OMB APPROVAL OMB Number: 3235-0570 Expires: August 31, 2013 Estimated average burden hours per response.....18.9 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 811-21978 Pioneer Series Trust VI (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: October 31 Date of reporting period: November 1, 2011 through April 30, 2012 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 SHAREOWNERS. Pioneer Floating Rate Fund -------------------------------------------------------------------------------- Semiannual Report | April 30, 2012 -------------------------------------------------------------------------------- Ticker Symbols: Class A FLARX Class C FLCRX Class Y FLYRX Class Z FLZRX [LOGO] PIONEER Investments(R) visit us: us.pioneerinvestments.com Table of Contents Letter to Shareowners 2 Portfolio Management Discussion 4 Portfolio Summary 8 Prices and Distributions 9 Performance Update 10 Comparing Ongoing Fund Expenses 14 Schedule of Investments 16 Financial Statements 39 Notes to Financial Statements 47 Approval of Investment Advisory Agreement 56 Trustees, Officers and Service Providers 60 Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 1 President's Letter Dear Shareowner, The U.S. economy continued its recovery through the first quarter of 2012, even as broader global concerns weighed on investors. The U.S. unemployment rate fell to 8.1% in April, and some indicators suggest that it may continue to trend down. The housing market continued to improve, fueled in part by record-low mortgage rates. The risk of rising oil prices appeared to recede. The improved outlook helped U.S. equity markets to perform well in the first quarter, with the Standard & Poor's 500 Index rising by 12%. For bond investors, the riskier sectors of the bond market fared the best. The broad bond market, as measured by the Barclays Capital Aggregate Bond Index, rose by just 0.3%, while the high-yield bond market, as measured by the Bank of America Merrill Lynch High Yield Master II Index, rose by 5.15%. We are cautiously optimistic that the U.S. economy will continue to improve. But we are also closely monitoring macroeconomic concerns that could change the market's direction, such as the lingering debt woes in Europe, the state of the Chinese economy, and the U.S. government's fiscal situation. Clouds have continued to hover over Europe, as the exit of Greece from the Euro-zone remains a possibility. Meanwhile, China continues to face a potential slowdown in economic growth. In the U.S., tax increases and spending cuts scheduled to take effect at year-end should, unless fiscal policy changes, sharply reduce the budget deficit -- which would be very good for the country in the longer run -- but also could potentially stall U.S. economic growth in 2013. All of these considerations may lead to further market volatility. At Pioneer, we have long advocated the benefits of staying diversified and investing for the long term. The strategy has generally performed well for many investors. Our advice, as always, is to work closely with a trusted financial advisor to discuss your goals and work together to develop an investment strategy that meets your individual needs. There is no single best strategy that works for every investor. Pioneer's investment professionals focus on finding good opportunities to invest in both equity and bond markets using the same disciplined investment approach we have used since 1928. Our strategy is to identify undervalued individual securities with the greatest potential for success, carefully weighing risk against reward. Our teams of investment professionals continually 2 Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 monitor and analyze the relative valuations of different sectors and securities globally to help build portfolios that we believe can help you achieve your investment goals. We invite you to learn more about Pioneer and our time-tested approach to investing by consulting with your financial advisor or visiting us online at us.pioneerinvestments.com. We greatly appreciate your trust in us, and we thank you for investing with Pioneer. Sincerely, /s/ Daniel K. Kingsbury Daniel K. Kingsbury President and CEO Pioneer Investment Management USA, Inc. 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 Floating Rate Fund | Semiannual Report | 4/30/12 3 Portfolio Management Discussion | 4/30/12 Investments in floating-rate bank loans generated solid returns over the six months ended April 30, 2012, as investor confidence strengthened based on evidence that the domestic economy was in recovery. In the following interview, Jonathan Sharkey discusses the factors that affected the performance of Pioneer Floating Rate Fund during the six months. Mr. Sharkey, vice president and a portfolio manager at Pioneer, is responsible for the daily management of the Fund. Q How did the Fund perform during the six months ended April 30, 2012? A Pioneer Floating Rate Fund Class A shares returned 4.18% at net asset value during the six months ended April 30, 2012, while the Fund's benchmark, the Barclays Capital High Yield Loans Performing Index (the Barclays Index), returned 4.69%. During the same six-month period, the average return of the 165 mutual funds in Lipper's Loan Participating Funds category was 4.63%. On April 30, 2012, the 30-day standardized SEC yield of the Fund's Class A shares was 3.51%. Q Could you describe the investment environment for floating-rate loans during the six months ended April 30, 2012, and how the Fund was positioned in that environment? A Continued signs that the domestic economy was improving, even though the pace of growth remained relatively slow, encouraged investors to seek out credit-sensitive, fixed-income investments in general -- including floating-rate bank loans -- during the six months ended April 30, 2012. As evidence accumulated about the creditworthiness of most floating-rate loans in a "risk-on" environment, high-yield fund managers and other types of institutional investors were attracted to the discounted prices at which many floating-rate loans were selling. While the Fund benefited from the favorable investment backdrop, the portfolio's emphasis on higher-quality loans resulted in a total return that somewhat lagged the performance of the benchmark Barclays Index during the full six-month period, as the benchmark had greater exposure to lower-rated loans. On the heels of what had been a very strong market for floating-rate loans in October 2011 (a month in which the asset class saw its largest monthly return since 2009), November 2011 saw the market dip to the negative side due to European sovereign-debt concerns. The market then regained positive momentum in December 2011. Despite the loan market having its worst monthly decline in August 2011 (-4.4%), loans finished with overall positive returns for the 2011 calendar year, meaning that loans have shown positive performance in 13 of the last 14 years. Although loan mutual fund growth was anemic in January 2012 and throughout the first quarter of 2012, 4 Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 loan returns were still strong, as demand for loans outside of retail mutual funds grew along with stability in the fixed-income markets, healthy repayment activity for loans and the entry into the loan market of more investors, such as high-yield funds, pension funds, and institutions. Collateralized loan obligations (CLO's), which make up 50% of the investor base in loans, saw new demand and outpaced 2011's demand. The first quarter of 2012 proved to be strong for floating-rate loans and for credit-sensitive securities in general. The markets were aided by improving employment reports within the United States, supportive central bank policies throughout the world, and the completion of a Greek debt exchange. Defaults on floating-rate loans remained at very low levels, lending further support to investors' confidence in the asset class. The 12-month default rate for floating-rate loans stood at just 0.60%, significantly lower than the 3.5% long-term average. Throughout the six months ended April 30, 2012, we kept our focus on investing the Fund in higher-rated floating-rate loans. Even as almost 15% of the Barclays Index was refinanced under new terms during the six-month period, an increasing share of the new issues were covenant-light loans, which have more relaxed protections for investors. As part of our higher- quality strategy, we continue to be selective with regard to the Fund's covenant-light allocation, as the portfolio's covenant-light exposure is at levels below those within the Barclays Index. The credit rating profile of the Fund's investments increased slightly during the six-month period. At the end of the period on April 30, 2012, just 0.80% of Fund assets were rated CCC or lower, with another 3.30% not rated. BB-rated securities accounted for 54.4% of net assets compared with 49.2% at the beginning of the period six months prior. The Fund maintained a more up-in-quality bias in comparison with the Barclays Index, which had an average credit rating of B+ as of April 30, 2012. Q What types of investments most affected the Fund's performance during the six months ended April 30, 2012? A Due to the recession-resistant nature of the health care industry, we have maintained an overweight to the sector in the Fund, but due to uncertainty about how the Bipartisan Special Commission on Deficit Reductions would affect health care, that positioning held back relative performance very early in the six-month period. The Commission's ultimate decision to adopt Health Care Sequestration was seen a having less of an impact, and thus helped the Fund to partially recover performance in the sector later in the period. Several loan investments in health care were among the more notable contributors to the Fund's performance during the six months ended April 30, 2012. The contributors included Gentiva Health Services, which provides home health care and hospice services; National Mentor, which provides home health care for people with disabilities; Carestream, a medical Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 5 technology corporation; and Sun Health Care, which operates long-term care facilities. The Fund's investment in loans to Chrysler also helped performance, as the auto maker continued to strengthen its finances. Uncertainties about future U.S. defense spending related to deficit reduction talks, coupled with less troop involvement in the field in Iraq, led to disappointing performance from the Fund's holdings in several loans to defense companies, including Hunter Defense and IAP Worldwide. Consistent with the Fund's history, the default rate remained well below that of the bank-loan industry, but during the six months ended April 30, 2012, the portfolio nevertheless experienced two defaults by very small positions: Vertrue, an internet marketing firm, and Sevan Marine, which manufactures offshore oil-drilling platforms. Neither investment had a significant impact on the Fund's overall performance. Q What is your investment outlook? A We believe that the U.S. economy will continue to grow at a modest rate, with gross domestic product (GDP) potentially exceeding 2% in 2012. American corporations generally are in sound financial health, with strong balance sheets. Industrial output and retail sales have been positive, and initial jobless claims continue to show modest improvement. Corporations also appear to be well able to make good on their loan obligations. Loans have continued to sell at discounts to their par (face) values and appear attractively priced relative to some other fixed-income investments, like investment-grade corporate bonds. At the same time, current yield spreads of floating-rate loans imply a default rate of 10% or more, and that is much higher than the actual 0.60% default rate of loans over the past 12 months, and most average default forecasts of 1.75% to 2.00% for 2012. The global economic situation in Europe and the political backdrop in Washington, D.C. (the so-called "fiscal cliff") could pose some short-term volatility over the next few months. However, we believe the Fund, with its up-in-quality bias, is well positioned to weather such volatility, and ultimately positioned for an environment of moderate economic growth. One of the benefits of floating-rate loans, as opposed to other income- oriented investments, is the potential for yields to rise as interest rates rise. However, the U.S. Federal Reserve Board has signaled its intention to keep short-term interest rates low, perhaps into 2014. Even if rates do not rise soon, floating-rate loan investors are being compensated to wait until rates rise, as current yields offered by floating-rate loans still are attractive relative to some other fixed-income investments. Loans are still trading at discounts, so there is room for capital appreciation, and the loans' short duration could provide greater price protection and income potential when rates do eventually start increasing. 6 Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 Please refer to the Schedule of Investments on pages 16-38 for a full listing of Fund securities. Debt securities rated below investment grade are commonly referred to as "junk bonds" and are considered speculative. Below investment grade debt securities involve greater risk of loss, are subject to greater price volatility and are less liquid, especially during periods of economic uncertainty or change, than higher- rated debt securities. The Fund may invest in high-yield securities of any rating, including securities that are in default at the time of purchase. Securities with floating interest rates generally are less sensitive to interest rate changes but may decline in value if their interest rates do not rise as much, or as quickly, as prevailing interest rates. Unlike fixed-rate securities, floating rate securities generally will not increase in value if interest rates decline. Changes in interest rates also will affect the amount of interest income the Fund earns on its floating rate investments. These risks may increase share price volatility. Past performance is no guarantee of future results, and there is no guarantee that market forecasts discussed will be realized. 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. These statements should not be relied upon for any other purposes. Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 7 Portfolio Summary | 4/30/12 Portfolio Diversification -------------------------------------------------------------------------------- (As a percentage of total investment portfolio) [THE DATA BELOW IS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL.] Senior Secured Loans 93.1% U.S. Corporate Bonds 3.1% Temporary Cash Investment 0.9% International Corporate Bonds 0.8% Asset Backed Securities 0.8% Collateralized Mortgage Obligations 0.7% U.S. Common Stocks 0.3% Convertible Corporate Bonds 0.3% Convertible Preferred Stocks 0.0% Portfolio Quality -------------------------------------------------------------------------------- (As a percentage of total investment portfolio; based on Standard & Poor's ratings) [THE DATA BELOW IS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL.] AAA 0.9% AA 0.1% A 0.3% BBB 5.7% BB 54.4% B 34.5% CCC 0.8% Not Rated 3.3% Bond ratings are ordered highest to lowest in portfolio. Based on Standard & Poor's measures, AAA (highest possible rating) through BBB are considered investment grade; BB or lower ratings are considered non-investment grade. Cash equivalents and some bonds may not be rated. 10 Largest Holdings -------------------------------------------------------------------------------- (As a percentage of long-term holdings)* 1. CPG International I, Inc., Term Loan, 1/26/17 0.96% -------------------------------------------------------------------------------- 2. Grifols, Inc., New U.S. Tranche B Term Loan, 6/4/17 0.84 -------------------------------------------------------------------------------- 3. Chrysler Group LLC, Tranche B Term Loan, 4/28/17 0.78 -------------------------------------------------------------------------------- 4. Freescale Semiconductor, Inc., Tranche B-1 Term Loan, 12/1/16 0.78 -------------------------------------------------------------------------------- 5. Fairmount Minerals, Ltd., Tranche B Term Loan, 3/1/17 0.76 -------------------------------------------------------------------------------- 6. Interactive Data Corp., Term B Loan, 1/31/18 0.75 -------------------------------------------------------------------------------- 7. Telesat Canada, U.S. Term B Loan, 3/28/19 0.74 -------------------------------------------------------------------------------- 8. HHI Holdings LLC, Loan, 3/9/17 0.74 -------------------------------------------------------------------------------- 9. Tasc, Inc., New Tranche B Term Loan, 4/25/15 0.73 -------------------------------------------------------------------------------- 10. Protection One, Inc., Term Loan 2012, 3/20/19 0.73 -------------------------------------------------------------------------------- * 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 Floating Rate Fund | Semiannual Report | 4/30/12 Prices and Distributions | 4/30/12 Net Asset Value per Share -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Class 4/30/12 10/31/11 -------------------------------------------------------------------------------- A $6.89 $6.77 -------------------------------------------------------------------------------- C $6.89 $6.78 -------------------------------------------------------------------------------- Y $6.90 $6.78 -------------------------------------------------------------------------------- Z $6.91 $6.80 -------------------------------------------------------------------------------- Distributions per Share: 11/1/11-4/30/12 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Net Investment Short-Term Long-Term Class Income Capital Gains Capital Gains -------------------------------------------------------------------------------- A $0.1595 $ -- $ -- -------------------------------------------------------------------------------- C $0.1337 $ -- $ -- -------------------------------------------------------------------------------- Y $0.1689 $ -- $ -- -------------------------------------------------------------------------------- Z $0.1672 $ -- $ -- -------------------------------------------------------------------------------- The Barclays Capital High Yield Loans Performing Index provides broad and comprehensive total return metrics of the universe of syndicated term loans. To be included in the index, a bank loan must be dollar denominated, have at least $150 million in funded loans, a minimum term of one year, and a minimum initial spread of LIBOR+125. 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 10-13. Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 9 Performance Update | 4/30/12 Class A Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Pioneer Floating Rate Fund at public offering price, compared to that of the Barclays Capital High Yield Loans Performing Index. Cumulative Total Returns (As of April 30, 2012) ------------------------------------------------------------------ Net Asset Public Offering Period Value Price (POP) ------------------------------------------------------------------ Life-of-Class (2/14/07) 3.73% 2.82% 5 Years 3.65 2.69 1 Year 3.74 -0.96 ------------------------------------------------------------------ Expense Ratio (Per prospectus dated March 1, 2012) ------------------------------------------------------------------ Gross ------------------------------------------------------------------ 1.12% ------------------------------------------------------------------ [THE DATA BELOW IS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL.] Value of $10,000 Investment Barclays Capital Pioneer Floating High Yield Loans Rate Fund Performing Index 2/07 $ 9,550 $10,000 4/08 9,422 10,046 4/09 8,466 8,784 4/10 10,477 11,598 4/11 11,142 12,392 4/12 11,559 12,725 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. POP returns reflect deduction of maximum 4.50% sales charge. NAV 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. 10 Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 Performance Update | 4/30/12 Class C Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Pioneer Floating Rate Fund, compared to that of the Barclays Capital High Yield Loans Performing Index. Cumulative Total Returns (As of April 30, 2012) -------------------------------------------------------------- If If Period Held Redeemed -------------------------------------------------------------- Life-of-Class (2/14/07) 2.86% 2.86% 5 Years 2.79 2.79 1 Year 2.81 2.81 -------------------------------------------------------------- Expense Ratio (Per prospectus dated March 1, 2012) -------------------------------------------------------------- Gross -------------------------------------------------------------- 1.89% -------------------------------------------------------------- [THE DATA BELOW IS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL.] Value of $10,000 Investment Barclays Capital Pioneer Floating High Yield Loans Rate Fund Performing Index 2/07 $10,000 $10,000 4/08 9,753 10,046 4/09 8,696 8,784 4/10 10,683 11,598 4/11 11,266 12,392 4/12 11,582 12,725 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 Floating Rate Fund | Semiannual Report | 4/30/12 11 Performance Update | 4/30/12 Class Y Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $5 million investment made in Pioneer Floating Rate Fund, compared to that of the Barclays Capital High Yield Loans Performing Index. Cumulative Total Returns (As of April 30, 2012) -------------------------------------------------------------- If If Period Held Redeemed -------------------------------------------------------------- Life-of-Class (2/14/07) 3.87% 3.87% 5 Years 3.80 3.80 1 Year 3.87 3.87 -------------------------------------------------------------- Expense Ratio (Per prospectus dated March 1, 2012) -------------------------------------------------------------- Gross Net -------------------------------------------------------------- 0.88% 0.70% -------------------------------------------------------------- [THE DATA BELOW IS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL.] Value of $5 Million Investment Barclays Capital Pioneer Floating High Yield Loans Rate Fund Performing Index 2/07 $5,000,000 $5,000,000 4/08 4,933,654 5,022,890 4/09 4,433,295 4,391,758 4/10 5,504,693 5,798,806 4/11 5,866,555 6,195,947 4/12 6,093,369 6,362,526 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 contractual expense limitations currently in effect through March 1, 2013 for Class Y shares. There can be no assurance that Pioneer will extend the expense limitations 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 Floating Rate Fund | Semiannual Report | 4/30/12 Performance Update | 4/30/12 Class Z Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Pioneer Floating Rate Fund, compared to that of the Barclays Capital High Yield Loans Performing Index. Cumulative Total Returns (As of April 30, 2012) -------------------------------------------------------------- If If Period Held Redeemed -------------------------------------------------------------- Life-of-Class (8/8/11) 2.97% 2.97% 1 Year 3.88 3.88 -------------------------------------------------------------- Expense Ratio (Per prospectus dated March 1, 2012) -------------------------------------------------------------- Gross Net -------------------------------------------------------------- 1.22% 0.90% -------------------------------------------------------------- [THE DATA BELOW IS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL.] Value of $10,000 Investment Barclays Capital Pioneer Floating High Yield Loans Rate Fund Performing Index 2/07 $10,000 $10,000 4/08 9,736 10,046 4/09 8,652 8,784 4/10 10,592 11,598 4/11 11,215 12,392 4/12 11,650 12,725 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 Class Z shares for periods prior to the inception of Class Z shares on August 8, 2011, reflects 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 Z shares, the performance for Class Z shares prior to their inception on August 8, 2011, would have been higher than the performance shown. Class Z shares are not subject to sales charges and are available for limited groups of eligible 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 contractual expense limitations currently in effect through March 1, 2013, for Class Z shares. There can be no assurance that Pioneer will extend the expense limitations 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 Floating Rate Fund | Semiannual Report | 4/30/12 13 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 Floating Rate Fund Based on actual returns from November 1, 2011, through April 30, 2012. ------------------------------------------------------------------------------------- Share Class A C Y Z ------------------------------------------------------------------------------------- Beginning Account $1,000.00 $1,000.00 $1,000.00 $1,000.00 Value on 11/1/11 ------------------------------------------------------------------------------------- Ending Account Value $1,041.80 $1,036.30 $1,043.20 $1,041.30 (after expenses) on 4/30/12 ------------------------------------------------------------------------------------- Expenses Paid $5.38 $9.27 $3.40 $4.21 During Period* ------------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized expense ratio of 1.06%, 1.83%, 0.67% and 0.83% for Class A, Class C, Class Y and Class Z shares, respectively, multiplied by the average account value over the period, multiplied by 182/366 (to reflect the one-half year period). 14 Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 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 Floating Rate Fund Based on a hypothetical 5% return per year before expenses, reflecting the period from November 1, 2011, through April 30, 2012. ------------------------------------------------------------------------------------- Share Class A C Y Z ------------------------------------------------------------------------------------- Beginning Account $1,000.00 $1,000.00 $1,000.00 $1,000.00 Value on 11/1/11 ------------------------------------------------------------------------------------- Ending Account Value $1,019.59 $1,015.76 $1,021.53 $1,020.74 (after expenses) on 4/30/12 ------------------------------------------------------------------------------------- Expenses Paid $5.32 $9.17 $3.37 $4.17 During Period* ------------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized expense ratio of 1.06%, 1.83%, 0.67% and 0.83% for Class A, Class C, Class Y and Class Z shares, respectively, multiplied by the average account value over the period, multiplied by 182/366 (to reflect the one-half year period). Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 15 Schedule of Investments | 4/30/12 (unaudited) ------------------------------------------------------------------------------------------------------ Principal Floating S&P/Moody's Amount ($) Rate (b) Ratings Value ------------------------------------------------------------------------------------------------------ CONVERTIBLE CORPORATE BONDS -- 0.3% DIVERSIFIED FINANCIALS -- 0.3% Asset Management & Custody Banks -- 0.3% 1,000,000 BBB/NR Apollo Investment Corp., 5.75%, 1/15/16 $ 978,750 ------------ Total Diversified Financials $ 978,750 ------------------------------------------------------------------------------------------------------ TOTAL CONVERTIBLE CORPORATE BONDS (Cost $990,371) $ 978,750 ------------------------------------------------------------------------------------------------------ CONVERTIBLE PREFERRED STOCKS -- 0.0% CAPITAL GOODS -- 0.0% Industrial Machinery -- 0.0% 1,000 BBB+/Baa3 Stanley Black & Decker, Inc., 4.75%, 11/17/15 $ 120,000 ------------ Total Capital Goods $ 120,000 ------------------------------------------------------------------------------------------------------ TOTAL CONVERTIBLE PREFERRED STOCKS (Cost $100,000) $ 120,000 ------------------------------------------------------------------------------------------------------ Shares ------------------------------------------------------------------------------------------------------ COMMON STOCKS -- 0.1% AUTOMOBILES & COMPONENTS -- 0.0% Auto Parts & Equipment -- 0.0% 4 Lear Corp. $ 166 ------------ Total Automobiles & Components $ 166 ------------------------------------------------------------------------------------------------------ REAL ESTATE -- 0.1% Real Estate Development -- 0.1% 106,253 Newhall Land Development LLC* $ 138,129 ------------ Total Real Estate $ 138,129 ------------------------------------------------------------------------------------------------------ TOTAL COMMON STOCKS (Cost $88,066) $ 138,295 ------------------------------------------------------------------------------------------------------ Principal Amount ($) ------------------------------------------------------------------------------------------------------ ASSET BACKED SECURITIES -- 0.8% BANKS -- 0.6% Diversified Banks -- 0.0% 151,769 0.62 AAA/NR Wells Fargo Home Equity Trust, Floating Rate Note, 12/25/35 (144A) $ 145,285 ------------------------------------------------------------------------------------------------------ Thrifts & Mortgage Finance -- 0.6% 718,269 0.87 AAA/Aaa Bayview Financial Acquisition Trust, Floating Rate Note, 5/28/44 $ 664,221 350,210 0.52 AAA/Aa1 Bear Stearns Asset Backed Securities Trust, Floating Rate Note, 2/25/36 327,814 405,442 0.64 AAA/Aa3 Citigroup Mortgage Loan Trust, Inc., Floating Rate Note, 8/25/35 389,417 199,816 0.36 BBB/Aa3 Option One Mortgage Loan Trust, Floating Rate Note, 2/25/38 197,804 The accompanying notes are an integral part of these financial statements. 