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 811-02864 Pioneer Bond Fund (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: June 30 Date of reporting period: July 1, 2016 through June 30, 2017 Form N-CSR is to be used by management investment companies to file reports with the Commission not later than 10 days after the transmission to stockholders of any report that is required to be transmitted to stockholders under Rule 30e-1 under the Investment Company Act of 1940 (17 CFR 270.30e-1). The Commission may use the information provided on Form N-CSR in its regulatory, disclosure review, inspection, and policymaking roles. A registrant is required to disclose the information specified by Form N-CSR, and the Commission will make this information public. A registrant is not required to respond to the collection of information contained in Form N-CSR unless the Form displays a currently valid Office of Management and Budget ("OMB") control number. Please direct comments concerning the accuracy of the information collection burden estimate and any suggestions for reducing the burden to Secretary, Securities and Exchange Commission, 450 Fifth Street, NW, Washington, DC 20549-0609. The OMB has reviewed this collection of information under the clearance requirements of 44 U.S.C. ss. 3507. ITEM 1. REPORTS TO STOCKHOLDERS. Pioneer Bond Fund -------------------------------------------------------------------------------- Annual Report | June 30, 2017 -------------------------------------------------------------------------------- Ticker Symbols: Class A PIOBX Class C PCYBX Class K PBFKX Class R PBFRX Class Y PICYX [LOGO] Amundi Pioneer ============== ASSET MANAGEMENT visit us: amundipioneer.com Table of Contents President's Letter 2 Portfolio Management Discussion 4 Portfolio Summary 10 Prices and Distributions 11 Performance Update 12 Comparing Ongoing Fund Expenses 17 Schedule of Investments 19 Financial Statements 96 Notes to Financial Statements 105 Report of Independent Registered Public Accounting Firm 122 Additional Information 123 Approval of New and Interim Management Agreements 125 Trustees, Officers and Service Providers 133 Pioneer Bond Fund | Annual Report | 6/30/17 1 President's Letter U.S. markets have continued to generate positive returns during the first several months of 2017, with so-called "risk" assets, such as equities and credit-sensitive bonds, posting solid gains. U.S. equities, as measured by the Standard & Poor's 500 Index, returned slightly more than 6% in the first calendar quarter of the year and more than 3% for the second quarter. Meanwhile, high-yield securities have dominated bond market performance thus far in 2017. The post-election market momentum we witnessed in the U.S. during the final weeks of the fourth quarter of 2016 slowed only when oil prices slumped in March, due to both higher-than-expected inventories and concerns over whether OPEC (Organization of Petroleum Exporting Countries) would continue its supply cuts. Not even the Federal Reserve System's (the Fed's) two rate hikes since March, nor Britain's trigger of Article 50 to begin the "Brexit" process caused any dramatic sell-off of risk assets. In fact, we are encouraged by the more hawkish stance of the Fed with regard to interest rates, in light of our view that current U.S. bond yields do not fairly reflect the prospective levels of economic activity and inflation. We expect the Fed to continue to tighten monetary policy, with at least one more rate hike likely to occur before the end of 2017. While U.S. gross domestic product (GDP) did slow in the first quarter, ending up at 1.4% after revisions, the expectation is for GDP growth to pick-up in the second quarter, with a solid consumer leading the way. It is our view that the U.S. economy may lead all developed nations in 2017, with GDP growth in excess of 2% for the full year, even if proposed tax and regulatory reforms are not passed into law in the near future. We also believe solid domestic employment figures should continue to support consumption and the housing market, and that stronger corporate profits and increased government spending may contribute to economic growth in 2018 and beyond. In addition, as we monitor global Purchasing Manager Indices (PMIs), we note that their numbers are increasing, which suggests that growth in global economies is also improving. (PMIs are used to measure the economic health of the manufacturing sector.) There are, as always, some risks to our outlook. First, the market already has priced in a good deal of the Trump economic reform platform, and that could lead to near-term disappointment if Congressional follow-through does not happen this year. The future of the Affordable Care Act (ACA) is another potential concern, as Congressional leaders have, thus far, failed to generate 2 Pioneer Bond Fund | Annual Report | 6/30/17 enough support to get new health care legislation approved by both houses. However, if a bill is eventually passed that either eliminates or significantly alters the ACA, the new law will undoubtedly have an effect on the health care sector, one of the largest segments of the U.S. economy. Geopolitical risks, of course, remain a potential headwind, given ongoing strife in the Middle East and renewed tensions on the Korean Peninsula. While our current outlook is generally optimistic, conditions can and often do change, and while passive investment strategies may have a place in one's overall portfolio, it is our view that all investment decisions are active choices. Throughout our history, we have believed in the importance of active management. The active decisions to invest in equities or fixed-income securities are made by a team of experienced investment professionals focusing on identifying value across global markets using proprietary research, careful risk management, and a long-term perspective. We believe our shareowners can benefit from the experience and tenure of our investment teams as well as the insights generated from our extensive research process. As always, and particularly during times of market uncertainty, we encourage you to work with your financial advisor to develop an overall investment plan that addresses both your short- and long-term goals, and to implement such a plan in a disciplined manner. We greatly appreciate the trust you have placed in us and look forward to continuing to serve you in the future. Sincerely, /s/ Lisa M. Jones Lisa M. Jones Head of the Americas, President and CEO of US Amundi Pioneer Asset Management USA, Inc. June 30, 2017 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. Past performance is no guarantee of future results. Pioneer Bond Fund | Annual Report | 6/30/17 3 Portfolio Management Discussion | 6/30/17 Important Note: On July 3, 2017, Amundi acquired Pioneer Investments, a group of asset management companies located throughout the world. Amundi, one of the world's largest asset managers, is headquartered in Paris, France. As a result of the transaction, Pioneer Investment Management, Inc., the Fund's investment adviser, became an indirect wholly owned subsidiary of Amundi and Amundi's wholly owned subsidiary, Amundi USA, Inc. Prior to July 3, 2017, Pioneer Investments was owned by Pioneer Global Asset Management S.p.A., a wholly owned subsidiary of UniCredit S.p.A. In connection with the transaction, the names of the Fund's investment adviser and principal underwriter changed. Effective July 3, 2017, the name of Pioneer Investment Management, Inc. changed to Amundi Pioneer Asset Management, Inc. and the name of Pioneer Funds Distributor, Inc. changed to Amundi Pioneer Distributor, Inc. This transaction does not impact your existing relationship with Pioneer Investments, your advisor, or the methods you use to communicate with us, as the investor contact telephone numbers and services you expect will remain the same. We are excited, however, to be launching a new website representing the combined company. Come visit us at: www.amundipioneer.com The bond market passed through several different phases during the 12-month period ended June 30, 2017, as investors changed their expectations about the U.S. economy's ability to show accelerated growth rates. In the following interview, Kenneth J. Taubes and Charles Melchreit discuss the factors that affected the performance of Pioneer Bond Fund during the 12-month period ended June 30, 2017. Mr. Taubes, Executive Vice President, Chief Investment Officer, U.S. Investment Management, and a portfolio manager at Amundi Pioneer Asset Management, Inc. (Amundi Pioneer), is responsible for the daily management of the Fund, along with Mr. Melchreit, Director of Investment Grade, a senior vice president and a portfolio manager at Amundi Pioneer. Q How did the Fund perform during the 12-month period ended June 30, 2017? A Pioneer Bond Fund's Class A shares returned 2.48% at net asset value during the 12-month period ended June 30, 2017, while the Fund's benchmark, the Bloomberg Barclays U.S. Aggregate Bond Index, returned -0.31%. During the same period, the average return of the 46 mutual funds in Lipper's Corporate Debt, A-rated Underlying Funds Category was 1.17%, and the average return of the 980 mutual funds in Morningstar's Intermediate-Term Bond Funds Category was 0.94%. 4 Pioneer Bond Fund | Annual Report | 6/30/17 Q How would you describe the investment environment during the 12-month period ended June 30, 2017? A Over the 12-month period, investor sentiment reflected varying degrees of confidence in the underlying strength of the domestic economy. The period began in July 2016, and the dominant market sentiment at the time was one of restrained optimism that the U.S. economy would continue to expand modestly. During that time frame, longer-maturity, higher-quality debt benefited from declining interest rates and the belief that inflation was well under control, while lower-rated, more credit-sensitive securities performed well on the belief that economic growth would persist. Those market trends changed abruptly in November 2016 with the victory of Donald Trump in the presidential election as well as assurance of continued Republican control of Congress. The election results seemed to usher in greater confidence that the pace of economic growth would accelerate, based on the expectation that President Trump and the Republicans would enact growth-oriented fiscal policies. The late-2016 "Trump rally," which saw Treasury yields rise while credit spreads narrowed, continued into the first quarter of 2017, but then faded as investors grew less optimistic that economic growth would intensify any time soon. (Credit spreads are commonly defined as the differences in yield between Treasuries and other types of fixed-income securities with similar maturities.) The loss of the post-election market momentum was based in part on weakening confidence that Republicans - in the wake of their failure to pass legislation that would alter or repeal the Affordable Care Act - could quickly reach agreement on major economic policies such as tax reform and infrastructure investment. However, the fact that the rate of U.S. economic growth did not accelerate, but instead continued along at a relatively modest, and even slower rate in the first quarter of 2017, also contributed to the less-enthusiastic market sentiment. Despite a consensus view that economic fundamentals in general remained solid, persistently low wage inflation, even with healthy gains in employment, was viewed as a sign of potential weakness. Meanwhile, the U.S. Federal Reserve (the Fed) tightened monetary policy during the period, raising the key Federal funds rate - which has a major influence on short-term interest rates - three times between December 2016 and June 2017. All of those factors led to a climate of lowered expectations that dominated market sentiment through the final few months of the Fund's fiscal year. Pioneer Bond Fund | Annual Report | 6/30/17 5 Over the 12-month period, the yield curve - which reflects the differences in yields of securities of varying maturities - flattened, as the market witnessed a change from an environment of exceptionally low rates to one in which yields of securities with shorter maturities moved higher, while yields of securities with longer maturities (ranging from 10 to 30 years) moved lower. In general, the credit-sensitive sectors, which are more reactive to changes in the economic picture, performed better than interest-rate-sensitive securities, the performance of which more closely reflects changing expectations for interest rates. For example, during the 12-month period, U.S. high-yield securities performed exceptionally well, returning 12.75%, while the Fund's benchmark, the Bloomberg Barclays U.S. Aggregate Bond Index (the Bloomberg Barclays Index), a market-value-weighted measure of Treasury and agency issues, corporate bond issues, and mortgage-backed securities, returned -0.31%. Q What were the principal factors that affected the Fund's performance relative to the benchmark Bloomberg Barclays Index during the 12-month period ended June 30, 2017? A The Fund posted solid benchmark-relative performance during the 12-month period. The main driver of the Fund's outperformance of the Bloomberg Barclays Index was sector allocation, though security selection results and duration positioning also contributed to positive benchmark-relative returns. (Duration is a measure of the sensitivity of the price, or the value of principal, of a fixed-income investment to a change in interest rates, expressed as a number of years.) With regard to asset allocation, the portfolio's overweighting of the spread sectors, which offer yield advantages over Treasuries, was a major advantage for the Fund, especially our emphasis on owning more credit-sensitive debt, including corporate bonds, asset-backed securities (ABS) and non-government mortgages. In investing the Fund in the credit sectors, we had a bias in the portfolio that favored debt with lower ratings, which also helped support benchmark-relative results. In addition, the Fund's significant underweighting of weak-performing U.S. Treasuries, which comprise 36% of the Bloomberg Barclays Index, was a significant positive contributor to benchmark-relative results. Within the portfolio's Treasury allocation, we also invested in some Treasury Inflation Protected Securities (TIPS), the face values of which adjust based on prevailing inflation rates. While the Fund's exposure to TIPS did not help relative returns in the first half of the period, 6 Pioneer Bond Fund | Annual Report | 6/30/17 the TIPS did contribute positively to relative returns over the period's final six months. A small position in event-linked insurance industry bonds also aided benchmark-relative performance during the period. Security selection also was a major positive for the Fund's benchmark-relative performance during the 12 months, especially among holdings in financials, including banks and insurance companies, and in industrial bonds. The Fund's short-duration positioning relative to the Bloomberg Barclays Index was another significant positive contributor to benchmark-relative returns. In addition, our decision to de-emphasize bonds with maturities of two- to five-years aided relative performance, as those securities underperformed due to increasing yields, which led to depreciating bond prices. At the end of the period, on June 30, 2017, the Fund's average effective duration was 5.30 years. The one major detractor from the Fund's benchmark-relative performance during the period was the portfolio's allocation to lower-risk (that is, shorter duration) commercial mortgage-backed securities (CMBS) within the lower-rated universe. Those positions struggled as the strong "risk-on" market environment favored riskier securities. Q Did the Fund have any investments in derivative securities during the 12-month period ended June 30, 2017? If so, did they have any material impact on relative performance? A Yes, we invested the Fund in Treasury futures as part of our strategy to maintain a shorter-than-benchmark duration. The strategy and the use of the futures in its implementation helped relative performance. In addition, the Fund had an allocation to credit default swaps, which were used to gain additional exposure to the high-yield sector. The swaps had no material impact on the Fund's benchmark-relative performance. Q What factors affected the Fund's yield, or distributions to shareholders, during the 12-month period ended June 30, 2017? A The Fund's yield rose slightly over the 12 months, primarily as the result of rising interest rates. Q What is your investment outlook? A In preparing for the second half of 2017, we have shortened the Fund's duration very modestly, as we think it is increasingly likely that interest rates will rise - especially after the declines in longer- and intermediate-term rates we have seen of late. In doing this, we have added to the Fund's positions in securities with five- and 10-year maturities, while cutting back Pioneer Bond Fund | Annual Report | 6/30/17 7 on the portfolio's exposure to longer-term securities. The Fund also has a small position in TIPS, as we noted earlier, as we believe we may begin to see a slight increase in inflationary pressures over time. By sector, we have slightly reduced the Fund's exposures to credit-sensitive bonds such as corporates and ABS, after their good performance in recent months. While the Fund remains overweight to credit, we have cut back the portfolio's positions more so due to concerns about higher relative valuations than because of any worries about the health of the economy, which appears fundamentally sound. At the same time, we have maintained increased exposures to securitized mortgages, including non-government agency mortgages, as we think the domestic housing industry should do well as the economy expands at a modest pace, with gross domestic product (GDP) growth averaging roughly 2% annually. We do not expect a dramatic acceleration in GDP growth, as we remain uncertain that the Trump administration and the Congress can reach agreement in the near term on any tax reform or infrastructure spending legislation that would add significant fiscal stimulus to the economy. We anticipate that the Fed will continue to gradually tighten monetary policy. However, that is already widely anticipated, and so we don't expect the Fed's tightening will have a major impact on the capital markets. 8 Pioneer Bond Fund | Annual Report | 6/30/17 Please refer to the Schedule of Investments on pages 19-95 for a full listing of Fund securities. All investments are subject to risk, including the possible loss of principal. In the past several years, financial markets have experienced increased volatility, depressed valuations, decreased liquidity and heightened uncertainty. These conditions may continue, recur, worsen or spread. When interest rates rise, the prices of fixed-income securities in the Fund will generally fall. Conversely, when interest rates fall, the prices of fixed-income securities in the Fund will generally rise. Investments in the Fund are subject to possible loss due to the financial fail- ure of the issuers of the underlying securities and their inability to meet their debt obligations. Prepayment risk is the chance that an issuer may exercise its right to prepay its security, if falling interest rates prompt the issuer to do so. Forced to reinvest the unanticipated proceeds at lower interest rates, the Fund would experience a decline in income and lose the opportunity for additional price appreciation. Investments in high-yield or lower-rated securities are subject to greater-than-average price volatility, illiquidity and possibility of default. The securities issued by U.S. Government-sponsored entities (i.e., Fannie Mae, Freddie Mac) are neither guaranteed nor issued by the U.S. Government. The portfolio may invest in mortgage-backed securities, which during times of fluctuating interest rates may increase or decrease more than other fixed- income securities. Mortgage-backed securities are also subject to pre-payments. 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. These risks may increase share price volatility. Before investing, consider the product's investment objectives, risks, charges and expenses. Contact your advisor or Amundi Pioneer for a prospectus or summary prospectus containing this information. Read it carefully. Any information in this shareholder report regarding market or economic trends or the factors influencing the Fund's historical or future performance are statements of opinion as of the date of this report. Past performance is no guarantee of future results. Pioneer Bond Fund | Annual Report | 6/30/17 9 Portfolio Summary | 6/30/17 Portfolio Diversification* -------------------------------------------------------------------------------- (As a percentage of total investment portfolio) [THE FOLLOWING DATA WAS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL] U.S. Government Securities 33.9% U.S. Corporate Bonds 25.1% Collateralized Mortgage Obligations 18.5% International Corporate Bonds 9.0% Asset Backed Securities 5.0% Senior Secured Loans 3.4% Temporary Cash Investment 2.1% Municipal Bonds 1.5% Convertible Preferred Stocks 0.9% Foreign Government Bonds 0.6% * Includes investments in insurance linked securities totaling 2.9% of total investment portfolio. 10 Largest Holdings -------------------------------------------------------------------------------- (As a percentage of total long-term holdings)** 1. U.S. Treasury Inflation Indexed Bonds, 1.0%, 2/15/46 1.57% -------------------------------------------------------------------------------- 2. U.S. Treasury Inflation Indexed Bonds, 0.75%, 2/15/45 1.29 -------------------------------------------------------------------------------- 3. U.S. Treasury Bill, 9/28/17 1.08 -------------------------------------------------------------------------------- 4. U.S. Treasury Bill, 7/16/17 0.65 -------------------------------------------------------------------------------- 5. Wells Fargo & Co., 7.5% (Perpetual) 0.51 -------------------------------------------------------------------------------- 6. Bank of America Corp., 7.25% (Perpetual) 0.50 -------------------------------------------------------------------------------- 7. BNP Paribas SA, Floating Rate Note (Perpetual) (144A) 0.41 -------------------------------------------------------------------------------- 8. Fannie Mae, 3.0%, 8/1/42 0.39 -------------------------------------------------------------------------------- 9. University Of California CA Revenues, 3.063%, 7/01/25 0.37 -------------------------------------------------------------------------------- 10. Chase Mortgage Trust 2016-2, Floating Rate Note, 2/25/44 (144A) 0.35 -------------------------------------------------------------------------------- ** 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 securities listed. 10 Pioneer Bond Fund | Annual Report | 6/30/17 Prices and Distributions | 6/30/17 Net Asset Value per Share -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Class 6/30/17 6/30/16 -------------------------------------------------------------------------------- A $9.71 $9.76 -------------------------------------------------------------------------------- C $9.60 $9.66 -------------------------------------------------------------------------------- K $9.71 $9.76 -------------------------------------------------------------------------------- R $9.80 $9.85 -------------------------------------------------------------------------------- Y $9.62 $9.67 -------------------------------------------------------------------------------- Distributions per Share: 7/1/16-6/30/17 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Net Investment Short-Term Long-Term Class Income Capital Gains Capital Gains -------------------------------------------------------------------------------- A $0.2886 $ -- $ -- -------------------------------------------------------------------------------- C $0.2148 $ -- $ -- -------------------------------------------------------------------------------- K $0.3256 $ -- $ -- -------------------------------------------------------------------------------- R $0.2666 $ -- $ -- -------------------------------------------------------------------------------- Y $0.3126 $ -- $ -- -------------------------------------------------------------------------------- Index Definition -------------------------------------------------------------------------------- The Bloomberg Barclays U.S. Aggregate Bond Index is an unmanaged measure of the U.S. bond market. Index returns are calculated monthly, assume reinvestment of dividends and, unlike Fund returns, do not reflect any fees, expenses or sales charges. It is not possible to invest directly in an index. The index defined here pertains to the "Value of $10,000 Investment" and "Value of $5 Million Investment" charts on pages 12-16. Pioneer Bond Fund | Annual Report | 6/30/17 11 Performance Update | 6/30/17 Class A Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Class A shares of Pioneer Bond Fund at public offering price during the periods shown, compared to that of the Bloomberg Barclays U.S. Aggregate Bond Index. Average Annual Total Returns (As of June 30, 2017) -------------------------------------------------------------------------------- Bloomberg Net Public U.S. Barclays Asset Offering Aggregate Value Price Bond Period (NAV) (POP) Index -------------------------------------------------------------------------------- 10 years 5.35% 4.87% 4.48% 5 years 3.41 2.46 2.21 1 year 2.48 -2.13 -0.31 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated April 1, 2017) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 0.98% 0.85% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Bloomberg Barclays U.S. Pioneer Bond Fund Aggregate Bond Index 6/07 $ 9,550 $10,000 6/08 $10,186 $10,712 6/09 $10,455 $11,360 6/10 $11,993 $12,439 6/11 $12,842 $12,924 6/12 $13,601 $13,890 6/13 $14,038 $13,795 6/14 $14,907 $14,398 6/15 $15,103 $14,666 6/16 $15,696 $15,546 6/17 $16,086 $15,497 Call 1-800-225-6292 or visit www.amundipioneer.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. NAV results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. POP returns reflect deduction of maximum 4.50% sales charge. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The net expense ratio reflects the contractual expense limitation currently in effect through November 1, 2018, for Class A shares. There can be no assurance that Amundi Pioneer will extend the expense limitation beyond such time. Please see the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. Please refer to the financial highlights for a more current expense ratio. 12 Pioneer Bond Fund | Annual Report | 6/30/17 Performance Update | 6/30/17 Class C Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Class C shares of Pioneer Bond Fund during the periods shown, compared to that of the Bloomberg Barclays U.S. Aggregate Bond Index. Average Annual Total Returns (As of June 30, 2017) -------------------------------------------------------------------------------- Bloomberg U.S. Barclays Aggregate If If Bond Period Held Redeemed Index -------------------------------------------------------------------------------- 10 years 4.46% 4.46% 4.48% 5 years 2.57 2.57 2.21 1 year 1.62 1.62 -0.31 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated April 1, 2017) -------------------------------------------------------------------------------- Gross -------------------------------------------------------------------------------- 1.60% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Bloomberg Barclays U.S. Pioneer Bond Fund Aggregate Bond Index 6/07 $10,000 $10,000 6/08 $10,579 $10,712 6/09 $10,751 $11,360 6/10 $12,216 $12,439 6/11 $12,957 $12,924 6/12 $13,620 $13,890 6/13 $13,938 $13,795 6/14 $14,662 $14,398 6/15 $14,734 $14,666 6/16 $15,218 $15,546 6/17 $15,465 $15,497 Call 1-800-225-6292 or visit www.amundipioneer.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 you paid a 1% sales charge, your returns would be lower than those shown above. "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. Please refer to the financial highlights for a more current expense ratio. Pioneer Bond Fund | Annual Report | 6/30/17 13 Performance Update | 6/30/17 Class K Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $5 million investment made in Class K shares of Pioneer Bond Fund during the periods shown, compared to that of the Bloomberg Barclays U.S. Aggregate Bond Index. Average Annual Total Returns (As of June 30, 2017) -------------------------------------------------------------------------------- Bloomberg Net Barclays U.S. Asset Aggregate Value Bond Period (NAV) Index -------------------------------------------------------------------------------- 10 years 5.52% 4.48% 5 years 3.74 2.21 1 year 2.87 -0.31 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated April 1, 2017) -------------------------------------------------------------------------------- Gross -------------------------------------------------------------------------------- 0.47% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $5 Million Investment Bloomberg Barclays U.S. Pioneer Bond Fund Aggregate Bond Index 6/07 $5,000,000 $5,000,000 6/08 $5,331,857 $5,356,157 6/09 $5,473,017 $5,680,037 6/10 $6,278,093 $6,219,543 6/11 $6,722,542 $6,462,195 6/12 $7,119,754 $6,945,160 6/13 $7,360,634 $6,897,396 6/14 $7,829,425 $7,199,043 6/15 $7,970,371 $7,332,790 6/16 $8,314,886 $7,772,859 6/17 $8,553,803 $7,748,402 Call 1-800-225-6292 or visit www.amundipioneer.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. The performance shown for Class K shares for the period prior to the commencement of operations of Class K shares on December 20, 2012, is the net asset value performance of the Fund's Class A shares, which has not been restated to reflect any differences in expenses, including Rule 12b-1 fees applicable to Class A shares. Since fees for Class A shares generally are higher than those of Class K shares, the performance of Class K shares prior to their inception would have been higher than the performance shown. Class K shares are not subject to sales charges and are available for limited groups of eligible investors, including institutional investors. All results are historical and assume the reinvestment of dividends and capital gains. 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. Please refer to the financial highlights for a more current expense ratio. 14 Pioneer Bond Fund | Annual Report | 6/30/17 Performance Update | 6/30/17 Class R Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Class R shares of Pioneer Bond Fund during the periods shown, compared to that of the Bloomberg Barclays U.S. Aggregate Bond Index. Average Annual Total Returns (As of June 30, 2017) -------------------------------------------------------------------------------- Bloomberg Net Barclays U.S. Asset Aggregate Value Bond Period (NAV) Index -------------------------------------------------------------------------------- 10 years 4.99% 4.48% 5 years 3.09 2.21 1 year 2.23 -0.31 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated April 1, 2017) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 1.21% 1.10% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Bloomberg Barclays U.S. Pioneer Bond Fund Aggregate Bond Index 6/07 $10,000 $10,000 6/08 $10,615 $10,712 6/09 $10,865 $11,360 6/10 $12,405 $12,439 6/11 $13,233 $12,924 6/12 $13,971 $13,890 6/13 $14,362 $13,795 6/14 $15,188 $14,398 6/15 $15,349 $14,666 6/16 $15,911 $15,546 6/17 $16,266 $15,497 Call 1-800-225-6292 or visit www.amundipioneer.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 R shares are not subject to sales charges and are available for limited groups of eligible investors, including institutional investors. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The net expense ratio reflects the contractual expense limitation currently in effect through November 1, 2018, for Class R shares. There can be no assurance that Amundi Pioneer will extend the expense limitation beyond such time. Please see the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. Please refer to the financial highlights for a more current expense ratio. Pioneer Bond Fund | Annual Report | 6/30/17 15 Performance Update | 6/30/17 Class Y Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $5 million investment made in Class Y shares of Pioneer Bond Fund during the periods shown, compared to that of the Bloomberg Barclays U.S. Aggregate Bond Index. Average Annual Total Returns (As of June 30, 2017) -------------------------------------------------------------------------------- Bloomberg Net Barclays U.S. Asset Aggregate Value Bond Period (NAV) Index -------------------------------------------------------------------------------- 10 years 5.62% 4.48% 5 years 3.65 2.21 1 year 2.76 -0.31 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated April 1, 2017) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 0.59% 0.58% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $5 Million Investment Bloomberg Barclays U.S. Pioneer Bond Fund Aggregate Bond Index 6/07 $5,000,000 $5,000,000 6/08 $5,345,688 $5,356,157 6/09 $5,503,383 $5,680,037 6/10 $6,332,164 $6,219,543 6/11 $6,791,284 $6,462,195 6/12 $7,217,282 $6,945,160 6/13 $7,458,092 $6,897,396 6/14 $7,936,321 $7,199,043 6/15 $8,062,189 $7,332,790 6/16 $8,402,386 $7,772,859 6/17 $8,634,379 $7,748,402 Call 1-800-225-6292 or visit www.amundipioneer.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Class Y shares are not subject to sales charges and are available for limited groups of eligible investors, including institutional investors. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The net expense ratio reflects the contractual expense limitation currently in effect through November 1, 2018, for Class Y shares. There can be no assurance that Amundi Pioneer will extend the expense limitation beyond such time. Please see the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. Please refer to the financial highlights for a more current expense ratio. 16 Pioneer Bond Fund | Annual Report | 6/30/17 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 Bond Fund Based on actual returns from January 1, 2017 through June 30, 2017. -------------------------------------------------------------------------------- Share Class A C K R Y -------------------------------------------------------------------------------- Beginning $1,000.00 $1,000.00 $1,000.00 $1,000.00 $1,000.00 Account Value on 1/1/17 -------------------------------------------------------------------------------- Ending Account $1,024.80 $1,016.20 $1,028.70 $1,022.30 $1,027.60 Value (after expenses) on 6/30/17 -------------------------------------------------------------------------------- Expenses Paid $ 4.26 $ 7.96 $ 2.36 $ 5.52 $ 2.91 During Period* -------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized net expense ratio of 0.85%, 1.59%, 0.47%, 1.10%, and 0.58% for Class A, Class C, Class K, Class R, and Class Y shares, respectively, multiplied by the average account value over the period, multiplied by 181/365 (to reflect the one-half year period). Pioneer Bond Fund | Annual Report | 6/30/17 17 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 Bond Fund Based on a hypothetical 5% per year return before expenses, reflecting the period from January 1, 2017 through June 30, 2017. -------------------------------------------------------------------------------- Share Class A C K R Y -------------------------------------------------------------------------------- Beginning $1,000.00 $1,000.00 $1,000.00 $1,000.00 $1,000.00 Account Value on 1/1/17 -------------------------------------------------------------------------------- Ending Account $1,020.58 $1,016.91 $1,022.46 $1,019.34 $1,021.92 Value (after expenses) on 6/30/17 -------------------------------------------------------------------------------- Expenses Paid $ 4.26 $ 7.95 $ 2.36 $ 5.51 $ 2.91 During Period* -------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized net expense ratio of 0.85%, 1.59%, 0.47%, 1.10%, and 0.58% for Class A, Class C, Class K, Class R, and Class Y shares, respectively, multiplied by the average account value over the period, multiplied by 181/365 (to reflect the one-half year period). 18 Pioneer Bond Fund | Annual Report | 6/30/17 Schedule of Investments | 6/30/17 ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- CONVERTIBLE PREFERRED STOCKS -- 1.0% BANKS -- 1.0% Diversified Banks -- 1.0% 18,315 Bank of America Corp., 7.25% (Perpetual) $ 23,113,347 18,101 Wells Fargo & Co., 7.5% (Perpetual) 23,732,402 -------------- $ 46,845,749 -------------- Total Banks $ 46,845,749 ---------------------------------------------------------------------------------------------------- TOTAL CONVERTIBLE PREFERRED STOCKS (Cost $44,039,805) $ 46,845,749 ---------------------------------------------------------------------------------------------------- ASSET BACKED SECURITIES -- 5.0% ENERGY -- 0.1% Oil & Gas Exploration & Production -- 0.1% 2,400,000 Colony American Finance 2016-2, Ltd., 5.028%, 11/15/48 (Step) (144A) $ 2,377,726 -------------- Total Energy $ 2,377,726 ---------------------------------------------------------------------------------------------------- MATERIALS -- 0.0%+ Steel -- 0.0%+ 472,077 1.51 Home Equity Asset Trust 2005-6, Floating Rate Note, 12/25/35 $ 472,030 -------------- Total Materials $ 472,030 ---------------------------------------------------------------------------------------------------- CONSUMER SERVICES -- 0.0%+ Hotels, Resorts & Cruise Lines -- 0.0%+ 1,144,620 Westgate Resorts 2015-1 LLC, 2.75%, 5/20/27 (144A) $ 1,147,154 -------------- Total Consumer Services $ 1,147,154 ---------------------------------------------------------------------------------------------------- FOOD & STAPLES RETAILING -- 0.0%+ Food Retail -- 0.0%+ 1,116,289 CKE Restaurant Holdings, Inc., 4.474%, 3/20/43 (144A) $ 1,114,096 -------------- Total Food & Staples Retailing $ 1,114,096 ---------------------------------------------------------------------------------------------------- HEALTH CARE EQUIPMENT & SERVICES -- 0.0%+ Health Care Distributors -- 0.0%+ 1,500,000 OneMain Financial Issuance Trust 2015-1, 3.19%, 3/18/26 (144A) $ 1,514,951 -------------- Total Health Care Equipment & Services $ 1,514,951 ---------------------------------------------------------------------------------------------------- BANKS -- 4.3% Thrifts & Mortgage Finance -- 4.3% 1,157,134 1.39 321 Henderson Receivables I LLC, Floating Rate Note, 11/15/40 (144A) $ 1,100,625 2,800,000 American Homes 4 Rent 2014-SFR3 Trust, 4.596%, 12/18/36 (144A) 2,955,896 700,000 American Homes 4 Rent 2014-SFR3 Trust, 5.04%, 12/18/36 (144A) 747,424 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/17 19 Schedule of Investments | 6/30/17 (continued) ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 1,300,000 American Homes 4 Rent 2015-SFR1, 4.11%, 4/18/52 (144A) $ 1,330,991 2,600,000 Applebee's Funding LLC/ IHOP Funding LLC, 4.277%, 9/5/44 (144A) 2,559,320 2,200,000 Ascentium Equipment Receivables 2015-1 LLC, 3.24%, 1/10/22 (144A) 2,212,409 1,300,000 Ascentium Equipment Receivables 2016-2 Trust, 4.2%, 9/10/22 (144A) 1,326,386 699,990 Axis Equipment Finance Receivables III LLC, 3.41%, 4/20/20 (144A) 676,515 3,357,637 B2R Mortgage Trust 2015-1, 2.524%, 5/15/48 (144A) 3,334,080 82,953 1.79 Bayview Financial Mortgage Pass-Through Trust 2005-C, Floating Rate Note, 6/28/44 82,779 4,704,772 Bayview Opportunity Master Fund IVA Trust 2016-SPL1, 4.0%, 4/28/55 (144A) 4,885,529 7,245,000 Bayview Opportunity Master Fund IVA Trust Series 2017-Spl5 Cl A, 3.50% 6/28/57 (144A) 7,433,845 6,681,080 4.00 Bayview Opportunity Master Fund IVB Trust 2016-SPL2, Floating Rate Note, 6/28/53 (144A) 6,951,122 7,027,709 Bayview Opportunity Master Fund IVB Trust Ser 2017-Spl3 Cl A, 4.00% 11/28/53 (144A) 7,337,496 3,894,140 Bayview Opportunity Master Fund IVB Trust Series 2017-Spl4 Cl A, 3.50%, 1/28/55 (144A) 3,993,674 1,650,000 BCC Funding Corp X, 3.622%, 11/20/20 (144A) 1,654,422 558,363 1.97 Bear Stearns Asset Backed Securities I Trust 2005-FR1, Floating Rate Note, 6/25/35 558,363 393,711 1.71 Bear Stearns Asset Backed Securities Trust 2006-SD2, Floating Rate Note, 6/25/36 387,818 1,694,842 BXG Receivables Note Trust 2015-A, 2.88%, 5/2/30 (144A) 1,681,868 1,400,000 CIT Equipment Collateral 2014-VT1, 2.65%, 10/20/22 (144A) 1,401,255 217,532 1.97 Citigroup Mortgage Loan Trust, Inc., Floating Rate Note, 5/25/35 (144A) 217,143 5,006,872 Colony American Finance 2015-1, Ltd., 2.896%, 10/18/47 (144A) 5,011,449 3,400,000 2.84 Colony American Homes 2014-1, Floating Rate Note, 5/19/31 (144A) 3,428,456 999,977 Conn's Receivables Funding 2016-B LLC, 3.73%, 10/15/18 (144A) 1,001,568 1,500,000 Credit Acceptance Auto Loan Trust 2016-2, 4.29%, 11/15/24 (144A) 1,542,001 1,248,776 CRG Issuer 2015-1, 4.07%, 7/11/22 (144A) 1,245,654 290,343 2.27 CWABS Asset-Backed Certificates Trust 2004-7, Floating Rate Note, 12/25/34 291,325 The accompanying notes are an integral part of these financial statements. 