 Receive USD 30Yr Pay 2.800 Goldman Sachs International 5/26/17 30,931 1,000,000 Pay USD 30Yr Receive 2.800 Goldman Sachs International 5/26/17 171,529 --------------------------------------------------------------------------------------------------- TOTAL INTEREST RATE SWAPTIONS PURCHASED $ 251,311 ------------- (Premiums paid $253,934) $ 251,311 --------------------------------------------------------------------------------------------------- TOTAL INVESTMENT IN SECURITIES -- 114.8% (Cost $22,594,290) (a) $ 22,566,977 --------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 19 Schedule of Investments | 2/29/16 (unaudited) (continued) --------------------------------------------------------------------------------------------------- Principal Pay/ Floating Pay/ Fixed Expiration Amount ($) Receive Rate Receive Rate Counterparty Date Value --------------------------------------------------------------------------------------------------- INTEREST RATE SWAPTIONS WRITTEN -- (1.0)% GBP (600,000) Pay GBP 30Yr Receive 2.30 Goldman Sachs International 5/26/17 $ (168,374) GBP (600,000) Receive GBP 30Yr Pay 2.30 Goldman Sachs International 5/26/17 (19,227) (7,950,000) Receive USD 2yr Pay 1.40 Morgan Stanley Capital Services LLC 7/15/16 (4,162) ------------- $ (191,763) --------------------------------------------------------------------------------------------------- TOTAL INTEREST RATE SWAPTIONS WRITTEN (Premiums received $(198,363)) $ (191,763) --------------------------------------------------------------------------------------------------- --------------------------------------------------------------------------------------------------- Principal Strike Expiration Amount ($) Description Counterparty Price Date Value --------------------------------------------------------------------------------------------------- CURRENCY CALL OPTIONS WRITTEN -- (0.0)%+ (120,000) Call USD Put ZAR Morgan Stanley Capital Services LLC 15.95 3/4/16 $ (1,064) (80,000) Call USD Put CNY Morgan Stanley Capital Services LLC 7.00 8/23/16 (974) (130,000) Call USD Put TRY Goldman Sachs International 3.70 6/28/16 (366) (80,000) Call USD Put PLN Morgan Stanley Capital Services LLC 4.00 3/1/16 (72) PLN (230,000) Call PLN Put HUF Goldman Sachs International 75.00 3/3/16 -- ------------- $ (2,477) --------------------------------------------------------------------------------------------------- TOTAL CURRENCY CALL OPTIONS WRITTEN (Premiums received $(4,581)) $ (2,477) --------------------------------------------------------------------------------------------------- --------------------------------------------------------------------------------------------------- Principal Strike Expiration Amount ($) Description Counterparty Price Date Value --------------------------------------------------------------------------------------------------- CURRENCY PUT OPTIONS WRITTEN -- (0.0)%+ PLN (230,000) Put PLN Call HUF Goldman Sachs International 72.25 3/3/16 $ (755) AUD (170,000) Put AUD Call NZD Goldman Sachs International 1.065 3/18/16 (429) ------------- $ (1,184) --------------------------------------------------------------------------------------------------- TOTAL CURRENCY PUT OPTIONS WRITTEN (Premiums received $(845)) $ (1,184) --------------------------------------------------------------------------------------------------- OTHER ASSETS & LIABILITIES -- (13.8)% $ (2,709,719) --------------------------------------------------------------------------------------------------- TOTAL NET ASSETS -- 100.0% $ 19,661,834 =================================================================================================== The accompanying notes are an integral part of these financial statements. 20 Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 + Amount rounds to less than 0.1% or (0.1)%. (a) At February 29, 2016, the net unrealized depreciation on investments based on cost for federal income tax purposes of $22,594,290 was as follows: Aggregate gross unrealized appreciation for all investments in which there is an excess of value over tax cost $ 155,468 Aggregate gross unrealized depreciation for all investments in which there is an excess of tax cost over value (182,781) ----------- Net unrealized depreciation $ (27,313) =========== (b) Security issued with a zero coupon. Income is earned through accretion of discount. Principal amounts are denominated in U.S. Dollars unless otherwise noted: AUD Australian Dollar CLP Chilean Peso CNY New Chinese Yuan EUR European Euro GBP British Pound Sterling HUF Hungarian Forint JPY Japanese Yen KRW New Korean Won NOK Norwegian Krone NZD New Zealand Dollar PLN Polish Zloty TRY Turkish Lira ZAR South African Dollar Purchases and sales of securities (excluding temporary cash investments) for the six months ended February 29, 2016 aggregated $1,007,207 and $3,684,633, respectively. CENTRALLY CLEARED CREDIT DEFAULT SWAP AGREEMENT -- BUY PROTECTION ------------------------------------------------------------------------------------------------------ Notional Obligation Expiration Premiums Unrealized Principal ($) Exchange Entity/Index Coupon Date Paid (Depreciation) ------------------------------------------------------------------------------------------------------ EUR (1,500,000) Intercontinental Markit iTraxx Exchange Europe Index 1.00% 12/20/20 $ 7,076 $(10,682) ====================================================================================================== NOTE: Principal amounts are denominated in U.S. Dollars unless otherwise noted: EUR Euro The accompanying notes are an integral part of these financial statements. Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 21 Schedule of Investments | 2/29/16 (unaudited) (continued) CROSS CURRENCY SWAP AGREEMENT ------------------------------------------------------------------------------------------------------ Annual Notional Floating Fixed Expiration Unrealized Principal ($) Counterparty Pay Receive Rate Rate Date (Depreciation) ------------------------------------------------------------------------------------------------------ SEK 5,497,600 Barclays Bank Plc CHF SEK STIBOR Fix 3M 0.00% 1/16/24 $(10,969) ====================================================================================================== NOTE: Principal amounts are denominated in U.S. Dollars unless otherwise noted: SEK Swedish Koruna CHF Swiss Franc INFLATION RATE SWAP AGREEMENTS ------------------------------------------------------------------------------------------------------ Net Unrealized Notional Pay/ Annual Expiration Appreciation Principal ($) Counterparty Receive Index Fixed Rate Date (Depreciation) ------------------------------------------------------------------------------------------------------ EUR (600,000) Goldman Sachs International Receive EUCPI 1.209% 2/5/25 $ (9,714) EUR 600,000 Goldman Sachs International Pay EUCPI 0.770% 2/5/20 4,225 EUR (800,000) Goldman Sachs International Receive EUCPI 0.860% 12/1/18 (12,757) EUR 510,000 Goldman Sachs International Pay EUCPI 1.548% 6/30/25 38,147 EUR 350,000 Goldman Sachs International Pay EUCPI 0.839% 8/17/20 6,574 EUR (350,000) Goldman Sachs International Receive EUCPI 0.839% 8/17/25 (14,177) EUR (275,000) Morgan Stanley Capital Services LLC Receive EUCPI 1.078% 5/22/19 (7,135) EUR (300,000) Morgan Stanley Capital Services LLC Receive EUCPI 0.988% 5/29/19 (6,559) EUR (367,500) Morgan Stanley Capital Services LLC Receive EUCPI 1.238% 2/7/19 (19,453) 994,250 Credit Suisse International Pay USCPI 2.145% 2/7/19 50,897 79,000 Morgan Stanley Capital Services LLC Pay USCPI 1.508% 11/9/20 510 ------------------------------------------------------------------------------------------------------ Total $ 30,558 ====================================================================================================== EUCPI Eurostat Eurozone HICP Ex Tobacco Unrevised Series NSA USCPI United States Consumer Price Index NOTE: Principal amounts are denominated in U.S. Dollars unless otherwise noted: EUR Euro The accompanying notes are an integral part of these financial statements. 22 Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 INTEREST RATE SWAP AGREEMENTS ------------------------------------------------------------------------------------------------------------------------- Net Annual Premiums Unrealized Notional Pay/ Floating Fixed Expiration Received Appreciation Principal ($) Counterparty Receive Rate Rate Date (Paid) (Depreciation) ------------------------------------------------------------------------------------------------------------------------- AUD (588,500) Morgan Stanley LIBOR AUD Capital Services LLC Receive 3 Month 3.280% 1/13/25 -- $ (10,390) AUD (611,800) Morgan Stanley LIBOR AUD Capital Services LLC Receive 3 Month 3.160% 2/5/25 -- (8,178) AUD 640,000 Deutsche Bank Receive LIBOR AUD 6 Month 2.980% 11/26/25 -- 20,303 AUD 638,000 Morgan Stanley LIBOR AUD Capital Services LLC Pay 6 Month 2.870% 1/13/16 (35) 15,256 AUD 300,000 Deutsche Bank Pay LIBOR AUD 6 Month 2.840% 1/25/26 -- 6,983 AUD 246,750 Deutsche Bank Pay LIBOR AUD 6 Month 2.740% 2/3/26 -- 4,046 AUD (74,000) Morgan Stanley LIBOR AUD Capital Services LLC Receive 6 Month 2.980% 2/10/26 -- (311) CAD (1,154,000) Goldman Sachs Canadian 3 Month International Receive Prime Lending Rate 1.270% 7/17/20 -- (16,158) CAD (1,154,000) Goldman Sachs Canadian 3 Month International Receive Prime Lending Rate 1.260% 7/17/20 -- (15,781) CNY (6,850,000) Goldman Sachs China 7 Day International Receive Fixing Rate 2.210% 1/25/18 -- (602) CNY (6,800,000) Goldman Sachs China 7 Day International Receive Fixing Rate 2.210% 1/29/18 -- (671) EUR 660,000 Deutsche Bank Pay EURIBOR 6 Month 1.800% 12/15/54 -- 43,875 EUR (970,000) Deutsche Bank Receive EURIBOR 6 Month 1.530% 12/15/64 -- (61,807) EUR (510,000) Deutsche Bank Receive EURIBOR 6 Month 0.980% 2/16/65 -- (12,138) EUR 400,000 Deutsche Bank Pay EURIBOR 6 Month 1.320% 2/16/55 -- 11,626 EUR 1,105,000 Deutsche Bank Pay EONIA 1 Day Interbank Rate 0.730% 3/20/45 -- (16,309) EUR (1,375,000) Deutsche Bank Receive EURIBOR 6 Month 0.920% 3/20/45 -- 10,223 EUR 275,000 Deutsche Bank Pay EURIBOR 6 Month 0.270% 5/22/19 -- 4,921 EUR (300,000) Deutsche Bank Pay EURIBOR 6 Month 0.260% 5/29/19 -- 5,254 EUR (250,000) Deutsche Bank Receive EURIBOR 6 Month 1.650% 3/20/45 -- (49,735) EUR 200,000 Deutsche Bank Pay EONIA 1 Day Interbank Rate 1.490% 3/20/45 -- 41,860 EUR 310,000 Deutsche Bank Pay EURIBOR 6 Month 1.820% 12/15/54 21,136 EUR (230,000) Deutsche Bank Receive EURIBOR 6 Month 1.480% 12/15/64 -- (13,836) EUR 1,310,000 Deutsche Bank Pay EONIA 1 Day Interbank Rate 0.760% 11/25/24 -- 89,774 EUR 1,850,000 Deutsche Bank Receive EURIBOR 6 Month 0.270% 1/11/20 -- 12,890 EUR (780,000) Deutsche Bank Receive EURIBOR 6 Month 0.870% 1/12/26 -- (33,559) EUR (300,000) Deutsche Bank Receive EURIBOR 6 Month 1.510% 1/12/46 -- (45,753) EUR 790,000 Deutsche Bank Pay EONIA 1 Day Interbank Rate 1.280% 1/12/36 -- 92,457 EUR 1,800,000 Deutsche Bank Pay EURIBOR 6 Month 0.310% 1/15/20 -- 14,161 The accompanying notes are an integral part of these financial statements. Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 23 Schedule of Investments | 2/29/16 (unaudited) (continued) INTEREST RATE SWAP AGREEMENTS (continued) ------------------------------------------------------------------------------------------------------------------------- Net Annual Premiums Unrealized Notional Pay/ Floating Fixed Expiration Received Appreciation Principal ($) Counterparty Receive Rate Rate Date (Paid) (Depreciation) ------------------------------------------------------------------------------------------------------------------------- EUR 810,000 Deutsche Bank Pay EONIA 1 Day Interbank Rate 1.270% 1/21/36 -- $ 92,078 EUR 275,000 Deutsche Bank Pay EONIA 1 Day Interbank Rate 1.270% 3/20/45 -- 36,432 EUR 372,500 Morgan Stanley Capital Services LLC Pay EURIBOR 6 Month 1.004% 2/7/19 14,531 HKD (6,300,000) Goldman Sachs Hong Kong International Receive 3 Month HIBOR 1.540% 2/18/21 79 (6,281) HKD (3,200,000) Goldman Sachs Hong Kong International Receive 3 Month HIBOR 1.500% 2/19/21 39 (706) JPY (33,820,000) Deutsche Bank Receive LIBOR JPY 6 Month 0.620% 10/10/24 -- (15,625) JPY (238,000,000) Deutsche Bank Receive LIBOR JPY 6 Month 0.140% 1/11/20 -- (14,149) JPY (230,000,000) Deutsche Bank Receive LIBOR JPY 6 Month 0.140% 1/15/20 -- (13,491) JPY 120,000,000 Deutsche Bank Receive LIBOR JPY 6 Month 0.020% 2/22/23 -- (4,303) NZD 702,000 Morgan Stanley NZD Bank Capital Services LLC Pay Bill 3 Month 3.850% 1/13/25 -- 8,544 NZD 711,000 Morgan Stanley NZD Bank Bill Capital Services LLC Pay 3 Month 3.760% 2/7/25 6,869 SEK 2,075,000 Barclays Bank Plc Pay LIBOR SEK 3 Month 0.760% 6/22/20 8,996 SEK 2,390,000 Goldman Sachs LIBOR SEK International Pay 3 Month 0.650% 7/16/20 -- 8,495 SEK 4,900,000 Barclays Bank Plc Pay LIBOR SEK 3 Month 0.500% 8/11/20 -- 12,418 SEK 2,252,000 Barclays Bank Plc Pay LIBOR SEK 3 Month 0.460% 8/21/20 -- 5,125 SEK 2,295,000 Goldman Sachs LIBOR SEK International Pay 3 Month 0.490% 11/17/20 -- 4,890 SEK 2,330,000 Goldman Sachs LIBOR SEK International Pay 3 Month 0.420% 11/25/20 -- 4,002 SEK 2,265,000 Barclays Bank Plc Pay LIBOR SEK 3 Month 0.420% 12/2/20 -- 3,986 THB (17,000,000) Morgan Stanley Thailand Prime Capital Services LLC Receive Lending Rate 6 Month 1.880% 2/18/21 -- 2,004 THB (17,000,000) Goldman Sachs Thailand Prime International Receive Lending Rate 6 Month 1.890% 2/18/21 -- 1,777 THB (17,000,000) Goldman Sachs Thailand Prime International Receive Lending Rate 6 Month 1.890% 2/18/21 -- 1,777 (1,690,000) Deutsche Bank Receive LIBOR USD 3 Month 3.040% 11/28/22 -- (103,135) 3,130,000 Deutsche Bank Pay LIBOR USD 3 Month 2.250% 11/28/18 -- 78,210 The accompanying notes are an integral part of these financial statements. 24 Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 INTEREST RATE SWAP AGREEMENTS (continued) -------------------------------------------------------------------------------------------------------------- Net Annual Premiums Unrealized Notional Pay/ Floating Fixed Expiration Received Appreciation Principal ($) Counterparty Receive Rate Rate Date (Paid) (Depreciation) -------------------------------------------------------------------------------------------------------------- 3,150,000 Deutsche Bank Pay LIBOR USD 3 Month 1.810% 1/23/19 -- $ 49,491 (1,630,000) Deutsche Bank Receive LIBOR USD 3 Month 2.340% 1/23/23 (43,031) (259,500) Deutsche Bank Receive LIBOR USD 3 Month 1.820% 6/19/20 -- (8,634) (286,000) Deutsche Bank Receive LIBOR USD 3 Month 1.830% 7/16/20 -- (9,601) (574,000) Deutsche Bank Receive LIBOR USD 3 Month 1.750% 8/11/20 -- (17,051) (270,000) Deutsche Bank Receive LIBOR USD 3 Month 1.690% 8/21/20 -- (7,254) (80,000) Deutsche Bank Receive LIBOR USD 3 Month 1.540% 11/9/20 -- (2,002) (264,000) Deutsche Bank Receive LIBOR USD 3 Month 1.610% 11/17/20 -- (7,439) (266,000) Deutsche Bank Receive LIBOR USD 3 Month 1.590% 11/25/20 -- (6,864) (460,000) Deutsche Bank Receive LIBOR USD 3 Month 2.090% 11/27/25 -- (24,964) (259,000) Deutsche Bank Receive LIBOR USD 3 Month 1.550% 12/2/20 -- (5,951) (900,000) Deutsche Bank Receive LIBOR USD 3 Month 2.015% 1/7/26 -- (50,566) (434,000) Deutsche Bank Receive LIBOR USD 3 Month 1.970% 1/14/26 -- (16,863) (200,000) Deutsche Bank Receive LIBOR USD 3 Month 1.910% 1/26/26 -- (6,554) (147,500) Deutsche Bank Receive LIBOR USD 3 Month 1.810% 2/4/26 -- (3,360) (1,015,000) Deutsche Bank Receive LIBOR USD 3 Month 1.590% 2/7/19 (20,342) -------------------------------------------------------------------------------------------------------------- Total $ 83 $ 60,996 ============================================================================================================== Principal amounts are denominated in U.S. Dollars unless otherwise noted: AUD Australian Dollar CAD Canadian Dollar CNY New Chinese Yuan EUR Euro HKD Hong Kong Dollar JPY Japanese Yen NZD New Zealand Dollar SEK Swedish Krone THB Thai Baht The accompanying notes are an integral part of these financial statements. Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 25 Schedule of Investments | 2/29/16 (unaudited) (continued) Various inputs are used in determining the value of the Fund's investments. These inputs are summarized in the three broad levels listed below. Level 1 -- quoted prices in active markets for identical securities. Level 2 -- other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.) See Notes to Financial Statements -- Note 1A. Level 3 -- significant unobservable inputs (including the Fund's own assumptions in determining fair value of investments) See Notes to Financial Statements -- Note 1A. The following is a summary of the inputs used as of February 29, 2016, in valuing the Fund's assets: -------------------------------------------------------------------------------------------- Level 1 Level 2 Level 3 Total -------------------------------------------------------------------------------------------- U.S. Government and Agency Obligations $ -- $ 20,077,318 $ -- $20,077,318 Foreign Government Bonds -- 2,181,357 -- 2,181,357 Currency Call Options Purchased -- 41,828 -- 41,828 Currency Put Options Purchased -- 3,666 -- 3,666 Credit Default Swaptions Purchased -- 11,497 -- 11,497 Interest Rate Swaptions Purchased -- 251,311 -- 251,311 -------------------------------------------------------------------------------------------- Total $ -- $ 22,566,977 $ -- $22,566,977 ============================================================================================ Other Financial Instruments Net unrealized depreciation on futures contracts $ (157,624) $ -- $ -- $ (157,624) Unrealized appreciation on forward foreign currency contracts -- 161,906 -- 161,906 Unrealized depreciation on forward foreign currency contracts -- (226,767) -- (226,767) Net unrealized depreciation on centrally cleared credit default swap contracts -- (10,682) -- (10,682) Net unrealized depreciation on cross currency swaps -- (10,969) -- (10,969) Net unrealized appreciation on inflation swaps -- 30,558 -- 30,558 Net unrealized appreciation on interest rate swaps -- 60,996 -- 60,996 Currency call options written -- (2,477) -- (2,477) Currency put options written -- (1,184) -- (1,184) Interest rate swaptions written -- (191,763) -- (191,763) -------------------------------------------------------------------------------------------- Total Other Financial Instruments $ (157,624) $ (190,382) $ -- $ (348,006) ============================================================================================ During the six months ended February 29, 2016, there were no transfers between Levels 1, 2 and 3. The following is a summary of the fair valuation of certain Fund's assets as of February 29, 2016: -------------------------------------------------------------------------------------------- Level 1 Level 2 Level 3 Total -------------------------------------------------------------------------------------------- Assets: Foreign currencies, at value (cost $220,724) $ -- $ 226,990 $ -- $ 226,990 Restricted cash -- 413,979 -- 413,979 Variation margin for centrally cleared swap contracts -- 57,628 -- 57,628 Liabilities: Variation margin for futures contracts (16,765) -- -- (16,765) -------------------------------------------------------------------------------------------- Total $ (16,765) $ 698,597 $ -- $ 681,832 ============================================================================================ The accompanying notes are an integral part of these financial statements. 