16 Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 -------------------------------------------------------------------------------------------------------- Principal Floating S&P/Moody's Amount ($) Rate (b) Ratings Value -------------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 123,383 0.71 AAA/Aaa Residential Asset Securities Corp., Floating Rate Note, 12/25/34 $ 117,763 ------------ $ 1,697,019 ------------ Total Banks $ 1,842,304 -------------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 0.2% Other Diversified Financial Services -- 0.0% 107,557 1.04 B/B1 Ellington Loan Acquisition Trust, Floating Rate Note, 5/27/37 (144A) $ 99,044 -------------------------------------------------------------------------------------------------------- Specialized Finance -- 0.2% 80,384 0.51 AA/Baa3 Aegis Asset Backed Securities Trust, Floating Rate Note, 12/25/35 $ 69,368 367,831 0.63 CCC+/Caa2 Lease Investment Flight Trust, Floating Rate Note, 7/15/31 237,251 367,831 0.67 CCC+/Caa2 Lease Investment Flight Trust, Floating Rate Note, 7/15/31 237,251 ------------ $ 543,870 ------------ Total Diversified Financials $ 642,914 -------------------------------------------------------------------------------------------------------- TOTAL ASSET BACKED SECURITIES (Cost $2,455,640) $ 2,485,218 -------------------------------------------------------------------------------------------------------- COLLATERALIZED MORTGAGE OBLIGATIONS -- 0.7% BANKS -- 0.2% Thrifts & Mortgage Finance -- 0.2% 347,557 1.02 AAA/A3 Sequoia Mortgage Trust, Floating Rate Note, 1/20/35 $ 279,879 185,046 2.75 AAA/Ba1 Wells Fargo Mortgage Backed Securities Trust, Floating Rate Note, 6/25/34 180,445 ------------ $ 460,324 ------------ Total Banks $ 460,324 -------------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 0.4% Other Diversified Financial Services -- 0.4% 300,000 0.94 BBB+/Baa2 Morgan Stanley Capital I, Floating Rate Note, 12/15/20 (144A) $ 273,585 249,996 0.84 AAA/Ba3 Residential Accredit Loans, Inc., Floating Rate Note, 4/25/34 231,492 888,518 4.24 NR/A2 Velocity Commercial Capital Loan Trust, Floating Rate Note, 8/25/40 (144A) 757,462 ------------ $ 1,262,539 ------------ Total Diversified Financials $ 1,262,539 -------------------------------------------------------------------------------------------------------- REAL ESTATE -- 0.1% Mortgage REITs -- 0.1% 128,752 2.73 AAA/Caa1 American Home Mortgage Investment Trust, Floating Rate Note, 6/25/45 $ 103,283 The accompanying notes are an integral part of these financial statements. Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 17 Schedule of Investments | 4/30/12 (unaudited) (continued) ---------------------------------------------------------------------------------------------------------------- Principal Floating S&P/Moody's Amount ($) Rate (b) Ratings Value ---------------------------------------------------------------------------------------------------------------- Mortgage REIT's -- (continued) 345,256 2.73 AAA/B1 American Home Mortgage Investment Trust, Floating Rate Note, 6/25/45 $ 320,307 ------------ $ 423,590 ------------ Total Real Estate $ 423,590 ---------------------------------------------------------------------------------------------------------------- TOTAL COLLATERALIZED MORTGAGE OBLIGATIONS (Cost $2,191,908) $ 2,146,453 ---------------------------------------------------------------------------------------------------------------- CORPORATE BONDS -- 4.0% ENERGY -- 0.5% Oil & Gas Drilling -- 0.1% 150,000 B-/B3 Offshore Group Investments, Ltd., 11.5%, 8/1/15 $ 164,062 ---------------------------------------------------------------------------------------------------------------- Oil & Gas Equipment & Services -- 0.1% NOK 1,500,000 9.67 NR/NR Transocean Drilling Norway AS, Floating Rate Note, 2/24/16 $ 279,181 ---------------------------------------------------------------------------------------------------------------- Oil & Gas Exploration & Production -- 0.2% 498,000 BB/B1 Denbury Resources, Inc., 8.25%, 2/15/20 $ 555,270 ---------------------------------------------------------------------------------------------------------------- Coal & Consumable Fuels -- 0.1% 400,000 B/B3 Murray Energy Corp., 10.25%, 10/15/15 (144A) $ 380,000 ------------ Total Energy $ 1,378,513 ---------------------------------------------------------------------------------------------------------------- MATERIALS -- 0.3% Paper Packaging -- 0.2% 515,000 B/B3 Packaging Dynamics Corp., 8.75%, 2/1/16 (144A) $ 547,188 ---------------------------------------------------------------------------------------------------------------- Paper Products -- 0.1% 225,000 B+/B1 Appleton Papers, Inc., 10.5%, 6/15/15 (144A) $ 235,125 250,000 CCC+/B3 Appleton Papers, Inc., 11.25%, 12/15/15 235,625 ------------ $ 470,750 ------------ Total Materials $ 1,017,938 ---------------------------------------------------------------------------------------------------------------- CAPITAL GOODS -- 0.2% Electrical Components & Equipment -- 0.1% 250,000 B/B2 WireCo WorldGroup, Inc., 9.5%, 5/15/17 $ 258,125 ---------------------------------------------------------------------------------------------------------------- Construction & Farm Machinery & Heavy Trucks -- 0.1% 400,000 B+/B1 Titan International, Inc., 7.875%, 10/1/17 $ 424,000 ------------ Total Capital Goods $ 682,125 ---------------------------------------------------------------------------------------------------------------- TRANSPORTATION -- 0.2% Airlines -- 0.2% 500,000 BB/Ba3 Delta Air Lines 2010-2 Class B Pass Through Trust, 6.75%, 11/23/15 $ 502,500 ------------ Total Transportation $ 502,500 ---------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 18 Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 ---------------------------------------------------------------------------------------------------------- Principal Floating S&P/Moody's Amount ($) Rate (b) Ratings Value ---------------------------------------------------------------------------------------------------------- CONSUMER SERVICES -- 0.2% Specialized Consumer Services -- 0.2% 430,000 BB-/Ba3 Service Corp International United States, 7.0%, 5/15/19 $ 459,562 ------------ Total Consumer Services $ 459,562 ---------------------------------------------------------------------------------------------------------- HEALTH CARE EQUIPMENT & SERVICES -- 0.6% Health Care Equipment -- 0.3% 750,000 B+/B2 Physio-Control International, Inc., 9.875%, 1/15/19 (144A) $ 796,875 ---------------------------------------------------------------------------------------------------------- Health Care Facilities -- 0.3% 500,000 B+/B1 Aviv Healthcare Properties LP, 7.75%, 2/15/19 $ 520,000 500,000 BB/Ba3 HCA, Inc., 7.875%, 2/15/20 555,000 ------------ $ 1,075,000 ------------ Total Health Care Equipment & Services $ 1,871,875 ---------------------------------------------------------------------------------------------------------- BANKS -- 0.3% Diversified Banks -- 0.1% 235,000 6.52 BB+/Ba3 ABN Amro North American Holding Preferred Capital Repackage Trust I, Floating Rate Note, 12/29/49 (Perpetual) (144A) $ 207,975 ---------------------------------------------------------------------------------------------------------- Regional Banks -- 0.2% 200,000 8.70 BBB/Baa3 PNC Preferred Funding Trust III, Floating Rate Note, 3/29/49 (Perpetual) (144A) $ 205,020 450,000 5.46 BBB+/Baa1 State Street Capital Trust III, Floating Rate Note, 1/29/49 (Perpetual) 451,764 ------------ $ 656,784 ------------ Total Banks $ 864,759 ---------------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 0.7% Other Diversified Financial Services -- 0.5% 250,000 9.00 BB-/NR Compass Re, Ltd., Floating Rate Note, 1/8/15 (Cat Bond) (144A) $ 246,325 250,000 10.25 BB-/NR Compass Re, Ltd., Floating Rate Note, 1/8/15 (Cat Bond) (144A) 246,225 250,000 0.00 BB/NR East Lane Re V, Ltd., Floating Rate Note, 3/16/16 (Cat Bond) (144A) 248,050 300,000 8.35 BB-/NR Ibis Re II, Ltd., Floating Rate Note, 2/5/15 (Cat Bond) (144A) 296,190 250,000 6.00 BB/NR Lodestone Re, Ltd., Floating Rate Note, 1/8/14 (Cat Bond) (144A) 242,250 300,000 7.50 BB-/NR Queen Street IV Capital, Ltd., Floating Rate Note, 4/9/15 (Cat Bond) (144A) 285,480 ------------ $ 1,564,520 ---------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 19 Schedule of Investments | 4/30/12 (unaudited) (continued) ----------------------------------------------------------------------------------------------------- Principal Floating S&P/Moody's Amount ($) Rate (b) Ratings Value ----------------------------------------------------------------------------------------------------- Multi-Sector Holdings -- 0.2% 500,000 B/B2 Constellation Enterprises LLC, 10.625%, 2/1/16 (144A) $ 502,500 ------------ Total Diversified Financials $ 2,067,020 ----------------------------------------------------------------------------------------------------- INSURANCE -- 0.4% Reinsurance -- 0.4% 250,000 0.00 NR/Baa1 Combine Re, Ltd., Floating Rate Note, 1/7/15 (Cat Bond) (144A) $ 249,500 250,000 9.00 BB/NR Mystic Re, Ltd., Floating Rate Note, 3/12/15 (Cat Bond) (144A) 247,475 250,000 11.00 NR/B2 Successor X, Ltd., Floating Rate Note, 1/27/15 (Cat Bond) (144A) 240,750 250,000 11.25 B-/NR Successor X, Ltd., Floating Rate Note, 11/10/15 (Cat Bond) (144A) 239,275 250,000 9.70 B/NR Successor X, Ltd., Floating Rate Note, 2/25/14 (Cat Bond) (144A) 240,000 ------------ $ 1,217,000 ------------ Total Insurance $ 1,217,000 ----------------------------------------------------------------------------------------------------- SOFTWARE & SERVICES -- 0.1% Data Processing & Outsourced Services -- 0.1% 250,000 B+/B1 First Data Corp., 8.875%, 8/15/20 (144A) $ 271,875 ------------ Total Software & Services $ 271,875 ----------------------------------------------------------------------------------------------------- TELECOMMUNICATION SERVICES -- 0.4% Alternative Carriers -- 0.1% 350,000 BB-/WR PAETEC Holding Corp., 8.875%, 6/30/17 $ 382,375 ----------------------------------------------------------------------------------------------------- Integrated Telecommunication Services -- 0.2% 500,000 B/B1 Cincinnati Bell, Inc., 8.375%, 10/15/20 $ 500,000 ----------------------------------------------------------------------------------------------------- Wireless Telecommunication Services -- 0.1% 365,000 B+/Ba2 Cricket Communications, Inc., 7.75%, 5/15/16 $ 384,162 ------------ Total Telecommunication Services $ 1,266,537 ----------------------------------------------------------------------------------------------------- UTILITIES -- 0.1% Gas Utilities -- 0.1% 250,000 B+/B2 Ferrellgas LP, 6.5%, 5/1/21 $ 228,125 ------------ Total Utilities $ 228,125 ----------------------------------------------------------------------------------------------------- TOTAL CORPORATE BONDS (Cost $11,527,088) $ 11,827,829 ----------------------------------------------------------------------------------------------------- SENIOR FLOATING RATE LOAN INTERESTS -- 93.5%** ENERGY -- 2.8% Oil & Gas Equipment & Services -- 1.1% 207,916 2.74 B/NR Fenwal, Inc., Delayed Draw First-Lien Term Loan, 2/28/14 $ 204,017 1,212,397 2.74 B/NR Fenwal, Inc., Initial First-Lien Term Loan, 2/22/14 1,189,664 The accompanying notes are an integral part of these financial statements. 20 Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 ------------------------------------------------------------------------------------------------------------ Principal Floating S&P/Moody's Amount ($) Rate (b) Ratings Value ------------------------------------------------------------------------------------------------------------ Oil & Gas Equipment & Services -- (continued) 1,817,822 6.25 B+/B2 FTS International Services LLC, Term Loan, 4/19/16 $ 1,755,712 128,066 8.50 B-/B2 Hudson Products Holdings,, Inc., Term Loan, 8/24/15 118,461 ------------ $ 3,267,854 ------------------------------------------------------------------------------------------------------------ Integrated Oil & Gas -- 0.6% 1,698,232 4.50 BBB/Baa2 Glenn Pool Oil & Gas Trust, Term Loan, 6/1/16 $ 1,736,443 ------------------------------------------------------------------------------------------------------------ Oil & Gas Exploration & Production -- 0.5% 1,500,000 0.00 NR/Ba3 EP Energy LLC, 5/1/18 $ 1,518,195 ------------------------------------------------------------------------------------------------------------ Oil & Gas Refining & Marketing -- 0.5% 1,622,186 4.25 BBB-/Ba2 Pilot Travel Centers LLC, Initial Tranche B Term Loan, 3/7/18 $ 1,630,550 ------------------------------------------------------------------------------------------------------------ Coal & Consumable Fuels -- 0.1% 250,000 0.00 NR/NR Bumi Resources Tbk PT, Loan, 8/15/13 $ 250,000 ------------ Total Energy $ 8,403,042 ------------------------------------------------------------------------------------------------------------ MATERIALS -- 11.4% Commodity Chemicals -- 2.0% 2,964,981 6.00 B/B2 CPG International I, Inc., Term Loan, 1/26/17 $ 2,861,207 1,971,425 6.75 B/B1 Houghton International, Inc., B-1 Term Loan, 1/11/16 1,981,282 475,000 6.25 BB-/B1 Taminco Group NV, Dollar Term Loan, 12/16/18 480,641 392,857 4.25 NR/Ba2 Tronox, Inc., Closing Date Term Loan, 1/24/17 393,664 107,143 1.00 NR/Ba2 Tronox, Inc., Delayed Draw Term Loan, 1/24/17 107,310 ------------ $ 5,824,104 ------------------------------------------------------------------------------------------------------------ Diversified Chemicals -- 1.7% 600,868 5.00 B/B1 General Chemical Holding Co., New Tranche B Term Loan, 3/9/18 $ 603,722 725,000 0.00 NR/NR Ineos Group Holdings, Ltd., 5/4/18 729,531 EURO 472,186 8.00 B+/Ba3 Ineos Group Holdings, Ltd., Term C1 Facility (New), 12/16/14 659,162 31,480 8.00 B+/Ba3 Ineos US Finance LLC, Senior Credit Facility Term C2, 12/16/14 32,740 EURO 984,416 3.90 B-/Ba3 Momentive Performance Materials, Inc., Tranche B-2B Term Loan, 5/5/15 1,244,386 195,956 3.50 BB+/Ba1 Solutia, Inc., Term-1 Loan, 8/16/17 196,119 1,654,063 5.00 B+/B2 Univar, Term B Loan, 2/14/17 1,659,084 ------------ $ 5,124,744 ------------------------------------------------------------------------------------------------------------ Specialty Chemicals -- 3.1% 1,864,955 3.75 BB/Baa3 Ashland, Inc., Term B Loan, 5/31/18 $ 1,870,205 1,750,000 5.50 BB+/Ba1 Chemtura Corp., Term Facility, 8/11/16 1,766,406 The accompanying notes are an integral part of these financial statements. Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 21 Schedule of Investments | 4/30/12 (unaudited) (continued) ----------------------------------------------------------------------------------------------------- Principal Floating S&P/Moody's Amount ($) Rate (b) Ratings Value ----------------------------------------------------------------------------------------------------- Specialty Chemicals -- (continued) 877,494 2.85 BB+/Ba1 Huntsman International LLC, Extended Term B Loan, 4/19/17 $ 873,420 497,500 6.75 NR/B1 Norit NV, USD Term Loan, 6/21/17 503,097 1,990,000 5.75 BB-/Ba2 OM Group, Inc., Term B Dollar Loan, 7/5/17 2,004,925 1,582,475 5.75 B+/Ba2 Omnova Solutions, Inc., Extended Loan, 4/12/17 1,590,387 633,412 5.00 BB-/Ba1 PolyOne Corp., Term Loan, 9/30/17 637,371 ------------ $ 9,245,811 ----------------------------------------------------------------------------------------------------- Construction Materials -- 0.2% 750,000 6.00 BB-/B1 Summit Materials LLC, Term Loan, 1/12/19 $ 757,031 ----------------------------------------------------------------------------------------------------- Metal & Glass Containers -- 0.4% 1,027,972 4.50 B/Ba3 BWAY Holding Co., Replacement B Term Loan, 2/9/18 $ 1,031,826 97,458 4.50 B/Ba3 ICL Industrial Containers ULC, Replacement C Term Loan, 2/9/18 97,823 ------------ $ 1,129,649 ----------------------------------------------------------------------------------------------------- Paper Packaging -- 0.4% 1,080,750 4.75 BB+/Ba1 Sealed Air Corp., Term B Advance, 5/31/18 $ 1,094,265 ----------------------------------------------------------------------------------------------------- Aluminum -- 0.6% 275,000 5.75 BB-/Ba2 Noranda Aluminum Holding Corp., Term B Loan, 2/17/19 $ 277,750 1,481,250 4.00 BB-/Ba2 Novelis, Inc. Georgia, Term Loan, 3/11/17 1,484,269 ------------ $ 1,762,019 ----------------------------------------------------------------------------------------------------- Diversified Metals & Mining -- 0.6% 600,463 4.00 BB+/Ba1 SunCoke Energy, Inc., Tranche B Term Loan, 7/21/18 $ 601,964 1,185,563 4.00 BB-/B1 Walter Energy, Inc., B Term Loan, 2/3/18 1,187,050 ------------ $ 1,789,041 ----------------------------------------------------------------------------------------------------- Precious Metals & Minerals -- 0.7% 2,243,750 5.25 BB-/B1 Fairmount Minerals, Ltd., Tranche B Term Loan, 3/1/17 $ 2,251,884 ----------------------------------------------------------------------------------------------------- Steel -- 0.7% 1,980,008 4.75 BB/B1 JMC Steel Group, Term Loan, 2/15/17 $ 1,994,858 ----------------------------------------------------------------------------------------------------- Paper Products -- 1.0% 2,044,550 6.50 B/B1 Exopack Holding Corp., Term Loan B, 5/6/17 $ 2,044,550 884,843 4.75 BB-/Ba3 Ranpak Corp., USD Term Loan (First Lien), 3/28/17 887,055 ------------ $ 2,931,605 ------------ Total Materials $ 33,904,984 ----------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 22 Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 ----------------------------------------------------------------------------------------------------------- Principal Floating S&P/Moody's Amount ($) Rate (b) Ratings Value ----------------------------------------------------------------------------------------------------------- CAPITAL GOODS -- 9.9% Aerospace & Defense -- 5.6% 2,033,721 8.75 B+/B3 API Technologies Corp., Term Loan, 6/1/16 $ 2,033,721 250,000 4.75 BBB-/Ba3 Delos Aircraft, Inc., Term Loan, 3/17/16 251,538 748,125 5.75 BB+/Ba3 DigitalGlobe, Inc., Term Loan, 9/21/18 739,700 1,026,165 5.47 B/B2 DUBAI AEROSPACE ENTERPRISE (DAE), Tranche B-1 Loan, 7/31/14 1,026,165 978,296 5.47 B/B2 DUBAI AEROSPACE ENTERPRISE (DAE), Tranche B-2 Loan, 7/31/14 978,296 1,281,098 6.25 BB-/Ba2 DynCorp International, Inc., Term Loan, 7/7/16 1,284,311 992,500 7.00 B/B3 Global Defense Technology & Systems, Inc., Term B Loan, 4/22/17 990,019 1,451,338 6.49 BB/B1 Hunter Defense Technologies, Inc., Series 1 New Term Loan, 8/22/14 1,284,434 381,846 3.49 BB-/B1 Hunter Defense Technologies, Inc., Term Loan, 8/22/14 339,843 1,751,054 9.25 CCC/WR IAP Worldwide Services, Inc., Term Loan (First- Lien), 12/20/12 1,580,326 1,500,000 3.72 B-/B1 Sequa Corp., Term Loan, 12/3/14 1,487,500 1,975,000 4.50 B+/Ba3 SI Organization, Inc., New Tranche B Term Loan, 11/22/16 1,945,375 500,000 3.75 BBB-/Ba1 Spirit Aerosystems, Inc., Term B Loan, 3/27/19 502,500 2,179,632 4.50 BB-/B1 Tasc, Inc., New Tranche B Term Loan, 4/25/15 2,168,734 ------------ $ 16,612,462 ----------------------------------------------------------------------------------------------------------- Building Products -- 1.3% 594,471 4.00 BB-/B1 Armstrong World Industries, Inc., Term Loan B-1, 3/8/18 $ 595,957 1,557,360 5.75 B+/B1 Custom Building Products, Inc., Term Loan, 3/19/15 1,559,306 1,303,167 5.75 B+/B1 Goodman Global Group, Inc., Initial Term Loan (First Lien), 10/6/16 1,313,871 498,750 7.00 B+/B2 Unifrax Corp., Term Dollar Loan, 10/27/18 505,296 ------------ $ 3,974,430 ----------------------------------------------------------------------------------------------------------- Electrical Components & Equipment -- 0.5% 1,439,298 5.75 B+/B1 Scotsman Industries, Inc., Term Loan, 4/30/16 $ 1,441,097 ----------------------------------------------------------------------------------------------------------- Industrial Conglomerates -- 0.4% 1,105,227 6.25 B+/B2 Pro Mach, Inc., Term Loan, 7/6/17 $ 1,088,649 ----------------------------------------------------------------------------------------------------------- Construction & Farm Machinery & Heavy Trucks -- 0.8% 1,139,275 5.50 BB/Ba2 Terex Corp., U.S. Term Loan, 4/28/17 $ 1,150,668 1,232,550 4.25 BB/Ba2 The Manitowoc Co, Inc., Term B Loan, 10/11/17 1,234,091 ------------ $ 2,384,759 ----------------------------------------------------------------------------------------------------------- Industrial Machinery -- 1.3% 997,500 4.50 BB+/Ba2 Colfax Corp., Term B Facility, 9/12/18 $ 1,001,945 The accompanying notes are an integral part of these financial statements. Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 23 Schedule of Investments | 4/30/12 (unaudited) (continued) ----------------------------------------------------------------------------------------------------- Principal Floating S&P/Moody's Amount ($) Rate (b) Ratings Value ----------------------------------------------------------------------------------------------------- Industrial Machinery -- (continued) 750,000 0.00 NR/NR Schaeffler AG, Facility C2 Term Loan, 1/27/17 $ 754,688 485,139 4.25 BB/Ba2 Trimas Corp., Tranche B Term Loan, 5/27/17 486,352 1,714,948 5.50 BB-/Ba2 Xerium Technologies, Inc., Initial U.S. Term Loan, 5/4/17 1,706,373 ------------ $ 3,949,358 ----------------------------------------------------------------------------------------------------- Total Capital Goods $ 29,450,755 ----------------------------------------------------------------------------------------------------- COMMERCIAL SERVICES & SUPPLIES -- 4.6% Commercial Printing -- 0.6% 1,639,420 6.25 BB-/Ba3 Cenveo Corp., Term B Facility, 12/15/16 $ 1,645,302 ----------------------------------------------------------------------------------------------------- Environmental & Facilities Services -- 1.5% 526,693 8.75 NR/WR Aquilex Holdings LLC, Term Loan, 4/1/16 $ 522,743 1,362,854 7.25 B+/B1 Brickman Group Holdings, Inc., Tranche B Term Loan, 9/21/16 1,379,038 700,000 4.00 BB+/Ba1 Covanta Holding Corp., Term Loan, 3/1/19 702,625 214,238 2.25 B-/Caa1 Synagro Technologies, Inc., Term Loan (First Lien), 4/2/14 194,421 1,298,661 4.50 B+/B1 Waste Industries USA, Inc., Term B Loan, 2/23/17 1,298,661 370,000 5.50 B+/B1 WCA Waste Corp., Term Loan, 3/1/18 371,850 ------------ $ 4,469,338 ----------------------------------------------------------------------------------------------------- Diversified Support Services -- 1.3% 1,390,950 5.25 B+/Ba3 Allied Security Holdings LLC, Term Loan (First Lien), 1/21/17 $ 1,395,586 707,270 5.75 B+/B1 infoGROUP, Inc., Term B Loan, 5/10/18 643,616 818,812 5.00 BB-/Ba3 KAR Auction Services, Inc., Term Loan, 4/26/17 824,100 950,997 6.25 B+/Ba3 Language Line Services Holdings, Inc., Tranche B Term Loan, 5/30/16 953,375 ------------ $ 3,816,677 ----------------------------------------------------------------------------------------------------- Security & Alarm Services -- 0.7% 2,171,377 5.75 B+/B1 Protection One, Inc., Term Loan 2012, 3/20/19 $ 2,168,608 ----------------------------------------------------------------------------------------------------- Research & Consulting Services -- 0.5% 1,581,455 5.75 BB/B1 Wyle Services Corp., Term Loan (First Lien), 3/31/17 $ 1,579,479 ------------ Total Commercial Services & Supplies $ 13,679,404 ----------------------------------------------------------------------------------------------------- TRANSPORTATION -- 3.0% Air Freight & Logistics -- 0.7% 731,882 5.47 NR/NR CEVA Group Plc, Dollar Tranche B Pre Funded L/C, 8/31/16 $ 691,628 301,545 5.47 NR/NR CEVA Group Plc, EGL Tranche B Term Loan, 8/31/16 284,206 The accompanying notes are an integral part of these financial statements. 24 Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 ------------------------------------------------------------------------------------------------------ Principal Floating S&P/Moody's Amount ($) Rate (b) Ratings Value ------------------------------------------------------------------------------------------------------ Air Freight & Logistics -- (continued) 1,033,502 5.47 NR/Ba3 CEVA Group Plc, US Tranche B Term Loan, 8/31/16 $ 976,659 ------------ $ 1,952,493 ------------------------------------------------------------------------------------------------------ Airlines -- 1.4% 1,237,500 5.75 BB-/Ba3 Allegiant Travel Co., Term Loan, 2/17/17 $ 1,241,110 321,750 4.25 BB-/Ba2 Delta Air Lines, Inc., 2009 Term Loan, 2/22/16 316,119 1,786,500 5.50 BB-/Ba2 Delta Air Lines, Inc., Term Loan 2011, 3/29/17 1,790,966 978,173 2.25 BB-/Ba3 United Air Lines, Inc., Tranche B Loan, 2/1/14 970,837 ------------ $ 4,319,032 ------------------------------------------------------------------------------------------------------ Railroads -- 0.3% 750,000 4.00 BB+/B1 RailAmerica, Inc., Initial Loan, 2/15/19 $ 753,281 ------------------------------------------------------------------------------------------------------ Trucking -- 0.6% 1,832,584 5.00 BB/B1 Swift Transportation Co., Tranche B-2 Term Loan, 12/15/17 $ 1,852,033 ------------ Total Transportation $ 8,876,839 ------------------------------------------------------------------------------------------------------ AUTOMOBILES & COMPONENTS -- 4.7% Auto Parts & Equipment -- 3.3% 883,415 2.74 BB-/Ba3 Allison Transmission, Inc., Term B-1 Loan, 8/7/14 $ 882,588 976,421 3.50 BBB/Baa2 Delphi Automotive LLP, Tranche B Term Loan, 3/31/17 980,693 909,231 2.18 B+/Ba3 Federal-Mogul Corp., Tranche B Term Loan, 12/29/14 882,006 463,893 2.18 B+/Ba3 Federal-Mogul Corp., Tranche C Term Loan, 12/28/15 450,003 2,199,592 7.00 B+/B2 HHI Holdings LLC, Term Loan, 3/9/17 2,210,590 1,930,499 5.25 B+/NR Metaldyne Corp., Term Loan, 5/2/17 1,942,565 915,890 6.25 B+/B1 Remy International, Inc., Term B Facility, 12/17/16 920,851 715,000 6.75 NR/NR TI Group Automotive Systems LLC, Term Loan, 3/1/19 718,575 636,943 4.25 BB/Ba2 Tomkins LLC, Term B-1 Loan, 9/21/16 639,933 281,438 5.50 B+/Ba2 UCI International, Inc., Term Loan, 7/4/17 282,845 ------------ $ 9,910,649 ------------------------------------------------------------------------------------------------------ Tires & Rubber -- 0.6% 1,925,000 4.75 BB/Ba1 The Goodyear Tire & Rubber Co., Second Lien (Extended), 3/27/19 $ 1,900,337 ------------------------------------------------------------------------------------------------------ Automobile Manufacturers -- 0.8% 2,277,763 6.00 BB/Ba2 Chrysler Group LLC, Tranche B Term Loan, 4/28/17 $ 2,323,621 ------------ Total Automobiles & Components $ 14,134,607 ------------------------------------------------------------------------------------------------------ The accompanying notes are an integral part of these financial statements. Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 25 Schedule of Investments | 4/30/12 (unaudited) (continued) ----------------------------------------------------------------------------------------------------- Principal Floating S&P/Moody's Amount ($) Rate (b) Ratings Value ----------------------------------------------------------------------------------------------------- CONSUMER DURABLES & APPAREL -- 1.6% Housewares & Specialties -- 1.3% 856,439 5.26 BB-/Ba3 Prestige Brands, Inc., Term B Loan, 12/20/18 $ 863,264 1,958,643 6.50 BB/Ba3 Reynolds Group Holdings, Ltd., Tranche B Term Loan, 2/9/18 1,989,253 980,000 5.25 B+/B1 Yankee Candle Co, Inc., Initial Term Loan, 3/2/19 988,575 ------------ $ 3,841,092 ----------------------------------------------------------------------------------------------------- Leisure Products -- 0.3% 986,544 2.24 B/B1 SABRE INC, Non-Extended Initial Term Loan, 9/30/14 $ 951,604 ------------ Total Consumer Durables & Apparel $ 4,792,696 ----------------------------------------------------------------------------------------------------- CONSUMER SERVICES -- 6.3% Casinos & Gaming -- 1.9% 490,218 4.00 BB+/Ba3 Ameristar Casinos, Inc., B Term Loan, 3/29/18 $ 493,129 987,500 6.00 BB-/Ba3 Boyd Gaming Corp., Increased Term Loan, 12/17/15 999,844 122,188 9.50 B/B2 Caesars Entertainment Operating Co, Inc., Term B-4 Loan, 10/31/16 125,914 930,000 5.49 B/B2 Caesars Entertainment Operating Co, Inc., Term B-6 Loan, 1/28/18 852,445 984,962 2.85 BBB-/Ba2 Las Vegas Sands Corp., Delayed Draw II Term Loan (Extending), 11/23/16 973,882 992,500 3.75 BBB-/Ba1 Penn National Gaming, Inc., Term B Facility, 6/29/18 997,282 1,384,546 3.00 BBB-/Ba1 Scientific Games Corp., Tranche B-1 Term Loan, 6/30/15 1,377,623 ------------ $ 5,820,119 ----------------------------------------------------------------------------------------------------- Hotels, Resorts & Cruise Lines -- 0.1% 306,507 4.97 NR/B1 Travelport LLC, Extended Tranche B Dollar Term Loan, 8/23/15 $ 280,399 64,044 4.97 B/B1 Travelport LLC, Tranche S Term Loan, 8/23/15 58,589 ------------ $ 338,988 ----------------------------------------------------------------------------------------------------- Leisure Facilities -- 0.5% 734,809 4.00 BB/Ba2 Cedar Fair LP, U.S. Term-1 Loan, 12/15/17 $ 737,791 700,000 4.25 BB+/B1 Six Flags Entertainment Corp., Tranche B Term Loan, 11/23/18 701,695 ------------ $ 1,439,486 ----------------------------------------------------------------------------------------------------- Restaurants -- 2.5% 1,205,908 4.50 BB-/Ba3 Burger King Holdings, Inc., Tranche B Term Loan, 10/30/16 $ 1,211,179 1,113,752 4.25 BB-/Ba2 DineEquity, Inc., Term B-1 Loan, 10/31/17 1,117,825 1,925,000 6.50 B+/NR Landry's, Inc., B Term Loan, 3/22/18 1,927,707 The accompanying notes are an integral part of these financial statements. 26 Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 ------------------------------------------------------------------------------------------------------ Principal Floating S&P/Moody's Amount ($) Rate (b) Ratings Value ------------------------------------------------------------------------------------------------------ Restaurants -- (continued) 1,100,000 5.25 NR/NR NPC International, Inc., Term Loan 2012, 12/28/18 $ 1,108,250 1,295,000 0.00 BB-/NR Wendy's International, Inc., 4/3/19 1,303,418 700,033 5.00 BB/Ba2 Wendy's, Term Loan, 5/19/17 701,674 ------------ $ 7,370,053 ------------------------------------------------------------------------------------------------------ Education Services -- 0.8% 888,756 7.00 B/B1 Ascend Learning LLC, Term Loan (First Lien), 11/8/16 $ 893,940 1,532,646 4.24 BB-/Ba2 Bright Horizons Family Solutions, Inc., Tranche B Term Loan, 5/28/15 1,528,815 ------------ $ 2,422,755 ------------------------------------------------------------------------------------------------------ Specialized Consumer Services -- 0.5% 1,410,000 5.50 B/Ba3 Ascent Capital Group, Inc., Term Loan, 3/6/18 $ 1,423,219 ------------ Total Consumer Services $ 18,814,620 ------------------------------------------------------------------------------------------------------ MEDIA -- 7.2% Advertising -- 1.1% 1,481,250 5.25 B+/NR Advantage Sales & Marketing LLC, Term Loan (First Lien), 11/29/17 $ 1,482,176 1,467,503 5.00 B+/Ba3 Affinion Group, Inc., Tranche B Term Loan, 10/9/16 1,397,796 276,502 4.00 BB+/Baa3 Lamar Advertising Co., Term B Loan, 10/1/16 278,000 ------------ $ 3,157,972 ------------------------------------------------------------------------------------------------------ Broadcasting -- 2.4% 1,200,000 4.00 BB-/Ba2 Cequel Communications Holdings I LLC and Cequel Capital Corp., Term Loan, 1/31/19 $ 1,188,900 973,333 6.28 BB-/Ba3 Entercom Communications Corp., Term B Loan, 11/7/18 984,283 948,056 5.25 B+/Ba3 Hubbard Broadcasting, Inc., Term Loan (First Lien), 3/24/17 955,166 449,310 4.00 BB+/Ba1 Sinclair Broadcast Group, Inc., New Tranche B Term Loan, 10/29/16 451,276 2,210,000 4.25 NR/NR Telesat Canada, U.S. Term B Loan, 3/28/19 2,211,036 243,950 4.25 BB-/Ba3 TWCC Holding Corp., Term Loan, 1/24/17 245,384 1,207,255 4.49 B+/B2 Univision Communications, Inc., Extended First-Lien Term Loan, 3/29/17 1,129,161 ------------ $ 7,165,206 ------------------------------------------------------------------------------------------------------ Cable & Satellite -- 1.4% 1,500,000 4.00 BB+/Ba1 Charter Communications Operating LLC, Term D Loan, 3/28/19 $ 1,498,500 725,000 4.25 NR/NR Kabel Deutschland Vertrieb und Service GmbH, Facility F, 2/1/19 727,719 978,718 4.00 B+/B1 Knology, Inc., Term B Loan, 8/18/17 979,482 The accompanying notes are an integral part of these financial statements. Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 27 Schedule of Investments | 4/30/12 (unaudited) (continued) ----------------------------------------------------------------------------------------------------- Principal Floating S&P/Moody's Amount ($) Rate (b) Ratings Value ----------------------------------------------------------------------------------------------------- Cable & Satellite -- (continued) 491,250 4.50 BB-/Ba3 MCC Georgia LLC, Tranche F Term Loan, 10/20/17 $ 491,864 97,642 6.74 B-/B1 WideOpenWest LLC, Series A New Term Loan, 6/18/14 97,886 484,955 2.74 B-/B1 WideOpenWest LLC, Term Loan (First Lien), 6/30/14 483,137 ------------ $ 4,278,588 ----------------------------------------------------------------------------------------------------- Movies & Entertainment -- 1.0% 287,724 3.49 BB-/Ba2 AMC Entertainment, Inc., Term B-2 Loan (Extending), 12/15/16 $ 287,436 299,250 4.25 BB-/Ba2 AMC Entertainment, Inc., Term B-3 Loan, 2/7/18 299,203 904,711 5.25 NR/Ba1 Cinedigm Digital Funding I LLC, Term Loan, 3/31/16 903,014 980,000 4.50 BB-/Ba2 Live Nation Entertainment, Inc., Term B Loan, 10/20/16 981,634 399,219 6.50 B/B3 LodgeNet Interactive Corp., Closing Date Term Loan, 4/4/14 363,289 ------------ $ 2,834,576 ----------------------------------------------------------------------------------------------------- Publishing -- 1.3% 1,768,388 2.49 B/B2 Cengage Learning Acquisitions, Inc., Term Loan (Non Extending), 7/4/14 $ 1,622,180 2,235,859 4.50 B+/Ba3 Interactive Data Corp., Term B Loan, 1/31/18 2,245,362 0 0.00 D/Caa3 RH Donnelley, Inc., Loan, 10/24/14 0 ------------ $ 3,867,542 ------------ Total Media $ 21,303,884 ----------------------------------------------------------------------------------------------------- RETAILING -- 2.1% Apparel Retail -- 1.0% 1,980,000 4.75 B/B1 J Crew Group, Inc., Loan, 11/23/17 $ 1,965,150 997,500 5.75 BB/Ba3 Lord & Taylor LLC, Term Loan, 12/2/18 1,011,839 ------------ $ 2,976,989 ----------------------------------------------------------------------------------------------------- Computer & Electronics Retail -- 0.4% 1,305,138 11.00 B/B2 Targus Group International, Term Loan, 5/12/16 $ 1,301,875 ----------------------------------------------------------------------------------------------------- Home Improvement Retail -- 0.4% 1,050,824 5.00 B+/Ba3 Hillman Group, Inc., Term Loan, 5/31/16 $ 1,056,078 ----------------------------------------------------------------------------------------------------- Automotive Retail -- 0.3% 845,750 7.50 NR/B1 Stackpole International, Term Loan, 7/8/17 $ 852,093 ------------ Total Retailing $ 6,187,035 ----------------------------------------------------------------------------------------------------- FOOD & STAPLES RETAILING -- 1.4% Drug Retail -- 0.6% 1,836,922 4.50 B+/B3 Rite Aid Corp., Tranche 5 Term Loan, 2/17/18 $ 1,827,737 ----------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 28 Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 ------------------------------------------------------------------------------------------------------ Principal Floating S&P/Moody's Amount ($) Rate (b) Ratings Value ------------------------------------------------------------------------------------------------------ Food Distributors -- 0.6% 1,914,000 5.00 BB-/B1 Windsor Quality Food Co., Ltd., Tranche B Term Loan, 1/11/17 $ 1,847,010 ------------------------------------------------------------------------------------------------------ Food Retail -- 0.2% 375,000 5.75 BB-/B1 Roundy's Supermarkets, Inc., Tranche B Term Loan, 1/24/19 $ 378,844 ------------ Total Food & Staples Retailing $ 4,053,591 ------------------------------------------------------------------------------------------------------ FOOD, BEVERAGE & TOBACCO -- 1.1% Distillers & Vintners -- 0.0% 88,949 3.00 BB+/Ba1 Constellation Brands, Inc., Extending Tranche B Term Loan, 6/5/15 $ 89,134 ------------------------------------------------------------------------------------------------------ Agricultural Products -- 0.3% 987,008 5.50 B/B2 American Rock Salt Co. LLC, Term Loan, 4/1/17 $ 955,341 ------------------------------------------------------------------------------------------------------ Packaged Foods & Meats -- 0.8% 498,750 4.50 BB/Ba2 B&G Foods, Inc., Tranche B Term Loan, 10/28/18 $ 502,491 952,800 4.50 B/WR Del Monte Foods Co., Initial Term Loan, 2/3/18 947,440 869,950 4.25 B+/B1 Michael Foods, Inc., Term B Facility, 2/14/18 873,032 ------------ $ 2,322,963 ------------ Total Food, Beverage & Tobacco $ 3,367,438 ------------------------------------------------------------------------------------------------------ HOUSEHOLD & PERSONAL PRODUCTS -- 1.2% Household Products -- 0.4% 592,178 5.00 B/B1 Spectrum Brands Holdings, Inc., New Term Loan, 6/16/16 $ 595,065 533,703 4.78 B+/Ba3 SRAM Corp., Term Loan (First Lien), 5/12/18 541,375 ------------ $ 1,136,440 ------------------------------------------------------------------------------------------------------ Personal Products -- 0.8% 1,076,786 4.25 BB-/Ba3 NBTY, Inc., Term B-1 Loan, 10/1/17 $ 1,079,815 1,488,800 4.75 BB-/Ba3 Revlon, Inc., Term Loan B, 11/19/17 1,491,824 ------------ $ 2,571,639 ------------ Total Household & Personal Products $ 3,708,079 ------------------------------------------------------------------------------------------------------ HEALTH CARE EQUIPMENT & SERVICES -- 11.4% Health Care Equipment -- 0.9% 1,934,973 5.00 BB-/B1 Carestream Health, Inc., Term Loan, 2/8/17 $ 1,891,477 352,152 3.25 BBB-/Baa2 Fresenius SE & Co. KGaA, Tranche D2 Term Loan, 9/10/14 353,106 264,338 7.00 BB-/Ba2 Kinetic Concepts, Inc., Dollar Term B-1 Loan, 1/12/18 270,285 ------------ $ 2,514,868 ------------------------------------------------------------------------------------------------------ Health Care Supplies -- 0.2% 519,725 4.75 BB-/Ba3 Alere, Inc., B Term Loan, 6/15/17 $ 519,833 The accompanying notes are an integral part of these financial statements. Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 29 Schedule of Investments | 4/30/12 (unaudited) (continued) ------------------------------------------------------------------------------------------------------- Principal Floating S&P/Moody's Amount ($) Rate (b) Ratings Value ------------------------------------------------------------------------------------------------------- Health Care Supplies -- (continued) 37,729 3.49 B+/B1 Bausch & Lomb, Inc., Delayed Draw Term Loan, 4/24/15 $ 37,749 154,408 3.67 B+/B1 Bausch & Lomb, Inc., Parent Term Loan, 4/24/15 154,491 ------------ $ 712,073 ------------------------------------------------------------------------------------------------------- Health Care Services -- 5.0% 841,146 6.50 NR/NR AccentCare, Inc., Term Loan, 12/22/16 $ 767,546 1,146,179 7.25 B+/Ba3 Alliance HealthCare Services, Inc., Initial Term Loan, 6/1/16 1,100,332 435,505 4.50 BB/B1 Butler Animal Health Supply LLC, Tranche B Term Loan, 12/31/15 436,594 920,556 5.25 B+/B1 Emergency Medical Services Corp., Initial Term Loan, 4/5/18 924,818 1,696,118 6.50 B/B1 Gentiva Health Services, Inc., Term B1 Term Loan, 2/22/16 1,617,673 1,671,864 6.50 BB-/Ba3 inVentiv Health, Inc., Consolidated Term Loan, 8/4/16 1,586,181 1,747,350 7.00 B+/B1 National Mentor Holdings, Inc., Tranche B Term Loan, 1/18/17 1,734,974 1,686,004 8.25 B/B2 National Surgical Hospitals, Inc., Initial Term Loan, 1/4/17 1,610,134 565,320 7.50 NR/B1 Prime Healthcare Services, Term B Loan, 4/28/15 562,493 1,042,125 5.75 B+/Ba3 Rural Metro Corp., Term Loan (First Lien), 3/28/18 1,043,428 1,574,931 8.75 BB-/Ba1 Sun Healthcare Group, Inc., Term Loan, 10/18/16 1,551,307 983,750 6.50 B/B1 Surgery Center Holdings, Inc., Term Loan, 9/20/16 939,481 1,234,375 7.25 B+/B1 Virtual Radiologic Corp., Term Loan A, 11/3/16 1,147,969 ------------ $ 15,022,930 ------------------------------------------------------------------------------------------------------- Health Care Facilities -- 2.6% 828,698 6.50 B/B1 Ardent Medical Services, Inc., Term Loan, 9/15/15 $ 831,805 1,003,404 3.99 BB/Ba3 Community Health Systems, Inc., Extended Term Loan, 7/25/14 993,281 83,654 3.49 BB/Ba3 HCA Holdings, Inc., Tranche B-3 Term Loan, 5/1/18 82,399 1,450,619 3.72 BB/Ba3 HCA, Inc., Tranche B-2 Term Loan, 3/17/17 1,431,080 1,089,000 5.00 B/Ba3 IASIS Healthcare LLC, Term B Loan, 4/18/18 1,093,425 1,262,944 5.25 B+/Ba3 Kindred Healthcare, Inc., Term Loan, 2/7/18 1,215,583 916,819 5.50 BB-/Ba3 Select Medical Holdings Corp., Tranche B Term Loan, 4/25/18 894,662 The accompanying notes are an integral part of these financial statements. 30 Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 -------------------------------------------------------------------------------------------------------- Principal Floating S&P/Moody's Amount ($) Rate (b) Ratings Value -------------------------------------------------------------------------------------------------------- Health Care Facilities -- (continued) 330,671 0.00 B/NR United Surgical Partners International, Inc., New Tranche B Term Loan, 4/3/19 $ 331,704 778,617 3.75 BB+/Ba2 Universal Health Services, Inc., Tranche B Term Loan 2011, 11/30/16 780,563 ------------ $ 7,654,502 -------------------------------------------------------------------------------------------------------- Managed Health Care -- 0.5% 782,500 8.50 B+/B1 Aveta, Inc., MMM Term Loan, 3/20/17 $ 781,522 782,500 8.50 B+/B1 Aveta, Inc., NAMM Term Loan, 4/4/17 784,456 ------------ $ 1,565,978 -------------------------------------------------------------------------------------------------------- Health Care Technology -- 2.2% 1,452,005 5.75 B+/Ba3 Convatec, Inc., Dollar Term Loan, 12/1/16 $ 1,454,727 1,270,000 5.00 BB-/Ba3 Emdeon, Inc., Term B-1 Loan, 11/2/18 1,282,382 987,260 4.50 BB/Ba3 IMS Health, Inc., Tranche B Dollar Term Loan (2011), 8/31/17 992,615 1,817,520 5.25 BB-/Ba3 MedAssets, Inc., Term Loan, 11/15/16 1,834,181 114,796 6.25 B/NR Physician Oncology Services LP, Delayed Draw Term Loan, 1/31/17 110,778 944,911 6.25 B/B2 Physician Oncology Services LP, Effective Date Term Loan, 2/10/17 911,839 ------------ $ 6,586,522 ------------ Total Health Care Equipment & Services $ 34,056,873 -------------------------------------------------------------------------------------------------------- PHARMACEUTICALS, BIOTECHNOLOGY & LIFE SCIENCES -- 3.6% Biotechnology -- 2.4% 1,886,867 5.50 BB/B2 Axcan Intermediate Holdings, Inc., Term B-1 Loan, 1/25/17 $ 1,870,948 689,203 3.25 BBB-/Baa2 Fresenius Kabi Pharmaceuticals Holding, Inc., Tranche D1 Dollar Term Loan, 9/10/14 690,788 374,952 6.50 B+/B1 Generic Drug Holdings, Inc., Closing Date Term Loan, 4/7/16 374,014 51,555 6.50 B+/B1 Generic Drug Holdings, Inc., Delayed Draw Term Loan, 4/8/16 51,426 2,504,247 4.50 BB-/Ba3 Grifols, Inc., New U.S. Tranche B Term Loan, 6/4/17 2,513,243 974,291 6.75 BB-/B1 HGI Holdings, Inc., Initial Term Loan, 7/27/16 977,539 226,286 4.25 BBB-/Ba3 Warner Chilcott Corp., Term B-1 Loan, 3/3/18 227,205 113,143 4.25 BBB-/Ba3 Warner Chilcott Corp., Term B-2 Loan, 3/17/18 113,603 155,571 4.25 BBB-/Ba3 WC Luxco Sarl, Term B-3 Loan, 3/3/18 156,204 ------------ $ 6,974,970 -------------------------------------------------------------------------------------------------------- Pharmaceuticals -- 0.8% 1,573,899 2.49 B+/B1 Key Safety Systems, Inc., Term Loan (First Lien), 3/8/14 $ 1,517,501 843,625 6.50 B+/B2 Medpace, Inc., Term B Loan, 5/20/17 822,534 ------------ $ 2,340,035 -------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 31 Schedule of Investments | 4/30/12 (unaudited) (continued) ------------------------------------------------------------------------------------------------------- Principal Floating S&P/Moody's Amount ($) Rate (b) Ratings Value ------------------------------------------------------------------------------------------------------- Life Sciences Tools & Services -- 0.4% 1,271,804 4.24 BB-/Ba3 Catalent Pharma Solutions, Inc., Extended Dollar Term-1 Loan, 9/15/16 $ 1,274,189 ------------ Total Pharmaceuticals, Biotechnology & Life Sciences $ 10,589,194 ------------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 3.5% Other Diversified Financial Services -- 2.6% 437,825 5.00 B+/B1 BNY ConvergEx Group LLC, Term Loan First Lien (EZE), 12/16/16 $ 437,552 994,244 5.00 B+/B1 BNY ConvergEx Group LLC, Term Loan First Lien (TOP), 12/16/16 993,623 221,684 8.75 B-/B2 BNY ConvergEx Group LLC, Term Loan Second Lien (EZE), 11/29/17 220,160 528,316 8.75 B-/B2 BNY ConvergEx Group LLC, Term Loan Second Lien (TOP), 12/16/17 524,684 1,237,500 5.00 NR/Baa1 Kasima LLC, Incremental Term Loan, 3/25/17 1,242,141 1,089,000 5.00 B/B1 Nexeo Solutions LLC, Initial Loans, 2/26/17 1,069,942 1,172,063 7.50 B+/B2 Preferred Sands Holding Co. LLC, Term B Loan, 12/15/16 1,160,342 1,295,007 7.25 NR/WR Vertrue, Inc., Term Loan (First Lien), 8/18/14 401,452 1,770,000 5.25 NR/Ba2 WorldPay, Facility B2A Term Loan, 8/6/17 1,769,170 ------------ $ 7,819,066 ------------------------------------------------------------------------------------------------------- Multi-Sector Holdings -- 0.3% 892,467 4.75 BB/Caa2 Fox Acquisition Sub LLC, Replacement Term Loan, 7/7/15 $ 896,651 ------------------------------------------------------------------------------------------------------- Specialized Finance -- 0.4% 748,125 7.75 B/B1 Hoffmaster Group, Inc., Term Loan (First Lien), 11/28/17 $ 744,384 500,000 0.00 B+/Ba3 Pinnacle Foods Finance LLC, 9/16/18 503,021 ------------ $ 1,247,405 ------------------------------------------------------------------------------------------------------- Consumer Finance -- 0.2% 500,000 5.50 CCC+/B2 Springleaf Finance Corp., Initial Loan, 5/28/17 $ 474,625 ------------------------------------------------------------------------------------------------------- Investment Banking & Brokerage -- 0.0% 100,000 4.00 NR/Ba2 LPL Holdings, Inc., Initial Tranche B Term Loan, 3/6/19 $ 100,297 ------------ Total Diversified Financials $ 10,538,044 ------------------------------------------------------------------------------------------------------- INSURANCE -- 1.6% Insurance Brokers -- 0.8% 228,074 3.47 B-/B2 Alliant Holdings I, Inc., Term Loan, 8/21/14 $ 228,612 953,885 6.75 B-/B2 Alliant Holdings I, Inc., Tranche D Incremental Loan, 8/21/14 965,877 97,500 6.75 B+/B1 HUB International Holdings, Inc., 2014 Additional Term Loan, 6/13/14 98,393 The accompanying notes are an integral part of these financial statements. 32 Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 ----------------------------------------------------------------------------------------------------- Principal Floating S&P/Moody's Amount ($) Rate (b) Ratings Value ----------------------------------------------------------------------------------------------------- Insurance Brokers -- (continued) 87,466 2.97 B+/B1 HUB International Holdings, Inc., 2014 Delayed Draw Term Loan, 6/13/14 $ 87,319 389,093 2.97 B+/B1 HUB International Holdings, Inc., 2014 Initial Term Loan, 6/13/14 387,753 671,136 2.74 B/B1 USI Holdings Corp., Tranche B Term Loan, 5/5/14 660,510 ------------ $ 2,428,464 ----------------------------------------------------------------------------------------------------- Life & Health Insurance -- 0.6% 1,739,269 6.25 NR/NR CNO Financial Group, Inc., B-1 Loan, 9/30/16 $ 1,753,401 ----------------------------------------------------------------------------------------------------- Multi-line Insurance -- 0.2% 484,981 4.49 B/B1 AmWINS Group, Inc., Initial Term Loan, 6/8/13 $ 484,678 ------------ Total Insurance $ 4,666,543 ----------------------------------------------------------------------------------------------------- REAL ESTATE -- 1.0% Real Estate Development -- 0.3% 1,088,636 8.25 B-/B1 Ozburn-Hessey Logistics LLC, Term Loan (First Lien), 4/7/16 $ 960,722 ----------------------------------------------------------------------------------------------------- Real Estate Services -- 0.7% 992,500 3.49 BB/Ba1 CBRE Group, Inc., Incremental Tranche C Term Loan, 2/17/18 $ 990,225 992,500 3.74 BB/Ba1 CBRE Group, Inc., Incremental Tranche D Term Loan, 8/17/19 990,225 ------------ $ 1,980,450 ------------ Total Real Estate $ 2,941,172 ----------------------------------------------------------------------------------------------------- SOFTWARE & SERVICES -- 5.7% Data Processing & Outsourced Services -- 1.5% 954,714 5.50 BB-/B1 CCC Information Services Group, Inc., Term Loan, 11/29/15 $ 962,662 85,714 4.25 BBB/Ba1 Fidelity National Information Services, Inc., Term B Loan, 7/18/16 86,250 67,341 5.24 B+/NR First Data Corp., 2017 Dollar Term Loan, 3/24/17 64,421 887,680 4.24 B+/B1 First Data Corp., 2018 Dollar Term Loan, 3/24/18 810,672 676,190 7.00 BB/B1 Global Cash Access Holdings, Inc., Term Loan, 2/1/16 680,417 1,019,875 5.00 BB+/Ba2 NeuStar, Inc., Term Advance Loan, 10/11/18 1,031,349 285,714 3.75 NR/NR Vantiv LLC, Tranche B Term Loan, 2/22/19 285,714 599,000 4.25 BB/Ba3 VeriFone Systems, Inc., Term B Loan, 11/14/18 601,149 ------------ $ 4,522,634 ----------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 33 Schedule of Investments | 4/30/12 (unaudited) (continued) -------------------------------------------------------------------------------------------------------- Principal Floating S&P/Moody's Amount ($) Rate (b) Ratings Value -------------------------------------------------------------------------------------------------------- Application Software -- 3.5% 1,896,277 6.50 BB-/Ba2 Allen Systems Group, Inc., Term B Loan, 11/22/15 $ 1,867,832 2,060,000 9.00 B/Ba3 Expert Global Solutions, Inc., Term B Advance (First Lien), 3/13/18 2,041,975 1,000,000 6.25 B+/Ba3 Lawson Software, Inc., Tranche B Term Loan, 3/16/18 1,014,375 1,079,100 4.00 BB-/Ba2 NDS Group, Ltd., Tranche B Loan, 2/14/18 1,080,449 372,642 4.47 B+/B1 Serena Software, Inc., 2016 Term Loan (Extended), 3/10/16 370,778 1,736,875 4.50 B+/B1 Verint Systems, Inc., Term Loan 2011, 10/6/17 1,737,961 1,703,693 5.25 B+/B1 Vertafore, Inc., Term Loan (First Lien), 7/31/16 1,711,680 475,000 5.50 B/Ba3 Wall Street Systems, Term Loan (First Lien), 5/4/17 472,625 ------------ $ 10,297,675 -------------------------------------------------------------------------------------------------------- Systems Software -- 0.7% 1,310,000 4.00 NR/Ba2 Rovi Corp., Tranche B2 Term Loan, 3/30/19 $ 1,312,424 699,600 3.75 BBB-/Ba2 The Reynolds & Reynolds Co., Tranche B Term Loan, 3/9/18 700,474 ------------ $ 2,012,898 ------------ Total Software & Services $ 16,833,207 -------------------------------------------------------------------------------------------------------- TECHNOLOGY HARDWARE & EQUIPMENT -- 2.3% Communications Equipment -- 0.8% 1,975,013 4.25 NR/NR CommScope, Inc., Tranche 1 Term Loan, 1/14/18 $ 1,981,161 262,350 4.50 NR/NR TowerCo Finance LLC, New Term Loan, 2/2/17 263,662 ------------ $ 2,244,823 -------------------------------------------------------------------------------------------------------- Electronic Equipment Manufacturers -- 0.7% 1,980,000 4.75 B+/Ba3 Sensus USA, Inc., Term Loan (First Lien), 4/13/17 $ 1,984,124 -------------------------------------------------------------------------------------------------------- Electronic Components -- 0.6% 493,750 5.00 B+/Ba2 CPI International, Inc., Term B Loan, 11/24/17 $ 493,750 1,429,089 5.00 B/B2 Scitor Corp., Term Loan, 1/21/17 1,398,721 ------------ $ 1,892,471 -------------------------------------------------------------------------------------------------------- Technology Distributors -- 0.2% 664,875 4.75 BB-/B1 Excelitas Technologies Corp., New Term B Loan, 11/29/16 $ 658,226 ------------ Total Technology Hardware & Equipment $ 6,779,644 -------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 34 Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 ---------------------------------------------------------------------------------------------------- Principal Floating S&P/Moody's Amount ($) Rate (b) Ratings Value ---------------------------------------------------------------------------------------------------- SEMICONDUCTORS & SEMICONDUCTOR EQUIPMENT -- 2.2% Semiconductor Equipment -- 1.6% 1,176,948 4.25 BB-/B1 Aeroflex, Inc., Tranche B Term Loan, 4/25/18 $ 1,174,742 2,356,459 4.49 B/B1 Freescale Semiconductor, Inc., Tranche B-1 Term Loan, 12/1/16 2,315,914 1,389,500 4.00 BB+/Ba3 Sensata Technologies BV, Term Loan, 4/29/18 1,392,597 ------------ $ 4,883,253 ---------------------------------------------------------------------------------------------------- Semiconductors -- 0.6% 1,583,096 4.00 BB/Ba2 Microsemi Corp., Term Loan, 2/2/18 $ 1,588,044 175,000 4.25 NR/Ba2 Semtech Corp., B Term Loan, 2/21/17 175,438 ------------ $ 1,763,482 ------------ Total Semiconductors & Semiconductor Equipment $ 6,646,735 ---------------------------------------------------------------------------------------------------- TELECOMMUNICATION SERVICES -- 2.5% Integrated Telecommunication Services -- 0.7% 1,260,152 4.60 BB-/Ba3 West Corp., Term B-4 Loan, 7/15/16 $ 1,267,241 353,953 4.49 BB-/Ba3 West Corp., Term B-5 Loan, 7/15/16 356,110 290,273 3.16 BB+/Baa3 Windstream Corp., Tranche B-2 Term Loan, 12/17/15 290,926 ------------ $ 1,914,277 ---------------------------------------------------------------------------------------------------- Wireless Telecommunication Services -- 1.8% 1,860,938 4.50 NR/NR Cellular South, Inc., Term Loan, 6/16/17 $ 1,860,938 990,000 5.25 BB-/B1 Intelsat Jackson Holdings SA, Tranche B Term Loan, 4/3/18 996,600 1,252,615 4.07 BB/Ba1 MetroPCS, Inc., Tranche B-2 Term Loan, 11/3/16 1,249,483 296,997 4.00 BB/Ba1 MetroPCS, Inc., Tranche B-3 Term Loan, 3/17/18 294,770 1,025,000 0.00 BB-/B1 Syniverse Holdings, Inc., 4/10/19 1,028,844 ------------ $ 5,430,635 ------------ Total Telecommunication Services $ 7,344,912 ---------------------------------------------------------------------------------------------------- UTILITIES -- 2.2% Electric Utilities -- 1.1% 1,421,392 5.75 BB-/Ba3 EquiPower Resources Corp., Term B Facility, 1/4/18 $ 1,339,662 660,055 7.75 BB/Ba2 Race Point Power, Loan, 1/11/18 659,230 2,528,934 4.74 CCC/B2 Texas Competitive Electric Holdings Co LLC, 2017 Term Loan (Extending), 10/10/17 1,391,968 ------------ $ 3,390,860 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 35 Schedule of Investments | 4/30/12 (unaudited) (continued) ------------------------------------------------------------------------------------------------------------ Principal Floating S&P/Moody's Amount ($) Rate (b) Ratings Value ------------------------------------------------------------------------------------------------------------ Independent Power Producers & Energy Traders -- 1.1% 1,435,500 4.50 BB-/B1 Calpine Corp., Term Loan, 3/1/18 $ 1,438,965 1,668,150 4.25 BB+/Ba1 The AES Corp., Initial Term Loan, 5/17/18 1,675,622 ------------ $ 3,114,587 ------------ Total Utilities $ 6,505,447 ------------------------------------------------------------------------------------------------------------ TOTAL SENIOR FLOATING RATE LOAN INTERESTS (Cost $278,957,891) $277,578,744 ------------------------------------------------------------------------------------------------------------ TEMPORARY CASH INVESTMENTS -- 1.0% Repurchase Agreement -- 1.0% 2,870,000 NR/Aaa JPMorgan, Inc., 0.20%, dated 4/30/12, repurchase price of $2,869,996 plus accrued interest on 5/1/12 collateralized by $2,927,398 Federal National Mortgage Association (ARM), 2.191 - 5.904%, 11/1/35 - 8/1/45 $ 2,870,000 ------------------------------------------------------------------------------------------------------------ TOTAL TEMPORARY CASH INVESTMENTS (Cost $2,870,000) $ 2,870,000 ------------------------------------------------------------------------------------------------------------ TOTAL INVESTMENT IN SECURITIES -- 100.2% (Cost $299,180,964) (a) $298,145,289 ------------------------------------------------------------------------------------------------------------ OTHER ASSETS & LIABILITIES -- (0.2)% $ (550,549) ------------------------------------------------------------------------------------------------------------ TOTAL NET ASSETS -- 100.0% $297,594,740 ============================================================================================================ * Non-income producing security. NR Not rated by either S&P or Moody's. WR Withdrawn rating. (Perpetual) Security with no stated maturity date. (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 April 30, 2012, the value of these securities amounted to $7,203,453 or 2.4% of total net assets. ** Senior floating rate loan interests in which the Fund invests generally pay interest at rates that are periodically redetermined by reference to a base lending rate plus a premium. These base lending rates are generally (i) the lending rate offered by one or more major European banks, such as LIBOR (London InterBank Offered Rate), (ii) the prime rate offered by one or more major United States banks, (iii) the certificate of deposit or (iv) other base lending rates used by commercial lenders. The rate shown is the coupon rate at period end. The accompanying notes are an integral part of these financial statements. 36 Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 (a) At April 30, 2012, the net unrealized loss on investments based on cost for federal income tax purposes of $299,265,516 was as follows: Aggregate gross unrealized gain for all investments in which there is an excess of value over tax cost $ 2,720,379 Aggregate gross unrealized loss for all investments in which there is an excess of tax cost over value (3,840,606) ----------- Net unrealized loss $(1,120,227) =========== (b) Debt obligation with a variable interest rate. Rate shown is rate at end of period. Purchases and sales of securities (excluding temporary cash investments) for the six months ended April 30, 2012 aggregated $67,060,018 and $66,827,954, respectively. Principal amounts are denominated in U.S. Dollars unless otherwise noted: EURO Euro NOK Norwegian Krone 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.) Level 3 -- significant unobservable inputs (including the Fund's own assumptions in determining fair value of investments) Generally, equity securities are categorized as Level 1, fixed income securities and senior loans as Level 2 and securities valued using fair value methods are categorized as Level 3. See Notes to Financial Statements -- Note 1A. The following is a summary of the inputs used as of April 30, 2012, in valuing the Fund's assets: --------------------------------------------------------------------------------------------- Level 1 Level 2 Level 3 Total --------------------------------------------------------------------------------------------- Convertible Corporate Bonds $ -- $ 978,750 $ -- $ 978,750 Convertible Preferred Stocks 120,000 -- -- 120,000 Common Stock 166 138,129 -- 138,295 Asset Backed Securities -- 2,485,218 -- 2,485,218 Collateralized Mortgage Obligations -- 2,146,453 -- 2,146,453 Corporate Bonds -- 11,827,829 -- 11,827,829 Senior Floating Rate Loan Interests -- 277,578,748 -- 277,578,748 Repurchase agreements -- 2,869,996 -- 2,869,996 --------------------------------------------------------------------------------------------- Total $120,166 $298,025,123 $ -- $298,145,289 ============================================================================================= Other Financial Instruments* $ -- $ (31,344) $ -- $ (31,344) ============================================================================================= * Other financial instruments include foreign exchange contracts. The accompanying notes are an integral part of these financial statements. Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 37 Schedule of Investments | 4/30/12 (unaudited) (continued) Following is a reconciliation of assets using significant unobservable inputs (Level 3): --------------------------------------------------------------- Common Stocks --------------------------------------------------------------- Balance as of 10/31/11 $108,223 Realized gain (loss)(1) 53,795 Change in unrealized appreciation (depreciation)(2) (63,999) Net purchases (sales) (98,019) Transfers in and out of Level 3 -- --------------------------------------------------------------- Balance as of 4/30/12 $ -- =============================================================== 1 Realized gain (loss) on these securities is included in the net realized gain (loss) from investments in the Statement of Operations. 2 Change in unrealized appreciation (depreciation) on these securities is included in the change in unrealized gain (loss) on investments in the Statement of Operations. The accompanying notes are an integral part of these financial statements. 