20 Pioneer Bond Fund | Annual Report | 6/30/17 ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 488,750 DB Master Finance LLC 2015-1, 3.98%, 2/20/45 (144A) $ 501,135 1,344,309 3.02 DRB Prime Student Loan Trust 2016-B, Floating Rate Note, 6/25/40 (144A) 1,371,721 599,818 4.01 Drug Royalty II LP 2, Floating Rate Note, 7/15/23 (144A) 603,340 2,000,000 DT Auto Owner Trust 2015-1, 4.26%, 2/15/22 (144A) 2,033,436 1,300,000 Engs Commercial Finance Trust 2016-1, 3.45%, 3/22/22 (144A) 1,278,585 1,900,000 Engs Commercial Finance Trust 2016-1, 5.22%, 1/22/24 (144A) 1,869,787 5,823,311 1.46 Fieldstone Mortgage Investment Trust Series 2005-3, Floating Rate Note, 2/25/36 5,735,018 380,867 GMAT 2013-1 Trust, 6.9669%, 8/25/53 (Step) 381,433 1,900,000 Green Tree Agency Advance Funding Trust I, 4.0575%, 10/15/48 (144A) 1,888,391 138,289 1.97 GSAMP Trust 2005-HE1, Floating Rate Note, 12/25/34 138,289 1,026,772 2.57 GSRPM Mortgage Loan Trust 2003-2, Floating Rate Note, 6/25/33 1,022,658 303,244 1.52 GSRPM Mortgage Loan Trust 2006-2, Floating Rate Note, 9/25/36 (144A) 300,504 2,882,250 HOA Funding LLC, 4.846%, 8/22/44 (144A) 2,725,974 38,034 1.60 Home Equity Asset Trust 2005-7, Floating Rate Note, 1/25/36 38,033 765,461 1.59 Home Equity Mortgage Loan Asset-Backed Trust Series INABS 2005-C, Floating Rate Note, 10/25/35 763,117 1,255,863 Icon Brand Holdings LLC, 4.229%, 1/26/43 (144A) 1,191,582 271,536 Icon Brand Holdings LLC, 4.352%, 1/25/43 (144A) 252,627 317,653 2.36 Invitation Homes 2014-SFR3 Trust, Floating Rate Note, 12/17/31 (144A) 318,184 193,740 2.72 Irwin Whole Loan Home Equity Trust 2003-C, Floating Rate Note, 6/25/28 191,961 3,750,000 Kabbage Asset Securitization LLC Series 2017-1 Cl A, 4.571% 3/15/22 (144A) 3,836,225 850,000 LEAF Receivables Funding 10 LLC, 2.74%, 3/15/21 (144A) 843,917 1,200,000 Leaf Receivables Funding 11 LLC, 4.89%, 1/15/23 (144A) 1,259,927 700,000 Leaf Receivables Funding 12 LLC Series 2017-1 Cl C, 2.83% 4/15/22 (144A) 697,152 800,000 Leaf Receivables Funding 12 LLC Series 2017-1 Cl D, 3.10%, 4/15/22 (144A) 796,762 112,388 Lehman ABS Manufactured Housing Contract Trust 2001-B, 3.01%, 5/15/41 112,780 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/17 21 Schedule of Investments | 6/30/17 (continued) ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 949,015 Nations Equipment Finance Funding II LLC, 3.276%, 1/22/19 (144A) $ 949,439 150,757 1.37 Nationstar Home Equity Loan Trust 2007-A, Floating Rate Note, 3/25/37 150,649 1,000,000 6.71 NCF Dealer Floorplan Master Trust, Floating Rate Note, 3/21/22 (144A) 983,398 761,456 1.72 New Century Home Equity Loan Trust 2005-1, Floating Rate Note, 3/25/35 761,217 5,700,000 New Residential Advance Receivables Trust Ad Series 2016-T2 Cl Bt2, 3.0199%, 10/15/49 (144A) 5,704,342 5,895,120 New Residential Mortgage Loan Trust 2017-1 Series 2017-1A Cl A1, 4.00%, 2/25/57 (144A) 6,128,777 6,570,000 New Residential Mortgage Loan Trust 2017-3 Series 2017-3A Cl A1, 4.00%, 4/25/57 (144A) 6,823,788 1,050,000 NextGear Floorplan Master Owner Trust, 1.92%, 10/15/19 (144A) 1,050,849 1,000,000 NextGear Floorplan Master Owner Trust, 2.61%, 10/15/19 (144A) 999,291 1,200,000 2.09 NextGear Floorplan Master Owner Trust, Floating Rate Note, 9/15/21 (144A) 1,201,626 88,859 2.87 NovaStar Mortgage Funding Trust Series 2004-4, Floating Rate Note, 3/25/35 89,040 3,800,000 1.89 NovaStar Mortgage Funding Trust Series 2005-3, Floating Rate Note, 1/25/36 3,765,689 4,415,303 Novastar Mortgage Funding Trust Series 2006-1 Ser 2006-1 Cl A1, 1.376% , 5/25/36 4,295,653 1,000,000 Ocwen Master Advance Receivables Trust, 2.5207%, 8/17/48 (144A) 995,386 1,600,000 Oportun Funding III LLC, 3.69%, 7/8/21 (144A) 1,615,303 1,200,000 Option One Mortgage Loan Trust 2005-3 Series 2005-3 Cl M2, 1.706%, 8/25/35 1,156,792 2,100,000 Oxford Finance Funding 2016-1 LLC, 3.968%, 6/17/24 (144A) 2,083,386 1,000,000 2.01 PFS Financing Corp., Floating Rate Note, 10/15/19 (144A) 998,382 775,000 Prestige Auto Receivables Trust 2013-1, 3.04%, 7/15/20 (144A) 775,207 2,000,000 Progreso Receivables Funding IV LLC, 3.0%, 7/8/20 (144A) 2,007,618 282,543 1.47 RAAC Series 2006-RP2 Trust, Floating Rate Note, 2/25/37 (144A) 281,124 1,691,697 SCF Equipment Trust 2016-1 LLC, 3.62%, 11/20/21 (144A) 1,700,050 107,301 Skopos Auto Receivables Trust 2015-1, 3.1%, 12/15/23 (144A) 107,379 600,000 Skopos Auto Receivables Trust 2015-1, 5.43%, 12/15/23 (144A) 606,131 The accompanying notes are an integral part of these financial statements. 22 Pioneer Bond Fund | Annual Report | 6/30/17 ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 1,384,833 STORE Master Funding I LLC, 3.75%, 4/20/45 (144A) $ 1,402,356 1,943,047 STORE Master Funding LLC, 5.77%, 8/20/42 (144A) 1,948,594 195,857 1.42 Structured Asset Investment Loan Trust 2006-1, Floating Rate Note, 1/25/36 195,089 18,571 Structured Asset Securities Corp., 5.27%, 10/25/34 (Step) 19,120 282,978 SVO 2012-A VOI Mortgage LLC, 2.0%, 9/20/29 (144A) 280,309 1,233,170 Terwin Mortgage Trust Series TMTS 2005-16HE, 4.26762%, 9/25/36 (Step) 1,245,773 2,000,000 Tidewater Sales Finance Master Trust Series 2 Series 2017-Aa Cl A, 4.55%, 5/15/21 (144A) 2,000,488 940,000 Towd Point Mortgage Trust 2015-1 Series 2015-1 Cl A2 3.25%, 10/25/53 (144A) 938,493 10,588,174 Towd Point Mortgage Trust 2015-1 Series 2015-2 Cl 1A13 2.50%, 11/25/60 (144A) 10,584,799 5,952,693 Towd Point Mortgage Trust 2015-3 Series 2015-3 Cl A1A, 3.50% , 3/25/54 (144A) 6,072,580 2,590,713 Towd Point Mortgage Trust 2015-3 Series 2015-3 Cl A4B 3.50%, 3/25/54 (144A) 2,574,385 7,500,000 Towd Point Mortgage Trust 2015-6 Series 2015-6 Cl M1, 3.75 %, 4/25/55 (144A) 7,568,481 667,375 Towd Point Mortgage Trust 2016-2 Series 2016-2 Cl A1A, 2.75%, 8/25/55 (144A) 671,930 481,414 Towd Point Mortgage Trust 2017-2 Series 2017-2 Cl A1, 2.75%, 4/25/57 (144A) 486,003 8,115,000 Towd Point Mortgage Trust 2017-2 Series 2017-2 Cl A2 3.25%, 4/25/57 (144A) 8,270,578 1,070,000 Towd Point Mortgage Trust 2017-2 Series 2017-2 Cl A4, 2.87719%, 4/25/57 (144A) 1,083,849 3,000,000 Trafigura Securitisation Finance Plc 2 Series 2017-1A Cl A1 2.05%, 12/15/20 (144A) 3,000,000 800,000 3.41 Trafigura Securitisation Finance Plc. 2014-1, Floating Rate Note, 4/16/18 (144A) 799,502 962,509 United Auto Credit Securitization Trust 2015-1, 2.92%, 6/17/19 (144A) 964,138 1,724,570 VOLT XXXIII LLC, 3.5%, 3/25/55 (Step) (144A) 1,730,884 1,166,047 Welk Resorts 2015-A LLC, 2.79%, 6/16/31 (144A) 1,162,603 2,913,725 Westgate Resorts 2016-1 LLC, 4.5%, 12/20/28 (144A) 2,925,866 1,886,719 Westgate Resorts 2017-1 LLC Series 2017-1A Cl A, 3.05%, 12/20/30 (144A) 1,891,453 1,000,000 Westlake Automobile Receivables Trust 2015-3, 3.05%, 5/17/21 (144A) 1,005,081 1,000,000 Westlake Automobile Receivables Trust 2016-1, 3.29%, 9/15/21 (144A) 1,009,933 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/17 23 Schedule of Investments | 6/30/17 (continued) ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 2,923,658 3.50 WinWater Mortgage Loan Trust 2015-5, Floating Rate Note, 8/20/45 (144A) $ 2,955,292 -------------- $ 203,520,046 -------------- Total Banks $ 203,520,046 ---------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 0.4% Other Diversified Financial Services -- 0.2% 500,000 American Credit Acceptance Receivables Trust 2014-1, 5.2%, 4/12/21 (144A) $ 500,457 1,000,000 3.31 Colony American Homes 2014-1 REMICS, Floating Rate Note, 5/17/31 (144A) 1,004,156 324,021 Diamond Resorts Owner Trust 2015-1, 3.17%, 7/20/27 (144A) 324,291 477,737 PFS Tax Lien Trust 2014-1, 1.44%, 5/15/29 (144A) 474,080 85,563 Sierra Timeshare 2012-3 Receivables Funding LLC, 1.87%, 8/20/29 (144A) 85,500 216,090 Small Business Administration Participation Certificates, 4.2%, 9/1/29 228,438 290,394 Small Business Administration Participation Certificates, 4.625%, 2/1/25 303,806 275,693 Small Business Administration Participation Certificates, 4.84%, 5/1/25 289,613 378,409 Small Business Administration Participation Certificates, 5.37%, 4/1/28 411,855 277,335 Small Business Administration Participation Certificates, 5.63%, 10/1/28 303,506 96,255 Small Business Administration Participation Certificates, 5.72%, 1/1/29 105,766 410,646 Small Business Administration Participation Certificates, 6.02%, 8/1/28 453,142 89,908 Small Business Administration Participation Certificates, 6.14%, 1/1/22 95,207 220,788 Small Business Administration Participation Certificates, 6.22%, 12/1/28 244,634 3,300,000 Spirit Master Funding LLC, 4.6291%, 1/20/45 (144A) 3,267,908 -------------- $ 8,092,359 ---------------------------------------------------------------------------------------------------- Specialized Finance -- 0.2% 3,530,313 Domino's Pizza Master Issuer LLC, 3.484%, 10/25/45 (144A) $ 3,565,368 1,896,213 Domino's Pizza Master Issuer LLC, 5.216%, 1/27/42 (144A) 1,897,123 1,980,036 Hercules Capital Funding Trust 2014-1, 3.524%, 4/16/21 (144A) 1,984,367 486,764 JG Wentworth XXII LLC, 3.82%, 12/15/48 (144A) 491,687 -------------- $ 7,938,545 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 24 Pioneer Bond Fund | Annual Report | 6/30/17 ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- Consumer Finance -- 0.0%+ 2,100,000 First Investors Auto Owner Trust 2014-3, 2.97%, 11/16/20 (144A) $ 2,120,395 510,000 First Investors Auto Owner Trust 2015-1, 3.59%, 1/18/22 (144A) 515,203 -------------- $ 2,635,598 -------------- Total Diversified Financials $ 18,666,502 ---------------------------------------------------------------------------------------------------- TELECOMMUNICATION SERVICES -- 0.2% Wireless Telecommunication Services -- 0.2% 6,975,000 3.87 Small Business Administration Participation Certificates, Floating Rate Note, 10/15/49 (144A) $ 7,077,269 -------------- Total Telecommunication Services $ 7,077,269 ---------------------------------------------------------------------------------------------------- TOTAL ASSET BACKED SECURITIES (Cost $235,528,825) $ 235,889,774 ---------------------------------------------------------------------------------------------------- COLLATERALIZED MORTGAGE OBLIGATIONS -- 18.5% BANKS -- 17.6% Thrifts & Mortgage Finance -- 17.6% 240,628 A10 Term Asset Financing 2013-2 LLC, 2.62%, 11/15/27 (144A) $ 240,494 1,769,482 3.90 Agate Bay Mortgage Trust 2014-1 REMICS, Floating Rate Note, 7/25/44 (144A) 1,736,360 1,373,860 Agate Bay Mortgage Trust 2014-1 Series 2014-1 Cl 1A11, 4.00%, 7/25/44 (144A) 1,416,739 4,804,781 3.50 Agate Bay Mortgage Trust 2015-1, Floating Rate Note, 1/25/45 (144A) 4,856,769 2,872,102 3.50 Agate Bay Mortgage Trust 2015-2, Floating Rate Note, 3/27/45 (144A) 2,902,170 3,765,679 3.50 Agate Bay Mortgage Trust 2015-5, Floating Rate Note, 7/25/45 (144A) 3,806,423 6,385,253 3.50 Agate Bay Mortgage Trust 2015-7, Floating Rate Note, 10/25/45 (144A) 6,506,375 3,656,955 3.50 Agate Bay Mortgage Trust 2016-1, Floating Rate Note, 12/25/45 (144A) 3,729,523 143,045 1.67 Alternative Loan Trust 2003-14T1, Floating Rate Note, 8/25/18 111,919 5,000,000 2.91 Arbor Realty Collateralized Loan Obligation 2015-FL1, Ltd., Floating Rate Note, 3/17/25 (144A) 4,999,978 5,200,000 Arbor Realty Commercial Real Estate Notes 20 Series 2017-Fl1 Cl B, 0.658%, 4/15//27 (144A) 5,176,954 5,900,000 3.36 BAMLL Commercial Mortgage Securities Trust 2014-FL1, Floating Rate Note, 12/17/31 (144A) 5,914,814 4,200,000 2.70 BAMLL Commercial Mortgage Securities Trust 2015-ASHF, Floating Rate Note, 1/18/28 (144A) 4,198,333 1,900,000 6.16 Banc of America Commercial Mortgage Trust 2007-4, Floating Rate Note, 2/10/51 (144A) 1,895,314 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/17 25 Schedule of Investments | 6/30/17 (continued) ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 7,460,000 Bank 2017-Bnk5 Series 2017-Bnk5 Cl As, 3.624%, 6/15/60 $ 7,587,150 6,196,620 Bayview Commercial Asset Trust 2007-2, 7/27/37 (Step) (144A) (h) 6 720,564 2.97 Bayview Opportunity Master Fund IVB Trust 2016-CRT1, Floating Rate Note, 10/27/27 (144A) 720,506 820,491 5.21 Bear Stearns Commercial Mortgage Securities Trust 2005-PWR7, Floating Rate Note, 2/11/41 819,245 1,102,590 5.72 Bellemeade Re II, Ltd., Floating Rate Note, 4/25/26 (144A) 1,114,649 500,000 2.51 BLCP Hotel Trust, Floating Rate Note, 8/15/29 (144A) 500,472 2,210,000 3.11 BLCP Hotel Trust, Floating Rate Note, 8/15/29 (144A) 2,212,777 3,250,000 CCRESG Commercial Mortgage Trust 2016-HEAT, 3.357%, 4/10/29 (144A) 3,291,571 4,000,000 3.66 CDGJ Commercial Mortgage Trust 2014-BXCH, Floating Rate Note, 12/15/27 (144A) 3,997,512 16,117,146 3.70 Chase Mortgage Trust 2016-2, Floating Rate Note, 2/25/44 (144A) 16,343,898 273,685 3.40 CHL Mortgage Pass-Through Trust 2003-56, Floating Rate Note, 12/25/33 277,166 3,400,000 Citigroup Commercial Mortgage Trust 2014-GC19 Series 2014-GC19 Cl B 4.81%, 3/10/47 3,659,791 5,000,000 Citigroup Commercial Mortgage Trust 2014-GC25 REMICS, 3.371%, 10/11/47 5,206,204 6,000,000 Citigroup Commercial Mortgage Trust 2014-GC25 Series 2014-Gc25 Cl B 4.345%, 10/10/47 6,248,495 3,100,000 Citigroup Commercial Mortgage Trust 2015-GC27 Series 2015-GC27 Cl A5, 3.137%, 2/10/48 3,114,182 2,400,000 Colony American Finance 2016-1, Ltd., 5.972%, 6/15/48 (Step) (144A) 2,533,051 1,711,582 3.51 Colony American Homes 2014-2 REMICS, Floating Rate Note, 7/17/31 (144A) 1,716,562 2,100,000 2.91 Colony Starwood Homes 2016-2 Trust, Floating Rate Note, 12/19/33 (144A) 2,100,877 450,000 COMM 2012-CCRE2 Mortgage Trust REMICS, 3.791%, 8/17/45 468,546 915,000 COMM 2012-CCRE4 Mortgage Trust, 2.436%, 10/17/45 923,832 5,000,000 5.34 COMM 2013-CCRE11 Mortgage Trust, Floating Rate Note, 8/12/50 (144A) 5,322,756 1,900,000 COMM 2013-LC6 Mortgage Trust, 2.941%, 1/10/46 1,920,325 7,325,000 4.66 COMM 2014-CCRE20 Mortgage Trust, Floating Rate Note, 11/10/47 7,456,958 3,800,000 3.31 COMM 2014-FL5 Mortgage Trust, Floating Rate Note, 10/15/31 (144A) 3,778,659 The accompanying notes are an integral part of these financial statements. 26 Pioneer Bond Fund | Annual Report | 6/30/17 ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 4,500,000 4.94 COMM 2014-UBS3 Mortgage Trust, Floating Rate Note, 6/12/47 $ 4,387,778 4,100,000 COMM 2014-UBS4 Mortgage Trust, 3.42%, 8/10/47 4,190,283 1,750,000 3.81 COMM 2015-CCRE23 Mortgage Trust, Floating Rate Note, 5/12/48 (144A) 1,744,732 3,104,000 4.70 COMM 2015-CCRE25 Mortgage Trust, Floating Rate Note, 8/12/48 3,274,965 3,375,000 COMM 2015-CCRE26 Mortgage Trust REMICS, 3.63%, 10/13/48 3,495,678 4,225,000 COMM 2015-LC23 Mortgage Trust REMICS, 3.774%, 10/10/53 4,419,999 3,850,000 Commercial Mortgage Pass Through Certificates, 2.822%, 10/17/45 3,892,864 104,325 Credit Suisse First Boston Mortgage Securities Corp., 5.5%, 6/25/33 105,507 5,700,000 4.69 CSAIL 2016-C5 Commercial Mortgage Trust REMICS, Floating Rate Note, 11/15/48 5,789,807 2,090,000 CSAIL 2016-C6 Commercial Mortgage Trust, 3.0898%, 1/15/49 2,074,228 2,700,000 3.41 CSMC 2015-TWNI Trust, Floating Rate Note, 3/15/28 (144A) 2,698,816 2,487,024 CSMC Trust 2013-6 Series 2013-6 Cl 1A1, 2.50%, 7/25/28 (144A) 2,448,650 10,117,278 3.50 CSMC Trust 2013-6, Floating Rate Note, 8/25/43 (144A) 10,291,164 4,522,851 3.50 CSMC Trust 2013-7, Floating Rate Note, 8/25/43 (144A) 4,571,788 5,222,204 3.58 CSMC Trust 2013-7, Floating Rate Note, 8/25/43 (144A) 5,071,419 5,621,180 1.55 CSMC Trust 2013-IVR2, Floating Rate Note, 4/27/43 (144A) 5,308,858 4,963,569 CSMC Trust 2013-IVR3 Series 2013- Cl A1: CSMC FLT, 2.50%, 5/25/43 (144A) 4,717,331 2,846,602 CSMC Trust 2013-IVR3 Series 2013 Cl B4, 3.459%, 5/25/43 (144A) 2,766,072 2,501,800 1.55 CSMC Trust 2013-IVR3, Floating Rate Note, 5/25/43 (144A) 2,408,484 3,253,260 3.46 CSMC Trust 2013-IVR3, Floating Rate Note, 5/25/43 (144A) 3,332,722 3,791,855 3.46 CSMC Trust 2013-IVR3, Floating Rate Note, 5/25/43 (144A) 3,824,759 2,109,396 3.00 CSMC Trust 2013-IVR4, Floating Rate Note, 7/27/43 (144A) 2,108,122 2,976,765 CSMC Trust 2013-IVR5 Series 2013 Cl B4, 3.66%, 10/25/43 (144A) 2,954,452 10,436,536 CSMC Trust 2013-Th1 Series 2013-Th1 Cl A1 2.13%, 2/25/43, (144A) 9,977,756 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/17 27 Schedule of Investments | 6/30/17 (continued) ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 3,241,785 3.50 CSMC Trust 2014-IVR3 REMICS, Floating Rate Note, 7/25/44 (144A) $ 3,267,557 1,602,401 3.00 CSMC Trust 2014-OAK1, Floating Rate Note, 11/25/44 (144A) 1,599,591 5,313,024 3.94 CSMC Trust 2014-WIN1, Floating Rate Note, 9/25/44 (144A) 4,916,057 2,860,036 4.01 CSMC Trust 2014-WIN2, Floating Rate Note, 10/25/44 (144A) 2,849,716 10,851,200 CSMC Trust 2015-2, 3.0%, 2/25/45 (144A) 10,702,389 4,353,510 CSMC Trust 2015-2, 3.0%, 2/25/45 (144A) 4,352,490 3,121,118 CSMC Trust 2015-2, 3.5%, 2/25/45 (144A) 3,159,766 2,770,637 3.87 CSMC Trust 2015-WIN1, Floating Rate Note, 12/25/44 (144A) 2,666,502 8,700,899 3.50 CSMLT 2015-1 Trust, Floating Rate Note, 5/25/45 (144A) 8,832,544 38,329 3.91 CSMLT 2015-2 Trust, Floating Rate Note, 8/25/45 (144A) 36,666 4,143,932 3.50 CSMLT 2015-2 Trust, Floating Rate Note, 8/28/45 (144A) 4,188,770 4,390,000 DBJPM 16-C3 Mortgage Trust, 2.89%, 9/10/49 4,314,775 3,777,825 3.48 EverBank Mortgage Loan Trust REMICS, Floating Rate Note, 4/25/43 (144A) 3,747,528 4,630,000 3.49 GAHR Commercial Mortgage Trust 2015-NRF, Floating Rate Note, 12/15/34 (144A) 4,714,054 777,748 Global Mortgage Securitization, Ltd., 5.25%, 4/25/32 (144A) 764,206 1,516,385 4.68 Government National Mortgage Association, Floating Rate Note, 1/16/50 1,572,945 2,800,000 GS Mortgage Securities Corp., Trust 2012-SHOP, 2.933%, 6/5/31 (144A) 2,848,070 1,000,000 GS Mortgage Securities Corp., II, 3.682%, 2/10/46 (144A) 1,024,162 3,770,278 GS Mortgage-Backed Securities Trust Series 2014-EB1A Cl B3, 3.14%, 7/25/44 (144A) 3,693,294 750,000 Home Partners Of America 2017-1 Trust Series 2017-1 Cl B, 2.435 %, 7/17/34 (144A) 752,408 2,100,000 2.86 Hyatt Hotel Portfolio Trust 2015-HYT, Floating Rate Note, 11/15/29 (144A) 2,102,646 324,678 1.31 JP Morgan Chase Commercial Mortgage Securities Trust 2006-LDP9, Floating Rate Note, 5/15/47 323,821 1,136,995 JP Morgan Chase Commercial Mortgage Securities Trust 2011-C5, 4.1712%, 8/15/46 1,210,468 1,200,000 3.98 JP Morgan Chase Commercial Mortgage Securities Trust 2012-C8, Floating Rate Note, 10/17/45 (144A) 1,244,541 4,555,234 JP Morgan Chase Commercial Mortgage Securities Trust 2012-LC9, 2.84%, 12/15/47 4,609,592 The accompanying notes are an integral part of these financial statements. 28 Pioneer Bond Fund | Annual Report | 6/30/17 ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 4,600,000 3.11 JP Morgan Chase Commercial Mortgage Securities Trust 2014-CBM, Floating Rate Note, 10/15/29 (144A) $ 4,608,592 2,200,000 3.36 JP Morgan Chase Commercial Mortgage Securities Trust 2014-FL4 REMICS, Floating Rate Note, 12/16/30 (144A) 2,181,576 900,000 3.26 JP Morgan Chase Commercial Mortgage Securities Trust 2014-FL5 REMICS, Floating Rate Note, 7/15/31 (144A) 888,746 1,260,000 2.51 JP Morgan Chase Commercial Mortgage Securities Trust 2014-FL5, Floating Rate Note, 7/15/31 (144A) 1,265,668 4,000,000 3.91 JP Morgan Chase Commercial Mortgage Securities Trust 2015-SGP, Floating Rate Note, 7/15/36 (144A) 4,024,923 4,801,790 3.00 JP Morgan Mortgage Trust 2013-1, Floating Rate Note, 3/25/43 (144A) 4,783,222 10,813,413 2.50 JP Morgan Mortgage Trust 2013-1, Floating Rate Note, 3/25/43 (144A) 10,761,455 3,906,239 3.00 JP Morgan Mortgage Trust 2013-1, Floating Rate Note, 3/25/43 (144A) 3,950,489 2,191,983 JP Morgan Mortgage Trust 2013-2 Series 2013-2 Cl B4, 3.659%, 5/25/43 (144A) 2,078,651 883,816 3.50 JP Morgan Mortgage Trust 2013-2, Floating Rate Note, 5/25/43 (144A) 896,693 4,693,057 3.50 JP Morgan Mortgage Trust 2014-1 REMICS, Floating Rate Note, 1/25/44 (144A) 4,761,435 3,017,935 3.75 JP Morgan Mortgage Trust 2014-1 REMICS, Floating Rate Note, 1/25/44 (144A) 2,902,422 989,240 3.50 JP Morgan Mortgage Trust 2014-1 REMICS, Floating Rate Note, 1/25/44 (144A) 1,001,180 3,144,224 3.75 JP Morgan Mortgage Trust 2014-1 REMICS, Floating Rate Note, 1/25/44 (144A) 3,047,374 313,304 JP Morgan Mortgage Trust 2014-2 Series 2014-2 Cl B1, 3.424%, 6/25/29 (144A) 314,134 5,882,201 3.00 JP Morgan Mortgage Trust 2014-2, Floating Rate Note, 6/25/29 (144A) 5,935,965 5,029,969 3.40 JP Morgan Mortgage Trust 2014-2, Floating Rate Note, 6/25/29 (144A) 5,076,212 1,222,228 3.42 JP Morgan Mortgage Trust 2014-2, Floating Rate Note, 6/25/29 (144A) 1,162,775 3,494,054 3.00 JP Morgan Mortgage Trust 2014-5, Floating Rate Note, 10/25/29 (144A) 3,527,083 2,073,522 3.00 JP Morgan Mortgage Trust 2014-5, Floating Rate Note, 10/25/29 (144A) 1,985,422 435,403 JP Morgan Mortgage Trust 2015-4 Series 2015-4 Cl B1, 3.625%, 6/25/45 (144A) 429,215 6,809,364 3.50 JP Morgan Mortgage Trust 2015-4, Floating Rate Note, 6/26/45 (144A) 6,904,320 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/17 29 Schedule of Investments | 6/30/17 (continued) ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 10,655,648 JP Morgan Mortgage Trust 2016-1, 3.5%, 5/25/46 (144A) $ 10,804,241 4,200,811 3.90 JP Morgan Mortgage Trust 2016-1, Floating Rate Note, 5/25/46 (144A) 4,101,228 11,125,291 JP Morgan Mortgage Trust 2016-2, 2.690842%, 6/25/46 (144A) 10,972,710 13,421,292 3.00 JP Morgan Mortgage Trust 2016-3, Floating Rate Note, 10/25/46 (144A) 13,565,598 9,244,860 3.50 JP Morgan Mortgage Trust 2016-4, Floating Rate Note, 10/25/46 (144A) 9,416,758 7,121,633 3.50 JP Morgan Mortgage Trust 2017-1, Floating Rate Note, 1/25/47 (144A) 7,216,493 9,000,000 3.50 JP Morgan Mortgage Trust 2017-1, Floating Rate Note, 1/25/47 (144A) 9,045,279 13,444,326 JP Morgan Mortgage Trust 2017-2 Series 2017-2 Cl A3, 3.50%, 5/25/47 (144A) 13,639,672 1,465,547 JP Morgan Mortgage Trust 2017-2 Series 2017-2 Cl B1, 3.763%, 5/25/47, (144A) 1,470,382 11,641,701 2.60 JP Morgan Mortgage Trust, Floating Rate Note, 12/25/46 (144A) 11,617,508 7,856,984 2.62 JP Morgan Trust 2015-1 REMICS, Floating Rate Note, 12/25/44 (144A) 7,803,776 3,671,268 3.00 JP Morgan Trust 2015-3 REMICS, Floating Rate Note, 5/25/45 (144A) 3,678,222 3,203,127 3.70 JP Morgan Trust 2015-3 REMICS, Floating Rate Note, 5/25/45 (144A) 3,230,336 4,377,768 3.70 JP Morgan Trust 2015-3 REMICS, Floating Rate Note, 5/25/45 (144A) 4,165,435 313,329 JP Morgan Trust 2015-6 Series 2015-6 Cl B1, 3.621% , 10/25/45, (144A) 310,850 3,676,192 3.50 JP Morgan Trust 2015-6, Floating Rate Note, 10/25/45 (144A) 3,727,456 4,050,000 JPMBB Commercial Mortgage Securities Trust 2014-C22 REMICS, 3.8012%, 9/15/47 4,238,589 2,000,000 3.22 JPMDB Commercial Mortgage Securities Trust 2016-C4, Floating Rate Note, 12/15/49 (144A) 1,547,578 2,142,952 La Hipotecaria El Salvadorian Mortgage Trust 2016-1, 3.3575%, 1/15/46 (144A) 2,168,475 1,282,235 2.25 La Hipotecaria Panamanian Mortgage Trust 2010-1, Floating Rate Note, 9/8/39 (144A) 1,327,514 3,476,825 3.01 La Hipotecaria Panamanian Mortgage Trust 2014-1, Floating Rate Note, 11/24/42 (144A) 3,496,383 3,690,000 3.35 LSTAR Commercial Mortgage Trust 2015-3, Floating Rate Note, 4/20/48 (144A) 3,680,749 1,865,102 Marketplace Loan Trust 2016-BS1 Series 2016 Cl A, 4.50%, 1/15/21 (144A) 1,868,599 The accompanying notes are an integral part of these financial statements. 30 Pioneer Bond Fund | Annual Report | 6/30/17 ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 546,935 1.60 Mellon Residential Funding Corp. Mortgage Pass-Through Trust Series 2000-TBC3, Floating Rate Note, 12/15/30 $ 529,442 11,260,000 Mill City Mortgage Loan Trust 2017-2 Series 2017-2 Cl A1, 2.75 %, 7/25/59 (144A) 11,364,211 5,750,000 Morgan Stanley Bank of America Merrill Lynch Trust 2012-C6, 2.858%, 11/15/45 5,834,333 9,231,000 Morgan Stanley Bank of America Merrill Lynch Trust 2016-C31, 3.527%, 10/15/26 9,372,163 2,850,883 Morgan Stanley Capital I Trust 2007-HQ13, 5.569%, 12/15/44 2,866,276 5,309,000 Morgan Stanley Capital I Trust 2016-UBS12, 3.596%, 12/15/49 5,487,236 6,059,645 3.75 New Residential Mortgage Loan Trust 2015-1, Floating Rate Note, 5/28/52 (144A) 6,170,806 4,917,280 3.75 New Residential Mortgage Loan Trust 2015-2, Floating Rate Note, 8/25/55 (144A) 4,966,988 10,369,444 New Residential Mortgage Loan Trust 2017-2 Series 2017-2A Cl A, 4.00%, 3/25/57 (144A) 10,796,819 10,312,883 New Residential Mortgage Loan Trust 2017-2 Series 2017-2A Cl A4, 4.00%, 3/25/57 (144A) 10,714,693 4,563,800 3.31 NRP Mortgage Trust 2013-1, Floating Rate Note, 7/25/43 (144A) 4,386,841 6,427,468 3.25 NRP Mortgage Trust 2013-1, Floating Rate Note, 7/25/43 (144A) 6,432,237 6,024,837 3.31 NRP Mortgage Trust 2013-1, Floating Rate Note, 7/25/43 (144A) 5,833,622 1,353,713 Pepper Residential Securities Trust No 18 Series 18A Cl A1UA, 2.1088%, 3/12/47 1,365,526 5,007,571 3.56 PMT Loan Trust 2013-J1, Floating Rate Note, 9/25/43 (144A) 4,784,620 256,404 RAAC Series 2004-SP2 Trust, 6.0%, 1/25/32 256,309 80,905 RALI Series 2003-QS14 Trust, 5.0%, 7/25/18 80,999 1,307,843 2.77 RESI Finance LP 2003-CB1, Floating Rate Note, 7/9/35 1,206,093 948,349 Resimac Premier Seriesies 2017-1 Series 2017-1A Cl A1A, 2.077%, 9/11/48 (144A) 949,405 50,386 RREF 2015-LT7 LLC, 3.0%, 12/27/32 (144A) 50,386 1,502,358 Sequoia Mortgage Trust 2017-1 Series 2017-1 Cl A4, 3.50% , 2/25/47 (144A) 1,534,084 3,472,536 1.81 Sequoia Mortgage Trust 2012-6, Floating Rate Note, 12/26/42 3,245,749 4,103,028 3.65 Sequoia Mortgage Trust 2013-1, Floating Rate Note, 2/25/43 4,116,266 6,703,845 3.56 Sequoia Mortgage Trust 2013-10, Floating Rate Note, 8/25/43 (144A) 6,672,419 1,985,341 1.87 Sequoia Mortgage Trust 2013-2, Floating Rate Note, 2/25/43 1,901,042 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/17 31 Schedule of Investments | 6/30/17 (continued) ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 6,418,774 2.33 Sequoia Mortgage Trust 2013-4 REMICS, Floating Rate Note, 4/27/43 $ 6,177,296 1,268,983 1.55 Sequoia Mortgage Trust 2013-4, Floating Rate Note, 4/27/43 1,234,506 5,979,557 3.49 Sequoia Mortgage Trust 2013-4, Floating Rate Note, 4/27/43 5,965,364 5,708,758 2.50 Sequoia Mortgage Trust 2013-5 REMICS, Floating Rate Note, 5/25/43 (144A) 5,538,611 9,402,963 3.00 Sequoia Mortgage Trust 2013-5 REMICS, Floating Rate Note, 5/25/43 (144A) 9,364,604 7,109,572 2.50 Sequoia Mortgage Trust 2013-6, Floating Rate Note, 5/26/43 6,900,338 9,699,392 2.50 Sequoia Mortgage Trust 2013-7, Floating Rate Note, 6/25/43 9,213,171 3,088,787 3.00 Sequoia Mortgage Trust 2013-7, Floating Rate Note, 6/25/43 3,053,677 405,198 2.25 Sequoia Mortgage Trust 2013-8, Floating Rate Note, 6/25/43 390,367 9,502,897 3.00 Sequoia Mortgage Trust 2013-8, Floating Rate Note, 6/25/43 9,377,174 1,309,677 Sequoia Mortgage Trust 2013-9, 3.5%, 7/27/43 (144A) 1,307,477 666,605 Sequoia Mortgage Trust 2013-9, 3.5%, 7/27/43 (144A) 663,695 4,612,529 3.00 Sequoia Mortgage Trust 2015-1, Floating Rate Note, 1/25/45 (144A) 4,519,624 8,286,591 3.50 Sequoia Mortgage Trust 2015-2, Floating Rate Note, 5/25/45 (144A) 8,376,252 3,775,366 3.72 Sequoia Mortgage Trust 2015-3, Floating Rate Note, 7/25/45 (144A) 3,598,018 9,304,923 3.00 Sequoia Mortgage Trust 2015-4, Floating Rate Note, 11/25/30 (144A) 9,387,067 4,804,367 3.50 Sequoia Mortgage Trust 2016-2, Floating Rate Note, 8/25/46 (144A) 4,800,178 3,907,995 3.77 Sequoia Mortgage Trust 2016-2, Floating Rate Note, 8/25/46 (144A) 3,788,863 10,401,577 3.50 Sequoia Mortgage Trust 2017-2, Floating Rate Note, 3/25/47 (144A) 10,641,541 8,228,710 Sequoia Mortgage Trust 2017-3 Series 2017-3 Cl A1, 3.50% , 4/25/47 (144A) 8,318,063 3,560,000 Sequoia Mortgage Trust 2017-4 Series 2017-4 Cl A4 3.50%, 7/25/47 (144A) 3,635,080 3,288,464 3.50 Sequoia Mortgage Trust, Floating Rate Note, 9/25/42 3,329,800 291,779 Shellpoint Co-Originator Trust 2016-1 Series 2016-1 Cl 1A10, 3.50%, 11/25/46 (144A) 296,873 6,853,272 3.00 Shellpoint Co-Originator Trust 2016-1, Floating Rate Note, 10/25/31 (144A) 6,894,498 The accompanying notes are an integral part of these financial statements. 32 Pioneer Bond Fund | Annual Report | 6/30/17 ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 7,018,349 Shellpoint Co-Originator Trust 2017-1 Series 2017-1 Cl A1, 3.50% , 4/25/47 (144A) $ 7,097,046 3,087,421 3.00 Sofi Mortgage Trust 2016-1, Floating Rate Note, 11/25/46 (144A) 3,011,322 420,490 1.32 Structured Asset Securities Corp. Trust 2005-14, Floating Rate Note, 7/25/35 335,189 1,669,158 3.65 Velocity Commercial Capital Loan Trust 2015-1, Floating Rate Note, 6/25/45 (144A) 1,680,604 1,015,053 Wells Fargo Commercial Mortgage Trust 2010-C1, 3.349%, 11/18/43 (144A) 1,034,660 4,500,000 Wells Fargo Commercial Mortgage Trust 2014-LC16 REMICS, 3.477%, 8/15/50 4,699,730 5,300,000 2.84 Wells Fargo Commercial Mortgage Trust 2014-TISH REMICS, Floating Rate Note, 2/15/27 (144A) 5,309,517 3,810,000 Wells Fargo Commercial Mortgage Trust 2015-NXS3, 3.617%, 9/17/57 3,943,516 891,640 3.97 Wells Fargo Credit Risk Transfer Securities Trust 2015, Floating Rate Note, 11/25/25 (144A) 895,351 1,710,864 4.07 Wells Fargo Credit Risk Transfer Securities Trust 2015, Floating Rate Note, 11/25/25 (144A) 1,719,307 3,900,000 4.49 WFRBS Commercial Mortgage Trust 2013-C12, Floating Rate Note, 3/15/48 (144A) 3,630,535 6,200,000 WFRBS Commercial Mortgage Trust 2013-C16, 4.136%, 9/17/46 6,651,158 8,341,850 3.91 WinWater Mortgage Loan Trust 2015-2, Floating Rate Note, 2/20/45 (144A) 7,890,951 4,617,338 3.50 WinWater Mortgage Loan Trust 2015-3 REMICS, Floating Rate Note, 3/20/45 (144A) 4,667,298 8,454,695 3.50 WinWater Mortgage Loan Trust 2015-4, Floating Rate Note, 6/20/45 (144A) 8,585,806 6,229,286 3.50 WinWater Mortgage Loan Trust 2015-5, Floating Rate Note, 8/20/45 (144A) 6,244,127 4,744,011 3.80 WinWater Mortgage Loan Trust 2015-5, Floating Rate Note, 8/20/45 (144A) 4,760,708 4,500,182 3.80 WinWater Mortgage Loan Trust 2015-5, Floating Rate Note, 8/20/45 (144A) 4,230,129 1,000,358 Winwater Mortgage Loan Trust 2015-A Series 2015-A Cl A5 3.50%, 6/20/45 (144A) 1,018,333 3,570,920 3.50 WinWater Mortgage Loan Trust 2016-1, Floating Rate Note, 1/22/46 (144A) 3,614,021 -------------- $ 828,449,540 -------------- Total Banks $ 828,449,540 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/17 33 Schedule of Investments | 6/30/17 (continued) ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 0.0%+ Specialized Finance -- 0.0%+ 1,980,000 2.99 BAMLL Commercial Mortgage Securities Trust 2015-ASHF REMICS, Floating Rate Note, 1/15/28 (144A) $ 1,986,011 -------------- Total Diversified Financials $ 1,986,011 ---------------------------------------------------------------------------------------------------- GOVERNMENT -- 0.9% 63,333 1.39 Federal Home Loan Mortgage Corp. REMICS, Floating Rate Note, 12/15/20 $ 63,608 693,590 3.62 Federal National Mortgage Association 2004-T2, Floating Rate Note, 7/25/43 734,226 748 Federal National Mortgage Association REMICS, 10.3%, 4/25/19 783 1,309,280 Federal National Mortgage Association REMICS, 3.0%, 6/25/23 1,341,011 402,859 Federal National Mortgage Association REMICS, 4.5%, 6/25/29 428,408 7,714,886 Freddie Mac Whole Loan Securities Trust 2015-SC01, 3.5%, 5/25/45 7,763,528 890,000 5.37 FREMF Mortgage Trust 2010-K9 REMICS, Floating Rate Note, 9/25/45 (144A) 963,143 1,250,000 5.05 FREMF Mortgage Trust 2011-K703, Floating Rate Note, 7/25/44 (144A) 1,278,416 2,221,785 5.06 FREMF Mortgage Trust 2014-KF05 REMICS, Floating Rate Note, 9/25/21 (144A) 2,242,361 3,771,758 3.57 FREMF Mortgage Trust 2014-KS02 REMICS, Floating Rate Note, 8/25/23 (144A) 3,757,727 2,010,000 3.94 FREMF Mortgage Trust Class B, Floating Rate Note, 6/25/47 (144A) 2,065,831 772,834 Government National Mortgage Association REMICS, 3.25%, 4/16/27 795,473 953,879 Government National Mortgage Association, 3.0%, 4/20/41 972,866 975,835 Government National Mortgage Association, 5.25%, 8/16/35 1,071,245 69,987,088 0.80 Government National Mortgage Association, Floating Rate Note, 10/16/58 (h) 5,906,665 12,158,904 Seasoned Credit Risk Transfer Trust Series 2016-1, 3.0%, 9/25/55 12,186,434 364,403 Vendee Mortgage Trust 2008-1, 5.25%, 1/15/32 385,971 671,225 Vendee Mortgage Trust 2010-1, 4.25%, 2/15/35 688,341 -------------- $ 42,646,037 -------------- Total Government $ 42,646,037 ---------------------------------------------------------------------------------------------------- TOTAL COLLATERALIZED MORTGAGE OBLIGATIONS (Cost $879,554,236) $ 873,081,588 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 34 Pioneer Bond Fund | Annual Report | 6/30/17 ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- CORPORATE BONDS -- 33.9% ENERGY -- 4.3% Oil & Gas Drilling -- 0.2% 1,850,000 Freeport-McMoRan, Inc., 3.875%, 3/15/23 $ 1,720,500 1,650,000 Freeport-McMoRan, Inc., 4.55%, 11/14/24 1,555,125 6,185,000 Rowan Companies, Inc., 4.75%, 1/15/24 5,257,250 3,605,000 Rowan Companies, Inc., 5.85%, 1/15/44 2,676,712 -------------- $ 11,209,587 ---------------------------------------------------------------------------------------------------- Oil & Gas Equipment & Services -- 0.1% 2,250,000 Halliburton Co., 7.6%, 8/15/96 (144A) $ 2,919,964 ---------------------------------------------------------------------------------------------------- Integrated Oil & Gas -- 0.7% 6,360,000 BP Capital Markets Plc, 3.062%, 3/17/22 $ 6,500,995 5,965,000 Petroleos Mexicanos, 3.5%, 1/30/23 5,717,452 3,525,000 Petroleos Mexicanos, 6.5%, 3/13/27 (144A) 3,786,731 4,750,000 Sinopec Group Overseas Development 2014, Ltd., 4.375%, 4/10/24 (144A) 5,051,046 10,050,000 Sinopec Group Overseas Development 2015, Ltd., 2.5%, 4/28/20 (144A) 10,097,322 -------------- $ 31,153,546 ---------------------------------------------------------------------------------------------------- Oil & Gas Exploration & Production -- 0.4% 6,585,000 Canadian Natural Resources, Ltd., 6.25%, 3/15/38 $ 7,675,002 2,830,000 Canadian Natural Resources, Ltd., 6.75%, 2/1/39 3,372,053 5,275,000 CNOOC Nexen Finance 2014 ULC, 4.25%, 4/30/24 5,550,471 1,400,000 Newfield Exploration Co., 5.625%, 7/1/24 1,459,500 -------------- $ 18,057,026 ---------------------------------------------------------------------------------------------------- Oil & Gas Refining & Marketing -- 0.4% 5,827,000 EnLink Midstream Partners LP, 4.4%, 4/1/24 $ 5,915,565 1,800,000 EnLink Midstream Partners LP, 4.85%, 7/15/26 1,872,752 3,800,000 Motiva Enterprises LLC, 6.85%, 1/15/40 (144A) 4,588,272 4,655,000 Valero Energy Corp., 6.625%, 6/15/37 5,749,390 2,890,000 Valero Energy Corp., 9.375%, 3/15/19 3,234,107 -------------- $ 21,360,086 ---------------------------------------------------------------------------------------------------- Oil & Gas Storage & Transportation -- 2.5% 10,945,000 Boardwalk Pipelines LP, 4.95%, 12/15/24 $ 11,594,925 2,575,000 Boardwalk Pipelines LP, 5.95%, 6/1/26 2,867,296 2,900,000 DCP Midstream Operating LP, 9.75%, 3/15/19 (144A) 3,240,750 8,250,000 Enable Midstream Partner, 3.90%, 5/15/24 8,181,393 8,585,000 Enbridge Energy Partners LP, 7.375%, 10/15/45 10,933,229 3,275,000 Energy Transfer Equity LP, 5.875%, 1/15/24 3,471,500 4,675,000 Kinder Morgan Energy Partners LP, 4.25%, 9/1/24 4,830,360 8,235,000 Kinder Morgan, Inc. Delaware, 5.05%, 2/15/46 8,269,620 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/17 35 Schedule of Investments | 6/30/17 (continued) ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- Oil & Gas Storage & Transportation -- (continued) 7,335,000 Kinder Morgan, Inc. Delaware, 5.55%, 6/1/45 $ 7,773,083 3,875,000 MPLX LP, 4.875%, 12/1/24 4,131,393 3,045,000 MPLX LP, 4.875%, 6/1/25 3,228,912 3,875,000 MPLX LP, 5.5%, 2/15/23 3,978,734 9,165,000 Plains All American Pipeline LP, 4.65%, 10/15/25 9,394,033 5,300,000 Plains All American Pipeline LP, 4.7%, 6/15/44 4,831,167 10,675,000 Sabine Pass Liquefaction LLC, 5.00%, 3/15/27 11,363,239 2,475,000 Spectra Energy Capital LLC, 6.2%, 4/15/18 2,554,789 1,500,000 Spectra Energy Capital LLC, 6.75%, 7/15/18 1,566,093 786,000 Sunoco Logistics Partners Operations LP, 6.1%, 2/15/42 825,872 2,475,000 The Williams Companies, Inc., 7.75%, 6/15/31 2,945,250 5,115,000 TransCanada PipeLines, Ltd., 1.875%, 1/12/18 5,121,849 8,230,000 Williams Partners LP, 5.1%, 9/15/45 8,526,296 -------------- $ 119,629,783 -------------- Total Energy $ 204,329,992 ---------------------------------------------------------------------------------------------------- MATERIALS -- 1.2% Commodity Chemicals -- 0.1% 2,890,000 Nova Chemicals Corp., 4.875%, 6/1/24 (144A) $ 2,879,162 ---------------------------------------------------------------------------------------------------- Diversified Chemicals -- 0.2% 10,255,000 CF Industries, Inc., 5.375%, 3/15/44 $ 9,152,588 ---------------------------------------------------------------------------------------------------- Fertilizers & Agricultural Chemicals -- 0.3% 2,800,000 Agrium, Inc., 4.125%, 3/15/35 $ 2,786,400 10,800,000 Agrium, Inc., 5.25%, 1/15/45 12,260,743 -------------- $ 15,047,143 ---------------------------------------------------------------------------------------------------- Construction Materials -- 0.2% 10,600,000 CRH America, Inc., 3.875%, 5/18/25 (144A) $ 11,015,743 ---------------------------------------------------------------------------------------------------- Metal & Glass Containers -- 0.1% 4,650,000 Crown America, 4.25%, 9/30/26 (144A) $ 4,638,375 ---------------------------------------------------------------------------------------------------- Paper Packaging -- 0.1% 1,275,000 International Paper Co., 4.80%, 6/15/44 $ 1,360,960 2,575,000 International Paper Co., 6.0%, 11/15/41 3,140,205 -------------- $ 4,501,165 ---------------------------------------------------------------------------------------------------- Steel -- 0.1% 3,550,000 Commercial Metals Co., 4.875%, 5/15/23 $ 3,589,938 -------------- Total Materials $ 50,824,114 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 36 Pioneer Bond Fund | Annual Report | 6/30/17 ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- CAPITAL GOODS -- 2.2% Aerospace & Defense -- 1.3% 3,625,000 Embraer Netherlands Finance BV, 5.4%, 2/1/27 $ 3,788,125 7,472,000 L3 Technologies, Inc., 3.95%, 5/28/24 7,682,875 11,310,000 Lockheed Martin Corp., 3.1%, 1/15/23 11,571,182 4,825,000 Meccanica Holdings USA, Inc., 6.25%, 1/15/40 (144A) 5,404,000 13,470,000 Rockwell Collins Inc., 3.20%, 3/15/24 13,653,892 7,855,000 Spirit AeroSystems, Inc., 3.85%, 6/15/26 7,929,159 10,344,000 United Technologies Corp., 1.778%, 5/4/18 (Step) 10,357,271 -------------- $ 60,386,504 ---------------------------------------------------------------------------------------------------- Building Products -- 0.6% 7,680,000 Fortune Brands Home & Security, Inc., 3.0%, 6/15/20 $ 7,777,528 5,500,000 Masco Corp., 4.375%, 4/1/26 5,866,850 1,050,000 Masco Corp., 4.45%, 4/1/25 1,121,505 626,000 Masco Corp., 5.95%, 3/15/22 706,656 5,675,000 Owens Corning, 3.4%, 8/15/26 5,590,465 5,150,000 Owens Corning, 4.2%, 12/1/24 5,392,488 4,385,000 Standard Industries Inc., 5.50%, 2/15/23 (144A) 4,626,175 -------------- $ 31,081,667 ---------------------------------------------------------------------------------------------------- Construction & Engineering -- 0.1% 1,368,000 Amsted Industries, Inc., 5.0%, 3/15/22 (144A) $ 1,412,460 1,375,000 Amsted Industries, Inc., 5.375%, 9/15/24 (144A) 1,423,125 -------------- $ 2,835,585 ---------------------------------------------------------------------------------------------------- Industrial Conglomerates -- 0.1% 1,392,000 General Electric Co., 5.3%, 2/11/21 $ 1,539,403 2,950,000 Tyco Electronics Group SA, 6.55%, 10/1/17 2,984,949 -------------- $ 4,524,352 ---------------------------------------------------------------------------------------------------- Trading Companies & Distributors -- 0.1% 5,660,000 GATX Corp., 6.0%, 2/15/18 $ 5,804,443 -------------- Total Capital Goods $ 104,632,551 ---------------------------------------------------------------------------------------------------- COMMERCIAL SERVICES & SUPPLIES -- 0.2% Environmental & Facilities Services -- 0.1% 2,678,000 Republic Services, Inc., 2.9%, 7/1/26 $ 2,625,567 ---------------------------------------------------------------------------------------------------- Research & Consulting Services -- 0.1% 5,942,000 Verisk Analytics, Inc., 5.5%, 6/15/45 $ 6,601,550 -------------- Total Commercial Services & Supplies $ 9,227,117 ---------------------------------------------------------------------------------------------------- TRANSPORTATION -- 1.1% Airlines -- 0.1% 2,475,000 Delta Air Lines, Inc., 2.875%, 3/13/20 $ 2,507,362 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/17 37 Schedule of Investments | 6/30/17 (continued) ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- Railroads -- 0.8% 14,485,000 Burlington Northern Santa Fe LLC, 4.15%, 4/1/45 $ 15,141,460 6,650,000 TTX Co., 3.6%, 1/15/25 (144A) 6,696,776 3,250,000 TTX Co., 4.2%, 7/1/46 (144A) 3,250,611 13,215,000 Union Pacific Corp., 3.375%, 2/1/35 13,069,146 -------------- $ 38,157,993 ---------------------------------------------------------------------------------------------------- Highways & Railtracks -- 0.2% 3,950,000 ERAC USA Finance LLC, 3.3%, 12/1/26 (144A) $ 3,845,996 1,300,000 ERAC USA Finance LLC, 3.8%, 11/1/25 (144A) 1,325,113 4,600,000 ERAC USA Finance LLC, 4.5%, 2/15/45 (144A) 4,534,261 -------------- $ 9,705,370 -------------- Total Transportation $ 50,370,725 ---------------------------------------------------------------------------------------------------- AUTOMOBILES & COMPONENTS -- 0.6% Automobile Manufacturers -- 0.6% 4,975,000 Ford Motor Credit Co., LLC, 2.24%, 6/15/18 $ 4,987,114 6,425,000 Ford Motor Credit Co., LLC, 3.219%, 1/9/22 6,482,118 8,230,000 Ford Motor Credit Co., LLC, 4.389%, 1/8/26 8,477,336 10,045,000 Toyota Motor Credit Corp., 2.125%, 7/18/19 10,114,712 -------------- $ 30,061,280 -------------- Total Automobiles & Components $ 30,061,280 ---------------------------------------------------------------------------------------------------- CONSUMER DURABLES & APPAREL -- 0.1% Homebuilding -- 0.1% 5,120,000 Lennar Corp., 4.75%, 4/1/21 $ 5,427,200 -------------- Total Consumer Durables & Apparel $ 5,427,200 ---------------------------------------------------------------------------------------------------- CONSUMER SERVICES -- 0.2% Education Services -- 0.2% 1,100,000 Massachusetts Institute of Technology, 5.6%, 7/1/11 $ 1,436,919 2,600,000 President & Fellows of Harvard College, 2.3%, 10/1/23 2,585,396 3,550,000 Tufts University, 5.017%, 4/15/12 3,650,461 -------------- $ 7,672,776 -------------- Total Consumer Services $ 7,672,776 ---------------------------------------------------------------------------------------------------- MEDIA -- 0.8% Cable & Satellite -- 0.8% 8,845,000 Charter Communications Operating LLC, 6.384%, 10/23/35 $ 10,484,447 10,310,000 Comcast Corp., 5.65%, 6/15/35 12,634,390 11,875,000 Cox Communications Inc., 3.35%, 9/15/26 (144A) 11,660,609 650,000 Time Warner Cable LLC, 6.55%, 5/1/37 776,175 3,450,000 Videotron, Ltd., 5.375%, 6/15/24 (144A) 3,644,062 -------------- $ 39,199,683 -------------- Total Media $ 39,199,683 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 38 Pioneer Bond Fund | Annual Report | 6/30/17 ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- RETAILING -- 0.6% Internet Retail -- 0.4% 5,900,000 Expedia, Inc., 4.5%, 8/15/24 $ 6,208,859 950,000 Expedia, Inc., 5.0%, 2/15/26 1,040,208 3,800,000 Expedia, Inc., 5.95%, 8/15/20 4,152,610 1,925,000 The Priceline Group, Inc., 3.6%, 6/1/26 1,948,610 7,375,000 The Priceline Group, Inc., 3.65%, 3/15/25 7,567,967 -------------- $ 20,918,254 ---------------------------------------------------------------------------------------------------- Home Improvement Retail -- 0.1% 4,520,000 The Home Depot, Inc., 2.625%, 6/1/22 $ 4,588,333 ---------------------------------------------------------------------------------------------------- Automotive Retail -- 0.1% 3,994,000 AutoZone, Inc., 2.5%, 4/15/21 $ 3,983,572 -------------- Total Retailing $ 29,490,159 ---------------------------------------------------------------------------------------------------- FOOD & STAPLES RETAILING -- 0.2% Drug Retail -- 0.2% 650,000 CVS Health Corp., 2.25%, 8/12/19 $ 653,925 559,867 CVS Pass-Through Trust, 5.298%, 1/11/27 (144A) 604,041 2,741,942 CVS Pass-Through Trust, 5.773%, 1/10/33 (144A) 3,115,666 1,880,296 CVS Pass-Through Trust, 5.926%, 1/10/34 (144A) 2,155,560 3,628,502 CVS Pass-Through Trust, 6.036%, 12/10/28 4,093,129 -------------- $ 10,622,321 -------------- Total Food & Staples Retailing $ 10,622,321 ---------------------------------------------------------------------------------------------------- FOOD, BEVERAGE & TOBACCO -- 1.3% Brewers -- 0.1% 4,350,000 2.29 Anheuser-Busch InBev Finance, Inc., Floating Rate Note, 2/1/21 $ 4,505,151 ---------------------------------------------------------------------------------------------------- Distillers & Vintners -- 0.4% 8,525,000 Constellation Brands, Inc., 3.7%, 12/6/26 $ 8,676,072 5,300,000 Pernod Ricard SA, 3.25%, 6/8/26 (144A) 5,300,228 4,277,000 Pernod Ricard SA, 4.45%, 1/15/22 (144A) 4,585,722 -------------- $ 18,562,022 ---------------------------------------------------------------------------------------------------- Packaged Foods & Meats -- 0.5% 5,687,000 Kraft Heinz Foods Co., 3.5%, 6/6/22 $ 5,875,808 4,353,000 Kraft Heinz Foods Co., 3.95%, 7/15/25 4,476,059 4,119,000 Mondelez International Holdings Co., 2.00%, 10/28/21 (144A) 4,013,216 6,375,000 Smithfield Foods, Inc., 2.7%, 1/31/20 (144A) 6,408,611 3,075,000 Tyson Foods Inc., 1.76%, 6/2/20 3,088,917 -------------- $ 23,862,611 ---------------------------------------------------------------------------------------------------- Tobacco -- 0.3% 14,708,000 Reynolds American, Inc., 4.45%, 6/12/25 $ 15,757,416 -------------- Total Food, Beverage & Tobacco $ 62,687,200 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/17 39 Schedule of Investments | 6/30/17 (continued) ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- HEALTH CARE EQUIPMENT & SERVICES -- 0.6% Health Care Equipment -- 0.2% 8,016,000 Becton Dickinson and Co., 3.734%, 12/15/24 $ 8,147,350 ---------------------------------------------------------------------------------------------------- Health Care Distributors -- 0.2% 8,000,000 Cardinal Health, Inc., 3.079% , 6/15/24 $ 8,019,296 ---------------------------------------------------------------------------------------------------- Health Care Facilities -- 0.0%+ 2,400,000 NYU Hospitals Center, 4.428%, 7/1/42 $ 2,472,374 ---------------------------------------------------------------------------------------------------- Managed Health Care -- 0.2% 3,630,000 Humana Inc., 3.95%, 3/15/27 $ 3,783,026 4,155,000 Molina Healthcare, Inc., 5.375%, 11/15/22 4,399,106 -------------- $ 8,182,132 -------------- Total Health Care Equipment & Services $ 26,821,152 ---------------------------------------------------------------------------------------------------- PHARMACEUTICALS, BIOTECHNOLOGY & LIFE SCIENCES -- 2.0% Biotechnology -- 1.0% 925,000 AbbVie, Inc., 2.85%, 5/14/23 $ 922,935 1,370,000 AbbVie, Inc., 3.2%, 5/14/26 1,353,822 12,760,000 AbbVie, Inc., 3.6%, 5/14/25 13,016,017 8,035,000 Amgen, Inc., 4.4%, 5/1/45 8,253,142 2,350,000 Amgen, Inc., 5.375%, 5/15/43 2,661,015 12,900,000 Baxalta, Inc., 3.6%, 6/23/22 13,358,363 3,550,000 Biogen, Inc., 3.625%, 9/15/22 3,712,803 4,275,000 Biogen, Inc., 4.05%, 9/15/25 4,513,498 -------------- $ 47,791,595 ---------------------------------------------------------------------------------------------------- Pharmaceuticals -- 0.7% 3,150,000 Johnson & Johnson, 4.375%, 12/5/33 $ 3,582,652 11,155,000 Mylan NV, 3.95%, 6/15/26 11,302,681 1,391,000 Perrigo Finance Unlimited Co., 3.5%, 3/15/21 1,437,012 4,570,000 Perrigo Finance Unlimited Co., 3.9%, 12/15/24 4,640,314 2,481,000 Perrigo Finance Unlimited Co., 4.375%, 3/15/26 2,558,764 10,140,000 Teva Pharmaceutical Finance Netherlands III BV, 2.8%, 7/21/23 9,862,620 -------------- $ 33,384,043 ---------------------------------------------------------------------------------------------------- Life Sciences Tools & Services -- 0.3% 894,000 Agilent Technologies, Inc., 6.5%, 11/1/17 $ 906,840 11,200,000 Thermo Fisher Scientific, Inc., 3.0%, 4/15/23 11,290,922 -------------- $ 12,197,762 -------------- Total Pharmaceuticals, Biotechnology & Life Sciences $ 93,373,400 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 40 Pioneer Bond Fund | Annual Report | 6/30/17 ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- BANKS -- 3.8% Diversified Banks -- 3.4% 6,485,000 Australia & New Zealand Banking Group, Ltd., 4.5%, 3/19/24 (144A) $ 6,774,289 4,600,000 9.00 Banco Bilbao Vizcaya Argentaria SA, Floating Rate Note (Perpetual) 4,806,945 1,150,000 Bank of America Corp., 4.2%, 8/26/24 1,193,820 3,950,000 6.10 Bank of America Corp., Floating Rate Note (Perpetual) 4,291,082 4,450,000 Banque Ouest Africaine de Developpement, 5.5%, 5/6/21 (144A) 4,715,487 2,565,000 Barclays Bank Plc, 6.05%, 12/4/17 (144A) 2,609,018 5,250,000 Barclays Plc, 3.65%, 3/16/25 5,223,902 3,000,000 Barclays Plc, 4.375%, 1/12/26 3,117,348 1,200,000 BBVA Bancomer SA Texas, 4.375%, 4/10/24 (144A) 1,245,600 1,915,000 BBVA Bancomer SA Texas, 6.5%, 3/10/21 (144A) 2,108,894 17,005,000 7.62 BNP Paribas SA, Floating Rate Note (Perpetual) (144A) 18,705,500 3,860,000 BPCE SA, 4.875%, 4/1/26 (144A) 4,075,870 11,776,000 6.25 Citigroup, Inc., Floating Rate Note (Perpetual) 13,064,000 1,985,000 5.90 Citigroup, Inc., Floating Rate Note (Perpetual) 2,124,446 3,435,000 Cooperatieve Rabobank UA, 3.875%, 2/8/22 3,644,147 6,425,000 Cooperatieve Rabobank UA, 3.95%, 11/9/22 6,710,347 11,200,000 Credit Suisse Group Funding Guernsey, Ltd., 3.8%, 9/15/22 11,636,587 3,416,000 Danske Bank, 6.125%, 12/31/49 3,569,720 1,305,000 HSBC Bank Plc, 7.65%, 5/1/25 1,618,864 4,525,000 6.88 HSBC Holdings Plc, Floating Rate Note (Perpetual) 4,887,000 11,106,000 6.50 ING Groep NV, Floating Rate Note, 12/29/49 11,670,185 2,749,000 JPMorgan Chase & Co., 5.625%, 8/16/43 3,302,632 5,125,000 Macquarie Bank, Ltd., 4.875%, 6/10/25 (144A) 5,397,537 840,000 Macquarie Bank, Ltd., 6.625%, 4/7/21 (144A) 946,622 4,500,000 Nordea Bank AB, 4.25%, 9/21/22 (144A) 4,772,115 5,600,000 6.12 Nordea Bank AB, Floating Rate Note (Perpetual) (144A) 5,852,000 10,505,000 8.62 Royal Bank of Scotland Group Plc, Floating Rate Note (Perpetual) 11,450,450 2,600,000 4.50 Scotiabank Peru SAA, Floating Rate Note, 12/13/27 (144A) 2,664,610 2,400,000 7.38 Societe Generale SA, Floating Rate Note (Perpetual) (144A) 2,580,000 4,800,000 Standard Chartered Plc, 3.95%, 1/11/23 (144A) 4,840,901 2,250,000 Turkiye Garanti Bankasi, 6.125%, 5/24/27 (144A) 2,227,347 3,540,000 Wells Fargo Bank NA, 6.0%, 11/15/17 3,596,010 -------------- $ 165,423,275 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/17 41 Schedule of Investments | 6/30/17 (continued) ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- Regional Banks -- 0.4% 7,000,000 Credit Suisse AG New York NY, 1.75%, 1/29/18 $ 7,003,787 7,378,000 KeyCorp, 5.1%, 3/24/21 8,072,550 1,435,000 PNC Bank NA, 6.0%, 12/7/17 1,461,052 -------------- $ 16,537,389 -------------- Total Banks $ 181,960,664 ---------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 3.0% Other Diversified Financial Services -- 0.0%+ 1,250,000 0.00 Tiers Trust, Floating Rate Note, 10/15/97 (144A) (d) $ 1,547,747 ---------------------------------------------------------------------------------------------------- Specialized Finance -- 0.7% 2,980,000 Cantor Fitzgerald LP, 7.875%, 10/15/19 (144A) $ 3,281,132 13,250,000 2.75 Mass Mutual Global Funding, Inc., 2.75%, 6/22/24 (144A) 13,152,109 2,000,000 National Rural Utilities Cooperative Finance Corp., 5.45%, 2/1/18 2,043,650 11,625,000 USAA Capital Corp., 2.45%, 8/1/20 (144A) 11,728,358 -------------- $ 30,205,249 ---------------------------------------------------------------------------------------------------- Consumer Finance -- 0.9% 2,250,000 Ally Financial, Inc., 4.625%, 3/30/25 $ 2,304,405 5,050,000 Ally Financial, Inc., 5.125%, 9/30/24 5,327,346 7,695,000 American Honda Finance Corp., 1.2%, 7/14/17 7,694,638 1,465,000 Capital One Bank USA NA, 8.8%, 7/15/19 1,644,903 7,275,000 Capital One Financial Corp., 3.75%, 4/24/24 7,433,821 2,300,000 General Motors Financial Co., Inc., 3.7%, 11/24/20 2,379,741 10,710,000 General Motors Financial Co., Inc., 4.0%, 1/15/25 10,755,550 6,200,000 Hyundai Capital America, 2.0%, 3/19/18 (144A) 6,204,173 -------------- $ 43,744,577 ---------------------------------------------------------------------------------------------------- Asset Management & Custody Banks -- 0.5% 1,725,000 Blackstone Holdings Finance Co., LLC, 5.0%, 6/15/44 (144A) $ 1,876,665 6,445,000 Blackstone Holdings Finance Co., LLC, 6.25%, 8/15/42 (144A) 8,027,860 2,400,000 Legg Mason, Inc., 3.95%, 7/15/24 2,434,901 2,175,000 Legg Mason, Inc., 4.75%, 3/15/26 2,298,103 10,345,000 2.22 The Bank of New York Mellon Corp., Floating Rate Note, 10/30/23 10,577,711 -------------- $ 25,215,240 ---------------------------------------------------------------------------------------------------- Investment Banking & Brokerage -- 0.4% 5,450,000 Morgan Stanley, 4.1%, 5/22/23 $ 5,689,582 300,000 Morgan Stanley, 4.875%, 11/1/22 325,724 643,000 North American Development Bank, 2.3%, 10/10/18 647,050 The accompanying notes are an integral part of these financial statements. 42 Pioneer Bond Fund | Annual Report | 6/30/17 ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- Investment Banking & Brokerage -- (continued) 6,200,000 TD Ameritrade Holding Co., 3.30%, 4/1/27 $ 6,192,194 4,400,000 UBS AG, 7.625%, 8/17/22 5,165,600 -------------- $ 18,020,150 ---------------------------------------------------------------------------------------------------- Diversified Capital Markets -- 0.5% 4,115,000 Credit Suisse Group AG, 7.125%, 7/29/65 $ 4,425,682 4,031,000 GE Capital International Funding Co Unlimited Co., 2.342%, 11/15/20 4,063,228 6,900,000 2.85 ICBCIL Finance Co., Ltd., Floating Rate Note, 11/13/18 (144A) 6,960,368 2,730,000 Macquarie Group, Ltd., 6.0%, 1/14/20 (144A) 2,965,705 2,355,000 UBS Group AG, 7.125% , 8/1/65 2,541,045 -------------- $ 20,956,028 -------------- Total Diversified Financials $ 139,688,991 ---------------------------------------------------------------------------------------------------- INSURANCE -- 4.5% Insurance Brokers -- 0.2% 10,625,000 Brown & Brown, Inc., 4.2%, 9/15/24 $ 11,146,209 ---------------------------------------------------------------------------------------------------- Life & Health Insurance -- 0.8% 7,000,000 Aflac, Inc., 3.625%, 11/15/24 $ 7,330,428 800,000 AIG Global Funding, 7/2/20 (144A) (c) 800,944 2,425,000 Principal Life Global Funding II, 1.5%, 4/18/19 (144A) 2,402,632 4,250,000 Protective Life Corp., 7.375%, 10/15/19 4,732,060 1,090,000 Prudential Financial, Inc., 4.5%, 11/16/21 1,182,235 1,500,000 5.62 Prudential Financial, Inc., Floating Rate Note, 6/15/43 1,648,125 8,043,000 5.88 Prudential Financial, Inc., Floating Rate Note, 9/15/42 8,961,511 690,000 Teachers Insurance & Annuity Association of America, 6.85%, 12/16/39 (144A) 944,820 3,950,000 Teachers Insurance & Annuity, 4.27%, 5/15/47 (144A) 4,043,651 4,120,000 Teachers Insurance & Annuity, 4.90%, 9/15/44 (144A) 4,611,442 -------------- $ 36,657,848 ---------------------------------------------------------------------------------------------------- Multi-line Insurance -- 0.3% 5,985,000 AIG, 3.875%, 1/15/35 $ 5,802,230 2,335,000 AXA SA, 8.6%, 12/15/30 3,292,350 5,325,000 Liberty Mutual Insurance Co., 7.697% (Perpetual) (144A) 7,507,957 -------------- $ 16,602,537 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/17 43 Schedule of Investments | 6/30/17 (continued) ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- Property & Casualty Insurance -- 0.2% 9,100,000 CNA Financial Corp., 4.5%, 3/1/26 $ 9,762,753 1,850,000 Delphi Financial Group, Inc., 7.875%, 1/31/20 2,077,050 -------------- $ 11,839,803 ---------------------------------------------------------------------------------------------------- Reinsurance -- 3.0% 1,350,000 Ailsa 2017 Segregated Account (Artex SAC Ltd.), 6/15/18 (e)(f) $ 1,288,035 1,700,000 0.50 Alamo Re, Ltd., Floating Rate Note, 6/8/20 (Cat Bond) (144A) 1,702,040 2,750,000 6.13 Alamo Re, Ltd., Floating Rate Note, 6/7/18 (Cat Bond) (144A) 2,788,225 500,000 3.36 Aozora Re, Ltd., Floating Rate Note, 4/7/23 (Cat Bond) (144A) 507,500 900,000 Arlington Segregated Account (Artex SAC Ltd.), Variable Rate Notes, 8/31/16 (e)(f) 43,740 750,000 Arlington Segregated Account (Artex SAC Ltd.), Variable Rate Notes, 8/31/17 (e)(f) 97,875 2,000,000 Berwick Segregated Account (Artex SAC Ltd.), Variable Rate Notes, 2/1/19 (e)(f) 2,060,400 500,000 4.34 Atlas IX Capital DAC, Floating Rate Note, 1/17/19 (Cat Bond) (144A) 508,300 2,000,000 Berwick 2016-1 Segregated Account (Artex SAC Ltd.), Variable Rate Notes, 2/1/18 (e)(f) 95,000 800,000 Berwick Segregated Account (Artex SAC Ltd.), Variable Rate Note, 1/22/16 (e)(f) 24,000 1,350,000 5.85 Caelus Re IV, Ltd., Floating Rate Note, 3/6/20 (Cat Bond) (144A) 1,406,835 750,000 0.05 Caelus Re IV, Ltd., Floating Rate Note, 6/5/20 (Cat Bond) (144A) 750,300 1,000,000 0.50 Caelus Re IV, Ltd., Floating Rate Note, 6/5/20 (Cat Bond) (144A) 1,004,600 3,600,000 Carnoustie 2016-N,Segregated Account (Artex SAC Ltd.), Variable Rate Notes, 11/30/20 (e)(f) 389,520 3,000,000 Carnoustie Segregated Account (Artex SAC Ltd.), Variable Rate Notes, 2/19/16 (e)(f) 61,200 4,500,000 Carnoustie Segregated Account (Artex SAC Ltd.), Variable Rate Notes, 11/30/21 (e)(f) 4,612,050 1,400,000 Casablanca Re, Variable Rate Notes, 6/4/20 (Cat Bond) 1,401,120 3,366,000 Eden Re II, Ltd., Variable Rate Notes, 3/22/21 (e)(f) 3,476,741 1,590,000 Eden Re II, Ltd., Variable Rate Notes, 3/22/21 (144A) (e)(f) 1,641,834 3,060 Eden Re II, Ltd., Variable Rate Notes, 4/23/19 (144A) (e)(f) 67,038 2,176 Eden Re II, Variable Rate Notes, 4/23/19 (e)(f) 174,354 The accompanying notes are an integral part of these financial statements. 44 Pioneer Bond Fund | Annual Report | 6/30/17 ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- Reinsurance -- (continued) 1,300,000 5.48 Galilei Re, Ltd., Floating Rate Note, 1/8/20 (Cat Bond) (144A) $ 1,293,110 1,300,000 6.34 Galilei Re, Ltd., Floating Rate Note, 1/8/20 (Cat Bond) (144A) 1,297,790 1,400,000 7.34 Galilei Re, Ltd., Floating Rate Note, 1/8/20 (Cat Bond) (144A) 1,404,060 1,500,000 5.51 Galilei Re, Ltd., Floating Rate Note, 1/8/21 (Cat Bond) (144A) 1,500,750 1,200,000 6.26 Galilei Re, Ltd., Floating Rate Note, 1/8/21 (Cat Bond) (144A) 1,201,320 1,500,000 7.26 Galilei Re, Ltd., Floating Rate Note, 1/8/21 (Cat Bond) (144A) 1,514,850 3,500,000 Gleneagles Segregated Account (Artex SAC Ltd.), Variable Rate Notes, 11/30/20 (e)(f) 410,200 2,800,000 2.52 Golden State Re II, Ltd., Floating Rate Note, 1/8/19 (Cat Bond) (144A) 2,785,720 1,800,000 Gulfstream Segregated Account, (Artex SAC Ltd.), 6/12/18 (e)(f) 1,694,520 5,100,000 Gullane Segregated Account (Artex SAC Ltd.), Variable Rate Note 11/30/20 (e)(f) 111,180 5,100,000 Gullane Segregated Account (Artex SAC Ltd.), Variable Rate Note 11/30/21 (e)(f) 5,370,810 1,700,000 0.00 International Bank For Reconstruction & Development, Series A, Floating Rate Note, 6/15/20 (Cat Bond) 1,700,000 2,600,000 Kilimanjaro Re, Ltd., 7.166%, 4/20/21 (Cat Bond) (144A) 2,633,540 3,500,000 Kilimanjaro Re, Ltd., 8.62%, 4/20/21 (Cat Bond) (144A) 3,552,500 700,000 4.50 Kilimanjaro Re, Ltd., Floating Rate Note, 11/25/19 (Cat Bond) (144A) 711,550 3,000,000 7.25 Kilimanjaro Re, Ltd., Floating Rate Note, 12/6/19 (Cat Bond) (144A) 3,032,100 1,500,000 9.41 Kilimanjaro Re, Ltd., Floating Rate Note, 12/6/19 (Cat Bond) (144A) 1,496,700 350,000 5.25 Kilimanjaro Re, Ltd., Floating Rate Note, 4/30/18 (Cat Bond) (144A) 349,685 3,700,000 5.50 Kilimanjaro Re, Ltd., Floating Rate Note, 4/30/18 (Cat Bond) (144A) 3,687,790 2,800,000 Kingsbarns 2017 Segregated Account (Artex SAC Ltd.), 5/15/18 (e)(f) 2,667,560 1,000,000 Lahinch Re, Variable Rate Notes, 5/10/21 (e)(f) 17,800 600,000 0.00 Limestone Re, Ltd., 8/31/21 (e)(f) 607,800 1,750,000 0.00 Limestone Re, Ltd., 8/31/21 (e)(f) 1,772,750 250,000 10.54 Loma Reinsurance Bermuda, Ltd., Floating Rate Note, 1/8/18 (Cat Bond) (144A) 248,150 4,000,000 4.05 Long Point Re III, Ltd., Floating Rate Note, 5/23/18 (Cat Bond) (144A) 4,026,800 3,000,000 Lorenz Re 2017, Ltd., Variable Rate Notes, 3/31/20 (e)(f) 3,060,300 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/17 45 Schedule of Investments | 6/30/17 (continued) ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- Reinsurance -- (continued) 1,300,000 Lorenz Re, Ltd., Variable Rate Notes, 3/31/18 (e)(f) $ 7,540 4,050,000 Lorenz Re, Ltd., Variable Rate Notes, 3/31/19 (e)(f) 226,800 1,500,000 Madison Re, Variable Rate Notes,, 12/31/19 (e)(f) 1,528,650 2,000,000 Madison Re, Variable Rate Notes, 3/31/19 (e)(f) 127,000 1,000,000 Oakmont Segregated Account (Artex SAC Ltd.), Variable Rate Notes, 4/13/18 (e)(f) 922,600 3,000,000 Pangaea Re Series, 11/30/21 (e)(f) 3,117,600 3,600,000 Pangaea Re, Series 2015-1, Principal at Risk Notes, 2/1/19 (e)(f) 16,200 4,000,000 Pangaea Re, Series 2015-2, Principal at Risk Notes, 11/30/19 (e)(f) 307,600 3,000,000 Pangaea Re, Series 2016-2, Principal at Risk Notes, 11/30/20 (e)(f) 161,400 4,500,000 Pangaea Re., Variable Rate Notes, 2/1/20 (e)(f) 413,550 3,200,000 5.15 PennUnion Re, Ltd., Floating Rate Note, 12/7/18 (Cat Bond) (144A) 3,212,480 4,000,000 Artex Sac Ltd., Pinehurst Segregated Account (Artex SAC Ltd.), Variable Rate Notes, 1/16/18 (e)(f) 3,884,800 1,000,000 Prestwick Segregated Account (Artex SAC Ltd.), Variable Rate Notes, 7/1/16 (e)(f) 17,000 2,000,000 7.13 Queen Street XI Re Dac, Floating Rate Note, 6/7/19 (Cat Bond) (144A) 2,010,400 2,500,000 3.93 Residential Reinsurance 2016, Ltd., Floating Rate Note, 12/6/23 (Cat Bond) (144A) 2,458,500 3,600,000 0.00 Resilience Re, Ltd., Floating Rate Note, 4/7/18 (e)(f) (144A) 3,300,840 3,600,000 0.00 Resilience Re, Ltd., Floating Rate Note, 4/7/17 (e)(f) 77,400 3,600,000 4.50 Resilience Re, Ltd., Floating Rate Note, 1/9/19 (e)(f) 3,600,000 2,200,000 3.30 Resilience Re, Ltd., Floating Rate Note, 1/9/19 (e)(f) 2,200,000 1,600,000 4.13 Sanders Re, Ltd., Floating Rate Note, 12/6/21 (Cat Bond) (144A) 1,600,320 2,550,000 3.75 Sanders Re, Ltd., Floating Rate Note, 5/25/18 (Cat Bond) (144A) 2,545,155 2,400,000 Sector Re V Ltd., Variable Rate Notes, 3/1/22 (144A) (e)(f) 2,422,800 1,399 Sector Re V, Ltd., Variable Rate Notes, 3/1/21 (144A) (e)(f) 70,357 1,100,000 Sector Re V, Ltd., Variable Rate Notes, 12/1/21 (144A) (e)(f) 1,155,440 3,874 Sector Re V, Ltd., Variable Rate Notes, 3/1/21 (e)(f) 297,753 5,213 Sector Re V, Ltd., Variable Rate Notes, 12/1/20 (144A) (e)(f) 38,672 2,000,000 Shenandoah 2017-1 Segregated Account (Artex SAC Ltd.), Variable Rate Notes, 7/7/17 (e)(f) 2,000,000 The accompanying notes are an integral part of these financial statements. 46 Pioneer Bond Fund | Annual Report | 6/30/17 ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- Reinsurance -- (continued) 2,000,000 Silverton Re, Ltd., Variable Rate Notes, 9/18/19 (144A) (e)(f) $ 2,149,800 1,000,000 Silverton Re, Ltd., Variable Rate Notes, 9/18/17 (144A) (e)(f) 2,000 1,700,000 Silverton Re, Ltd., Variable Rate Notes, 9/18/18 (144A) (e)(f) 82,960 1,000,000 3.03 Skyline Re, Ltd., Floating Rate Note, 1/6/20 (Cat Bond) 996,800 3,000,000 St. Andrews Segregated Account (Artex SAC, Ltd.), Variable Rate Notes, 2/1/19 (e)(f) 3,157,800 1,520,000 St. Andrews 2017-4 Segregated Account (Artex SAC Ltd.), 1/16/18 (e)(f) 1,435,184 1,737,984 St. Andrews 2017-4 Segregated Account (Artex SAC Ltd.), 6/1/19 (e)(f) 1,747,195 1,300,000 St. Andrews Segregated Account (Artex SAC Ltd.), Variable Rate Notes, 1/22/16 (e)(f) 25,610 2,000,000 St. Andrews Segregated Account (Artex SAC Ltd.), Varianble Rate Notes, 2/1/18 (e)(f) 281,200 2,700,000 0.00 Ursa Re, Ltd., Floating Rate Note, 5/20/27 (Cat Bond) (144A) 2,702,430 800,000 6.00 Ursa Re, Ltd., Floating Rate Note, 5/27/20 (Cat Bond) (144A) 800,640 3,000,000 4.53 Ursa Re, Ltd., Floating Rate Note, 12/10/19 (Cat Bond) (144A) 3,009,900 4,000,000 Versutus 2016 Class A, Variable Rate Notes, 11/30/21 (e)(f) 4,103,600 4,000,000 Versutus 2016, Class A-1, Variable Rate Notes, 11/30/20 (e)(f) 174,800 1,750,000 2.01 Vitality Re V, Ltd., Floating Rate Note, 1/7/19 (Cat Bond) (144A) 1,745,100 2,900,000 2.47 Vitality Re VII, Ltd., Floating Rate Note, 1/7/20 (Cat Bond) (144A) 2,926,100 1,000,000 3.15 Vitality Re VII, Ltd., Floating Rate Note, 1/7/20 (Cat Bond) (144A) 1,017,100 -------------- $ 136,329,118 -------------- Total Insurance $ 212,575,515 ---------------------------------------------------------------------------------------------------- REAL ESTATE -- 1.5% Diversified REIT -- 0.6% 1,480,000 Essex Portfolio LP, 3.625%, 5/1/27 $ 1,476,350 2,175,000 Duke Realty LP, 3.625%, 4/15/23 2,227,133 8,560,000 Duke Realty LP, 3.75%, 12/1/24 8,791,171 9,500,000 Essex Portfolio LP, 3.5%, 4/1/25 9,497,862 3,985,000 Ventas Realty LP, 3.125%, 6/15/23 3,961,353 -------------- $ 25,953,869 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/17 47 Schedule of Investments | 6/30/17 (continued) ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- Office REIT -- 0.5% 2,681,000 Alexandria Real Estate Equities, Inc., 2.75%, 1/15/20 $ 2,699,408 2,768,000 Alexandria Real Estate Equities, Inc., 3.9%, 6/15/23 2,859,917 1,350,000 Alexandria Real Estate Equities, Inc., 3.95%, 1/15/27 1,374,967 3,415,000 Alexandria Real Estate Equities, Inc., 4.6%, 4/1/22 3,649,341 2,032,000 Highwoods Realty LP, 3.2%, 6/15/21 2,052,558 3,390,000 Highwoods Realty LP, 3.625%, 1/15/23 3,427,395 7,325,000 Piedmont Operating Partnership LP, 3.4%, 6/1/23 7,142,659 -------------- $ 23,206,245 ---------------------------------------------------------------------------------------------------- Health Care REIT -- 0.2% 4,675,000 Healthcare Trust Of America, 3.75%, 7/1/27 $ 4,621,032 6,805,000 Healthcare Trust of America Holdings LP, 3.5%, 8/1/26 6,654,433 -------------- $ 11,275,465 ---------------------------------------------------------------------------------------------------- Residential REIT -- 0.2% 10,450,000 UDR, Inc., 4.0%, 10/1/25 $ 10,807,244 -------------- Total Real Estate $ 71,242,823 ---------------------------------------------------------------------------------------------------- SOFTWARE & SERVICES -- 0.8% IT Consulting & Other Services -- 0.1% 3,045,000 J2 Cloud LLC/Global Inc., 6.00%, 7/15/25 (144A) $ 3,136,350 ---------------------------------------------------------------------------------------------------- Data Processing & Outsourced Services -- 0.1% 3,000,000 Cardtronics, Inc., 5.125%, 8/1/22 $ 3,045,000 4,550,000 Visa, Inc., 2.2%, 12/14/20 4,588,043 -------------- $ 7,633,043 ---------------------------------------------------------------------------------------------------- Application Software -- 0.2% 8,560,000 Adobe Systems, Inc., 3.25%, 2/1/25 $ 8,749,125 ---------------------------------------------------------------------------------------------------- Systems Software -- 0.4% 4,770,000 CA Inc., 3.60%, 8/15/22 $ 4,823,524 5,225,000 Microsoft Corp., 2.0%, 8/8/23 5,091,648 10,600,000 Oracle Corp., 2.5%, 5/15/22 10,700,594 -------------- $ 20,615,766 -------------- Total Software & Services $ 40,134,284 ---------------------------------------------------------------------------------------------------- TECHNOLOGY HARDWARE & EQUIPMENT -- 0.5% Computer Hardware Storage & Peripherals -- 0.1% 4,600,000 NCR Corp., 4.625%, 2/15/21 $ 4,692,000 ---------------------------------------------------------------------------------------------------- Electronic Components -- 0.3% 3,065,000 Amphenol Corp., 3.20%, 4/1/24 $ 3,096,229 8,412,000 Amphenol Corp., 3.125%, 9/15/21 8,607,579 -------------- $ 11,703,808 ---------------------------------------------------------------------------------------------------- Electronic Manufacturing Services -- 0.1% 5,780,000 Flex, Ltd., 4.75%, 6/15/25 $ 6,139,412 -------------- Total Technology Hardware & Equipment $ 22,535,220 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 48 Pioneer Bond Fund | Annual Report | 6/30/17 ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- SEMICONDUCTORS & SEMICONDUCTOR EQUIPMENT -- 0.5% Semiconductors -- 0.5% 10,545,000 Broadcom Corp., 3.625%, 1/15/24 (144A) $ 10,787,514 11,075,000 Intel Corp., 4.8%, 10/1/41 12,686,379 -------------- $ 23,473,893 -------------- Total Semiconductors & Semiconductor Equipment $ 23,473,893 ---------------------------------------------------------------------------------------------------- TELECOMMUNICATION SERVICES -- 0.8% Integrated Telecommunication Services -- 0.6% 2,035,000 CenturyLink, Inc., 5.8%, 3/15/22 $ 2,116,400 14,575,000 Deutsche Telekom International Finance BV, 3.6%, 1/19/27 (144A) 14,829,013 4,300,000 Frontier Communications Corp., 7.125%, 1/15/23 3,579,750 4,800,000 GTP Acquisition Partners I LLC, 2.35%, 6/15/45 (144A) 4,745,808 2,750,000 Telefonica Emisiones SAU, 6.221%, 7/3/17 2,750,000 1,500,000 Unison Ground Lease Funding LLC, 2.981%, 3/16/43 (144A) 1,470,522 -------------- $ 29,491,493 ---------------------------------------------------------------------------------------------------- Wireless Telecommunication Services -- 0.2% 2,200,000 Crown Castle Towers LLC, 4.883%, 8/15/20 (144A) $ 2,347,662 1,625,000 Crown Castle Towers LLC, 6.113%, 1/15/20 (144A) 1,747,024 3,100,000 SBA Tower Trust, 2.877%, 7/15/21 (144A) 3,093,645 -------------- $ 7,188,331 -------------- Total Telecommunication Services $ 36,679,824 ---------------------------------------------------------------------------------------------------- UTILITIES -- 3.1% Electric Utilities -- 2.1% 980,000 Commonwealth Edison Co., 6.15%, 9/15/17 $ 988,874 5,000,000 Edp Finance BV, 3.625%, 7/15/24 (144A) 4,936,690 4,250,000 Electricite de France SA, 6.0%, 1/22/14 (144A) 4,677,146 2,150,000 5.25 Electricite de France SA, Floating Rate Note (Perpetual) (144A) 2,205,900 2,800,000 Enel Finance International NV, 4.75%, 5/25/47 (144A) 2,881,085 3,365,000 Enel Finance International NV, 5.125%, 10/7/19 (144A) 3,580,407 2,320,000 8.13 Enel S.p.A., Floating Rate Note, 9/24/73 (144A) 2,760,800 6,365,000 Exelon Corp., 2.85%, 6/15/20 6,466,394 416,827 FPL Energy American Wind LLC, 6.639%, 6/20/23 (144A) 427,247 4,655,000 Iberdrola International BV, 6.75%, 7/15/36 6,058,706 2,725,000 Indiana Michigan Power Co., 4.55%, 3/15/46 2,980,878 5,450,000 Israel Electric Corp, Ltd., 5.0%, 11/12/24 5,856,025 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/17 49 Schedule of Investments | 6/30/17 (continued) ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- Electric Utilities -- (continued) 1,925,000 Israel Electric Corp., Ltd., 7.25%, 1/15/19 (144A) $ 2,064,355 610,000 Israel Electric Corp., Ltd., 9.375%, 1/28/20 (144A) 713,670 910,000 Nevada Power Co., 6.5%, 8/1/18 956,525 6,536,000 NextEra Energy Capital Holdings, Inc., 2.3%, 4/1/19 6,566,000 10,270,000 Nextera Energy Capital, 3.55%, 5/1/27 10,433,129 337,003 OrCal Geothermal, Inc., 6.21%, 12/30/20 (144A) 331,948 11,910,000 PPL Capital Funding, Inc., 3.1%, 5/15/26 11,656,174 2,690,000 Public Service Co. of New Mexico, 7.95%, 5/15/18 2,830,604 4,428,571 Southern California Edison Co., 1.845%, 2/1/22 4,372,833 5,720,000 6.25 Southern California Edison Co., Floating Rate Note (Perpetual) 6,334,900 10,800,000 Southwestern Electric Power Co., 3.9%, 4/1/45 10,592,813 -------------- $ 100,673,103 ---------------------------------------------------------------------------------------------------- Gas Utilities -- 0.1% 2,215,000 AmeriGas Partners LP, 5.5%, 5/20/25 $ 2,259,300 2,125,000 DCP Midstream Operating LP, 5.6%, 4/1/44 2,002,812 2,043,789 Nakilat, Inc., 6.267%, 12/31/33 (144A) 2,319,700 -------------- $ 6,581,812 ---------------------------------------------------------------------------------------------------- Multi-Utilities -- 0.6% 8,385,000 Consolidated Edison Co. of New York, Inc., 4.625%, 12/1/54 $ 9,253,443 6,728,000 Dominion Energy Inc., 2.579 % 7/1/20 6,762,757 2,700,000 Dominion Resources, Inc. Virginia, 2.75%, 1/15/22 2,714,683 5,055,000 New York State Electric & Gas Corp., 6.15%, 12/15/17 (144A) 5,149,104 137,401 Ormat Funding Corp., 8.25%, 12/30/20 137,401 2,392,857 San Diego Gas & Electric Co., 1.914%, 2/1/22 2,366,727 -------------- $ 26,384,115 ---------------------------------------------------------------------------------------------------- Independent Power Producers & Energy Traders -- 0.3% 471,946 Alta Wind Holdings LLC, 7.0%, 6/30/35 (144A) $ 534,787 2,850,000 Calpine Corp., 5.25%, 6/1/26 (144A) 2,793,000 3,005,000 Calpine Corp., 5.75%, 1/15/25 2,817,188 942,269 Kiowa Power Partners LLC, 5.737%, 3/30/21 (144A) 977,634 4,035,000 NRG Energy, Inc., 6.625%, 3/15/23 4,145,962 750,000 NRG Energy, Inc., 7.25%, 5/15/26 776,250 182,000 NRG Energy, Inc., 7.875%, 5/15/21 187,915 -------------- $ 12,232,736 -------------- Total Utilities $ 145,871,766 ---------------------------------------------------------------------------------------------------- TOTAL CORPORATE BONDS (Cost $1,549,794,313) $1,598,902,650 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 50 Pioneer Bond Fund | Annual Report | 6/30/17 ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- 33.8% 260,913 Fannie Mae, 2.5%, 1/1/43 $ 252,804 136,314 Fannie Mae, 2.5%, 1/1/46 131,529 284,091 Fannie Mae, 2.5%, 12/1/42 275,260 300,594 Fannie Mae, 2.5%, 12/1/42 291,253 242,249 Fannie Mae, 2.5%, 12/1/43 234,396 104,056 Fannie Mae, 2.5%, 2/1/43 100,826 120,292 Fannie Mae, 2.5%, 2/1/43 116,153 2,839,815 Fannie Mae, 2.5%, 2/1/43 2,751,543 382,080 Fannie Mae, 2.5%, 3/1/43 370,212 172,033 Fannie Mae, 2.5%, 3/1/44 166,696 127,876 Fannie Mae, 2.5%, 4/1/43 123,903 320,971 Fannie Mae, 2.5%, 4/1/45 309,697 513,181 Fannie Mae, 2.5%, 4/1/45 495,167 614,032 Fannie Mae, 2.5%, 4/1/45 592,465 684,234 Fannie Mae, 2.5%, 4/1/45 660,206 791,292 Fannie Mae, 2.5%, 4/1/45 763,507 1,338,030 Fannie Mae, 2.5%, 4/1/45 1,291,071 1,639,154 Fannie Mae, 2.5%, 4/1/45 1,581,607 75,146 Fannie Mae, 2.5%, 5/1/45 72,508 1,509,115 Fannie Mae, 2.5%, 7/1/30 1,522,358 1,515,874 Fannie Mae, 2.5%, 7/1/30 1,529,174 2,550,870 Fannie Mae, 2.5%, 7/1/30 2,573,237 91,143 Fannie Mae, 2.5%, 7/1/45 87,944 376,794 Fannie Mae, 2.5%, 8/1/43 365,085 285,845 Fannie Mae, 2.5%, 8/1/45 275,820 8,373,703 Fannie Mae, 3.0%, 1/1/47 8,409,000 3,417,961 Fannie Mae, 3.0%, 10/1/30 3,512,118 9,573,506 Fannie Mae, 3.0%, 10/1/46 9,567,345 9,669,071 Fannie Mae, 3.0%, 11/1/46 9,662,849 1,395,767 Fannie Mae, 3.0%, 12/1/42 1,403,846 2,708,430 Fannie Mae, 3.0%, 2/1/43 2,724,082 1,060,386 Fannie Mae, 3.0%, 3/1/45 1,062,991 2,840,374 Fannie Mae, 3.0%, 3/1/47 2,838,546 8,112,038 Fannie Mae, 3.0%, 5/1/30 8,331,606 7,536,326 Fannie Mae, 3.0%, 5/1/31 7,754,903 744,179 Fannie Mae, 3.0%, 5/1/43 748,470 10,366,423 Fannie Mae, 3.0%, 5/1/43 10,409,317 704,751 Fannie Mae, 3.0%, 5/1/46 707,697 1,031,348 Fannie Mae, 3.0%, 5/1/46 1,034,221 7,637,126 Fannie Mae, 3.0%, 6/1/45 7,665,934 2,339,244 Fannie Mae, 3.0%, 7/1/30 2,402,561 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/17 51 Schedule of Investments | 6/30/17 (continued) ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 705,467 Fannie Mae, 3.0%, 7/1/43 $ 708,339 18,069,800 Fannie Mae, 3.0%, 8/1/42 18,146,251 1,722,133 Fannie Mae, 3.0%, 8/1/43 1,728,979 4,061,989 Fannie Mae, 3.0%, 9/1/28 4,183,674 4,694,431 Fannie Mae, 3.0%, 9/1/42 4,717,151 4,864,151 Fannie Mae, 3.0%, 9/1/43 4,883,517 5,106,866 Fannie Mae, 3.0%, 9/1/46 5,103,580 6,462,186 Fannie Mae, 3.5%, 1/1/46 6,641,183 8,101,967 Fannie Mae, 3.5%, 1/1/46 8,326,384 2,806,383 Fannie Mae, 3.5%, 1/1/47 2,884,117 5,180,677 Fannie Mae, 3.5%, 1/1/47 5,324,177 7,419,099 Fannie Mae, 3.5%, 1/1/47 7,663,594 12,040,659 Fannie Mae, 3.5%, 1/1/47 12,399,220 620,347 Fannie Mae, 3.5%, 10/1/41 641,712 1,745,511 Fannie Mae, 3.5%, 10/1/45 1,797,242 616,259 Fannie Mae, 3.5%, 10/1/46 634,583 1,109,834 Fannie Mae, 3.5%, 10/1/46 1,140,575 1,232,540 Fannie Mae, 3.5%, 11/1/40 1,273,303 264,870 Fannie Mae, 3.5%, 11/1/42 273,534 13,437,161 Fannie Mae, 3.5%, 11/1/45 13,936,915 1,227,265 Fannie Mae, 3.5%, 11/1/46 1,261,259 1,206,357 Fannie Mae, 3.5%, 12/1/26 1,255,958 578,857 Fannie Mae, 3.5%, 12/1/42 597,789 649,331 Fannie Mae, 3.5%, 12/1/42 670,563 2,691,321 Fannie Mae, 3.5%, 12/1/45 2,765,868 3,014,923 Fannie Mae, 3.5%, 12/1/45 3,098,433 5,374,849 Fannie Mae, 3.5%, 12/1/45 5,523,727 4,936,622 Fannie Mae, 3.5%, 12/1/46 5,073,362 2,253,236 Fannie Mae, 3.5%, 2/1/29 2,345,908 5,833,783 Fannie Mae, 3.5%, 2/1/44 5,996,604 6,309,983 Fannie Mae, 3.5%, 2/1/45 6,515,501 3,460,399 Fannie Mae, 3.5%, 2/1/46 3,556,249 5,726,954 Fannie Mae, 3.5%, 2/1/46 5,885,585 6,281,278 Fannie Mae, 3.5%, 2/1/47 6,455,264 2,256,129 Fannie Mae, 3.5%, 3/1/46 2,318,622 867,691 Fannie Mae, 3.5%, 4/1/26 903,367 1,900,604 Fannie Mae, 3.5%, 4/1/45 1,961,090 4,631,916 Fannie Mae, 3.5%, 4/1/46 4,760,216 2,848,162 Fannie Mae, 3.5%, 5/1/46 2,941,937 8,138,703 Fannie Mae, 3.5%, 5/1/47 8,364,137 8,696,820 Fannie Mae, 3.5%, 5/1/47 8,937,714 The accompanying notes are an integral part of these financial statements. 52 Pioneer Bond Fund | Annual Report | 6/30/17 ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 3,163,931 Fannie Mae, 3.5%, 6/1/28 $ 3,294,558 553,158 Fannie Mae, 3.5%, 6/1/42 571,309 7,349,578 Fannie Mae, 3.5%, 6/1/45 7,567,194 3,224,230 Fannie Mae, 3.5%, 7/1/42 3,325,519 12,305,836 Fannie Mae, 3.5%, 7/1/46 12,646,695 12,454,522 Fannie Mae, 3.5%, 7/1/47 12,849,564 3,408,942 Fannie Mae, 3.5%, 8/1/42 3,514,281 3,080,855 Fannie Mae, 3.5%, 8/1/45 3,166,191 8,966,472 Fannie Mae, 3.5%, 8/1/45 9,299,944 9,088,450 Fannie Mae, 3.5%, 8/1/46 9,340,191 496,366 Fannie Mae, 3.5%, 9/1/26 517,466 3,137,693 Fannie Mae, 3.5%, 9/1/44 3,224,604 6,701,936 Fannie Mae, 3.5%, 9/1/45 6,924,422 8,670,926 Fannie Mae, 3.5%, 9/1/45 8,911,102 9,536,663 Fannie Mae, 3.5%, 9/1/46 9,800,820 1,098,209 Fannie Mae, 3.763%, 12/1/20 1,153,851 419,665 Fannie Mae, 4.0%, 1/1/42 442,769 3,410,572 Fannie Mae, 4.0%, 1/1/42 3,598,600 132,178 Fannie Mae, 4.0%, 1/1/44 139,014 84,994 Fannie Mae, 4.0%, 1/1/45 89,390 226,798 Fannie Mae, 4.0%, 1/1/45 238,526 423,409 Fannie Mae, 4.0%, 1/1/45 445,305 2,818,646 Fannie Mae, 4.0%, 1/1/46 2,964,411 14,392,445 Fannie Mae, 4.0%, 1/1/47 15,141,421 7,481,179 Fannie Mae, 4.0%, 10/1/40 7,997,417 1,720,714 Fannie Mae, 4.0%, 10/1/41 1,818,605 1,681,796 Fannie Mae, 4.0%, 10/1/42 1,774,680 12,067,072 Fannie Mae, 4.0%, 10/1/43 12,770,761 1,869,042 Fannie Mae, 4.0%, 10/1/44 1,965,698 3,489,631 Fannie Mae, 4.0%, 10/1/45 3,670,096 5,379,456 Fannie Mae, 4.0%, 10/1/45 5,657,652 3,842,191 Fannie Mae, 4.0%, 11/1/43 4,079,094 108,331 Fannie Mae, 4.0%, 11/1/44 113,934 147,850 Fannie Mae, 4.0%, 11/1/44 155,496 282,649 Fannie Mae, 4.0%, 11/1/44 297,266 6,091,719 Fannie Mae, 4.0%, 11/1/44 6,406,749 111,509 Fannie Mae, 4.0%, 11/1/45 117,276 4,405,152 Fannie Mae, 4.0%, 11/1/45 4,632,962 9,569,389 Fannie Mae, 4.0%, 11/1/45 10,157,125 1,664,243 Fannie Mae, 4.0%, 11/1/46 1,750,308 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/17 53 Schedule of Investments | 6/30/17 (continued) ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 1,359,418 Fannie Mae, 4.0%, 12/1/40 $ 1,453,343 1,292,146 Fannie Mae, 4.0%, 12/1/41 1,363,467 4,586,776 Fannie Mae, 4.0%, 12/1/43 4,867,260 58,073 Fannie Mae, 4.0%, 12/1/44 61,076 520,110 Fannie Mae, 4.0%, 12/1/44 547,007 6,926,618 Fannie Mae, 4.0%, 12/1/45 7,284,825 2,740,965 Fannie Mae, 4.0%, 2/1/42 2,891,542 6,999,789 Fannie Mae, 4.0%, 2/1/42 7,385,454 6,319,720 Fannie Mae, 4.0%, 2/1/44 6,646,541 52,279 Fannie Mae, 4.0%, 2/1/45 54,982 225,964 Fannie Mae, 4.0%, 2/1/45 237,682 471,236 Fannie Mae, 4.0%, 2/1/45 495,605 7,238,644 Fannie Mae, 4.0%, 2/1/46 7,617,493 618,068 Fannie Mae, 4.0%, 2/1/47 654,569 1,297,221 Fannie Mae, 4.0%, 3/1/42 1,373,323 5,474,769 Fannie Mae, 4.0%, 3/1/45 5,757,894 340,460 Fannie Mae, 4.0%, 4/1/25 358,393 2,991,809 Fannie Mae, 4.0%, 4/1/39 3,162,563 818,626 Fannie Mae, 4.0%, 4/1/41 869,191 1,205,408 Fannie Mae, 4.0%, 4/1/41 1,271,812 290,521 Fannie Mae, 4.0%, 4/1/42 305,837 698,202 Fannie Mae, 4.0%, 4/1/42 736,637 2,954,744 Fannie Mae, 4.0%, 4/1/42 3,117,686 1,846,708 Fannie Mae, 4.0%, 4/1/46 1,942,209 3,497,528 Fannie Mae, 4.0%, 4/1/47 3,696,322 3,564,225 Fannie Mae, 4.0%, 4/1/47 3,748,547 5,555,892 Fannie Mae, 4.0%, 4/1/47 5,871,685 973,875 Fannie Mae, 4.0%, 5/1/41 1,027,543 171,244 Fannie Mae, 4.0%, 6/1/42 180,701 429,686 Fannie Mae, 4.0%, 6/1/42 452,018 95,400 Fannie Mae, 4.0%, 6/1/44 100,333 139,174 Fannie Mae, 4.0%, 6/1/44 146,372 6,796,370 Fannie Mae, 4.0%, 6/1/46 7,147,841 586,377 Fannie Mae, 4.0%, 6/1/47 619,706 2,175,000 Fannie Mae, 4.0%, 6/1/47 2,298,626 3,482,151 Fannie Mae, 4.0%, 6/1/47 3,662,229 5,375,000 Fannie Mae, 4.0%, 6/1/47 5,652,965 9,552,088 Fannie Mae, 4.0%, 6/1/47 10,046,069 5,301 Fannie Mae, 4.0%, 7/1/18 5,487 167,021 Fannie Mae, 4.0%, 7/1/42 175,837 3,936,262 Fannie Mae, 4.0%, 7/1/42 4,177,994 The accompanying notes are an integral part of these financial statements. 54 Pioneer Bond Fund | Annual Report | 6/30/17 ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 362,121 Fannie Mae, 4.0%, 7/1/44 $ 380,848 6,072,618 Fannie Mae, 4.0%, 7/1/44 6,386,660 6,964,491 Fannie Mae, 4.0%, 7/1/46 7,324,656 9,671,151 Fannie Mae, 4.0%, 7/1/46 10,171,289 8,813,752 Fannie Mae, 4.0%, 8/1/42 9,299,559 5,411,887 Fannie Mae, 4.0%, 8/1/43 5,692,566 270,894 Fannie Mae, 4.0%, 8/1/44 284,903 271,535 Fannie Mae, 4.0%, 8/1/44 285,577 1,575,062 Fannie Mae, 4.0%, 8/1/44 1,656,515 4,769,774 Fannie Mae, 4.0%, 8/1/44 5,016,441 3,648,580 Fannie Mae, 4.0%, 8/1/45 3,863,064 5,600,196 Fannie Mae, 4.0%, 8/1/46 5,889,808 6,928,947 Fannie Mae, 4.0%, 8/1/46 7,287,274 7,122,101 Fannie Mae, 4.0%, 8/1/46 7,490,417 31,235 Fannie Mae, 4.0%, 9/1/20 32,335 6,472,164 Fannie Mae, 4.0%, 9/1/43 6,813,305 46,193 Fannie Mae, 4.0%, 9/1/44 48,582 418,011 Fannie Mae, 4.0%, 9/1/44 439,628 478,412 Fannie Mae, 4.0%, 9/1/44 503,153 7,823,770 Fannie Mae, 4.0%, 9/1/44 8,284,856 4,383,623 Fannie Mae, 4.5%, 1/1/42 4,741,556 5,808,863 Fannie Mae, 4.5%, 1/1/42 6,283,964 6,170,449 Fannie Mae, 4.5%, 1/1/44 6,628,360 718,287 Fannie Mae, 4.5%, 1/1/47 771,655 220,428 Fannie Mae, 4.5%, 10/1/35 237,260 13,008 Fannie Mae, 4.5%, 11/1/20 13,329 181,501 Fannie Mae, 4.5%, 11/1/20 187,442 1,924,307 Fannie Mae, 4.5%, 11/1/40 2,081,742 647,917 Fannie Mae, 4.5%, 11/1/43 695,551 193,532 Fannie Mae, 4.5%, 12/1/40 209,487 3,659,575 Fannie Mae, 4.5%, 12/1/43 3,981,138 5,787,190 Fannie Mae, 4.5%, 12/1/43 6,210,310 8,400,947 Fannie Mae, 4.5%, 12/1/43 9,026,975 725,547 Fannie Mae, 4.5%, 2/1/41 784,854 3,461,758 Fannie Mae, 4.5%, 2/1/44 3,720,351 4,135,192 Fannie Mae, 4.5%, 2/1/44 4,440,713 571,896 Fannie Mae, 4.5%, 2/1/47 613,565 4,111,857 Fannie Mae, 4.5%, 2/1/47 4,412,325 1,740,975 Fannie Mae, 4.5%, 4/1/41 1,883,120 92,938 Fannie Mae, 4.5%, 5/1/41 100,558 2,380,115 Fannie Mae, 4.5%, 5/1/41 2,572,670 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/17 55 Schedule of Investments | 6/30/17 (continued) ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 3,121,666 Fannie Mae, 4.5%, 5/1/41 $ 3,376,560 3,775,722 Fannie Mae, 4.5%, 5/1/41 4,101,273 7,186,700 Fannie Mae, 4.5%, 5/1/46 7,710,909 1,077,123 Fannie Mae, 4.5%, 7/1/41 1,159,057 1,320,444 Fannie Mae, 4.5%, 7/1/41 1,429,523 1,467,536 Fannie Mae, 4.5%, 7/1/41 1,583,843 532,906 Fannie Mae, 4.5%, 8/1/40 576,419 946,480 Fannie Mae, 4.5%, 8/1/40 1,023,818 42,833 Fannie Mae, 5.0%, 1/1/20 44,028 101,101 Fannie Mae, 5.0%, 1/1/20 103,531 161,285 Fannie Mae, 5.0%, 10/1/20 166,838 214,880 Fannie Mae, 5.0%, 10/1/34 231,495 16,955 Fannie Mae, 5.0%, 2/1/20 17,363 9,409 Fannie Mae, 5.0%, 2/1/22 9,910 135,721 Fannie Mae, 5.0%, 2/1/22 141,372 829,934 Fannie Mae, 5.0%, 2/1/39 910,937 3,165,815 Fannie Mae, 5.0%, 2/1/41 3,462,693 12,303,930 Fannie Mae, 5.0%, 2/1/45 13,466,618 70,803 Fannie Mae, 5.0%, 3/1/23 74,671 298,075 Fannie Mae, 5.0%, 5/1/23 315,438 625,865 Fannie Mae, 5.0%, 6/1/40 685,258 696,893 Fannie Mae, 5.0%, 6/1/40 762,419 155,216 Fannie Mae, 5.0%, 7/1/34 166,299 486,626 Fannie Mae, 5.0%, 7/1/40 532,092 709,645 Fannie Mae, 5.0%, 7/1/40 776,261 1,010,873 Fannie Mae, 5.0%, 7/1/40 1,105,899 19,115 Fannie Mae, 5.0%, 8/1/18 19,575 10,319 Fannie Mae, 5.5%, 12/1/17 10,342 329,102 Fannie Mae, 5.5%, 3/1/36 368,176 159,188 Fannie Mae, 5.5%, 5/1/36 177,795 18,737 Fannie Mae, 5.5%, 6/1/33 20,810 176,743 Fannie Mae, 5.5%, 6/1/36 197,778 90,727 Fannie Mae, 5.5%, 7/1/33 101,555 580,628 Fannie Mae, 5.5%, 7/1/34 650,206 116,844 Fannie Mae, 5.5%, 9/1/19 119,477 53,874 Fannie Mae, 5.72%, 11/1/28 55,444 35,344 Fannie Mae, 5.72%, 6/1/29 35,625 25,970 Fannie Mae, 5.9%, 11/1/27 26,087 79,554 Fannie Mae, 5.9%, 4/1/28 82,950 3,605 Fannie Mae, 6.0%, 1/1/32 4,093 49,813 Fannie Mae, 6.0%, 10/1/32 56,713 The accompanying notes are an integral part of these financial statements. 56 Pioneer Bond Fund | Annual Report | 6/30/17 ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 12,746 Fannie Mae, 6.0%, 10/1/34 $ 14,525 86,016 Fannie Mae, 6.0%, 10/1/35 96,710 28,218 Fannie Mae, 6.0%, 11/1/33 32,198 10,883 Fannie Mae, 6.0%, 11/1/34 12,434 246,072 Fannie Mae, 6.0%, 11/1/34 280,485 197,233 Fannie Mae, 6.0%, 12/1/35 225,137 26,448 Fannie Mae, 6.0%, 12/1/37 30,004 16,481 Fannie Mae, 6.0%, 2/1/32 18,749 8,202 Fannie Mae, 6.0%, 2/1/33 9,221 4,068 Fannie Mae, 6.0%, 2/1/35 4,642 9,574 Fannie Mae, 6.0%, 2/1/35 10,933 5,631 Fannie Mae, 6.0%, 3/1/32 6,389 72,529 Fannie Mae, 6.0%, 3/1/33 82,614 69,305 Fannie Mae, 6.0%, 4/1/33 77,948 175,315 Fannie Mae, 6.0%, 4/1/35 200,245 28,251 Fannie Mae, 6.0%, 5/1/35 31,899 320,208 Fannie Mae, 6.0%, 6/1/38 363,653 152,582 Fannie Mae, 6.0%, 7/1/33 172,236 270,212 Fannie Mae, 6.0%, 7/1/33 304,039 42,540 Fannie Mae, 6.0%, 7/1/38 47,897 3,665 Fannie Mae, 6.0%, 8/1/32 4,168 124,307 Fannie Mae, 6.0%, 8/1/34 142,141 924 Fannie Mae, 6.0%, 9/1/29 1,049 438 Fannie Mae, 6.0%, 9/1/32 498 7,342 Fannie Mae, 6.0%, 9/1/34 8,314 27,110 Fannie Mae, 6.0%, 9/1/34 30,918 42,679 Fannie Mae, 6.0%, 9/1/34 48,701 92,008 Fannie Mae, 6.0%, 9/1/34 103,747 2,303 Fannie Mae, 6.5%, 1/1/31 2,547 3,504 Fannie Mae, 6.5%, 10/1/31 3,876 70,123 Fannie Mae, 6.5%, 10/1/32 77,559 119,412 Fannie Mae, 6.5%, 11/1/37 135,010 34,816 Fannie Mae, 6.5%, 11/1/47 37,433 125,862 Fannie Mae, 6.5%, 12/1/31 139,209 4,645 Fannie Mae, 6.5%, 2/1/32 5,137 58,178 Fannie Mae, 6.5%, 3/1/32 64,606 1,982 Fannie Mae, 6.5%, 4/1/31 2,193 4,872 Fannie Mae, 6.5%, 5/1/31 5,389 69,294 Fannie Mae, 6.5%, 6/1/31 76,642 6,816 Fannie Mae, 6.5%, 7/1/29 7,538 101,639 Fannie Mae, 6.5%, 7/1/32 114,510 28,753 Fannie Mae, 6.5%, 7/1/34 31,802 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/17 57 Schedule of Investments | 6/30/17 (continued) ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 8,636 Fannie Mae, 6.5%, 8/1/31 $ 9,552 3,850 Fannie Mae, 6.5%, 9/1/31 4,258 6,999 Fannie Mae, 6.5%, 9/1/31 7,852 17,254 Fannie Mae, 7.0%, 1/1/32 20,063 680 Fannie Mae, 7.0%, 12/1/30 717 6,847 Fannie Mae, 7.0%, 12/1/30 7,633 24,169 Fannie Mae, 7.0%, 12/1/31 25,603 7,621 Fannie Mae, 7.0%, 4/1/31 8,959 9,066 Fannie Mae, 7.0%, 9/1/31 10,543 349,864 Federal Home Loan Mortgage Corp., 2.5%, 1/1/30 352,601 218,758 Federal Home Loan Mortgage Corp., 2.5%, 4/1/30 220,453 3,159,039 Federal Home Loan Mortgage Corp., 3.0%, 10/1/29 3,246,614 1,371,413 Federal Home Loan Mortgage Corp., 3.0%, 11/1/30 1,409,442 7,367,230 Federal Home Loan Mortgage Corp., 3.0%, 11/1/42 7,392,736 1,355,518 Federal Home Loan Mortgage Corp., 3.0%, 12/1/46 1,357,678 2,241,810 Federal Home Loan Mortgage Corp., 3.0%, 12/1/46 2,238,414 815,088 Federal Home Loan Mortgage Corp., 3.0%, 2/1/43 819,088 2,067,421 Federal Home Loan Mortgage Corp., 3.0%, 2/1/43 2,077,565 6,124,637 Federal Home Loan Mortgage Corp., 3.0%, 2/1/47 6,115,359 836,054 Federal Home Loan Mortgage Corp., 3.0%, 3/1/47 834,788 2,540,025 Federal Home Loan Mortgage Corp., 3.0%, 5/1/43 2,548,170 1,827,070 Federal Home Loan Mortgage Corp., 3.0%, 5/1/45 1,829,553 5,394,657 Federal Home Loan Mortgage Corp., 3.0%, 6/1/46 5,403,255 3,194,441 Federal Home Loan Mortgage Corp., 3.0%, 8/1/29 3,285,907 1,381,873 Federal Home Loan Mortgage Corp., 3.0%, 8/1/45 1,379,779 1,075,266 Federal Home Loan Mortgage Corp., 3.0%, 9/1/42 1,078,935 4,263,919 Federal Home Loan Mortgage Corp., 3.0%, 9/1/46 4,257,459 2,453,124 Federal Home Loan Mortgage Corp., 3.5%, 1/1/47 2,522,130 2,671,735 Federal Home Loan Mortgage Corp., 3.5%, 10/1/44 2,749,499 7,235,547 Federal Home Loan Mortgage Corp., 3.5%, 10/1/45 7,479,428 8,202,943 Federal Home Loan Mortgage Corp., 3.5%, 10/1/45 8,433,692 1,715,725 Federal Home Loan Mortgage Corp., 3.5%, 11/1/28 1,796,927 127,536 Federal Home Loan Mortgage Corp., 3.5%, 11/1/44 131,124 8,509,351 Federal Home Loan Mortgage Corp., 3.5%, 11/1/45 8,761,481 7,127,324 Federal Home Loan Mortgage Corp., 3.5%, 12/1/44 7,327,816 4,000,288 Federal Home Loan Mortgage Corp., 3.5%, 12/1/46 4,112,817 12,007,720 Federal Home Loan Mortgage Corp., 3.5%, 12/1/46 12,412,019 306,280 Federal Home Loan Mortgage Corp., 3.5%, 3/1/26 319,196 3,484,864 Federal Home Loan Mortgage Corp., 3.5%, 3/1/45 3,582,893 4,281,608 Federal Home Loan Mortgage Corp., 3.5%, 3/1/46 4,402,050 1,775,545 Federal Home Loan Mortgage Corp., 3.5%, 4/1/42 1,832,095 The accompanying notes are an integral part of these financial statements. 