OMB APPROVAL OMB Number: 3235-0570 Expires: January 31, 2017 Estimated average burden hours per response.....20.6 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, 2013 through June 30, 2014 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, 2014 -------------------------------------------------------------------------------- Ticker Symbols: Class A PIOBX Class B PBOBX Class C PCYBX Class K PBFKX Class R PBFRX Class Y PICYX Class Z PIBZX [LOGO] PIONEER Investments(R) visit us: us.pioneerinvestments.com Table of Contents Letter to Shareowners 2 Portfolio Management Discussion 4 Portfolio Summary 10 Prices and Distributions 11 Performance Update 12 Comparing Ongoing Fund Expenses 19 Schedule of Investments 21 Financial Statements 69 Notes to Financial Statements 80 Report of Independent Registered Public Accounting Firm 92 Trustees, Officers and Service Providers 94 Pioneer Bond Fund | Annual Report | 6/30/14 1 President's Letter Dear Shareowner, As we move past the midway point of 2014, U.S. economic growth is still expected to exceed 2% for the full calendar year, despite the fact that U.S. gross domestic product (GDP) for the first quarter was revised down to -2.9% in May. The markets, in fact, almost completely ignored that bad news, as more timely data -- especially labor market data -- pointed to continuing economic strength. By mid-year, the number of people filing initial unemployment claims and the number of job openings were at levels last seen during the boom years of 2005 through 2007, and unemployment was down to just over 6%. Barring an external shock, we think it's likely that the domestic economic expansion will continue. The Federal Reserve System (the Fed) is widely expected to end its stimulative QE (quantitative easing) program by the end of this year and to begin raising the Federal funds rate in 2015; two more signs that the U.S. economic recovery is on increasingly solid footing. The timing and pace of Fed's actions remain uncertain, however, as Fed Chair Janet Yellen has continually stressed that Fed policy will be sensitive to incoming economic data, and any signs of accelerating inflation could prompt an earlier increase in the Federal funds rate. A modestly improving European economy and continuing economic improvement in Japan appear likely to result in improving global economic growth in the second half of 2014, further supporting the U.S. economy. Some slack remains in the labor markets and capacity utilization, which offers the potential for continuing non-inflationary growth. While the U.S. economy appears robust and the global economy seems to be improving, there are still weaknesses and risks to the economic outlook. Risks of an adverse shock also remain. Military conflicts and political tensions are widespread, with particular concerns about recent developments in the Middle East that could prove disruptive to the global oil supply. While most of the widely recognized risks may already be "priced into" the market, we caution against complacency and believe investors should continue to expect market volatility. 2 Pioneer Bond Fund | Annual Report | 6/30/14 At Pioneer, we have long advocated the benefits of staying diversified and investing for the long term. And while diversification does not assure a profit or protect against loss in a declining market, we believe there are still opportunities for prudent investors to earn attractive returns. Our advice, as always, is to work closely with a trusted financial advisor to discuss your goals and work together to develop an investment strategy that meets your individual needs, keeping in mind that there is no single best strategy that works for every investor. Pioneer's investment teams have, since 1928, sought out attractive opportunities in equity and bond markets, using in-depth research to identify undervalued individual securities, and using thoughtful risk management to construct portfolios which seek to balance potential risks and rewards in an ever-changing world. We encourage you to learn more about Pioneer and our time-tested approach to investing by consulting with your financial advisor or visiting us online at us.pioneerinvestments.com. We greatly appreciate your trust in us, and we thank you for investing with Pioneer. Sincerely, /s/ Daniel K. Kingsbury Daniel K. Kingsbury* President and CEO Pioneer Investment Management USA, Inc. Any information in this shareowner report regarding market or economic trends or the factors influencing the Fund's historical or future performance are statements of opinion as of the date of this report. These statements should not be relied upon for any other purposes. Past performance is no guarantee of future results, and there is no guarantee that market forecasts discussed will be realized. * Mr. Kingsbury resigned effective August 8, 2014. Pioneer Bond Fund | Annual Report | 6/30/14 3 Portfolio Management Discussion | 6/30/14 Fixed-income investments turned in positive performance during the 12-month period ended June 30, 2014, especially during the second half of the period as market volatility declined, helping both the credit-sensitive and government sectors. In the following interview, Kenneth J. Taubes and Charles Melchreit review the factors that affected the performance of Pioneer Bond Fund during the 12-month period ended June 30, 2014. Mr. Taubes, Chief Investment Officer, U.S., and a portfolio manager at Pioneer Investments, is responsible for the daily management of the Fund, along with Charles Melchreit, a senior vice president and a portfolio manager at Pioneer. Q How did the Fund perform during the 12-month period ended June 30, 2014? A Pioneer Bond Fund's Class A shares returned 6.19% at net asset value during the 12-month period ended June 30, 2014, while the Fund's benchmark, the Barclays Aggregate Bond Index (the Barclays Index), returned 4.37%. During the same period, the average return of the 51 mutual funds in Lipper's Corporate Debt A-rated Funds category was 6.50%, and the average return of the 1,057 mutual funds in Morningstar's Intermediate-Term Bond Funds category was 5.07%. Q How would you describe the investment environment in the fixed-income markets during the 12-month period ended June 30, 2014? A The overall environment for investing in the bond markets during the period was supportive. This was especially true during the second half of the 12-month period when yields of longer-maturity Treasuries declined, leading to healthy returns for government securities at the same time that credit-sensitive sectors rallied as investors grew more confident about the domestic economic outlook. Early in the 12-month period, Treasury rates had risen, eroding returns of all fixed-income asset classes as concerns arose about the effects of the potential removal from the economy of some of the Federal Reserve's (the Fed's) monetary stimulus. Those worries abated later in the period, however, as the Fed made it clear that it would keep short- term interest rates low and would only gradually taper its quantitative easing (QE) program of monthly bond purchases. Market volatility, which had unsettled investors early in the period, declined substantially as the period progressed, leading to healthy returns throughout the fixed-income markets, especially among the more credit-sensitive issues, which outperformed Treasuries. 