38 Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 Statement of Assets and Liabilities | 4/30/12 (unaudited) ASSETS: Investment in securities (cost $299,180,964) $298,145,289 Cash 1,283,712 Foreign currencies, at value (cost $25,331) 25,602 Receivables -- Investment securities sold 3,975,029 Fund shares sold 1,759,282 Dividends and interest 1,507,782 Due from Pioneer Investment Management, Inc. 26,077 Other 70,474 -------------------------------------------------------------------------------------- Total assets $306,793,247 -------------------------------------------------------------------------------------- LIABILITIES: Payables -- Investment securities purchased $ 7,446,603 Fund shares repurchased 1,350,956 Dividends 178,037 Forward foreign currency portfolio hedge contracts, open-net 31,344 Due to affiliates 92,662 Unrealized depreciation on unfunded corporate loans 13,366 Accrued expenses 85,539 -------------------------------------------------------------------------------------- Total liabilities $ 9,198,507 -------------------------------------------------------------------------------------- NET ASSETS: Paid-in capital $300,330,753 Undistributed net investment income 327,358 Accumulated net realized loss on investments and foreign currency transactions (1,983,138) Net unrealized loss on investments (1,049,041) Net unrealized loss on forward foreign currency contracts and other assets and liabilities denominated in foreign currencies (31,192) -------------------------------------------------------------------------------------- Total net assets $297,594,740 ====================================================================================== NET ASSET VALUE PER SHARE: (No par value, unlimited number of shares authorized) Class A (based on $166,246,251/24,143,157 shares) $ 6.89 Class C (based on $64,748,101/9,397,420 shares) $ 6.89 Class Y (based on $65,898,148/9,550,968 shares) $ 6.90 Class Z (based on $702,240/101,643 shares) $ 6.91 MAXIMUM OFFERING PRICE: Class A ($6.89 [divided by] 95.5%) $ 7.21 ====================================================================================== The accompanying notes are an integral part of these financial statements. Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 39 Statement of Operations (unaudited) For the Six Months Ended 4/30/12 INVESTMENT INCOME: Dividends $ 2,376 Interest 8,653,692 ------------------------------------------------------------------------------------------------------- Total investment income $ 8,656,068 ------------------------------------------------------------------------------------------------------- EXPENSES: Management fees $ 886,141 Transfer agent fees Class A 30,902 Class C 12,119 Class Y 5,818 Class Z 52 Distribution fees Class A 213,680 Class C 319,125 Shareholder communications expense 99,658 Administrative reimbursement 42,419 Custodian fees 13,440 Registration fees 47,389 Professional fees 38,590 Printing expense 17,961 Fees and expenses of nonaffiliated Trustees 4,289 Miscellaneous 5,349 ------------------------------------------------------------------------------------------------------- Total expenses $ 1,736,932 Less fees waived and expenses reimbursed by Pioneer Investment Management, Inc. (47,479) ------------------------------------------------------------------------------------------------------- Net expenses $ 1,689,453 ------------------------------------------------------------------------------------------------------- Net investment income $ 6,966,615 ------------------------------------------------------------------------------------------------------- REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS AND FOREIGN CURRENCY TRANSACTIONS: Net realized gain (loss) on: Investments $ (184,105) Forward foreign currency contracts and other assets and liabilities denominated in foreign currencies 92,704 $ (91,401) ------------------------------------------------------------------------------------------------------- Change in net unrealized gain (loss) on: Investments $4,831,830 Unfunded corporate loans (13,366) Forward foreign currency contracts and other assets and liabilities denominated in foreign currencies (7,475) $ 4,810,989 ------------------------------------------------------------------------------------------------------- Net gain on investments and foreign currency transactions $ 4,784,505 ------------------------------------------------------------------------------------------------------- Net increase in net assets resulting from operations $11,686,203 ======================================================================================================= The accompanying notes are an integral part of these financial statements. 40 Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 Statement of Changes in Net Assets ------------------------------------------------------------------------------------------------- Six Months Ended 4/30/12 Year Ended (unaudited) 10/31/11 ------------------------------------------------------------------------------------------------- FROM OPERATIONS: Net investment income $ 6,966,615 $ 12,548,053 Net realized loss on investments and foreign currency transactions (184,105) (582,274) Change in net unrealized gain (loss) on investments and foreign currency transactions 4,810,989 (7,776,011) ------------------------------------------------------------------------------------------------- Net increase in net assets resulting from operations $ 11,686,203 $ 4,189,768 ------------------------------------------------------------------------------------------------- DISTRIBUTIONS TO SHAREOWNERS: Net investment income: Class A ($0.16 and $0.30 per share, respectively) $ (4,025,604) $ (7,538,271) Class C ($0.13 and $0.25 per share, respectively) (1,257,255) (2,120,981) Class Y ($0.17 and $0.32 per share, respectively) (1,498,681) (2,673,529) Class Z ($0.17 and $0.05 per share, respectively) (5,185) (79) ------------------------------------------------------------------------------------------------- Total distributions to shareowners $ (6,786,725) $(12,332,860) ------------------------------------------------------------------------------------------------- FROM FUND SHARE TRANSACTIONS: Net proceeds from sale of shares $ 81,014,616 $347,829,437 Reinvestment of distributions 5,699,891 10,059,808 Cost of shares repurchased (96,564,004) (181,682,961) ------------------------------------------------------------------------------------------------- Net increase (decrease) in net assets resulting from Fund share transactions $ (9,849,497) $176,206,284 ------------------------------------------------------------------------------------------------- Net increase (decrease) in net assets $ (4,950,019) $168,063,192 NET ASSETS: Beginning of period 302,544,759 134,481,567 ------------------------------------------------------------------------------------------------- End of period $297,594,740 $302,544,759 ------------------------------------------------------------------------------------------------- Undistributed net investment income $ 327,358 $ 147,468 ------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 41 Statement of Changes in Net Assets (continued) ------------------------------------------------------------------------------------------------------ '12 Shares '12 Amount '11 Shares '11 Amount (unaudited) (unaudited) ------------------------------------------------------------------------------------------------------ Class A Shares sold 6,763,599 $ 46,031,980 27,533,982 $190,031,675 Reinvestment of distributions 532,963 3,630,142 949,984 6,514,391 Less shares repurchased (9,244,131) (62,923,424) (15,946,532) (108,422,821) ------------------------------------------------------------------------------------------------------ Net increase (decrease) (1,947,569) $(13,261,302) 12,537,434 $ 88,123,245 ====================================================================================================== Class C Shares sold 1,294,779 $ 8,844,274 9,140,903 $ 63,270,142 Reinvestment of distributions 156,443 1,066,596 259,218 1,779,066 Less shares repurchased (1,680,628) (11,454,671) (3,220,120) (21,822,362) ------------------------------------------------------------------------------------------------------ Net increase (decrease) (229,406) $ (1,543,801) 6,180,001 $ 43,226,846 ====================================================================================================== Class Y Shares sold 3,728,686 $ 25,445,514 13,651,680 $ 94,517,620 Reinvestment of distributions 146,206 998,171 256,726 1,766,351 Less shares repurchased (3,257,454) (22,175,563) (7,536,617) (51,437,778) ------------------------------------------------------------------------------------------------------ Net increase 617,438 $ 4,268,122 6,371,789 $ 44,846,193 ====================================================================================================== Class Z* Shares sold 100,953 $ 692,848 1,468 $ 10,000 Reinvestment of distributions 724 4,982 -- -- Less shares repurchased (1,502) (10,346) -- -- ------------------------------------------------------------------------------------------------------ Net increase 100,175 $ 692,848 1,468 $ 10,000 ====================================================================================================== * Class Z shares were first publicly offered on August 8, 2011. The accompanying notes are an integral part of these financial statements. 42 Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 Financial Highlights -------------------------------------------------------------------------------------------------------------------- Six Months Ended 4/30/12 Year Ended Year Ended (unaudited) 10/31/11 10/31/10 -------------------------------------------------------------------------------------------------------------------- Class A Net asset value, beginning of period $ 6.77 $ 6.87 $ 6.58 -------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income $ 0.16 $ 0.31 $ 0.31 Net realized and unrealized gain (loss) on investments 0.12 (0.11) 0.30 -------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net assets from investment operations $ 0.28 $ 0.20 $ 0.61 Distributions to shareowners: Net investment income (0.16) (0.30) (0.32) -------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 6.89 $ 6.77 $ 6.87 ==================================================================================================================== Total return* 4.18% 2.98% 9.44% Ratio of net expenses to average net assets+ 1.06%** 1.10% 1.10% Ratio of net investment income to average net assets+ 4.80%** 4.47% 4.48% Portfolio turnover rate 46%** 57% 37% Net assets, end of period (in thousands) $166,246 $176,701 $93,183 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Net expenses 1.06%** 1.12% 1.29% Net investment income 4.80%** 4.45% 4.30% Ratios with waiver of fees and assumption of expenses by the Adviser and reduction for fees paid indirectly: Net expenses 1.06%** 1.10% 1.10% Net investment income 4.80%** 4.47% 4.48% ==================================================================================================================== ----------------------------------------------------------------------------------------------------------------- Year Ended Year Ended 2/14/07 (a) 10/31/09 10/31/08 to 10/31/07 ----------------------------------------------------------------------------------------------------------------- Class A Net asset value, beginning of period $ 5.64 $ 7.29 $ 7.50 ----------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income $ 0.32 $ 0.40 $ 0.32 Net realized and unrealized gain (loss) on investments 0.95 (1.62) (0.23) ----------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net assets from investment operations $ 1.27 $ (1.22) $ 0.09 Distributions to shareowners: Net investment income (0.33) (0.43) (0.30) ----------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 6.58 $ 5.64 $ 7.29 ================================================================================================================= Total return* 23.50% (17.57)% 1.21%(b) Ratio of net expenses to average net assets+ 1.10% 1.10% 1.10%** Ratio of net investment income to average net assets+ 5.26% 5.85% 6.31%** Portfolio turnover rate 23% 30% 49%(b) Net assets, end of period (in thousands) $27,333 $ 9,130 $11,216 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Net expenses 1.58% 1.40% 1.47%** Net investment income 4.78% 5.55% 5.94%** Ratios with waiver of fees and assumption of expenses by the Adviser and reduction for fees paid indirectly: Net expenses 1.10% 1.10% 1.10%** Net investment income 5.26% 5.85% 6.31%** ================================================================================================================= (a) Class A shares were first publicly offered on February 14, 2007. * 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. (b) Not annualized. + Ratios with no reduction for fees paid indirectly. The accompanying notes are an integral part of these financial statements. Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 43 Financial Highlights (continued) ---------------------------------------------------------------------------------------------------------------- Six Months Ended 4/30/12 Year Ended Year Ended (unaudited) 10/31/11 10/31/10 ---------------------------------------------------------------------------------------------------------------- Class C Net asset value, beginning of period $ 6.78 $ 6.87 $ 6.58 ---------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income $ 0.14 $ 0.26 $ 0.25 Net realized and unrealized gain (loss) on investments 0.10 (0.10) 0.30 ---------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net assets from investment operations $ 0.24 $ 0.16 $ 0.55 Distributions to shareowners: Net investment income (0.13) (0.25) (0.26) ---------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 6.89 $ 6.78 $ 6.87 ================================================================================================================ Total return* 3.63% 2.33% 8.47% Ratio of net expenses to average net assets+ 1.83%** 1.89% 2.00% Ratio of net investment income to average net assets+ 4.04%** 3.68% 3.59% Portfolio turnover rate 46%** 57% 37% Net assets, end of period (in thousands) $64,748 $65,238 $23,703 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Net expenses 1.83%** 1.89% 2.04% Net investment income 4.04%** 3.68% 3.55% Ratios with waiver of fees and assumption of expenses by the Adviser and reduction for fees paid indirectly: Net expenses 1.83%** 1.89% 2.00% Net investment income 4.04%** 3.68% 3.59% ================================================================================================================ ----------------------------------------------------------------------------------------------------------------- Year Ended Year Ended 2/14/07 (a) 10/31/09 10/31/08 to 10/31/07 ----------------------------------------------------------------------------------------------------------------- Class C Net asset value, beginning of period $ 5.63 $ 7.29 $ 7.50 ----------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income $ 0.27 $ 0.34 $ 0.28 Net realized and unrealized gain (loss) on investments 0.96 (1.63) (0.23) ----------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net assets from investment operations $ 1.23 $ (1.29) $ 0.05 Distributions to shareowners: Net investment income (0.28) (0.37) (0.26) ----------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 6.58 $ 5.63 $ 7.29 ================================================================================================================= Total return* 22.63% (18.46)% 0.70%(b) Ratio of net expenses to average net assets+ 2.00% 2.00% 2.00%** Ratio of net investment income to average net assets+ 4.60% 4.96% 5.38%** Portfolio turnover rate 23% 30% 49%(b) Net assets, end of period (in thousands) $13,219 $ 9,040 $10,959 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Net expenses 2.29% 2.30% 2.32%** Net investment income 4.31% 4.66% 5.06%** Ratios with waiver of fees and assumption of expenses by the Adviser and reduction for fees paid indirectly: Net expenses 2.00% 2.00% 2.00%** Net investment income 4.60% 4.96% 5.38%** ================================================================================================================= (a) Class C shares were first publicly offered on February 14, 2007. * 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. (b) Not annualized. + Ratios with no reduction for fees paid indirectly. The accompanying notes are an integral part of these financial statements. 44 Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 ---------------------------------------------------------------------------------------------------------------- Six Months Ended 4/30/12 Year Ended Year Ended (unaudited) 10/31/11 10/31/10 ---------------------------------------------------------------------------------------------------------------- Class Y Net asset value, beginning of period $ 6.78 $ 6.89 $ 6.59 ---------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income $ 0.17 $ 0.33 $ 0.32 Net realized and unrealized gain (loss) on investments 0.12 (0.12) 0.31 ---------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net assets from investment operations $ 0.29 $ 0.21 $ 0.63 Distributions to shareowners: Net investment income (0.17) (0.32) (0.33) ---------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 6.90 $ 6.78 $ 6.89 ================================================================================================================ Total return* 4.32% 3.11% 9.71% Ratio of net expenses to average net assets+ 0.67%** 0.88% 0.92% Ratio of net investment income to average net assets+ 5.20%** 4.70% 4.67% Portfolio turnover rate 46%** 57% 37% Net assets, end of period (in thousands) $65,898 $60,596 $17,659 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Net expenses 0.83%** 0.88% 0.95% Net investment income 5.05%** 4.70% 4.67% Ratios with waiver of fees and assumption of expenses by the Adviser and reduction for fees paid indirectly: Net expenses 0.67%** 0.88% 0.92% Net investment income 5.20%** 4.70% 4.67% ================================================================================================================ ----------------------------------------------------------------------------------------------------------------- Year Ended Year Ended 2/14/07 (a) 10/31/09 10/31/08 to 10/31/07 ----------------------------------------------------------------------------------------------------------------- Class Y Net asset value, beginning of period $ 5.64 $ 7.29 $ 7.50 ----------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income $ 0.32 $ 0.40 $ 0.33 Net realized and unrealized gain (loss) on investments 0.96 (1.62) (0.24) ----------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net assets from investment operations $ 1.28 $ (1.22) $ 0.09 Distributions to shareowners: Net investment income (0.33) (0.43) (0.30) ----------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 6.59 $ 5.64 $ 7.29 ================================================================================================================= Total return* 23.70% (17.53)% 1.24%(b) Ratio of net expenses to average net assets+ 1.09% 1.08% 1.11%** Ratio of net investment income to average net assets+ 5.58% 5.82% 6.27%** Portfolio turnover rate 23% 30% 49%(b) Net assets, end of period (in thousands) $12,109 $10,491 $9,730 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Net expenses 1.24% 1.27% 1.32%** Net investment income 5.43% 5.63% 6.06%** Ratios with waiver of fees and assumption of expenses by the Adviser and reduction for fees paid indirectly: Net expenses 1.09% 1.08% 1.11%** Net investment income 5.58% 5.82% 6.27%** ================================================================================================================= (a) Class Y shares were first publicly offered on February 14, 2007. * 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. (b) Not annualized. + Ratios with no reduction for fees paid indirectly. The accompanying notes are an integral part of these financial statements. Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 45 Financial Highlights (continued) ---------------------------------------------------------------------------------------------------- Six Months Ended 4/30/12 8/8/11 (a) to (unaudited) 10/31/11 ---------------------------------------------------------------------------------------------------- Class Z Net asset value, beginning of period $ 6.80 $ 6.81 ---------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income $ 0.17 $ 0.07 Net realized and unrealized loss on investments 0.11 (0.03) ---------------------------------------------------------------------------------------------------- Net increase in net assets from investment operations $ 0.28 $ 0.04 Distributions to shareowners: Net investment income (0.17) (0.05) ---------------------------------------------------------------------------------------------------- Net asset value, end of period $ 6.91 $ 6.80 ==================================================================================================== Total return* 4.13% 2.40%(b) Ratio of net expenses to average net assets+ 0.83%** 0.90%** Ratio of net investment income to average net assets+ 4.93%** 4.86%** Portfolio turnover rate 46%** 57%(b) Net assets, end of period (in thousands) $ 702 $ 10 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Net expenses 0.83%** 1.22%** Net investment income 4.93%** 4.54%** Ratios with waiver of fees and assumption of expenses by the Adviser and reduction for fees paid indirectly: Net expenses 0.83%** 0.90%** Net investment income 4.93%** 4.86%** ==================================================================================================== (a) Class Z shares were first publicly offered on August 8, 2011. * 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. (b) Not annualized. + Ratios with no reduction for fees paid indirectly. The accompanying notes are an integral part of these financial statements. 46 Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 Notes to Financial Statements | 4/30/12 (unaudited) 1. Organization and Significant Accounting Policies Pioneer Floating Rate Fund (the Fund) is a series of Pioneer Series Trust VI, a Delaware statutory trust. The Fund is registered under the Investment Company Act of 1940 as a diversified, open-end management investment company. The investment objective of the Fund is to produce a high level of current income. The Fund offers four classes of shares designated as Class A, Class C, Class Y and Class Z shares. Class A, Class C and Class Y shares were first publicly offered on February 14, 2007 and Class Z shares were first publicly offered on August 8, 2011. 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 or Class Z 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. Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 47 The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements, which are consistent with those policies generally accepted in the investment company industry: A. Security Valuation Security transactions are recorded as of trade date. 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. Senior floating rate loan interests (senior loans) are valued in accordance with guidelines established by the Board of Trustees at the mean between the last available bid and asked prices from one or more brokers or dealers as obtained from Loan Pricing Corporation, an independent pricing service. Senior loans for which no reliable price quotes are available will be valued by Loan Pricing Corporation through the use of pricing matrices to determine valuations. Fixed-income securities with remaining maturity of more than sixty days are valued at 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. Valuations may be supplemented by values obtained from dealers, brokers and other sources, as required. Equity securities that have traded on an exchange are valued at 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. Short-term fixed income securities with remaining maturities of sixty days or less generally are valued at amortized cost. Trading in foreign 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. Securities or senior loans 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 using fair value methods pursuant to procedures adopted by the Board of Trustees. 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 from exchange prices. At April 30, 2012, there were no securities that were valued using fair value methods (other than securities valued using prices supplied by independent pricing services). Inputs used when applying fair value methods to value a 48 Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 security may include credit ratings, the financial condition of the company, current market conditions and comparable securities. 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 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, including interest on income bearing cash accounts, is recorded on the accrual basis. Dividend and interest income are reported net of unrecoverable foreign taxes withheld at the applicable country rates. Gains and losses on sales of investments are calculated on the identified cost method for both financial reporting and federal income tax purposes. B. 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 federal income tax provision is required. Tax years for the prior three fiscal years are subject to examination by federal and state tax authorities. The amounts and characterizations of distributions to shareowners for financial reporting purposes are determined in accordance with federal income tax rules. Therefore, the sources of the Fund's distributions may be shown in the accompanying financial statements as from or in excess of net investment income or as from net realized gain on investment transactions, or as from paid-in capital, depending on the type of book/tax differences that may exist. The tax character of current year distributions payable will be determined at the end of the Fund's taxable year. The tax character of distributions paid during the year ended October 31, 2011 was as follows: -------------------------------------------------------------------------------- 2011 -------------------------------------------------------------------------------- Distributions paid from: Ordinary income $12,332,860 -------------------------------------------------------------------------------- Total $12,332,860 ================================================================================ Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 49 The following shows the components of distributable earnings on a federal income tax basis at October 31, 2011: -------------------------------------------------------------------------------- 2011 -------------------------------------------------------------------------------- Distributable earnings: Undistributed ordinary income $ 384,255 Capital loss carryforward (1,891,734) Dividend payable (176,962) Net unrealized loss (5,951,050) -------------------------------------------------------------------------------- Total $(7,635,491) ================================================================================ The difference between book-basis and tax-basis net unrealized loss is attributable to the tax deferral of losses on wash sales, the tax treatment of premium and amortization, the mark-to-market of forward currency and futures contracts, interest on defaulted bonds and interest accruals on preferred stock. C. 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 gains or losses are recorded in the Fund's financial statements. The Fund records realized gains and losses at the time a portfolio hedge 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 6). 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 $55,174 in underwriting commissions on the sale of Class A shares during the six months ended April 30, 2012. 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 and Class Z shares do not pay distribution fees. All expenses 50 Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 and fees paid to the transfer agent, Pioneer Investment Management Shareholder Services, Inc. (PIMSS), 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, Class Y and Class Z shares can reflect different transfer agent and distribution expense rates. F. Risks 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 invests in below investment grade (high yield) debt securities. Debt securities rated below investment grade are commonly referred to as "junk bonds" and are considered speculative. These securities involve greater risk of loss, are subject to greater price volatility, and are less liquid, especially during periods of economic uncertainty or change, than higher rated debt securities. The Fund's investments in foreign markets or countries with limited developing markets may also subject the Fund to a greater degree of risk than investments in a developed market. Risks associated with these markets include disruptive political or economic conditions and the possible imposition of adverse governmental laws or currency exchange restrictions. 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. G. Repurchase Agreements With respect to repurchase agreements entered into by the Fund, the value of the underlying securities (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, Pioneer Investment Management, Inc. (PIM), is responsible for determining that the value of the collateral remains at least equal to the repurchase price. Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 51 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 of 0.60% of the Fund's average daily net assets up to $500 million and 0.55% on assets over $500 million. For the six months ended April 30, 2012, the effective management fee (excluding waivers and/or assumption of expenses) was equivalent to 0.60% of the Fund's average daily net assets. PIM has contractually agreed to limit ordinary operating expenses to the extent required to reduce Fund expenses to 0.70% and 0.90% of the Fund's average daily net assets attributable to Class Y and Class Z shares, respectively. Fees waived and expenses reimbursed during the period ended April 30, 2012, are reflected on the Statement of Operations. These expense limitations are in effect through March 1, 2013. There can be no assurance that PIM will extend the expense limitation agreement for a class of shares beyond the dates 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 $28,236 in management fees, administrative costs and certain other reimbursements payable to PIM at April 30, 2012. 