26 Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 Statement of Assets and Liabilities | 2/29/16 (unaudited) ASSETS: Investment in securities, at value (cost $22,594,290) $22,566,977 Cash 305,058 Foreign currencies, at value (cost $220,724) 226,990 Restricted cash* 413,979 Receivables -- Investment securities sold 2,017,418 Interest 16,402 Swap contracts receivable 2,680 Swap contracts, premiums paid 7,159 Variation margin on centrally cleared swap contracts 57,628 Due from Pioneer Investment Management, Inc. 65,245 Unrealized appreciation on forward foreign currency contracts 161,906 Net unrealized appreciation on swap contracts 69,903 Other assets 36,196 ------------------------------------------------------------------------------------- Total assets $25,947,541 ===================================================================================== LIABILITIES: Payables -- Investment securities purchased $ 5,504,901 Fund shares redeemed 4,000 Trustee fees 1,134 Distributions 5 Futures payable 37,819 Swap payable 18,883 Written options and written swaptions (premiums received $203,789) 195,424 Variation margin for futures contracts 16,765 Unrealized depreciation on forward foreign currency contracts 226,767 Net unrealized depreciation on futures contracts 157,624 Due to affiliates 12,193 Accrued expenses 110,192 ------------------------------------------------------------------------------------- Total liabilities $ 6,285,707 ===================================================================================== NET ASSETS: Paid-in capital $21,410,589 Distributions in excess of net investment income (120,790) Accumulated net realized loss on investments, futures contracts, swap contracts, written options and swaptions and foreign currency transactions (1,452,747) Net unrealized depreciation on investments (27,313) Net unrealized depreciation on futures contracts (157,624) Net unrealized appreciation on swap contracts 69,903 Net unrealized appreciation on written options and written swaptions 8,365 Net unrealized depreciation on forward foreign currency contracts and other assets and liabilities denominated in foreign currencies (68,549) ------------------------------------------------------------------------------------- Total net assets $19,661,834 ===================================================================================== NET ASSET VALUE PER SHARE: (No par value, unlimited number of shares authorized) Class A (based on $7,014,607/765,843 shares) $ 9.16 Class C (based on $6,508,817/711,599 shares) $ 9.15 Class K (based on $9,521/1,037 shares) $ 9.18 Class Y (based on $6,128,889/669,261 shares) $ 9.16 MAXIMUM OFFERING PRICE: Class A ($9.16 (divided by) 95.5%) $ 9.59 ===================================================================================== * Represents restricted cash deposited at the counterparty for derivative contracts. The accompanying notes are an integral part of these financial statements. Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 27 Statement of Operations (unaudited) For the six months ended 2/29/16 INVESTMENT INCOME: Interest $ 18,371 ---------------------------------------------------------------------------------------------------- Total investment income $ 18,371 ---------------------------------------------------------------------------------------------------- EXPENSES: Management fees $ 60,465 Distribution fees Class A 9,061 Class C 33,021 Transfer agent fees Class A 421 Class C 360 Class K 5 Class Y 240 Shareholder communication expense 1,761 Administrative expense 12,098 Custodian fees 31,967 Registration fees 27,835 Professional fees 85,153 Printing expense 9,110 Fees and expenses of nonaffiliated Trustees 3,519 Pricing fees 35,503 Miscellaneous 2,655 ---------------------------------------------------------------------------------------------------- Total expenses $ 313,174 Less fees waived and expenses reimbursed by Pioneer Investment Management, Inc. (205,018) ---------------------------------------------------------------------------------------------------- Net expenses $ 108,156 ---------------------------------------------------------------------------------------------------- Net investment loss $ (89,785) ---------------------------------------------------------------------------------------------------- REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS, SWAP CONTRACTS, FUTURES CONTRACTS, WRITTEN OPTIONS AND WRITTEN SWAPTIONS AND FOREIGN CURRENCY TRANSACTIONS Net realized gain (loss) on: Investments $ (198,614) Swap contracts (291,398) Futures contracts (246,366) Written options and written swaptions 40,304 Forward foreign currency contracts and other assets and liabilities denominated in foreign currencies 114,042 $ (582,032) ---------------------------------------------------------------------------------------------------- Change in net unrealized appreciation (depreciation) on: Investments $ 179,782 Swap contracts 60,453 Futures contracts (217,039) Written options and written swaptions 25,150 Forward foreign currency contracts and other assets and liabilities denominated in foreign currencies 40,821 $ 89,167 ---------------------------------------------------------------------------------------------------- Net realized and unrealized gain (loss) on investments, swap contracts, futures contracts, written options and written swaptions and foreign currency transactions $ (492,865) ---------------------------------------------------------------------------------------------------- Net decrease in net assets resulting from operations $ (582,650) ==================================================================================================== The accompanying notes are an integral part of these financial statements. 28 Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 Statements of Changes in Net Assets ---------------------------------------------------------------------------------------------- Six Months Ended Year 2/29/16 Ended (unaudited) 8/31/15 ---------------------------------------------------------------------------------------------- FROM OPERATIONS: Net investment income (loss) $ (89,785) $ (162,466) Net realized gain (loss) on investments, swap contracts, futures contracts, written options and written swaptions and foreign currency transactions (582,032) 446,075 Change in net unrealized appreciation (depreciation) on investments, swap contracts, futures contracts, written options and written swaptions and foreign currency transactions 89,167 (584,032) ---------------------------------------------------------------------------------------------- Net decrease in net assets resulting from operations $ (582,650) $ (300,423) ---------------------------------------------------------------------------------------------- DISTRIBUTIONS TO SHAREOWNERS: Net investment income: Class A ($0.24 and $0.09 per share, respectively) $ (181,114) $ (58,842) Class C ($0.17 and $0.02 per share, respectively) (120,564) (13,546) Class K* ($0.25 and $0.00 per share, respectively) (261) -- Class Y ($0.27 and $0.11 per share, respectively) (180,482) (75,000) ---------------------------------------------------------------------------------------------- Total distributions to shareowners $ (482,421) $ (147,388) ---------------------------------------------------------------------------------------------- FROM FUND SHARE TRANSACTIONS:(a) Net proceeds from sale of shares $ 339,423 $ 2,868,119 Reinvestment of distributions 29,953 1,055 Cost of shares repurchased (490,762) (1,359,740) ---------------------------------------------------------------------------------------------- Net increase (decrease) in net assets resulting from Fund share transactions $ (121,386) $ 1,509,434 ---------------------------------------------------------------------------------------------- Net increase (decrease) in net assets $ (1,186,457) $ 1,061,623 NET ASSETS: Beginning of period 20,848,291 19,786,668 ---------------------------------------------------------------------------------------------- End of period $ 19,661,834 $20,848,291 ---------------------------------------------------------------------------------------------- Undistributed (distributions in excess of) net investment income $ (120,790) $ 451,416 ============================================================================================== (a) At February 29, 2016 PIM owned 93.2% of the value of the outstanding shares of Pioneer Absolute Return Bond Fund. * Class K shares commenced operations on December 31, 2014. The accompanying notes are an integral part of these financial statements. Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 29 Statements of Changes in Net Assets (continued) --------------------------------------------------------------------------------------- Six Months Six Months Ended Ended 2/29/16 2/29/16 Year Ended Year Ended Shares Amount 8/31/15 8/31/15 (unaudited) (unaudited) Shares Amount --------------------------------------------------------------------------------------- Class A Shares sold 25,625 $ 215,405 232,901 $ 2,278,455 Reinvestment of distributions 2,450 22,761 39 375 Less shares repurchased (42,083) (398,112) (121,682) (1,179,105) --------------------------------------------------------------------------------------- Net increase (decrease) (14,008) $ (159,946) 111,258 $ 1,099,725 ======================================================================================= Class C Shares sold 13,370 $ 123,518 56,774 $ 555,464 Reinvestment of distributions 701 6,512 70 680 Less shares repurchased (9,825) (92,143) (16,158) (156,514) --------------------------------------------------------------------------------------- Net increase 4,246 $ 37,887 40,686 $ 399,630 ======================================================================================= Class K* Shares sold -- $ -- 1,037 $ 10,000 Reinvestment of distributions -- -- -- -- Less shares repurchased -- -- -- -- --------------------------------------------------------------------------------------- Net increase -- $ -- 1,037 $ 10,000 ======================================================================================= Class Y Shares sold 54 $ 500 2,522 $ 24,200 Reinvestment of distributions 73 680 -- -- Less shares repurchased (55) (507) (2,429) (24,121) --------------------------------------------------------------------------------------- Net increase 72 $ 673 93 $ 79 ======================================================================================= * Class K shares commenced operations on December 31, 2014. The accompanying notes are an integral part of these financial statements. 30 Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 Financial Highlights ----------------------------------------------------------------------------------------- Six Months Ended Year 2/29/16 Ended 1/30/14 (unaudited) 8/31/15 to 8/31/14 ----------------------------------------------------------------------------------------- Class A Net asset value, beginning of period $ 9.67 $ 9.88 $ 10.00 ----------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) $ (0.03)(a) $ (0.03) $ (0.02) Net realized and unrealized gain (loss) on investments (0.24) (0.09) (0.10) ----------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ (0.27) $ (0.12) $ (0.12) ----------------------------------------------------------------------------------------- Distribution to shareowners: Net investment income $ (0.24) $ (0.09) $ -- ----------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ (0.51) $ (0.21) $ (0.12) ----------------------------------------------------------------------------------------- Net asset value, end of period $ 9.16 $ 9.67 $ 9.88 ========================================================================================= Total return* (2.85)% (1.24)% (1.20)%*** Ratio of net expenses to average net assets 0.93%** 1.03% 1.01%** Ratio of net investment income (loss) to average net assets (0.74)%** (0.58)% (0.29)%** Portfolio turnover rate 58%** 99% 62%** Net assets, end of period (in thousands) $ 7,015 $ 7,544 $ 6,606 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses to average net assets 2.96%** 2.98% 2.61%** Net investment income (loss) to average net assets (2.77)%** (2.53)% (1.89)%** ========================================================================================= * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period and no sales charges. Total return would be reduced if sales charges were taken into account. ** Annualized. *** Not annualized. (a) The per share data presented above is based on the average shares outstanding for the period presented. The accompanying notes are an integral part of these financial statements. Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 31 Financial Highlights (continued) --------------------------------------------------------------------------------------- Six Months Ended Year 2/29/16 Ended 1/30/14 (unaudited) 8/31/15 to 8/31/14 --------------------------------------------------------------------------------------- Class C Net asset value, beginning of period $ 9.63 $ 9.84 $ 10.00 --------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) $ (0.07)(a) $ (0.13) $ (0.06) Net realized and unrealized gain (loss) on investments (0.24) (0.06) (0.10) --------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ (0.31) $ (0.19) $ (0.16) --------------------------------------------------------------------------------------- Distribution to shareowners: Net investment income $ (0.17) $ (0.02) $ -- --------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ (0.48) $ (0.21) $ (0.16) --------------------------------------------------------------------------------------- Net asset value, end of period $ 9.15 $ 9.63 $ 9.84 ======================================================================================= Total return* (3.23)% (1.94)% (1.60)%*** Ratio of net expenses to average net assets 1.65%** 1.78% 1.75%** Ratio of net investment income (loss) to average net assets (1.47)%** (1.41)% (1.03)%** Portfolio turnover rate 58%** 99% 62%** Net assets, end of period (in thousands) $ 6,509 $ 6,810 $ 6,559 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses to average net assets 3.69%** 3.73% 3.35%** Net investment income (loss) to average net assets (3.51)%** (3.36)% (2.63)%** ======================================================================================= * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period and no sales charges. Total return would be reduced if sales charges were taken into account. ** Annualized. *** Not annualized. (a) The per share data presented above is based on the average shares outstanding for the period presented. The accompanying notes are an integral part of these financial statements. 32 Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 ---------------------------------------------------------------------------------------- Six Months Ended 2/29/16 12/31/14 (unaudited) to 8/31/15 ---------------------------------------------------------------------------------------- Class K Net asset value, beginning of period $ 9.70 $ 9.64 ---------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) $ (0.03)(b) $ (0.09) Net realized and unrealized gain (loss) on investments (0.24) 0.15(a) ---------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ (0.27) $ 0.06 ---------------------------------------------------------------------------------------- Distribution to shareowners: Net investment income $ (0.25) $ -- ---------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ (0.52) $ 0.06 ---------------------------------------------------------------------------------------- Net asset value, end of period $ 9.18 $ 9.70 ======================================================================================== Total return* (2.80)% 0.62%*** Ratio of net expenses to average net assets 0.75%** 0.75%** Ratio of net investment income (loss) to average net assets (0.57)%** (1.34)%** Portfolio turnover rate 58%** 99% Net assets, end of period (in thousands) $ 10 $ 10 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses to average net assets 2.78%** 2.70%** Net investment income (loss) to average net assets (2.60)%** (3.29)%** ======================================================================================== * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period. ** Annualized. *** Not annualized. (a) The amount shown for a share outstanding does not correspond with the aggregate loss on investments for the period due to the timing of sales and repurchases of shares in relation to fluctuating market values of the investments of the Fund. (b) The per share data presented above is based on the average shares outstanding for the period presented. The accompanying notes are an integral part of these financial statements. Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 33 Financial Highlights (continued) ----------------------------------------------------------------------------------------- Six Months Ended Year 2/29/16 Ended 1/30/14 (unaudited) 8/31/15 to 8/31/14 ----------------------------------------------------------------------------------------- Class Y Net asset value, beginning of period $ 9.69 $ 9.90 $ 10.00 ----------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) $ (0.02)(b) $ (0.04) $ (0.00)(a) Net realized and unrealized gain (loss) on investments (0.24) (0.06) (0.10) ----------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ (0.26) $ (0.10) $ (0.10) ----------------------------------------------------------------------------------------- Distribution to shareowners: Net investment income $ (0.27) $ (0.11) $ -- ----------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ (0.53) $ (0.21) $ (0.10) ----------------------------------------------------------------------------------------- Net asset value, end of period $ 9.16 $ 9.69 $ 9.90 ========================================================================================= Total return* (2.72)% (0.98)% (1.00)%*** Ratio of net expenses to average net assets 0.63%** 0.75% 0.75%** Ratio of net investment income (loss) to average net assets (0.45)%** (0.39)% (0.03)%** Portfolio turnover rate 58%** 99% 62%** Net assets, end of period (in thousands) $ 6,129 $ 6,485 $ 6,621 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses to average net assets 2.67%** 2.70% 2.36%** Net investment income (loss) to average net assets (2.49)%** (2.34)% (1.64)%** ========================================================================================= * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period. ** Annualized. *** Not annualized. (a) Amount rounds to less than $0.01 or $(0.01) per share. (b) The per share data presented above is based on the average shares outstanding for the period presented. The accompanying notes are an integral part of these financial statements. 34 Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 Notes to Financial Statements | 2/29/16 (unaudited) 1. Organization and Significant Accounting Policies Pioneer Absolute Return Bond Fund (the Fund) is one of five portfolios comprising Pioneer Series Trust V, a Delaware statutory trust. The Fund is registered under the Investment Company Act of 1940 as a diversified, open-end management investment company. The Fund's investment objective is to seek total return. The Fund offers four classes of shares designated as Class A, Class C, Class K and Class Y shares. Class A, Class C and Class Y shares commenced operations on January 30, 2014. Class K shares commenced operations on December 31, 2014. Each class of shares represents an interest in the same portfolio of investments of the Fund and has identical rights (based on relative net asset values) to assets and liquidation proceeds. Share classes can bear different rates of class-specific fees and expenses such as transfer agent and distribution fees. Differences in class-specific fees and expenses will result in differences in net investment income and, therefore, the payment of different dividends from net investment income earned by each class. The Amended and Restated Declaration of Trust of the Fund gives the Board the flexibility to specify either per-share voting or dollar-weighted voting when submitting matters for shareholder approval. Under per-share voting, each share of a class of the Fund is entitled to one vote. Under dollar-weighted voting, a shareholder's voting power is determined not by the number of shares owned, but by the dollar value of the shares on the record date. Each share class has exclusive voting rights with respect to matters affecting only that class, including with respect to the distribution plan for that class. There is no distribution plan for Class K or Class Y shares. The Fund's financial statements have been prepared in conformity with U.S. generally accepted accounting principles that require the management of the Fund to, among other things, make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of income, expenses and gains and losses on investments during the reporting period. Actual results could differ from those estimates. The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements: A. Security Valuation The net asset value of the Fund is computed once daily, on each day the New York Stock Exchange (NYSE) is open, as of the close of regular trading on the NYSE. Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 35 Fixed income securities are valued by using prices supplied by independent pricing services, which consider such factors as market prices, market events, quotations from one or more brokers, Treasury spreads, yields, maturities and ratings, or may use a pricing matrix or other fair value methods or techniques to provide an estimated value of the security or instrument. A pricing matrix is a means of valuing a debt security on the basis of current market prices for other debt securities, historical trading patterns in the market for fixed income securities and/or other factors. Valuations may be supplemented by dealers and other sources, as required. Non-U.S. debt securities that are listed on an exchange will be valued at the bid price obtained from an independent third party pricing service. Foreign securities are valued in U.S. dollars based on foreign currency exchange rate quotations supplied by a third party pricing service. Trading in non-U.S. equity securities is substantially completed each day at various times prior to the close of the NYSE. The values of such securities used in computing the net asset value of the Fund's shares are determined as of such times. The fund may use a fair value model developed by an independent pricing service to value non-U.S. equity securities. Swap contracts, including interest rate swaps, caps and floors (other than centrally cleared swap contracts) are valued at the dealer quotations obtained from reputable International Swap Dealer association members. Centrally cleared swaps are valued at the daily settlement price provided by the central clearing counterparty. Futures contracts are generally valued at the closing settlement price established by the exchange on which they are traded. Options contracts are generally valued at the mean between the last bid and ask prices on the principal exchange where they are traded. Over-the-counter ("OTC") options and options on swaps ("swaptions") are valued using prices supplied by independent pricing services, which consider such factors as market prices, market events, quotations from one or more brokers, Treasury spreads, yields, maturities and ratings, or may use a pricing matrix or other fair value methods or techniques to provide an estimated value of the security or instrument. Forward foreign currency exchange contracts are valued daily using the foreign exchange rate or, for longer term forward contract positions, the spot currency rate, in each case provided by a third party pricing service. Contracts whose forward settlement date falls between two quoted days are valued by interpolation. 36 Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 Securities for which independent pricing services are unable to supply prices or for which market prices and/or quotations are not readily available or are considered to be unreliable are valued by a fair valuation team comprised of certain personnel of Pioneer Investment Management, Inc. (PIM), the Fund's investment adviser, pursuant to procedures adopted by the Fund's Board of Trustees. PIM's fair valuation team uses fair value methods approved by the Valuation Committee of the Board of Trustees. PIM's fair valuation team is responsible for monitoring developments that may impact fair valued securities and for discussing and assessing fair values on an ongoing basis, and at least quarterly, with the Valuation Committee of the Board of Trustees. Inputs used when applying fair value methods to value a security may include credit ratings, the financial condition of the company, current market conditions and comparable securities. The Fund may use fair value methods if it is determined that a significant event has occurred after the close of the exchange or market on which the security trades and prior to the determination of the Fund's net asset value. Examples of a significant event might include political or economic news, corporate restructurings, natural disasters, terrorist activity or trading halts. Thus, the valuation of the Fund's securities may differ significantly from exchange prices and such differences could be material. At February 29, 2016, there were no securities valued using fair value methods (other than securities valued using prices supplied by independent pricing services, broker-dealers or using a third party insurance industry pricing model). B. Investment Income and Transactions Principal amounts of mortgage-backed securities are adjusted for monthly paydowns. Premiums and discounts related to certain mortgage-backed securities are amortized or accreted in proportion to the monthly paydowns. All discounts/premiums on purchase prices of debt securities are accreted/amortized for financial reporting purposes over the life of the respective securities, and such accretion/amortization is included in interest income. Dividend income is recorded on the ex-dividend date except that certain dividends from foreign securities where the ex-dividend date may have passed are recorded as soon as the Fund becomes aware of the ex-dividend data in the exercise of reasonable diligence. Interest income is recorded on the accrual basis. Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 37 Security transactions are recorded as of trade date. Gains and losses on sales of investments are calculated on the identified cost method for both financial reporting and federal income tax purposes. C. Foreign Currency Translation The books and records of the Fund are maintained in U.S. dollars. Amounts denominated in foreign currencies are translated into U.S. dollars using current exchange rates. Net realized gains and losses on foreign currency transactions, if any, represent, among other things, the net realized gains and losses on foreign currency contracts, disposition of foreign currencies and the difference between the amount of income accrued and the U.S. dollars actually received. Further, the effects of changes in foreign currency exchange rates on investments are not segregated in the statement of operations from the effects of changes in the market price of those securities but are included with the net realized and unrealized gain or loss on investments. D. Futures Contracts The Fund may enter into futures transactions in order to attempt to hedge against changes in interest rates, securities prices and currency exchange rates or to seek to increase total return. Futures contracts are types of derivatives. All futures contracts entered into by the Fund are traded on a futures exchange. Upon entering into a futures contract, the Fund is required to deposit with a broker an amount of cash or securities equal to the minimum "initial margin" requirements of the associated futures exchange. The amount of cash deposited with the broker as collateral at February 29, 2016 was $143,579 and is recorded within "Restricted Cash" on the Statement of Assets and Liabilities. Subsequent payments for futures contracts ("variation margin") are paid or received by the Fund, depending on the daily fluctuation in the value of the contracts, and are recorded by the Fund as unrealized appreciation or depreciation. When the contract is closed, the Fund realizes a gain or loss equal to the difference between the opening and closing value of the contract as well as any fluctuation in foreign currency exchange rates where applicable. The use of futures contracts involves, to varying degrees, elements of market, interest rate, currency exchange rate and counterparty risks, which may exceed the amount recognized by the Fund. Changes in value of the contracts may not directly correlate to the changes in value of the underlying securities. The average value of contracts open during the six months ended February 29, 2016 was $(4,547,698). 38 Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 At February 29, 2016, open futures contracts were as follows: -------------------------------------------------------------------------------------- Unrealized Contracts Settlement Appreciation/ Type Counterparty Long/(Short) Month/Year Value (Depreciation) -------------------------------------------------------------------------------------- Australia UBS AG 11 3/16 $ 1,035,159 $ 3,431 10 Yr Bond Euro BOBL UBS AG 7 3/16 1,016,375 11,096 Euro Bund UBS AG 8 3/16 1,451,245 9,837 U.S. 10 Yr UBS AG 4 3/16 523,625 412 Note U.S. 5 Yr UBS AG 15 6/16 1,814,766 (2,695) Note U.S. Ultra UBS AG 1 6/16 173,155 (1,648) Bond Australia UBS AG (35) 3/16 (2,808,862) (1,709) 3 Yr Bond Euro BUXL UBS AG (5) 3/16 (924,561) (73,554) 30 Yr Bond Euro OAT UBS AG (12) 3/16 (2,050,108) (84,157) Euro BTP UBS AG (25) 6/16 (3,770,390) (13,476) U.S. 10 Yr UBS AG (4) 3/16 (523,625) (5,161) Note -------------------------------------------------------------------------------------- Total $(4,063,221) $(157,624) ====================================================================================== E. Forward Foreign Currency Contracts The Fund may enter into forward foreign currency contracts (contracts) for the purchase or sale of a specific foreign currency at a fixed price on a future date. All contracts are marked to market daily at the applicable exchange rates, and any resulting unrealized appreciation or depreciation is recorded in the Fund's financial statements. The Fund records realized gains and losses at the time a contract is offset by entry into a closing transaction or extinguished by delivery of the currency. Risks may arise upon entering into these contracts from the potential inability of counterparties to meet the terms of the contract and from unanticipated movements in the value of foreign currencies relative to the U.S. dollar (see Note 5). F. Federal Income Taxes It is the Fund's policy to comply with the requirements of the Internal Revenue Code applicable to regulated investment companies and to distribute all of its net taxable income and net realized capital gains, if any, to its shareowners. Therefore, no federal income tax provision is required. As of August 31, 2015, the Fund did not accrue any interest or penalties with respect to uncertain tax positions, which, if applicable, would be recorded as an income tax expense in the Statement of Operations. Tax returns filed within the prior three years remain subject to examination by federal and state tax authorities. Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 39 The amount and character of income and capital gain distributions to shareowners are determined in accordance with federal income tax rules, which may differ from U.S. generally accepted accounting principles. Distributions in excess of net investment income or net realized gains are temporary overdistributions for financial statement purposes resulting from differences in the recognition or classification of income or distributions for financial statement and tax purposes. Capital accounts within the financial statements are adjusted for permanent book/tax differences to reflect tax character, but are not adjusted for temporary differences. The tax character of current year distributions payable will be determined at the end of the current taxable year. The tax character of distributions paid during the fiscal year ended August 31, 2015 was as follows: --------------------------------------------------------------------------- 2015 --------------------------------------------------------------------------- Distributions paid from: Ordinary income $147,388 --------------------------------------------------------------------------- Total $147,388 =========================================================================== The following shows the components of distributable earnings (losses) on a federal income tax basis at August 31, 2015: --------------------------------------------------------------------------- 2015 --------------------------------------------------------------------------- Distributable earnings: Undistributed ordinary income $ 362,041 Capital loss carryforward (838,466) Unrealized depreciation (207,259) --------------------------------------------------------------------------- Total $(683,684) =========================================================================== The difference between book-basis and tax-basis net unrealized depreciation is attributable to the tax adjustments relating to credit default swaps and the mark to market of futures contracts and credit default swaps. G. Fund Shares The Fund records sales and repurchases of its shares as of trade date. Pioneer Funds Distributor, Inc. (PFD), the principal underwriter for the Fund and a wholly owned indirect subsidiary of UniCredit S.p.A. (UniCredit), earned $576 in underwriting commissions on the sale of Class A shares during the six months ended February 29, 2016. H. Class Allocations Income, common expenses and realized and unrealized gains and losses are calculated at the Fund level and allocated daily to each class of shares based on its respective percentage of adjusted net assets at the beginning of the day. 40 Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 Distribution fees are calculated based on the average daily net asset value attributable to Class A and Class C shares of the Fund, respectively (see Note 4). Class K or Class Y shares do not pay distribution fees. All expenses and fees paid to the Fund's transfer agent, for its services are allocated among the classes of shares based on the number of accounts in each class and the ratable allocation of related out-of-pocket expenses (see Note 3). Distributions to shareowners are recorded as of the ex-dividend date. Distributions paid by the Fund with respect to each class of shares are calculated in the same manner and at the same time, except that net investment income dividends to Class A, Class C, Class K and Class Y shares can reflect different transfer agent and distribution expense rates. I. Risks Investing in foreign and/or emerging markets securities involves risks relating to interest rates, currency exchange rates and economic and political conditions. At times, the Fund's investments may represent industries or industry sectors that are interrelated or have common risks, making the Fund more susceptible to any economic, political, or regulatory developments or other risks affecting those industries and sectors. The Fund's prospectus contains unaudited information regarding the Fund's principal risks. Please refer to that document when considering the Fund's principal risks. J. Option Writing The Fund may write put and covered call options to seek to increase total return. When an option is written, the Fund receives a premium and becomes obligated to purchase or sell the underlying security at a fixed price upon the exercise of the option. When the Fund writes an option, an amount equal to the premium received by the Fund is recorded as a liability and is subsequently adjusted to the current value of the option written. Premiums received from writing options that expire unexercised are treated by the Fund on the expiration date as realized gains from investments. The difference between the premium and the amount paid on effecting a closing purchase transaction, including brokerage commissions, is also treated as a realized gain or, if the premium is less than the amount paid for the closing purchase transaction, as a realized loss. If a call option is exercised, the premium is added to the proceeds from the sale of the underlying security in determining whether the Fund has realized a gain or loss. The Fund as writer of an option bears the market risk of an unfavorable change in the price of the security underlying the written option. Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 41 The average value of written option contracts open during the six months ended February 29, 2016 was $(2,586). Written option contracts outstanding at February 29, 2016 are listed in the schedule of investments. The Fund held seven written options that were open at February 29, 2016. If the options were exercised at February 29, 2016, the maximum amount the Fund would have been required to pay was $5,426. Transactions in written options for the six months ended February 29, 2016 are summarized as follows: --------------------------------------------------------------------------- Number of Premiums Contracts Received --------------------------------------------------------------------------- Options open at beginning of period (210,000) $(3,339) Options opened (2,270,000) (7,295) Options exercised -- -- Options closed -- -- Options expired 1,440,000 5,208 --------------------------------------------------------------------------- Options open at end of period (1,040,000) $(5,426) =========================================================================== K. Purchased Options The Fund may purchase put and call options to seek increase total return. Purchased call and put options entitle the Fund to buy and sell a specified number of shares or units of a particular security, currency or index at a specified price at a specific date or within a specific period of time. Upon the purchase of a call or put option, the premium paid by the Fund is included in the Statement of Assets and Liabilities as an investment. All premiums are marked-to-market daily, and any unrealized gains or losses are recorded in the Fund's financial statements. As the purchaser of an index option, the Fund has the right to receive a cash payment equal to any depreciation in the value of the index below the strike price of the option (in the case of a put) or equal to any appreciation in the value of the index over the strike price of the option (in the case of a call) as of the valuation date of the option. Premiums paid for purchased calls and put options which have expired are treated as realized losses on investments in the Statement of Operations. Upon the exercise or closing of a purchased put option, the premium is offset against the proceeds on the sale of the underlying security or financial instrument in order to determine the realized gain or loss on investments. Upon the exercise or closing of a purchased call option, the premium is added to the cost of the security or financial instrument. The risk associated with purchasing options is limited to the premium originally paid. The average value of purchased options open during the six months ended February 29, 2016 was $39,993. Purchased option contracts outstanding at period end are listed within the Fund's schedule of investments. 42 Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 L. Written Interest Rate Swaptions The Fund may enter into interest rate swaptions to seek to manage exposure to fluctuations in interest rates or to seek to enhance yield. A swaption grants the right but not the obligation to enter into the underlying swap at a future specified date. When the Fund writes a swaption, the Fund receives a premium and becomes obligated to enter into a swap contract according to the terms of the underlying agreement. The premium received by the Fund is recorded as a liability and is subsequently adjusted to the current value of the written swaption. Premiums received from writing swaptions that expire unexercised are treated by the Fund on the expiration date as realized gains. The difference between the premium and the amount paid on effecting a closing purchase transaction, including brokerage commissions, is also treated as a realized gain or, if the premium is less than the amount paid for the closing purchase transaction, as a realized loss. If a written swaption is exercised, the cost basis of the swap is adjusted by the amount of premium received. The Fund as writer of a swaption bears the market risk of an unfavorable change in the price of the security underlying the written swaption. Open interest rate swaption contracts at February 29, 2016 are listed in the Schedule of Investments. The average value of written swaption contracts open during the six months ended February 29, 2016 was $(218,016). The Fund held three interest rate swaptions that were open at February 29, 2016. If the swaptions were exercised at February 29, 2016, the maximum amount the Fund would have been required to pay was $198,363. Transactions in interest rate swaptions for the six months ended February 29, 2016 are summarized as follows: --------------------------------------------------------------------------- Number of Premiums Contracts Received --------------------------------------------------------------------------- Options open at beginning of period (12,200,000) $ (325,169) Options opened (7,950,000) (11,177) Options exercised 5,000,000 95,475 Options closed -- -- Options expired 6,000,000 42,508 --------------------------------------------------------------------------- Options open at end of period (9,150,000) $ (198,363) =========================================================================== M. Purchased Interest Rate Swaptions The Fund may purchase put and call swaptions in order to attempt to hedge against changes in the value of portfolio securities or to seek to increase total return. Purchased call and put swaptions entitle the Fund to buy and sell a specified number of shares or units of a particular security, currency or index at a specified price at a specific date or within a specific period of time. Upon Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 43 the purchase of a call or put swaption, the premium paid by the Fund is included in the Statement of Assets and Liabilities as an investment. All premiums are marked-to-market daily, and any unrealized gains or losses are recorded in the Fund's financial statements. As the purchaser of an index swaption, the Fund has the right to receive a cash payment equal to any depreciation in the value of the index below the strike price of the swaption (in the case of a put) or equal to any appreciation in the value of the index over the strike price of the swaption (in the case of a call) as of the valuation date of the swaption. Premiums paid for purchased calls and put swaptions which have expired are treated as realized losses on investments in the Statement of Operations. Upon the exercise or closing of a purchased put swaption, the premium is offset against the proceeds on the sale of the underlying security or financial instrument in order to determine the realized gain or loss on investments. Upon the exercise or closing of a purchased call swaption, the premium is added to the cost of the security or financial instrument. The risk associated with purchasing swaptions is limited to the premium originally paid. The average value of contracts open during the six months ended February 29, 2016 was $414,923. Purchased swaptions open at period end are listed at the end of the Fund's Schedule of Investments. N. Credit Default Swaption Writing The Fund may write put and covered call swaptions on portfolio securities in order to attempt to hedge against changes in the value of portfolio securities or to seek to increase total return. When a swaption is written, the Fund receives a premium and becomes obligated to purchase or sell the underlying security at a fixed price upon the exercise of the swaption. When the Fund writes a swaption, an amount equal to the premium received by the Fund is recorded as a liability and is subsequently adjusted to the current value of the swaption written. Premiums received from writing swaptions that expire unexercised are treated by the Fund on the expiration date as realized gains from investments. The difference between the premium and the amount paid on effecting a closing purchase transaction, including brokerage commissions, is also treated as a realized gain or, if the premium is less than the amount paid for the closing purchase transaction, as a realized loss. If a call swaption is exercised, the premium is added to the proceeds from the sale of the underlying security in determining whether the Fund has realized a gain or loss. The Fund as writer of a swaption bears the market risk of an unfavorable change in the price of the security underlying the written swaption. The Fund had no outstanding written credit default swaption contracts at February 29, 2016. The average value of written swaption contracts open during the six months ended February 29, 2016 was $(153). 44 Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 Transactions in written swaptions for the six months ended February 29, 2016 are summarized as follows: --------------------------------------------------------------------------- Number of Premiums Contracts Received --------------------------------------------------------------------------- Options outstanding at beginning of period -- $ -- Options opened (6,000,000) (3,900) Options exercised -- -- Options closed -- -- Options expired 6,000,000 3,900 --------------------------------------------------------------------------- Options outstanding at end of period -- $ -- =========================================================================== O. Credit Default Swaption Purchased The Fund may purchase put and call swaptions in order to attempt to hedge against changes in the value of portfolio securities or to seek to increase total return. Purchased call and put swaptions entitle the Fund to buy and sell a specified number of shares or units of a particular security, currency or index at a specified price at a specific date or within a specific period of time. Upon the purchase of a call or put swaption, the premium paid by the Fund is included in the Statement of Assets and Liabilities as an investment. All premiums are marked-to-market daily, and any unrealized gains or losses are recorded in the Fund's financial statements. As the purchaser of an index swaption, the Fund has the right to receive a cash payment equal to any depreciation in the value of the index below the strike price of the swaption (in the case of a put) or equal to any appreciation in the value of the index over the strike price of the swaption (in the case of a call) as of the valuation date of the swaption. Premiums paid for purchased calls and put swaptions which have expired are treated as realized losses on investments in the Statement of Operations. Upon the exercise or closing of a purchased put swaption, the premium is offset against the proceeds on the sale of the underlying security or financial instrument in order to determine the realized gain or loss on investments. Upon the exercise or closing of a purchased call swaption, the premium is added to the cost of the security or financial instrument. The risk associated with purchasing swaptions is limited to the premium originally paid. The average value of contracts open during the six months ended February 29, 2016 was $25,512. There were no outstanding purchased credit default swaptions open at February 29, 2016. P. Credit Default Swap Agreements A credit default swap is a contract between a buyer of protection and a seller of protection against a pre-defined credit event. The Fund may sell or buy credit default swap contracts to seek to increase the Fund's income, or to Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 45 attempt to hedge the risk of default on Fund securities. A credit default swap index is used to hedge risk or take a position on a basket of credit entities or indices. As a seller of protection, the Fund would be required to pay the notional (or other agreed-upon) value of the referenced debt obligation to the counterparty in the event of a default by a U.S. or foreign corporate issuer of a debt obligation, which would likely result in a loss to the Fund. In return, the Fund would receive from the counterparty a periodic stream of payments during the term of the contract provided that no event of default occurred. The maximum exposure of loss to the seller would be the notional value of the credit default swaps outstanding. If no default occurs, the Fund would keep the stream of payments and would have no payment obligation. The Fund may also buy credit default swap contracts in order to hedge against the risk of default of debt securities, in which case the Fund would function as the counterparty referenced above. When the Fund enters into a credit default swap contract, the protection buyer makes an upfront or periodic payment to the protection seller in exchange for the rights to receive a contingent payment. An upfront payment made by the Fund, as the protection buyer, is recorded as an asset in the Statement of Assets and Liabilities. Periodic payments received or paid by the Fund are recorded as realized gains or losses in the Statement of Operations. Credit default swap contracts are marked-to-market daily using valuations supplied by independent sources and the change in value, if any, is recorded as unrealized appreciation or depreciation in the Statement of Assets and Liabilities. Payments received or made as a result of a credit event or upon termination of the contract are recognized, net of the appropriate amount of the upfront payment, as realized gains or losses in the Statement of Operations. Certain swap contracts that are cleared through a central clearinghouse are referred to as centrally cleared swaps. All payments made or received by the Fund are pursuant to a centrally cleared swap contract with the central clearing party rather than the original counterparty. Upon entering into a centrally cleared swap contract, the Fund is required to make an initial margin deposit, either in cash or in securities. The daily change in value on open centrally cleared contracts is recorded as variation margin on centrally cleared swaps on the Statement of Assets and Liabilities. The amount of cash deposited with a broker as collateral at February 29, 2016 was $508,985 and is recorded within "Restricted Cash" on the Statement of Assets and Liabilities. 