4 Pioneer Bond Fund | Annual Report | 6/30/14 As the period progressed, investors grew more confident that economies in the United States and Europe would continue to slowly improve, helped by accommodative monetary policies from central banks like the Fed and the European Central Bank (ECB). Although U.S. gross domestic product (GDP) growth for the first quarter was disappointing (-2.9%), investors focused on more encouraging economic indicators, including job growth, industrial production, and the recovering housing market. In addition, government fiscal policies - including spending cuts and tax hikes - that restrained growth during 2013 seemed less likely to drag on the economy in 2014. The capital markets also demonstrated their resiliency in the face of a succession of problems overseas, ranging from slowing economic growth in China, turmoil in the Middle East, and heightened tensions between Russia and the Ukraine. In the U.S, the Fed began tapering QE midway through the period by reducing its monthly bond purchases, and planned to complete the program by the end of 2014. At the same time, with little evidence of rising inflationary pressures, the Fed kept short-term interest rates at exceptionally low levels. In Europe, economies continued to improve slowly, led by growth in Germany and some gains in the peripheral European Union (E.U.) economies, where problems had been the most severe. The ECB maintained accommodative policies designed to keep European banks liquid and able to lend. In Asia, the new government in China appeared determined not to allow economic growth to slow by too much, while Japan continued to push forward with monetary and fiscal stimulus programs designed to encourage economic expansion and curb the nation's deflation problem. Emerging economies that are highly dependent on growth in China did feel pressure, but even the performance of emerging markets debt recovered during the period as many governments moved aggressively to control inflation. In that environment, riskier, credit-sensitive securities outperformed the overall fixed-income market, with high-yield and investment-grade corporate bonds producing solid returns. Bank loans, asset-backed debt and convertible securities also performed well. Meanwhile, after rising earlier in the period, longer-term Treasury yields declined over the final few months, leading to price appreciation for most longer-maturity Treasury and government securities, although Treasuries lagged the credit sectors in performance. The yield curve - which reflects the difference in yields of fixed-income securities with longer and shorter maturities - flattened somewhat as longer-maturity Treasury rates declined and shorter-maturity yields rose slightly. The rally in longer-maturity Treasuries towards the latter Pioneer Bond Fund | Annual Report | 6/30/14 5 part of the period was somewhat of a surprise to the markets, but increased geopolitical risks and fears about inflation pressures encouraged investments in Treasuries, which are still considered by many as the safest investment haven during "risk-averse" periods. In addition, the yield advantage that 10-year Treasuries offered over sovereign-debt rates in other economies encouraged some speculation in Treasuries. Q How did you position the Fund's portfolio during the 12-month period ended June 30, 2014? A We maintained a consistent emphasis on the credit-sensitive sectors in the Fund's portfolio during the 12-month period, which helped to drive the Fund's outperformance of the benchmark Barclays Index. We maintained overweighted portfolio positions in credit-sensitive debt, with healthy exposures to investment-grade corporate bonds, non-agency mortgages and commercial mortgage-backed securities, asset-backed debt and bank loans. At the same time, we underweighted the Fund in Treasuries and government mortgages, although we added to existing positions in government agency mortgages as the period progressed when we began paring back the portfolio's credit-sensitive positions. We did become somewhat more cautious about higher valuations as the period wore on, and so we sold some credit-sensitive securities that might become more difficult to trade should market volatility increase. We raised the overall credit quality of the Fund's portfolio during the period as we reduced exposure to high-yield and investment-grade corporate bonds as well as bank loans. Nevertheless, at the end of the period, the Fund remained overweight in the credit-sensitive sectors and underweight in government mortgages. Throughout the 12-month period, we maintained a shorter-than-benchmark duration positioning in the portfolio. {Duration is measure of the sensitivity of the price (the value of principal) of a fixed-income investment to a change in interest rates, expressed as a number of years.} The short duration position had a modest, negative effect on the Fund's benchmark-relative performance in the second half of the period when Treasuries rallied. Despite that development, we kept the portfolio's shorter-duration positioning intact, particularly as the flattening of the yield curve over the second half of the period increased the interest-rate risks of longer-duration portfolios. At the end of the 12-month period on June 30, 2014, the Fund's exposure to the credit-sensitive sectors was led by U.S. investment-grade corporate bonds, which also represented the largest overall portfolio allocation. Government agency mortgages and non-agency mortgage-backed debt, respectively, were the second- and third-largest allocations in the portfolio as of period end. The effective duration of the portfolio on June 30, 2014, was 4.06 years. 6 Pioneer Bond Fund | Annual Report | 6/30/14 Q Which of your investment strategies or individual investments had the biggest effect on the Fund's performance during the 12-month period end June 30, 2014, either from a positive or negative standpoint? A As noted previously, the main driver of the Fund's outperformance relative to the Barclays Index during the period was the overweight in the credit-sensitive sectors, while the corresponding underweighting of Treasuries also helped. The Fund's exposure to some higher-coupon Fannie Mae mortgages was another positive performance contributor, as those securities gained in value when interest rates declined over the second half of the period and mortgage prepayments remained low. In addition, the Fund's investments in securities issued by financial companies helped, as did investments in municipal bonds and convertible bonds. Two notable outperformers in the portfolio during the 12-month period were securities issued by private equity companies KKR and the Carlyle Group. A noteworthy factor detracting from the Fund's benchmark-relative performance during the period was the portfolio's more than 4.5% allocation to cash on June 30, 2014. Also holding back results somewhat were the portfolio's investments in some lower-coupon government agency mortgages and a security issued by investment bank Goldman Sachs. As noted previously, the portfolio's shorter-than-benchmark duration positioning also held back the Fund's results when Treasury yields rallied later in the period. The negative effects of the Fund's short-duration positioning were partially offset by good positioning on the yield curve; specifically, the Fund's exposures to 30-year and 10-year bonds. Q Did you invest the Fund in derivative securities during the 12-month period ended June 30, 2014? A We did invest in Treasury futures to manage the portfolio's interest-rate sensitivity and yield-curve positioning. Because the futures were part of our strategy to maintain a lower-than-benchmark duration position, they tended to hold back the Fund's results when interest rates declined during the second half of the period. Q What is your investment outlook and how have you positioned the Fund's portfolio in accordance with that outlook? A We believe the fundamental strengths in the credit sectors remain solid, given the prospect of continuing economic growth and the general health of corporate balance sheets. We are generally positive about the investment outlook. We anticipate that the Fed will continue to gradually lessen its accommodative monetary policy as the economy grows, and we think credit-sensitive securities have the potential to continue to perform well. At the same time, we do not anticipate robust performance from any particular fixed-income asset class, Pioneer Bond Fund | Annual Report | 6/30/14 7 as the gradual increase of short-term Treasury yields to normal levels and the resulting increase in market interest rates should have a modest negative effect on most bond prices. As noted previously, we have maintained an overweight to credit in the Fund, even though we have reduced exposure in light of the higher valuations of some corporate debt; and we have increased the portfolio's investments in government agency mortgages, which have less credit risk. Despite the increased allocation, government mortgages remained an underweight relative to the Barclays Index at period end. In light of the flattening of the yield curve (reflecting the narrowing differences between yields of shorter and longer-maturity securities), we have reduced the Fund's duration by reducing exposures to the 10-year and 30-year parts of the curve. Given the possibility of increases in short-term interest rates, we see some value in floating-rate debt and have retained the portfolio's allocations to bank loans and event-linked (catastrophe) bonds. As we have modestly reduced exposure to the credit sectors, we have improved the overall credit quality of the portfolio's assets. 