3. Transfer Agent PIMSS, a wholly owned indirect subsidiary of UniCredit, provides substantially all transfer agent and shareowner services to the Fund at negotiated rates. In addition, the Fund reimburses PIMSS for out-of-pocket expenses incurred by PIMSS related to shareholder communications activities such as proxy and statement mailings, outgoing phone calls and omnibus relationship contracts. For the six months ended April 30, 2012, such out-of-pocket expenses by class of shares were as follows: -------------------------------------------------------------------------------- Shareholder Communications: -------------------------------------------------------------------------------- Class A $50,324 Class C 22,861 Class Y 26,465 Class Z 9 -------------------------------------------------------------------------------- Total $99,659 ================================================================================ Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $52,867 in transfer agent fees and out-of-pocket reimbursements payable to PIMSS at April 30, 2012. 52 Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 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 $11,559 in distribution fees payable to PFD at April 30, 2012. In addition, redemptions of each class of shares (except Class Y and Z 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 one year of purchase are subject to a CDSC of 1.00%, based on the lower of cost or market value of shares being redeemed. Shares purchases 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 or Z shares. Proceeds from the CDSCs are paid to PFD. For the six months ended April 30, 2012, CDSCs in the amount of $34,204 were paid to PFD. 5. Expense Offset Arrangements The Fund has entered into certain expense offset arrangements with PIMSS which may result in a reduction in the Fund's total expenses due to interest earned on cash held by PIMSS. For the six months ended April 30, 2012, the Fund's expenses were not reduced under such arrangements. 6. Forward Foreign Currency Contracts At April 30, 2012, 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 contracts open during the six months ended April 30, 2012 was $3,400,000. At April 30, 2012, the Fund had no outstanding settlement contracts. Open portfolio hedges at April 30, 2012 were as follows: Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 53 --------------------------------------------------------------------------------------------- Net Net Contracts to In Exchange Settlement Unrealized Currency deliver For USD Date Value Gain (Loss) --------------------------------------------------------------------------------------------- EUR (Euro) (1,460,000) $(1,902,885) 12/15/11 $(1,932,912) $(30,027) NOK (Norwegian Krone) (1,470,000) (254,742) 12/15/11 (256,059) (1,317) --------------------------------------------------------------------------------------------- Total $(31,344) ============================================================================================= 7. 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 January 20, 2012 was in the amount of $165 million. Under such facility, interest on borrowings was payable at the higher of the London Interbank Offered Rate (LIBOR) on the borrowing date plus 1.25% on an annualized basis or the Federal Funds Rate on the borrowing date plus 1.25% on an annualized basis. The credit facility in effect as of February 15, 2012 is in the amount of $215 million. Under such facility, depending on the type of loan, interest on borrowings is payable at LIBOR plus 0.90% 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 Euro dollar 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 April 30, 2012, the Fund had no borrowings under a credit facility. 8. Unfunded Loan Commitments As of April 30, 2012, the Fund had unfunded loan commitments of approximately $297,030 (excluding unrealized depreciation on those commitments of $13,366 as of April 30, 2012), which could be extended at the option of the borrower pursuant to the following loan agreements: ------------------------------------------------------------------------------------------ Unrealized Borrower Shares Cost Value Loss ------------------------------------------------------------------------------------------ National Security Hospitals, Delayed Draw Term Loan 297,030 $297,030 $283,664 $(13,366) ========================================================================================== 54 Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 9. Additional Disclosures about Derivative Instruments and Hedging Activities Values of derivative instruments as of April 30, 2012 were as follows: -------------------------------------------------------------------------------------------- Derivatives Not Accounted for as Asset Derivatives 2012 Liabilities Derivatives 2012 Hedging Instruments ------------------------------------------------------------- Under Accounting Standards Codification Balance Sheet Balance Sheet (ASC) 815 Location Value Location Value -------------------------------------------------------------------------------------------- Foreign Exchange Contracts Receivables $ -- Payables $31,344 -------------------------------------------------------------------------------------------- Total $ -- $31,344 ============================================================================================ The effect of derivative instruments on the Statement of Operations for the six months ended April 30, 2012 was as follows: -------------------------------------------------------------------------------------------------------- Derivatives Not Change in Accounted for as Realized Unrealized Hedging Instruments Gain on Gain or (Loss) Under Accounting Location of Gain or (Loss) Derivatives on Derivatives Standards Codification on Derivatives Recognized Recognized Recognized (ASC) 815 in Income in Income in Income -------------------------------------------------------------------------------------------------------- Foreign Exchange Contracts Net realized gain on forward foreign $22,345 currency contracts and other assets and liabilities denominated in foreign currencies Foreign Exchange Contracts Change in unrealized gain (loss) on $(34,344) forward foreign currency contracts and other assets and liabilities denominated in foreign currencies Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 55 Approval of Investment Advisory Agreement Pioneer Investment Management, Inc. (PIM) serves as the investment adviser to Pioneer Floating Rate 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 March 2011 as the Trustees of the Fund agreed on, among other things, an overall approach and timeline for the process. In July 2011, the Trustees approved the format of the contract review materials and submitted their formal request to PIM to furnish information necessary to evaluate the terms of the investment advisory agreement. The contract review materials were provided to the Trustees in July 2011 and September 2011. After reviewing and discussing the materials, the Trustees submitted a request for additional information to PIM, and materials were provided in response to this request. Meetings of the Independent Trustees of the Fund were held in July, September, October, and November, 2011 to review and discuss the contract review materials. In addition, the Trustees took into account the information related to the Fund provided to the Trustees at each regularly scheduled meeting. At a meeting held on November 29, 2011, 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 considering 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. 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 reviewed the terms of the investment advisory agreement. The Trustees also reviewed PIM's investment approach for the Fund, its research process and its process for trade execution. The Trustees considered the resources of PIM and the personnel of PIM who provide investment management services to 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 also considered the substantial attention and high priority given by PIM's senior management to the Pioneer fund complex. In addition, the 56 Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 Trustees considered PIM's plans to increase resources in its investment management function and other enhancements to PIM's advisory capabilities. 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 The Trustees considered the performance results of the Fund over various time periods. They reviewed information comparing the Fund's performance with the performance of its peer group of funds as classified by Morningstar, Inc. (Morningstar), an independent provider of investment company data, and with the performance of the Fund's benchmark index. The Trustees considered that the Fund's annualized total return was in the fifth quintile of its Morningstar category for the one year period ended June 30, 2011 and in the second quintile of its Morningstar category for the three year period ended June 30, 2011. (In all quintile rankings referred to throughout this disclosure, first quintile is most favorable to the Fund's shareowners. Thus, highest relative performance would be first quintile and lowest relative expenses would also be first quintile.) The Trustees also considered that the Fund's twelve month average gross portfolio yield (using month end 30 day effective yields) exceeded the twelve month average yield of the Credit Suisse Leveraged Loan Index. The Trustees discussed the Fund's performance record and PIM's plan for improving the Fund's performance. The Trustees indicated that they were satisfied with the information presented with respect to the performance of the Fund. 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 Trust Research and Consulting, LLC (Strategic Insight), an independent third party. The Trustees considered that the Fund's management fee for the twelve months ended June 30, 2011 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 breakpoint in the management fee schedule Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 57 and the reduced fee rate on assets over $500 million. The Trustees considered that the Fund's expense ratio for the twelve months ended June 30, 2011 was in the third quintile relative to its Strategic Insight peer group for the comparable period. The Trustees reviewed gross and net management fees charged by PIM to its institutional and other clients, including publicly offered European funds, 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 to its other clients and considered the differences in management fees and profit margins for PIM's Fund and non-Fund services. In evaluating the fees associated with PIM'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 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. 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, rarely identifiable on a Fund-by-Fund basis, and that, among other factors that may 58 Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 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 Funds. 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 particularly, for example during the recent difficult periods for financial markets, as the level of services was maintained notwithstanding a significant decline in PIM's fee revenues from the Funds. Accordingly, the Trustees concluded that economies of scale, if any, were being appropriately shared with the Fund. 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. The Trustees considered the intangible benefits to PIM by virtue of its relationship with the Fund and the other Pioneer funds. The Trustees concluded that the receipt of these benefits was reasonable in the context of the overall relationship between PIM and the Fund. 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 Floating Rate Fund | Semiannual Report | 4/30/12 59 Trustees, Officers and Service Providers Trustees John F. Cogan, Jr., Chairman David R. Bock Mary K. Bush Benjamin M. Friedman Margaret B.W. Graham Daniel K. Kingsbury Thomas J. Perna Marguerite A. Piret Stephen K. West Officers John F. Cogan, Jr., President Daniel K. Kingsbury, Executive Vice President Mark E. Bradley, Treasurer Christopher J. Kelley, Secretary Investment Adviser and Administrator Pioneer Investment Management, Inc. Custodian Brown Brothers Harriman & Co. Principal Underwriter Pioneer Funds Distributor, Inc. Legal Counsel Bingham McCutchen LLP Shareowner Services and Transfer Agent Pioneer Investment Management Shareholder Services, Inc. Proxy Voting Policies and Procedures of the Trust are available without charge, upon request, by calling our toll free number (1-800-225-6292). Information regarding how the Trust 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. 60 Pioneer Floating Rate Fund | Semiannual Report | 4/30/12 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: -------------------------------------------------------------------------------- PIMSS, Inc. 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. Pioneer Multi-Asset Real Return Fund -------------------------------------------------------------------------------- Semiannual Report | April 30, 2012 -------------------------------------------------------------------------------- Ticker Symbols: Class A PMARX Class C PRRCX Class Y PMYRX [LOGO] PIONEER Investments(R) visit us: us.pioneerinvestments.com Table of Contents Letter to Shareowners 2 Portfolio Management Discussion 4 Portfolio Summary 9 Prices and Distributions 10 Performance Update 11 Comparing Ongoing Fund Expenses 14 Schedule of Investments 16 Financial Statements 30 Notes to Financial Statements 37 Approval of Investment Advisory Agreement 49 Trustees, Officers and Service Providers 53 Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 1 President's Letter Dear Shareowner, The U.S. economy continued its recovery through the first quarter of 2012, even as broader global concerns weighed on investors. The U.S. unemployment rate fell to 8.1% in April, and some indicators suggest that it may continue to trend down. The housing market continued to improve, fueled in part by record-low mortgage rates. The risk of rising oil prices appeared to recede. The improved outlook helped U.S. equity markets to perform well in the first quarter, with the Standard & Poor's 500 Index rising by 12%. For bond investors, the riskier sectors of the bond market fared the best. The broad bond market, as measured by the Barclays Capital Aggregate Bond Index, rose by just 0.3%, while the high-yield bond market, as measured by the Bank of America Merrill Lynch High Yield Master II Index, rose by 5.15%. We are cautiously optimistic that the U.S. economy will continue to improve. But we are also closely monitoring macroeconomic concerns that could change the market's direction, such as the lingering debt woes in Europe, the state of the Chinese economy, and the U.S. government's fiscal situation. Clouds have continued to hover over Europe, as the exit of Greece from the Euro-zone remains a possibility. Meanwhile, China continues to face a potential slowdown in economic growth. In the U.S., tax increases and spending cuts scheduled to take effect at year-end should, unless fiscal policy changes, sharply reduce the budget deficit -- which would be very good for the country in the longer run -- but also could potentially stall U.S. economic growth in 2013. All of these considerations may lead to further market volatility. At Pioneer, we have long advocated the benefits of staying diversified and investing for the long term. The strategy has generally performed well for many investors. Our advice, as always, is to work closely with a trusted financial advisor to discuss your goals and work together to develop an investment strategy that meets your individual needs. There is no single best strategy that works for every investor. Pioneer's investment professionals focus on finding good opportunities to invest in both equity and bond markets using the same disciplined investment approach we have used since 1928. Our strategy is to identify undervalued individual securities with the greatest potential for success, carefully weighing risk against reward. Our teams of investment professionals continually 2 Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 monitor and analyze the relative valuations of different sectors and securities globally to help build portfolios that we believe can help you achieve your investment goals. We invite you to learn more about Pioneer and our time-tested approach to investing by consulting with your financial advisor or visiting us online at us.pioneerinvestments.com. We greatly appreciate your trust in us, and we thank you for investing with Pioneer. Sincerely, /s/ Daniel K. Kingsbury Daniel K. Kingsbury President and CEO Pioneer Investment Management USA, Inc. Any information in this shareowner report regarding market or economic trends or the factors influencing the Trust'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 Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 3 Portfolio Management Discussion | 4/30/12 In the following discussion, Michele Garau reviews the factors that affected the performance of Pioneer Multi-Asset Real Return Fund during the six-month period ended April 30, 2012. Mr. Garau, vice president and portfolio manager at Pioneer, is responsible for the day-to-day management of the Fund. Q Could you review the Fund's overall investment approach? A The Fund seeks to generate real returns -- or, in other words, a return in excess of inflation -- across a full range of economic scenarios. While many real-return portfolios focus exclusively on hard assets (such as gold, commodities, oil, and real estate) and/or Treasury Inflation Protected Securities ("TIPS"), we believe that a diversified*, flexible approach that allocates between those real assets and traditional financial assets, such as stocks and bonds, may yield better long-term results. We believe the Fund's "go anywhere" investment philosophy provides us with a greater degree of latitude in our quest to achieve positive real returns over time, no matter what the level of inflation. Q How did the Fund perform during the six months ended April 30, 2012? A During the six months ended April 30, 2012, Pioneer Multi-Asset Real Return Fund Class A shares returned 5.74% at net asset value, while the Fund's benchmark, the Barclays Capital U.S. Treasury TIPS 1-10 Year Index (the Barclays Index), returned 2.93%. During the same six-month period, the average return of the 212 mutual funds in Lipper's Flexible Portfolio Funds category was 4.82%. Q How were the Fund's assets allocated as of the end of the period on April 30, 2012? A As of April 30, 2012, approximately 64% of the Fund's portfolio was invested in equities, 21% of assets were in fixed-income investments, 7% were allocated to commodities and real estate, and the remainder of the Fund's assets were held in cash. Q With 64% of assets held in equities as of the end of the period, how did the Fund's equity positioning affect performance, and how was the Fund positioned within the asset class during the six months ended April 30, 2012? A The Fund's allocation to equities played an important role in its outperformance of the Barclays Index during the past six months, as stocks * Diversification does not assure a profit or protect against loss in a declining market. 4 Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 rallied behind robust corporate earnings and positive investor sentiment. While we are not overwhelmingly bullish on the global economic outlook, we believe stocks have been more than compensating investors for the risks. Stocks typically trade at a "risk premium" relative to bonds -- a gap that can be measured by comparing stocks' earnings yield (or earnings divided by stock prices) to the yield on the 10-year U.S. Treasury note. As of April 30, 2012, the gap stood at its highest level in more than 50 years, indicating that stock prices are historically cheap relative to government bonds. Similarly, the difference between stocks' free-cash-flow yield (free cash flow divided by stock prices) and the yields on investment-grade corporate bonds also was at its largest level in 50 years. In our view, the gaps indicate a growing potential for stocks to outperform bonds in the years ahead. Accordingly, we made a modest increase to the Fund's equity allocation during the six months ended April 30, 2012. Our approach within the Fund's equity allocation is to have diversified portfolio exposure to higher-quality, dividend-paying stocks** in the developed markets and the faster-growing markets in Asia. That line of thinking forms the basis for the Fund's holdings in stocks such as Merck, Philip Morris International, Nestle, and Coca-Cola, as well as exposure to markets such as Hong Kong, Singapore, Indonesia, the Philippines, and Japan. The Fund's equity allocation is divided among developed-market international equities (24% of total Fund assets), domestic equities (19%), and the emerging markets (21%). Although we have a positive view on equities in general, the continued presence of important risk factors -- most notably, the debt crisis in Europe -- has prompted us to "hedge" a portion of the Fund's equity exposure through positions that have the potential to rise in value when the market declines. We believe the hedging helps to manage the risk of severe market downturns and provides a smoother ride in terms of the Fund's day-to-day volatility. Q Could you discuss the Fund's positioning in the global bond markets during the six months ended April 30, 2012? A While we are guarded on the outlook for bonds as an asset class, we believe that there are opportunities to invest in securities that offer the combination of attractive yields and favorable underlying credit fundamentals. We have been finding such opportunities to be most prevalent in corporate bonds in both the developed and emerging markets, as well as in selected sovereign-debt issues. The Fund continues to hold no positions in the government debt of the major developed markets. In the United States and the United Kingdom, for instance, budget deficits and debt-to-gross domestic product ** Dividends are not guaranteed. Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 5 ratios are extraordinarily high, and rising, and yet nominal bond yields have remained extremely depressed. We believe that combination makes government bonds in most western developed markets to be the least attractive asset class. Q How was the Fund positioned in commodities as of April 30, 2012? A The Fund's commodity position has been focused on industrial metals, such as platinum and palladium, that could benefit from China's strong long-term growth trajectory. We achieved the Fund's industrial metals exposure through exchange-traded funds (ETFs). The Fund continued to hold no direct exposure to oil as of period end. While the commodity was propped up by political instability in the Middle East early in the six-month period, we believed it would eventually be pressured by sluggish global growth once the fears moved into the background. However, the Fund does hold positions in the stocks and bonds of large, integrated oil companies, which ensures that the portfolio maintains at least some peripheral exposure to oil prices. The portfolio also held no position in gold at the close of the period on April 30, 2012. We sold the Fund out of gold during the summer of 2011, and we bought back in, briefly, in early 2012 before once again closing out the Fund's position. While we continue to think that gold will be supported by the extremely accommodative policies of the world's central banks, we also believe that investor sentiment toward gold remains too favorable. That said, we remain on the lookout for a sell-off in gold that would provide an opportunity to establish a Fund position in the commodity at a lower price. Q Do you have any closing thoughts for investors? A We are cautious on the outlook for the global economy. We believe that U.S. growth is likely to come in at a tepid rate of about 1.5% to 2%, while Europe is already experiencing a recession. In addition, the potential risks remain high as long as the peripheral European nations continue to carry unsustainably high levels of government debt. Fortunately, we have the ability to invest the Fund anywhere in the world, and across the full range of asset classes, in an attempt to find attractive investment opportunities. We believe this approach could help us to achieve the Fund's mandate of providing appropriate investors with a positive real (or inflation-adjusted) return -- an important consideration during a time in which the majority of conservative, fixed-income instruments have been offering yields at levels below the rate of inflation. Please refer to the Schedule of Investments on pages 16-29 for a full listing of Fund securities. 6 Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 All investments are subject to risk, including the possible loss of principal. Pioneer Multi-Asset Real Return ("MARR") Fund has the ability to invest in a wide variety of securities and asset classes. In addition, the Fund is non-diversified, which means it can invest a higher percentage of its assets in the securities of any one or more issuers. This will increase the Fund's potential risk exposure. The Fund may invest in underlying funds (ETFs and unit investment trusts). In addition to the Fund's operating expenses, you will indirectly bear the operating expenses of investments in any underlying funds. The Fund and some of the underlying funds employ leverage, which increases the volatility of investment returns and subjects the Fund to magnified losses if an underlying fund's investments decline in value. The Fund and some of the underlying funds may use derivatives, such as options and futures, which can be illiquid, may disproportionately increase losses, and have a potentially large impact on Fund performance. The Fund and some of the underlying funds may employ short selling, a speculative strategy. Unlike the possible loss on a security that is purchased, there is no limit on the amount of loss on an appreciating security that is sold short. The Fund may invest in inflation-linked securities. As inflationary expectations increase, inflation-linked securities may become more attractive, because they protect future interest payments against inflation. Conversely, as inflationary concerns decrease, inflation-linked securities will become less attractive and less valuable. 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 may invest in subordinated securities which may be disproportionately adversely affected by a default or even a perceived decline in creditworthiness of the issuer. 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 may invest in event-linked bonds. The return of principal and the payment of interest on event-linked bonds 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 commodities. The value of commodity-linked derivatives may be affected by changes in overall market movements, commodity index Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 7 volatility, changes in interest rates, factors affecting a particular industry or commodity, international economic, political and regulatory developments, supply and demand, and governmental regulatory policies. Investments in equity securities are subject to price fluctuation. Small-and mid-cap stocks involve greater risks and volatility than large-cap stocks. International investments are subject to special risks, including currency fluctuations, and social, economic and political uncertainties, which could increase volatility. These risks are magnified in emerging markets. Investments in fixed-income securities involve interest rate, credit, inflation, and reinvestment risks. As interest rates rise, the value of fixed-income securities falls. 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 prepayments. Prepayment risk is the chance that mortgage-backed bonds will be paid off early if falling interest rates prompt homeowners to refinance their mortgages. High-yield bonds possess greater price volatility, illiquidity, and possibility of default. There is no assurance that these and other strategies used by the Fund or underlying funds will be successful. These risks may increase share price volatility. Please see the prospectus for a more complete discussion of the Fund's risks. Past performance is no guarantee of future results, and there is no guarantee that market forecasts discussed will be realized. 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. These statements should not be relied upon for any other purposes. 8 Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 Portfolio Summary | 4/30/12 Sector Distribution -------------------------------------------------------------------------------- (As a percentage of long-term holdings) [THE DATA BELOW IS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL.] Financials 39.3% Industrials 10.8% Consumer Discretionary 9.6% Consumer Staples 9.5% Materials 8.8% Energy 7.2% Health Care 5.3% Information Technology 3.1% Government 2.8% Utilities 1.8% Telecommunication Services 1.8% Portfolio Diversification -------------------------------------------------------------------------------- (As a percentage of total investment portfolio) [THE DATA BELOW IS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL.] International Common Stocks 47.4% U.S. Common Stocks 16.9% International Corporate Bonds 12.9% Exchange Traded Funds 7.4% Temporary Cash Investment 6.7% U.S. Corporate Bonds 4.6% Foreign Government Bonds 2.6% Convertible Corporate Bonds 1.2% Senior Secured Loans 0.3% 10 Largest Holdings -------------------------------------------------------------------------------- (As a percentage of total long-term holdings)* 1. ETFS Physical Palladium Shares 3.36% -------------------------------------------------------------------------------- 2. ETFS Platinum Trust 2.25 -------------------------------------------------------------------------------- 3. Bankia SA, 4.375%, 2/14/17 2.00 -------------------------------------------------------------------------------- 4. Merck & Co., Inc. 1.64 -------------------------------------------------------------------------------- 5. Philip Morris International, Inc. 1.57 -------------------------------------------------------------------------------- 6. Swiss Re AG 1.39 -------------------------------------------------------------------------------- 7. The Coca-Cola Co. 1.36 -------------------------------------------------------------------------------- 8. Standard Chartered Plc 1.36 -------------------------------------------------------------------------------- 9. Allianz SE 1.35 -------------------------------------------------------------------------------- 10. Industrial & Commercial Bank of China, Ltd. 1.35 -------------------------------------------------------------------------------- * 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. Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 9 Prices and Distributions | 4/30/12 Net Asset Value per Share -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Class 4/30/12 10/31/11 -------------------------------------------------------------------------------- A $11.60 $11.25 -------------------------------------------------------------------------------- C $11.52 $11.15 -------------------------------------------------------------------------------- Y $11.62 $11.29 -------------------------------------------------------------------------------- Distributions per Share: 11/1/11-4/30/12 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Net Investment Short-Term Long-Term Class Income Capital Gains Capital Gains -------------------------------------------------------------------------------- A $0.2735 $ -- $ -- -------------------------------------------------------------------------------- C $0.2056 $ -- $ -- -------------------------------------------------------------------------------- Y $0.3093 $ -- $ -- -------------------------------------------------------------------------------- The Barclays Capital U.S. Treasury TIPS 1-10 Year Index is an unmanaged index comprised of U.S. Treasury Inflation Protected Securities (TIPS) having a maturity of at least 1 year and less than 10 years. Index returns 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 11-13. 10 Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 Performance Update | 4/30/12 Class A Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Pioneer Multi-Asset Real Return Fund at public offering price, compared to that of the Barclays Capital U.S. Treasury TIPS 1-10 Year Index. Average Annual Total Returns (As of April 30, 2012) -------------------------------------------------------------------------------- Net Asset Public Offering Period Value (NAV) Price (POP) -------------------------------------------------------------------------------- Life-of-Class (5/3/10) 9.50% 7.01% 1 Year 4.99 0.30 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated March 1, 2012, as revised April 27, 2012) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 1.37% 1.33% -------------------------------------------------------------------------------- [THE DATA BELOW IS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL.] Value of $10,000 Investment Barclays Capital Pioneer Multi-Asset U.S. Treasury TIPS Real Return Fund 1-10 Year Index 5/10 $ 9,550 $10,000 4/11 11,112 10,789 4/12 11,667 11,546 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 contractual expense limitations currently in effect through March 1, 2013 for Class A shares. There can be no assurance that Pioneer will extend the expense limitations beyond such time. Please see the prospectus 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 Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 11 Performance Update | 4/30/12 Class C Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Pioneer Multi-Asset Real Return Fund, compared to that of the Barclays Capital U.S. Treasury TIPS 1-10 Year Index. Average Annual Total Returns (As of April 30, 2012) -------------------------------------------------------------------------------- If If Period Held Redeemed -------------------------------------------------------------------------------- Life-of-Class (5/3/10) 8.66% 8.66% 1 Year 4.19 4.19 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated March 1, 2012, as revised April 27, 2012) -------------------------------------------------------------------------------- Gross -------------------------------------------------------------------------------- 2.13% -------------------------------------------------------------------------------- [THE DATA BELOW IS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL.] Value of $10,000 Investment Barclays Capital Pioneer Multi-Asset U.S. Treasury TIPS Real Return Fund 1-10 Year Index 5/10 $10,000 $10,000 4/11 11,554 10,789 4/12 12,039 11,546 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 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. 12 Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 Performance Update | 4/30/12 Class Y Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $5 million investment made in Pioneer Multi-Asset Real Return Fund, compared to that of the Barclays Capital U.S. Treasury TIPS 1-10 Year Index. Average Annual Total Returns (As of April 30, 2012) -------------------------------------------------------------------------------- If If Period Held Redeemed -------------------------------------------------------------------------------- Life-of-Class (5/3/10) 9.83% 9.83% 1 Year 5.32 5.32 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated March 1, 2012, as revised April 27, 2012) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 1.11% 1.03% -------------------------------------------------------------------------------- [THE DATA BELOW IS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL.] Value of $5 Million Investment Barclays Capital Pioneer Multi-Asset U.S. Treasury TIPS Real Return Fund 1-10 Year Index 5/10 $5,000,000 $5,000,000 4/11 5,832,730 5,394,260 4/12 6,143,064 5,773,026 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 contractual expense limitations currently in effect through March 1, 2013 for Class Y shares. There can be no assurance that Pioneer will extend the expense limitations beyond such time. Please see the prospectus 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 Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 13 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 Multi-Asset Real Return Fund Based on actual returns from November 1, 2011, through April 30, 2012. -------------------------------------------------------------------------------- Share Class A C Y -------------------------------------------------------------------------------- Beginning Account Value on 11/1/11 $1,000.00 $1,000.00 $1,000.00 -------------------------------------------------------------------------------- Ending Account Value (after expenses) on 4/30/12 $1,057.40 $1,053.10 $1,058.80 -------------------------------------------------------------------------------- Expenses Paid During Period* $6.24 $10.26 $4.71 -------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized expense ratios plus the expense ratios of the underlying funds. These combined totals were 1.22%, 2.01% and 0.92% for Class A, Class C and Class Y shares, respectively, multiplied by the average account value over the period, and then multiplied by 182/366 (to reflect the one-half year period) to calculate the Expenses Paid During Period in the table above. 14 Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 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 Multi-Asset Real Return Fund Based on a hypothetical 5% return per year before expenses, reflecting the period from November 1, 2011, through April 30, 2012. -------------------------------------------------------------------------------- Share Class A C Y -------------------------------------------------------------------------------- Beginning Account Value on 11/1/11 $1,000.00 $1,000.00 $1,000.00 -------------------------------------------------------------------------------- Ending Account Value (after expenses) on 4/30/12 $1,018.80 $1,014.87 $1,020.29 -------------------------------------------------------------------------------- Expenses Paid During Period* $6.12 $10.07 $4.62 -------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized expense ratios plus the expense ratios of the underlying funds. These combined totals were 1.22%, 2.01% and 0.92% for Class A, Class C and Class Y shares, respectively, multiplied by the average account value over the period, and then multiplied by 182/366 (to reflect the one-half year period) to calculate the Expenses Paid During Period in the table above. Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 15 Schedule of Investments | 4/30/12 (Consolidated) (unaudited) -------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value -------------------------------------------------------------------------------------------------- CONVERTIBLE CORPORATE BONDS -- 1.2% DIVERSIFIED FINANCIALS -- 1.2% Asset Management & Custody Banks -- 1.2% 3,470,000 BBB/NR Apollo Investment Corp., 5.75%, 1/15/16 $ 3,396,262 1,500,000 BBB/NR Ares Capital Corp., 5.125%, 6/1/16 (144A) 1,507,500 ------------ $ 4,903,762 ------------ Total Diversified Financials $ 4,903,762 -------------------------------------------------------------------------------------------------- TOTAL CONVERTIBLE CORPORATE BONDS (Cost $4,503,609) $ 4,903,762 -------------------------------------------------------------------------------------------------- Shares -------------------------------------------------------------------------------------------------- COMMON STOCKS -- 62.2% ENERGY -- 2.5% Oil & Gas Equipment & Services -- 0.3% 54,483 AMEC Plc $ 1,007,001 -------------------------------------------------------------------------------------------------- Integrated Oil & Gas -- 2.2% 40,910 Chevron Corp. $ 4,359,370 98,181 Total SA 4,700,886 ------------ $ 9,060,256 ------------ Total Energy $ 10,067,257 -------------------------------------------------------------------------------------------------- MATERIALS -- 4.7% Diversified Chemicals -- 0.5% 19,929 PPG Industries, Inc. $ 2,097,328 -------------------------------------------------------------------------------------------------- Fertilizers & Agricultural Chemicals -- 0.5% 38,943 Yara International ASA $ 1,915,103 -------------------------------------------------------------------------------------------------- Specialty Chemicals -- 1.3% 56,966 Ecolab, Inc. $ 3,628,165 30,000 Shin-Etsu Chemical Co, Ltd. 1,730,222 ------------ $ 5,358,387 -------------------------------------------------------------------------------------------------- Construction Materials -- 1.7% 8,708,500 Holcim Indonesia Tbk PT $ 2,437,755 1,217,500 Indocement Tunggal Prakarsa Tbk PT 2,383,368 136,600 Siam Cement PCL 1,854,014 ------------ $ 6,675,137 -------------------------------------------------------------------------------------------------- Metal & Glass Containers -- 0.5% 661,577 Nampak, Ltd. $ 1,909,579 -------------------------------------------------------------------------------------------------- Steel -- 0.2% 9,949,000 Krakatau Steel Persero Tbk PT $ 929,723 ------------ Total Materials $ 18,885,257 -------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 16 Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 ------------------------------------------------------------------------------------------------- Floating S&P/Moody's Rate (b) Ratings Shares (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------- CAPITAL GOODS -- 6.8% Aerospace & Defense -- 0.3% 14,017 United Technologies Corp. $ 1,144,348 ------------------------------------------------------------------------------------------------- Construction & Engineering -- 0.6% 3,163,500 Surya Semesta Internusa Tbk PT $ 412,036 46,294 Vinci SA 2,148,763 ------------ $ 2,560,799 ------------------------------------------------------------------------------------------------- Industrial Conglomerates -- 3.8% 12,829 3M Co. $ 1,146,399 10,219,700 Alliance Global Group, Inc. 2,983,134 261,000 Fraser and Neave, Ltd. 1,483,911 30,059 Jardine Matheson Holdings, Ltd. 1,488,968 66,498 Jardine Strategic Holdings, Ltd. 2,137,776 466,000 Keppel Corp., Ltd. 4,148,385 19,930 SM Investments Corp. 329,453 25,477 Tyco International, Ltd. 1,430,024 ------------ $ 15,148,050 ------------------------------------------------------------------------------------------------- Construction & Farm Machinery & Heavy Trucks -- 1.4% 13,844 Deere & Co. $ 1,140,192 76,600 Komatsu, Ltd. 2,215,863 691,000 United Tractors Tbk PT 2,216,286 ------------ $ 5,572,341 ------------------------------------------------------------------------------------------------- Industrial Machinery -- 0.5% 5,200 FANUC Corp. $ 883,483 54,000 Nabtesco Corp. 1,161,295 ------------ $ 2,044,778 ------------------------------------------------------------------------------------------------- Trading Companies & Distributors -- 0.2% 64,400 Sumitomo Corp. $ 912,557 ------------ Total Capital Goods $ 27,382,873 ------------------------------------------------------------------------------------------------- COMMERCIAL SERVICES & SUPPLIES -- 0.4% Environmental & Facilities Services -- 0.4% 3,273,000 China Everbright International, Ltd. $ 1,546,083 ------------ Total Commercial Services & Supplies $ 1,546,083 ------------------------------------------------------------------------------------------------- TRANSPORTATION -- 1.5% Air Freight & Logistics -- 0.1% 10,745 Oesterreichische Post AG $ 381,143 ------------------------------------------------------------------------------------------------- Railroads -- 1.1% 87,356 CSX Corp. $ 1,948,912 18,604 Norfolk Southern Corp. 1,356,790 9,700 Union Pacific Corp. 1,090,668 ------------ $ 4,396,370 ------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 17 Schedule of Investments | 4/30/12 (Consolidated) (unaudited) (continued) --------------------------------------------------------------------------------------------------- Floating S&P/Moody's Rate (b) Ratings Shares (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------- Airport Services -- 0.3% 1,836,000 Beijing Capital International Airport Co., Ltd. $ 1,198,348 ------------ Total Transportation $ 5,975,861 --------------------------------------------------------------------------------------------------- AUTOMOBILES & COMPONENTS -- 1.8% Auto Parts & Equipment -- 0.8% 52,457 Autoliv, Inc. $ 3,291,152 --------------------------------------------------------------------------------------------------- Automobile Manufacturers -- 1.0% 175,600 Astra International Tbk PT $ 1,352,253 26,870 Bayerische Motoren Werke AG 2,554,435 ------------ $ 3,906,688 ------------ Total Automobiles & Components $ 7,197,840 --------------------------------------------------------------------------------------------------- CONSUMER DURABLES & APPAREL -- 1.1% Home Furnishings -- 0.4% 23,500 Mohawk Industries, Inc.* $ 1,574,970 --------------------------------------------------------------------------------------------------- Apparel, Accessories & Luxury Goods -- 0.7% 3,621 The Swatch Group AG $ 1,670,918 6,837 VF Corp. 1,039,566 ------------ $ 2,710,484 ------------ Total Consumer Durables & Apparel $ 4,285,454 --------------------------------------------------------------------------------------------------- CONSUMER SERVICES -- 1.4% Casinos & Gaming -- 0.9% 716,000 Galaxy Entertainment Group, Ltd.* $ 2,226,106 498,750 Wynn Macau, Ltd. 1,591,827 ------------ $ 3,817,933 --------------------------------------------------------------------------------------------------- Restaurants -- 0.5% 18,539 McDonald's Corp. $ 1,806,626 ------------ Total Consumer Services $ 5,624,559 --------------------------------------------------------------------------------------------------- MEDIA -- 1.0% Movies & Entertainment -- 0.6% 56,145 The Walt Disney Co. $ 2,420,411 --------------------------------------------------------------------------------------------------- Publishing -- 0.4% 557,000 Singapore Press Holdings, Ltd. $ 1,786,346 ------------ Total Media $ 4,206,757 --------------------------------------------------------------------------------------------------- RETAILING -- 3.1% Distributors -- 0.3% 620,154 Li & Fung, Ltd. $ 1,321,245 --------------------------------------------------------------------------------------------------- Internet Retail -- 0.3% 1,028 Rakuten, Inc. $ 1,146,828 --------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 18 Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 ------------------------------------------------------------------------------------------------- Floating S&P/Moody's Rate (b) Ratings Shares (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------- General Merchandise Stores -- 0.3% 1,291,000 Mitra Adiperkasa Tbk PT $ 974,455 ------------------------------------------------------------------------------------------------- Apparel Retail -- 1.1% 888,964 Belle International Holdings, Ltd. $ 1,736,565 8,110,000 Emperor Watch & Jewellery, Ltd. 1,144,154 39,671 Hennes & Mauritz AB* 1,363,337 ------------ $ 4,244,056 ------------------------------------------------------------------------------------------------- Home Improvement Retail -- 0.4% 3,156,500 Ace Hardware Indonesia Tbk PT $ 1,765,747 ------------------------------------------------------------------------------------------------- Specialty Stores -- 0.7% 1,107,226 L'Occitane International SA $ 2,945,943 ------------ Total Retailing $ 12,398,274 ------------------------------------------------------------------------------------------------- FOOD & STAPLES RETAILING -- 0.4% Food Retail -- 0.4% 266,407 Pick n Pay Stores, Ltd. $ 1,542,092 ------------ Total Food & Staples Retailing $ 1,542,092 ------------------------------------------------------------------------------------------------- FOOD, BEVERAGE & TOBACCO -- 7.9% Brewers -- 0.7% 31,119 Carlsberg A/S $ 2,682,943 ------------------------------------------------------------------------------------------------- Distillers & Vintners -- 0.3% 13,034 Pernod-Ricard SA $ 1,353,113 ------------------------------------------------------------------------------------------------- Soft Drinks -- 1.2% 65,515 The Coca-Cola Co. $ 5,000,105 ------------------------------------------------------------------------------------------------- Packaged Foods & Meats -- 3.2% 44,191 Campbell Soup Co. $ 1,494,982 41,628 Kraft Foods, Inc. 1,659,708 488,000 Mayora Indah Tbk PT 1,061,255 70,991 Nestle SA 4,349,442 5,854,000 Salim Ivomas Pratama Tbk PT* 871,254 2,197,600 Universal Robina Corp. 3,383,602 ------------ $ 12,820,243 ------------------------------------------------------------------------------------------------- Tobacco -- 2.5% 92,736 Altria Group, Inc. $ 2,987,027 259 Japan Tobacco, Inc. 1,430,616 64,306 Philip Morris International, Inc. 5,756,030 ------------ $ 10,173,673 ------------ Total Food, Beverage & Tobacco $ 32,030,077 ------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 19 Schedule of Investments | 4/30/12 (Consolidated) (unaudited) (continued) -------------------------------------------------------------------------------------------------- Floating S&P/Moody's Rate (b) Ratings Shares (unaudited) (unaudited) Value -------------------------------------------------------------------------------------------------- HOUSEHOLD & PERSONAL PRODUCTS -- 0.3% Personal Products -- 0.3% 15,934 The Estee Lauder Companies, Inc. $ 1,041,287 ------------ Total Household & Personal Products $ 1,041,287 -------------------------------------------------------------------------------------------------- HEALTH CARE EQUIPMENT & SERVICES -- 0.1% Health Care Equipment -- 0.1% 4,087 Fresenius SE & Co. KGaA $ 407,940 ------------ Total Health Care Equipment & Services $ 407,940 -------------------------------------------------------------------------------------------------- PHARMACEUTICALS, BIOTECHNOLOGY & LIFE SCIENCES -- 4.7% Pharmaceuticals -- 4.7% 53,050 Bristol-Myers Squibb Co. $ 1,770,278 132,585 GlaxoSmithKline Plc 3,067,462 34,343 Johnson & Johnson 2,235,386 151,947 Merck & Co., Inc. 5,962,400 31,966 Novartis AG 1,762,497 22,189 Roche Holding AG 4,054,377 ------------ $ 18,852,400 ------------ Total Pharmaceuticals, Biotechnology & Life Sciences $ 18,852,400 -------------------------------------------------------------------------------------------------- BANKS -- 8.5% Diversified Banks -- 8.0% 180,600 Bangkok Bank PCL $ 1,119,483 1,215,789 Bank Mandiri Persero Tbk PT 976,956 123,477 Bank of East Asia, Ltd. 459,677 1,319,900 Bank of the Philippine Islands 2,301,475 2,519,200 Bank Rakyat Indonesia Persero Tbk PT 1,820,230 1,995,340 BDO Unibank, Inc. 3,127,293 531,500 BOC Hong Kong Holdings, Ltd. 1,642,227 7,430,280 Industrial & Commercial Bank of China, Ltd. 4,938,381 2,023,600 Krung Thai Bank PCL 1,181,337 625,662 Metropolitan Bank & Trust 1,352,613 69,489 Nedbank Group, Ltd. 1,513,719 161,694 Oversea-Chinese Banking Corp, Ltd. 1,167,490 569,700 Public Bank Bhd 2,574,602 23,737 Royal Bank of Canada 1,372,518 342,030 Security Bank Corp. 1,158,309 203,354 Standard Chartered Plc 4,984,915 46,146 United Overseas Bank, Ltd. 715,877 ------------ $ 32,407,102 -------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 20 Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Rate (b) Ratings Shares (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- Regional Banks -- 0.5% 57,700 First Republic Bank* $ 1,905,831 ------------ Total Banks $ 34,312,933 ---------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 2.9% Multi-Sector Holdings -- 1.4% 132,802 Ayala Corp. $ 1,351,831 4,103,308 First Pacific Co., Ltd. 4,453,740 ------------ $ 5,805,571 ---------------------------------------------------------------------------------------------------- Specialized Finance -- 0.6% 38,234 Deutsche Boerse AG $ 2,400,492 ---------------------------------------------------------------------------------------------------- Consumer Finance -- 0.5% 39,168 Capital One Financial Corp. $ 2,173,041 ---------------------------------------------------------------------------------------------------- Asset Management & Custody Banks -- 0.4% 11,580 Franklin Resources, Inc. $ 1,453,406 ------------ Total Diversified Financials $ 11,832,510 ---------------------------------------------------------------------------------------------------- INSURANCE -- 4.5% Multi-line Insurance -- 2.0% 44,343 Allianz SE $ 4,941,273 13,127 Zurich Insurance Group AG 3,212,228 ------------ $ 8,153,501 ---------------------------------------------------------------------------------------------------- Reinsurance -- 2.5% 33,526 Muenchener Rueckversicherungs AG $ 4,867,500 81,476 Swiss Re AG 5,110,059 ------------ $ 9,977,559 ------------ Total Insurance $ 18,131,060 ---------------------------------------------------------------------------------------------------- REAL ESTATE -- 3.6% Industrial REITs -- 0.4% 908,511 Ascendas Real Estate Investment Trust $ 1,526,367 ---------------------------------------------------------------------------------------------------- Retail REITs -- 0.2% 570,381 CapitaMall Trust $ 829,172 ---------------------------------------------------------------------------------------------------- Diversified Real Estate Activities -- 1.2% 50 Swire Pacific, Ltd. $ 588 1,093,235 Swire Properties, Ltd. 2,988,542 326,000 Wharf Holdings, Ltd. 1,936,145 ------------ $ 4,925,275 ---------------------------------------------------------------------------------------------------- Real Estate Operating Companies -- 0.4% 52,687 Deutsche Wohnen AG $ 774,641 195,201 IMMOFINANZ AG 686,179 ------------ $ 1,460,820 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 21 Schedule of Investments | 4/30/12 (Consolidated) (unaudited) (continued) ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Rate (b) Ratings Shares (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- Real Estate Development -- 1.4% 13,356,000 Bumi Serpong Damai PT $ 2,074,261 48,891 Conwert Immobilien Invest SE 582,641 37,193,000 Megaworld Corp. 1,908,780 2,028,500 Summarecon Agung Tbk PT 381,115 1,376,300 Supalai PCL 734,027 ------------ $ 5,680,824 ------------ Total Real Estate $ 14,422,458 ---------------------------------------------------------------------------------------------------- SOFTWARE & SERVICES -- 1.9% Internet Software & Services -- 0.5% 65,600 Tencent Holdings, Ltd. $ 2,053,366 ---------------------------------------------------------------------------------------------------- IT Consulting & Other Services -- 0.2% 4,782 International Business Machines Corp. $ 990,257 ---------------------------------------------------------------------------------------------------- Systems Software -- 1.2% 113,200 Microsoft Corp. $ 3,624,664 40,763 Oracle Corp. 1,198,025 ------------ $ 4,822,689 ------------ Total Software & Services $ 7,866,312 ---------------------------------------------------------------------------------------------------- TECHNOLOGY HARDWARE & EQUIPMENT -- 0.3% Electronic Components -- 0.3% 12,400 Kyocera Corp. $ 1,209,510 ------------ Total Technology Hardware & Equipment $ 1,209,510 ---------------------------------------------------------------------------------------------------- SEMICONDUCTORS & SEMICONDUCTOR EQUIPMENT -- 0.5% Semiconductor Equipment -- 0.5% 24,200 Cymer, Inc.* $ 1,254,528 17,750 Lam Research Corp.* 739,288 ------------ $ 1,993,816 ------------ Total Semiconductors & Semiconductor Equipment $ 1,993,816 ---------------------------------------------------------------------------------------------------- TELECOMMUNICATION SERVICES -- 1.6% Integrated Telecommunication Services -- 0.7% 1,194,000 Singapore Telecommunications, Ltd. $ 3,006,765 ---------------------------------------------------------------------------------------------------- Wireless Telecommunication Services -- 0.9% 55,300 Softbank Corp. $ 1,650,218 657,056 Vodafone Group Plc 1,823,086 ------------ $ 3,473,304 ------------ Total Telecommunication Services $ 6,480,069 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 22 Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 --------------------------------------------------------------------------------------------------- Floating S&P/Moody's Rate (b) Ratings Shares (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------- UTILITIES -- 0.8% Electric Utilities -- 0.3% 347,125 Terna Rete Elettrica Nazionale S.p.A. $ 1,290,559 --------------------------------------------------------------------------------------------------- Gas Utilities -- 0.3% 244,917 Snam S.p.A. $ 1,164,781 --------------------------------------------------------------------------------------------------- Independent Power Producers & Energy Traders -- 0.2% 26,200 Electric Power Development Co., Ltd. $ 724,497 ------------ Total Utilities $ 3,179,837 --------------------------------------------------------------------------------------------------- TOTAL COMMON STOCKS (Cost $227,060,830) $250,872,516 --------------------------------------------------------------------------------------------------- Principal Amount ($) --------------------------------------------------------------------------------------------------- CORPORATE BONDS -- 16.9% ENERGY -- 4.0% Oil & Gas Drilling -- 0.5% 2,000,000 BB+/Ba1 Precision Drilling Corp., 6.625%, 11/15/20 $ 2,085,000 --------------------------------------------------------------------------------------------------- Integrated Oil & Gas -- 1.2% 4,323,000 BBB-/Baa2 Lukoil International Finance BV, 7.25%, 11/5/19 (144A) $ 4,874,182 --------------------------------------------------------------------------------------------------- Oil & Gas Exploration & Production -- 1.5% 3,000,000 BBB/Baa1 Gazprom OAO Via Gaz Capital SA, 6.212%, 11/22/16 (144A) $ 3,272,070 2,153,000 BBB/Baa1 Gazprom OAO Via Gaz Capital SA, 6.51%, 3/7/22 (144A) 2,363,348 350,000 BB+/Ba3 Whiting Petroleum Corp., 6.5%, 10/1/18 372,750 ------------ $ 6,008,168 --------------------------------------------------------------------------------------------------- Coal & Consumable Fuels -- 0.8% 1,400,000 NR/Ba1 Adaro Indonesia PT, 7.625%, 10/22/19 (144A) $ 1,524,320 1,500,000 BB/Ba3 Bumi Investment Pte, Ltd., 10.75%, 10/6/17 (144A) 1,612,500 ------------ $ 3,136,820 ------------ Total Energy $ 16,104,170 --------------------------------------------------------------------------------------------------- MATERIALS -- 3.2% Diversified Chemicals -- 0.5% 2,000,000 BB-/Ba3 Celanese US Holdings LLC, 5.875%, 6/15/21 $ 2,145,000 --------------------------------------------------------------------------------------------------- Metal & Glass Containers -- 0.3% 1,000,000 BB-/B1 Crown Cork & Seal Co., Inc., 7.375%, 12/15/26 $ 1,045,000 --------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 23 Schedule of Investments | 4/30/12 (Consolidated) (unaudited) (continued) ------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------------- Paper Packaging -- 1.1% 1,100,000 BB/B1 Sealed Air Corp., 6.875%, 7/15/33 (144A) $ 1,067,000 2,900,000 BBB+/Baa2 Sonoco Products Co., 5.75%, 11/1/40 3,200,695 ------------ $ 4,267,695 ------------------------------------------------------------------------------------------------------------- Steel -- 0.6% 2,500,000 BBB-/Baa3 ArcelorMittal, 5.25%, 8/5/20 $ 2,467,708 ------------------------------------------------------------------------------------------------------------- Forest Products -- 0.7% EURO 2,000,000 BB+/Ba1 Smurfit Kappa Acquisitions, 7.75%, 11/15/19 (144A) $ 2,832,611 ------------ Total Materials $ 12,758,014 ------------------------------------------------------------------------------------------------------------- CAPITAL GOODS -- 1.0% Building Products -- 0.4% 1,500,000 BBB-/Ba2 Masco Corp., 5.85%, 3/15/17 $ 1,550,384 ------------------------------------------------------------------------------------------------------------- Construction & Farm Machinery & Heavy Trucks -- 0.6% 2,700,000 BB/Ba3 Lonking Holdings, Ltd., 8.5%, 6/3/16 (144A) $ 2,538,000 ------------ Total Capital Goods $ 4,088,384 ------------------------------------------------------------------------------------------------------------- CONSUMER DURABLES & APPAREL -- 0.3% Housewares & Specialties -- 0.3% 1,000,000 BB-/Ba3 Reynolds Group Issuer, Inc., 7.875%, 8/15/19 (144A) $ 1,080,000 ------------ Total Consumer Durables & Apparel $ 1,080,000 ------------------------------------------------------------------------------------------------------------- BANKS -- 6.7% Diversified Banks -- 5.2% 1,000,000 