46 Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 Credit default swap contracts involving the sale of protection may involve greater risks than if the Fund had invested in the referenced debt instrument directly. Credit default swap contracts are subject to general market risk, liquidity risk, counterparty risk and credit risk. If the Fund is a protection buyer and no credit event occurs, it will lose its investment. If the Fund is a protection seller and a credit event occurs, the value of the referenced debt instrument received by the Fund, together with the periodic payments received, may be less than the amount the Fund pays to the protection buyer, resulting in a loss to the Fund. Open credit default swap contracts at February 29, 2016 are listed in the Schedule of Investments. The average value of credit default swap contracts open during the six months ended February 29, 2016 was $14,432. Q. Cross Currency Swap Contracts The Fund may enter into a cross currency swap contract to attempt to manage and/or gain exposure to fluctuations in interest and/or currency exchange rates. When entering into a cross currency swap contract, the Fund negotiates with the counterparty to exchange a periodic stream of payments (determined using fixed or floating rates) based on the notional amount of two different currencies. The notional amounts are typically determined based on exchange rates at the opening of the contract. Cross currency swap contracts are marked-to-market daily using valuations supplied by independent sources and the change in value, if any, is recorded as unrealized appreciation or depreciation in the Statement of Assets and Liabilities. Payments received or made under the contract or upon termination of the contract are recognized, net of the appropriate amount of any upfront payment, as realized gains or losses in the Statement of Operations. Cross currency swaps are subject to counterparty risk. Open cross currency swap contracts at February 29, 2016 or listed in the Schedule of Investments. The average value of cross currency swap contracts open during the six months ended February 29, 2016 was $778. R. Inflation Rate Swap Contracts The Fund may enter into inflation rate swap contracts to attempt to hedge against inflation. Pursuant to the inflation rate swap agreement, the Fund negotiates with a counterparty to exchange a periodic stream of payments, based on a benchmark inflation index. One cash flow stream will typically be a floating rate payment linked to the specified inflation index while the other is typically a fixed interest rate. Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 47 Inflation rate swap contracts are marked-to-market daily using valuations supplied by independent sources and the change in value, if any, is recorded as unrealized appreciation or depreciation in the Statement of Assets and Liabilities. Inflation rate swaps are normally issued on a zero coupon basis where all payments compound during the life of the contract and are netted upon the termination or maturity of the contract. Final payments received or paid by the Fund are recorded as realized gains or losses in the Statement of Operations. Inflation rate swap contracts are subject to movements in interest rates. Open inflation rated swap contracts at February 29, 2016 are listed in the Schedule of Investments. The average value of inflation rate swap contracts open during the six months ended February 29, 2016 was $61,925. S. Interest Rate Swap Contracts The Fund may enter into interest rate swaps to attempt to hedge against interest rate fluctuations or to enhance its income. Pursuant to the interest rate swap agreement, the Fund negotiates with a counterparty to exchange a periodic stream of payments based on a benchmark interest rate. One cash flow stream will typically be a floating rate payment based upon the specified floating benchmark interest rate while the other is typically a fixed interest rate. Payment flows are usually netted against each other, with the difference being paid by one party to the other on a monthly basis. Periodic payments received or paid by the Fund are recorded as realized gains or losses in the Statement of Operations. Interest rate swap contracts are marked-to-market daily using valuations supplied by independent sources and the change in value, if any, is recorded as unrealized appreciation or depreciation in the Statement of Assets and Liabilities. Interest rate swap contracts are subject to counterparty risk and movements in interest rates. Open interest rate swap contracts at February 29, 2016 are listed in the Schedule of Investments. The average value of interest swap contracts open during the six months ended February 29, 2016 was $1,319. 2. Management Agreement PIM, a wholly owned indirect subsidiary of UniCredit, manages the Fund's portfolio. Management fees are calculated daily at an annual rate of 0.60% of the average daily net assets of the Fund. PIM has contractually agreed to limit ordinary operating expenses (ordinary operating expenses means all fund expenses other than extraordinary expenses, such as litigation, taxes, brokerage commissions and acquired fund fees and expenses) to the extent required to reduce Fund expenses to 1.15%, 1.90%, 0.75% and 0.75% of the average daily net assets attributable to Class A, Class C, Class K and Class Y shares, respectively. These expense limitations are 48 Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 in effect through January 1, 2017. Fees waived and expenses reimbursed during the six months ended February 29, 2016 are reflected on the Statement of Operations. Fees and expenses of other investment companies in which the Fund may invest are not included in the expense limitations noted above. There can be no assurance that PIM will extend the expense limitation agreement for a class of shares beyond the date referred to above. In addition, under the management and administration agreements, certain other services and costs, including accounting, regulatory reporting and insurance premiums, are paid by the Fund as administrative reimbursements. Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $10,695 in management fees, administrative costs and certain other reimbursements payable to PIM at February 29, 2016. 3. Transfer Agent Prior to November 2, 2015, Pioneer Investment Management Shareholder Services, Inc. (PIMSS), a wholly owned indirect subsidiary of UniCredit, provided substantially all transfer agent and shareowner services to the Fund at negotiated rates. Effective November 2, 2015, Boston Financial Data Services serves as the transfer agent to the Fund at negotiated rates. In addition, the Fund reimbursed the transfer agent for out-of-pocket expenses incurred by the transfer agent related to shareholder communications activities such as proxy and statement mailings, outgoing phone calls and omnibus relationship contracts. For the six months ended February 29, 2016, such out-of-pocket expenses by class of shares were as follows: -------------------------------------------------------------------------------- Shareholder Communications: -------------------------------------------------------------------------------- Class A $ 1,497 Class C 297 Class Y (33) -------------------------------------------------------------------------------- Total $ 1,761 ================================================================================ Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $593 in transfer agent fees and out-of-pocket reimbursements payable to the transfer agent at February 29, 2016. 4. Distribution Plan The Fund has adopted a Distribution Plan pursuant to Rule 12b-1 of the Investment Company Act of 1940 with respect to its Class A and Class C shares. Pursuant to the Plan, the Fund pays PFD 0.25% of the average daily net assets attributable to Class A shares as compensation for personal services Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 49 and/or account maintenance services or distribution services with regard to Class A shares. Pursuant to the Plan, the Fund also pays PFD 1.00% of the average daily net assets attributable to Class C shares. The fee for Class C shares consists of a 0.25% service fee and a 0.75% distribution fee paid as compensation for personal services and/or account maintenance services or distribution services with regard to Class C shares. Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $905 in distribution fees payable to PFD at February 29, 2016. In addition, redemptions of each class of shares (except Class K or Class Y shares) may be subject to a contingent deferred sales charge (CDSC). A CDSC of 1.00% may be imposed on redemptions of certain net asset value purchases of Class A shares within 12 months of purchase. Redemptions of Class C shares within 12 months of purchase are subject to a CDSC of 1.00%, based on the lower of cost or market value of shares being redeemed. Shares purchased as part of an exchange remain subject to any CDSC that applied to the original purchase of those shares. There is no CDSC for Class K or Class Y shares. Proceeds from the CDSCs are paid to PFD. For the six months ended February 29, 2016, no CDSCs were paid to PFD. 5. Forward Foreign Currency Contracts At February 29, 2016, the Fund had entered into various forward foreign currency contracts that obligate the Fund to deliver or take delivery of currencies at specified future maturity dates. Alternatively, prior to the settlement date of a forward foreign currency contract, the Fund may close out such contract by entering into an offsetting contract. The average value of forward foreign currency contracts open during the six months ended February 29, 2016 was $(4,989,681). --------------------------------------------------------------------------------------------------------------- In Currency Currency Exchange Settlement Unrealized Sold Deliver Purchased for Counterparty Date Appreciation --------------------------------------------------------------------------------------------------------------- (CNY) Chinese (4,873,310) USD 760,000 Morgan Stanley 3/7/16 $ 16,617 Yuan Capital Services Renminbi LLC (KRW) South (165,413,500) USD 140,000 Morgan Stanley 3/2/16 6,537 Korean Won Capital Services LLC (KRW) South (248,172,610) USD 205,440 Morgan Stanley 3/2/16 5,203 Korean Won Capital Services LLC (KRW) South (78,855,000) USD 63,830 Barclays Bank Plc 3/2/16 206 Korean Won (RUB) Russian (1,717,200) USD 24,000 Morgan Stanley 3/14/16 1,245 Ruble Capital Services LLC 50 Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 --------------------------------------------------------------------------------------------------------------- In Currency Currency Exchange Settlement Unrealized Sold Deliver Purchased for Counterparty Date Appreciation --------------------------------------------------------------------------------------------------------------- USD (207,000) (CAD) 297,418 Morgan Stanley 4/14/16 $ 13,032 Canadian Capital Services Dollar) LLC (EUR) Euro (6,400,142) USD 7,003,783 Morgan Stanley 4/14/16 24,637 Capital Services LLC (PLN) Polish (470,000) (HUF) 33,735,643 Morgan Stanley 4/14/16 796 Zloty Hungarian Capital Services Forint LLC (HUF) (33,166,949) (PLN) Polish 470,000 Morgan Stanley 4/14/16 1,201 Hungarian Zloty Capital Services Forint LLC USD (960,356) (JPY) 111,665,735 Morgan Stanley 4/14/16 31,070 Japanese Capital Services Yen LLC USD (312,476) (AUD) 440,000 Morgan Stanley 4/14/16 956 Austrialian Capital Services Dollar LLC USD (190,000) (PLN) Polish 778,280 Morgan Stanley 4/14/16 4,854 Zloty Capital Services LLC (PLN) Polish (129,764) (EUR) Euro 30,000 Morgan Stanley 4/14/16 226 Zloty Capital Services LLC (EUR) Euro (30,000) (PLN) Polish 133,565 Morgan Stanley 4/14/16 726 Zloty Capital Services LLC (GBP) British (148,950) (EUR) Euro 197,011 Morgan Stanley 4/14/16 7,426 Pound Sterling Capital Services LLC (GBP) British (80,000) (NZD) New 175,885 Morgan Stanley 4/14/16 4,153 Pound Sterling Zealand Capital Services Dollar LLC USD (116,226) (NZD) New 180,000 Credit Suisse 4/14/16 2,029 Zealand International Dollar USD (267,077) (NOK) 2,372,000 Morgan Stanley 4/14/16 5,618 Norwegian Capital Services Krone LLC (GBP) British (160,000) USD 228,451 Morgan Stanley 4/14/16 5,656 Pound Sterling Capital Services LLC (SGD) (111,865) USD 80,000 Morgan Stanley 4/14/16 541 Singapore Capital Services Dollar LLC USD (80,000) (SGD) 114,967 Morgan Stanley 4/14/16 1,663 Singapore Capital Services Dollar LLC (INR) Indian (6,425,934) USD 94,000 Morgan Stanley 4/13/16 610 Rupee Capital Services LLC Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 51 --------------------------------------------------------------------------------------------------------------- In Currency Currency Exchange Settlement Unrealized Sold Deliver Purchased for Counterparty Date Appreciation --------------------------------------------------------------------------------------------------------------- (EUR) Euro (180,000) (AUD) 285,359 Morgan Stanley 4/14/16 $ 6,991 Austrialian Capital Services Dollar LLC USD (70,000) (RUB) 5,548,670 Goldman Sachs 3/11/16 3,585 Russian International Ruble USD (24,000) (RUB) 1,936,080 Morgan Stanley 3/14/16 1,656 Russian Capital Services Ruble LLC (KRW) South (97,708,000) USD 80,000 Morgan Stanley 5/6/16 1,288 Korean Won Capital Services LLC (GBP) British (40,000) (JPY) 6,485,145 Morgan Stanley 4/14/16 1,880 Pound Sterling Japanese Capital Services Yen LLC (EUR) Euro (65,196) (JPY) 8,350,000 Credit Suisse 4/14/16 3,041 Japanese International Yen (EUR) Euro (100,000) (NOK) 963,119 Morgan Stanley 4/14/16 1,677 Norwegian Capital Services Krone LLC (MYR) (505,110) USD 120,000 Barclays Bank Plc 2/10/17 2,055 Malaysian Ringgit (NZD) New (171,569) (AUD) 160,000 Morgan Stanley 4/14/16 1,260 Zealand Austrialian Capital Services Dollar Dollar LLC USD (23,000) (INR) Indian 1,591,370 Goldman Sachs 4/13/16 128 Rupee International (ZAR) South (1,234,349) USD 80,000 Barclays Bank Plc 4/14/16 2,851 African Rand (ZAR) South (952,093) USD 60,000 Morgan Stanley 4/14/16 492 African Rand Capital Services LLC --------------------------------------------------------------------------------------------------------------- Total $ 161,906 =============================================================================================================== 52 Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 --------------------------------------------------------------------------------------------------------------- In Currency Currency Exchange Settlement Unrealized Sold Deliver Purchased for Counterparty Date Depreciation --------------------------------------------------------------------------------------------------------------- USD (380,000) (CNY) 2,364,360 Barclays Bank Plc 3/7/16 $ (19,337) Chinese Yuan Renminbi USD (380,000) (CNY) 2,363,220 Credit Suisse 3/7/16 (19,511) Chinese International Yuan Renminbi USD (140,000) (KRW) 167,322,400 Morgan Stanley 3/2/16 (4,998) South Capital Services Korean Won LLC USD (199,339) (KRW) 246,263,710 Morgan Stanley 3/2/16 (644) South Capital Services Korean Won LLC USD (70,000) (KRW) 78,855,000 Barclays Bank Plc 3/2/16 (6,377) South Korean Won (NZD) New (1,188,242) (EUR) Euro 696,000 Morgan Stanley 4/14/16 (21,674) Zealand Capital Services Dollar LLC (EUR) Euro (611,000) (NZD) New 1,008,802 Morgan Stanley 4/14/16 (3,521) Zealand Capital Services Dollar LLC (CAD) (452,508) USD 327,000 Morgan Stanley 4/14/16 (7,770) Canadian Capital Services Dollar) LLC USD (5,982,164) (EUR) Euro 5,479,810 Morgan Stanley 4/14/16 (6,611) Capital Services LLC (JPY) (181,557,508) USD 1,549,905 Morgan Stanley 4/14/16 (62,057) Japanese Yen Capital Services LLC USD (16,736) (NZD) New 25,000 Morgan Stanley 4/14/16 (312) Zealand Capital Services Dollar LLC (NZD) New (180,000) USD 118,229 Morgan Stanley 4/14/16 (26) Zealand Capital Services Dollar LLC (AUD) (170,000) USD 119,187 Morgan Stanley 4/14/16 (1,912) Austrialian Capital Services Dollar LLC (PLN) Polish (1,080,050) USD 270,000 Morgan Stanley 4/14/16 (406) Zloty Capital Services LLC (EUR) Euro (238,729) (GBP) British 180,697 Morgan Stanley 4/14/16 (8,710) Pound Capital Services Sterling LLC (NZD) New (177,768) (GBP) British 80,000 Morgan Stanley 4/14/16 (5,390) Zealand Dollar Pound Capital Services Sterling LLC Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 53 --------------------------------------------------------------------------------------------------------------- In Currency Currency Exchange Settlement Unrealized Sold Deliver Purchased for Counterparty Date Depreciation --------------------------------------------------------------------------------------------------------------- (NOK) (258,968) (GBP) British 20,000 Morgan Stanley 4/14/16 $ (1,923) Norwegian Pound Capital Services Krone Sterling LLC (NOK) (5,365,000) USD 605,180 Morgan Stanley 4/14/16 (11,601) Norwegian Capital Services Krone LLC USD (42,529) (HKD) Hong 330,000 Morgan Stanley 4/14/16 (92) Kong Dollar Capital Services LLC USD (365,261) (GBP) British 252,669 Morgan Stanley 4/14/16 (13,426) Pound Capital Services Sterling LLC (SEK) (247,407) (GBP) British 20,000 Morgan Stanley 4/14/16 (1,113) Swedish Pound Capital Services Krona Sterling LLC (BRL) (389,395) USD 94,000 Morgan Stanley 4/11/16 (2,168) Brazilian Real Capital Services LLC USD (94,000) (BRL) 379,788 Morgan Stanley 4/11/16 (204) Brazilian Real Capital Services LLC USD (80,000) (MXN) 1,432,416 Credit Suisse 4/14/16 (1,206) Mexican Peso International (RUB) (5,410,510) USD 70,000 Morgan Stanley 3/11/16 (1,753) Russian Capital Services Ruble LLC USD (47,000) (INR) Indian 3,230,310 Morgan Stanley 4/13/16 (53) Rupee Capital Services LLC (AUD) (289,329) (EUR) Euro 180,000 Morgan Stanley 4/14/16 (9,818) Austrialian Capital Services Dollar LLC (MXN) (1,484,619) USD 80,000 Morgan Stanley 4/14/16 (1,666) Mexican Peso Capital Services LLC (CNY) Chinese (410,460) USD 60,000 Goldman Sachs 11/3/16 (2,135) Yuan International Renminbi USD (120,000) (MYR) 498,600 Morgan Stanley 2/10/17 (3,575) Malaysian Capital Services Ringgit LLC (JPY) (6,520,100) (AUD) 80,000 Morgan Stanley 4/14/16 (901) Japanese Yen Austrialian Capital Services Dollar LLC (JPY) (6,642,690) (GBP) British 40,000 Morgan Stanley 4/14/16 (3,278) Japanese Yen Pound Sterling Capital Services LLC (AUD) (80,000) (JPY) 6,284,376 Credit Suisse 4/14/16 (1,192) Austrialian Japanese International Dollar Yen 54 Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 --------------------------------------------------------------------------------------------------------------- In Currency Currency Exchange Settlement Unrealized Sold Deliver Purchased for Counterparty Date Depreciation --------------------------------------------------------------------------------------------------------------- (CNY) Chinese (534,200) USD 80,000 Morgan Stanley 8/25/16 $ (1,004) Yuan Capital Services Renminbi LLC USD (80,000) (CLP) 56,680,000 Morgan Stanley 8/25/16 (162) Chilean Capital Services Peso LLC (NOK) (476,365) (EUR) Euro 50,000 Goldman Sachs 