8 Pioneer Bond Fund | Annual Report | 6/30/14 Please refer to the Schedule of Investments on pages 21-68 for a full listing of Fund securities. When interest rates rise, the prices of fixed-income securities in the Fund will generally fall. Conversely, when interest rates fall, the prices of fixed-income securities in the Fund will generally rise. Investments in the Fund are subject to possible loss due to the financial failure of 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. Past performance is no guarantee of future results, and there is no guarantee that market forecasts discussed will be realized. Any information in this shareholder report regarding market or economic trends or the factors influencing the Fund's historical or future performance are statements of opinion as of the date of this report. These opinions should not be relied upon for any other purposes. Pioneer Bond Fund | Annual Report | 6/30/14 9 Portfolio Summary | 6/30/14 Portfolio Diversification -------------------------------------------------------------------------------- (As a percentage of total investment portfolio) [THE FOLLOWING DATA WAS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL] U.S. Corporate Bonds 34.5% U.S. Government Securities 25.1% Collateralized Mortgage Obligations 18.0% Asset Backed Securities 6.7% Municipal Bonds 4.3% Senior Secured Loans 4.1% Temporary Cash Investments 3.9% U.S. Preferred Stocks 2.6% Convertible Corporate Bonds 0.4% Convertible Preferred Stocks 0.4% International Corporate Bonds 0.0%+ Warrants 0.0%+ International Preferred Stocks 0.0%+ + Amount rounds to less than 0.1% Portfolio Quality -------------------------------------------------------------------------------- (As a percentage of total investment portfolio) [THE FOLLOWING DATA WAS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL] AAA 33.9% AA 5.5% A 15.7% BBB 27.0% BB 8.4% B 3.8% CCC 0.4% Not Rated 1.6% Cash Equivalent 3.7% Due to rounding, figures may not total 100%. Credit rating breakdown reflects the average of available ratings across Moody's, Standard & Poor's (S&P) and Fitch. Bond ratings are ordered highest to lowest in portfolio. Based on S&P's measures, AAA (highest possible rating) through BBB are considered investment grade. BB or lower ratings are considered non-investment grade. Cash equivalents and some bonds may not be rated. 10 Largest Holdings -------------------------------------------------------------------------------- (As a percentage of total long-term holdings)* 1. Fannie Mae, 30YR Pool 5.0%, TBA 1.99% -------------------------------------------------------------------------------- 2. Fannie Mae, 3.0%, 8/1/42 1.35 -------------------------------------------------------------------------------- 3. Fannie Mae, 3.5%, 2/1/44 1.11 -------------------------------------------------------------------------------- 4. Fannie Mae, 30YR Pool, 4.5%, TBA 0.97 -------------------------------------------------------------------------------- 5. Government National Mortgage Association I, 4.0%, 7/21/14 0.96 -------------------------------------------------------------------------------- 6. Fannie Mae, 4.0%, 2/1/42 0.82 -------------------------------------------------------------------------------- 7. Fannie Mae, 4.5%, 1/1/42 0.80 -------------------------------------------------------------------------------- 8. U.S. Treasury Bonds, 4.5%, 8/15/39 0.66 -------------------------------------------------------------------------------- 9. Fannie Mae, 4.5%, 1/1/42 0.62 -------------------------------------------------------------------------------- 10. JP Morgan Mortgage Trust 2014-2, Floating Rate Note, 6/25/29 (144A) 0.61 -------------------------------------------------------------------------------- * This list excludes temporary cash investments and derivative instruments. The Fund is actively managed, and current holdings may be different. The holdings listed should not be considered recommendations to buy or sell any security listed. 10 Pioneer Bond Fund | Annual Report | 6/30/14 Prices and Distributions | 6/30/14 Net Asset Value per Share -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Class 6/30/14 6/30/13 -------------------------------------------------------------------------------- A $9.88 $9.67 -------------------------------------------------------------------------------- B $9.82 $9.61 -------------------------------------------------------------------------------- C $9.77 $9.57 -------------------------------------------------------------------------------- K $9.87 $9.67 -------------------------------------------------------------------------------- R $9.97 $9.76 -------------------------------------------------------------------------------- Y $9.79 $9.58 -------------------------------------------------------------------------------- Z $9.90 $9.70 -------------------------------------------------------------------------------- Distributions per Share: 7/1/13-6/30/14 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Net Investment Short-Term Long-Term Class Income Capital Gains Capital Gains -------------------------------------------------------------------------------- A $0.3755 $ -- $ -- -------------------------------------------------------------------------------- B $0.2723 $ -- $ -- -------------------------------------------------------------------------------- C $0.2880 $ -- $ -- -------------------------------------------------------------------------------- K $0.4014 $ -- $ -- -------------------------------------------------------------------------------- R $0.3394 $ -- $ -- -------------------------------------------------------------------------------- Y $0.3900 $ -- $ -- -------------------------------------------------------------------------------- Z $0.3959 $ -- $ -- -------------------------------------------------------------------------------- Index Definition -------------------------------------------------------------------------------- The Barclays 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 12-18. Pioneer Bond Fund | Annual Report | 6/30/14 11 Performance Update | 6/30/14 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 Barclays Aggregate Bond Index. Average Annual Total Returns (As of June 30, 2014) -------------------------------------------------------------------------------- Net Public Barclays Asset Offering Aggregate Value Price Bond Period (NAV) (POP) Index -------------------------------------------------------------------------------- 10 Years 5.74% 5.26% 4.93% 5 Years 7.35 6.36 4.85 1 Year 6.19 1.37 4.37 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated November 1, 2013) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 1.01% 0.85% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Bond Fund Barclays Aggregate Bond Index 6/30/2004 $ 9,550 $ 10,000 6/30/2005 $ 10,283 $ 10,680 6/30/2006 $ 10,155 $ 10,594 6/30/2007 $ 10,694 $ 11,243 6/30/2008 $ 11,404 $ 12,043 6/30/2009 $ 11,706 $ 12,772 6/30/2010 $ 13,428 $ 13,985 6/30/2011 $ 14,378 $ 14,530 6/30/2012 $ 15,228 $ 15,616 6/30/2013 $ 15,716 $ 15,509 6/30/2014 $ 16,690 $ 16,187 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. NAV results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. POP returns reflect deduction of maximum 4.50% sales charge. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The net expense ratio reflects the contractual expense limitation currently in effect through November 1, 2015, for Class A shares. There can be no assurance that Pioneer will extend the expense limitation beyond such time. Please see the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. 