58 Pioneer Bond Fund | Annual Report | 6/30/17 ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 864,433 Federal Home Loan Mortgage Corp., 3.5%, 4/1/45 $ 888,749 7,191,564 Federal Home Loan Mortgage Corp., 3.5%, 5/1/46 7,393,863 8,402,975 Federal Home Loan Mortgage Corp., 3.5%, 6/1/45 8,688,259 727,886 Federal Home Loan Mortgage Corp., 3.5%, 6/1/47 751,028 1,975,000 Federal Home Loan Mortgage Corp., 3.5%, 6/1/47 2,030,557 4,200,000 Federal Home Loan Mortgage Corp., 3.5%, 6/1/47 4,318,146 7,694,881 Federal Home Loan Mortgage Corp., 3.5%, 7/1/44 7,926,560 228,998 Federal Home Loan Mortgage Corp., 3.5%, 7/1/45 236,810 7,251,562 Federal Home Loan Mortgage Corp., 3.5%, 7/1/46 7,508,481 9,815,000 Federal Home Loan Mortgage Corp., 3.5%, 7/1/47 10,124,786 3,067,479 Federal Home Loan Mortgage Corp., 3.5%, 8/1/43 3,164,941 878,216 Federal Home Loan Mortgage Corp., 3.5%, 8/1/44 904,364 10,257,034 Federal Home Loan Mortgage Corp., 3.5%, 8/1/46 10,602,371 10,795,901 Federal Home Loan Mortgage Corp., 3.5%, 8/1/46 11,137,192 12,584,034 Federal Home Loan Mortgage Corp., 3.5%, 8/1/46 12,984,336 657,227 Federal Home Loan Mortgage Corp., 3.5%, 9/1/44 679,508 1,857,294 Federal Home Loan Mortgage Corp., 4.0%, 1/1/44 1,955,585 1,933,047 Federal Home Loan Mortgage Corp., 4.0%, 1/1/46 2,034,547 5,427,267 Federal Home Loan Mortgage Corp., 4.0%, 10/1/42 5,730,201 165,723 Federal Home Loan Mortgage Corp., 4.0%, 10/1/46 174,425 10,729,896 Federal Home Loan Mortgage Corp., 4.0%, 11/1/41 11,483,447 115,750 Federal Home Loan Mortgage Corp., 4.0%, 11/1/42 122,234 1,642,366 Federal Home Loan Mortgage Corp., 4.0%, 12/1/44 1,728,602 6,007,850 Federal Home Loan Mortgage Corp., 4.0%, 12/1/45 6,323,307 589,326 Federal Home Loan Mortgage Corp., 4.0%, 2/1/44 623,955 1,309,947 Federal Home Loan Mortgage Corp., 4.0%, 3/1/47 1,378,730 1,584,916 Federal Home Loan Mortgage Corp., 4.0%, 4/1/45 1,668,136 2,376,460 Federal Home Loan Mortgage Corp., 4.0%, 4/1/47 2,513,318 3,779,331 Federal Home Loan Mortgage Corp., 4.0%, 4/1/47 3,996,977 7,566,864 Federal Home Loan Mortgage Corp., 4.0%, 4/1/47 7,964,182 7,784,800 Federal Home Loan Mortgage Corp., 4.0%, 4/1/47 8,233,097 12,228,704 Federal Home Loan Mortgage Corp., 4.0%, 4/1/47 12,870,804 5,480,286 Federal Home Loan Mortgage Corp., 4.0%, 5/1/44 5,768,043 283,339 Federal Home Loan Mortgage Corp., 4.0%, 5/1/46 298,216 603,073 Federal Home Loan Mortgage Corp., 4.0%, 5/1/46 634,739 13,365,110 Federal Home Loan Mortgage Corp., 4.0%, 5/1/47 14,066,879 330,189 Federal Home Loan Mortgage Corp., 4.0%, 6/1/42 347,846 5,063,175 Federal Home Loan Mortgage Corp., 4.0%, 6/1/44 5,329,030 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/17 59 Schedule of Investments | 6/30/17 (continued) ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 4,869,359 Federal Home Loan Mortgage Corp., 4.0%, 6/1/46 $ 5,125,038 1,658,619 Federal Home Loan Mortgage Corp., 4.0%, 6/1/47 1,745,709 131,220 Federal Home Loan Mortgage Corp., 4.0%, 7/1/42 138,571 1,133,869 Federal Home Loan Mortgage Corp., 4.0%, 7/1/44 1,200,412 1,561,306 Federal Home Loan Mortgage Corp., 4.0%, 7/1/44 1,653,041 1,857,140 Federal Home Loan Mortgage Corp., 4.0%, 7/1/44 1,966,260 7,346,372 Federal Home Loan Mortgage Corp., 4.0%, 7/1/44 7,732,113 6,492,831 Federal Home Loan Mortgage Corp., 4.0%, 7/1/46 6,833,754 6,470,878 Federal Home Loan Mortgage Corp., 4.0%, 8/1/46 6,810,648 2,955,393 Federal Home Loan Mortgage Corp., 4.0%, 9/1/44 3,110,574 7,496,615 Federal Home Loan Mortgage Corp., 4.0%, 9/1/44 7,937,113 166,790 Federal Home Loan Mortgage Corp., 4.5%, 10/1/20 172,403 3,121,124 Federal Home Loan Mortgage Corp., 4.5%, 11/1/40 3,356,403 190,086 Federal Home Loan Mortgage Corp., 4.5%, 11/1/43 203,583 73,136 Federal Home Loan Mortgage Corp., 4.5%, 3/1/20 75,024 1,858,021 Federal Home Loan Mortgage Corp., 4.5%, 3/1/42 1,997,576 4,233,382 Federal Home Loan Mortgage Corp., 4.5%, 3/1/42 4,547,287 8,134,812 Federal Home Loan Mortgage Corp., 4.5%, 5/1/47 8,730,344 428,908 Federal Home Loan Mortgage Corp., 5.0%, 10/1/20 443,280 329,506 Federal Home Loan Mortgage Corp., 5.0%, 10/1/38 360,880 11,805 Federal Home Loan Mortgage Corp., 5.0%, 11/1/34 12,932 13,693 Federal Home Loan Mortgage Corp., 5.0%, 12/1/21 14,252 164,197 Federal Home Loan Mortgage Corp., 5.0%, 6/1/35 178,239 339,442 Federal Home Loan Mortgage Corp., 5.0%, 9/1/38 371,797 10,249 Federal Home Loan Mortgage Corp., 5.5%, 1/1/34 11,452 10,438 Federal Home Loan Mortgage Corp., 5.5%, 11/1/34 11,500 101,836 Federal Home Loan Mortgage Corp., 5.5%, 11/1/34 114,156 25,018 Federal Home Loan Mortgage Corp., 5.5%, 11/1/35 27,720 66,870 Federal Home Loan Mortgage Corp., 5.5%, 12/1/18 67,828 1,163,244 Federal Home Loan Mortgage Corp., 5.5%, 6/1/41 1,297,147 94,376 Federal Home Loan Mortgage Corp., 5.5%, 8/1/35 104,399 208,856 Federal Home Loan Mortgage Corp., 5.5%, 9/1/33 233,535 46,838 Federal Home Loan Mortgage Corp., 6.0%, 1/1/33 52,630 80,649 Federal Home Loan Mortgage Corp., 6.0%, 1/1/33 90,955 29,092 Federal Home Loan Mortgage Corp., 6.0%, 1/1/34 33,008 35,576 Federal Home Loan Mortgage Corp., 6.0%, 1/1/34 39,975 71,735 Federal Home Loan Mortgage Corp., 6.0%, 1/1/38 80,658 15,988 Federal Home Loan Mortgage Corp., 6.0%, 11/1/33 18,184 33,711 Federal Home Loan Mortgage Corp., 6.0%, 11/1/33 38,188 8,897 Federal Home Loan Mortgage Corp., 6.0%, 12/1/33 9,997 The accompanying notes are an integral part of these financial statements. 60 Pioneer Bond Fund | Annual Report | 6/30/17 ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 114,016 Federal Home Loan Mortgage Corp., 6.0%, 12/1/33 $ 128,116 119,751 Federal Home Loan Mortgage Corp., 6.0%, 12/1/33 134,560 36,098 Federal Home Loan Mortgage Corp., 6.0%, 12/1/36 40,888 4,603 Federal Home Loan Mortgage Corp., 6.0%, 2/1/33 5,236 48,782 Federal Home Loan Mortgage Corp., 6.0%, 2/1/33 55,579 36,304 Federal Home Loan Mortgage Corp., 6.0%, 3/1/33 40,793 148,384 Federal Home Loan Mortgage Corp., 6.0%, 3/1/33 168,826 33,580 Federal Home Loan Mortgage Corp., 6.0%, 4/1/35 37,733 159,319 Federal Home Loan Mortgage Corp., 6.0%, 4/1/36 179,624 141,863 Federal Home Loan Mortgage Corp., 6.0%, 5/1/34 160,006 431,700 Federal Home Loan Mortgage Corp., 6.0%, 5/1/34 489,806 84,566 Federal Home Loan Mortgage Corp., 6.0%, 6/1/35 95,023 107,945 Federal Home Loan Mortgage Corp., 6.0%, 6/1/35 121,294 12,523 Federal Home Loan Mortgage Corp., 6.0%, 7/1/36 14,203 33,839 Federal Home Loan Mortgage Corp., 6.0%, 7/1/36 38,024 98,435 Federal Home Loan Mortgage Corp., 6.0%, 7/1/38 111,344 3,440 Federal Home Loan Mortgage Corp., 6.0%, 8/1/18 3,866 93,671 Federal Home Loan Mortgage Corp., 6.0%, 8/1/34 106,008 104,020 Federal Home Loan Mortgage Corp., 6.0%, 9/1/33 118,019 157 Federal Home Loan Mortgage Corp., 6.5%, 1/1/31 174 244 Federal Home Loan Mortgage Corp., 6.5%, 1/1/33 270 38,129 Federal Home Loan Mortgage Corp., 6.5%, 10/1/33 44,503 328 Federal Home Loan Mortgage Corp., 6.5%, 11/1/30 362 3,385 Federal Home Loan Mortgage Corp., 6.5%, 2/1/33 3,764 476 Federal Home Loan Mortgage Corp., 6.5%, 3/1/31 526 5,193 Federal Home Loan Mortgage Corp., 6.5%, 3/1/31 5,740 5,166 Federal Home Loan Mortgage Corp., 6.5%, 5/1/31 5,719 7,210 Federal Home Loan Mortgage Corp., 6.5%, 5/1/31 8,014 186 Federal Home Loan Mortgage Corp., 6.5%, 6/1/32 206 10,155 Federal Home Loan Mortgage Corp., 6.5%, 7/1/32 11,469 679 Federal Home Loan Mortgage Corp., 6.5%, 8/1/31 758 3,979 Federal Home Loan Mortgage Corp., 6.5%, 8/1/31 4,398 74,169 Federal Home Loan Mortgage Corp., 7.0%, 10/1/46 80,366 2,612 Federal Home Loan Mortgage Corp., 7.0%, 11/1/30 3,021 3,048 Federal Home Loan Mortgage Corp., 7.0%, 6/1/31 3,056 11,245 Federal Home Loan Mortgage Corp., 7.0%, 8/1/22 11,274 83,984 Federal Home Loan Mortgage Corp., 7.0%, 9/1/22 89,065 235,895 Federal National Mortgage Association, 2.5%, 4/1/45 227,614 463,314 Federal National Mortgage Association, 3.0%, 12/1/21 475,854 1,456,996 Federal National Mortgage Association, 3.0%, 4/1/31 1,496,433 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/17 61 Schedule of Investments | 6/30/17 (continued) ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 7,340,028 Federal National Mortgage Association, 3.5%, 7/1/46 $ 7,543,340 6,035,503 Federal National Mortgage Association, 4.0%, 10/1/45 6,347,626 303,838 Federal National Mortgage Association, 4.0%, 11/1/34 322,393 799,581 Federal National Mortgage Association, 5.0%, 8/1/40 874,538 814,908 Government National Mortgage Association I, 3.5%, 1/15/44 847,576 12,233,927 Government National Mortgage Association I, 3.5%, 1/15/45 12,682,330 1,598,913 Government National Mortgage Association I, 3.5%, 10/15/42 1,661,498 9,792,676 Government National Mortgage Association I, 3.5%, 11/15/41 10,174,573 8,061,807 Government National Mortgage Association I, 3.5%, 7/15/42 8,372,461 3,082,658 Government National Mortgage Association I, 3.5%, 8/15/46 3,197,891 22,647 Government National Mortgage Association I, 4.0%, 1/15/41 23,867 79,692 Government National Mortgage Association I, 4.0%, 1/15/41 83,986 500,531 Government National Mortgage Association I, 4.0%, 1/15/45 529,740 1,368,812 Government National Mortgage Association I, 4.0%, 1/15/45 1,440,974 1,638,072 Government National Mortgage Association I, 4.0%, 1/15/45 1,724,428 2,598,645 Government National Mortgage Association I, 4.0%, 1/15/45 2,735,641 7,135 Government National Mortgage Association I, 4.0%, 10/15/40 7,530 5,568 Government National Mortgage Association I, 4.0%, 10/15/41 5,861 6,975 Government National Mortgage Association I, 4.0%, 10/15/41 7,349 141,132 Government National Mortgage Association I, 4.0%, 10/15/44 148,572 11,758 Government National Mortgage Association I, 4.0%, 11/15/40 12,381 37,244 Government National Mortgage Association I, 4.0%, 11/15/40 39,256 3,534 Government National Mortgage Association I, 4.0%, 11/15/41 3,721 The accompanying notes are an integral part of these financial statements. 62 Pioneer Bond Fund | Annual Report | 6/30/17 ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 5,395 Government National Mortgage Association I, 4.0%, 11/15/41 $ 5,685 25,865 Government National Mortgage Association I, 4.0%, 11/15/43 27,314 563,371 Government National Mortgage Association I, 4.0%, 11/15/44 593,071 7,036 Government National Mortgage Association I, 4.0%, 12/15/41 7,429 2,306,652 Government National Mortgage Association I, 4.0%, 12/15/44 2,428,254 9,903 Government National Mortgage Association I, 4.0%, 2/15/41 10,457 26,194 Government National Mortgage Association I, 4.0%, 2/15/42 27,574 215,782 Government National Mortgage Association I, 4.0%, 2/15/42 227,158 1,302,232 Government National Mortgage Association I, 4.0%, 2/15/45 1,370,883 1,939,363 Government National Mortgage Association I, 4.0%, 2/15/45 2,041,603 14,127 Government National Mortgage Association I, 4.0%, 3/15/44 14,872 297,270 Government National Mortgage Association I, 4.0%, 3/15/44 312,941 1,090,208 Government National Mortgage Association I, 4.0%, 3/15/44 1,147,682 4,480,580 Government National Mortgage Association I, 4.0%, 3/15/44 4,716,788 161,155 Government National Mortgage Association I, 4.0%, 3/15/45 169,651 2,496,894 Government National Mortgage Association I, 4.0%, 3/15/45 2,628,526 9,554 Government National Mortgage Association I, 4.0%, 4/15/44 10,058 29,494 Government National Mortgage Association I, 4.0%, 4/15/44 31,049 3,055,419 Government National Mortgage Association I, 4.0%, 4/15/44 3,216,495 4,169,750 Government National Mortgage Association I, 4.0%, 4/15/45 4,390,739 7,772 Government National Mortgage Association I, 4.0%, 5/15/39 8,182 2,002,050 Government National Mortgage Association I, 4.0%, 5/15/45 2,107,594 4,653 Government National Mortgage Association I, 4.0%, 6/15/39 4,898 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/17 63 Schedule of Investments | 6/30/17 (continued) ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 54,035 Government National Mortgage Association I, 4.0%, 6/15/41 $ 56,883 6,057,878 Government National Mortgage Association I, 4.0%, 6/15/45 6,377,238 161,950 Government National Mortgage Association I, 4.0%, 7/15/41 170,952 813,985 Government National Mortgage Association I, 4.0%, 7/15/45 857,224 7,868 Government National Mortgage Association I, 4.0%, 8/15/40 8,305 283,165 Government National Mortgage Association I, 4.0%, 8/15/40 298,995 1,321,172 Government National Mortgage Association I, 4.0%, 8/15/43 1,394,378 431,133 Government National Mortgage Association I, 4.0%, 8/15/44 453,862 709,466 Government National Mortgage Association I, 4.0%, 8/15/45 749,979 7,230 Government National Mortgage Association I, 4.0%, 9/15/40 7,635 97,899 Government National Mortgage Association I, 4.0%, 9/15/40 103,071 2,592 Government National Mortgage Association I, 4.0%, 9/15/41 2,729 452,357 Government National Mortgage Association I, 4.0%, 9/15/41 476,837 71,165 Government National Mortgage Association I, 4.0%, 9/15/44 74,917 301,780 Government National Mortgage Association I, 4.0%, 9/15/44 317,689 353,063 Government National Mortgage Association I, 4.0%, 9/15/44 371,675 707,229 Government National Mortgage Association I, 4.0%, 9/15/44 744,513 3,016,367 Government National Mortgage Association I, 4.0%, 9/15/44 3,175,384 399,034 Government National Mortgage Association I, 4.5%, 1/15/40 435,662 157,645 Government National Mortgage Association I, 4.5%, 10/15/33 169,059 178,070 Government National Mortgage Association I, 4.5%, 10/15/33 192,937 112,501 Government National Mortgage Association I, 4.5%, 10/15/35 120,952 1,077,725 Government National Mortgage Association I, 4.5%, 10/15/40 1,161,706 The accompanying notes are an integral part of these financial statements. 64 Pioneer Bond Fund | Annual Report | 6/30/17 ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 11,649 Government National Mortgage Association I, 4.5%, 12/15/19 $ 12,013 889,482 Government National Mortgage Association I, 4.5%, 12/15/39 956,791 34,380 Government National Mortgage Association I, 4.5%, 2/15/34 37,156 16,104 Government National Mortgage Association I, 4.5%, 3/15/35 17,262 57,868 Government National Mortgage Association I, 4.5%, 3/15/35 62,028 4,216 Government National Mortgage Association I, 4.5%, 4/15/18 4,284 13,905 Government National Mortgage Association I, 4.5%, 4/15/20 14,354 20,862 Government National Mortgage Association I, 4.5%, 4/15/35 22,362 198,855 Government National Mortgage Association I, 4.5%, 4/15/35 215,371 60,338 Government National Mortgage Association I, 4.5%, 4/15/38 64,675 556,915 Government National Mortgage Association I, 4.5%, 4/15/41 600,582 1,017,792 Government National Mortgage Association I, 4.5%, 5/15/41 1,103,178 15,423 Government National Mortgage Association I, 4.5%, 6/15/19 15,724 212,977 Government National Mortgage Association I, 4.5%, 6/15/25 224,623 928,628 Government National Mortgage Association I, 4.5%, 6/15/41 1,006,254 62,036 Government National Mortgage Association I, 4.5%, 7/15/33 66,549 350,753 Government National Mortgage Association I, 4.5%, 7/15/41 380,254 4,875 Government National Mortgage Association I, 4.5%, 8/15/19 5,002 973,538 Government National Mortgage Association I, 4.5%, 8/15/41 1,055,037 185,495 Government National Mortgage Association I, 4.5%, 9/15/33 202,317 14,026 Government National Mortgage Association I, 4.5%, 9/15/35 15,034 244,633 Government National Mortgage Association I, 4.5%, 9/15/40 266,521 31,251 Government National Mortgage Association I, 5.0%, 10/15/18 31,753 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/17 65 Schedule of Investments | 6/30/17 (continued) ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 20,347 Government National Mortgage Association I, 5.0%, 2/15/19 $ 20,761 87,178 Government National Mortgage Association I, 5.0%, 4/15/34 95,792 417,690 Government National Mortgage Association I, 5.0%, 4/15/35 465,366 446 Government National Mortgage Association I, 5.0%, 7/15/19 469 34,391 Government National Mortgage Association I, 5.0%, 7/15/19 35,251 71,873 Government National Mortgage Association I, 5.0%, 7/15/33 79,234 206,750 Government National Mortgage Association I, 5.0%, 7/15/40 226,927 71,656 Government National Mortgage Association I, 5.0%, 9/15/33 79,486 50,166 Government National Mortgage Association I, 5.5%, 1/15/29 55,804 126,072 Government National Mortgage Association I, 5.5%, 1/15/35 141,948 1,960 Government National Mortgage Association I, 5.5%, 10/15/17 1,963 5,341 Government National Mortgage Association I, 5.5%, 10/15/17 5,351 22,814 Government National Mortgage Association I, 5.5%, 10/15/19 23,294 61,598 Government National Mortgage Association I, 5.5%, 10/15/33 69,332 64,551 Government National Mortgage Association I, 5.5%, 10/15/33 72,638 35,663 Government National Mortgage Association I, 5.5%, 10/15/34 39,704 71,689 Government National Mortgage Association I, 5.5%, 10/15/35 79,789 170,365 Government National Mortgage Association I, 5.5%, 10/15/35 191,864 13,624 Government National Mortgage Association I, 5.5%, 11/15/18 13,807 133,929 Government National Mortgage Association I, 5.5%, 11/15/19 136,992 379,037 Government National Mortgage Association I, 5.5%, 11/15/34 426,589 7,318 Government National Mortgage Association I, 5.5%, 12/15/18 7,416 15,955 Government National Mortgage Association I, 5.5%, 2/15/18 16,000 The accompanying notes are an integral part of these financial statements. 66 Pioneer Bond Fund | Annual Report | 6/30/17 ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 17,686 Government National Mortgage Association I, 5.5%, 2/15/18 $ 17,785 30,788 Government National Mortgage Association I, 5.5%, 2/15/35 34,646 38,376 Government National Mortgage Association I, 5.5%, 2/15/35 42,689 38,868 Government National Mortgage Association I, 5.5%, 2/15/37 43,598 848 Government National Mortgage Association I, 5.5%, 4/15/19 863 7,639 Government National Mortgage Association I, 5.5%, 4/15/19 7,679 5,597 Government National Mortgage Association I, 5.5%, 6/15/18 5,619 12,340 Government National Mortgage Association I, 5.5%, 6/15/33 13,883 65,022 Government National Mortgage Association I, 5.5%, 6/15/35 72,330 66,414 Government National Mortgage Association I, 5.5%, 7/15/33 74,823 71,858 Government National Mortgage Association I, 5.5%, 7/15/33 80,885 333,142 Government National Mortgage Association I, 5.5%, 7/15/34 375,295 434,448 Government National Mortgage Association I, 5.5%, 7/15/35 502,459 49,712 Government National Mortgage Association I, 5.5%, 8/15/19 50,609 62,911 Government National Mortgage Association I, 5.5%, 8/15/19 64,214 19,092 Government National Mortgage Association I, 5.5%, 8/15/33 21,411 30,833 Government National Mortgage Association I, 5.5%, 8/15/33 34,705 151,311 Government National Mortgage Association I, 5.5%, 8/15/33 169,614 72,440 Government National Mortgage Association I, 5.5%, 9/15/19 73,954 57,300 Government National Mortgage Association I, 5.5%, 9/15/33 64,051 96,864 Government National Mortgage Association I, 5.5%, 9/15/33 108,573 14,607 Government National Mortgage Association I, 5.72%, 4/15/29 16,301 5,181 Government National Mortgage Association I, 6.0%, 1/15/19 5,210 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/17 67 Schedule of Investments | 6/30/17 (continued) ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 12,817 Government National Mortgage Association I, 6.0%, 1/15/24 $ 14,449 34,783 Government National Mortgage Association I, 6.0%, 1/15/33 39,212 34,365 Government National Mortgage Association I, 6.0%, 1/15/33 39,340 155,638 Government National Mortgage Association I, 6.0%, 1/15/33 179,079 7,050 Government National Mortgage Association I, 6.0%, 10/15/28 7,975 11,092 Government National Mortgage Association I, 6.0%, 10/15/32 12,505 34,459 Government National Mortgage Association I, 6.0%, 10/15/32 38,847 39,992 Government National Mortgage Association I, 6.0%, 10/15/32 46,078 39,669 Government National Mortgage Association I, 6.0%, 10/15/33 45,141 63,735 Government National Mortgage Association I, 6.0%, 10/15/34 71,908 81,500 Government National Mortgage Association I, 6.0%, 10/15/34 92,724 166,486 Government National Mortgage Association I, 6.0%, 10/15/34 187,682 123,864 Government National Mortgage Association I, 6.0%, 10/15/36 140,777 25,217 Government National Mortgage Association I, 6.0%, 11/15/31 28,495 6,512 Government National Mortgage Association I, 6.0%, 11/15/32 7,341 7,114 Government National Mortgage Association I, 6.0%, 11/15/32 8,020 97,575 Government National Mortgage Association I, 6.0%, 11/15/33 109,998 104,740 Government National Mortgage Association I, 6.0%, 11/15/34 119,240 38,052 Government National Mortgage Association I, 6.0%, 11/15/37 42,897 125,472 Government National Mortgage Association I, 6.0%, 12/15/23 131,595 11,006 Government National Mortgage Association I, 6.0%, 12/15/32 12,408 13,308 Government National Mortgage Association I, 6.0%, 12/15/32 15,095 77,024 Government National Mortgage Association I, 6.0%, 12/15/32 86,910 The accompanying notes are an integral part of these financial statements. 68 Pioneer Bond Fund | Annual Report | 6/30/17 ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 138,418 Government National Mortgage Association I, 6.0%, 12/15/32 $ 156,041 196,540 Government National Mortgage Association I, 6.0%, 12/15/32 221,562 215,985 Government National Mortgage Association I, 6.0%, 12/15/32 243,564 388,910 Government National Mortgage Association I, 6.0%, 12/15/32 443,108 62,010 Government National Mortgage Association I, 6.0%, 2/15/29 71,247 86,505 Government National Mortgage Association I, 6.0%, 2/15/29 98,272 21,935 Government National Mortgage Association I, 6.0%, 2/15/33 24,728 32,024 Government National Mortgage Association I, 6.0%, 2/15/33 36,475 69,751 Government National Mortgage Association I, 6.0%, 2/15/33 78,635 83,031 Government National Mortgage Association I, 6.0%, 2/15/33 95,928 125,182 Government National Mortgage Association I, 6.0%, 2/15/33 141,826 18,836 Government National Mortgage Association I, 6.0%, 3/15/19 18,982 1,602 Government National Mortgage Association I, 6.0%, 3/15/32 1,819 42,976 Government National Mortgage Association I, 6.0%, 3/15/33 48,897 53,128 Government National Mortgage Association I, 6.0%, 3/15/33 59,918 93,623 Government National Mortgage Association I, 6.0%, 3/15/33 106,658 94,887 Government National Mortgage Association I, 6.0%, 3/15/33 106,968 107,474 Government National Mortgage Association I, 6.0%, 3/15/33 122,359 134,659 Government National Mortgage Association I, 6.0%, 3/15/33 152,946 234,438 Government National Mortgage Association I, 6.0%, 3/15/33 266,810 381,562 Government National Mortgage Association I, 6.0%, 3/15/33 449,946 178,712 Government National Mortgage Association I, 6.0%, 3/15/34 210,390 40,818 Government National Mortgage Association I, 6.0%, 4/15/28 46,451 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/17 69 Schedule of Investments | 6/30/17 (continued) ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 16,887 Government National Mortgage Association I, 6.0%, 4/15/33 $ 19,037 31,316 Government National Mortgage Association I, 6.0%, 4/15/33 35,316 44,211 Government National Mortgage Association I, 6.0%, 4/15/33 50,189 18,399 Government National Mortgage Association I, 6.0%, 5/15/33 20,741 148,703 Government National Mortgage Association I, 6.0%, 5/15/33 172,443 106,869 Government National Mortgage Association I, 6.0%, 6/15/31 120,511 10,683 Government National Mortgage Association I, 6.0%, 6/15/33 12,170 61,511 Government National Mortgage Association I, 6.0%, 6/15/34 70,017 6,465 Government National Mortgage Association I, 6.0%, 8/15/32 7,359 35,462 Government National Mortgage Association I, 6.0%, 8/15/34 40,302 45,477 Government National Mortgage Association I, 6.0%, 8/15/34 51,267 225,181 Government National Mortgage Association I, 6.0%, 8/15/36 255,955 48,834 Government National Mortgage Association I, 6.0%, 8/15/38 55,051 27,208 Government National Mortgage Association I, 6.0%, 9/15/19 27,391 176,920 Government National Mortgage Association I, 6.0%, 9/15/28 200,403 58,915 Government National Mortgage Association I, 6.0%, 9/15/32 67,143 91,071 Government National Mortgage Association I, 6.0%, 9/15/32 102,665 182,913 Government National Mortgage Association I, 6.0%, 9/15/32 206,200 14,965 Government National Mortgage Association I, 6.0%, 9/15/33 16,901 15,823 Government National Mortgage Association I, 6.0%, 9/15/33 17,837 51,539 Government National Mortgage Association I, 6.0%, 9/15/33 58,571 26,403 Government National Mortgage Association I, 6.0%, 9/15/34 30,090 38,034 Government National Mortgage Association I, 6.0%, 9/15/34 42,876 The accompanying notes are an integral part of these financial statements. 70 Pioneer Bond Fund | Annual Report | 6/30/17 ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 142,558 Government National Mortgage Association I, 6.0%, 9/15/34 $ 162,191 764,608 Government National Mortgage Association I, 6.0%, 9/15/35 876,139 22,932 Government National Mortgage Association I, 6.5%, 1/15/29 25,059 19,176 Government National Mortgage Association I, 6.5%, 1/15/32 20,955 82,468 Government National Mortgage Association I, 6.5%, 1/15/32 93,857 3,288 Government National Mortgage Association I, 6.5%, 1/15/33 3,799 342,263 Government National Mortgage Association I, 6.5%, 1/15/33 403,403 489 Government National Mortgage Association I, 6.5%, 1/15/35 519 21,984 Government National Mortgage Association I, 6.5%, 10/15/24 24,439 3,932 Government National Mortgage Association I, 6.5%, 10/15/28 4,306 16,018 Government National Mortgage Association I, 6.5%, 10/15/28 17,633 6,100 Government National Mortgage Association I, 6.5%, 10/15/31 6,674 20,001 Government National Mortgage Association I, 6.5%, 10/15/31 21,856 81,427 Government National Mortgage Association I, 6.5%, 10/15/31 89,970 73,792 Government National Mortgage Association I, 6.5%, 10/15/32 80,638 1,642 Government National Mortgage Association I, 6.5%, 10/15/33 1,794 3,987 Government National Mortgage Association I, 6.5%, 11/15/31 4,357 43,422 Government National Mortgage Association I, 6.5%, 11/15/31 47,450 52,859 Government National Mortgage Association I, 6.5%, 11/15/32 61,836 323,237 Government National Mortgage Association I, 6.5%, 12/15/32 380,491 7,259 Government National Mortgage Association I, 6.5%, 2/15/28 7,932 1,073 Government National Mortgage Association I, 6.5%, 2/15/29 1,172 6,027 Government National Mortgage Association I, 6.5%, 2/15/29 6,586 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/17 71 Schedule of Investments | 6/30/17 (continued) ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 18,525 Government National Mortgage Association I, 6.5%, 2/15/29 $ 20,732 8,267 Government National Mortgage Association I, 6.5%, 2/15/32 9,073 14,591 Government National Mortgage Association I, 6.5%, 2/15/32 16,513 18,585 Government National Mortgage Association I, 6.5%, 2/15/32 21,894 28,947 Government National Mortgage Association I, 6.5%, 2/15/32 31,632 39,012 Government National Mortgage Association I, 6.5%, 2/15/32 45,899 6,972 Government National Mortgage Association I, 6.5%, 2/15/34 7,618 7,902 Government National Mortgage Association I, 6.5%, 3/15/29 8,635 12,863 Government National Mortgage Association I, 6.5%, 3/15/29 14,056 56,649 Government National Mortgage Association I, 6.5%, 3/15/29 62,521 79,034 Government National Mortgage Association I, 6.5%, 3/15/29 86,365 5,032 Government National Mortgage Association I, 6.5%, 3/15/31 5,499 15,523 Government National Mortgage Association I, 6.5%, 3/15/32 16,993 80,970 Government National Mortgage Association I, 6.5%, 3/15/32 90,320 7,977 Government National Mortgage Association I, 6.5%, 4/15/28 8,717 36,447 Government National Mortgage Association I, 6.5%, 4/15/28 39,828 63,030 Government National Mortgage Association I, 6.5%, 4/15/31 73,870 6,741 Government National Mortgage Association I, 6.5%, 4/15/32 7,366 9,276 Government National Mortgage Association I, 6.5%, 4/15/32 10,216 12,372 Government National Mortgage Association I, 6.5%, 4/15/32 13,864 68,214 Government National Mortgage Association I, 6.5%, 4/15/32 80,061 5,999 Government National Mortgage Association I, 6.5%, 4/15/33 6,555 40,056 Government National Mortgage Association I, 6.5%, 4/15/35 43,772 The accompanying notes are an integral part of these financial statements. 72 Pioneer Bond Fund | Annual Report | 6/30/17 ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 3,196 Government National Mortgage Association I, 6.5%, 5/15/29 $ 3,510 4,530 Government National Mortgage Association I, 6.5%, 5/15/29 4,950 60,315 Government National Mortgage Association I, 6.5%, 5/15/29 69,730 15,355 Government National Mortgage Association I, 6.5%, 5/15/31 17,790 16,834 Government National Mortgage Association I, 6.5%, 5/15/31 19,729 38,323 Government National Mortgage Association I, 6.5%, 5/15/31 41,920 4,543 Government National Mortgage Association I, 6.5%, 5/15/32 5,020 5,623 Government National Mortgage Association I, 6.5%, 5/15/32 6,144 11,276 Government National Mortgage Association I, 6.5%, 5/15/32 12,573 14,385 Government National Mortgage Association I, 6.5%, 5/15/32 16,923 30,812 Government National Mortgage Association I, 6.5%, 5/15/33 33,850 8,505 Government National Mortgage Association I, 6.5%, 6/15/28 9,799 25,085 Government National Mortgage Association I, 6.5%, 6/15/29 27,412 6,234 Government National Mortgage Association I, 6.5%, 6/15/31 6,840 10,138 Government National Mortgage Association I, 6.5%, 6/15/32 11,079 11,701 Government National Mortgage Association I, 6.5%, 6/15/32 13,042 13,267 Government National Mortgage Association I, 6.5%, 6/15/32 14,589 110,426 Government National Mortgage Association I, 6.5%, 6/15/34 121,517 6,444 Government National Mortgage Association I, 6.5%, 6/15/35 7,042 18,418 Government National Mortgage Association I, 6.5%, 7/15/31 20,127 8,772 Government National Mortgage Association I, 6.5%, 7/15/32 9,586 9,992 Government National Mortgage Association I, 6.5%, 7/15/32 10,953 10,823 Government National Mortgage Association I, 6.5%, 7/15/32 11,827 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/17 73 Schedule of Investments | 6/30/17 (continued) ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 125,801 Government National Mortgage Association I, 6.5%, 7/15/32 $ 148,589 18,073 Government National Mortgage Association I, 6.5%, 7/15/35 19,749 63,826 Government National Mortgage Association I, 6.5%, 7/15/35 69,747 6,784 Government National Mortgage Association I, 6.5%, 8/15/28 7,532 49,579 Government National Mortgage Association I, 6.5%, 8/15/31 54,850 3,768 Government National Mortgage Association I, 6.5%, 8/15/32 4,159 38,163 Government National Mortgage Association I, 6.5%, 8/15/32 45,014 44,603 Government National Mortgage Association I, 6.5%, 8/15/32 49,046 18,180 Government National Mortgage Association I, 6.5%, 9/15/31 19,966 18,482 Government National Mortgage Association I, 6.5%, 9/15/32 21,213 39,104 Government National Mortgage Association I, 6.5%, 9/15/32 43,580 42,024 Government National Mortgage Association I, 6.5%, 9/15/32 46,786 3,986 Government National Mortgage Association I, 6.5%, 9/15/34 4,356 4,806 Government National Mortgage Association I, 6.75%, 4/15/26 5,252 17,459 Government National Mortgage Association I, 7.0%, 1/15/28 19,131 42,773 Government National Mortgage Association I, 7.0%, 1/15/31 43,405 6,781 Government National Mortgage Association I, 7.0%, 10/15/31 6,977 8,564 Government National Mortgage Association I, 7.0%, 11/15/26 9,829 14,965 Government National Mortgage Association I, 7.0%, 11/15/28 17,524 44,065 Government National Mortgage Association I, 7.0%, 11/15/28 50,508 55,286 Government National Mortgage Association I, 7.0%, 11/15/29 61,004 8,136 Government National Mortgage Association I, 7.0%, 11/15/31 8,524 3,379 Government National Mortgage Association I, 7.0%, 12/15/30 3,529 The accompanying notes are an integral part of these financial statements. 74 Pioneer Bond Fund | Annual Report | 6/30/17 ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 10,064 Government National Mortgage Association I, 7.0%, 12/15/30 $ 11,032 38,371 Government National Mortgage Association I, 7.0%, 12/15/30 39,080 35,014 Government National Mortgage Association I, 7.0%, 12/15/30 41,263 17,181 Government National Mortgage Association I, 7.0%, 2/15/28 18,579 12,749 Government National Mortgage Association I, 7.0%, 3/15/28 13,109 10,305 Government National Mortgage Association I, 7.0%, 3/15/31 10,845 52,386 Government National Mortgage Association I, 7.0%, 3/15/32 57,747 12,121 Government National Mortgage Association I, 7.0%, 4/15/28 13,117 22,461 Government National Mortgage Association I, 7.0%, 4/15/29 23,193 25,819 Government National Mortgage Association I, 7.0%, 4/15/29 28,087 44,965 Government National Mortgage Association I, 7.0%, 4/15/32 49,907 36,809 Government National Mortgage Association I, 7.0%, 5/15/29 38,493 8,114 Government National Mortgage Association I, 7.0%, 5/15/31 8,527 80,598 Government National Mortgage Association I, 7.0%, 5/15/32 97,073 19,386 Government National Mortgage Association I, 7.0%, 6/15/27 22,293 4,214 Government National Mortgage Association I, 7.0%, 6/15/29 4,225 26,884 Government National Mortgage Association I, 7.0%, 6/15/31 31,988 23,356 Government National Mortgage Association I, 7.0%, 7/15/25 25,831 5,402 Government National Mortgage Association I, 7.0%, 7/15/28 5,416 15,801 Government National Mortgage Association I, 7.0%, 7/15/28 17,620 10,855 Government National Mortgage Association I, 7.0%, 7/15/29 12,220 3,138 Government National Mortgage Association I, 7.0%, 7/15/31 3,723 18,931 Government National Mortgage Association I, 7.0%, 8/15/23 20,213 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/17 75 Schedule of Investments | 6/30/17 (continued) ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 1,311 Government National Mortgage Association I, 7.0%, 8/15/28 $ 1,484 144,853 Government National Mortgage Association I, 7.0%, 8/15/31 173,384 55,403 Government National Mortgage Association I, 7.0%, 9/15/24 61,717 12,476 Government National Mortgage Association I, 7.0%, 9/15/31 13,177 34,093 Government National Mortgage Association I, 7.0%, 9/15/31 37,568 29,730 Government National Mortgage Association I, 7.5%, 10/15/23 32,203 45,319 Government National Mortgage Association I, 7.5%, 10/15/27 50,754 5,880 Government National Mortgage Association I, 7.5%, 10/15/29 6,127 12,345 Government National Mortgage Association I, 7.5%, 10/15/29 13,753 3,919 Government National Mortgage Association I, 7.5%, 12/15/25 4,041 43,720 Government National Mortgage Association I, 7.5%, 12/15/31 45,862 1,643 Government National Mortgage Association I, 7.5%, 2/15/26 1,703 14,356 Government National Mortgage Association I, 7.5%, 2/15/27 15,781 14,296 Government National Mortgage Association I, 7.5%, 2/15/31 14,486 15,795 Government National Mortgage Association I, 7.5%, 2/15/31 16,320 7,655 Government National Mortgage Association I, 7.5%, 3/15/23 8,161 32,579 Government National Mortgage Association I, 7.5%, 3/15/27 38,312 7,281 Government National Mortgage Association I, 7.5%, 3/15/31 7,517 1,459 Government National Mortgage Association I, 7.5%, 6/15/24 1,500 15,839 Government National Mortgage Association I, 7.5%, 6/15/29 17,631 9,773 Government National Mortgage Association I, 7.5%, 8/15/25 9,975 876 Government National Mortgage Association I, 7.5%, 8/15/29 879 2,745 Government National Mortgage Association I, 7.5%, 8/15/29 2,800 The accompanying notes are an integral part of these financial statements. 76 Pioneer Bond Fund | Annual Report | 6/30/17 ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 16,995 Government National Mortgage Association I, 7.5%, 8/15/29 $ 17,827 1,140 Government National Mortgage Association I, 7.5%, 9/15/25 1,142 4,714 Government National Mortgage Association I, 7.5%, 9/15/25 5,156 18,430 Government National Mortgage Association I, 7.5%, 9/15/29 18,486 2,206 Government National Mortgage Association I, 7.75%, 2/15/30 2,245 13,331 Government National Mortgage Association I, 8.25%, 5/15/20 13,866 1,553 Government National Mortgage Association I, 8.5%, 8/15/21 1,559 4,234 Government National Mortgage Association I, 9.0%, 1/15/20 4,285 717 Government National Mortgage Association I, 9.0%, 12/15/19 748 1,791 Government National Mortgage Association I, 9.0%, 6/15/22 1,838 189 Government National Mortgage Association I, 9.0%, 9/15/21 193 4,217,343 Government National Mortgage Association II, 3.0%, 8/20/46 4,264,312 13,337,677 Government National Mortgage Association II, 3.0%, 9/20/46 13,486,220 6,678,355 Government National Mortgage Association II, 3.5%, 1/20/46 6,924,598 10,239,698 Government National Mortgage Association II, 3.5%, 1/20/47 10,617,254 10,089,872 Government National Mortgage Association II, 3.5%, 11/20/46 10,461,905 835,663 Government National Mortgage Association II, 3.5%, 3/20/45 866,819 1,741,424 Government National Mortgage Association II, 3.5%, 3/20/46 1,812,923 517,556 Government National Mortgage Association II, 3.5%, 4/20/45 537,521 1,034,088 Government National Mortgage Association II, 3.5%, 4/20/45 1,072,031 1,421,396 Government National Mortgage Association II, 3.5%, 4/20/45 1,475,960 4,231,357 Government National Mortgage Association II, 3.5%, 8/20/45 4,387,375 2,111,233 Government National Mortgage Association II, 4.0%, 10/20/44 2,223,385 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/17 77 Schedule of Investments | 6/30/17 (continued) ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 8,719,483 Government National Mortgage Association II, 4.0%, 10/20/46 $ 9,182,675 8,988,503 Government National Mortgage Association II, 4.0%, 7/20/44 9,465,986 242,826 Government National Mortgage Association II, 4.0%, 9/20/44 255,725 278,898 Government National Mortgage Association II, 4.5%, 1/20/35 298,757 9,758,407 Government National Mortgage Association II, 4.5%, 1/20/47 10,376,756 2,140,918 Government National Mortgage Association II, 4.5%, 10/20/44 2,276,579 4,513,776 Government National Mortgage Association II, 4.5%, 11/20/44 4,799,795 82,089 Government National Mortgage Association II, 4.5%, 12/20/34 87,872 9,977,502 Government National Mortgage Association II, 4.5%, 2/20/47 10,612,775 46,714 Government National Mortgage Association II, 4.5%, 3/20/35 50,053 9,851,851 Government National Mortgage Association II, 4.5%, 4/20/47 10,484,503 1,377,876 Government National Mortgage Association II, 4.5%, 9/20/41 1,480,683 15,964 Government National Mortgage Association II, 5.0%, 1/20/20 16,495 33,795 Government National Mortgage Association II, 5.0%, 12/20/18 34,327 17,575 Government National Mortgage Association II, 5.0%, 2/20/19 17,875 120,591 Government National Mortgage Association II, 5.5%, 10/20/19 123,046 130,807 Government National Mortgage Association II, 5.5%, 10/20/37 143,160 190,402 Government National Mortgage Association II, 5.5%, 3/20/34 217,777 168,141 Government National Mortgage Association II, 5.5%, 4/20/34 188,269 145,990 Government National Mortgage Association II, 5.75%, 6/20/33 160,761 26,024 Government National Mortgage Association II, 5.9%, 1/20/28 28,824 39,539 Government National Mortgage Association II, 5.9%, 11/20/27 43,794 77,288 Government National Mortgage Association II, 5.9%, 7/20/28 84,993 The accompanying notes are an integral part of these financial statements. 