BBB+/A3 Bangkok Bank PCL Hong Kong, 4.8%, 10/18/20 (144A) $ 1,019,833 3,975,000 A-/A3 Bank of East Asia, Ltd., 6.125%, 7/16/20 4,236,642 EURO 6,500,000 NR/Baa3 Bankia SA, 4.375%, 2/14/17 7,335,045 2,000,000 NR/A3 Industrial & Commercial Bank of China Asia, Ltd., 5.125%, 11/30/20 2,066,758 5,254,000 BBB+/A2 Intesa Sanpaolo S.p.A., 6.5%, 2/24/21 (144A) 4,773,564 1,600,000 A/A1 Societe Generale SA, 5.2%, 4/15/21 (144A) 1,506,022 ------------ $ 20,937,864 ------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 24 Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 --------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------- Regional Banks -- 1.5% 2,000,000 6.75 BBB/Baa3 PNC Financial Services Group, Inc., Floating Rate Note, 7/29/49 (Perpetual) $ 2,096,340 1,750,000 BB+/Ba3 Regions Financial Corp., 5.75%, 6/15/15 1,846,250 2,000,000 5.46 BBB+/Baa1 State Street Capital Trust III, Floating Rate Note, 1/29/49 (Perpetual) 2,007,840 ------------ $ 5,950,430 ------------ Total Banks $ 26,888,294 --------------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 0.7% Other Diversified Financial Services -- 0.1% 300,000 7.50 BB-/NR Queen Street II Capital, Ltd., Floating Rate Note, 4/9/14 (Cat Bond) (144A) $ 291,300 250,000 0.00 NR/NR Residential Reinsurance 2010, Ltd., Floating Rate Note, 6/6/13 (Cat Bond) (144A) 245,100 ------------ $ 536,400 --------------------------------------------------------------------------------------------------------- Investment Banking & Brokerage -- 0.6% 2,500,000 BBB/A3 Macquarie Group, Ltd., 6.0%, 1/14/20 (144A) $ 2,494,865 ------------ Total Diversified Financials $ 3,031,265 --------------------------------------------------------------------------------------------------------- INSURANCE -- 0.2% Reinsurance -- 0.2% 500,000 12.37 B/NR Montana Re, Ltd., Floating Rate Note, 1/8/14 (Cat Bond) (144A) $ 489,250 250,000 14.99 B-/NR Successor X, Ltd., Floating Rate Note, 1/7/14 (Cat Bond) (144A) 246,525 ------------ $ 735,775 ------------ Total Insurance $ 735,775 --------------------------------------------------------------------------------------------------------- UTILITIES -- 0.8% Independent Power Producers & Energy Traders -- 0.8% 400,000 0.00 BB/NR East Lane Re, Ltd., Floating Rate Note, 3/13/15 (Cat Bond) (144A) $ 399,000 1,400,000 BBB+/Baa1 Southern Power Co., 5.15%, 9/15/41 1,514,026 1,400,000 NR/B2 Star Energy Geothermal Wayang Windu, Ltd., 11.5%, 2/12/15 (144A) 1,538,320 ------------ $ 3,451,346 ------------ Total Utilities $ 3,451,346 --------------------------------------------------------------------------------------------------------- TOTAL CORPORATE BONDS (Cost $66,282,889) $ 68,137,248 --------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 25 Schedule of Investments | 4/30/12 (Consolidated) (unaudited) (continued) -------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value -------------------------------------------------------------------------------------------------------- FOREIGN GOVERNMENT BONDS -- 2.5% CLP 2,290,000,000 NR/NR Bonos del Banco Central de Chile en Pesos, 6.0%, 9/1/13 $ 4,803,996 MXN 43,800,000 A-/Baa1 Mexican Bonos, 6.0%, 6/18/15 3,461,573 PEN 4,100,000 BBB+/Baa3 Peru Government Bond, 9.91%, 5/5/15 1,804,056 -------------------------------------------------------------------------------------------------------- TOTAL FOREIGN GOVERNMENT BONDS (Cost $10,060,401) $ 10,069,625 -------------------------------------------------------------------------------------------------------- SENIOR FLOATING RATE LOAN INTERESTS -- 0.3%** MATERIALS -- 0.1% Aluminum -- 0.1% 246,875 4.00 BB-/Ba2 Novelis, Inc. Georgia, Term Loan, 3/11/17 $ 247,378 ------------ Total Materials $ 247,378 -------------------------------------------------------------------------------------------------------- CAPITAL GOODS -- 0.1% Building Products -- 0.1% 247,696 4.00 BB-/B1 Armstrong World Industries, Inc., Term Loan B-1, 3/8/18 $ 248,316 ------------ Total Capital Goods $ 248,316 -------------------------------------------------------------------------------------------------------- HEALTH CARE EQUIPMENT & SERVICES -- 0.0% Health Care Services -- 0.0% 212,015 6.50 B/B1 Gentiva Health Services, Inc., Term B1 Term Loan, 2/22/16 $ 202,209 ------------ Total Health Care Equipment & Services $ 202,209 -------------------------------------------------------------------------------------------------------- SOFTWARE & SERVICES -- 0.0% Data Processing & Outsourced Services -- 0.0% 17,143 4.25 BBB/Ba1 Fidelity National Information Services, Inc., Term B Loan, 7/18/16 $ 17,250 ------------ Total Software & Services $ 17,250 -------------------------------------------------------------------------------------------------------- TECHNOLOGY HARDWARE & EQUIPMENT -- 0.1% Communications Equipment -- 0.1% 344,131 4.25 NR/NR CommScope, Inc., Tranche 1 Term Loan, 1/14/18 $ 345,202 ------------ Total Technology Hardware & Equipment $ 345,202 -------------------------------------------------------------------------------------------------------- TOTAL SENIOR FLOATING RATE LOAN INTERESTS (Cost $1,062,493) $ 1,060,355 -------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 26 Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Rate (b) Ratings Shares (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- EXCHANGE TRADED FUNDS -- 7.1% 181,300 ETFS Physical Palladium Shares* $ 12,221,435 53,000 ETFS Platinum Trust* 8,191,150 9,100 iShares MSCI Mexico Investable Market Index Fund 562,562 41,700 iShares MSCI Russia Capped Index Fund 999,674 17,800 iShares MSCI South Korea Index Fund 1,054,472 37,300 iShares MSCI Sweden Index Fund 1,056,709 154,900 PowerShares Buyback Achievers Portfolio 4,557,158 ------------ TOTAL EXCHANGE TRADED FUNDS (Cost $27,845,603) $ 28,643,160 ---------------------------------------------------------------------------------------------------- PURCHASED OPTIONS -- 0.0%+ 5,000 Financial Select Sector SPDR Fund, May 19 at $15 $ 70,000 2,200 iShares Barclays 20+ Year Treasury Bond Fund, May 19 at $114 81,400 ------------ $ 151,400 ---------------------------------------------------------------------------------------------------- TOTAL PURCHASED OPTIONS (Cost $555,822) $ 151,400 ---------------------------------------------------------------------------------------------------- Principal Amount ($) ---------------------------------------------------------------------------------------------------- TEMPORARY CASH INVESTMENTS -- 6.4% Repurchase Agreements -- 6.4% 26,070,000 NR/Aaa Deutschebank AG, 0.19%, dated 4/30/12, repurchase price of $26,070,000 plus accrued interest on 5/1/12 collateralized by the following: $1,628,895 U.S. Treasury Bond, 4.375 - 7.125%, 2/15/23 - 11/15/39 $1,639,558 U.S. Treasury Note, 2.75 - 3.875%, 12/31/17 - 5/15/18 $23,283,171 U.S. Treasury Strip, 0.0 - 9.0%, 8/15/12 - 11/15/41 $ 26,070,000 ------------ TOTAL TEMPORARY CASH INVESTMENTS (Cost $26,070,000) $ 26,070,000 ---------------------------------------------------------------------------------------------------- TOTAL INVESTMENT IN SECURITIES -- 96.6% (Cost $363,441,647) (a) $389,908,066 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 27 Schedule of Investments | 4/30/12 (Consolidated) (unaudited) (continued) ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- WRITTEN OPTIONS -- 0.0%+ (5,000) Financial Select Sector SPDR Fund, May 19 at $14 $ (15,000) (2,200) iShares Barclays 20+ Year Treasury Bond Fund, May 19 at $108 (12,100) ------------ $ (27,100) ---------------------------------------------------------------------------------------------------- TOTAL WRITTEN OPTIONS (Premiums received $167,932) $ (27,100) ---------------------------------------------------------------------------------------------------- OTHER ASSETS & LIABILITIES -- 3.4% $ 13,516,371 ---------------------------------------------------------------------------------------------------- TOTAL NET ASSETS -- 100.0% $403,397,337 ==================================================================================================== * Non-income producing security. + Amount rounds to less than 0.1%. REIT Real Estate Investment Trust NR Not rated by either S&P or Moody's. (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 April 30, 2012, the value of these securities amounted to $35,675,311 or 8.8% of total net assets. ** Senior floating rate loan interests in which the Fund invests generally pay interest at rates that are periodically redetermined by reference to a base lending rate plus a premium. These base lending rates are generally (i) the lending rate offered by one or more major European banks, such as LIBOR (London InterBank Offered Rate), (ii) the prime rate offered by one or more major United States banks, (iii) the certificate of deposit or (iv) other base lending rates used by commercial lenders. The rate shown is the coupon rate at period end. (a) At April 30, 2012, the net unrealized gain on investments based on cost for federal income tax purposes of $365,481,910 was as follows: Aggregate gross unrealized gain for all investments in which there is an excess of value over tax cost $28,432,470 Aggregate gross unrealized loss for all investments in which there is an excess of tax cost over value (4,006,314) ----------- Net unrealized gain $24,426,156 =========== (b) Debt obligation with a variable interest rate. Rate shown is rate at end of period. NOTE: Principal amounts are denominated in U.S. Dollars unless otherwise noted: CLP Chilean Peso EURO Euro MXN Mexican Peso PEN Peruvian Nuevo The accompanying notes are an integral part of these financial statements. 28 Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 Purchases and sales of securities (excluding temporary cash investments) for the six months ended April 30, 2012 aggregated $362,639,090 and $279,518,945, 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.) Level 3 -- significant unobservable inputs (including the Fund's own assumptions in determining fair value of investments) Generally, equity securities are categorized as Level 1, fixed income securities and senior loans as Level 2 and securities valued using fair value methods (other than prices supplied by independent pricing services) are categorized as Level 3. See Notes to Financial Statements -- Note 1A. The following is a summary of the inputs used as of April 30, 2012, in valuing the Fund's assets: ------------------------------------------------------------------------------------------------------- Level 1 Level 2 Level 3 Total ------------------------------------------------------------------------------------------------------- Convertible Corporate Bonds $ -- $ 4,903,762 $ -- $ 4,903,762 Common Stocks 72,093,679 178,778,837 -- 250,872,516 Corporate Bonds -- 68,137,248 -- 68,137,248 Foreign Government Bonds -- 10,069,625 -- 10,069,625 Senior Floating Rate Loan Interests -- 1,060,355 -- 1,060,355 Exchange Traded Funds 28,643,160 -- -- 28,643,160 Purchased Options 151,400 -- -- 151,400 Repurchase Agreements -- 26,070,000 -- 26,070,000 ------------------------------------------------------------------------------------------------------- Total $100,888,239 $289,019,827 $ -- $389,908,066 ======================================================================================================= Other Financial Instruments* $ (645,301) $ (301,093) $ -- $ (946,395) ======================================================================================================= * Other financial instruments include futures, forwards and written options contracts. The accompanying notes are an integral part of these financial statements. Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 29 Statement of Assets and Liabilities | 4/30/12 (Consolidated) (unaudited) ASSETS: Investment in securities, at value (cost $363,441,647) $389,908,066 Cash 14,327,369 Foreign currencies, at value (cost $2,864,784) 2,865,146 Receivables -- Investment securities sold 3,446,219 Fund shares sold 4,966,142 Dividends and interest 2,361,303 Due from Pioneer Investment Management, Inc. 84,117 Other 253,248 -------------------------------------------------------------------------------------- Total assets $418,211,610 -------------------------------------------------------------------------------------- LIABILITIES: Payables -- Investment securities purchased $ 7,256,425 Fund shares repurchased 6,335,375 Forward foreign currency portfolio hedge contracts, open-net 301,093 Open options contracts written (premiums received $167,932) 27,100 Unrealized loss on futures contracts 709,551 Due to affiliates 94,106 Accrued expenses 90,623 -------------------------------------------------------------------------------------- Total liabilities $ 14,814,273 -------------------------------------------------------------------------------------- NET ASSETS: Paid-in capital $379,959,958 Undistributed net investment income 1,888,162 Accumulated net realized loss on investments and foreign currency transactions (4,037,946) Net unrealized gain on investments 26,466,419 Net unrealized loss on forward foreign currency contracts and other assets and liabilities denominated in foreign currencies (319,537) Net unrealized gain on written options 149,832 Net unrealized loss on futures contracts (709,551) -------------------------------------------------------------------------------------- Total net assets $403,397,337 ====================================================================================== NET ASSET VALUE PER SHARE: (No par value, unlimited number of shares authorized) Class A (based on $133,506,247/11,514,105 shares) $ 11.60 Class C (based on $90,557,880/7,862,791 shares) $ 11.52 Class Y (based on $179,333,210/15,436,259 shares) $ 11.62 MAXIMUM OFFERING PRICE: Class A ($11.60 [divided by] 95.5%) $ 12.15 ====================================================================================== The accompanying notes are an integral part of these financial statements. 30 Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 Statement of Operations (Consolidated) (unaudited) For the Six Months Ended 4/30/12 INVESTMENT INCOME: Dividends (net of foreign taxes withheld of $171,885) $ 3,419,199 Interest (net of foreign taxes withheld of $101,318) 2,309,945 Income from securities loaned, net 17,556 --------------------------------------------------------------------------------------------- Total investment income $ 5,746,700 --------------------------------------------------------------------------------------------- EXPENSES: Management fees $ 1,083,594 Transfer agent fees Class A 30,247 Class C 11,975 Class Y 1,750 Distribution fees Class A 131,559 Class C 364,852 Shareholder communications expense 137,767 Administrative reimbursement 44,480 Custodian fees 96,257 Registration fees 45,698 Professional fees 26,969 Printing expense 28,438 Fees and expenses of nonaffiliated Trustees 4,065 Miscellaneous 30,590 --------------------------------------------------------------------------------------------- Total expenses $ 2,038,241 Less fees waived and expenses reimbursed by Pioneer Investment Management, Inc. (135,589) --------------------------------------------------------------------------------------------- Net expenses $ 1,902,652 --------------------------------------------------------------------------------------------- Net investment income $ 3,844,048 --------------------------------------------------------------------------------------------- REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS, FUTURES CONTRACTS AND FOREIGN CURRENCY TRANSACTIONS: Net realized gain (loss) on: Investments $ (252,623) Futures contracts (91,491) Forward foreign currency contracts and other assets and liabilities denominated in foreign currencies (1,163,949) $(1,508,063) --------------------------------------------------------------------------------------------- Change in net unrealized gain (loss) on: Investments $16,868,861 Futures contracts (709,551) Written options 149,832 Forward foreign currency contracts and other assets and liabilities denominated in foreign currencies (104,963) $16,204,179 --------------------------------------------------------------------------------------------- Net gain on investments and foreign currency transactions $14,696,116 --------------------------------------------------------------------------------------------- Net increase in net assets resulting from operations $18,540,164 ============================================================================================= The accompanying notes are an integral part of these financial statements. Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 31 Statement of Changes in Net Assets (Consolidated) -------------------------------------------------------------------------------------------------- Six Months Ended 4/30/12 Year Ended (unaudited) 10/31/11 -------------------------------------------------------------------------------------------------- FROM OPERATIONS: Net investment income $ 3,844,048 $ 3,197,834 Net realized loss on investments, futures contracts and foreign currency transactions (1,508,063) 88,205 Change in net unrealized gain on investments and foreign currency transactions 16,204,179 6,605,054 -------------------------------------------------------------------------------------------------- Net increase in net assets resulting from operations $ 18,540,164 $ 9,891,093 -------------------------------------------------------------------------------------------------- DISTRIBUTIONS TO SHAREOWNERS: Net investment income: Class A ($0.27 and $0.08 per share, respectively) $ (2,439,674) $ (413,621) Class C ($0.21 and $0.05 per share, respectively) (1,235,595) (137,785) Class Y ($0.31 and $0.09 per share, respectively) (3,869,953) (274,466) -------------------------------------------------------------------------------------------------- Total distributions to shareowners $ (7,545,222) $ (825,872) -------------------------------------------------------------------------------------------------- FROM FUND SHARE TRANSACTIONS: Net proceeds from sale of shares $178,882,857 $276,104,863 Reinvestment of distributions 6,364,485 555,232 Cost of shares repurchased (58,376,102) (102,595,276) -------------------------------------------------------------------------------------------------- Net increase in net assets resulting from Fund share transactions $126,871,240 $174,064,819 -------------------------------------------------------------------------------------------------- Net increase in net assets $137,866,182 $183,130,040 NET ASSETS: Beginning of period 265,531,155 82,401,115 -------------------------------------------------------------------------------------------------- End of period $403,397,337 $265,531,155 -------------------------------------------------------------------------------------------------- Undistributed net investment income $ 1,888,162 $ 5,589,336 -------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 32 Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 ----------------------------------------------------------------------------------------------------- '12 Shares '12 Amount '11 Shares '11 Amount (unaudited) (unaudited) ----------------------------------------------------------------------------------------------------- Class A Shares sold 5,457,426 $62,100,103 8,959,305 $ 97,639,364 Reinvestment of distributions 201,928 2,176,787 30,367 321938 Less shares repurchased (1,906,580) (21,548,126) (5,138,815) (56,124,284) ----------------------------------------------------------------------------------------------------- Net increase 3,752,774 $42,728,764 3,850,856 $ 41,837,018 ===================================================================================================== Class C Shares sold 3,388,613 $37,983,081 4,748,584 $ 51,465,394 Reinvestment of distributions 91,753 978,868 6,749 71420 Less shares repurchased (861,019) (9,602,972) (1,489,322) (15,887,460) ----------------------------------------------------------------------------------------------------- Net increase 2,619,347 $29,358,977 3,266,012 $ 35,649,354 ===================================================================================================== Class Y Shares sold 6,951,962 $78,799,477 11,548,481 $127,000,105 Reinvestment of distributions 296,884 3,208,830 15,257 161873 Less shares repurchased (2,417,653) (27,225,004) (2,824,439) (30,583,531) ----------------------------------------------------------------------------------------------------- Net increase 4,831,193 $54,783,303 8,739,298 $ 96,578,447 ===================================================================================================== The accompanying notes are an integral part of these financial statements. Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 33 Financial Highlights (Consolidated) -------------------------------------------------------------------------------------------------------- Six Months 5/3/10 Ended Year (Commencement 4/30/12 Ended of Operations) to (unaudited) 10/31/11 10/31/10 (a) -------------------------------------------------------------------------------------------------------- Class A Net asset value, beginning of period $ 11.25 $ 10.63 $10.00(b) -------------------------------------------------------------------------------------------------------- Increase from investment operations: Net investment income $ 0.09 $ 0.19 $ 0.03 Net realized and unrealized gain on investments, futures contracts and foreign currency transactions 0.53 0.51 0.60 -------------------------------------------------------------------------------------------------------- Net increase in net assets from investment operations $ 0.62 $ 0.70 $ 0.63 Distributions to shareowners: Net investment income (0.27) (0.08) -- -------------------------------------------------------------------------------------------------------- Net increase in net asset value $ 0.35 $ 0.62 $ 0.63 -------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 11.60 $ 11.25 $10.63 ======================================================================================================== Total return* 5.74%*** 6.60% 6.30%*** Ratio of net expenses to average net assets+ 1.20%** 1.20% 1.20%** Ratio of net investment income to average net assets+ 2.34%** 2.05% 1.44%** Portfolio turnover rate 190%*** 191% 8%*** Net assets, end of period (in thousands) $133,506 $87,316 $41,574 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Net expenses 1.31%** 1.24% 1.94%** Net investment income 2.23%** 2.01% 0.69%** Ratios with waiver of fees and assumption of expenses by the Adviser and reduction for fees paid indirectly: Net expenses 1.20%** 1.20% 1.20%** Net investment income 2.34%** 2.05% 1.44%** ======================================================================================================== (a) Class A shares were first publicly offered on May 3, 2010. (b) Class A shares beginning capital was recorded on inception date at $10.00 per share. * 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. + Ratios with no reduction for fees paid indirectly. The accompanying notes are an integral part of these financial statements. 34 Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 -------------------------------------------------------------------------------------------------------- Six Months 5/3/10 Ended Year (Commencement 4/30/12 Ended of Operations) to (unaudited) 10/31/11 10/31/10 (a) -------------------------------------------------------------------------------------------------------- Class C Net asset value, beginning of period $ 11.15 $ 10.60 $ 10.00(b) -------------------------------------------------------------------------------------------------------- Increase from investment operations: Net investment income $ 0.04 $ 0.08 $ 0.02 Net realized and unrealized gain on investments, futures contracts and foreign currency transactions 0.54 0.52 0.58 -------------------------------------------------------------------------------------------------------- Net increase in net assets from investment operations $ 0.58 $ 0.60 $ 0.60 Distributions to shareowners: Net investment income (0.21) (0.05) -- -------------------------------------------------------------------------------------------------------- Net increase in net asset value $ 0.37 $ 0.55 $ 0.60 -------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 11.52 $ 11.15 $ 10.60 ======================================================================================================== Total return* 5.31%*** 5.69% 6.00%*** Ratio of net expenses to average net assets+ 1.99%** 2.00% 2.00%** Ratio of net investment income to average net assets+ 1.53%** 1.25% 0.67%** Portfolio turnover rate 190%*** 191% 8%*** Net assets, end of period (in thousands) $90,558 $58,471 $20,953 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Net expenses 2.03%** 2.00% 2.50%** Net investment income 1.49%** 1.25% 0.17%** Ratios with waiver of fees and assumption of expenses by the Adviser and reduction for fees paid indirectly: Net expenses 1.99%** 2.00% 2.00%** Net investment income 1.53%** 1.25% 0.67%** ======================================================================================================== (a) Class C shares were first publicly offered on May 3, 2010. (b) Class C shares beginning capital was recorded on inception date at $10.00 per share. * 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. + Ratios with no reduction for fees paid indirectly. The accompanying notes are an integral part of these financial statements. Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 35 Financial Highlights (Consolidated) (continued) -------------------------------------------------------------------------------------------------------- Six Months 5/3/10 Ended Year (Commencement 4/30/12 Ended of Operations) to (unaudited) 10/31/11 10/31/10 (a) -------------------------------------------------------------------------------------------------------- Class Y Net asset value, beginning of period $ 11.29 $ 10.65 $ 10.00(b) -------------------------------------------------------------------------------------------------------- Increase from investment operations: Net investment income $ 0.11 $ 0.15 $ 0.05 Net realized and unrealized gain on investments, futures contracts and foreign currency transactions 0.53 0.58 0.60 -------------------------------------------------------------------------------------------------------- Net increase in net assets from investment operations $ 0.64 $ 0.73 $ 0.65 Distributions to shareowners: Net investment income (0.31) (0.09) -- -------------------------------------------------------------------------------------------------------- Net increase in net asset value $ 0.33 $ 0.64 $ 0.65 -------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 11.62 $ 11.29 $ 10.65 ======================================================================================================== Total return* 5.88%*** 6.89% 6.50%*** Ratio of net expenses to average net assets+ 0.90%** 0.90% 0.90%** Ratio of net investment income to average net assets+ 2.62%** 2.35% 1.78%** Portfolio turnover rate 190%*** 191% 8%*** Net assets, end of period (in thousands) $179,333 $119,744 $19,875 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Net expenses 0.99%** 0.98% 1.41%** Net investment income 2.53%** 2.67% 1.26%** Ratios with waiver of fees and assumption of expenses by the Adviser and reduction for fees paid indirectly: Net expenses 0.90%** 0.90% 0.90%** Net investment income 2.62%** 2.35% 1.78%** ======================================================================================================== (a) Class Y shares were first publicly offered on May 3, 2010. (b) Class Y shares beginning capital was recorded on inception date at $10.00 per share. * 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. + Ratios with no reduction for fees paid indirectly. The accompanying notes are an integral part of these financial statements. 36 Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 Notes to Financial Statements | 4/30/12 (Consolidated) (unaudited) 1. Organization and Significant Accounting Policies Pioneer Multi-Asset Real Return Fund (the Fund) is one of two portfolios comprising Pioneer Series Trust VI, 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 were first publicly offered on May 3, 2010. 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, which are consistent with those policies generally accepted in the investment company industry: A. Security Valuation Security transactions are recorded as of trade date. 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. Senior Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 37 floating rate loan interests (senior loans) are valued in accordance with guidelines established by the Board of Trustees at the mean between the last available bid and asked prices from one or more brokers or dealers as obtained from Loan Pricing Corporation. Senior loans for which no reliable price quotes are available will be valued by Loan Pricing Corporation through the use of pricing matrices to determine valuations. Fixed income securities with remaining maturity of more than sixty days are valued at 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. Valuations may be supplemented by dealers and other sources, as required. Equity securities that have traded on an exchange are valued at 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. Short-term fixed income securities with remaining maturities of sixty days or less generally are valued at amortized cost. Money market mutual funds are valued at net asset value. Trading in foreign 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. Securities or loans 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 using fair value methods pursuant to procedures adopted by the Board of Trustees. 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 from exchange prices. At April 30, 2012, no securities were valued using fair value methods (other than securities valued using prices supplied by independent pricing services). 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. 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 debt securities are accreted/ 38 Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 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. All discounts/premiums on debt securities are accreted/ amortized into interest income for financial reporting purposes. Gains and losses on sales of investments are calculated on the identified cost method for both financial reporting and federal income tax purposes. B. 