12 Pioneer Bond Fund | Annual Report | 6/30/14 Performance Update | 6/30/14 Class B Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Class B shares of Pioneer Bond Fund during the periods shown, compared to that of the Barclays Aggregate Bond Index. Average Annual Total Returns (As of June 30, 2014) -------------------------------------------------------------------------------- Barclays Aggregate If If Bond Period Held Redeemed Index -------------------------------------------------------------------------------- 10 Years 4.70% 4.70% 4.93% 5 Years 6.24 6.24 4.85 1 Year 5.11 1.11 4.37 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated November 1, 2013) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 2.05% 1.90% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Bond Fund Barclays Aggregate Bond Index 6/30/2004 $ 10,000 $ 10,000 6/30/2005 $ 10,672 $ 10,680 6/30/2006 $ 10,443 $ 10,594 6/30/2007 $ 10,888 $ 11,243 6/30/2008 $ 11,508 $ 12,043 6/30/2009 $ 11,695 $ 12,772 6/30/2010 $ 13,270 $ 13,985 6/30/2011 $ 14,065 $ 14,530 6/30/2012 $ 14,742 $ 15,616 6/30/2013 $ 15,059 $ 15,509 6/30/2014 $ 15,828 $ 16,187 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. "If Held" results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. "If Redeemed" returns reflect the deduction of applicable contingent deferred sales charge (CDSC). The maximum CDSC for Class B shares is 4% and declines over five years. For more complete information, please see the prospectus. 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. Please see the prospectus and financial statements for more information. The net expense ratio reflects the contractual expense limitation currently in effect through November 1, 2015, for Class B shares. There can be no assurance that Pioneer will extend the expense limitation beyond such time. Please see the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. Pioneer Bond Fund | Annual Report | 6/30/14 13 Performance Update | 6/30/14 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 Barclays Aggregate Bond Index. Average Annual Total Returns (As of June 30, 2014) -------------------------------------------------------------------------------- Barclays Aggregate If If Bond Period Held Redeemed Index -------------------------------------------------------------------------------- 10 Years 4.80% 4.80% 4.93% 5 Years 6.40 6.40 4.85 1 Year 5.20 5.20 4.37 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated November 1, 2013) -------------------------------------------------------------------------------- Gross -------------------------------------------------------------------------------- 1.72% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Bond Fund Barclays Aggregate Bond Index 6/30/2004 $ 10,000 $ 10,000 6/30/2005 $ 10,668 $ 10,680 6/30/2006 $ 10,446 $ 10,594 6/30/2007 $ 10,904 $ 11,243 6/30/2008 $ 11,536 $ 12,043 6/30/2009 $ 11,723 $ 12,772 6/30/2010 $ 13,321 $ 13,985 6/30/2011 $ 14,128 $ 14,530 6/30/2012 $ 14,852 $ 15,616 6/30/2013 $ 15,198 $ 15,509 6/30/2014 $ 15,988 $ 16,187 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Class C shares held for less than one year are also subject to a 1% contingent deferred sales charge (CDSC). If 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. 14 Pioneer Bond Fund | Annual Report | 6/30/14 Performance Update | 6/30/14 Class K Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Class K shares of Pioneer Bond Fund during the periods shown, compared to that of the Barclays Aggregate Bond Index. Average Annual Total Returns (As of June 30, 2014) -------------------------------------------------------------------------------- Barclays Aggregate If If Bond Period Held Redeemed Index -------------------------------------------------------------------------------- 10 Years 5.77% 5.77% 4.93% 5 Years 7.42 7.42 4.85 1 Year 6.37 6.37 4.37 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated November 1, 2013) -------------------------------------------------------------------------------- Gross -------------------------------------------------------------------------------- 0.57% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Bond Fund Barclays Aggregate Bond Index 6/30/2004 $ 10,000 $ 10,000 6/30/2005 $ 10,765 $ 10,680 6/30/2006 $ 10,631 $ 10,594 6/30/2007 $ 11,195 $ 11,243 6/30/2008 $ 11,938 $ 12,043 6/30/2009 $ 12,254 $ 12,772 6/30/2010 $ 14,057 $ 13,985 6/30/2011 $ 15,052 $ 14,530 6/30/2012 $ 15,941 $ 15,616 6/30/2013 $ 16,480 $ 15,509 6/30/2014 $ 17,530 $ 16,187 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. The performance shown for Class K shares for the period prior to the commencement of operations of Class K shares on December 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. Pioneer Bond Fund | Annual Report | 6/30/14 15 Performance Update | 6/30/14 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 Barclays Aggregate Bond Index. Average Annual Total Returns (As of June 30, 2014) -------------------------------------------------------------------------------- Barclays Aggregate If If Bond Period Held Redeemed Index -------------------------------------------------------------------------------- 10 Years 5.37% 5.37% 4.93% 5 Years 6.93 6.93 4.85 1 Year 5.75 5.75 4.37 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated November 1, 2013) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 1.35% 1.25% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Bond Fund Barclays Aggregate Bond Index 6/30/2004 $ 10,000 $ 10,000 6/30/2005 $ 10,727 $ 10,680 6/30/2006 $ 10,574 $ 10,594 6/30/2007 $ 11,107 $ 11,243 6/30/2008 $ 11,790 $ 12,043 6/30/2009 $ 12,067 $ 12,772 6/30/2010 $ 13,778 $ 13,985 6/30/2011 $ 14,697 $ 14,530 6/30/2012 $ 15,517 $ 15,616 6/30/2013 $ 15,952 $ 15,509 6/30/2014 $ 16,868 $ 16,187 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Class 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, 2015, for Class R shares. There can be no assurance that Pioneer will extend the expense limitation beyond such time. Please see the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. 16 Pioneer Bond Fund | Annual Report | 6/30/14 Performance Update | 6/30/14 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 Barclays Aggregate Bond Index. Average Annual Total Returns (As of June 30, 2014) -------------------------------------------------------------------------------- Barclays Aggregate If If Bond Period Held Redeemed Index -------------------------------------------------------------------------------- 10 Years 6.04% 6.04% 4.93% 5 Years 7.60 7.60 4.85 1 Year 6.41 6.41 4.37 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated November 1, 2013) -------------------------------------------------------------------------------- Gross -------------------------------------------------------------------------------- 0.66% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $5 Million Investment Pioneer Bond Fund Barclays Aggregate Bond Index 6/30/2004 $ 5,000,000 $ 5,000,000 6/30/2005 $ 5,403,376 $ 5,340,077 6/30/2006 $ 5,361,447 $ 5,297,067 6/30/2007 $ 5,664,518 $ 5,621,284 6/30/2008 $ 6,056,149 $ 6,021,696 6/30/2009 $ 6,234,801 $ 6,385,821 6/30/2010 $ 7,173,731 $ 6,992,365 6/30/2011 $ 7,693,870 $ 7,265,168 6/30/2012 $ 8,176,485 $ 7,808,145 6/30/2013 $ 8,449,298 $ 7,754,446 6/30/2014 $ 8,991,086 $ 8,093,575 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Class Y shares are not subject to sales charges and are available for limited groups of eligible investors, including institutional investors. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. Pioneer Bond Fund | Annual Report | 6/30/14 17 Performance Update | 6/30/14 Class Z Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Class Z shares of Pioneer Bond Fund during the periods shown, compared to that of the Barclays Aggregate Bond Index. Average Annual Total Returns (As of June 30, 2014) -------------------------------------------------------------------------------- Barclays Aggregate If If Bond Period Held Redeemed Index -------------------------------------------------------------------------------- 10 Years 5.94% 5.94% 4.93% 5 Years 7.52 7.52 4.85 1 Year 6.29 6.29 4.37 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated November 1, 2013) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 0.87% 0.65% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Bond Fund Barclays Aggregate Bond Index 6/30/2004 $ 10,000 $ 10,000 6/30/2005 $ 10,765 $ 10,680 6/30/2006 $ 10,631 $ 10,594 6/30/2007 $ 11,195 $ 11,243 6/30/2008 $ 11,979 $ 12,043 6/30/2009 $ 12,389 $ 12,772 6/30/2010 $ 14,207 $ 13,985 6/30/2011 $ 15,244 $ 14,530 6/30/2012 $ 16,193 $ 15,616 6/30/2013 $ 16,746 $ 15,509 6/30/2014 $ 17,799 $ 16,187 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Performance shown for periods prior to the inception of Class Z shares on July 6, 2007, reflects the NAV performance of the Fund's Class A shares. The performance does not reflect differences in expenses, including the Rule 12b-1 fees applicable to Class A shares. Since fees for Class A shares are generally higher than those of Class Z shares, the performance for Class Z shares prior to their inception on July 6, 2007 would have been higher than that shown. Class Z 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, 2015, for Class Z shares. There can be no assurance that Pioneer will extend the expense limitation beyond such time. Please see the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. 