78 Pioneer Bond Fund | Annual Report | 6/30/17 ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 87,082 Government National Mortgage Association II, 6.0%, 1/20/33 $ 101,114 18,749 Government National Mortgage Association II, 6.0%, 10/20/31 21,274 95,583 Government National Mortgage Association II, 6.0%, 10/20/33 108,374 14,648 Government National Mortgage Association II, 6.0%, 12/20/18 14,727 55,159 Government National Mortgage Association II, 6.0%, 6/20/34 62,663 7,957 Government National Mortgage Association II, 6.0%, 7/20/19 8,005 84,350 Government National Mortgage Association II, 6.45%, 1/20/33 92,368 44,196 Government National Mortgage Association II, 6.45%, 11/20/32 48,386 47,933 Government National Mortgage Association II, 6.45%, 7/20/32 52,481 22,782 Government National Mortgage Association II, 6.5%, 1/20/24 24,414 43,264 Government National Mortgage Association II, 6.5%, 10/20/32 50,844 1,997 Government National Mortgage Association II, 6.5%, 2/20/29 2,312 762 Government National Mortgage Association II, 6.5%, 3/20/29 883 58,318 Government National Mortgage Association II, 6.5%, 3/20/34 68,518 24,443 Government National Mortgage Association II, 6.5%, 4/20/29 28,321 12,717 Government National Mortgage Association II, 6.5%, 4/20/31 14,955 9,238 Government National Mortgage Association II, 6.5%, 6/20/31 10,851 40,871 Government National Mortgage Association II, 6.5%, 8/20/28 47,206 65,968 Government National Mortgage Association II, 7.0%, 1/20/29 77,064 9,702 Government National Mortgage Association II, 7.0%, 1/20/31 11,389 64,171 Government National Mortgage Association II, 7.0%, 11/20/28 75,164 9,918 Government National Mortgage Association II, 7.0%, 11/20/31 11,805 1,873 Government National Mortgage Association II, 7.0%, 12/20/30 2,238 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/17 79 Schedule of Investments | 6/30/17 (continued) ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 6,548 Government National Mortgage Association II, 7.0%, 2/20/29 $ 7,657 4,836 Government National Mortgage Association II, 7.0%, 3/20/31 5,782 8,287 Government National Mortgage Association II, 7.0%, 5/20/26 9,409 19,871 Government National Mortgage Association II, 7.0%, 6/20/28 23,256 25,024 Government National Mortgage Association II, 7.0%, 7/20/31 29,841 19,462 Government National Mortgage Association II, 7.0%, 8/20/27 22,653 6,074 Government National Mortgage Association II, 7.5%, 12/20/30 7,247 10,849 Government National Mortgage Association II, 7.5%, 5/20/30 13,173 3,013 Government National Mortgage Association II, 7.5%, 6/20/30 3,535 8,099 Government National Mortgage Association II, 7.5%, 7/20/30 9,740 11,901 Government National Mortgage Association II, 7.5%, 8/20/30 14,450 34 Government National Mortgage Association II, 8.0%, 5/20/25 37 2,351 Government National Mortgage Association II, 9.0%, 11/20/24 2,360 2,211 Government National Mortgage Association II, 9.0%, 3/20/22 2,219 309 Government National Mortgage Association II, 9.0%, 4/20/22 310 395 Government National Mortgage Association II, 9.0%, 9/20/21 396 13,141 Government National Mortgage Association, 6.5%, 3/15/29 14,360 813,343 Tennessee Valley Authority, 4.929%, 1/15/21 868,391 30,000,000 U.S. Treasury Bill, 7/16/17 (c) 29,998,110 50,000,000 U.S. Treasury Bill, 9/28/17 (c) 49,877,950 63,487,776 U.S. Treasury Inflation Indexed Bonds, 0.75%, 2/15/45 59,540,170 72,471,498 U.S. Treasury Inflation Indexed Bonds, 1.0%, 2/15/46 72,406,491 5,200,000 U.S. Treasury Notes, 1.875%, 8/31/17 5,207,483 -------------- $1,596,339,263 ---------------------------------------------------------------------------------------------------- TOTAL U.S. GOVERNMENT AND AGENCY OBLIGATIONS (Cost $1,604,829,119) $1,596,339,263 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 80 Pioneer Bond Fund | Annual Report | 6/30/17 ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- FOREIGN GOVERNMENT BONDS -- 0.2% 4,550,000 Africa Finance Corp., 4.375%, 4/29/20 (144A) $ 4,687,410 5,880,000 Kuwait International Bond, 3.50%, 3/20/27 (144A) 6,007,008 -------------- $ 10,694,418 ---------------------------------------------------------------------------------------------------- TOTAL FOREIGN GOVERNMENT BONDS (Cost $10,347,818) $ 10,694,418 ---------------------------------------------------------------------------------------------------- MUNICIPAL BONDS -- 1.6% (g) Municipal Development -- 0.2% 4,500,000 New Jersey Economic Development Authority, 2/15/18 (c) $ 4,446,675 ---------------------------------------------------------------------------------------------------- Municipal Education -- 0.0%+ 525,000 Amherst College, 3.794%, 11/1/42 $ 523,145 ---------------------------------------------------------------------------------------------------- Municipal General -- 0.2% 4,075,000 JobsOhio Beverage System, 3.985%, 1/1/29 $ 4,349,370 1,035,000 JobsOhio Beverage System, 4.532%, 1/1/35 1,141,077 2,325,000 Virginia Commonwealth Transportation Board, 4.0%, 5/15/31 2,507,373 2,335,000 Virginia Commonwealth Transportation Board, 4.0%, 5/15/32 2,503,027 -------------- $ 15,470,667 ---------------------------------------------------------------------------------------------------- Municipal Higher Education -- 0.8% 1,025,000 Baylor University, 4.313%, 3/1/42 $ 1,086,602 7,425,000 Massachusetts Development Finance Agency, Harvard University-Series A, 5.0%, 7/15/40 9,764,766 4,340,000 New York State Dormitory Authority, 5.0%, 10/1/46 5,826,624 1,900,000 The George Washington University, 1.827%, 9/15/17 1,901,566 16,810,000 University Of California CA Revenues, 3.063%, 7/01/25 16,930,528 3,100,000 University of Virginia, Green Bond Series A, 5.0%, 4/1/45 3,590,916 -------------- $ 39,101,002 ---------------------------------------------------------------------------------------------------- Municipal Medical -- 0.1% 1,765,000 Ohio Higher Educational Facility Commission, 5.0%, 1/1/42 $ 1,966,510 ---------------------------------------------------------------------------------------------------- Municipal School District -- 0.1% 2,800,000 Frisco Independent School District, 4.0%, 8/15/40 $ 2,958,172 1,750,000 Frisco Independent School District, 4.0%, 8/15/45 1,839,162 -------------- $ 6,763,844 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/17 81 Schedule of Investments | 6/30/17 (continued) ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- Municipal Transportation -- 0.1% 3,220,000 Fairfax County Economic Development Authority, 2.875%, 4/1/34 $ 2,937,638 600,000 Port Authority of New York & New Jersey, 4.458%, 10/1/62 653,706 2,830,000 Virginia Commonwealth Transportation Board, 3.0%, 5/15/39 2,635,466 -------------- $ 6,226,810 ---------------------------------------------------------------------------------------------------- Municipal Obligation -- 0.1% 3,150,000 State of Texas, 4.0%, 10/1/44 $ 3,309,768 1,600,000 State of Washington, 5.0%, 7/1/30 1,876,288 -------------- $ 5,186,056 ---------------------------------------------------------------------------------------------------- TOTAL MUNICIPAL BONDS (Cost $71,881,579) $ 72,748,379 ---------------------------------------------------------------------------------------------------- SENIOR FLOATING RATE LOAN INTERESTS -- 3.4%* ENERGY -- 0.3% Oil & Gas Drilling -- 0.2% 7,165,000 7.08 Gavilan Resources LLC, Initial Term Loan (Second Lien), 2/23/24 $ 6,824,662 ---------------------------------------------------------------------------------------------------- Oil & Gas Refining & Marketing -- 0.0%+ 566,414 3.23 Pilot Travel Centers LLC, Initial Tranche B Term Loan, 5/25/23 $ 570,379 ---------------------------------------------------------------------------------------------------- Oil & Gas Storage & Transportation -- 0.1% 1,300,000 3.83 Energy Transfer Equity LP, Loan, 2/2/24 $ 1,295,241 1,866,440 6.55 Gulf Finance LLC, Tranche B Term Loan, 8/17/23 1,749,788 -------------- $ 3,045,029 -------------- Total Energy $ 10,440,070 ---------------------------------------------------------------------------------------------------- MATERIALS -- 0.2% Commodity Chemicals -- 0.0%+ 1,547,177 4.80 Tronox Pigments Holland BV, New Term Loan, 3/19/20 $ 1,559,673 ---------------------------------------------------------------------------------------------------- Specialty Chemicals -- 0.1% 317,579 4.41 Allnex USA, Inc., Term Loan, 9/13/23 $ 318,373 421,533 4.41 Allnex USA, Inc., Term Loan, 9/13/23 422,587 672,551 4.23 Macdermid, Inc., Term Loan, 6/7/23 675,143 67,049 4.23 Huntsman International LLC, 2015 Extended Term B Dollar Loan, 4/19/19 67,370 595,500 5.48 OMNOVA Solutions, Inc., Term B-2 Loan, 8/17/23 602,572 391,974 3.17 WR Grace & Co-Conn, U.S. Term Loan, 1/23/21 393,567 -------------- $ 2,479,612 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 82 Pioneer Bond Fund | Annual Report | 6/30/17 ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- Construction Materials -- 0.1% 103,743 3.95 CeramTec Acquisition Corp., Initial Dollar Term B-2 Loan, 8/30/20 $ 104,521 262,365 3.95 CeramTec GmbH, Dollar Term B-3 Loan, 8/30/20 264,333 862,198 3.95 CeramTec GmbH, Initial Dollar Term B-1 Loan, 8/30/20 868,664 775,000 5.05 Unifrax I LLC, Term Loan (First Lien), 3/30/24 783,719 -------------- $ 2,021,237 ---------------------------------------------------------------------------------------------------- Metal & Glass Containers -- 0.0%+ 510,998 4.33 Bway Holding Co., Term Loan, 3/23/24 $ 511,180 ---------------------------------------------------------------------------------------------------- Paper Packaging -- 0.0%+ 498,750 3.62 Berry Plastics Corp., Term J Loan, 1/13/24 $ 499,720 ---------------------------------------------------------------------------------------------------- Steel -- 0.0%+ 398,000 4.79 Zekelman Industries, Inc., Term Loan, 6/8/21 $ 401,648 ---------------------------------------------------------------------------------------------------- Paper Products -- 0.0%+ 323,346 4.48 Rack Holdings, Inc., Tranche B-1 USD Term Loan, 10/1/21 $ 324,154 -------------- Total Materials $ 7,797,224 ---------------------------------------------------------------------------------------------------- CAPITAL GOODS -- 0.4% Aerospace & Defense -- 0.1% 994,924 5.73 Alion Science & Technology Corp., Term Loan (First Lien), 8/13/21 $ 997,411 2,339,711 3.98 DigitalGlobe, Inc., Term Loan, 12/22/23 2,345,560 1,424,747 6.05 The SI Organization, Inc., Term Loan (First Lien), 11/19/19 1,445,674 -------------- $ 4,788,645 ---------------------------------------------------------------------------------------------------- Building Products -- 0.0%+ 424,309 4.07 Builders Firstsource, Inc., Term Loan 2/29/24 $ 424,132 1,473,448 4.25 NCI Building Systems, Inc., Tranche B Term Loan, 6/24/19 1,483,578 -------------- $ 1,907,710 ---------------------------------------------------------------------------------------------------- Electrical Components & Equipment -- 0.1% 1,493,507 3.73 Dell International LLC, Term Loan, 9/7/23 $ 1,501,375 2,012,396 3.62 Southwire Co., Term Loan, 1/31/21 2,020,782 -------------- $ 3,522,157 ---------------------------------------------------------------------------------------------------- Industrial Conglomerates -- 0.1% 746,127 4.48 Filtration Group, Inc., Term Loan (First Lien), 11/21/20 $ 752,267 1,299,074 4.23 Milacron LLC, Term Loan, 9/25/23 1,303,946 -------------- $ 2,056,213 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/17 83 Schedule of Investments | 6/30/17 (continued) ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- Construction & Farm Machinery & Heavy Trucks -- 0.0%+ 740,602 5.09 Navistar, Inc., Tranche B Term Loan, 8/7/20 $ 749,396 ---------------------------------------------------------------------------------------------------- Industrial Machinery -- 0.1% 3,442,393 5.48 NN, Inc., Tranche B Term Loan, 10/19/22 $ 3,441,856 ---------------------------------------------------------------------------------------------------- Trading Companies & Distributors -- 0.0%+ 594,015 4.92 Nexeo Solutions LLC, Term Loan, 6/9/23 $ 600,048 387,691 4.49 WESCO Distribution, Inc., Tranche B-1 Loan, 12/12/19 389,024 -------------- $ 989,072 -------------- Total Capital Goods $ 17,455,049 ---------------------------------------------------------------------------------------------------- COMMERCIAL SERVICES & SUPPLIES -- 0.1% Environmental & Facilities Services -- 0.1% 398,564 4.80 Infiltrator Water Technologies LLC, Term B-1 Loan, 5/27/22 $ 401,554 895,420 4.05 Waste Industries USA, Inc., Term B Loan, 2/27/20 900,457 -------------- $ 1,302,011 ---------------------------------------------------------------------------------------------------- Security & Alarm Services -- 0.0%+ 599,524 5.23 Garda World Security Corp., Term Loan, 5/3/24 $ 603,271 ---------------------------------------------------------------------------------------------------- Human Resource & Employment Services -- 0.0%+ 678,946 3.29 On Assignment, Inc., Tranche B-2 Term Loan, 6/5/22 $ 685,028 -------------- Total Commercial Services & Supplies $ 2,590,310 ---------------------------------------------------------------------------------------------------- TRANSPORTATION -- 0.0%+ Airlines -- 0.0%+ 786,000 3.73 Delta Air Lines, Inc., Term Loan (First Lien), 8/24/22 $ 793,369 -------------- Total Transportation $ 793,369 ---------------------------------------------------------------------------------------------------- AUTOMOBILES & COMPONENTS -- 0.2% Auto Parts & Equipment -- 0.2% 632,002 3.22 Allison Transmission, Inc., Term B-3 Loan, 8/23/19 $ 636,527 4,182,750 3.47 American Axle & Manufacturing, Inc., Term Loan, 3/9/24 4,166,542 2,024,794 6.05 Electrical Components International, Inc., Loan, 4/17/21 2,037,449 814,623 4.93 Federal-Mogul Corporation, Tranche C Term, 4/15/21 817,933 1,754,223 3.98 TI Group Automotive Systems LLC, Initial US Term Loan, 6/25/22 1,756,416 1,193,436 3.88 Tower Automotive Holdings USA LLC, Term Loan, 3/6/24 1,195,674 -------------- $ 10,610,541 ---------------------------------------------------------------------------------------------------- Tires & Rubber -- 0.0%+ 1,396,667 3.12 The Goodyear Tire & Rubber Co., Term Loan (Second Lien), 3/27/19 $ 1,409,178 -------------- Total Automobiles & Components $ 12,019,719 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 84 Pioneer Bond Fund | Annual Report | 6/30/17 ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- CONSUMER DURABLES & APPAREL -- 0.0%+ Apparel, Accessories & Luxury Goods -- 0.0%+ 374,853 3.73 Hanesbrands, Inc., New Term B Loan, 4/15/22 $ 378,365 ---------------------------------------------------------------------------------------------------- Footwear -- 0.0%+ 893,256 3.23 Regal Cinemas Corp., Term Loan, 4/1/22 $ 896,526 -------------- Total Consumer Durables & Apparel $ 1,274,891 ---------------------------------------------------------------------------------------------------- CONSUMER SERVICES -- 0.2% Casinos & Gaming -- 0.1% 13,333 4.30 Pinnacle Entertainment Inc., Term Loan, 3/30/23 $ 13,429 3,339,169 5.11 Scientific Games International, Inc., Initial Term B-3 Loan, 10/1/21 3,376,137 -------------- $ 3,389,566 ---------------------------------------------------------------------------------------------------- Leisure Facilities -- 0.0%+ 504,023 5.48 L.A. Fitness International LLC, Tranche B Term Loan (First Lien), 4/25/20 $ 511,478 1,292,915 3.23 Six Flags Theme Parks, Inc., Tranche B Term Loan, 6/30/22 1,306,450 -------------- $ 1,817,928 ---------------------------------------------------------------------------------------------------- Education Services -- 0.0%+ 575,248 3.48 Bright Horizons Family Solutions, Inc., Term Loan, 11/3/23 $ 579,322 987,406 4.23 Houghton Mifflin Harcourt Publishers, Inc., Term Loan, 5/11/21 941,738 987,277 4.70 Nord Anglia Education, Initial Term Loan, 3/31/21 990,363 -------------- $ 2,511,423 ---------------------------------------------------------------------------------------------------- Specialized Consumer Services -- 0.1% 650,000 6.16 Constellis Group, Inc., Term Loan, 4/18/24 $ 644,041 766,614 5.29 GENEX Holdings, Inc., Term B Loan (First Lien), 5/22/21 763,260 2,238,722 5.05 Kuehg Corp., Term Loan, 8/13/22 2,253,415 -------------- $ 3,660,716 -------------- Total Consumer Services $ 11,379,633 ---------------------------------------------------------------------------------------------------- MEDIA -- 0.3% Broadcasting -- 0.1% 1,300,000 3.10 Nielsen Finance LLC, Term Loan, 10/4/23 $ 1,302,807 2,206,385 3.98 Univision Communications, Inc., Term Loan, 3/15/24 2,169,843 -------------- $ 3,472,650 ---------------------------------------------------------------------------------------------------- Cable & Satellite -- 0.1% 1,656,000 3.23 Charter Communications Operating LLC, Term F-1 Loan, 1/3/21 $ 1,662,554 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/17 85 Schedule of Investments | 6/30/17 (continued) ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- Cable & Satellite -- (continued) 720,343 4.00 Intelsat Jackson Holdings SA, Tranche B-2 Term Loan, 6/30/19 $ 715,241 650,000 3.91 UPC Financing Partnership, Facility AP, 4/15/25 651,544 -------------- $ 3,029,339 ---------------------------------------------------------------------------------------------------- Movies & Entertainment -- 0.1% 563,091 3.46 AMC Entertainment, Inc., Initial Term Loan, 4/30/20 $ 565,379 2,064,426 3.32 Live Nation Entertainment, Inc., Term Loan, 10/27/23 2,075,398 3,179,059 3.73 Rovi Solutions Corp., Term B Loan, 7/2/21 3,186,609 -------------- $ 5,827,386 ---------------------------------------------------------------------------------------------------- Publishing -- 0.0%+ 1,396,923 3.58 DH Publishing LP, Term Loan, 8/20/23 $ 1,399,812 -------------- Total Media $ 13,729,187 ---------------------------------------------------------------------------------------------------- RETAILING -- 0.1% Specialty Stores -- 0.0%+ 1,143,919 4.22 PetSmart, Inc., Tranche B-2 Loan, 3/10/22 $ 1,065,186 ---------------------------------------------------------------------------------------------------- Automotive Retail -- 0.1% 1,374,757 3.55 Cooper-Standard Automotive, Inc., Additional Term B-1 Loan, 10/28/23 $ 1,377,120 1,998,209 4.84 CWGS Group LLC, Term Loan, 11/3/23 2,011,447 -------------- $ 3,388,567 ---------------------------------------------------------------------------------------------------- Homefurnishing Retail -- 0.0%+ 1,663,308 4.77 Serta Simmons Holdings, Term Loan, 10/21/23 $ 1,662,962 -------------- Total Retailing $ 6,116,715 ---------------------------------------------------------------------------------------------------- FOOD, BEVERAGE & TOBACCO -- 0.1% Agricultural Products -- 0.0%+ 1,818,205 3.73 Darling International, Inc., Term B USD Loan, 12/19/20 $ 1,834,683 ---------------------------------------------------------------------------------------------------- Packaged Foods & Meats -- 0.1% 3,543,885 5.75 JBS USA Lux SA, Term Loan, 10/30/22 $ 3,459,165 487,729 3.23 Pinnacle Foods Finance LLC, Initial Term Loan, 1/30/24 489,863 -------------- $ 3,949,028 -------------- Total Food, Beverage & Tobacco $ 5,783,711 ---------------------------------------------------------------------------------------------------- HOUSEHOLD & PERSONAL PRODUCTS -- 0.1% Personal Products -- 0.1% 3,726,912 4.73 Revlon Consumer Products Corp., Initial Term B Loan, 7/22/23 $ 3,483,888 506,366 4.80 The Nature's Bounty Co., Dollar Term B-1 Loan, 5/5/23 507,569 -------------- $ 3,991,457 -------------- Total Household & Personal Products $ 3,991,457 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 86 Pioneer Bond Fund | Annual Report | 6/30/17 ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- HEALTH CARE EQUIPMENT & SERVICES -- 0.4% Health Care Supplies -- 0.1% 2,555,000 4.55 Kinetic Concepts, Inc., Term Loan B, 2/1/24 $ 2,545,950 733,794 4.15 Sterigenics-Nordion Holdings LLC, Term Loan, 5/15/22 732,418 -------------- $ 3,278,368 ---------------------------------------------------------------------------------------------------- Health Care Services -- 0.1% 911,558 4.44 Alliance HealthCare Services, Inc., Initial Term Loan, 6/3/19 $ 913,457 180,983 6.80 Ardent Legacy Acquisitions, Inc., Term Loan, 7/31/21 182,001 246,068 3.98 DaVita HealthCare Partners, Inc., Tranche B Loan (First Lien), 6/19/21 247,803 489,907 4.30 MPH Acquisition Holdings LLC, Initial Term Loan, 5/25/23 491,591 1,097,250 3.98 Team Heal, Inc., Term Loan, 1/12/24 1,092,724 -------------- $ 2,927,576 ---------------------------------------------------------------------------------------------------- Health Care Facilities -- 0.2% 893,084 4.05 CHS, Incremental 2019 Term G Loan, 12/31/19 $ 892,875 1,646,077 4.15 CHS, Incremental 2021 Term H Loan, 1/27/21 1,645,489 1,717,890 3.23 HCA, Inc., Term Loan, 3/10/23 1,724,451 627,933 3.48 HCA, Inc., Tranche B-8 Term Loan, 2/15/24 631,466 541,631 4.69 Kindred Healthcare, Inc., Tranche B Loan (First Lien), 4/10/21 544,903 1,163,273 4.65 Select Medical Corp., Term Loan, 2/13/24 1,174,172 1,737,710 4.73 Vizient Inc., Term Loan, 2/13/23 1,756,173 -------------- $ 8,369,529 ---------------------------------------------------------------------------------------------------- Health Care Technology -- 0.0%+ 1,296,750 3.98 Change Healthcare Holdings, Inc., Term Loan, 2/3/24 $ 1,298,573 1,134,300 3.23 Quintiles Ims Inc., Term Loan, 3/7/24 1,143,398 -------------- $ 2,441,971 -------------- Total Health Care Equipment & Services $ 17,017,444 ---------------------------------------------------------------------------------------------------- PHARMACEUTICALS, BIOTECHNOLOGY & LIFE SCIENCES -- 0.2% Biotechnology -- 0.0%+ 730,818 3.97 Alkermes, Inc., 2021 Term Loan, 9/25/19 $ 736,300 ---------------------------------------------------------------------------------------------------- Pharmaceuticals -- 0.1% 313,935 5.50 Concordia Healthcare Corp., Initial Dollar Term Loan, 10/20/21 $ 236,040 723,188 3.44 Grifols Worldwide Operations USA, Inc., Tranche B Term Loan, 1/23/25 725,178 789,357 4.05 Mallinckrodt International Finance SA., Term Loan, 9/24/24 788,173 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/17 87 Schedule of Investments | 6/30/17 (continued) ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- Pharmaceuticals -- (continued) 2,576,944 3.30 RPI Finance Trust, Term Loan, 3/17/23 $ 2,589,628 1,244,396 5.83 Valeant Pharmaceuticals, Series F-1, 3/11/22 1,262,631 -------------- $ 5,601,650 ---------------------------------------------------------------------------------------------------- Life Sciences Tools & Services -- 0.1% 1,237,406 5.91 Albany Molecular Research, Inc., Term Loan, 7/14/21 $ 1,244,882 2,390,731 3.98 Catalent Pharma Solutions, Dollar Term Loan, 5/20/21 2,415,136 -------------- $ 3,660,018 -------------- Total Pharmaceuticals, Biotechnology & Life Sciences $ 9,997,968 ---------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 0.1% Other Diversified Financial Services -- 0.0%+ 1,176,591 3.29 Fly Funding II Sarl, Loan, 8/9/19 $ 1,180,024 ---------------------------------------------------------------------------------------------------- Specialized Finance -- 0.1% 1,700,978 3.50 BC Unlimited Liability Co., Term Loan, 2/17/24 $ 1,700,625 1,462,245 3.73 Trans Union LLC, 2016 Incremental Term B-2 Commitment, 4/9/21 1,473,995 -------------- $ 3,174,620 ---------------------------------------------------------------------------------------------------- Diversified Capital Markets -- 0.0%+ 1,500,000 3.96 Avolon Tlb Borrower, Term Loan, 1/20/22 $ 1,515,009 -------------- Total Diversified Financials $ 5,869,653 ---------------------------------------------------------------------------------------------------- INSURANCE -- 0.0%+ Insurance Brokers -- 0.0%+ 1,140,880 4.80 NFP Corp., Term B Loan, 12/9/23 $ 1,147,583 ---------------------------------------------------------------------------------------------------- Property & Casualty Insurance -- 0.0%+ 850,000 4.18 USI, Inc., Tl Lien, Term Loan, 4/5/24 $ 845,856 -------------- Total Insurance $ 1,993,439 ---------------------------------------------------------------------------------------------------- REAL ESTATE -- 0.1% Retail REIT -- 0.0%+ 987,406 4.42 DTZ US Borrower LLC, 2015-1 Additional Term Loan (First Lien), 11/4/21 $ 988,763 ---------------------------------------------------------------------------------------------------- Specialized REIT -- 0.1% 1,625,302 6.25 Uniti Group, Inc., Shortfall Term Loan, 10/24/22 $ 1,626,989 -------------- Total Real Estate $ 2,615,752 ---------------------------------------------------------------------------------------------------- SOFTWARE & SERVICES -- 0.2% Internet Software & Services -- 0.1% 384,000 5.04 Blucora, Inc., Term Loan, 4/21/24 $ 386,400 1,870,313 4.17 Rackspace Hosting, Inc., Term Loan, 11/3/23 1,873,586 -------------- $ 2,259,986 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 88 Pioneer Bond Fund | Annual Report | 6/30/17 ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- IT Consulting & Other Services -- 0.0%+ 1,223,685 3.73 Go Daddy Operating Co., LLC, Initial Term Loan, 2/6/24 $ 1,227,815 820,865 5.55 Rocket Software, Inc., Term Loan (First Lien), 10/11/23 829,279 -------------- $ 2,057,094 ---------------------------------------------------------------------------------------------------- Data Processing & Outsourced Services -- 0.1% 917,563 3.72 First Data Corporation, Term Loan, 4/21/24 $ 918,366 1,259,764 3.47 First Data Corporation, Term Loan, 7/10/22 1,259,413 -------------- $ 2,177,779 ---------------------------------------------------------------------------------------------------- Application Software -- 0.0%+ 746,241 6.42 DTI HoldCo, Inc., Term Loan (First Lien), 9/23/23 $ 726,185 350,000 6.55 STG-Fairway Acquisitions, Inc., Term Loan (First Lien), 6/30/22 322,438 -------------- $ 1,048,623 ---------------------------------------------------------------------------------------------------- Systems Software -- 0.0%+ 465,684 4.55 Avast Software BV, Term Loan, 9/30/23 $ 470,535 110,000 0.00 MA Financeco LLC, Term Loan, 4/18/24 110,124 740,000 2.75 Seattle Spinco, Inc., Term Loan, 4/18/24 740,832 -------------- $ 1,321,491 -------------- Total Software & Services $ 8,864,973 ---------------------------------------------------------------------------------------------------- TECHNOLOGY HARDWARE & EQUIPMENT -- 0.0%+ Communications Equipment -- 0.0%+ 903,973 3.71 Ciena Corp., Term Loan, 2/25/22 $ 908,493 -------------- Total Technology Hardware & Equipment $ 908,493 ---------------------------------------------------------------------------------------------------- SEMICONDUCTORS & SEMICONDUCTOR EQUIPMENT -- 0.1% Semiconductor Equipment -- 0.0%+ 1,095,530 3.55 Sensata Technologies BV, Sixth Amendment Term Loan, 10/14/21 $ 1,104,209 ---------------------------------------------------------------------------------------------------- Semiconductors -- 0.1% 368,594 3.33 Microsemi Corp., Closing Date Term B Loan, 12/17/22 $ 370,015 1,269,317 3.48 Semiconductor Corp., Term Loan, 3/31/23 1,272,888 -------------- $ 1,642,903 -------------- Total Semiconductors & Semiconductor Equipment $ 2,747,112 ---------------------------------------------------------------------------------------------------- TELECOMMUNICATION SERVICES -- 0.2% Integrated Telecommunication Services -- 0.1% 2,000,000 1.38 Centurylink, Inc., Term Loan, 1/31/25 $ 1,980,714 1,143,313 4.23 Cincinnati Bell, Inc., Tranche B Term Loan, 9/10/20 1,152,246 1,186,736 4.04 GCI Holdings, Inc., New Term B Loan (2016), 2/2/22 1,194,895 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/17 89 Schedule of Investments | 6/30/17 (continued) ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- Integrated Telecommunication Services -- (continued) 1,200,000 3.47 Level 3 Financing, Inc., Term Loan, 2/17/24 $ 1,204,250 -------------- $ 5,532,105 ---------------------------------------------------------------------------------------------------- Wireless Telecommunication Services -- 0.1% 1,849,053 3.47 Altice Us Finance I Corp., Term Loan, 7/28/25 $ 1,850,439 1,296,750 3.75 Sprint Communications, Inc., Term Loan, 2/2/24 1,298,139 -------------- $ 3,148,578 -------------- Total Telecommunication Services $ 8,680,683 ---------------------------------------------------------------------------------------------------- UTILITIES -- 0.2% Electric Utilities -- 0.1% 1,665,676 3.48 Calpine Construction Finance Co., LP, Term B-1 Loan, 5/3/20 $ 1,665,416 1,687,438 5.11 TPF II Power, LLC, Term Loan, 10/2/21 1,682,376 415,194 3.98 Vistra Operations Co., LLC, Initial Term C Loan, 8/4/23 411,717 1,811,364 3.98 Vistra Operations Co., LLC, Initial Term Loan, 8/4/23 1,796,194 -------------- $ 5,555,703 ---------------------------------------------------------------------------------------------------- Independent Power Producers & Energy Traders -- 0.1% 997,500 4.48 Dynegy, Inc., Tranche C-1 Term Loan, 6/27/23 $ 996,495 1,292,588 3.55 NRG Energy, Inc., Term Loan, 6/30/23 1,291,665 -------------- $ 2,288,160 -------------- Total Utilities $ 7,843,863 ---------------------------------------------------------------------------------------------------- TOTAL SENIOR FLOATING RATE LOAN INTERESTS (Cost $158,846,545) $ 159,910,715 ---------------------------------------------------------------------------------------------------- TEMPORARY CASH INVESTMENTS -- 2.2% Repurchase Agreements -- 2.0% 28,245,000 $28,245,000 ScotiaBank, 1.12%, dated 6/30/17 plus accrued interest on 7/3/17 collateralized by the following: $17,933,274 Freddie Mac Giant, 3.5, 6/1/42 $27,848,125 Federal National Mortgage Association (ARM), 2.5 -- 4.5%, 4/1/26-5/1/47 $ 28,245,000 15,085,000 $15,085,000 RBC Capital Markets LLC, 1.06%, dated 6/30/17 plus accrued interest on 7/3/17 collateralized by the following: $1,128,170 Freddie Mac Giant, 4.5%, 4/1/44-7/1/44 $2,557,950 Federal National Mortgage Association (ARM), 3.31, 2/1/27 $3,391,668 Federal National Mortgage Association, 2.5-4.0%, 3/1/27-5/1/47 $8,308,913 Government National Mortgage Association, 3.5-4.0%, 3/20/47-4/20/47 15,085,000 The accompanying notes are an integral part of these financial statements. 90 Pioneer Bond Fund | Annual Report | 6/30/17 ---------------------------------------------------------------------------------------------------- Principal Floating Amount ($) Rate (b) Value ---------------------------------------------------------------------------------------------------- Repurchase Agreements -- (continued) 24,835,000 $24,835,000 TD Securities USA LLC, 1.10%, dated 6/30/17 plus accrued interest on 7/3/17 collateralized by the following: $8,900,966 Freddie Mac Giant, 3.0% -- 5.8%, 10/1/18-2/1/47 $6,460,818 Federal National Mortgage Association, 3.0-8.0%, 8/1/21-11/1/46 9,969,922 U.S. Treasury Notes, 1.375%, 9/30/20 $ 24,835,000 24,835,000 $24,835,000 TD Securities USA LLC, 1.12%, dated 6/30/17 plus accrued interest on 7/3/17 collateralized by the following: $100 U.S. Treasury Bill, 0.0%, 7/20/17 $19,027,745 Federal National Mortgage Association, 3.5-4.0%, 1/1/44-2/1/46 $6,303,925 U.S. Treasury Notes, 2.5%, 8/15/23 24,835,000 -------------- $ 93,000,000 ---------------------------------------------------------------------------------------------------- Commercial Paper -- 0.2% 9,550,000 Energy Transfer Discount Note, 7/6/17 (c) $ 9,547,295 ---------------------------------------------------------------------------------------------------- TOTAL TEMPORARY CASH INVESTMENTS (Cost $102,547,480) $ 102,547,295 ---------------------------------------------------------------------------------------------------- TOTAL INVESTMENT IN SECURITIES -- 99.6% (Cost $4,657,369,720) (a) $4,696,959,831 ---------------------------------------------------------------------------------------------------- OTHER ASSETS & LIABILITIES -- 0.4% $ 19,621,678 ---------------------------------------------------------------------------------------------------- NET ASSETS -- 100.0% $4,716,581,509 ==================================================================================================== + Amount rounds to less than 0.1%. (Step) Bond issued with an initial coupon rate which converts to a higher rate at a later date. REMICS Real Estate Mortgage Investment Conduits. (Perpetual) Security with no stated maturity date. (ARM) Adjustable Rate Mortgage. (Cat Bond) Catastrophe or event linked bond. At June 30, 2017 the value of these securities amounted to $67,530,260 or 1.4% of net assets. See Notes to Financial Statements -- 1F. FREMF Freddie Mac Multifamily Fixed-Rate Mortgage Loans. REIT Real Estate Investment Trust. (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 June 30, 2017, the value of these securities amounted to $1,300,478,838 or 27.6% of net assets. The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/17 91 Schedule of Investments | 6/30/17 (continued) * 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 U.S. 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 June 30, 2017, the net unrealized appreciation on investments based on cost for federal income tax purposes of $4,666,726,201 was as follows: Aggregate gross unrealized appreciation for all investments in which there is an excess of value over tax cost $ 65,987,956 Aggregate gross unrealized depreciation for all investments in which there is an excess of tax cost over value (35,754,326) ------------- Net unrealized appreciation $ 30,233,630 ============= (b) Debt obligation with a variable interest rate. Rate shown is rate at period end. (c) Security issued with a zero coupon. Income is earned through accretion of discount. (d) Security is valued using fair value methods (other than prices supplied by independent pricing services or broker-dealers). See Notes to Financial Statements -- Note 1A. (e) Structured reinsurance investment. At June 30, 2017, the value of these securities amounted to $68,798,858 or 1.5% of net assets. See Notes to Financial Statements -- Note 1F. (f) Rate to be determined. (g) Consists of Revenue Bonds unless otherwise indicated. (h) Security represents the interest only portion payments on a pool of underlying mortgages or mortgage-backed securities. Purchases and sales of securities (excluding temporary cash investments) for the year ended June 30, 2017 were as follows: ----------------------------------------------------------------------------- Purchases Sales ----------------------------------------------------------------------------- Long-Term U.S. Government $ 803,289,132 $ 471,665,749 Other Long-Term Securities 1,748,693,353 1,336,500,453 The Fund is permitted to engage in purchase and sale transactions ("cross trades") with certain Funds and accounts for which Amundi Pioneer Asset Management, Inc. (Amundi Pioneer), formerly Pioneer Investment Management, Inc. (PIM), serves as the Fund's investment adviser, as set forth in Rule 17a-7 under the Investment Company Act of 1940, pursuant to procedures adopted by the Board of Trustees. Under these procedures, cross trades are effected at current market prices. During the year ended June 30, 2017, the Fund engaged in purchases and sales pursuant to these procedures amounting to $31,829,322 and $9,534,651, respectively, which resulted in a net realized gain of $353,563. The accompanying notes are an integral part of these financial statements. 92 Pioneer Bond Fund | Annual Report | 6/30/17 CREDIT DEFAULT SWAP AGREEMENTS -- SELL PROTECTION ------------------------------------------------------------------------------------------------------- Notional Obligation Credit Expiration Premiums Unrealized Principal ($)(1) Counterparty Entity/Index Coupon Rating(2) Date Received Appreciation ------------------------------------------------------------------------------------------------------- 6,808,791 JP Morgan Simon Property 1.00% A 6/20/22 $(21,209) $74,007 Group LP ------------------------------------------------------------------------------------------------------- $(21,209) $74,007 ======================================================================================================= CENTRALLY CLEARED CREDIT DEFAULT SWAP AGREEMENTS -- SELL PROTECTION ------------------------------------------------------------------------------------------------------- Notional Obligation Credit Expiration Premiums Unrealized Principal ($)(1) Counterparty Entity/Index Coupon Rating(2) Date Received Appreciation ------------------------------------------------------------------------------------------------------- 23,690,700 Chicago Markit CDX 1.00% B+ 6/20/20 $(1,831,702) $15,152 Mercantile North America Exchange Investment Grade Index ------------------------------------------------------------------------------------------------------- $(1,831,702) $15,152 ======================================================================================================= CDX Credit Default Index (1) The notional amount is the maximum amount that a seller of credit protection would be obligated to pay upon occurrence of a credit event. (2) Based on Standard & Poor's rating of the issuer or the weighted average of all the underlying securities in the index. Various inputs are used in determining the value of the Funds's investments. These inputs are summarized in the three broad levels listed below. Level 1 - quoted prices in active markets for identical securities. Level 2 - other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.). See Notes to Financial Statements -- Note 1A. Level 3 - significant unobservable inputs (including the Fund's own assumptions in determining fair value of investments). See Notes to Financial Statements -- Note 1A. The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/17 93 Schedule of Investments | 6/30/17 (continued) The following is a summary of the inputs used as of June 30, 2017, in valuing the Fund's investments: ------------------------------------------------------------------------------------------------------ Level 1 Level 2 Level 3 Total ------------------------------------------------------------------------------------------------------ Convertible Preferred Stocks $ 46,845,749 $ -- $ -- $ 46,845,749 Asset Backed Securities -- 235,889,774 -- 235,889,774 Collateralized Mortgage Obligations -- 873,081,588 -- 873,081,588 Corporate Bonds Diversified Financials Other Diversified Financial Services -- -- 1,547,747 1,547,747 Insurance Reinsurance -- 67,530,260 68,798,858 136,329,118 All Other Corporate Bonds -- 1,461,025,785 -- 1,461,025,785 U.S. Government and Agency Obligations -- 1,596,339,263 -- 1,596,339,263 Foreign Government Bonds -- 10,694,418 -- 10,694,418 Municipal Bonds -- 72,748,379 -- 72,748,379 Senior Floating Rate Loan Interests -- 159,910,715 -- 159,910,715 Repurchase Agreements -- 93,000,000 -- 93,000,000 Commercial Paper -- 9,547,295 -- 9,547,295 ------------------------------------------------------------------------------------------------------ Total $ 46,845,749 $ 4,579,767,477 $ 70,346,605 $4,696,959,831 ====================================================================================================== Other Financial Instruments Unrealized appreciation on swap contracts $ -- $ 74,007 $ -- $ 74,007 Unrealized appreciation on centrally cleared swap contracts -- 15,152 -- 15,152 Unrealized appreciation on futures contracts 3,146,419 -- -- 3,146,419 Unrealized depreciation on futures contracts (296,108) -- -- (296,108) ------------------------------------------------------------------------------------------------------ Total Other Financial Instruments $ 2,850,311 $ 89,159 $ -- $ 2,939,470 ====================================================================================================== The accompanying notes are an integral part of these financial statements. 94 Pioneer Bond Fund | Annual Report | 6/30/17 The following is a reconciliation of assets valued using significant unobservable inputs (Level 3): -------------------------------------------------------------------------------- Corporate Bonds -------------------------------------------------------------------------------- Balance as of 6/30/16 $ 61,501,798 Realized gain (loss)(1) 7,328 Change in unrealized appreciation (depreciation)(2) 3,090,207 Purchases 69,131,839 Sales (63,384,567) Changes between Level 3* -- -------------------------------------------------------------------------------- Balance as of 6/30/17 $ 70,346,605 ================================================================================ (1) Realized gain (loss) on these securities is included in the net realized gain (loss) from investments in the Statement of Operations. (2) Unrealized appreciation (depreciation) on these securities is included in the change in unrealized appreciation (depreciation) on investments in the Statement of Operations. * Transfers are calculated on the beginning of period values. During the year ended June 30, 2017, there were no transfers between Levels 1, 2 or 3. Net change in unrealized appreciation (depreciation) of investments still held as of 6/30/17 $3,877,124 ---------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/17 95 Statement of Assets and Liabilities | 6/30/17 ASSETS: Investment in securities (cost $4,657,369,720 $4,696,959,831 Cash 15,522,139 Restricted cash* 5,199,920 Receivables -- Investment securities sold 12,939,532 Fund shares sold 45,967,012 Interest 24,015,513 Dividends 331,959 Due from Amundi Pioneer Asset Management, Inc. formerly Pioneer Investment Management, Inc. 58,185 Variation margin on centrally cleared swap contracts 45,781 Variation margin on futures contracts 930,750 Unrealized appreciation on credit default swap contracts 74,007 Other assets 47,742 -------------------------------------------------------------------------------------- Total Assets $4,802,092,371 ====================================================================================== LIABILITIES: Payables -- Investment securities purchased $ 67,260,966 Fund shares repurchased 13,811,384 Dividends 2,189,906 Trustee fees 5,782 Credit default swaps, premiums received 21,209 Due to affiliates 673,601 Accrued expenses 1,548,014 -------------------------------------------------------------------------------------- Total Liabilities $ 85,510,862 ====================================================================================== NET ASSETS: Paid-in capital $4,688,788,619 Undistributed net investment income 1,987,223 Accumulated net realized loss on investments, swap contracts and futures contracts (16,723,914) Net unrealized appreciation on investments 39,590,111 Net unrealized appreciation on swap contracts 89,159 Net unrealized appreciation on futures contracts 2,850,311 -------------------------------------------------------------------------------------- Net Assets $4,716,581,509 ====================================================================================== NET ASSET VALUE PER SHARE: (No par value, unlimited number of shares authorized) Class A (based on $1,156,939,727/119,124,204 shares) $ 9.71 Class C (based on $96,546,997/10,053,229 shares) $ 9.60 Class K (based on $726,063,070/74,805,997 shares) $ 9.71 Class R (based on $178,769,680/18,241,069 shares) $ 9.80 Class Y (based on $2,558,262,035/265,894,293 shares) $ 9.62 MAXIMUM OFFERING PRICE: Class A ($9.71 / 95.5% ) $ 10.17 ====================================================================================== * Represents restricted cash deposited at the counterparty for derivative contracts. The accompanying notes are an integral part of these financial statements. 96 Pioneer Bond Fund | Annual Report | 6/30/17 Statement of Operations For the Year Ended 6/30/17 INVESTMENT INCOME: Interest $ 145,043,025 Dividends 1,506,049 --------------------------------------------------------------------------------------------------- Total investment income $ 146,549,074 =================================================================================================== EXPENSES: Management fees $ 16,975,464 Transfer agent fees Class A 3,042,790 Class C 131,914 Class K 2,611 Class R 455,263 Class Y 2,744,596 Distribution fees Class A 2,953,088 Class C 1,200,712 Class R 842,305 Shareholder communications expense 189,554 Administrative expense 1,334,755 Custodian fees 273,746 Registration fees 341,975 Professional fees 211,231 Printing expense 87,291 Fees and expenses of non-affiliated Trustees 209,221 Miscellaneous 496,291 --------------------------------------------------------------------------------------------------- Total expenses $ 31,492,807 Less fees waived and expenses reimbursed by Amundi Pioneer Asset Management, Inc., (Amundi Pioneer) formerly Pioneer Investment Management, Inc. (2,089,629) --------------------------------------------------------------------------------------------------- Net expenses $ 29,403,178 --------------------------------------------------------------------------------------------------- Net investment income $ 117,145,896 --------------------------------------------------------------------------------------------------- REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS, SWAP CONTRACTS AND FUTURES CONTRACTS: Net realized gain (loss) on: Investments $ 22,457,936 Swap contracts (376,713) Futures contracts 7,898,018 $ 29,979,241 --------------------------------------------------------------------------------------------------- Change in net unrealized appreciation (depreciation) on: Investments $ (55,634,479) Swap contracts 89,159 Futures contracts 20,153,109 $ (35,392,211) --------------------------------------------------------------------------------------------------- Net realized and unrealized gain (loss) on investments, swap contracts futures contracts $ (5,412,970) --------------------------------------------------------------------------------------------------- Net increase in net assets resulting from operations $(111,732,926) =================================================================================================== The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/17 97 Statements of Changes in Net Assets ---------------------------------------------------------------------------------------------- Year Ended Year Ended 6/30/17 6/30/16** ---------------------------------------------------------------------------------------------- FROM OPERATIONS: Net investment income $ 117,145,896 $ 93,820,785 Net realized gain (loss) on investments, swap contracts and futures contracts 29,979,241 (6,243,404) Change in net unrealized appreciation (depreciation) on investments, swap contracts and futures contracts (35,392,211) 59,491,707 ---------------------------------------------------------------------------------------------- Net increase in net assets resulting from operations $ 111,732,926 $ 147,069,088 ---------------------------------------------------------------------------------------------- DISTRIBUTIONS TO SHAREOWNERS: Net investment income: Class A ($0.29 and $0.27 per share, respectively) $ (35,066,940) $ (30,130,801) Class C ($0.21 and $0.20 per share, respectively) (2,681,780) (2,503,533) Class K ($0.33 and $0.31 per share, respectively) (14,828,850) (8,577,930) Class R ($0.27 and $0.25 per share, respectively) (4,575,300) (3,514,545) Class Y ($0.31 and $0.29 per share, respectively) (75,508,120) (56,701,826) Class Z* ($0.00 and $0.03 per share, respectively) -- (184,669) Net realized gains Class A ($0.00 and $0.02 per share, respectively) -- (2,297,989) Class C ($0.00 and $0.02 per share, respectively) -- (256,680) Class K ($0.00 and $0.02 per share, respectively) -- (632,921) Class R ($0.00 and $0.02 per share, respectively) -- (289,802) Class Y ($0.00 and $0.02 per share, respectively) -- (3,842,000) ---------------------------------------------------------------------------------------------- Total distributions to shareowners $ (132,660,990) $ (108,932,696) ---------------------------------------------------------------------------------------------- FROM FUND SHARE TRANSACTIONS Net proceeds from sale of shares $ 2,063,285,335 $ 1,673,600,863 Shares issued in reorganization -- 103,289,215 Reinvestment of distributions 102,010,632 82,738,583 Cost of shares repurchased (1,372,913,664) (1,113,066,216) ---------------------------------------------------------------------------------------------- Net increase in net assets resulting from Fund share transactions $ 792,382,303 $ 746,562,445 ---------------------------------------------------------------------------------------------- Net increase in net assets $ 771,454,239 $ 784,698,837 NET ASSETS: Beginning of year $ 3,945,127,270 $ 3,160,428,433 ---------------------------------------------------------------------------------------------- End of year $ 4,716,581,509 $ 3,945,127,270 ---------------------------------------------------------------------------------------------- Undistributed net investment income $ 1,987,223 $ 3,684,926 ============================================================================================== * Class Z shares converted to Class Y shares on August 7, 2015. ** Beginning with the fiscal year ended June 30, 2017, the Fund was audited by Ernst & Young LLP. The previous year was audited by another independent registered public accounting firm. The accompanying notes are an integral part of these financial statements. 