4/14/16 (241) Norwegian International Krone --------------------------------------------------------------------------------------------------------------- Total $(226,767) =============================================================================================================== 6. Assets and Liabilities Offsetting The Fund has entered into an International Swaps and Derivatives Association, Inc. Master Agreement ("ISDA Master Agreement") or similar agreement with substantially all its derivative counterparties. An ISDA Master Agreement is a bilateral agreement between the Fund and a counterparty that governs the trading of certain OTC derivatives and typically contains, among other things, close-out and set-off provisions which apply upon the occurrence of event of a default and/or termination event as defined under the relevant ISDA Master Agreement. The ISDA Master Agreement may also give a party the right to terminate all transactions traded under such agreement if, among other things, there is deterioration in the credit quality of the other party. Upon an event of default or a termination of the ISDA Master Agreement, the non-defaulting party has the right to close out all transactions under such agreement and to net amounts owed under each transaction to determine one net amount payable by one party to the other. The right to close out and net payments across all transactions under the ISDA Master Agreement could result in a reduction of the Fund's credit risk to its counterparty equal to any amounts payable by the Fund under the applicable transactions, if any. However, the Fund's right to setoff may be restricted or prohibited by the bankruptcy or insolvency laws of the particular jurisdiction to which a specific ISDA counterparty is subject. The collateral requirements for derivatives transactions under an ISDA Master Agreement are governed by a credit support annex to the ISDA Master Agreement. Collateral requirements are generally determined at the close of business each day and are typically based on changes in market values for each transaction under an ISDA Master Agreement and netted into one amount for such agreement. Generally, the amount of collateral due from or to a counterparty is subject to threshold (a "minimum transfer amount") before a transfer is required, which may vary by counterparty. Collateral pledged for the benefit of the Fund and/or counterparty is held in segregated accounts by the Fund's custodian and cannot be sold, re-pledged, assigned or otherwise Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 55 used while pledged. Cash that has been segregated to cover the Fund's collateral obligations, if any, will be reported separately in the Statement of Assets and Liabilities as "Restricted cash." Securities pledged by the Fund as collateral, if any, are identified as such in the Schedule of Investments. Financial instruments subject to an enforceable master netting agreement such as an ISDA Master Agreement have been offset on the Statement of Assets and Liabilities. The following charts show gross assets and liabilities of the Fund as of February 29 2016. ---------------------------------------------------------------------------------------------------- Derivative Assets Subject to Derivatives Non-Cash Cash Net Amount Master Netting Available Collateral Collateral of Derivative Counterparty Agreement for Offset Received (a) Received (a) Assets (b) ---------------------------------------------------------------------------------------------------- Barclays Bank Plc $ 35,637 $ (35,637) $ -- $ -- $ -- Credit Suisse International 55,967 (21,909) -- -- 34,058 Goldman Sachs International 73,600 (73,600) -- -- -- Deutsche Bank AG 635,720 (614,316) -- -- 21,404 Morgan Stanley Capital Services LLC 195,725 (195,725) -- -- -- ---------------------------------------------------------------------------------------------------- Total $ 996,649 $ (941,187) $ -- $ -- $ 55,462 ==================================================================================================== ---------------------------------------------------------------------------------------------------- Derivative Liabilities Subject to Derivatives Non-Cash Cash Net Amount Master Netting Available Collateral Collateral of Derivative Counterparty Agreement for Offset Pledged (a) Pledged (a) Assets (c) ---------------------------------------------------------------------------------------------------- Barclays Bank Plc $ (36,683) $ 35,637 $ -- $ -- $ (1,046) Credit Suisse International (21,909) 21,909 -- Goldman Sachs International (79,223) 73,600 (5,623) Deutsche Bank AG (614,316) 614,316 -- -- -- Morgan Stanley Capital Services LLC (228,794) 195,725 -- -- (33,069) ---------------------------------------------------------------------------------------------------- Total $ (980,925) $ 941,187 $ -- $ -- $ (39,738) ==================================================================================================== (a) The amount presented here may be less than the total amount of collateral received/pledged as the net amount of derivative assets and liabilities cannot be less than $0. (b) Represents the net amount due from the counterparty in the event of default. (c) Represents the net amount payable to the counterparty in the event of default. 56 Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 7. Additional Disclosures about Derivative Instruments and Hedging Activities: The Fund's use of derivatives subjects it to the following risks: Interest rate risk relates to the fluctuations in the value of interest-bearing securities due to changes in the prevailing levels of market interest rates. Credit risk relates to the ability of the issuer of a financial instrument to make further principal or interest payments on an obligation or commitment that it has to the Fund. Foreign exchange rate risk relates to fluctuations in the value of an asset or liability due to changes in currency exchange rates. Equity risk relates to the fluctuations in the value of financial instruments as a result of changes in market prices (other than those arising from interest rate risk or foreign exchange risk), whether caused by factors specific to an individual investment, its issuer, or all factors affecting all instruments traded in a market or market segment. Commodity risk relates to the risk that the value of a commodity or commodity index will fluctuate based on increases or decreases in the commodities market and factors specific to a particular industry or commodity. The fair value of open derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) by risk exposure at February 29, 2016 was as follows: ---------------------------------------------------------------------------------------- Statement of Foreign Assets and Interest Credit Exchange Equity Commodity Liabilities Rate Risk Risk Rate Risk Risk Risk ---------------------------------------------------------------------------------------- Assets Unrealized appreciation of forward foreign currency contracts $ -- $ -- $ 161,906 $ -- $ -- Net unrealized appreciation of swap contracts 91,554 (10,682) (10,969) -- -- ---------------------------------------------------------------------------------------- Total Value $ 91,554 $ (10,682) $ 150,937 $ -- $ -- ======================================================================================== Liabilities Unrealized depreciation of forward foreign currency contracts $ -- $ -- $ (226,767) $ -- $ -- Net unrealized depreciation on futures contracts (157,624) -- -- -- -- Written options and written swaptions (191,763) -- (3,661) -- -- ---------------------------------------------------------------------------------------- Total Value $ (349,387) $ -- $ (230,428) $ -- $ -- ======================================================================================== Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 57 The effect of derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) on the Statement of Operations by risk exposure at February 29, 2016 was as follows: ---------------------------------------------------------------------------------------- Foreign Statement of Interest Credit Exchange Equity Commodity Operations Rate Risk Risk Rate Risk Risk Risk ---------------------------------------------------------------------------------------- Net realized gain (loss) on Swap contracts $ (272,374) $ (19,024) $ -- $ -- $ -- Futures contracts (246,366) -- -- -- -- Written options and written swaptions 35,096 -- 5,208 -- -- Forward foreign currency contracts* -- -- 122,438 -- -- ---------------------------------------------------------------------------------------- Total Value $ (483,644) $ (19,024) $ 127,646 $ -- $ -- ======================================================================================== Change in net unrealized appreciation (depreciation) on Swap contracts $ 91,074 $ (19,652) $ (10,969) $ -- $ -- Futures contracts (217,039) -- -- -- -- Written options and written swaptions 23,301 -- 1,849 -- -- Forward foreign currency contracts* -- -- 42,441 -- -- ---------------------------------------------------------------------------------------- Total Value $ (102,664) $ (19,652) $ 33,321 $ -- $ -- ======================================================================================== * Included in the amount shown on the Statement of Operations as foward foreign currency contracts and other assets and liabilities denominated in foreign currencies. 58 Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 Additional Information (unaudited) Pioneer Investment Management, Inc. (the "Adviser"), each fund's investment adviser, is currently an indirect, wholly owned subsidiary of UniCredit S.p.A. ("UniCredit"). On November 11, 2015, UniCredit announced that it signed a binding master agreement with Banco Santander and affiliates of Warburg Pincus and General Atlantic (the "Private Equity Firms") with respect to Pioneer Investments ("Pioneer") and Santander Asset Management ("SAM") (the "Transaction"). The Transaction, as previously announced by UniCredit, will establish a holding company, with the name Pioneer Investments, to be owned by UniCredit (50%) and the Private Equity Firms (50% between them). The holding company will control Pioneer's U.S. operations, including PIM. The holding company also will own 66.7% of Pioneer's and SAM's combined operations outside the U.S., while Banco Santander will own directly the remaining 33.3% stake. The closing of the Transaction is expected to happen in 2016, subject to certain regulatory and other approvals. Under the Investment Company Act of 1940, completion of the Transaction will cause each fund's current investment advisory agreement with PIM to terminate. Accordingly, each fund's Board of Trustees will be asked to approve a new investment advisory agreement. If approved by the Board, each fund's new investment advisory agreement will be submitted to the shareholders of the fund for their approval. Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 59 Approval of Investment Advisory Agreement Pioneer Investment Management, Inc. (PIM) serves as the investment adviser to Pioneer Absolute Return Bond Fund (the Fund) pursuant to an investment advisory agreement between PIM and the Fund. In order for PIM to remain the investment adviser of the Fund, the Trustees of the Fund must determine annually whether to renew the investment advisory agreement for the Fund. The contract review process began in January 2015 as the Trustees of the Fund agreed on, among other things, an overall approach and timeline for the process. Contract review materials were provided to the Trustees in March 2015 and July 2015. Supplemental contract review materials were provided to the Trustees in September 2015. In addition, the Trustees reviewed and discussed the Fund's performance at regularly scheduled meetings throughout the year, and took into account other information related to the Fund provided to the Trustees at regularly scheduled meetings, in connection with the review of the Fund's investment advisory agreement. In March 2015, the Trustees, among other things, discussed the memorandum provided by Fund counsel that summarized the legal standards and other considerations that are relevant to the Trustees in their deliberations regarding the renewal of the investment advisory agreement, and reviewed and discussed the qualifications of the investment management teams, as well as the level of investment by the Fund's portfolio managers in the Fund. In July 2015, the Trustees, among other things, reviewed the Fund's management fee and total expense ratios, the financial statements of PIM and its parent companies, the profitability analyses provided by PIM, and possible economies of scale. The Trustees also reviewed the profitability of the institutional business of PIM and PIM's affiliate, Pioneer Institutional Asset Management, Inc. (together with PIM, "Pioneer"), as compared to that of PIM's fund management business, and considered the differences between the fees and expenses of the Fund and the fees and expenses of Pioneer's institutional accounts, as well as the different services provided by PIM to the Fund and by Pioneer to the institutional accounts. The Trustees further considered contract review materials in September 2015. At a meeting held on September 15, 2015, based on their evaluation of the information provided by PIM and third parties, the Trustees of the Fund, including the Independent Trustees voting separately, unanimously approved the renewal of the investment advisory agreement for another year. In approving the renewal of the investment advisory agreement, the Trustees considered various factors that they determined were relevant, including the factors described below. The Trustees did not identify any single factor as the controlling factor in determining to approve the renewal of the agreement. 60 Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 Nature, Extent and Quality of Services The Trustees considered the nature, extent and quality of the services that had been provided by PIM to the Fund, taking into account the investment objective and strategy of the Fund. The Trustees also reviewed PIM's investment approach for the Fund and its research process. The Trustees considered the resources of PIM and the personnel of PIM who provide investment management services to the Fund. They also reviewed the amount of non-Fund assets managed by the portfolio managers of the Fund. The Trustees considered the non-investment resources and personnel of PIM involved in PIM's services to the Fund, including PIM's compliance and legal resources and personnel. The Trustees noted the substantial attention and high priority given by PIM's senior management to the Pioneer fund complex. The Trustees considered that PIM supervises and monitors the performance of the Fund's service providers and provides the Fund with personnel (including Fund officers) and other resources that are necessary for the Fund's business management and operations. The Trustees also considered that, as administrator, PIM is responsible for the administration of the Fund's business and other affairs. The Trustees considered the fees paid to PIM for the provision of administration services. Based on these considerations, the Trustees concluded that the nature, extent and quality of services that had been provided by PIM to the Fund were satisfactory and consistent with the terms of the investment advisory agreement. Performance of the Fund In considering the Fund's performance, the Trustees regularly review and discuss throughout the year data prepared by PIM and information comparing the Fund's performance with the performance of its peer group of funds as classified by each of Morningstar, Inc. (Morningstar) and Lipper, and with the performance of the Fund's benchmark index. They discussed the Fund's performance with PIM on a more frequent basis in light of the Fund's unfavorable performance compared to its benchmark index and peers over certain periods. The Trustees noted PIM's explanation for the Fund's relative performance. It was noted that the Fund commenced operations on January 30, 2014. The Trustees' reviews and discussions, including the steps taken by PIM to address the Fund's performance, were factored into the Trustees' deliberations concerning the renewal of the advisory agreement. Management Fee and Expenses The Trustees considered information showing the fees and expenses of the Fund in comparison to the management fees and expense ratios of its peer group of funds as classified by Morningstar and also to the expense ratios of a Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 61 peer group of funds selected on the basis of criteria determined by the Independent Trustees for this purpose using data provided by Strategic Insight Mutual Fund Research and Consulting, LLC (Strategic Insight), an independent third party. In all quintile rankings referred to below, first quintile is most favorable to the Fund's shareowners. The Trustees considered that the Fund's management fee for the most recent fiscal year was in the second quintile relative to the management fees paid by other funds in its Morningstar peer group for the comparable period. The Trustees considered that the expense ratio of the Fund's Class A shares for the most recent fiscal year was in the second quintile relative to its Morningstar peer group and in the first quintile relative to its Strategic Insight peer group, in each case for the comparable period. The Trustees noted that PIM was waiving fees and/or reimbursing expenses in order to limit the ordinary operating expenses of the Fund. The Trustees considered the impact of transfer agency, sub-transfer agency, and other non-management fee expenses on the expense ratios of the Fund. The Trustees noted that they separately review the Fund's transfer agency, sub-transfer agency and intermediary