18 Pioneer Bond Fund | Annual Report | 6/30/14 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, 2014 through June 30, 2014. ----------------------------------------------------------------------------------------------------------------- Share Class A B C K R Y Z ----------------------------------------------------------------------------------------------------------------- Beginning $1,000.00 $1,000.00 $1,000.00 $1,000.00 $1,000.00 $1,000.00 $1,000.00 Account Value on 1/1/14 ----------------------------------------------------------------------------------------------------------------- Ending Account $1,061.90 $1,051.10 $1,052.00 $1,063.70 $1,057.50 $1,064.10 $1,062.90 Value (after expenses) on 6/30/14 ----------------------------------------------------------------------------------------------------------------- Expenses Paid $ 4.31 $ 9.62 $ 8.76 $ 2.84 $ 6.34 $ 3.35 $ 3.30 During Period* ----------------------------------------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized net expense ratio of 0.85%, 1.90%, 1.73%, 0.56%, 1.25%, 0.66%, and 0.65% for Class A, Class B, Class C, Class K, Class R, Class Y, and Class Z 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 | 6/30/14 19 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, 2014 through June 30, 2014. -------------------------------------------------------------------------------------------------------------------- Share Class A B C K R Y Z -------------------------------------------------------------------------------------------------------------------- Beginning $1,000.00 $1,000.00 $1,000.00 $1,000.00 $1,000.00 $1,000.00 $1,000.00 Account Value on 1/1/14 -------------------------------------------------------------------------------------------------------------------- Ending Account $1,020.58 $1,015.37 $1,016.22 $1,022.02 $1,018.60 $1,021.52 $1,021.57 Value (after expenses) on 6/30/14 -------------------------------------------------------------------------------------------------------------------- Expenses Paid $ 4.26 $ 9.49 $ 8.65 $ 2.81 $ 6.26 $ 3.31 $ 3.26 During Period* -------------------------------------------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized net expense ratio of 0.85%, 1.90%, 1.73%, 0.56%, 1.25%, 0.66%, and 0.65% for Class A, Class B, Class C, Class K, Class R, Class Y, and Class Z shares, respectively, multiplied by the average account value over the period, multiplied by 181/365 (to reflect the one-half year period). 20 Pioneer Bond Fund | Annual Report | 6/30/14 Schedule of Investments | 6/30/14 ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- CONVERTIBLE CORPORATE BOND -- 0.3% SEMICONDUCTORS & SEMICONDUCTOR EQUIPMENT -- 0.3% Semiconductors -- 0.3% 4,725,000 A-/NR Intel Corp., 2.95%, 12/15/35 $ 5,873,766 ---------------------------------------------------------------------------------------------------- TOTAL CONVERTIBLE CORPORATE BOND (Cost $4,777,007) $ 5,873,766 ---------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------- Shares ---------------------------------------------------------------------------------------------------- PREFERRED STOCKS -- 2.5% BANKS -- 0.8% Diversified Banks -- 0.5% 64,000 6.50 A-/Baa1 US Bancorp, Floating Rate Note (Perpetual) $ 1,808,640 235,000 6.00 A-/Baa1 US Bancorp, Floating Rate Note (Perpetual) 6,441,350 -------------- $ 8,249,990 ---------------------------------------------------------------------------------------------------- Regional Banks -- 0.3% 85,000 BBB/Baa2 BB&T Corp., 5.625% (Perpetual) $ 2,017,900 28,000 6.25 A-/NR CoBank ACB, Floating Rate Note (Perpetual) (144A) 2,914,626 43,050 6.62 BBB-/Ba1 Fifth Third Bancorp, Floating Rate Note (Perpetual) 1,152,879 -------------- $ 6,085,405 -------------- Total Banks $ 14,335,395 ---------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 0.9% Other Diversified Financial Services -- 0.5% 116,000 7.88 BB+/Ba2 Citigroup Capital XIII, Floating Rate Note, 10/30/40 $ 3,213,200 197,000 7.12 BB+/B1 Citigroup, Inc., Floating Rate Note (Perpetual) 5,446,853 -------------- $ 8,660,053 ---------------------------------------------------------------------------------------------------- Specialized Finance -- 0.3% 167,900 5.75 BBB-/Baa1 SCE Trust III, Floating Rate Note (Perpetual) $ 4,432,560 ---------------------------------------------------------------------------------------------------- Asset Management & Custody Banks -- 0.1% 54,200 5.90 BBB+/Baa2 State Street Corp., Floating Rate Note, 12/31/73 $ 1,420,040 -------------- Total Diversified Financials $ 14,512,653 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/14 21 Schedule of Investments | 6/30/14 (continued) ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Rate (b) Ratings Shares (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- INSURANCE -- 0.6% Life & Health Insurance -- 0.2% 153,800 7.38 BBB-/NR Delphi Financial Group, Inc., Floating Rate Note, 5/15/37 $ 3,782,526 ---------------------------------------------------------------------------------------------------- Property & Casualty Insurance -- 0.3% 50,000 5.95 BBB-/Ba1 Aspen Insurance Holdings, Ltd., Floating Rate Note (Perpetual) $ 1,245,000 147,475 5.10 BBB/Baa1 The Allstate Corp., Floating Rate Note, 1/15/53 3,706,047 -------------- $ 4,951,047 ---------------------------------------------------------------------------------------------------- Reinsurance -- 0.1% 420,899 0.00 NR/NR Altair Re, Floating Rate Note, 4/30/16 (Cat Bond) $ 528,102 1,500,000 0.00 NR/NR Altair Re, Floating Rate Note, 6/30/16 (Cat Bond) 1,552,950 -------------- $ 2,081,052 -------------- Total Insurance $ 10,814,625 ---------------------------------------------------------------------------------------------------- UTILITIES -- 0.2% Electric Utilities -- 0.2% 164,000 BB+/Ba1 PPL Capital Funding, Inc., 5.9%, 4/30/73 $ 4,022,920 -------------- Total Utilities $ 4,022,920 ---------------------------------------------------------------------------------------------------- TOTAL PREFERRED STOCKS (Cost $42,030,874) $ 43,685,593 ---------------------------------------------------------------------------------------------------- CONVERTIBLE PREFERRED STOCK -- 0.4% BANKS -- 0.4% Diversified Banks -- 0.4% 5,610 BBB+/Baa3 Wells Fargo & Co., 7.5% (Perpetual) $ 6,810,540 ---------------------------------------------------------------------------------------------------- TOTAL CONVERTIBLE PREFERRED STOCK (Cost $5,839,986) $ 6,810,540 ---------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------- Principal Amount ($) ---------------------------------------------------------------------------------------------------- ASSET BACKED SECURITIES -- 6.6% CONSUMER SERVICES -- 0.2% Hotels, Resorts & Cruise Lines -- 0.2% 1,007,221 A/NR Westgate Resorts 2012-2 LLC, 3.0%, 1/20/25 (144A) $ 1,014,473 1,316,718 NR/NR Westgate Resorts 2012-A LLC, 2.25%, 8/20/25 (144A) 1,318,430 The accompanying notes are an integral part of these financial statements. 