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 market price of those securities but are included with the net realized and unrealized gain or loss on investments. C. Futures Contracts The Fund may enter into futures transactions 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. 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 gains or losses. 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. Futures contracts are subject to market risk, interest rate risk and currency exchange rate risk. 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. Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 39 With futures, there is minimal counterparty credit risk to the Fund since futures are exchange-traded and the exchange's clearinghouse, as counterparty to all exchange-traded futures, guarantees the futures against default. The average number of contracts open during the six months ended April 30, 2012 was 433. At April 30, 2012, open futures contracts were as follows: -------------------------------------------------------------------------------------------- Number of Unrealized Contracts Settlement Appreciation/ Type Long/(Short) Month Value (Depreciation) -------------------------------------------------------------------------------------------- CBOE VIX Future 702 5/12 $ 12,951,900 $(1,035,080) CBOE VIX Future (537) 10/12 (13,639,800) 546,995 U.S. Ultra Bond Future 47 6/12 7,417,188 46,459 CAC40 10 Euro Future (169) 5/12 (7,069,939) 73,458 Stoxx 600 Bank Future (860) 6/12 (7,735,014) (250,033) -------------------------------------------------------------------------------------------- $ (8,075,665) $ (618,201) ============================================================================================ D. 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 gains or losses are recorded in the Fund's financial statements. The Fund records realized gains and losses at the time a portfolio hedge 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 6). E. 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 federal income tax provision is required. Tax years remain subject to examination by federal and state tax authorities. The amounts and characterizations of distributions to shareowners for financial reporting purposes are determined in accordance with federal income tax rules. Therefore, the sources of the Fund's distributions may be shown in the accompanying financial statements as from or in excess of net investment income or as from net realized gain on investment transactions, or as from paid-in capital, depending on the type of book/tax differences that may exist. 40 Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 The tax character of current year distributions payable will be determined at the end of the Fund's taxable year. The tax character of distributions paid during the year ended October 31, 2011 was as follows: -------------------------------------------------------------------------------- 2011 -------------------------------------------------------------------------------- Distributions paid from: Ordinary income $825,872 Long-term capital gain -- -------------------------------------------------------------------------------- Total $825,872 ================================================================================ The following shows the components of distributable earnings on a federal income tax basis at October 31, 2011: -------------------------------------------------------------------------------- 2011 -------------------------------------------------------------------------------- Distributable earnings: Undistributed ordinary income $ 5,472,632 Capital loss carryforward (541,921) Unrealized appreciation 7,511,726 -------------------------------------------------------------------------------- Total $12,442,437 ================================================================================ The difference between book-basis and tax-basis unrealized appreciation is attributable to the tax deferral of losses on wash-sales, the tax treatment on passive foreign investment company (PFIC) holdings, adjustments relating to catastrophe bonds and the mark-to-market of forward currency and future contracts. F. 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 $38,998 in underwriting commissions on the sale of Class A shares during the six months ended April 30, 2012. G. 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 transfer agent, Pioneer Investment Management Shareholder Services, Inc. (PIMSS), for its services are allocated among the classes of Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 41 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 and Class Y shares can reflect different transfer agent and distribution expense rates. H. 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. The Fund may gain exposure to commodities (such as oil and precious metals) through investment in commodity-related investments, including commodity-linked derivatives, ETFs and leveraged or unleveraged commodity-linked notes (derivative debt instruments with principal and/or coupon payments linked to the performance of commodity indices). The Fund also may invest in equity securities of issuers in commodity-related industries. The Fund's investments in commodity-related investments may subject the Fund to greater market price volatility than investments in traditional securities. The value of commodity-related investments may be affected by changes in overall market movements, commodity index volatility, changes in interest rates, or factors affecting particular industries or commodities, such as weather, disease, embargoes, acts of war or terrorism, or political and regulatory developments. Commodity-related investments may be more volatile than the underlying commodities. In addition, commodity-linked investments are subject to counterparty risk due to there being a relatively small number of issuers. The Fund intends to gain exposure to commodity-related investments by investing in the Pioneer Cayman Commodity Fund, Ltd. (the Subsidiary), a foreign entity that will be treated as a controlled foreign corporation for U.S. federal income tax purposes. The Fund may invest up to 25% of its total assets in the Subsidiary. The Fund's ability to invest in commodity-related investments, and the means through which any such investments may be made, will be limited by tax considerations. The Fund may invest in REIT securities, the value of which can fall for a variety of reasons, such as declines in rental income, fluctuating interest 42 Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 rates, poor property management, environmental liabilities, uninsured damage, increased competition, or changes in real estate tax laws. I. Repurchase Agreements With respect to repurchase agreements entered into by the Fund, the value of the underlying securities (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, Pioneer Investment Management, Inc. (PIM), is responsible for determining that the value of the collateral remains at least equal to the repurchase price. J. Securities Lending The Fund may lend securities in its portfolio to certain broker-dealers or other institutional investors. When entering into a securities loan transaction, the Fund typically receives cash collateral from the borrower equal to at least the value of the securities loaned, which is invested in temporary investments. Credit Suisse AG, New York Branch, as the Fund's securities lending agent, manages the Fund's securities lending collateral. The income earned on the investment of collateral is shared with the borrower and the lending agent in payment of any rebate due to the borrower with respect to the securities loan, and in compensation for the lending agent's services to the Fund. The Fund also continues to receive payments in lieu of dividends or interest on the securities loaned. Gain or loss on the value of the loaned securities that may occur during the term of the loan will be for the account of the Fund. The amount of the collateral is required to be adjusted daily to reflect any price fluctuation in the value of the loaned securities. If the required market value of the collateral is less than the value of the loaned securities, the borrower is required to deliver additional collateral for the account of the Fund prior to the close of business on that day. The Fund has the right, under the lending agreement, to terminate the loan and recover the securities from the borrower with prior notice. The Fund is required to return the cash collateral to the borrower and could suffer a loss if the value of the collateral, as invested, has declined. At April 30, 2012, there were no securities on loan. K. Option Writing The Fund may buy and sell put and call options, or write put and covered call options on portfolio securities in order to produce incremental earning or protect against changes in the value of portfolio securities. The Fund generally purchases put options or writes covered call options to hedge against adverse movements in the value of portfolio holdings. When an option is written, the Fund receives a premium and becomes obligated Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 43 to sell or purchase 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. Transactions in written call options for the six months ended April 30, 2012 are summarized as follows: ------------------------------------------------------------------------------------------ Number of contracts Premiums received ------------------------------------------------------------------------------------------ Options outstanding at beginning of year -- $ -- Options opened 3,011,533 4,173,829 Options exercised (1,538) (28,175) Options closed (3,000,000) (3,944,061) Options expired (2,795) (33,661) ------------------------------------------------------------------------------------------ Options outstanding at end of year 7,200 $167,932 ========================================================================================== 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 0.70% of the average daily net assets of the Fund, excluding assets invested in the Subsidiary and on which the Subsidiary pays a management fee. The Subsidiary has entered into a separate management contract with PIM, pursuant to which PIM manages the assets of the Subsidiary. As compensation for its management services to the Subsidiary and expenses incurred with respect to the Subsidiary, the Subsidiary pays PIM a fee at the annual rate of 0.70% of the Subsidiary's average daily net assets. PIM has contractually agreed to limit ordinary operating expenses to the extent required to reduce Fund expenses to 1.20%, 2.10% and 0.90% of the average daily net assets attributable to Class A, Class C and Class Y shares, respectively. These expense limitations are in effect through March 1, 2013. Fees waived and expenses reimbursed during the six months ended April 30, 2012 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 44 Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 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 $42,640 in management fees, administrative costs and certain other reimbursements payable to PIM at April 30, 2012. 3. Transfer Agent PIMSS, a wholly owned indirect subsidiary of UniCredit, provides substantially all transfer agent and shareowner services to the Fund at negotiated rates. In addition, the Fund reimburses PIMSS for out-of-pocket expenses incurred by PIMSS related to shareholder communications activities such as proxy and statement mailings, outgoing phone calls and omnibus relationship contracts. For the six months ended April 30, 2012, such out-of-pocket expenses by class of shares were as follows: -------------------------------------------------------------------------------- Shareholder Communications: -------------------------------------------------------------------------------- Class A $47,975 Class C 33,317 Class Y 56,475 -------------------------------------------------------------------------------- Total: $137,767 ================================================================================ Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $37,923 in transfer agent fees and out-of-pocket reimbursements payable to PIMSS at April 30, 2012. 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 $13,543 in distribution fees payable to PFD at April 30, 2012. 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 Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 45 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 one year 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 CDSCs are paid to PFD. For the six months ended April 30, 2012, CDSCs in the amount of $16,549 were paid to PFD. 5. Basis for Consolidation for the Pioneer Multi-Asset Real Return Fund The consolidated financial statements of the Fund include the accounts of the Subsidiary. All intercompany accounts and transactions have been eliminated. The Subsidiary, a Cayman Islands exempted company, was incorporated on February 10, 2010 and is wholly-owned and controlled by the Fund. The Fund is the sole shareholder of the Subsidiary. It is intended that the Fund will remain the sole shareholder and will continue to control the Subsidiary. The Fund and the Subsidiary are both managed by PIM. The Subsidiary acts as an investment vehicle for the Fund in order to effect certain investments on behalf of the Fund. As of April 30, 2012, the Subsidiary represented approximately $20,412,585 or approximately 5.1% of the net assets of the Fund. 6. Forward Foreign Currency Contracts At April 30, 2012, 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 number of contracts open during the six months ended April 30, 2012 was 861,449,422. Open portfolio hedges at April 30, 2012 were as follows: --------------------------------------------------------------------------------------------------------- Net Net Contracts to In Exchange Settlement Unrealized Currency Deliver For USD Date Value Gain (Loss) --------------------------------------------------------------------------------------------------------- EUR (Euro) 15,000,000 $ 19,763,670 5/2/12 $ 19,854,743 $ 91,073 EUR (Euro) (27,000,000) (35,972,181) 5/2/12 (35,738,537) 233,644 GBP (British Pound) (5,000,000) (7,941,335) 5/1/12 (8,116,501) (175,166) JPY (Japanese Yen) 96,519,476 1,200,192 5/7/12 1,209,333 9,141 JPY (Japanese Yen) (1,250,000,000) (15,111,383) 5/1/12 (15,661,217) (549,834) JPY (Japanese Yen) 625,000,000 7,741,827 5/1/12 7,830,608 88,781 ZAR (South African Rand) 1,879,088 240,072 5/2/12 241,519 1,447 ZAR (South African Rand) 2,747,388 353,248 5/3/12 353,069 (179) --------------------------------------------------------------------------------------------------------- Total $(301,093) ========================================================================================================= At April 30, 2012, the Fund had no outstanding settlement hedges. 46 Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 7. Expense Offset Arrangements The Fund has entered into certain expense offset arrangements with PIMSS which may result in a reduction in the Fund's total expenses due to interest earned on cash held by PIMSS. For the six months ended April 30, 2012, the Fund's expenses were not reduced under such arrangements. 8. 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 January 20, 2012 was in the amount of $165 million. Under such facility, interest on borrowings was payable at the higher of the London Interbank Offered Rate (LIBOR) on the borrowing date plus 1.25% on an annualized basis or the Federal Funds Rate on the borrowing date plus 1.25% on an annualized basis. The credit facility in effect as of February 15, 2012 is in the amount of $215 million. Under such facility, depending on the type of loan, interest on borrowings is payable at LIBOR plus 0.90% 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 Euro dollar 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 April 30, 2012, the Fund had no borrowings under a credit facility. 9. Additional Disclosures about Derivative Instruments and Hedging Activities: Values of derivative instruments as of April 30, 2012 were as follows: ---------------------------------------------------------------------------------------------- Derivatives Not Accounted for as Hedging Instruments Asset Derivatives 2012 Liabilities Derivatives 2012 Under Accounting -------------------------------------------------------------- Standards Codification Balance Sheet Balance Sheet (ASC) 815 Location Value Location Value ---------------------------------------------------------------------------------------------- Foreign Exchange Contracts* Receivables $ -- Payables $ 301,093 Index Futures Receivables -- Payables 709,551 Written options Receivables -- Payables 27,100 ---------------------------------------------------------------------------------------------- Total $ -- $1,037,744 ============================================================================================== * Foreign exchange contracts are shown as a net payable on the Statement of Assets and Liabilities. Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 47 The effect of derivative instruments on the Statement of Operations for the six months ended April 30, 2012 was as follows: ----------------------------------------------------------------------------------------------------------- Derivatives Not Change in Accounted for as Realized Unrealized Hedging Instruments Loss on Gain or (Loss) Under Accounting Location of Gain or (Loss) Derivatives on Derivatives Standards Codification on Derivatives Recognized Recognized Recognized (ASC) 815 in Income in Income in Income ----------------------------------------------------------------------------------------------------------- Index Futures Net realized loss on futures contracts $ (91,491) Index Futures Change in unrealized gain (loss) on (709,551) futures contracts Foreign Exchange Contracts Net realized gain (loss) on forward (1,163,949) foreign currency contracts and other assets and liabilities denominated in foreign currencies Foreign Exchange Contracts Change in unrealized gain (loss) on (132,088) forward foreign currency contracts and other assets and liabilities denominated in foreign currencies 48 Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 Approval of Investment Advisory Agreement Pioneer Investment Management, Inc. (PIM) serves as the investment adviser to Pioneer Multi-Asset Real Return 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 March 2011 as the Trustees of the Fund agreed on, among other things, an overall approach and timeline for the process. In July 2011, the Trustees approved the format of the contract review materials and submitted their formal request to PIM to furnish information necessary to evaluate the terms of the investment advisory agreement. The contract review materials were provided to the Trustees in July 2011 and September 2011. After reviewing and discussing the materials, the Trustees submitted a request for additional information to PIM, and materials were provided in response to this request. Meetings of the Independent Trustees of the Fund were held in July, September, October, and November, 2011 to review and discuss the contract review materials. In addition, the Trustees took into account the information related to the Fund provided to the Trustees at each regularly scheduled meeting. At a meeting held on November 29, 2011, 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 considering 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. PIM also serves as the investment adviser to Pioneer Cayman Commodity Fund, Ltd. (the Subsidiary), a wholly-owned subsidiary of the Fund organized under the laws of the Cayman Islands. The Trustees, including the independent Trustees voting separately, unanimously approved the renewal of the investment advisory agreement for the Subsidiary (the Subsidiary Management Agreement) for another year. The factors considered by the Trustees in approving the renewal of the Subsidiary Management Agreement were substantially the same as the factors described below with respect to the investment advisory agreement for the Fund. Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 49 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 reviewed the terms of the investment advisory agreement. The Trustees also reviewed PIM's investment approach for the Fund, its research process and its process for trade execution. The Trustees considered the resources of PIM and the personnel of PIM who provide investment management services to 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 also considered the substantial attention and high priority given by PIM's senior management to the Pioneer fund complex. In addition, the Trustees considered PIM's plans to increase resources in its investment management function and other enhancements to PIM's advisory capabilities. 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 The Trustees considered the performance results of the Fund over various time periods. They reviewed information comparing the Fund's performance with the performance of its peer group of funds as classified by Morningstar, Inc. (Morningstar), an independent provider of investment company data, and with the performance of the Fund's benchmark index. The Trustees considered that the Fund's annualized total return was in the fifth quintile of its Morningstar category for the one year period ended June 30, 2011. (In all quintile rankings referred to throughout this disclosure, first quintile is most favorable to the Fund's shareowners. Thus, highest relative performance would be first quintile and lowest relative expenses would also be first quintile.) The Trustees discussed the Fund's underperformance, and considered that the Fund only commenced operations on May 30, 2010. The Trustees indicated that they were satisfied with the information presented with respect to the Fund's performance. 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 50 Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 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 Trust Research and Consulting, LLC (Strategic Insight), an independent third party. The Trustees considered that the Fund's management fee for the twelve months ended June 30, 2011 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 noted that although assets invested by the Fund in the Subsidiary are excluded from the calculation of the Fund's management fee, the Fund indirectly pays a management fee with respect to assets invested in the Subsidiary because the Subsidiary pays a management fee pursuant to the Subsidiary Management Agreement. The Trustees noted that the Subsidiary pays PIM a management fee at the same rate that the Fund pays PIM. The Trustees considered that the Fund's expense ratio for the twelve months ended June 30, 2011 was in the first quintile relative to its Strategic Insight peer group for the comparable period. The Trustees reviewed gross and net management fees charged by PIM to its institutional and other clients, including publicly offered European funds, 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 to its other clients and considered the differences in management fees and profit margins for PIM's Fund and non-Fund services. In evaluating the fees associated with PIM'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 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. 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 Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 51 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, rarely identifiable on a Fund-by-Fund basis, 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 Funds. 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 particularly, for example during the recent difficult periods for financial markets, as the level of services was maintained notwithstanding a significant decline in PIM's fee revenues from the Funds. Accordingly, the Trustees concluded that economies of scale, if any, were being appropriately shared with the Fund. 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. The Trustees considered the intangible benefits to PIM by virtue of its relationship with the Fund and the other Pioneer funds. The Trustees concluded that the receipt of these benefits was reasonable in the context of the overall relationship between PIM and the Fund. 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. 52 Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 Trustees, Officers and Service Providers Trustees John F. Cogan, Jr., Chairman David R. Bock Mary K. Bush Benjamin M. Friedman Margaret B.W. Graham Daniel K. Kingsbury Thomas J. Perna Marguerite A. Piret Stephen K. West Officers John F. Cogan, Jr., President Daniel K. Kingsbury, Executive Vice President Mark E. Bradley, Treasurer Christopher J. Kelley, Secretary Investment Adviser and Administrator Pioneer Investment Management, Inc. Custodian Brown Brothers Harriman & Co. Principal Underwriter Pioneer Funds Distributor, Inc. Legal Counsel Bingham McCutchen LLP Shareowner Services and Transfer Agent Pioneer Investment Management Shareholder 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 http://www.sec.gov. Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 53 This page for your notes. 54 Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 This page for your notes. Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 55 This page for your notes. 56 Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 This page for your notes. Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 57 This page for your notes. 58 Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 This page for your notes. Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 59 This page for your notes. 60 Pioneer Multi-Asset Real Return Fund | Semiannual Report | 4/30/12 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: -------------------------------------------------------------------------------- PIMSS, Inc. 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. 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 10(a), 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 accountant's 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 registrant's accountant for services rendered to the registrant, and rendered to the registrant's 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 registrant's audit committee of the board of trustees has considered whether the provision of non-audit services that were rendered to the registrant's 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 registrants 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 I Investments in securities of unaffiliated issuers as of the close of the reporting period as set forth in 210.12- 12 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 registrants portfolio (Portfolio Manager). Also state each Portfolio Managers 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 registrants equity securities that is registered by the registrant pursuant to Section 12 of the Exchange Act (15 U.S.C. 781). Instruction to paragraph (a). Disclose all purchases covered by this Item, including purchases that do not satisfy the conditions of the safe harbor of Rule 10b-18 under the Exchange Act (17 CFR 240.10b-18), made in the period covered by the report. Provide disclosures covering repurchases made on a monthly basis. For example, if the reporting period began on January 16 and ended on July 15, the chart would show repurchases for the months from January 16 through February 15, February 16 through March 15, March 16 through April 15, April 16 through May 15, May 16 through June 15, and June 16 through July 15. 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 registrants board of directors, where those changes were implemented after the registrant last provided disclosure in response to the requirements of Item 7(d)(2)(ii)(G) 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 registrants board of directors since the registrant last provided disclosure in response to the requirements of Item 7(d)(2)(ii)(G) 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 officer or officers and principal financial officer or officers, or persons performing similar functions, about the effectiveness of the registrant's disclosure controls and procedures (as defined in Rule 30a-2(c) under the Act (17 CFR 270.30a-2(c))) based on their evaluation of these controls and procedures as of a date within 90 days of the filing date of the report that includes the disclosure required by this paragraph. The registrant's principal executive officer and principal financial officer have concluded that the registrant's disclosure controls and procedures are effective based on their evaluation of these controls and procedures as of a date within 90 days of the filing date of this report. (b) Disclose whether or not there were significant changes in the registrant's internal controls or in other factors that could significantly affect these controls subsequent to the date of their evaluation, including any corrective actions with regard to significant deficiencies and material weaknesses. 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. File the exhibits listed below as part of this Form. Letter or number the exhibits in the sequence indicated. (a) 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. (b) A separate certification for each principal executive officer and principal financial officer of the registrant as required by Rule 30a-2 under the Act (17 CFR 270.30a-2). 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 VI By (Signature and Title)* /s/ John F. Cogan, Jr. John F. Cogan, Jr, President Date June 29, 2012 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/ John F. Cogan, Jr. John F. Cogan, Jr., President Date June 29, 2012 By (Signature and Title)* /s/ Mark Bradley Mark Bradley, Treasurer & Chief Accounting & Financial Officer Date June 29, 2012 * Print the name and title of each signing officer under his or her signature.