98 Pioneer Bond Fund | Annual Report | 6/30/17 ------------------------------------------------------------------------------------------------ Year Ended Year Ended Year Ended Year Ended 6/30/17 6/30/17 6/30/16** 6/30/16** Shares Amount Shares Amount ------------------------------------------------------------------------------------------------ Class A Shares sold 36,669,895 $ 356,565,380 39,520,516 $ 381,082,323 Shares issued in reorganization -- -- 8,687,202 83,223,137 Reinvestment of distributions 2,534,877 24,634,219 2,429,101 23,363,971 Less shares repurchased (40,716,134) (395,166,041) (37,895,940) (364,153,575) ------------------------------------------------------------------------------------------------ Net increase (decrease) (1,511,362) $ (13,966,442) 12,740,879 $ 123,515,856 ================================================================================================ Class C Shares sold 1,704,424 $ 16,396,255 3,590,552 $ 34,068,700 Shares issued in reorganization -- -- 1,566,042 14,846,083 Reinvestment of distributions 184,381 1,771,759 171,403 1,630,270 Less shares repurchased (5,744,422) (55,006,633) (3,349,111) (31,797,823) ------------------------------------------------------------------------------------------------ Net increase (decrease) (3,855,617) $ (36,838,619) 1,978,886 $ 18,747,230 ================================================================================================ Class K Shares sold 50,598,291 $ 490,469,822 22,645,768 $ 217,799,806 Reinvestment of distributions 867,934 8,426,426 418,685 4,026,426 Less shares repurchased (11,501,721) (111,726,287) (6,730,820) (64,517,198) ------------------------------------------------------------------------------------------------ Net increase 39,964,504 $ 387,169,961 16,333,633 $ 157,309,034 ================================================================================================ Class R Shares sold 6,419,830 $ 62,895,959 7,857,134 $ 76,161,586 Reinvestment of distributions 371,546 3,642,529 332,632 3,227,431 Less shares repurchased (4,393,901) (43,080,190) (4,303,242) (41,715,627) ------------------------------------------------------------------------------------------------ Net increase 2,397,475 $ 23,458,298 3,886,524 $ 37,673,390 ================================================================================================ Class Y Shares sold 118,309,079 $ 1,136,957,919 101,127,077 $ 963,277,766 Shares issued in reorganization -- -- 550,053 5,219,995 Reinvestment of distributions 6,600,224 63,535,699 5,283,365 50,341,027 Less shares repurchased (79,896,185) (767,934,513) (57,493,210) (547,987,984) ------------------------------------------------------------------------------------------------ Net increase 45,013,118 $ 432,559,105 49,467,285 $ 470,850,804 ================================================================================================ Class Z* Shares sold -- $ -- 125,036 $ 1,210,682 Reinvestment of distributions -- -- 15,392 149,458 Less shares repurchased -- -- (6,477,629) (62,894,009) ------------------------------------------------------------------------------------------------ Net decrease -- $ -- (6,337,201) $ (61,533,869) ================================================================================================ * Class Z shares converted to Class Y shares on August 7, 2015. ** Beginning with the fiscal year ended June 30, 2017, the Fund was audited by Ernst & Young LLP. The previous year was audited by another independent registered public accounting firm. The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/17 99 Financial Highlights --------------------------------------------------------------------------------------------------------------------------------- Year Year Year Year Year Ended Ended Ended Ended Ended 6/30/17 6/30/16** 6/30/15** 6/30/14** 6/30/13 --------------------------------------------------------------------------------------------------------------------------------- Class A Net asset value, beginning of period $ 9.76 $ 9.68 $ 9.88 $ 9.67 $ 9.73 --------------------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) $ 0.25(a) $ 0.25(a) $ 0.27 $ 0.35 $ 0.38 Net realized and unrealized gain (loss) on investments (0.01) 0.12 (0.14) 0.24 (0.07) --------------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 0.24 $ 0.37 $ 0.13 $ 0.59 $ 0.31 --------------------------------------------------------------------------------------------------------------------------------- Distribution to shareowners: Net investment income $ (0.29) $ (0.27) $ (0.29) $ (0.38) $ (0.37) Net realized gain -- (0.02) (0.04) -- -- --------------------------------------------------------------------------------------------------------------------------------- Total distributions $ (0.29) $ (0.29) $ (0.33) $ (0.38) $ (0.37) --------------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ (0.05) $ 0.08 $ (0.20) $ 0.21 $ (0.06) --------------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 9.71 $ 9.76 $ 9.68 $ 9.88 $ 9.67 ================================================================================================================================= Total return* 2.48% 3.93% 1.32% 6.19% 3.21% Ratio of net expenses to average net assets 0.85% 0.85% 0.85% 0.85% 0.85% Ratio of net investment income (loss) to average net assets 2.60% 2.58% 2.68% 3.52% 3.77% Portfolio turnover rate 44% 43% 81% 41% 28% Net assets, end of period (in thousands) $1,156,940 $1,177,941 $1,044,659 $706,962 $565,569 Ratios with no waiver of fees and assumption of expenses by Amundi Pioneer formerly PIM and no reduction for fees paid indirectly: Total expenses to average net assets 0.99% 0.98% 0.93% 1.00% 1.01% Net investment income (loss) to average net assets 2.46% 2.45% 2.60% 3.37% 3.61% ================================================================================================================================= * 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. ** Beginning with the fiscal year ended June 30, 2017, the Fund was audited by Ernst & Young LLP. The previous year was audited by another independent registered public accounting firm. (a) The per share data presented above is based on the average shares outstanding for the period presented. The accompanying notes are an integral part of these financial statements. 100 Pioneer Bond Fund | Annual Report | 6/30/17 --------------------------------------------------------------------------------------------------------------------------------- Year Year Year Year Year Ended Ended Ended Ended Ended 6/30/17 6/30/16** 6/30/15** 6/30/14** 6/30/13 --------------------------------------------------------------------------------------------------------------------------------- Class C Net asset value, beginning of period $ 9.66 $ 9.57 $ 9.77 $ 9.57 $ 9.63 --------------------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) $ 0.18(a) $ 0.17(a) $ 0.19 $ 0.26 $ 0.29 Net realized and unrealized gain (loss) on investments (0.03) 0.14 (0.14) 0.23 (0.06) --------------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 0.15 $ 0.31 $ 0.05 $ 0.49 $ 0.23 --------------------------------------------------------------------------------------------------------------------------------- Distribution to shareowners: Net investment income $ (0.21) $ (0.20) $ (0.21) $ (0.29) $ (0.29) Net realized gain -- (0.02) (0.04) -- -- --------------------------------------------------------------------------------------------------------------------------------- Total distributions $ (0.21) $ (0.22) $ (0.25) $ (0.29) $ (0.29) --------------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ (0.06) $ 0.09 $ (0.20) $ 0.20 $ (0.06) --------------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 9.60 $ 9.66 $ 9.57 $ 9.77 $ 9.57 ================================================================================================================================= Total return* 1.62% 3.28% 0.49% 5.20% 2.33% Ratio of net expenses to average net assets 1.59% 1.60% 1.63% 1.73% 1.72% Ratio of net investment income (loss) to average net assets 1.84% 1.84% 1.89% 2.69% 2.93% Portfolio turnover rate 44% 43% 81% 41% 28% Net assets, end of period (in thousands) $96,547 $134,299 $114,222 $73,224 $87,763 ================================================================================================================================= * 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. ** Beginning with the fiscal year ended June 30, 2017, the Fund was audited by Ernst & Young LLP. The previous year was audited by another independent registered public accounting firm. (a) The per share data presented above is based on the average shares outstanding for the period presented. The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/17 101 Financial Highlights (continued) ------------------------------------------------------------------------------------------------------------------------------------ Year Year Year Year 12/20/12 Ended Ended Ended Ended to 6/30/17 6/30/16*** 6/30/15*** 6/30/14*** 6/30/13 ------------------------------------------------------------------------------------------------------------------------------------ Class K Net asset value, beginning of period $ 9.76 $ 9.68 $ 9.87 $ 9.67 $ 9.94 ------------------------------------------------------------------------------------------------------------------------------------ Increase (decrease) from investment operations: Net investment income (loss) $ 0.29(b) $ 0.29(b) $ 0.30 $ 0.40 $ 0.20 Net realized and unrealized gain (loss) on investments (0.01) 0.12 (0.13) 0.20 (0.26) ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) from investment operations $ 0.28 $ 0.41 $ 0.17 $ 0.60 $ (0.06) ------------------------------------------------------------------------------------------------------------------------------------ Distribution to shareowners: Net investment income $ (0.33) $ (0.31) $ (0.32) $ (0.40) $ (0.21) Net realized gain -- (0.02) (0.04) -- -- ------------------------------------------------------------------------------------------------------------------------------------ Total distributions $ (0.33) $ (0.33) $ (0.36) $ (0.40) $ (0.21) ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net asset value $ (0.05) $ 0.08 $ (0.19) $ 0.20 $ (0.27) ------------------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $ 9.71 $ 9.76 $ 9.68 $ 9.87 $ 9.67 ==================================================================================================================================== Total return* 2.87% 4.32% 1.80% 6.37% (0.61)%(a) Ratio of net expenses to average net assets 0.47% 0.47% 0.47% 0.56% 0.57%** Ratio of net investment income (loss) to average net assets 3.01% 2.98% 3.03% 3.59% 3.86%** Portfolio turnover rate 44% 43% 81% 41% 28% Net assets, end of period (in thousands) $726,063 $340,096 $179,135 $ 4,398 $ 10 ==================================================================================================================================== * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period. ** Annualized. *** Beginning with the fiscal year ended June 30, 2017, the Fund was audited by Ernst & Young LLP. The previous year was audited by another independent registered public accounting firm. (a) Not Annualized. (b) The per share data presented above is based on the average shares outstanding for the period presented. The accompanying notes are an integral part of these financial statements. 102 Pioneer Bond Fund | Annual Report | 6/30/17 --------------------------------------------------------------------------------------------------------------------------------- Year Year Year Year Year Ended Ended Ended Ended Ended 6/30/17 6/30/16** 6/30/15** 6/30/14** 6/30/13 --------------------------------------------------------------------------------------------------------------------------------- Class R Net asset value, beginning of period $ 9.85 $ 9.77 $ 9.97 $ 9.76 $ 9.82 --------------------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) $ 0.23(a) $ 0.23(a) $ 0.25 $ 0.32 $ 0.34 Net realized and unrealized gain (loss) on investments (0.01) 0.12 (0.15) 0.23 (0.06) --------------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 0.22 $ 0.35 $ 0.10 $ 0.55 $ 0.28 --------------------------------------------------------------------------------------------------------------------------------- Distribution to shareowners: Net investment income $ (0.27) $ (0.25) $ (0.26) $ (0.34) $ (0.34) Net realized gain -- (0.02) (0.04) -- -- --------------------------------------------------------------------------------------------------------------------------------- Total distributions $ (0.27) $ (0.27) $ (0.30) $ (0.34) $ (0.34) --------------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ (0.05) $ 0.08 $ (0.20) $ 0.21 $ (0.06) --------------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 9.80 $ 9.85 $ 9.77 $ 9.97 $ 9.76 ================================================================================================================================= Total return* 2.23% 3.66% 1.06% 5.75% 2.80% Ratio of net expenses to average net assets 1.10% 1.10% 1.10% 1.25% 1.25% Ratio of net investment income (loss) to average net assets 2.35% 2.33% 2.43% 3.12% 3.36% Portfolio turnover rate 44% 43% 81% 41% 28% Net assets, end of period (in thousands) $178,770 $156,110 $116,815 $48,264 $31,169 Ratios with no waiver of fees and assumption of expenses by Amundi Pioneer formerly PIM and no reduction for fees paid indirectly: Total expenses to average net assets 1.24% 1.21% 1.21% 1.32% 1.35% Net investment income (loss) to average net assets 2.21% 2.22% 2.32% 3.05% 3.26% ================================================================================================================================= * 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. ** Beginning with the fiscal year ended June 30, 2017, the Fund was audited by Ernst & Young LLP. The previous year was audited by another independent registered public accounting firm. (a) The per share data presented above is based on the average shares outstanding for the period presented. The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/17 103 Financial Highlights (continued) --------------------------------------------------------------------------------------------------------------------------------- Year Year Year Year Year Ended Ended Ended Ended Ended 6/30/17 6/30/16** 6/30/15** 6/30/14** 6/30/13 --------------------------------------------------------------------------------------------------------------------------------- Class Y Net asset value, beginning of period $ 9.67 $ 9.59 $ 9.79 $ 9.58 $ 9.65 --------------------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) $ 0.28(a) $ 0.27(a) $ 0.30 $ 0.36 $ 0.39 Net realized and unrealized gain (loss) on investments (0.02) 0.12 (0.15) 0.24 (0.07) --------------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 0.26 $ 0.39 $ 0.15 $ 0.60 $ 0.32 --------------------------------------------------------------------------------------------------------------------------------- Distribution to shareowners: Net investment income $ (0.31) $ (0.29) $ (0.31) $ (0.39) $ (0.39) Net realized gain -- (0.02) (0.04) -- -- --------------------------------------------------------------------------------------------------------------------------------- Total distributions $ (0.31) $ (0.31) $ (0.35) $ (0.39) $ (0.39) --------------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ (0.05) $ 0.08 $ (0.20) $ 0.21 $ (0.07) --------------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 9.62 $ 9.67 $ 9.59 $ 9.79 $ 9.58 ================================================================================================================================= Total return* 2.76% 4.22% 1.59% 6.41% 3.34% Ratio of net expenses to average net assets 0.58% 0.58% 0.58% 0.66% 0.66% Ratio of net investment income (loss) to average net assets 2.87% 2.85% 2.95% 3.72% 3.97% Portfolio turnover rate 44% 43% 81% 41% 28% Net assets, end of period (in thousands) $2,558,262 $2,136,681 $1,644,161 $871,801 $916,182 Ratios with no waiver of fees and assumption of expenses by Amundi Pioneer formerly PIM and no reduction for fees paid indirectly: Total expenses to average net assets 0.59% 0.59% 0.58% 0.66% 0.66% Net investment income (loss) to average net assets 2.86% 2.84% 2.95% 3.72% 3.97% ================================================================================================================================= * 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. ** Beginning with the fiscal year ended June 30, 2017, the Fund was audited by Ernst & Young LLP. The previous year was audited by another independent registered public accounting firm. (a) The per share data presented above is based on the average shares outstanding for the period presented. The accompanying notes are an integral part of these financial statements. 104 Pioneer Bond Fund | Annual Report | 6/30/17 Notes to Financial Statements | 6/30/17 1. Organization and Significant Accounting Policies Pioneer Bond Fund (the Fund) is 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 seek current income consistent with preservation of capital. The Fund offers five classes of shares designated as Class A, Class C, Class K, Class R and Class Y shares. Class Z shares were converted to Class Y shares on August 7, 2015. Each class of shares represents an interest in the same portfolio of investments of the Fund and has identical rights (based on relative net asset values) to assets and liquidation proceeds. Share classes can bear different rates of class-specific fees and expenses such as transfer agent and distribution fees. Differences in class-specific fees and expenses will result in differences in net investment income and, therefore, the payment of different dividends from net investment income earned by each class. The Amended and Restated Declaration of Trust of the Fund gives the Board of Trustees the flexibility to specify either per-share voting or dollar-weighted voting when submitting matters for shareholder approval. Under per-share voting, each share of a class of the Fund is entitled to one vote. Under dollar-weighted voting, a shareholder's voting power is determined not by the number of shares owned, but by the dollar value of the shares on the record date. Each share class has exclusive voting rights with respect to matters affecting only that class, including with respect to the distribution plan for that class. There is no distribution plan for Class K or Class Y shares. On July 3, 2017, Amundi acquired Pioneer Investments, a group of asset management companies located throughout the world. Amundi, one of the world's largest asset managers, is headquartered in Paris, France. As a result of the transaction, Pioneer Investment Management, Inc., the Fund's investment adviser, became an indirect wholly owned subsidiary of Amundi and Amundi's wholly owned subsidiary, Amundi USA, Inc. Prior to July 3, 2017, Pioneer Investments was owned by Pioneer Global Asset Management S.p.A., a wholly owned subsidiary of UniCredit S.p.A. In connection with the transaction, the names of the Fund's investment adviser and principal underwriter changed. Effective July 3, 2017, the name of Pioneer Investment Management, Inc. changed to Amundi Pioneer Asset Management, Inc. and the name of Pioneer Funds Distributor, Inc. changed to Amundi Pioneer Distributor, Inc. In October 2016, the Securities and Exchange Commission (SEC) released its Final Rule on Investment Company Reporting Modernization. In addition to introducing two new regulatory reporting forms (Form N-PORT and Form N-CEN), the Final Pioneer Bond Fund | Annual Report | 6/30/17 105 Rule amends Regulation S-X, which impacts financial statement presentation, particularly related to the presentation of derivative investments. Financial statements filed with the SEC on or after August 1, 2017 are required to be in compliance with the amendments to Regulation S-X. Although still evaluating the impact of these amendments, management expects the Fund's adoption to be limited to additional financial statement disclosures. The Fund's financial statements have been prepared in conformity with U.S. generally accepted accounting principles (U.S. GAAP) that require the management of the Fund to 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 Fund is an investment company and follows investment company accounting and reporting guidance under U.S. GAAP. The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements: A. Security Valuation The net asset value of the Fund is computed once daily, on each day the New York Stock Exchange (NYSE) is open, as of the close of regular trading on the NYSE. Fixed income securities are valued by using prices supplied by independent pricing services, which consider such factors as market prices, market events, quotations from one or more brokers, Treasury spreads, yields, maturities and ratings, or may use a pricing matrix or other fair value methods or techniques to provide an estimated value of the security or instrument. A pricing matrix is a means of valuing a debt security on the basis of current market prices for other debt securities, historical trading patterns in the market for fixed income securities and/or other factors. Non-U.S. debt securities that are listed on an exchange will be valued at the bid price obtained from an independent third party pricing service. When independent third party pricing services are unable to supply prices, or when prices or market quotations are considered to be unreliable, the value of that security may be determined using quotations from one or more broker-dealers. Loan interests 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 third party pricing service. If price information is not available from Loan Pricing Corporation, or if the price information is deemed to be unreliable, price information will be obtained from an 106 Pioneer Bond Fund | Annual Report | 6/30/17 alternative loan interest pricing service. If no reliable price quotes are available from either the primary or alternative pricing service, broker quotes will be solicited. Event-linked bonds or catastrophe bonds are valued at the bid price obtained from an independent third party pricing service. Other insurance linked securities (including sidecars, collateralized reinsurance and industry loss warranties) may be valued at the bid price obtained from an independent pricing service, or through a third party using a pricing matrix, insurance industry valuation models, or other fair value methods or techniques to provide an estimated value of the instrument. Equity securities that have traded on an exchange are valued by using the last sale price on the principal exchange where they are traded. Equity securities that have not traded on the date of valuation, or securities for which sale prices are not available, generally are valued using the mean between the last bid and asked prices or, if both last bid and asked prices are not available, at the last quoted bid price. Last sale and bid and asked prices are provided by independent third party pricing services. In the case of equity securities not traded on an exchange, prices are typically determined by independent third party pricing services using a variety of techniques and methods. Over the counter swap contracts, including interest rate swaps, caps and floors (other than centrally cleared swap contracts) are valued at the dealer quotations obtained from reputable International Swap Dealer Association members. Centrally cleared swaps are valued at the daily settlement price provided by the central clearing counterparty. Futures contracts are generally valued at the closing settlement price established by the exchange on which they are traded. Repurchase agreements are valued at par. Cash may include overnight time deposits at approved financial institutions. Securities or loan interests for which independent pricing services or broker-dealers are unable to supply prices or for which market prices and/or quotations are not readily available or are considered to be unreliable are valued by a fair valuation team comprised of certain personnel of Amundi Pioneer Asset Management, Inc. (Amundi Pioneer), formerly Pioneer Investment Management, Inc. (PIM), the Fund's investment adviser, pursuant to procedures adopted by the Fund's Board of Trustees. Amundi Pioneer's formerly PIM's, fair valuation team uses fair value methods approved by the Valuation Committee of the Board of Trustees. Amundi Pioneer's formerly PIM's, fair valuation team is responsible for monitoring developments that may impact fair valued securities and for discussing and assessing fair values on an ongoing basis, and at least quarterly, with the Valuation Committee of the Board of Trustees. Pioneer Bond Fund | Annual Report | 6/30/17 107 Inputs used when applying fair value methods to value a security may include credit ratings, the financial condition of the company, current market conditions and comparable securities. The Fund may use fair value methods if it is determined that a significant event has occurred after the close of the exchange or market on which the security trades and prior to the determination of the Fund's net asset value. Examples of a significant event might include political or economic news, corporate restructurings, natural disasters, terrorist activity or trading halts. Thus, the valuation of the Fund's securities may differ significantly from exchange prices and such differences could be material. At June 30, 2017, one security was valued using fair value methods (in addition to securities valued using prices supplied by independent pricing services, broker-dealers or using a third party insurance industry pricing model) representing less than 0.1% of net assets. B. Investment Income and Transactions Principal amounts of mortgage-backed securities, asset-backed securities and corporate bonds are adjusted for monthly paydowns. Premiums and discounts related to certain mortgage-backed securities are amortized or accreted in proportion to the monthly paydowns. All discounts/premiums on purchase prices of debt securities are accreted/amortized for financial reporting purposes over the life of the respective securities, and such accretion/amortization is included in interest income. Dividend income is recorded on the ex-dividend date, except that certain dividends from foreign securities where the ex-dividend date may have passed are recorded as soon as the Fund becomes aware of the ex-dividend data in the exercise of reasonable diligence. Interest income, 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. Security transactions are recorded as of trade date. Gains and losses on sales of investments are calculated on the identified cost method for both financial reporting and federal income tax purposes. C. Federal Income Taxes It is the Fund's policy to comply with the requirements of the Internal Revenue Code applicable to regulated investment companies and to distribute all of its net taxable income and net realized capital gains, if any, to its shareowners. Therefore, no provision for federal income taxes is required. As of June 30, 2017, the Fund did not accrue any interest or penalties with respect to uncertain tax positions, which, if applicable, would be recorded as 108 Pioneer Bond Fund | Annual Report | 6/30/17 an income tax expense in the Statement of Operations. Tax returns filed within the prior three years remain subject to examination by Federal and State tax authorities. The amount and character of income and capital gain distributions to shareowners are determined in accordance with federal income tax rules, which may differ from U.S. GAAP. Distributions in excess of net investment income or net realized gains are temporary overdistributions for financial statement purposes resulting from differences in the recognition or classification of income or distributions for financial statement and tax purposes. Capital accounts within the financial statements are adjusted for permanent book/tax differences to reflect tax character, but are not adjusted for temporary differences. At June 30, 2017, the Fund reclassified $13,817,391 to increase undistributed net investment income and $13,817,391 to increase accumulated net realized loss on investments, swap contracts and futures contracts to reflect permanent book/tax differences. These adjustments have no impact on net assets or the results of operations. During the year ended June 30, 2017, a capital loss carryforward of $36,810,599 was utilized to offset net realized gains by the Fund. At June 30, 2017, the Fund was permitted to carry forward indefinitely $3,027,137 of short-term losses and $7,257,496 in long-term losses under the Regulated Investment Company Modernization Act of 2010 without limitation. Included in these amounts are $911,824 of short-term losses and $6,019,010 of long-term losses which, as a result of the reorganization with Pioneer Government Income Fund on March 18, 2016 may be subject to limitations imposed by the Internal Revenue Code. Since unlimited losses are required to be used first, loss carryforwards that are subject to expiration may be more likely to expire unused. The tax character of distributions paid during the years ended June 30, 2017 and June 30, 2016 were as follows: --------------------------------------------------------------------------- 2017 2016 --------------------------------------------------------------------------- Distributions paid from: Ordinary income $132,660,990 $101,613,304 Long-term capital gain -- 7,319,392 --------------------------------------------------------------------------- Total $132,660,990 $108,932,696 =========================================================================== Pioneer Bond Fund | Annual Report | 6/30/17 109 The following shows the components of distributable earnings on a federal income tax basis at June 30, 2017: ---------------------------------------------------------------------------- 2017 ---------------------------------------------------------------------------- Distributable earnings: Undistributed ordinary income $10,166,400 Capital Loss Carryforward (6,870,781) Capital Loss Carryforward Limited (3,413,852) Current year dividends payable (2,189,906) Net unrealized appreciation 30,101,029 ---------------------------------------------------------------------------- Total $27,792,890 ============================================================================ The difference between book-basis and tax-basis net unrealized appreciation is attributable to the tax deferral of losses on wash sales, adjustments relating to catastrophe bonds, the tax treatment of premium and amortization and the mark-to-market of futures contracts. D. Fund Shares The Fund records sales and repurchases of its shares as of trade date. Amundi Pioneer Distributor, Inc., formerly Pioneer Funds Distributor, Inc. (PFD), the principal underwriter for the Fund, earned $63,843 in underwriting commissions on the sale of Class A shares during the year ended June 30, 2017. 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, Class C, and Class R shares of the Fund, respectively (see Note 4). Class K and Class Y shares do not pay distribution fees. All expenses and fees paid to the Fund's transfer agent, for its services are allocated among the classes of shares based on the number of accounts in each class and the ratable allocation of related out-of-pocket expenses (see Note 3). 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 K, Class R and Class Y shares can reflect different transfer agent and distribution expense rates. 110 Pioneer Bond Fund | Annual Report | 6/30/17 F. Insurance-Linked Securities (ILS) The Fund invests in event-linked bonds. Event-linked bonds are floating rate debt obligations for which the return of principal and the payment of interest are contingent on the non-occurrence of a pre-defined "trigger" event, such as a hurricane or an earthquake of a specific magnitude. The trigger event's magnitude may be based on losses to a company or industry, industry indexes or readings of scientific instruments, or may be based on specified actual losses. If a trigger event, as defined within the terms of an event-linked bond occurs, the Fund may lose a portion or all of its accrued interest and/or principal invested in such event-linked bond. The Fund is entitled to receive principal and interest payments so long as no trigger event occurs of the description and magnitude specified by the instrument. In addition to the specified trigger events, event-linked bonds may expose the Fund to other risks, including but not limited to issuer (credit) default, adverse regulatory or jurisdictional interpretations and adverse tax consequences. The Fund's investments in ILS may include special purpose vehicles ("SPVs") or similar instruments structured to comprise a portion of a reinsurer's catastrophe-oriented business, known as quota share instruments (sometimes referred to as reinsurance sidecars), or to provide reinsurance relating to specific risks to insurance or reinsurance companies through a collateralized instrument, known as collateralized reinsurance. Structured reinsurance investments also may include industry loss warranties ("ILWs"). A traditional ILW takes the form of a bilateral reinsurance contract, but there are also products that take the form of derivatives, collateralized structures, or exchange traded instruments. Structured reinsurance investments, including quota share instruments, collateralized reinsurance investments and ILWs, generally are subject to the same risks as event-linked bonds. In addition, where the instruments are based on the performance of underlying reinsurance contracts, the Fund has limited transparency into the individual underlying contracts and therefore must rely upon the risk assessment and sound underwriting practices of the issuer. Accordingly, it may be more difficult for PIM to fully evaluate the underlying risk profile of the Fund's structured reinsurance investments and therefore the Fund's assets are placed at greater risk of loss than if PIM had more complete information. Structured reinsurance instruments generally will be considered illiquid securities by the Fund. These securities may be difficult to purchase, sell or unwind. Illiquid securities also may be difficult to value. If the Fund is forced to sell an illiquid asset, the Fund may be forced to sell at a loss. Pioneer Bond Fund | Annual Report | 6/30/17 111 G. Risks Interest rates in the U.S. recently have been historically low, so the Fund faces a heightened risk that interest rates may rise. A general rise in interest rates may cause investors to move out of fixed income securities on a large scale, which could adversely affect the price and liquidity of fixed income securities and could also result in increased redemptions from the Fund. At times, the Fund's investments may represent industries or industry sectors that are interrelated or have common risks, making the Fund more susceptible to any economic, political, or regulatory developments or other risks affecting those industries and sectors. The Fund's prospectus contains unaudited information regarding the Fund's principal risks. Please refer to that document when considering the Fund's principal risks. H. Futures Contracts The Fund may enter into futures transactions in order to attempt to hedge against changes in interest rates, securities prices and currency exchange rates or to seek to increase total return. Futures contracts are types of derivatives. All futures contracts entered into by the Fund are traded on a futures exchange. Upon entering into a futures contract, the Fund is required to deposit with a broker an amount of cash or securities equal to the minimum "initial margin" requirements of the associated futures exchange. The amount of cash deposited with the broker as collateral at June 30, 2017 was $4,400,450 and is included in "Restricted Cash" in the Statement of Assets and Liabilities. Subsequent payments for futures contracts ("variation margin") are paid or received by the Fund, depending on the daily fluctuation in the value of the contracts, and are recorded by the Fund as unrealized appreciation or depreciation. When the contract is closed, the Fund realizes a gain or loss equal to the difference between the opening and closing value of the contract as well as any fluctuation in foreign currency exchange rates where applicable. The use of 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. The average value of contracts open during the year ended June 30, 2017 was $(514,754,217). 112 Pioneer Bond Fund | Annual Report | 6/30/17 At June 30, 2017, open futures contracts were as follows: ---------------------------------------------------------------------------------------------- Number of Contracts Unrealized Long/ Settlement Appreciation/ Description Counterparty (Short) Month Value (Depreciation) ---------------------------------------------------------------------------------------------- U.S. Long Bond (CBOT) Citibank NA 599 9/17 $ 92,058,813 $ 809,496 U.S. Ultra Bond (CBOT) Citibank NA 576 9/17 95,544,000 1,717,508 U.S. 10 Year Ultra Bond (CBOT) Citibank NA 173 9/17 23,322,563 (162,149) U.S. 10 Year Note (CBOT) Citibank NA (6,171) 9/17 (774,653,345) 533,150 U.S. 2 Year Note (CBOT) Citibank NA 845 9/17 182,612,423 (133,958) U.S. 5 Year Note (CBOT) Citibank NA (420) 9/17 (49,491,094) 86,264 ---------------------------------------------------------------------------------------------- Total $(430,606,640) $ 2,850,311 ============================================================================================== CBOT Chicago Board of Trade I. Repurchase Agreements Repurchase agreements are arrangements under which the Fund purchases securities from a broker-dealer or a bank, called the counterparty, upon the agreement of the counterparty to repurchase the securities from the Fund at a later date, and at a specific price, which is typically higher than the purchase price paid by the Fund. The securities purchased serve as the Fund's collateral for the obligation of the counterparty to repurchase the securities. The value of the collateral, including accrued interest, is required to be equal to or in excess of the repurchase price. The collateral for all repurchase agreements is held in safekeeping in the customer-only account of the Fund's custodian or a subcustodian of the Fund. Amundi Pioneer, formerly PIM is responsible for determining that the value of the collateral remains at least equal to the repurchase price. In the event of a default by the counterparty, the Fund is entitled to sell the securities, but the Fund may not be able to sell them for the price at which they were purchased, thus causing a loss to the Fund. Additionally, if the counterparty becomes insolvent, there is some risk that the Fund will not have a right to the securities, or the immediate right to sell the securities. Open repurchase agreements at June 30, 2017 are listed at the end of the Schedule of Investments. J. Credit Default Swap Agreements A credit default swap is a contract between a buyer of protection and a seller of protection against a pre-defined credit event on an underlying reference obligation, which may be a single security or a basket or index of securities. The Fund may sell or buy credit default swap contracts to seek to increase the Fund's income, or to attempt to hedge the risk of default on portfolio securities. A credit default swap index is used to hedge risk or take a position on a basket of credit entities or indices. As a seller of protection, the Fund would be required to pay the notional (or other agreed-upon) value of the referenced debt obligation to the counterparty in the event of a default by a Pioneer Bond Fund | Annual Report | 6/30/17 113 U.S. or foreign corporate issuer of a debt obligation, which would likely result in a loss to the Fund. In return, the Fund would receive from the counterparty a periodic stream of payments during the term of the contract provided that no event of default occurred. The maximum exposure of loss to the seller would be the notional value of the credit default swaps outstanding. If no default occurs, the Fund would keep the stream of payments and would have no payment obligation. The Fund may also buy credit default swap contracts in order to hedge against the risk of default of debt securities, in which case the Fund would function as the counterparty referenced above. When the Fund enters into a credit default swap contract, the protection buyer makes an upfront or periodic payment to the protection seller in exchange for the right to receive a contingent payment. An upfront payment made by the Fund, as the protection buyer, is recorded as an asset in the Statement of Assets and Liabilities. Periodic payments received or paid by the Fund are recorded as realized gains or losses in the Statement of Operations. Credit default swap contracts are marked-to-market daily using valuations supplied by independent sources and the change in value, if any, is recorded as unrealized appreciation or depreciation in the Statement of Assets and Liabilities. Payments received or made as a result of a credit event or upon termination of the contract are recognized, net of the appropriate amount of the upfront payment, as realized gains or losses in the Statement of Operations. Credit default swap contracts involving the sale of protection may involve greater risks than if the Fund had invested in the referenced debt instrument directly. Credit default swap contracts are subject to general market risk, liquidity risk, counterparty risk and credit risk. If the Fund is a protection buyer and no credit event occurs, it will lose its investment. If the Fund is a protection seller and a credit event occurs, the value of the referenced debt instrument received by the Fund, together with the periodic payments received, may be less than the amount the Fund pays to the protection buyer, resulting in a loss to the Fund. Certain swap contracts that are cleared through a central clearinghouse are referred to as centrally cleared swaps. All payments made or received by the Fund are pursuant to a centrally cleared swap contract with the central clearing party rather than the original counterparty. Upon entering into a centrally cleared swap contract, the Fund is required to make an initial margin deposit, either in cash or in securities. The daily change in value on open centrally cleared contracts is recorded as variation margin on centrally cleared swaps on the Statement of Assets and Liabilities. The amount of cash deposited with a broker as collateral at June 30, 2017 was $1,760,949 and is recorded within "Restricted Cash" on the Statement of Assets and Liabilities. 