22 Pioneer Bond Fund | Annual Report | 6/30/14 ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- Hotels, Resorts & Cruise Lines -- (continued) 1,333,177 NR/NR Westgate Resorts 2012-A LLC, 3.75%, 8/20/25 (144A) $ 1,350,532 287,425 A/NR Westgate Resorts LLC, 2.5%, 3/20/25 (144A) 288,776 -------------- $ 3,972,211 -------------- Total Consumer Services $ 3,972,211 ---------------------------------------------------------------------------------------------------- FOOD & STAPLES RETAILING -- 0.2% Food Retail -- 0.2% 3,850,425 BBB-/NR CKE Restaurant Holdings, Inc., 4.474%, 3/20/43 (144A) $ 3,954,829 -------------- Total Food & Staples Retailing $ 3,954,829 ---------------------------------------------------------------------------------------------------- HEALTH CARE EQUIPMENT & SERVICES -- 0.1% Health Care Distributors -- 0.1% 750,000 3.08 BBB/NR Drug Royalty II LP 2, Floating Rate Note, 7/15/23 (144A) $ 751,875 -------------- Total Health Care Equipment & Services $ 751,875 ---------------------------------------------------------------------------------------------------- BANKS -- 4.4% Thrifts & Mortgage Finance -- 4.4% 477,901 6.50 BB+/Baa2 ACE Securities Corp., Manufactured Housing Trust Series 2003-MH1, Floating Rate Note, 8/15/30 (144A) $ 478,201 1,172,150 6.50 BBB+/A2 ACE Securities Corp., Manufactured Housing Trust Series 2003-MH1, Floating Rate Note, 8/15/30 (144A) 1,217,276 1,507,004 0.42 BB+/Baa3 Aegis Asset Backed Securities Trust 2005-5, Floating Rate Note, 12/25/35 1,421,186 400,000 0.65 A+/Baa1 Bayview Financial Mortgage Pass-Through Trust 2005-C, Floating Rate Note, 6/28/44 385,176 1,462,628 AAA/Aaa Bayview Financial Mortgage Pass-Through Trust 2006-A, 5.865%, 2/28/41 (Step) 1,504,974 1,486,142 0.60 AA/Aa2 Bayview Financial Mortgage Pass-Through Trust Series 2005-B, Floating Rate Note, 4/28/39 1,462,456 394,270 NR/A1 BCMSC Trust 1998-A, 6.65%, 4/15/28 398,056 248,137 A/NR Beacon Container Finance LLC, 3.72%, 9/20/27 (144A) 253,345 2,032,518 0.65 A+/Ba1 Bear Stearns Asset Backed Securities I Trust 2005-FR1, Floating Rate Note, 6/25/35 1,993,569 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/14 23 Schedule of Investments | 6/30/14 (continued) ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 1,186,828 0.64 A+/NR Bear Stearns Asset Backed Securities Trust 2006-SD2, Floating Rate Note, 6/25/36 $ 1,164,917 227,143 0.89 AA/Baa3 Carrington Mortgage Loan Trust Series 2005-NC1, Floating Rate Note, 2/25/35 226,884 116,322 0.55 AA+/A1 Carrington Mortgage Loan Trust Series 2005-NC4, Floating Rate Note, 9/25/35 114,826 400,000 1.35 NR/A2 Chesapeake Funding LLC, Floating Rate Note, 3/4/26 400,000 400,000 1.30 NR/Aa2 Chesapeake Funding LLC, Floating Rate Note, 5/7/24 (144A) 403,056 1,989,023 BB-/Ba2 Citicorp Residential Mortgage Trust Series 2006-1, 5.939%, 7/25/36 (Step) 2,072,562 318,208 B+/B2 Citicorp Residential Mortgage Trust Series 2006-2, 5.775%, 9/25/36 (Step) 334,907 2,119,177 B-/B1 Citicorp Residential Mortgage Trust Series 2006-3, 5.703%, 11/25/36 (Step) 2,225,793 1,337,905 B-/B2 Citicorp Residential Mortgage Trust Series 2007-1, 5.892%, 3/25/37 (Step) 1,407,288 81,525 0.42 AA+/A1 Citigroup Mortgage Loan Trust 2006-HE1, Floating Rate Note, 1/25/36 81,271 892,044 4.00 AA/NR Citigroup Mortgage Loan Trust 2014-A, Floating Rate Note, 1/1/35 (144A) 928,658 971,453 1.20 BBB-/Ba1 Countrywide Asset-Backed Certificates, Floating Rate Note, 12/25/34 965,204 1,935,480 5.07 BB+/Ba2 Countrywide Asset-Backed Certificates, Floating Rate Note, 2/25/36 1,972,196 700,000 NR/Ba2 Credit-Based Asset Servicing and Securitization LLC, 5.6472%, 10/25/36 (Step) (144A) 683,536 1,526,250 A/NR Cronos Containers Program, Ltd., 3.81%, 9/18/27 (144A) 1,533,901 63,788 1.23 AAA/NR First Franklin Mortgage Loan Trust 2004-FF10, Floating Rate Note, 9/25/34 63,692 464,835 AAA/NR First Investors Auto Owner Trust 2012-2, 1.47%, 5/15/18 (144A) 466,870 2,079,856 0.55 AA+/Aa2 First NLC Trust 2005-2, Floating Rate Note, 9/25/35 2,064,457 The accompanying notes are an integral part of these financial statements. 24 Pioneer Bond Fund | Annual Report | 6/30/14 ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 1,434,803 NR/NR GMAT 2013-1 Trust, 3.9669%, 8/25/53 (Step) $ 1,437,505 851,740 0.40 B+/B3 GSAA Home Equity Trust 2005-11, Floating Rate Note, 10/25/35 847,825 595,875 0.90 AA+/Ba1 GSAMP Trust 2005-HE1, Floating Rate Note, 12/25/34 582,393 1,561,584 1.50 BBB+/Baa3 GSRPM Mortgage Loan Trust 2003-2, Floating Rate Note, 6/25/33 1,498,042 968,273 0.45 A+/Baa1 GSRPM Mortgage Loan Trust 2006-2, Floating Rate Note, 9/25/36 (144A) 913,308 1,620,000 AA/NR HLSS Servicer Advance Receivables Trust, 1.7436%, 1/16/46 (144A) 1,616,274 224,000 A/NR HLSS Servicer Advance Receivables Trust, 3.96%, 10/15/45 (144A) 228,032 424,845 0.53 A+/A2 Home Equity Asset Trust 2005-7, Floating Rate Note, 1/25/36 410,642 2,185,612 NR/A2 Horizon Funding Trust 2013-1, 3.0%, 5/15/18 (144A) 2,191,076 1,444,152 1.35 A+/Aa2 HSBC Home Equity Loan Trust USA 2007-3, Floating Rate Note, 11/20/36 1,445,376 1,269,288 BBB/NR Icon Brands Holdings LLC, 4.229%, 1/25/43 (144A) 1,281,180 730,047 NR/Baa1 Irwin Home Equity Loan Trust 2005-1, 5.32%, 6/25/35 (Step) 716,159 381,350 0.85 AA+/A2 Irwin Whole Loan Home Equity Trust 2005-C, Floating Rate Note, 3/25/25 370,337 1,326,000 NR/Aaa Leaf Receivables Funding 8 LLC, 1.55%, 11/15/17 (144A) 1,333,890 2,203,000 NR/Aaa Leaf Receivables Funding 8 LLC, 1.92%, 9/15/20 (144A) 2,212,275 365,672 BBB+/Baa1 Lehman ABS Manufactured Housing Contract Trust 2001-B, 5.873%, 4/15/40 385,515 1,862,749 0.40 A+/Aa1 Lehman Brothers Small Balance Commercial, Floating Rate Note, 2/25/30 (144A) 1,653,961 1,182,900 2.40 A+/A3 Madison Avenue Manufactured Housing Contract Trust 2002-A, Floating Rate Note, 3/25/32 1,182,196 386,807 0.30 B-/B3 Nationstar Home Equity Loan Trust 2007-A, Floating Rate Note, 3/25/37 367,087 908,073 0.85 AAA/Aaa New Century Home Equity Loan Trust 2005-1, Floating Rate Note, 3/25/35 907,561 1,900,000 3.75 AAA/NR New Residential Mortgage Loan Trust 2014-1, Floating Rate Note, 1/25/54 (144A) 1,965,789 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/14 25 Schedule of Investments | 6/30/14 (continued) ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 608,424 5.91 AA/A3 Origen Manufactured Housing Contract Trust 2004-A, Floating Rate Note, 1/15/35 $ 644,710 424,412 5.46 AAA/Aa3 Origen Manufactured Housing Contract Trust 2004-B, Floating Rate Note, 11/15/35 436,679 103,571 NR/A2 Oxford Finance Funding Trust 2012-1, 3.9%, 3/15/17 (144A) 104,218 526,376 0.85 AAA/Aaa PFS Financing Corp., Floating Rate Note, 10/17/16 (144A) 526,631 775,712 1.65 A/NR PFS Financing Corp., Floating Rate Note, 10/17/16 (144A) 776,608 1,500,000 NR/NR Progreso Receivables Funding I LLC, 4.0%, 7/9/18 (144A) 1,505,625 1,163,424 0.40 B/Baa2 RAAC Series 2006-RP2 Trust, Floating Rate Note, 2/25/37 (144A) 1,129,487 953,717 2.63 A+/Ba2 SASCO Mortgage Pass-Through Certificates Series 2004-S4, Floating Rate Note, 12/25/34 953,042 633,359 AAA/NR SNAAC Auto Receivables Trust 2013-1, 1.14%, 7/16/18 (144A) 634,058 705,164 AAA/NR SNAAC Auto Receivables Trust, 3.11%, 6/15/17 (144A) 707,548 267,979 A+/NR Spirit Master Funding LLC, 5.74%, 3/20/42 (144A) 295,782 2,800,000 A/NR Springleaf Funding Trust 2013-A, 2.58%, 9/15/21 (144A) 2,820,518 1,200,000 A/NR Springleaf Funding Trust 2014-A, 2.41%, 12/25/22 (144A) 1,202,118 294,179 A+/NR STORE Master Funding LLC, 4.16%, 3/20/43 (144A) 299,521 2,042,044 A+/NR STORE Master Funding LLC, 5.77%, 8/20/42 (144A) 2,212,207 1,498,466 0.35 CCC/Ba3 Structured Asset Investment Loan Trust 2006-1, Floating Rate Note, 1/25/36 1,452,845 2,642,984 0.37 B-/Baa3 Structured Asset Securities Corp., Mortgage Loan Trust 2006-GEL4, Floating Rate Note, 10/25/36 (144A) 2,562,392 231,652 A+/Baa2 Structured Asset Securities Corp., 4.77%, 10/25/34 (Step) 240,901 702,068 A+/NR SVO 2012-A VOI Mortgage LLC, 2.0%, 9/20/29 (144A) 704,518 771,441 1.09 AA+/A1 Terwin Mortgage Trust Series TMTS 2003-8HE, Floating Rate Note, 12/25/34 748,592 The accompanying notes are an integral part of these financial statements. 