arrangements. The Trustees reviewed management fees charged by Pioneer to institutional and other clients, including publicly offered European funds sponsored by affiliates of Pioneer, unaffiliated U.S. registered investment companies (in a sub-advisory capacity), and unaffiliated foreign and domestic separate accounts. The Trustees also considered PIM's costs in providing services to the Fund and Pioneer's costs in providing services to the other clients and considered the differences in management fees and profit margins for Fund and non-Fund services. In evaluating the fees associated with Pioneer's client accounts, the Trustees took into account the respective demands, resources and complexity associated with the Fund and client accounts. The Trustees noted that, in some instances, the fee rates for those clients were lower than the management fee for the Fund and considered that, under the investment advisory agreement with the Fund, PIM performs additional services for the Fund that it does not provide to those other clients or services that are broader in scope, including oversight of the Fund's other service providers and activities related to compliance and the extensive regulatory and tax regimes to which the Fund is subject. The Trustees also considered the different entrepreneurial risks associated with PIM's management of the Fund and Pioneer's management of the other client accounts. The Trustees concluded that the management fee payable by the Fund to PIM was reasonable in relation to the nature and quality of the services provided by PIM to the Fund. 62 Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 Profitability The Trustees considered information provided by PIM regarding the profitability of PIM with respect to the advisory services provided by PIM to the Fund, including the methodology used by PIM in allocating certain of its costs to the management of the Fund. The Trustees also considered PIM's profit margin in connection with the overall operation of the Fund. They further reviewed the financial results realized by PIM and its affiliates from non-fund businesses. The Trustees considered PIM's profit margins with respect to the Fund in comparison to the limited industry data available and noted that the profitability of any adviser was affected by numerous factors, including its organizational structure and method for allocating expenses. The Trustees concluded that PIM's profitability with respect to the management of the Fund was not unreasonable. Economies of Scale The Trustees considered PIM's views relating to economies of scale in connection with the Pioneer Funds as fund assets grow and the extent to which any such economies of scale are shared with funds and fund shareholders. The Trustees recognize that economies of scale are difficult to identify and quantify, and that, among other factors that may be relevant, are the following: fee levels, expense subsidization, investment by PIM in research and analytical capabilities and PIM's commitment and resource allocation to the Fund. The Trustees noted that profitability also may be an indicator of the availability of any economies of scale, although profitability may vary for other reasons including reductions in expenses. The Trustees concluded that economies of scale, if any, were being appropriately shared with the Funds. Other Benefits The Trustees considered the other benefits to PIM from its relationship with the Fund. The Trustees considered the character and amount of fees paid by the Fund, other than under the investment advisory agreement, for services provided by PIM and its affiliates. The Trustees further considered the revenues and profitability of PIM's businesses other than the fund business. Pioneer is the principal U.S. asset management business of Pioneer Global Asset Management, the worldwide asset management business of UniCredit Group, which manages over $150 billion in assets (including the Funds). Pioneer and the Funds receive reciprocal intangible benefits from the relationship, including mutual brand recognition and, for the Funds, direct and indirect access to the resources of a large global asset manager. The Trustees concluded that any such benefits received by Pioneer as a result of its relationship with the Funds were reasonable and their consideration of the advisory agreement between the Fund and PIM and the fees thereunder were unaffected by Pioneer's possible receipt of any such intangible benefits. Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 63 Conclusion After consideration of the factors described above as well as other factors, the Trustees, including all of the Independent Trustees, concluded that the investment advisory agreement between PIM and the Fund, including the fees payable thereunder, was fair and reasonable and voted to approve the proposed renewal of the investment advisory agreement for the Fund. 64 Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 Trustees, Officers and Service Providers Trustees Advisory Trustee Thomas J. Perna, Chairman Lorraine H. Monchak* David R. Bock Benjamin M. Friedman Officers Margaret B.W. Graham Lisa M. Jones, President and Chief Marguerite A. Piret Executive Officer Fred J. Ricciardi Mark E. Bradley, Treasurer and Kenneth J. Taubes Chief Financial Officer Christopher J. Kelley, Secretary and Chief Legal Officer Investment Adviser and Administrator Pioneer Investment Management, Inc. Custodian and Sub-Administrator Brown Brothers Harriman & Co. Principal Underwriter Pioneer Funds Distributor, Inc. Legal Counsel Morgan, Lewis & Bockius LLP Shareowner Services and Transfer Agent Boston Financial Data Services, Inc. Proxy Voting Policies and Procedures of the Fund are available without charge, upon request, by calling our toll free number (1-800-225-6292). Information regarding how the Fund voted proxies relating to portfolio securities during the most recent 12-month period ended June 30 is publicly available to shareowners at us.pioneerinvestments.com. This information is also available on the Securities and Exchange Commission's web site at www.sec.gov. * Ms. Monchak is a non-voting Advisory Trustee. Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 65 This page for your notes. 66 Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 This page for your notes. Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 67 This page for your notes. 68 Pioneer Absolute Return Bond Fund | Semiannual Report | 2/29/16 How to Contact Pioneer We are pleased to offer a variety of convenient ways for you to contact us for assistance or information. Call us for: -------------------------------------------------------------------------------- Account Information, including existing accounts, new accounts, prospectuses, applications and service forms 1-800-225-6292 FactFone(SM) for automated fund yields, prices, account information and transactions 1-800-225-4321 Retirement plans information 1-800-622-0176 Write to us: -------------------------------------------------------------------------------- Pioneer Funds P.O. Box 55014 Boston, Massachusetts 02205-5014 Our toll-free fax 1-800-225-4240 Our internet e-mail address ask.pioneer@pioneerinvestments.com (for general questions about Pioneer only) Visit our web site: us.pioneerinvestments.com This report must be preceded or accompanied by a prospectus. The Fund files a complete schedule of investments with the Securities and Exchange Commission for the first and third quarters for each fiscal year on Form N-Q. Shareholders may view the filed Form N-Q by visiting the Commission's web site at http://www.sec.gov. The filed form may also be viewed and copied at the Commission's Public Reference Room in Washington, DC. Information regarding the operations of the Public Reference Room may be obtained by calling 1-800-SEC-0330. [LOGO] PIONEER Investments(R) Pioneer Investment Management, Inc. 60 State Street Boston, MA 02109 us.pioneerinvestments.com Securities offered through Pioneer Funds Distributor, Inc. 60 State Street, Boston, MA 02109 Underwriter of Pioneer Mutual Funds, Member SIPC (C) 2016 Pioneer Investments 27690-02-0416 ITEM 2. CODE OF ETHICS. (a) Disclose whether, as of the end of the period covered by the report, the registrant has adopted a code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party. If the registrant has not adopted such a code of ethics, explain why it has not done so. The registrant has adopted, as of the end of the period covered by this report, a code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer and controller. (b) For purposes of this Item, the term "code of ethics" means written standards that are reasonably designed to deter wrongdoing and to promote: (1) Honest and ethical conduct, including the ethical handling of actual or apparent conflicts of interest between personal and professional relationships; (2) Full, fair, accurate, timely, and understandable disclosure in reports and documents that a registrant files with, or submits to, the Commission and in other public communications made by the registrant; (3) Compliance with applicable governmental laws, rules, and regulations; (4) The prompt internal reporting of violations of the code to an appropriate person or persons identified in the code; and (5) Accountability for adherence to the code. (c) The registrant must briefly describe the nature of any amendment, during the period covered by the report, to a provision of its code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party, and that relates to any element of the code of ethics definition enumerated in paragraph (b) of this Item. The registrant must file a copy of any such amendment as an exhibit pursuant to Item 10(a), unless the registrant has elected to satisfy paragraph (f) of this Item by posting its code of ethics on its website pursuant to paragraph (f)(2) of this Item, or by undertaking to provide its code of ethics to any person without charge, upon request, pursuant to paragraph (f)(3) of this Item. The registrant has made no amendments to the code of ethics during the period covered by this report. (d) If the registrant has, during the period covered by the report, granted a waiver, including an implicit waiver, from a provision of the code of ethics to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party, that relates to one or more of the items set forth in paragraph (b) of this Item, the registrant must briefly describe the nature of the waiver, the name of the person to whom the waiver was granted, and the date of the waiver. Not applicable. (e) If the registrant intends to satisfy the disclosure requirement under paragraph (c) or (d) of this Item regarding an amendment to, or a waiver from, a provision of its code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions and that relates to any element of the code of ethics definition enumerated in paragraph (b) of this Item by posting such information on its Internet website, disclose the registrant's Internet address and such intention. Not applicable. (f) The registrant must: (1) File with the Commission, pursuant to Item 12(a)(1), a copy of its code of ethics that applies to the registrant's principal executive officer,principal financial officer, principal accounting officer or controller, or persons performing similar functions, as an exhibit to its annual report on this Form N-CSR (see attachment); (2) Post the text of such code of ethics on its Internet website and disclose, in its most recent report on this Form N-CSR, its Internet address and the fact that it has posted such code of ethics on its Internet website; or (3) Undertake in its most recent report on this Form N-CSR to provide to any person without charge, upon request, a copy of such code of ethics and explain the manner in which such request may be made. 	See Item 10(2) ITEM 3. AUDIT COMMITTEE FINANCIAL EXPERT. (a) (1) Disclose that the registrant's board of trustees has determined that the registrant either: (i) Has at least one audit committee financial expert serving on its audit committee; or (ii) Does not have an audit committee financial expert serving on its audit committee. The registrant's Board of Trustees has determined that the registrant has at least one audit committee financial expert. (2) If the registrant provides the disclosure required by paragraph (a)(1)(i) of this Item, it must disclose the name of the audit committee financial expert and whether that person is "independent." In order to be considered "independent" for purposes of this Item, a member of an audit committee may not, other than in his or her capacity as a member of the audit committee, the board of trustees, or any other board committee: (i) Accept directly or indirectly any consulting, advisory, or other compensatory fee from the issuer; or (ii) Be an "interested person" of the investment company as defined in Section 2(a)(19) of the Act (15 U.S.C. 80a-2(a)(19)). Ms. Marguerite A. Piret, an independent trustee, is such an audit committee financial expert. (3) If the registrant provides the disclosure required by paragraph (a)(1) (ii) of this Item, it must explain why it does not have an audit committee financial expert. Not applicable. ITEM 4. PRINCIPAL ACCOUNTANT FEES AND SERVICES. (a) Disclose, under the caption AUDIT FEES, the aggregate fees billed for each of the last two fiscal years for professional services rendered by the principal accountant for the audit of the registrant's annual financial statements or services that are normally provided by the accountant in connection with statutory and regulatory filings or engagements for those fiscal years. N/A (b) Disclose, under the caption AUDIT-RELATED FEES, the aggregate fees billed in each of the last two fiscal years for assurance and related services by the principal accountant that are reasonably related to the performance of the audit of the registrant's financial statements and are not reported under paragraph (a) of this Item. Registrants shall describe the nature of the services comprising the fees disclosed under this category. N/A (c) Disclose, under the caption TAX FEES, the aggregate fees billed in each of the last two fiscal years for professional services rendered by the principal accountant for tax compliance, tax advice, and tax planning. Registrants shall describe the nature of the services comprising the fees disclosed under this category. N/A (d) Disclose, under the caption ALL OTHER FEES, the aggregate fees billed in each of the last two fiscal years for products and services provided by the principal accountant, other than the services reported in paragraphs (a) through (c) of this Item. Registrants shall describe the nature of the services comprising the fees disclosed under this category. N/A (e) (1) Disclose the audit committee's pre-approval policies and procedures described in paragraph (c)(7) of Rule 2-01 of Regulation S-X. PIONEER FUNDS APPROVAL OF AUDIT, AUDIT-RELATED, TAX AND OTHER SERVICES PROVIDED BY THE INDEPENDENT AUDITOR SECTION I - POLICY PURPOSE AND APPLICABILITY The Pioneer Funds recognize the importance of maintaining the independence of their outside auditors. Maintaining independence is a shared responsibility involving Pioneer Investment Management, Inc ("PIM"), the audit committee and the independent auditors. The Funds recognize that a Fund's independent auditors: 1) possess knowledge of the Funds, 2) are able to incorporate certain services into the scope of the audit, thereby avoiding redundant work, cost and disruption of Fund personnel and processes, and 3) have expertise that has value to the Funds. As a result, there are situations where it is desirable to use the Fund's independent auditors for services in addition to the annual audit and where the potential for conflicts of interests are minimal. Consequently, this policy, which is intended to comply with Rule 210.2-01(C)(7), sets forth guidelines and procedures to be followed by the Funds when retaining the independent audit firm to perform audit, audit-related tax and other services under those circumstances, while also maintaining independence. Approval of a service in accordance with this policy for a Fund shall also constitute approval for any other Fund whose pre-approval is required pursuant to Rule 210.2-01(c)(7)(ii). In addition to the procedures set forth in this policy, any non-audit services that may be provided consistently with Rule 210.2-01 may be approved by the Audit Committee itself and any pre-approval that may be waived in accordance with Rule 210.2-01(c)(7)(i)(C) is hereby waived. Selection of a Fund's independent auditors and their compensation shall be determined by the Audit Committee and shall not be subject to this policy. SECTION II - POLICY ---------------- -------------------------------- ------------------------------------------------- SERVICE SERVICE CATEGORY DESCRIPTION SPECIFIC PRE-APPROVED SERVICE SUBCATEGORIES CATEGORY ---------------- -------------------------------- ------------------------------------------------- I. AUDIT Services that are directly o Accounting research assistance SERVICES related to performing the o SEC consultation, registration independent audit of the Funds statements, and reporting o Tax accrual related matters o Implementation of new accounting standards o Compliance letters (e.g. rating agency letters) o Regulatory reviews and assistance regarding financial matters o Semi-annual reviews (if requested) o Comfort letters for closed end offerings ---------------- -------------------------------- ------------------------------------------------- II. Services which are not o AICPA attest and agreed-upon procedures AUDIT-RELATED prohibited under Rule o Technology control assessments SERVICES 210.2-01(C)(4) (the "Rule") o Financial reporting control assessments and are related extensions of o Enterprise security architecture the audit services support the assessment audit, or use the knowledge/expertise gained