114 Pioneer Bond Fund | Annual Report | 6/30/17 Open credit default swap contracts at June 30, 2017 are listed at the end of Schedule of Investments. The average value of swap contracts open during the year ended June 30, 2017 was $(709,541). 2. Management Agreement Amundi Pioneer, formerly PIM manages the Fund's portfolio. Management fees are calculated daily at the annual rate of 0.40% of the Fund's average daily net assets. For the year ended June 30, 2017, the effective management fee (excluding waivers and/or assumption of expenses) was equal to 0.40% of the Fund's average daily net assets. Amundi Pioneer, formerly PIM has contractually agreed to limit ordinary operating expenses to the extent required to reduce Fund expenses to 0.85%, 1.10%, and 0.58% of the average daily net assets attributable to Class A, Class R and Class Y shares, respectively. Fees waived and expenses reimbursed during the year ended June 30, 2017 are reflected on the Statement of Operations. These expense limitations are in effect through November 1, 2019. There can be no assurance that Amundi Pioneer, formerly 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 $542,314 in management fees, administrative costs and certain other reimbursements payable to Amundi Pioneer, formerly PIM at June 30, 2017. 3. Transfer Agent Boston Financial Data Services serves as the transfer agent to the Fund at negotiated rates. Transfer agent fees and payables shown on the Statement of Operations and the Statement of Assets and Liabilities, respectively, include sub-transfer agent expenses incurred through the Fund's omnibus relationship contracts. In addition, the Fund reimbursed the transfer agent for out-of-pocket expenses incurred by the transfer agent related to shareholder communications activities such as proxy and statement mailings, outgoing phone calls and omnibus relationship contracts. For the year ended June 30, 2017, such out-of-pocket expenses by class of shares were as follows: Pioneer Bond Fund | Annual Report | 6/30/17 115 -------------------------------------------------------------------------------- Shareholder Communications: -------------------------------------------------------------------------------- Class A $104,626 Class C 7,039 Class K 3,622 Class R 68 Class Y 74,199 -------------------------------------------------------------------------------- Total $189,554 ================================================================================ 4. Distribution and Service Plans The Fund has adopted a Distribution Plan pursuant to Rule 12b-1 of the Investment Company Act of 1940 with respect to its Class A, Class C and Class R shares. Pursuant to the Plan, the Fund pays Amundi Pioneer Distributor, Inc., formerly 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 Amundi Pioneer Distributor, Inc., formerly PFD 1.00% of the average daily net assets attributable to Class C shares. The fee for Class C shares consists of a 0.25% service fee and a 0.75% distribution fee paid as compensation for personal services and/or account maintenance services or distribution services with regard to Class C shares. Pursuant to the Plan, the Fund further pays Amundi Pioneer Distributor, Inc., formerly PFD 0.50% of the average daily net assets attributable to Class R shares for distribution services. Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $131,287 in distribution fees payable to Amundi Pioneer Distributor, Inc., formerly PFD at June 30, 2017. The Fund also has adopted a separate service plan for Class R shares (Service Plan). The Service Plan authorizes the Fund to pay securities dealers, plan administrators or other service organizations that agree to provide certain services to retirement plans or plan participants holding shares of the Fund a service fee of up to 0.25% of the Fund's average daily net assets attributable to Class R shares held by such plans. In addition, redemptions of each class of shares (except Class K, Class R and Class Y shares) may be subject to a contingent deferred sales charge (CDSC). A CDSC of 1.00% may be imposed on redemptions of certain net asset value purchases of Class A shares within 12 months of purchase. Redemptions of Class C shares within 12 months of purchase are subject to a CDSC of 1.00%, based on the lower of cost or market value of shares being redeemed. Shares purchased as part of an exchange remain subject to any CDSC that applied to the original purchase of those shares. There is no CDSC for Class R or Class Y shares. Proceeds from the CDSC are paid to Amundi Pioneer Distributor, Inc., formerly PFD. For the year ended June 30, 2017, CDSC in the amount of $14,907 were paid to Amundi Pioneer Distributor, Inc., formerly PFD. 116 Pioneer Bond Fund | Annual Report | 6/30/17 5. Line of Credit Facility The Fund, along with certain other funds in the Pioneer Family of Funds (the Funds), participates in a committed, unsecured revolving line of credit facility. Borrowings are used solely for temporary or emergency purposes. The Fund may borrow up to the lesser of the amount available under the facility or the limits set for borrowing by the Fund's prospectus and the 1940 Act. The credit facility in which the Fund participated until February 9, 2016 was in the amount of $240 million. The credit facility in which the fund participated until February 7, 2017 was in the amount of $220 million. Effective February 8, 2017, the Fund participated in a facility that is in the amount of $195 million. Under such facility, depending on the type of loan, interest on borrowings is payable at the London Interbank Offered Rate (LIBOR) plus 0.85% on an annualized basis, or the Alternate Base Rate, which is the greater of (a) the facility's administrative agent's daily announced prime rate on the borrowing date, (b) 2% plus the Federal Funds Rate on the borrowing date and (c) 2% plus the overnight Eurodollar rate on the borrowing date. The Funds pay an annual commitment fee to participate in a credit facility. The commitment fee is allocated among participating Funds based on an allocation schedule set forth in the credit agreement. For the year ended June 30, 2017, the Fund had no borrowings under the credit facility. 6. Assets and Liabilities Offsetting The Fund has entered into an International Swaps and Derivatives Association, Inc. Master Agreement ("ISDA Master Agreement") or similar agreement with substantially all its derivative counterparties. An ISDA Master Agreement is a bilateral agreement between the Fund and a counterparty that governs the trading of certain OTC derivatives and typically contains, among other things, close-out and set-off provisions which apply upon the occurrence of an event of default and/or a termination event as defined under the relevant ISDA Master Agreement. The ISDA Master Agreement may also give a party the right to terminate all transactions traded under such agreement if, among other things, there is deterioration in the credit quality of the other party. Upon an event of default or a termination of the ISDA Master Agreement, the non-defaulting party has the right to close out all transactions under such agreement and to net amounts owed under each transaction to determine one net amount payable by one party to the other. The right to close out and net payments across all transactions under the ISDA Master Agreement could result in a reduction of the Fund's credit risk to its counterparty equal to any amounts payable by the Fund under the applicable transactions, if any. However, the Fund's right to set off may be restricted or prohibited by the bankruptcy or insolvency laws of the particular jurisdiction to which a specific ISDA counterparty is subject. Pioneer Bond Fund | Annual Report | 6/30/17 117 The collateral requirements for derivatives transactions under an ISDA Master Agreement are governed by a credit support annex to the ISDA Master Agreement. Collateral requirements are generally determined at the close of business each day and are typically based on changes in market values for each transaction under an ISDA Master Agreement and netted into one amount for such agreement. Generally, the amount of collateral due from or to a counterparty is subject to threshold (a "minimum transfer amount") before a transfer is required, which may vary by counterparty. Collateral pledged for the benefit of the Fund and/or counterparty is held in segregated accounts by the Fund's custodian and cannot be sold, re-pledged, assigned or otherwise used while pledged. Cash that has been segregated to cover the Fund's collateral obligations, if any, will be reported separately in the Statement of Assets and Liabilities as "Restricted cash". Securities pledged by the Fund as collateral, if any, are identified as such in the Schedule of Investments. Financial instruments subject to an enforceable master netting agreement such as an ISDA Master Agreement have been offset on the Statement of Assets and Liabilities, with the exception of forward foreign currency contracts, which are shown on a gross basis. The following charts show gross assets and liabilities of the Fund as of June 30, 2017. ------------------------------------------------------------------------------------------------ Derivative Assets Derivatives Non-Cash Cash Net Amount Subject to Master Available for Collateral Collateral of Derivative Counterparty Netting Agreement Offset Received (a) Received (a) Assets (b) ------------------------------------------------------------------------------------------------ JP Morgan $74,007 $-- $-- $-- $74,007 ------------------------------------------------------------------------------------------------ Total $74,007 $-- $-- $-- $74,007 ================================================================================================ ------------------------------------------------------------------------------------------------ Derivative Liabilities Derivatives Non-Cash Cash Net Amount Subject to Master Available for Collateral Collateral of Derivative Counterparty Netting Agreement Offset Pledged (a) Pledged (a) Liabilities (c) ------------------------------------------------------------------------------------------------ JP Morgan $-- $-- $-- $-- $-- ------------------------------------------------------------------------------------------------ Total $-- $-- $-- $-- $-- ================================================================================================ (a) The amount presented here may be less than the total amount of collateral received/pledged, as the net amount of derivative assets and liabilities cannot be less than $0. (b) Represents the net amount due from the counterparty in the event of default. (c) Represents the net amount payable to the counterparty in the event of default. 7. Additional Disclosures about Derivative Instruments and Hedging Activities: The Fund's use of derivatives subjects it to the following risks: Interest rate risk relates to the fluctuations in the value of interest-bearing securities due to changes in the prevailing levels of market interest rates. Credit risk relates to the ability of the issuer of a financial instrument to make further principal or interest payments on an obligation or commitment that it has to the Fund. 118 Pioneer Bond Fund | Annual Report | 6/30/17 Foreign exchange rate risk relates to fluctuations in the value of an asset or liability due to changes in currency exchange rates. Equity risk relates to the fluctuations in the value of financial instruments as a result of changes in market prices (other than those arising from interest rate risk or foreign exchange risk), whether caused by factors specific to an individual investment, its issuer, or all factors affecting all instruments traded in a market or market segment. Commodity risk relates to the risk that the value of a commodity or commodity index will fluctuate based on increases or decreases in the commodities market and factors specific to a particular industry or commodity. The fair value of open derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) by risk exposure at June 30, 2017 was as follows: ----------------------------------------------------------------------------------------- Foreign Statement of Assets Interest Credit Exchange Equity Commodity and Liabilities Rate Risk Risk Rate Risk Risk Risk ----------------------------------------------------------------------------------------- Assets Unrealized appreciation on futures contracts* $3,146,419 $ -- $ -- $ -- $ -- Unrealized appreciation on swap contracts -- 89,159 -- -- -- ----------------------------------------------------------------------------------------- Total Value $3,146,419 $ 89,159 $ -- $ -- $ -- ========================================================================================= Liabilities Unrealized depreciation on futures contracts* $ 296,108 $ -- $ -- $ -- $ -- ----------------------------------------------------------------------------------------- Total Value $ 296,108 $ -- $ -- $ -- $ -- ========================================================================================= * Reflects unrealized appreciation/depreciation of futures contracts (see Note 1H). The current day's variation margin is disclosed on the Statement of Assets and Liabilities. The effect of derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) on the Statement of Operations by risk exposure at June 30, 2017 was as follows: ------------------------------------------------------------------------------------------ Foreign Interest Credit Exchange Equity Commodity Statement of Operations Rate Risk Risk Rate Risk Risk Risk ------------------------------------------------------------------------------------------ Net realized gain (loss) on Futures contracts $ 7,898,018 $ -- $ -- $ -- $ -- Swap contracts -- (376,713) -- -- -- ------------------------------------------------------------------------------------------ Total Value $ 7,898,018 $(376,713) $ -- $ -- $ -- ========================================================================================== Change in net unrealized appreciation (depreciation) on Futures contracts $20,153,109 $ -- $ -- $ -- $ -- Swap contracts -- 89,159 -- -- -- ------------------------------------------------------------------------------------------ Total Value $20,153,109 $ 89,159 $ -- $ -- $ -- ========================================================================================== Pioneer Bond Fund | Annual Report | 6/30/17 119 8. Reorganization Information On March 18, 2016 ("Closing Date"), Pioneer Government Income Fund (the "predecessor fund") was reorganized into the Fund. The purpose of this transaction was to combine two funds (managed by Amundi Pioner, formerly PIM) with similar investment objectives. This tax-free reorganization was accomplished by exchanging the assets and liabilities of the predecessor fund for shares of the Fund. Shareowners holding Class A, Class C and Class Y of the predecessor fund received Class A, Class C and Class Y shares of the Fund, respectively, in the reorganization. The investment portfolio of the predecessor fund, with an aggregate value of $100,781,776 and an identified cost of $96,686,438 at March 18, 2016, was the principal asset acquired by the Fund. For financial reporting purposes, assets received and shares issued by the Fund were recorded at net asset value, however, the cost basis of the investments received from the predecessor fund was carried forward to align ongoing reporting of the Fund's realized and unrealized gains and losses with amounts distributable to shareowners for tax reporting purposes. The following charts shows the details of the reorganization as of the Closing Date: ----------------------------------------------------------------------------------------------- Pioneer Government Income Fund Pioneer Bond Fund Pioneer Bond Fund (Pre-Reorganization) (Pre-Reorganization) (Post-Reorganization) ----------------------------------------------------------------------------------------------- Net Assets Class A $ 83,223,137 $1,052,667,521 $1,135,890,658 Class C 14,846,083 117,661,581 132,507,664 Class K -- 311,330,352 311,330,352 Class R -- 146,651,259 146,651,259 Class Y 5,219,995 1,927,283,548 1,932,503,543 ----------------------------------------------------------------------------------------------- Total Net Assets $103,289,215 $3,555,594,261 $3,658,883,476 ----------------------------------------------------------------------------------------------- Shares Outstanding Class A 8,893,098 109,849,580 118,536,782 Class C 1,584,984 12,417,206 13,983,248 Class K -- 32,499,467 32,499,467 Class R -- 15,165,715 15,165,715 Class Y 558,355 203,011,669 203,561,722 -------------------------------------------------------------------------------------------- Shares issued Exchange Ratio in reorganization -------------------------------------------------------------------------------------------- Class A 0.9768 8,687,202 Class C 0.9880 1,566,042 Class Y 0.9851 550,053 ------------------------------------------------------------------------------------------------- Unrealized Appreciation on Accumulated Gain Closing Date (Loss) on Closing Date ------------------------------------------------------------------------------------------------- Fund $11,796,814 $ 818,031 Predecessor Fund 4,095,338 (9,616,481) 120 Pioneer Bond Fund | Annual Report | 6/30/17 Assuming the Reorganization had been completed on July 1, 2015, the pro-forma results of operations for the fiscal year ended June 30, 2016, were as follows: Net Investment income (loss) $ 95,529,990 Net realized and unrealized gain (loss) 51,270,329 -------------------------------------------------------------------------------- Change in net assets resulting from operations $146,800,319 -------------------------------------------------------------------------------- Because the combined investment portfolios have been managed as a single integrated portfolio since the reorganization was completed, it is not practical to separate the amounts of revenue and earnings of the Fund that have been included in the Statements of Operations since the Reorganization was consummated. 9. Results of Shareholder Meeting At a special meeting held on June 13, 2017, shareholders of the Fund were asked to consider the proposals described below. A report of the total votes cast by the Fund's shareholders follows: -------------------------------------------------------------------------------------------- For Against Abstain Broker Non-Votes -------------------------------------------------------------------------------------------- Proposal 1 - To approve 176,463,105.388 3,303,014.855 8,419,304.581 41,911,653.832 a New Management Agreement with the Adviser --------------------------------------------------------------------------------------------- For Withhold --------------------------------------------------------------------------------------------- Proposal 2 - To elect Trustees --------------------------------------------------------------------------------------------- David R. Bock 219,918,842.080 10,178,236.576 --------------------------------------------------------------------------------------------- Benjamin M. Friedman 221,205,146.818 8,891,931.838 --------------------------------------------------------------------------------------------- Margaret B.W. Graham 221,466,338.552 8,630,740.104 --------------------------------------------------------------------------------------------- Lisa M. Jones 221,614,158.850 8,482,919.806 --------------------------------------------------------------------------------------------- Lorraine H. Monchak 221,623,949.919 8,473,128.737 --------------------------------------------------------------------------------------------- Thomas J. Perna 220,511,437.487 9,585,641.169 --------------------------------------------------------------------------------------------- Marguerite A. Piret 221,593,789.365 8,503,289.291 --------------------------------------------------------------------------------------------- Fred J. Ricciardi 221,476,848.042 8,620,230.614 --------------------------------------------------------------------------------------------- Kenneth J. Taubes 221,482,103.491 8,614,975.165 --------------------------------------------------------------------------------------------- --------------------------------------------------------------------------------------------- For Against Abstain Broker Non-Votes --------------------------------------------------------------------------------------------- Proposal 3 - To convert 132,388,077.580 44,465,093.788 11,332,235.426 41,911,671.862 investment objective(s) from fundamental to non-fundamental Proposal 4 - To change 160,531,894.163 15,794,355.899 11,859,164.711 41,911,663.882 Pioneer Bond Fund's investment objectives Pioneer Bond Fund | Annual Report | 6/30/17 121 Report of Independent Registered Public Accounting Firm To the Board of Trustees and the Shareowners of Pioneer Bond Fund: -------------------------------------------------------------------------------- We have audited the accompanying statement of assets and liabilities of Pioneer Bond Fund (the "Fund"), including the schedule of investments, as of June 30, 2017, and the related statements of operations, changes in net assets and the financial highlights for the year then ended and the financial highlights for the year ended June 30, 2013. These financial statements and financial highlights are the responsibility of the Fund's management. Our responsibility is to express an opinion on these financial statements and financial highlights based on our audit. The statement of changes in net assets for the year ended June 30, 2016 and the financial highlights for periods ended June 30, 2014, June 30, 2015 and June 30, 2016 were audited by another independent registered public accounting firm whose report, dated August 25, 2016, expressed an unqualified opinion on the statement of changes in net assets and those financial highlights. We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements and financial highlights are free of material misstatement. We were not engaged to perform an audit of the Fund's internal control over financial reporting. Our audit included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Fund's internal control over financial reporting. Accordingly, we express no such opinion. An audit also includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements and financial highlights, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. Our procedures included confirmation of securities owned as of June 30, 2017, by correspondence with the custodian, brokers and others or by other appropriate auditing procedures where replies from brokers and others were not received. We believe that our audit provides a reasonable basis for our opinion. In our opinion, the financial statements and financial highlights referred to above present fairly, in all material respects, the financial position of Pioneer Bond Fund at June 30, 2017, the results of its operations, the changes in its net assets, and the financial highlights for the year then ended and the financial highlights for the year ended June 30, 2013, in conformity with U.S. generally accepted accounting principles. /s/ Ernst & Young LLP Boston, Massachusetts August 25, 2017 122 Pioneer Bond Fund | Annual Report | 6/30/17 ADDITIONAL INFORMATION Change in Independent Registered Public Accounting Firm Prior to July 3, 2017 Pioneer Investment Management, Inc. (the "Adviser"), the Fund's investment adviser, was an indirect, wholly owned subsidiary of UniCredit S.p.A. ("UniCredit"). On that date, UniCredit completed the sale of its Pioneer Investments business, which includes the Adviser, to Amundi (the "Transaction"). As a result of the Transaction, the Adviser became an indirect, wholly-owned subsidiary of Amundi. Amundi is controlled by Credit Agricole S.A. Amundi is headquartered in Paris, France, and, as of September 30, 2016, had more than $1.1 trillion in assets under management worldwide. Deloitte & Touche LLP ("D&T"), the Fund's previous independent registered public accounting firm, informed the Audit Committee and the Board that it would no longer be independent with respect to the Fund upon the completion of the Transaction as a result of certain services being provided to Amundi and Credit Agricole, and, accordingly, that it intended to resign as the Fund's independent registered public accounting firm upon the completion of the Transaction. D&T's resignation was effective on July 3, 2017, when the Transaction was completed. During the periods as to which D&T has served as the Fund's independent registered public accounting firm, including the Fund's two most recent fiscal years preceding the fiscal year ended June 30, 2017, D&T's reports on the Fund's financial statements have not contained an adverse opinion or disclaimer of opinion and have not been qualified or modified as to uncertainty, audit scope or accounting principles. Further, there have been no disagreements with D&T on any matter of accounting principles or practices, financial statement disclosure, or auditing scope or procedure, which, if not resolved to the satisfaction of D&T, would have caused D&T to make reference to the subject matter of the disagreement in connection with its report on the financial statements. In addition, there have been no reportable events of the kind described in Item 304(a)(1)(v) of Regulation S-K under the Securities Exchange Act of 1934. Effective immediately following the completion of the Transaction on July 3, 2017, the Board, acting upon the recommendation of the Audit Committee, engaged a new independent registered public accounting firm, Ernst & Young LLP ("EY"), for the Fund's fiscal year ended June 30, 2017. Pioneer Bond Fund | Annual Report | 6/30/17 123 Prior to its engagement, EY had advised the Fund's Audit Committee that EY had identified the following matters, in each case relating to services rendered by other member firms of Ernst & Young Global Limited, all of which are located outside the United States, to UniCredit and certain of its subsidiaries during the period commencing July 1, 2016, that it determined to be inconsistent with the auditor independence rules set forth by the Securities and Exchange Commission ("SEC"): (a) project management support services to UniCredit in the Czech Republic, Germany, Italy, Serbia and Slovenia in relation to twenty-two projects, that were determined to be inconsistent with Rule 2-01(c)(4)(vi) of Regulation S-X (management functions); (b) two engagements for UniCredit in Italy where fees were contingent/success based and that were determined to be inconsistent with Rule 2-01(c)(5) of Regulation S-X (contingent fees); (c) four engagements where legal and expert services were provided to UniCredit in the Czech Republic and Germany, and twenty engagements where the legal advisory services were provided to UniCredit in Austria, Czech Republic, Italy and Poland, that were determined to be inconsistent with Rule 2-01(c)(4)(ix) and (x) of Regulation S-X (legal and expert services); and (d) two engagements for UniCredit in Italy involving assistance in the sale of certain assets, that were determined to be inconsistent with Rule 2-01(c)(4)(viii) of Regulation S-X (broker-dealer, investment advisor or investment banking services). None of the foregoing services involved the Fund, any of the other Funds in the Pioneer Family of Funds or any other Pioneer entity sold by UniCredit in the Transaction. EY advised the Audit Committee that it had considered the matters described above and had concluded that such matters would not impair EY's ability to exercise objective and impartial judgment in connection with the audits of the financial statements of the Fund under the SEC and Public Company Accounting Oversight Board independence rules, and that a reasonable investor with knowledge of all relevant facts and circumstances would reach the same conclusion. Management and the Audit Committee considered these matters and discussed the matters with EY and, based upon EY's description of the matters and statements made by EY, Management and the Audit Committee believe that EY will be capable of exercising objective and impartial judgment in connection with the audits of the financial statements of the Fund, and Management further believes that a reasonable investor with knowledge of all relevant facts and circumstances would reach the same conclusion. The percentages of the Fund's ordinary income distributions that are exempt from nonresident alien (NRA) tax withholding resulting from qualified interest income was 79.80%. 124 Pioneer Bond Fund | Annual Report | 6/30/17 Approval of New and Interim Management Agreements Amundi Pioneer Asset Management, Inc. (Amundi Pioneer), formerly Pioneer Investment Management, Inc. (PIM), serves as the investment adviser to Pioneer Bond Fund (the Fund) pursuant to an investment management agreement between Amundi Pioneer and the Fund. On July 3, 2017, Amundi acquired Pioneer Investments, a group of asset management companies located throughout the world (the "Transaction"). As a result of the Transaction, Amundi Pioneer became an indirect wholly-owned subsidiary of Amundi and Amundi's wholly-owned subsidiary, Amundi USA, Inc. Prior to July 3, 2017, Pioneer Investments was owned by Pioneer Global Asset Management S.p.A. ("PGAM"), a wholly-owned subsidiary of UniCredit S.p.A. ("UniCredit"). Under the Investment Company Act of 1940, the Fund's investment management agreement with PIM (the "Current Management Agreement") terminated automatically upon the consummation of the Transaction. In order for Amundi Pioneer to continue to manage the Fund after the consummation of the Transaction, the Trustees and shareholders of the Fund were required to approve a new investment management agreement for the Fund (the "New Management Agreement"). As discussed below, the Board of Trustees of the Fund approved the New Management Agreement at a meeting held on March 6-7, 2017. The New Management Agreement was approved by the shareholders of the Fund at a meeting held on June 13, 2017. The Board of Trustees of the Fund also approved an interim investment management agreement between Amundi Pioneer and the Fund (the "Interim Management Agreement") at the March 6-7, 2017 meeting. The Interim Management Agreement would have taken effect upon the closing of the Transaction in the event that the shareholders of the Fund did not approve the New Management Agreement. Board Evaluation of the New and Interim Management Agreements The Board evaluated the Transaction and the New Management Agreement and Interim Management Agreement for the Fund. In connection with their evaluation of the Transaction and the New Management Agreement for the Fund, the Trustees requested such information as they deemed reasonably necessary, including: (a) the structure of the Transaction and the strategy underlying the Transaction; (b) the anticipated benefits of the Transaction to the Fund and its shareholders; (c) the post-Transaction plans for Amundi Pioneer, including Amundi's plans for integration of Pioneer Investments and Amundi Pioneer with its existing asset management businesses and plans for the future development of Amundi Pioneer; (d) the effect of the Transaction on the ongoing services provided to the Fund, including the need to select a new independent registered public accounting firm for the Fund, and any plans to modify the operations of Pioneer Bond Fund | Annual Report | 6/30/17 125 the Fund; (e) the stability and continuity of Amundi Pioneer's management and key employees, including compensation and benefits to Amundi Pioneer's key employees, and retention plans and incentive plan structure; (f) the post- Transaction indebtedness and financial resources of Amundi Pioneer; (g) Amundi's legal and operational structure, its principal shareholders and senior management, its investment management, risk management, administrative, legal and compliance functions; (h) certain regulatory matters relating to Amundi's affiliates; and (i) Amundi's commitment to the United States, including the role of Amundi Pioneer in the larger Amundi business. The Trustees also requested and obtained the following information in connection with their evaluation of the Transaction and the New Management Agreement for the Fund: (i) memoranda provided by Fund counsel that summarized the legal standards and other considerations that are relevant to the Trustees in their deliberations regarding the New Management Agreement; (ii) the qualifications of the investment management teams for the Fund, as well as the level of investment by the Fund's portfolio managers in the Fund; (iii) the Fund's management fees and total expense ratios, the financial statements of Amundi Pioneer and its pre- and post-Transaction parent companies, profitability analyses from Amundi Pioneer, and analyses from Amundi Pioneer as to possible economies of scale; (iv) the profitability of the institutional business of Amundi Pioneer and Amundi Pioneer's affiliate, Amundi Pioneer Institutional Asset Management, Inc. ("Amundi Pioneer Institutional") as compared to that of Amundi Pioneer's fund management business; and (v) the differences between the fees and expenses of the Fund and the fees and expenses of Amundi Pioneer's and Amundi Pioneer Institutional's institutional accounts, as well as the different services provided by Adviser to the Fund and by Amundi Pioneer and Amundi Pioneer Institutional to the institutional accounts. In addition, the Trustees considered the information provided at regularly scheduled meetings throughout the year regarding the Fund's performance and risk attributes, including through meetings with investment management personnel, and took into account other information related to the Fund provided to the Trustees at regularly scheduled meetings. The Trustees also considered information they had received in their review of the continuance of the Current Management Agreement for the Fund in September 2016. At meetings held on January 9, 2017 and January 10, 2017, the Trustees met with representatives of Amundi and PGAM, including separate meetings of the Trustees who are not "interested persons" of the Fund Complex ("Independent Trustees") and counsel with representatives of Amundi and PGAM, and subsequently with representatives of Amundi. In those meetings, they received an extensive presentation from the representatives of Amundi, including the chief executive officer of Amundi, describing Amundi's background and history, its global asset management activities, the growth of its business, and its status as the largest asset management firm in Europe and one of the largest globally; its capital 126 Pioneer Bond Fund | Annual Report | 6/30/17 structure and financial resources, including information as to the financing of the Transaction; its principal investors, including its majority investor Credit Agricole S.A., and Credit Agricole's long-term commitment to the asset management business; the philosophy and strategy underlying the Transaction and the complementarity of Amundi's and Pioneer Investments' respective asset management businesses; Amundi's various operating and investment committees and how they would likely interact with Amundi Pioneer; the proposed integration process, including the progress to date and the establishment of various integration work streams; Amundi's plans for management of Amundi Pioneer; Amundi's philosophy as to compensation of key employees and its general intentions with respect to incentive plans for key employees of Amundi Pioneer; Amundi's preliminary plans to achieve cost and other synergies; and opportunities to further develop the business of Amundi Pioneer and Amundi Pioneer Institutional, including in the area of institutional asset management, and how that would benefit shareholders of the Pioneer Funds. In those meetings, the representatives of Amundi confirmed their intention that the Chief Executive Officer and Chief Investment Officer of Amundi Pioneer would remain in their current positions, and confirmed that they do not currently foresee major changes in the day-to-day investment management operations of Amundi Pioneer with respect to the Fund as a direct result of the Transaction. They discussed incentive arrangements for key personnel that would continue after the closing of the Transaction and their plans to establish a new long-term incentive plan following the closing. They also generally discussed ways in which Amundi Pioneer could potentially draw on the expanded global resources of Amundi post-Transaction. At those meetings, the Independent Trustees identified certain areas to which they requested further information, including as to trading and execution of securities transactions, research and portfolio management and potential changes in investment process, particularly where asset classes managed by Amundi Pioneer would overlap with asset classes managed by Amundi, the continued availability of resources currently at Pioneer Investments or elsewhere within Amundi to assist in management of certain Funds, and any anticipated significant changes in operations. The Independent Trustees considered the uncertainty as to whether the Fund's independent registered public accounting firm could continue to act in that capacity after the closing of the Transaction. The Independent Trustees also met with counsel to review the information they had received to date and to discuss next steps. Subsequently, the Trustees received further information from Amundi, including written responses to questions raised by the Independent Trustees, and received from Amundi Pioneer the information requested of it. The Independent Trustees reviewed the information provided with counsel at telephonic meetings held on February 16, 2017 and February 27, 2017. The Trustees held a special in-person Board meeting on March 6-7, 2017 for further consideration of the New Pioneer Bond Fund | Annual Report | 6/30/17 127 Management Agreements, the Interim Management Agreements and the Transaction. The Trustees met again with senior executives of Amundi at the March 6-7, 2017 meeting. At the March 6-7, 2017 meeting, based on their evaluation of the information provided by Amundi Pioneer and Amundi, the Trustees including the Independent Trustees voting separately, approved the New Management Agreement and the Interim Management Agreement for the Fund. In considering the New Management Agreement for the Fund, 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 their determinations. The Trustees considered the same factors with respect to the Interim Management Agreement for the Fund. Nature, Extent and Quality of Services. The Trustees considered the nature, extent and quality of the services that had been provided by Amundi Pioneer to the Fund and that are expected to be provided by Amundi Pioneer to the Fund following the consummation of the Transaction. The Trustees reviewed the terms of the New Management Agreement, and noted that such terms are substantially similar to the terms of the Current Management Agreement, except for different execution dates, effective dates and termination dates. The Trustees reviewed Amundi Pioneer's investment approach for the Fund and its research process. The Trustees considered the resources of Amundi Pioneer and the personnel of Amundi Pioneer who provide investment management services to the Fund. They also reviewed the amount of non-investment resources and personnel of Amundi Pioneer that are involved in Amundi Pioneer's services to the Fund, including Amundi Pioneer's compliance and legal resources and personnel. The Trustees noted the substantial attention and high priority given by Amundi Pioneer's senior management to the Pioneer Fund complex. The Trustees considered that Amundi Pioneer 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 and that Amundi Pioneer would continue to provide those investment management and research services and resources to the Fund following the consummation of the Transaction. The Trustees also considered that, as administrator, Amundi Pioneer would continue to be responsible for the administration of the Fund's business and other affairs. The Trustees considered the fees to be paid to Amundi Pioneer for the provision of administration services. The Trustees considered that Deloitte & Touche LLP informed the Board that it would no longer be independent with respect to the Fund upon the completion of the Transaction and, accordingly, that it would be necessary for the Board to engage a new independent registered public accounting firm for the Fund. 128 Pioneer Bond Fund | Annual Report | 6/30/17 The Trustees considered that the Transaction was not expected to have a material adverse impact on the nature, scope and overall quality of services provided to the Fund and its shareholders, including investment management, risk management, administrative, compliance, legal and other services, as a result of the Transaction. In that regard, the Trustees considered that Amundi is one of the largest asset managers globally, and that Amundi Pioneer may have access to additional research and portfolio management capabilities as a result of the Transaction and that Amundi