26 Pioneer Bond Fund | Annual Report | 6/30/14 ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 2,830,743 AA/A2 Terwin Mortgage Trust Series TMTS 2005-16HE, 4.60715%, 9/25/36 (Step) $ 2,950,294 3,134,000 2.55 AAA/Aaa Trafigura Securitisation Finance Plc, Floating Rate Note, 10/15/15 (144A) 3,166,731 -------------- $ 75,845,705 -------------- Total Banks $ 75,845,705 ---------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 1.7% Other Diversified Financial Services -- 0.6% 1,900,000 AA/Aa3 Capital Auto Receivables Asset Trust/ Ally, 1.74%, 10/22/18 $ 1,903,435 1,800,000 2.10 NR/A2 Colony American Homes 2014-1, Floating Rate Note, 5/17/31 1,801,062 739,675 AA/NR Mid-State Capital Trust 2010-1, 5.25%, 12/15/45 (144A) 767,197 1,605,513 A+/NR Sierra Timeshare 2012-2 Receivables Funding LLC, 2.38%, 3/20/29 (144A) 1,630,632 308,042 A+/NR Sierra Timeshare 2012-3 Receivables Funding LLC, 1.87%, 8/20/29 (144A) 310,696 3,503,940 NR/NR TOPRE 13-LTR, 3.47%, 11/20/28 (144A) 3,507,780 765,000 1.85 B/B2 Truman Capital Mortgage Loan Trust, Floating Rate Note, 1/25/34 752,208 -------------- $ 10,673,010 ---------------------------------------------------------------------------------------------------- Specialized Finance -- 0.4% 3,914,279 BBB+/Baa1 Domino's Pizza Master Issuer LLC, 5.216%, 1/25/42 (144A) $ 4,206,370 1,659,000 0.59 NR/Aaa GE Dealer Floorplan Master Note Trust, Floating Rate Note, 10/20/17 1,662,695 233,996 NR/A2 Hercules Capital Funding Trust 2012-1, 3.32%, 12/16/17 (144A) 234,874 750,878 NR/Aaa JG Wentworth XXII LLC, 3.82%, 12/15/48 (144A) 792,884 -------------- $ 6,896,823 ---------------------------------------------------------------------------------------------------- Consumer Finance -- 0.6% 428,000 BBB+/NR American Credit Acceptance Receivables Trust 2012-2, 4.05%, 2/15/18 (144A) $ 435,122 580,162 A+/NR American Credit Acceptance Receivables Trust, 1.64%, 11/15/16 (144A) 581,340 600,000 1.60 NR/Aa2 American Homes 4 Rent 2014-SFR1, Floating Rate Note, 6/17/31 600,115 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/14 27 Schedule of Investments | 6/30/14 (continued) ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- Consumer Finance -- (continued) 500,000 NR/Aaa AmeriCredit Automobile Receivables Trust 2011-3, 4.04%, 7/10/17 $ 517,592 800,000 A+/NR AmeriCredit Automobile Receivables Trust 2013-1, 1.57%, 1/8/19 803,173 792,411 NR/Aaa California Republic Auto Receivables Trust 2012-1, 1.18%, 8/15/17 (144A) 796,404 1,200,000 A+/NR First Investors Auto Owner Trust 2013-1, 2.02%, 1/15/19 (144A) 1,202,574 808,333 A/NR Global SC Finance II SRL, 4.11%, 7/19/27 (144A) 811,365 666,677 AA+/NR Prestige Auto Receivables Trust 2011-1, 3.9%, 7/16/18 (144A) 672,861 134,300 NR/Aaa Santander Drive Auto Receivables Trust 2011-2, 2.66%, 1/15/16 134,427 1,450,000 AA/Aaa Santander Drive Auto Receivables Trust 2012-1, 3.78%, 11/15/17 1,488,526 850,000 A/Aaa Santander Drive Auto Receivables Trust 2012-5, 2.7%, 8/15/18 873,751 900,000 0.98 AAA/Aa1 SLM Student Loan Trust 2004-10, Floating Rate Note, 4/27/26 (144A) 907,084 -------------- $ 9,824,334 ---------------------------------------------------------------------------------------------------- Asset Management & Custody Banks -- 0.1% 1,021,250 A/NR Triton Container Finance LLC, 4.21%, 5/14/27 (144A) $ 1,021,250 -------------- Total Diversified Financials $ 28,415,417 ---------------------------------------------------------------------------------------------------- TOTAL ASSET BACKED SECURITIES (Cost $111,203,007) $ 112,940,037 ---------------------------------------------------------------------------------------------------- COLLATERALIZED MORTGAGE OBLIGATIONS -- 17.6% BANKS -- 14.8% Thrifts & Mortgage Finance -- 14.8% 1,589,664 NR/NR A10 Securitization 2013-1 LLC, 2.4%, 11/15/25 (144A) $ 1,596,694 2,794,000 NR/NR A10 Term Asset Financing 2013-2 LLC, 2.62%, 11/15/27 (144A) 2,796,372 574,619 0.60 CCC/NR Alternative Loan Trust 2003-14T1, Floating Rate Note, 8/25/18 546,036 1,759,598 BBB+/NR Alternative Loan Trust 2003-21T1, 5.75%, 12/25/33 1,841,859 470,063 BB-/B2 Alternative Loan Trust 2003-J1, 4.75%, 10/25/33 481,379 121,489 BBB+/Ba1 Alternative Loan Trust 2004-2CB, 5.125%, 3/25/34 121,603 The accompanying notes are an integral part of these financial statements. 28 Pioneer Bond Fund | Annual Report | 6/30/14 ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 406,608 BB+/Ba2 Alternative Loan Trust 2004-4CB, 4.25%, 4/25/34 $ 415,272 5,426,539 0.59 A+/Baa3 Alternative Loan Trust 2005-J4, Floating Rate Note, 7/25/35 5,255,353 728,535 A+/Baa2 Bank of America Alternative Loan Trust 2003-2, 5.75%, 4/25/33 755,434 1,591,914 NR/Baa2 Bank of America Alternative Loan Trust 2003-7, 5.5%, 9/25/33 1,657,647 817,028 NR/B1 Bank of America Alternative Loan Trust 2004-10, 5.5%, 11/25/19 825,664 801,450 NR/Ba3 Bank of America Alternative Loan Trust 2004-12, 5.5%, 1/25/20 812,868 1,039,636 NR/B3 Bank of America Alternative Loan Trust 2004-2, 5.5%, 3/25/19 1,064,354 1,554,606 NR/Ba2 Bank of America Alternative Loan Trust 2004-2, 6.0%, 3/25/34 1,608,221 706,430 NR/B2 Bank of America Alternative Loan Trust 2004-4, 5.25%, 5/25/34 715,967 1,536,420 NR/Ba3 Bank of America Alternative Loan Trust 2004-6, 5.0%, 7/25/19 1,562,900 853,018 BBB+/NR Bank of America Funding 2003-3 Trust, 5.5%, 10/25/33 884,789 1,371,301 CCC/NR Bank of America Funding 2005-8 Trust, 5.5%, 1/25/36 1,385,644 653,072 0.28 BB-/A Bank of America Funding 2010-R4 Trust REMICS, Floating Rate Note, 8/26/36 (144A) 648,186 400,000 1.25 A-/Aaa Bank of America Large Loan Trust 2007-BMB1, Floating Rate Note, 8/15/29 (144A) 399,905 1,248,878 2.69 BBB/NR Bank of America Mortgage 2003-F Trust, Floating Rate Note, 7/25/33 1,264,539 671,807 2.74 NR/Baa3 Bank of America Mortgage 2003-H Trust, Floating Rate Note, 9/25/33 672,774 869,090 2.82 NR/Ba2 Bank of America Mortgage 2003-I Trust, Floating Rate Note, 10/25/33 880,360 530,418 5.12 BBB+/NR Bank of America Mortgage 2005-H Trust, Floating Rate Note, 9/25/35 532,645 1,192,237 A+/NR Bank of America Mortgage Trust 2004-11, 5.75%, 1/25/35 1,212,898 102,731 B-/NR Bank of America Mortgage Trust 2004-7, 4.5%, 8/25/19 104,233 1,170,406 A+/NR Bank of America Mortgage Trust 2004-9, 5.5%, 11/25/34 1,190,160 10,122,430 NR/Caa2 Bayview Commercial Asset Trust, 7/25/37 (Step) (144A) (c) (d) 58,710 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/14 29 Schedule of Investments | 6/30/14 (continued) ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 6,921,535 NR/Caa2 Bayview Commercial Asset Trust, 3.53033%, 9/25/37 (Step) (144A) (c) $ 448,515 465,773 2.98 NR/NR Bayview Opportunity Master Fund Trust IIB LP, Floating Rate Note, 1/28/33 (144A) 465,867 1,890,365 0.85 AA+/Baa1 Bear Stearns ALT-A Trust 2004-12, Floating Rate Note, 1/25/35 1,835,918 1,959,656 0.85 AAA/A3 Bear Stearns ALT-A Trust 2004-12, Floating Rate Note, 1/25/35 1,916,628 3,121,749 0.75 A+/Ba1 Bear Stearns ALT-A Trust 2004-4, Floating Rate Note, 6/25/34 3,000,713 1,070,871 0.71 AA+/Baa1 Bear Stearns ALT-A Trust 2005-1, Floating Rate Note, 1/25/35 1,068,659 839,296 2.33 AA+/Baa2 Bear Stearns ARM Trust 2003-5, Floating Rate Note, 8/25/33 842,748 3,238,162 2.74 A+/Ba3 Bear Stearns ARM Trust 2003-6, Floating Rate Note, 8/25/33 3,255,752 199,600 7.66 AAA/Aaa Bear Stearns Commercial Mortgage Securities Trust 2002-TOP6, Floating Rate Note, 10/15/36 (144A) 200,280 1,000,000 5.21 NR/Ba1 Bear Stearns Commercial Mortgage Securities Trust 2005-PWR7, Floating Rate Note, 2/11/41 1,009,636 2,064,693 0.85 AA+/Baa3 Bella Vista Mortgage Trust 2004-1, Floating Rate Note, 11/20/34 2,000,109 621,427 2.65 A+/Ba1 CHL Mortgage Pass-Through Trust 2003-56, Floating Rate Note, 12/25/33 626,930 898,070 0.32 AA/Aaa Citigroup Commercial Mortgage Trust 2007-FL3, Floating Rate Note, 4/15/22 (144A) 891,497 1,388,403 1.15 AA+/NR Citigroup Mortgage Loan Trust 2010-7 REMICS, Floating Rate Note, 9/25/37 (144A) 1,388,129 1,605,344 2.17 BB/NR Citigroup Mortgage Loan Trust, Inc., REMICS, Floating Rate Note, 8/25/34 1,609,693 1,000,000 4.65 AA-/A3 City Center Trust 2011-CCHP, Floating Rate Note, 7/15/28 (144A) 1,000,050 540,387 0.59 A+/A2 CNL Commercial Mortgage Loan Trust 2003-2, Floating Rate Note, 10/25/30 (144A) 462,834 2,135,318 0.28 AA-/A1 COMM 2006-FL12 Mortgage Trust, Floating Rate Note, 12/15/20 (144A) 2,128,243 484,698 0.32 BBB/A1 COMM 2006-FL12 Mortgage Trust, Floating Rate Note, 12/15/20 (144A) 483,062 450,000 NR/Aaa COMM 2012-CCRE2 Mortgage Trust REMICS, 3.791%, 8/15/45 465,556 The accompanying notes are an integral part of these financial statements. 