from the audit procedures as a foundation to complete the project. In most cases, if the Audit-Related Services are not performed by the Audit firm, the scope of the Audit Services would likely increase. The Services are typically well-defined and governed by accounting professional standards (AICPA, SEC, etc.) ---------------- -------------------------------- ------------------------------------------------- ------------------------------------- ------------------------------------ AUDIT COMMITTEE APPROVAL POLICY AUDIT COMMITTEE REPORTING POLICY ------------------------------------- ------------------------------------ o "One-time" pre-approval o A summary of all such for the audit period for all services and related fees pre-approved specific service reported at each regularly subcategories. Approval of the scheduled Audit Committee independent auditors as meeting. auditors for a Fund shall constitute pre approval for these services. ------------------------------------- ------------------------------------ o "One-time" pre-approval o A summary of all such for the fund fiscal year within services and related fees a specified dollar limit (including comparison to for all pre-approved specified dollar limits) specific service subcategories reported quarterly. o Specific approval is needed to exceed the pre-approved dollar limit for these services (see general Audit Committee approval policy below for details on obtaining specific approvals) o Specific approval is needed to use the Fund's auditors for Audit-Related Services not denoted as "pre-approved", or to add a specific service subcategory as "pre-approved" ------------------------------------- ------------------------------------ SECTION III - POLICY DETAIL, CONTINUED ----------------------- --------------------------- ----------------------------------------------- SERVICE CATEGORY SERVICE CATEGORY SPECIFIC PRE-APPROVED SERVICE SUBCATEGORIES DESCRIPTION ----------------------- --------------------------- ----------------------------------------------- III. TAX SERVICES Services which are not o Tax planning and support prohibited by the Rule, o Tax controversy assistance if an officer of the Fund o Tax compliance, tax returns, excise determines that using the tax returns and support Fund's auditor to provide o Tax opinions these services creates significant synergy in the form of efficiency, minimized disruption, or the ability to maintain a desired level of confidentiality. ----------------------- --------------------------- ----------------------------------------------- ------------------------------------- ------------------------- AUDIT COMMITTEE APPROVAL POLICY AUDIT COMMITTEE REPORTING POLICY ------------------------------------- ------------------------- ------------------------------------- ------------------------- o "One-time" pre-approval o A summary of for the fund fiscal year all such services and within a specified dollar limit related fees 				 (including comparison 			 to specified dollar 			 limits) reported 			 quarterly. o Specific approval is needed to exceed the pre-approved dollar limits for these services (see general Audit Committee approval policy below for details on obtaining specific approvals) o Specific approval is needed to use the Fund's auditors for tax services not denoted as pre-approved, or to add a specific service subcategory as "pre-approved" ------------------------------------- ------------------------- SECTION III - POLICY DETAIL, CONTINUED ----------------------- --------------------------- ----------------------------------------------- SERVICE CATEGORY SERVICE CATEGORY SPECIFIC PRE-APPROVED SERVICE SUBCATEGORIES DESCRIPTION ----------------------- --------------------------- ----------------------------------------------- IV. OTHER SERVICES Services which are not o Business Risk Management support prohibited by the Rule, o Other control and regulatory A. SYNERGISTIC, if an officer of the Fund compliance projects UNIQUE QUALIFICATIONS determines that using the Fund's auditor to provide these services creates significant synergy in the form of efficiency, minimized disruption, the ability to maintain a desired level of confidentiality, or where the Fund's auditors posses unique or superior qualifications to provide these services, resulting in superior value and results for the Fund. ----------------------- --------------------------- ----------------------------------------------- --------------------------------------- ------------------------ AUDIT COMMITTEE APPROVAL POLICY AUDIT COMMITTEE REPORTING POLICY ------------------------------------- -------------------------- o "One-time" pre-approval o A summary of for the fund fiscal year within all such services and a specified dollar limit related fees 			 (including comparison 			 to specified dollar 				 limits) reported quarterly. o Specific approval is needed to exceed the pre-approved dollar limits for these services (see general Audit Committee approval policy below for details on obtaining specific approvals) o Specific approval is needed to use the Fund's auditors for "Synergistic" or "Unique Qualifications" Other Services not denoted as pre-approved to the left, or to add a specific service subcategory as "pre-approved" ------------------------------------- -------------------------- SECTION III - POLICY DETAIL, CONTINUED ----------------------- ------------------------- ----------------------------------------------- SERVICE CATEGORY SERVICE CATEGORY SPECIFIC PROHIBITED SERVICE SUBCATEGORIES DESCRIPTION ----------------------- ------------------------- ----------------------------------------------- PROHIBITED SERVICES Services which result 1. Bookkeeping or other services in the auditors losing related to the accounting records or independence status financial statements of the audit under the Rule. client* 2. Financial information systems design and implementation* 3. Appraisal or valuation services, fairness* opinions, or contribution-in-kind reports 4. Actuarial services (i.e., setting actuarial reserves versus actuarial audit work)* 5. Internal audit outsourcing services* 6. Management functions or human resources 7. Broker or dealer, investment advisor, or investment banking services 8. Legal services and expert services unrelated to the audit 9. Any other service that the Public Company Accounting Oversight Board determines, by regulation, is impermissible ----------------------- ------------------------- ----------------------------------------------- ------------------------------------------- ------------------------------ AUDIT COMMITTEE APPROVAL POLICY AUDIT COMMITTEE REPORTING POLICY ------------------------------------------- ------------------------------ o These services are not to be o A summary of all performed with the exception of the(*) services and related services that may be permitted fees reported at each if they would not be subject to audit regularly scheduled procedures at the audit client (as Audit Committee meeting defined in rule 2-01(f)(4)) level will serve as continual the firm providing the service. confirmation that has 				 not provided any restricted services. ------------------------------------------- ------------------------------ -------------------------------------------------------------------------------- GENERAL AUDIT COMMITTEE APPROVAL POLICY: o For all projects, the officers of the Funds and the Fund's auditors will each make an assessment to determine that any proposed projects will not impair independence. o Potential services will be classified into the four non-restricted service categories and the "Approval of Audit, Audit-Related, Tax and Other Services" Policy above will be applied. Any services outside the specific pre-approved service subcategories set forth above must be specifically approved by the Audit Committee. o At least quarterly, the Audit Committee shall review a report summarizing the services by service category, including fees, provided by the Audit firm as set forth in the above policy. -------------------------------------------------------------------------------- (2) Disclose the percentage of services described in each of paragraphs (b) through (d) of this Item that were approved by the audit committee pursuant to paragraph (c)(7)(i)(C) of Rule 2-01 of Regulation S-X. N/A (f) If greater than 50 percent, disclose the percentage of hours expended on the principal accountants engagement to audit the registrant's financial statements for the most recent fiscal year that were attributed to work performed by persons other than the principal accountant's full-time, permanent employees. N/A (g) Disclose the aggregate non-audit fees billed by the registrants accountant for services rendered to the registrant, and rendered to the registrants investment adviser (not including any sub-adviser whose role is primarily portfolio management and is subcontracted with or overseen by another investment adviser), and any entity controlling, controlled by, or under common control with the adviser that provides ongoing services to the registrant for each of the last two fiscal years of the registrant. N/A (h) Disclose whether the registrants audit committee of the board of trustees has considered whether the provision of non-audit services that were rendered to the registrants investment adviser (not including any subadviser whose role is primarily portfolio management and is subcontracted with or overseen by another investment adviser), and any entity controlling, controlled by, or under common control with the investment adviser that provides ongoing services to the registrant that were not pre-approved pursuant to paragraph (c)(7)(ii) of Rule 2-01 of Regulation S-X is compatible with maintaining the principal accountant's independence. The Fund's audit committee of the Board of Trustees has considered whether the provision of non-audit services that were rendered to the Affiliates (as defined) that were not pre- approved pursuant to paragraph (c)(7)(ii) of Rule 2-01 of Regulation S-X is compatible with maintaining the principal accountant's independence. ITEM 5. AUDIT COMMITTEE OF LISTED REGISTRANTS (a) If the registrant is a listed issuer as defined in Rule 10A-3 under the Exchange Act (17 CFR 240.10A-3), state whether or not the registrant has a separately-designated standing audit committee established in accordance with Section 3(a)(58)(A) of the Exchange Act (15 U.S.C. 78c(a)(58)(A)). If the registrant has such a committee, however designated, identify each committee member. If the entire board of directors is acting as the registrant's audit committee as specified in Section 3(a)(58)(B) of the Exchange Act (15 U.S.C. 78c(a)(58)(B)), so state. N/A (b) If applicable, provide the disclosure required by Rule 10A-3(d) under the Exchange Act (17 CFR 240.10A-3(d)) regarding an exemption from the listing standards for audit committees. N/A ITEM 6. SCHEDULE OF INVESTMENTS. File Schedule of Investments in securities of unaffiliated issuers as of the close of the reporting period as set forth in 210.1212 of Regulation S-X [17 CFR 210.12-12], unless the schedule is included as part of the report to shareholders filed under Item 1 of this Form. Included in Item 1 ITEM 7. DISCLOSURE OF PROXY VOTING POLICIES AND PROCEDURES FOR CLOSED-END MANAGEMENT INVESTMENT COMPANIES. A closed-end management investment company that is filing an annual report on this Form N-CSR must, unless it invests exclusively in non-voting securities, describe the policies and procedures that it uses to determine how to vote proxies relating to portfolio securities, including the procedures that the company uses when a vote presents a conflict between the interests of its shareholders, on the one hand, and those of the company's investment adviser; principal underwriter; or any affiliated person (as defined in Section 2(a)(3) of the Investment Company Act of 1940 (15 U.S.C. 80a-2(a)(3)) and the rules thereunder) of the company, its investment adviser, or its principal underwriter, on the other. Include any policies and procedures of the company's investment adviser, or any other third party, that the company uses, or that are used on the company's behalf, to determine how to vote proxies relating to portfolio securities. Not applicable to open-end management investment companies. ITEM 8. PORTFOLIO MANAGERS OF CLOSED-END MANAGEMENT INVESTMENT COMPANIES. (a) If the registrant is a closed-end management investment company that is filing an annual report on this Form N-CSR,provide the following information: (1) State the name, title, and length of service of the person or persons employed by or associated with the registrant or an investment adviser of the registrant who are primarily responsible for the day-to-day management of the registrant's portfolio ("Portfolio Manager"). Also state each Portfolio Manager's business experience during the past 5 years. Not applicable to open-end management investment companies. ITEM 9. PURCHASES OF EQUITY SECURITIES BY CLOSED-END MANAGEMENT INVESTMENT COMPANY AND AFFILIATED PURCHASERS. (a) If the registrant is a closed-end management investment company, in the following tabular format, provide the information specified in paragraph (b) of this Item with respect to any purchase made by or on behalf of the registrant or any affiliated purchaser, as defined in Rule 10b-18(a)(3) under the Exchange Act (17 CFR 240.10b-18(a)(3)), of shares or other units of any class of the registrant's equity securities that is registered by the registrant pursuant to Section 12 of the Exchange Act (15 U.S.C. 781). Not applicable to open-end management investment companies. ITEM 10. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS. Describe any material changes to the procedures by which shareholders may recommend nominees to the registrant's board of directors, where those changes were implemented after the registrant last provided disclosure in response to the requirements of Item 407(c)(2)(iv) of Regulation S-R(17 CFR 229.407)(as required by Item 22(b)(15)) of Schedule 14A (17 CFR 240.14a-101), or this Item. There have been no material changes to the procedures by which the shareholders may recommend nominees to the registrant's board of directors since the registrant last provided disclosure in response to the requirements of Item 407(c)(2)(iv) of Regulation S-R of Schedule 14(A) in its definitive proxy statement, or this item. ITEM 11. CONTROLS AND PROCEDURES. (a) Disclose the conclusions of the registrant's principal executive and principal financials officers, or persons performing similar functions, regarding the effectiveness of the registrant's disclosure controls and procedures (as defined in Rule 30a-3(c) under the Act (17 CFR 270.30a-3(c))) as of a date within 90 days of the filing date of the report that includes the disclosure required by this paragraph, based on the evaluation of these controls and procedures required by Rule 30a-3(b) under the Act (17 CFR 270.30(a)-3(b) and Rules 13a-15(b) or 15d-15(b) under the Exchange Act (17 CFR 240.13a-15(b) or 240.15d-15(b)). The registrant's principal executive officer and principal financial officer have concluded that the registrant's disclosure controls and procedures are effective based on the evaluation of these controls and procedures as of a date within 90 days of the filing date of this report. (b) Disclose any change in the registrant's internal control over financial reporting (as defined in Rule 30a-3(d) under the Act (17CFR 270.30a-3(d)) that occured during the second fiscal quarter of the period covered by this report that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting. There were no significant changes in the registrant's internal control over financial reporting that occurred during the second fiscal quarter of the period covered by this report that have materially affected, or are reasonably likely to materially affect, the registrant's internal control over financial reporting. The registrant's principal executive officer and principal financial officer, however, voluntarily are reporting the following information: In August of 2006 the registrant's investment adviser enhanced its internal procedures for reporting performance information required to be included in prospectuses. Those enhancements involved additional internal controls over the appropriateness of performance data generated for this purpose. Such enhancements were made following an internal review which identified prospectuses relating to certain classes of shares of a limited number of registrants where, inadvertently, performance information not reflecting the deduction of applicable sales charges was included. Those prospectuses were revised, and the revised prospectuses were distributed to shareholders. ITEM 12. EXHIBITS. (a) File the exhibits listed below as part of this Form. Letter or number the exhibits in the sequence indicated. (1) Any code of ethics, or amendment thereto, that is the subject of the disclosure required by Item 2, to the extent that the registrant intends to satisfy the Item 2 requirements through filing of an exhibit. (2) A separate certification for each principal executive officer and principal financial officer of the registrant as required by Rule 30a-2(a) under the Act (17 CFR 270.30a-2(a)) , exactly as set forth below: Filed herewith. SIGNATURES [See General Instruction F] Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. (Registrant) Pioneer Series Trust V By (Signature and Title)* /s/ Lisa M. Jones Lisa M. Jones, President & Chief Executive Officer Date April 27, 2016 Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. By (Signature and Title)* /s/ Lisa M. Jones Lisa M. Jones, President & Chief Executive Officer Date April 27, 2016 By (Signature and Title)* /s/ Mark Bradley Mark E. Bradley, Treasurer & Chief Accounting & Financial Officer Date April 27, 2016 * Print the name and title of each signing officer under his or her signature.