Pioneer, as part of Amundi, is expected to have an enhanced global presence that may contribute to an increase in the overall scale and resources of Amundi Pioneer. Furthermore, in considering whether the Transaction would be expected to have a material adverse impact on the nature, scope and overall quality of services provided to the Fund and its shareholders, the Trustees considered the statements by representatives of Amundi that they expect the Chief Executive Officer and Chief Investment Officer of Amundi Pioneer to remain in their current positions and that they do not currently foresee major changes in the day-to-day investment management operations of Amundi Pioneer as a direct result of the Transaction, or the risk management, legal or compliance services provided by Amundi Pioneer, with respect to the Fund. They further considered the current incentive arrangements for key personnel of Amundi Pioneer that would continue after the closing of the Transaction. They also noted Amundi's stated intention to establish a new long-term incentive plan following the closing. The Trustees also took into account their experience in evaluating the proposed combination of Pioneer Investments and Santander Asset Management, which was announced in September, 2014 and abandoned in July, 2016. In light of, among other things, this experience, the Trustees determined that they were not able to identify any realistic alternatives to approving the New Management Agreement that would provide the level of services to the Fund and its shareholders that are expected to be provided by Amundi Pioneer after the closing of the Transaction. Based on these considerations, the Trustees concluded that the nature, extent and quality of services that Amundi Pioneer would continue to provide to the Fund under the New Management Agreement would be satisfactory and consistent with the terms of the New Management Agreement. Performance of the Fund. In considering the Fund's performance, the Trustees regularly reviewed and discussed throughout the year data prepared by Amundi Pioneer and information comparing the Fund's performance with the performance of its peer group of funds, as classified by each of Morningstar, Inc. (Morningstar) and Lipper, and the performance of the Fund's benchmark index. They also discussed the Fund's performance with Amundi Pioneer on a regular basis. Pioneer Bond Fund | Annual Report | 6/30/17 129 The Trustees' regular reviews and discussions were factored into the Trustees' deliberations concerning the approval of the New Management Agreement. Management Fee and Expenses. The Trustees noted that the stated management fees to be paid by the Fund are identical under the Current Management Agreement and the New Management Agreement. The Trustees considered information showing the fees and expenses of the Fund in comparison to the management fees and expense ratios of its peer group of funds as classified by Morningstar and also to the expense ratios of a peer group of funds selected on the basis of criteria determined by the Independent Trustees for this purpose using data provided by Strategic Insight Mutual Fund Research and Consulting, LLC (Strategic Insight), an independent third party. In all quintile rankings referred to below, first quintile is most favorable to the Fund's shareowners. To the extent applicable, the Trustees also considered the impact of transfer agency, sub-transfer agency, and other non- management fee expenses on the expense ratios of the Fund. The Trustees noted that they separately review the Fund's transfer agency, sub-transfer agency and intermediary arrangements and that the results of the most recent such review were considered in the consideration of the Fund's expense ratio. The Trustees considered that the Fund's management fee as of September 30, 2016 was in the second quintile relative to the management fees paid by other funds in its Morningstar category for the comparable period. The Trustees also considered the breakpoints in the management fee schedule and the reduced fee rates above certain asset levels. The Trustees considered that the expense ratio of the Fund's Class A shares as of September 30, 2016 was in the third quintile relative to its Morningstar category and in the third quintile relative to its Strategic Insight peer group, in each case for the comparable period. The Trustees considered that the expense ratio of the Fund's Class Y shares as of September 30, 2016 was in the fourth quintile relative to its Morningstar category and in the fourth quintile relative to its Strategic Insight peer group, in each case for the comparable period. The Trustees noted that Amundi Pioneer had agreed to waive fees and/or reimburse expenses in order to limit the ordinary operating expenses of the Fund. The Trustees reviewed management fees charged by Amundi Pioneer and Amundi Pioneer Institutional to institutional and other clients, including publicly offered European funds sponsored by Amundi Pioneer's affiliates, unaffiliated U.S. registered investment companies (in a sub-advisory capacity), and unaffiliated foreign and domestic separate accounts. The Trustees also considered Amundi Pioneer's costs in providing services to the Fund and Amundi Pioneer's and Amundi Pioneer Institutional's costs in providing services to the other clients and considered the differences in management fees and profit margins for fund and non-fund services. In evaluating the fees associated with Amundi Pioneer's and Amundi Pioneer Institutional's client accounts, the Trustees took into account the respective demands, resources and complexity associated with the Fund and other 130 Pioneer Bond Fund | Annual Report | 6/30/17 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 both the Current Management Agreement and the New Management Agreement, Amundi Pioneer would perform 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 risks associated with Amundi Pioneer's management of the Fund and Amundi Pioneer's and Amundi Pioneer Institutional's management of the other client accounts. The Trustees concluded that the management fee payable by the Fund to Amundi Pioneer was reasonable in relation to the nature and quality of the services to be provided by Amundi Pioneer. Profitability. The Trustees considered information provided by Amundi Pioneer regarding the profitability of Amundi Pioneer with respect to the advisory services provided by Amundi Pioneer to the Fund, including the methodology used by Amundi Pioneer in allocating certain of its costs to the management of the Fund. The Trustees also considered Amundi Pioneer's profit margin in connection with the overall operation of the Fund. They further reviewed the financial results, including the profit margins, realized by Amundi Pioneer and Amundi Pioneer Institutional from non-fund businesses. The Trustees considered Amundi Pioneer'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 Amundi Pioneer's profitability with respect to the management of the Fund was not unreasonable. Economies of Scale. The Trustees considered Amundi Pioneer'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 the Fund and Fund shareholders. The Trustees recognize that economies of scale are difficult to identify and quantify, and that, among other factors that may be relevant, are the following: fee levels, expense subsidization, investment by Amundi Pioneer in research and analytical capabilities and Amundi Pioneer's commitment and resource allocation to the Fund. The Trustees noted that profitability also may be an indicator of the availability of any economies of scale, although profitability may vary for other reasons including due to reductions in expenses. The Trustees concluded that economies of scale, if any, were being appropriately shared with the Fund. Pioneer Bond Fund | Annual Report | 6/30/17 131 Other Benefits. The Trustees considered the other benefits that Amundi Pioneer enjoys from its relationship with the Fund. The Trustees considered the character and amount of fees paid or to be paid by the Fund, other than under the Current Management Agreement or the New Management Agreement, for services provided by Amundi Pioneer and its affiliates. The Trustees further considered the revenues and profitability of Amundi Pioneer's businesses other than the Fund business. To the extent applicable, the Trustees also considered the benefits to the Fund and to Amundi Pioneer and its affiliates from the use of "soft" commission dollars generated by the Fund to pay for research and brokerage services. The Trustees considered that following the completion of the Transaction, Amundi Pioneer will be the principal U.S. asset management business of Amundi, and that Amundi's worldwide asset management business will manage over $1.38 trillion in assets (including the Pioneer Funds). This may create opportunities for Amundi Pioneer, Amundi Pioneer Institutional and Amundi that derive from Amundi Pioneer's relationships with the Fund, including Amundi's ability to market the services of Amundi Pioneer globally. The Trustees noted that Amundi Pioneer may have access to additional research capabilities as a result of the Transaction and Amundi's enhanced global presence that may contribute to an increase of the overall scale of Amundi Pioneer. The Trustees considered that Amundi Pioneer and the Fund are expected to receive reciprocal intangible benefits from the relationship, including mutual brand recognition and, for the Fund, direct and indirect access to the resources of a large global asset manager. The Trustees concluded that any such benefits received by Amundi Pioneer as a result of its relationship with the Fund were reasonable. Conclusion. After consideration of the factors described above as well as other factors, the Trustees, including the Independent Trustees, concluded that the New Management Agreement and the Interim Management Agreement for the Fund, including the fees payable thereunder, were fair and reasonable and voted to approve the New Management Agreement and the Interim Management Agreement, and to recommend that shareholders approve the New Management Agreement. 132 Pioneer Bond Fund | Annual Report | 6/30/17 Trustees, Officers and Service Providers Investment Adviser Amundi Pioneer Asset Management, Inc., formerly Pioneer Investment Management, Inc. Custodian and Sub-Administrator Brown Brothers Harriman & Co. Independent Registered Public Accounting Firm Ernst & Young LLP Principal Underwriter Amundi Pioneer Distributor, Inc., formerly Pioneer Funds Distributor, Inc. Legal Counsel Morgan, Lewis & Bockius LLP Shareowner Services and Transfer Agent Boston Financial Data Services, Inc. Proxy Voting Policies and Procedures of the Fund are available without charge, upon request, by calling our toll free number (1-800-225-6292). Information regarding how the Fund voted proxies relating to portfolio securities during the most recent 12-month period ended June 30 is publicly available to shareowners at www.amundipioneer.com. This information is also available on the Securities and Exchange Commission's web site at www.sec.gov. Trustees and Officers The Fund's Trustees and Officers are listed below, together with their principal occupations and other directorships they have held during at least the past five years. Trustees who are interested persons of the Fund within the meaning of the 1940 Act are referred to as Interested Trustees. Trustees who are not interested persons of the Fund are referred to as Independent Trustees. Each of the Trustees serves as a Trustee of each of the 46 U.S. registered investment portfolios for which Amundi Pioneer serves as investment adviser (the "Pioneer Funds"). The address for all Trustees and all officers of the Fund is 60 State Street, Boston, Massachusetts 02109. The Statement of Additional Information of the Fund includes additional information about the Trustees and is available, without charge, upon request, by calling 1-800-225-6292. Pioneer Bond Fund | Annual Report | 6/30/17 133 Independent Trustees --------------------------------------------------------------------------------------------------------------------------------- Name, Age and Term of Office and Other Directorships Position Held with the Fund Length of Service Principal Occupation Held by Trustee --------------------------------------------------------------------------------------------------------------------------------- Thomas J. Perna (66) Trustee since 2006. Private investor (2004 - 2008 and 2013 - Director, Broadridge Financial Chairman of the Board Serves until a present); Chairman (2008 - 2013) and Solutions, Inc. (investor and Trustee successor trustee is Chief Executive Officer (2008 - 2012), communications and securities elected or earlier Quadriserv, Inc. (technology products processing provider for retirement or removal. for securities lending industry); and financial services industry) Senior Executive Vice President, The (2009 - present); Director, Bank of New York (financial and Quadriserv, Inc. (2005 - securities services) (1986 - 2004) 2013); and Commissioner, New Jersey State Civil Service Commission (2011 - 2015) --------------------------------------------------------------------------------------------------------------------------------- David R. Bock (73) Trustee since 2005. Managing Partner, Federal City Capital Director of New York Mortgage Trustee Serves until a Advisors (corporate advisory services Trust (publicly-traded successor trustee is company) (1997 - 2004 and 2008 - mortgage REIT) (2004 - 2009, elected or earlier present); Interim Chief Executive 2012 - present); Director of retirement or removal. Officer, Oxford Analytica, Inc. The Swiss Helvetia Fund, Inc. (privately held research and consulting (closed-end fund) (2010 - company) (2010); Executive Vice present); Director of Oxford President and Chief Financial Officer, Analytica, Inc. (2008 - I-trax, Inc. (publicly traded health present); and Director of care services company) (2004 - 2007); Enterprise Community and Executive Vice President and Chief Investment, Inc. Financial Officer, Pedestal Inc. (privately-held affordable (internet-based mortgage trading housing finance company) (1985 company) (2000 - 2002); Private - 2010) Consultant (1995 - 1997); Managing Director, Lehman Brothers (1992 - 1995); Executive, The World Bank (1979 - 1992) --------------------------------------------------------------------------------------------------------------------------------- Benjamin M. Friedman (72) Trustee since 2008. William Joseph Maier Professor of Trustee, Mellon Institutional Trustee Serves until a Political Economy, Harvard University Funds Investment Trust and successor trustee is (1972 - present) Mellon Institutional Funds elected or earlier Master Portfolio (oversaw 17 retirement or removal. portfolios in fund complex) (1989 - 2008) --------------------------------------------------------------------------------------------------------------------------------- 134 Pioneer Bond Fund | Annual Report | 6/30/17 --------------------------------------------------------------------------------------------------------------------------------- Name, Age and Term of Office and Other Directorships Position Held with the Fund Length of Service Principal Occupation Held by Trustee --------------------------------------------------------------------------------------------------------------------------------- Margaret B.W. Graham (70) Trustee since 1996. Founding Director, Vice-President and None Trustee Serves until a Corporate Secretary, The Winthrop Group, successor trustee is Inc. (consulting firm) (1982 - present); elected or earlier Desautels Faculty of Management, McGill retirement or removal. University (1999 - present); and Manager of Research Operations and Organizational Learning, Xerox PARC, Xerox's advance research center (1990-1994) --------------------------------------------------------------------------------------------------------------------------------- Lorraine H. Monchak (61) Trustee since 2017. Chief Investment Officer, 1199 SEIU None Trustee (Advisory Trustee from Funds (healthcare workers union pension 2014 - 2017) Serves funds) (2001 - present); Vice President until a successor - International Investments Group, trustee is elected or American International Group, Inc. earlier retirement or (insurance company) (1993 - 2001); Vice removal. President Corporate Finance and Treasury Group, Citibank, N.A.(1980 - 1986 and 1990 - 1993); Vice President - Asset/Liability Management Group, Federal Farm Funding Corporation (government-sponsored issuer of debt securities) (1988 - 1990); Mortgage Strategies Group, Shearson Lehman Hutton, Inc. (investment bank) (1987 - 1988); Mortgage Strategies Group, Drexel Burnham Lambert, Ltd. (investment bank) (1986 - 1987) --------------------------------------------------------------------------------------------------------------------------------- Marguerite A. Piret (69) Trustee since 1996. President and Chief Executive Officer, Director of New America High Trustee Serves until a Newbury Piret Company (investment Income Fund, Inc. (closed-end successor trustee is banking firm) (1981 - present) investment company) (2004 - elected or earlier present); and Member, Board of retirement or removal. Governors, Investment Company Institute (2000 - 2006) --------------------------------------------------------------------------------------------------------------------------------- Fred J. Ricciardi (70) Trustee since 2014. Consultant (investment company services) None Trustee Serves until a (2012 - present); Executive Vice successor trustee is President, BNY Mellon (financial and elected or earlier investment company services) (1969 - retirement or removal. 2012); Director, BNY International Financing Corp. (financial services) (2002 - 2012); Director, Mellon Overseas Investment Corp. (financial services) (2009 - 2012) --------------------------------------------------------------------------------------------------------------------------------- Pioneer Bond Fund | Annual Report | 6/30/17 135 Interested Trustee --------------------------------------------------------------------------------------------------------------------------------- Name, Age and Term of Office and Other Directorships Position Held with the Fund Length of Service Principal Occupation Held by Trustee --------------------------------------------------------------------------------------------------------------------------------- Lisa M. Jones (55)* Trustee since 2017. Chair, Director, CEO and President of None Trustee, President and Chief Serves until a Amundi Pioneer Asset Management USA, Executive Officer successor trustee is Inc. (since September 2014); Chair, elected or earlier Director and CEO of Amundi Pioneer Asset retirement or removal Management, Inc. (since September 2014); Chair, Director and CEO of Amundi Pioneer Distributor, Inc. (since September 2014); Chair, Director, CEO and President of Amundi Pioneer Institutional Asset Management, Inc. (since September 2014); Managing Director, Morgan Stanley Investment Management (2010 - 2013); Director of Institutional Business, CEO of International, Eaton Vance Management (2005 - 2010) --------------------------------------------------------------------------------------------------------------------------------- Kenneth J. Taubes (59)* Trustee since 2014. Director and Executive Vice President None Trustee Serves until a (since 2008) and Chief Investment successor trustee is Officer, U.S. (since 2010) of Amundi elected or earlier Pioneer Asset Management USA, Inc.; retirement or removal Executive Vice President and Chief Investment Officer, U.S. of Amundi Pioneer (since 2008); Executive Vice President of Amundi Pioneer Institutional Asset Management, Inc. (since 2009); Portfolio Manager of Amundi Pioneer (since 1999) --------------------------------------------------------------------------------------------------------------------------------- * Ms. Jones and Mr. Taubes are Interested Trustees because they are officers or directors of the fund's investment adviser and certain of its affiliates. 136 Pioneer Bond Fund | Annual Report | 6/30/17 Fund Officers --------------------------------------------------------------------------------------------------------------------------------- Name, Age and Term of Office and Other Directorships Position Held with the Fund Length of Service Principal Occupation Held by Officer --------------------------------------------------------------------------------------------------------------------------------- Christopher J. Kelley (52) Since 2010. Vice President and Associate General None Secretary and Chief Serves at the Counsel of Amundi Pioneer since January Legal Officer discretion of the 2008; Secretary and Chief Legal Officer Board of all of the Pioneer Funds since June 2010; Assistant Secretary of all of the Pioneer Funds from September 2003 to May 2010; Vice President and Senior Counsel of Amundi Pioneer from July 2002 to December 2007 --------------------------------------------------------------------------------------------------------------------------------- Carol B. Hannigan (56) Since 2010. Fund Governance Director of Amundi None Assistant Secretary Serves at the Pioneer since December 2006 and discretion of the Assistant Secretary of all the Pioneer Board Funds since June 2010; Manager - Fund Governance of Amundi Pioneer from December 2003 to November 2006; and Senior Paralegal of Amundi Pioneer from January 2000 to November 2003 --------------------------------------------------------------------------------------------------------------------------------- Thomas Reyes (54) Since 2010. Senior Counsel of Amundi Pioneer since None Assistant Secretary Serves at the May 2013 and Assistant Secretary of all discretion of the the Pioneer Funds since June 2010; Board Counsel of Amundi Pioneer from June 2007 to May 2013 --------------------------------------------------------------------------------------------------------------------------------- Mark E. Bradley (57) Since 2008. Vice President - Fund Treasury of Amundi None Treasurer and Chief Serves at the Pioneer; Treasurer of all of the Pioneer Financial and Accounting discretion of the Funds since March 2008; Deputy Treasurer Officer Board of Amundi Pioneer from March 2004 to February 2008; and Assistant Treasurer of all of the Pioneer Funds from March 2004 to February 2008 --------------------------------------------------------------------------------------------------------------------------------- Luis I. Presutti (52) Since 2000. Director - Fund Treasury of Amundi None Assistant Treasurer Serves at the Pioneer; and Assistant Treasurer of all discretion of the of the Pioneer Funds Board --------------------------------------------------------------------------------------------------------------------------------- Pioneer Bond Fund | Annual Report | 6/30/17 137 Fund Officers (continued) --------------------------------------------------------------------------------------------------------------------------------- Name, Age and Term of Office and Other Directorships Position Held with the Fund Length of Service Principal Occupation Held by Officer --------------------------------------------------------------------------------------------------------------------------------- Gary Sullivan (59) Since 2002. Fund Accounting Manager - Fund Treasury None Assistant Treasurer Serves at the of Amundi Pioneer; and Assistant discretion of the Treasurer of all of the Pioneer Funds Board --------------------------------------------------------------------------------------------------------------------------------- David F. Johnson (37) Since 2009. Fund Administration Manager - Fund None Assistant Treasurer Serves at the Treasury of Amundi Pioneer since discretion of the November 2008; Assistant Treasurer of Board all of the Pioneer Funds since January 2009; Client Service Manager - Institutional Investor Services at State Street Bank from March 2003 to March 2007 --------------------------------------------------------------------------------------------------------------------------------- Jean M. Bradley (64) Since 2010. Chief Compliance Officer of Amundi None Chief Compliance Officer Serves at the Pioneer and of all the Pioneer Funds discretion of the since March 2010; Chief Compliance Board Officer of Amundi Pioneer Institutional Asset Management, Inc. since January 2012; Chief Compliance Officer of Vanderbilt Capital Advisors, LLC since July 2012: Director of Adviser and Portfolio Compliance at Amundi Pioneer since October 2005; Senior Compliance Officer for Columbia Management Advisers, Inc. from October 2003 to October 2005 --------------------------------------------------------------------------------------------------------------------------------- Kelly O'Donnell (46) Since 2006. Director - Transfer Agency Compliance of None Anti-Money Serves at the Amundi Pioneer and Anti-Money Laundering Laundering Officer discretion of the Officer of all the Pioneer Funds since Board 2006 --------------------------------------------------------------------------------------------------------------------------------- 138 Pioneer Bond Fund | Annual Report | 6/30/17 This page is for your notes. Pioneer Bond Fund | Annual Report | 6/30/17 139 This page is for your notes. 140 Pioneer Bond Fund | Annual Report | 6/30/17 How to Contact Amundi 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: -------------------------------------------------------------------------------- Amundi Pioneer P.O. Box 55014 Boston, Massachusetts 02205-5014 Our toll-free fax 1-800-225-4240 Our internet e-mail address ask.amundipioneer@amundipioneer.com (for general questions about Amundi Pioneer only) Visit our web site: www.amundipioneer.com This report must be preceded or accompanied by a prospectus. The Fund files a complete schedule of investments with the Securities and Exchange Commission for the first and third quarters for each fiscal year on Form N-Q. Shareholders may view the filed Form N-Q by visiting the Commission's web site at http://www.sec.gov. The filed form may also be viewed and copied at the Commission's Public Reference Room in Washington, DC. Information regarding the operations of the Public Reference Room may be obtained by calling 1-800-SEC-0330. [LOGO] Amundi Pioneer ============== ASSET MANAGEMENT Amundi Pioneer Asset Management, Inc. 60 State Street Boston, MA 02109 www.amundipioneer.com Securities offered through Amundi Pioneer Distributor, Inc. 60 State Street, Boston, MA 02109 Underwriter of Pioneer Mutual Funds, Member SIPC (C) 2017 Amundi Pioneer Asset Management 19398-11-0817 ITEM 2. CODE OF ETHICS. (a) Disclose whether, as of the end of the period covered by the report, the registrant has adopted a code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party. If the registrant has not adopted such a code of ethics, explain why it has not done so. The registrant has adopted, as of the end of the period covered by this report, a code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer and controller. (b) For purposes of this Item, the term "code of ethics" means written standards that are reasonably designed to deter wrongdoing and to promote: (1) Honest and ethical conduct, including the ethical handling of actual or apparent conflicts of interest between personal and professional relationships; (2) Full, fair, accurate, timely, and understandable disclosure in reports and documents that a registrant files with, or submits to, the Commission and in other public communications made by the registrant; (3) Compliance with applicable governmental laws, rules, and regulations; (4) The prompt internal reporting of violations of the code to an appropriate person or persons identified in the code; and (5) Accountability for adherence to the code. (c) The registrant must briefly describe the nature of any amendment, during the period covered by the report, to a provision of its code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party, and that relates to any element of the code of ethics definition enumerated in paragraph (b) of this Item. The registrant must file a copy of any such amendment as an exhibit pursuant to Item 10(a), unless the registrant has elected to satisfy paragraph (f) of this Item by posting its code of ethics on its website pursuant to paragraph (f)(2) of this Item, or by undertaking to provide its code of ethics to any person without charge, upon request, pursuant to paragraph (f)(3) of this Item. The registrant has made no amendments to the code of ethics during the period covered by this report. (d) If the registrant has, during the period covered by the report, granted a waiver, including an implicit waiver, from a provision of the code of ethics to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party, that relates to one or more of the items set forth in paragraph (b) of this Item, the registrant must briefly describe the nature of the waiver, the name of the person to whom the waiver was granted, and the date of the waiver. Not applicable. (e) If the registrant intends to satisfy the disclosure requirement under paragraph (c) or (d) of this Item regarding an amendment to, or a waiver from, a provision of its code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions and that relates to any element of the code of ethics definition enumerated in paragraph (b) of this Item by posting such information on its Internet website, disclose the registrant's Internet address and such intention. Not applicable. (f) The registrant must: (1) File with the Commission, pursuant to Item 12(a)(1), a copy of its code of ethics that applies to the registrant's principal executive officer,principal financial officer, principal accounting officer or controller, or persons performing similar functions, as an exhibit to its annual report on this Form N-CSR (see attachment); (2) Post the text of such code of ethics on its Internet website and disclose, in its most recent report on this Form N-CSR, its Internet address and the fact that it has posted such code of ethics on its Internet website; or (3) Undertake in its most recent report on this Form N-CSR to provide to any person without charge, upon request, a copy of such code of ethics and explain the manner in which such request may be made. 	See Item 10(2) ITEM 3. AUDIT COMMITTEE FINANCIAL EXPERT. (a) (1) Disclose that the registrant's board of trustees has determined that the registrant either: (i) Has at least one audit committee financial expert serving on its audit committee; or (ii) Does not have an audit committee financial expert serving on its audit committee. The registrant's Board of Trustees has determined that the registrant has at least one audit committee financial expert. (2) If the registrant provides the disclosure required by paragraph (a)(1)(i) of this Item, it must disclose the name of the audit committee financial expert and whether that person is "independent." In order to be considered "independent" for purposes of this Item, a member of an audit committee may not, other than in his or her capacity as a member of the audit committee, the board of trustees, or any other board committee: (i) Accept directly or indirectly any consulting, advisory, or other compensatory fee from the issuer; or (ii) Be an "interested person" of the investment company as defined in Section 2(a)(19) of the Act (15 U.S.C. 80a-2(a)(19)). Ms. Marguerite A. Piret, an independent trustee, is such an audit committee financial expert. (3) If the registrant provides the disclosure required by paragraph (a)(1) (ii) of this Item, it must explain why it does not have an audit committee financial expert. Not applicable. ITEM 4. PRINCIPAL ACCOUNTANT FEES AND SERVICES. (a) Disclose, under the caption AUDIT FEES, the aggregate fees billed for each of the last two fiscal years for professional services rendered by the principal accountant for the audit of the registrant's annual financial statements or services that are normally provided by the accountant in connection with statutory and regulatory filings or engagements for those fiscal years. The audit fees for the Fund were $45,000 payable to Ernst & Young LLP for the year ended June 30, 2017 and $62,185 to Deloitte & Touche LLP for the year ended June 30, 2016. (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. There were no audit-related services in 2017 or 2016. (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. The tax fees for the Fund were $10,115 payable to Ernst & Young LLP for the year ended June 30, 2017 and $8,778 to Deloitte & Touche LLP for the year ended June 30, 2016. (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. There were no other fees in 2017 or 2016. (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. Non-Audit Services Beginning with non-audit service contracts entered into on or after May 6, 2003, the effective date of the new SEC pre-approval rules, the Fund's audit committee is required to pre-approve services to affiliates defined by SEC rules to the extent that the services are determined to have a direct impact on the operations or financial reporting of the Fund. For the years ended June 30 2017 and 2016, there were no services provided to an affiliate that required the Fund's audit committee pre-approval. (f) If greater than 50 percent, disclose the percentage of hours expended on the principal accountants engagement to audit the registrant's financial statements for the most recent fiscal year that were attributed to work performed by persons other than the principal accountant's full-time, permanent employees. N/A (g) Disclose the aggregate non-audit fees billed by the registrants accountant for services rendered to the registrant, and rendered to the registrants investment adviser (not including any sub-adviser whose role is primarily portfolio management and is subcontracted with or overseen by another investment adviser), and any entity controlling, controlled by, or under common control with the adviser that provides ongoing services to the registrant for each of the last two fiscal years of the registrant. The aggregate non-audit fees for the Fund were $10,155 payable to Ernst & Young LLP for the year ended June 30, 2017 and $8,778 to Deloitte & Touche LLP for the year ended June 30, 2016. (h) Disclose whether the registrants audit committee of the board of trustees has considered whether the provision of non-audit services that were rendered to the registrants investment adviser (not including any subadviser whose role is primarily portfolio management and is subcontracted with or overseen by another investment adviser), and any entity controlling, controlled by, or under common control with the investment adviser that provides ongoing services to the registrant that were not pre-approved pursuant to paragraph (c)(7)(ii) of Rule 2-01 of Regulation S-X is compatible with maintaining the principal accountant's independence. The Fund's audit committee of the Board of Trustees has considered whether the provision of non-audit services that were rendered to the Affiliates (as defined) that were not pre- approved pursuant to paragraph (c)(7)(ii) of Rule 2-01 of Regulation S-X is compatible with maintaining the principal accountant's independence. ITEM 5. AUDIT COMMITTEE OF LISTED REGISTRANTS (a) If the registrant is a listed issuer as defined in Rule 10A-3 under the Exchange Act (17 CFR 240.10A-3), state whether or not the registrant has a separately-designated standing audit committee established in accordance with Section 3(a)(58)(A) of the Exchange Act (15 U.S.C. 78c(a)(58)(A)). If the registrant has such a committee, however designated, identify each committee member. If the entire board of directors is acting as the registrant's audit committee as specified in Section 3(a)(58)(B) of the Exchange Act (15 U.S.C. 78c(a)(58)(B)), so state. N/A (b) If applicable, provide the disclosure required by Rule 10A-3(d) under the Exchange Act (17 CFR 240.10A-3(d)) regarding an exemption from the listing standards for audit committees. N/A ITEM 6. SCHEDULE OF INVESTMENTS. File Schedule of Investments in securities of unaffiliated issuers as of the close of the reporting period as set forth in 210.1212 of Regulation S-X [17 CFR 210.12-12], unless the schedule is included as part of the report to shareholders filed under Item 1 of this Form. Included in Item 1 ITEM 7. DISCLOSURE OF PROXY VOTING POLICIES AND PROCEDURES FOR CLOSED-END MANAGEMENT INVESTMENT COMPANIES. A closed-end management investment company that is filing an annual report on this Form N-CSR must, unless it invests exclusively in non-voting securities, describe the policies and procedures that it uses to determine how to vote proxies relating to portfolio securities, including the procedures that the company uses when a vote presents a conflict between the interests of its shareholders, on the one hand, and those of the company's investment adviser; principal underwriter; or any affiliated person (as defined in Section 2(a)(3) of the Investment Company Act of 1940 (15 U.S.C. 80a-2(a)(3)) and the rules thereunder) of the company, its investment adviser, or its principal underwriter, on the other. Include any policies and procedures of the company's investment adviser, or any other third party, that the company uses, or that are used on the company's behalf, to determine how to vote proxies relating to portfolio securities. Not applicable to open-end management investment companies. ITEM 8. PORTFOLIO MANAGERS OF CLOSED-END MANAGEMENT INVESTMENT COMPANIES. (a) If the registrant is a closed-end management investment company that is filing an annual report on this Form N-CSR,provide the following information: (1) State the name, title, and length of service of the person or persons employed by or associated with the registrant or an investment adviser of the registrant who are primarily responsible for the day-to-day management of the registrant's portfolio ("Portfolio Manager"). Also state each Portfolio Manager's business experience during the past 5 years. Not applicable to open-end management investment companies. ITEM 9. PURCHASES OF EQUITY SECURITIES BY CLOSED-END MANAGEMENT INVESTMENT COMPANY AND AFFILIATED PURCHASERS. (a) If the registrant is a closed-end management investment company, in the following tabular format, provide the information specified in paragraph (b) of this Item with respect to any purchase made by or on behalf of the registrant or any affiliated purchaser, as defined in Rule 10b-18(a)(3) under the Exchange Act (17 CFR 240.10b-18(a)(3)), of shares or other units of any class of the registrant's equity securities that is registered by the registrant pursuant to Section 12 of the Exchange Act (15 U.S.C. 781). Not applicable to open-end management investment companies. ITEM 10. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS. Describe any material changes to the procedures by which shareholders may recommend nominees to the registrant's board of directors, where those changes were implemented after the registrant last provided disclosure in response to the requirements of Item 407(c)(2)(iv) of Regulation S-R(17 CFR 229.407)(as required by Item 22(b)(15)) of Schedule 14A (17 CFR 240.14a-101), or this Item. There have been no material changes to the procedures by which the shareholders may recommend nominees to the registrant's board of directors since the registrant last provided disclosure in response to the requirements of Item 407(c)(2)(iv) of Regulation S-R of Schedule 14(A) in its definitive proxy statement, or this item. ITEM 11. CONTROLS AND PROCEDURES. (a) Disclose the conclusions of the registrant's principal executive and principal financials officers, or persons performing similar functions, regarding the effectiveness of the registrant's disclosure controls and procedures (as defined in Rule 30a-3(c) under the Act (17 CFR 270.30a-3(c))) as of a date within 90 days of the filing date of the report that includes the disclosure required by this paragraph, based on the evaluation of these controls and procedures required by Rule 30a-3(b) under the Act (17 CFR 270.30(a)-3(b) and Rules 13a-15(b) or 15d-15(b) under the Exchange Act (17 CFR 240.13a-15(b) or 240.15d-15(b)). The registrant's principal executive officer and principal financial officer have concluded that the registrant's disclosure controls and procedures are effective based on the evaluation of these controls and procedures as of a date within 90 days of the filing date of this report. (b) Disclose any change in the registrant's internal control over financial reporting (as defined in Rule 30a-3(d) under the Act (17CFR 270.30a-3(d)) that occured during the second fiscal quarter of the period covered by this report that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting. There were no significant changes in the registrant's internal control over financial reporting that occurred during the second fiscal quarter of the period covered by this report that have materially affected, or are reasonably likely to materially affect, the registrant's internal control over financial reporting. The registrant's principal executive officer and principal financial officer, however, voluntarily are reporting the following information: In August of 2006 the registrant's investment adviser enhanced its internal procedures for reporting performance information required to be included in prospectuses. Those enhancements involved additional internal controls over the appropriateness of performance data generated for this purpose. Such enhancements were made following an internal review which identified prospectuses relating to certain classes of shares of a limited number of registrants where, inadvertently, performance information not reflecting the deduction of applicable sales charges was included. Those prospectuses were revised, and the revised prospectuses were distributed to shareholders. ITEM 12. EXHIBITS. (a) File the exhibits listed below as part of this Form. Letter or number the exhibits in the sequence indicated. (1) Any code of ethics, or amendment thereto, that is the subject of the disclosure required by Item 2, to the extent that the registrant intends to satisfy the Item 2 requirements through filing of an exhibit. (2) A separate certification for each principal executive officer and principal financial officer of the registrant as required by Rule 30a-2(a) under the Act (17 CFR 270.30a-2(a)) , exactly as set forth below: Filed herewith. SIGNATURES [See General Instruction F] Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. (Registrant) Pioneer Bond Fund By (Signature and Title)* /s/ Lisa M. Jones Lisa M. Jones, President & Chief Executive Officer Date August 29, 2017 Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. By (Signature and Title)* /s/ Lisa M. Jones Lisa M. Jones, President & Chief Executive Officer Date August 29, 2017 By (Signature and Title)* /s/ Mark E. Bradley Mark E. Bradley, Treasurer & Chief Accounting & Financial Officer Date August 29, 2017 * Print the name and title of each signing officer under his or her signature.