30 Pioneer Bond Fund | Annual Report | 6/30/14 ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 850,000 NR/Aaa COMM 2012-CCRE2 Mortgage Trust, 3.147%, 8/15/45 $ 859,033 915,000 AAA/Aaa COMM 2012-CCRE4 Mortgage Trust, 2.436%, 10/15/45 910,945 4,000,000 NR/Aaa COMM 2012-LC4 Mortgage Trust, 4.063%, 12/10/44 4,231,164 1,900,000 AAA/Aaa COMM 2013-LC6 Mortgage Trust, 2.941%, 1/10/46 1,876,277 3,638,736 2.09 AAA/NR Commercial Mortgage Pass Through Certificates, Floating Rate Note, 11/17/26 (144A) 3,664,069 2,663,946 NR/Baa1 Credit Suisse Commercial Mortgage Trust Series 2007-C1, 5.361%, 2/15/40 2,858,846 244,902 B-/NR Credit Suisse First Boston Mortgage Securities Corp., 5.5%, 6/25/33 245,871 531,655 2.57 BBB+/Ba2 Credit Suisse First Boston Mortgage Securities Corp., Floating Rate Note, 11/25/33 531,469 288,899 1.50 AA+/A3 Credit Suisse First Boston Mortgage Securities Corp., Floating Rate Note, 12/25/33 289,129 1,777,653 5.01 NR/Aaa Credit Suisse First Boston Mortgage Securities Corp., Floating Rate Note, 2/15/38 1,791,485 569,761 2.45 BBB+/B1 Credit Suisse First Boston Mortgage Securities Corp., Floating Rate Note, 6/25/34 572,859 93,331 0.85 AA+/Baa3 Credit-Based Asset Servicing and Securitization LLC, Floating Rate Note, 5/25/50 (144A) 93,896 1,900,000 5.58 NR/Aa2 DBUBS 2011-LC3 Mortgage Trust, Floating Rate Note, 8/10/44 (144A) 2,145,096 1,100,000 1.25 AA-/NR Extended Stay America Trust 2013-ESH, Floating Rate Note, 12/5/31 (144A) 1,099,278 449,478 2.57 BB-/B1 First Horizon Mortgage Pass-Through Trust 2005-AR1, Floating Rate Note, 4/25/35 454,753 1,035,698 CCC/Caa3 Global Mortgage Securitization, Ltd., 5.25%, 4/25/32 (144A) 1,000,117 2,008,072 0.42 BB/Ba2 Global Mortgage Securitization, Ltd., Floating Rate Note, 4/25/32 1,928,159 3,375,000 AAA/NR GMAC Commercial Mortgage Securities Inc Series 2004-C3 Trust, 4.864%, 12/10/41 3,407,255 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/14 31 Schedule of Investments | 6/30/14 (continued) ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 1,199,597 3.39 BBB/Baa3 GMACM Mortgage Loan Trust 2003-AR1, Floating Rate Note, 10/19/33 $ 1,185,962 5,969,586 AA+/Aaa Government National Mortgage Association REMICS, 2.1%, 2/16/48 5,962,650 1,250,000 NR/Aaa GS Mortgage Securities Corp. II, 3.377%, 5/10/45 1,291,759 1,000,000 AA-/NR GS Mortgage Securities Corp. II, 3.682%, 2/10/46 (144A) 1,003,925 900,000 NR/Aaa GS Mortgage Securities Corp. II, 5.56%, 11/10/39 975,910 1,550,000 1.90 NR/A3 GS Mortgage Securities Corp. II, Floating Rate Note, 11/8/29 (144A) 1,565,539 1,226,184 2.30 A+/NR GSR Mortgage Loan Trust 2003-9, Floating Rate Note, 8/25/33 1,252,709 1,935,396 2.67 A+/B1 GSR Mortgage Loan Trust 2004-7, Floating Rate Note, 6/25/34 1,891,632 729,190 2.67 BBB+/NR GSR Mortgage Loan Trust 2005-AR1, Floating Rate Note, 1/25/35 741,213 1,300,000 AAA/NR HLSS Servicer Advance Receivables Trust, 1.2437%, 1/17/45 1,301,040 2,414,108 0.50 AA+/Aa3 Homestar Mortgage Acceptance Corp., Floating Rate Note, 6/25/34 2,394,658 616,878 0.87 BBB-/Baa2 Impac CMB Trust Series 2004-5, Floating Rate Note, 10/25/34 600,763 575,931 0.95 B-/Ba1 Impac CMB Trust Series 2004-6, Floating Rate Note, 10/25/34 551,763 2,368,402 0.89 BBB+/A3 Impac CMB Trust Series 2004-7, Floating Rate Note, 11/25/34 2,279,412 776,544 0.91 B/Ba3 Impac CMB Trust Series 2004-9, Floating Rate Note, 1/25/35 708,884 2,162,543 0.95 AAA/Aaa Impac Secured Assets CMN Owner Trust, Floating Rate Note, 11/25/34 2,110,939 458,083 0.50 AAA/Aaa Impac Secured Assets Trust 2006-2, Floating Rate Note, 8/25/36 448,939 1,303,806 0.35 BB+/Baa2 Impac Secured Assets Trust 2006-5, Floating Rate Note, 12/25/36 1,212,155 2,800,000 2.52 A/A2 JP Morgan Chase Commercial Mortgage Securities Corp., Floating Rate Note, 10/15/25 (144A) 2,804,679 464,875 0.31 AA/Aa3 JP Morgan Chase Commercial Mortgage Securities Trust 2006-LDP9, Floating Rate Note, 5/15/47 463,359 1,600,000 AAA/NR JP Morgan Chase Commercial Mortgage Securities Trust 2010-C2, 3.6159%, 11/15/43 (144A) 1,702,942 The accompanying notes are an integral part of these financial statements. 32 Pioneer Bond Fund | Annual Report | 6/30/14 ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 1,350,000 NR/Aaa JP Morgan Chase Commercial Mortgage Securities Trust 2011-C5, 4.1712%, 8/15/46 $ 1,465,017 900,000 3.98 AA/NR JP Morgan Chase Commercial Mortgage Securities Trust 2012-C8, Floating Rate Note, 10/15/45 (144A) 926,515 1,368,000 3.00 AA-/NR JP Morgan Chase Commercial Mortgage Securities Trust 2013-ALC, Floating Rate Note, 7/17/26 (144A) 1,388,190 1,500,000 1.95 A-/NR JP Morgan Chase Commercial Mortgage Securities Trust 2013-FL3, Floating Rate Note, 4/15/28 (144A) 1,506,519 1,429,944 2.03 A+/Baa1 JP Morgan Mortgage Trust 2003-A1, Floating Rate Note, 10/25/33 1,442,242 1,105,888 2.49 A+/Baa1 JP Morgan Mortgage Trust 2003-A1, Floating Rate Note, 10/25/33 1,112,314 2,048,670 2.49 AA+/Baa3 JP Morgan Mortgage Trust 2004-A1, Floating Rate Note, 2/25/34 2,112,596 984,888 2.49 AA+/Baa1 JP Morgan Mortgage Trust 2004-A1, Floating Rate Note, 2/25/34 1,009,355 241,603 2.61 A+/NR JP Morgan Mortgage Trust 2004-A2, Floating Rate Note, 5/25/34 242,638 1,172,511 2.28 AA+/Baa2 JP Morgan Mortgage Trust 2004-A5, Floating Rate Note, 12/25/34 1,178,575 985,367 B+/Baa3 JP Morgan Mortgage Trust 2004-S1, 5.0%, 9/25/34 1,026,792 1,884,740 B-/Ba2 JP Morgan Mortgage Trust 2004-S1, 6.0%, 9/25/34 1,915,381 356,791 2.20 BBB+/Baa3 JP Morgan Mortgage Trust 2005-A4, Floating Rate Note, 7/25/35 357,793 884,529 3.50 AAA/NR JP Morgan Mortgage Trust 2013-2, Floating Rate Note, 5/25/43 (144A) 889,458 989,399 3.50 AAA/NR JP Morgan Mortgage Trust 2014-1 REMICS, Floating Rate Note, 1/25/44 (144A) 980,956 10,055,000 3.00 AAA/NR JP Morgan Mortgage Trust 2014-2, Floating Rate Note, 6/25/29 (144A) 10,279,666 532,610 2.75 NR/NR La Hipotecaria Panamanian Mortgage Trust 2010-1, Floating Rate Note, 9/8/39 (144A) 552,084 207,242 AAA/Aaa LB-UBS Commercial Mortgage Trust 2004-C1, 4.568%, 1/15/31 214,154 2,255,000 5.20 NR/Baa2 LB-UBS Commercial Mortgage Trust 2005-C2 REMICS, Floating Rate Note, 4/15/30 2,320,066 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/14 33 Schedule of Investments | 6/30/14 (continued) ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 1,000,000 5.15 NR/Aaa LB-UBS Commercial Mortgage Trust 2005-C2, Floating Rate Note, 4/15/30 $ 1,023,570 324,985 1.10 A+/Aa1 Lehman Brothers Small Balance Commercial Mortgage Trust 2007-3 Class 1A4, Floating Rate Note, 10/25/37 (144A) 322,738 518,590 0.40 A+/Aa1 Lehman Brothers Small Balance Commercial, Floating Rate Note, 9/25/30 (144A) 485,321 1,395,000 5.33 NR/A1 LSTAR Commercial Mortgage Trust, Floating Rate Note, 6/25/43 (144A) 1,418,497 1,012,907 5.24 B-/B3 MASTR Adjustable Rate Mortgages Trust, Floating Rate Note, 1/25/35 967,034 880,150 BB+/NR MASTR Alternative Loan Trust 2004-10, 5.5%, 10/25/19 901,807 26,741 AAA/NR MASTR Alternative Loan Trust 2004-13, 4.5%, 1/25/15 26,701 2,254,705 B-/NR MASTR Alternative Loan Trust 2004-6, 6.0%, 7/25/34 2,294,093 1,520,488 A+/NR MASTR Alternative Loan Trust 2005-1, 5.5%, 2/25/35 1,544,034 782,513 6.62 A-/NR MASTR Seasoned Securitization Trust 2005-1, Floating Rate Note, 9/25/32 818,035 623,876 0.63 AA+/Baa1 Mellon Residential Funding Corp., Mortgage Pass-Through Trust Series 2000 TBC2, Floating Rate Note, 6/15/30 616,859 861,506 0.59 AA+/Baa1 Mellon Residential Funding Corp., Mortgage Pass-Through Trust Series 2000-TBC3, Floating Rate Note, 12/15/30 818,870 272,264 2.40 BBB/B1 Merrill Lynch Mortgage Investors Trust Series 2005-2, Floating Rate Note, 10/25/35 276,101 3,627,175 0.42 AA+/A3 Merrill Lynch Mortgage Investors Trust Series 2005-A3, Floating Rate Note, 4/25/35 3,471,069 3,153,275 0.43 A+/Baa2 Morgan Stanley Mortgage Loan Trust 2005-6AR, Floating Rate Note, 11/25/35 3,114,395 2,851,986 0.93 AA+/Baa1 MortgageIT Trust 2004-1, Floating Rate Note, 11/25/34 2,779,354 943,199 3.75 AAA/NR Nationstar Mortgage Loan Trust 2013-A, Floating Rate Note, 12/25/52 (144A) 960,884 The accompanying notes are an integral part of these financial statements. 34 Pioneer Bond Fund | Annual Report | 6/30/14 ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 2,579,027 0.34 NR/NR Nomura Resecuritization Trust 2011-3R, Floating Rate Note, 7/26/37 (144A) $ 2,503,203 2,085,351 1.35 AAA/Aaa NorthStar 2012-1 Mortgage Trust, Floating Rate Note, 8/25/29 (144A) 2,087,157 5,577,903 3.25 AAA/NR NRP Mortgage Trust 2013-1, Floating Rate Note, 7/25/43 (144A) 5,691,011 462,128 0.40 BB+/Ba3 Opteum Mortgage Acceptance Corp., Asset Backed Pass-Through Certificates 2005-5, Floating Rate Note, 12/25/35 457,113 1,474,859 NR/NR ORES 2014-LV3 LLC, 3.0%, 3/27/24 (144A) 1,474,956 446,744 NR/A2 PHH Mortgage Capital LLC, 6.6%, 12/25/27 (Step) (144A) 453,269 430,644 BB+/Caa1 RAAC Series 2004-SP2 Trust, 6.0%, 1/25/32 438,793 751,431 0.72 B+/Ba1 RALI Series 2003-QS11 Trust, Floating Rate Note, 6/25/33 713,168 760,622 0.70 B-/Ba2 RALI Series 2003-QS13 Trust, Floating Rate Note, 7/25/33 707,444 531,322 NR/Ba3 RALI Series 2003-QS14 Trust, 5.0%, 7/25/18 540,215 2,308,639 NR/B1 RALI Series 2004-QS13 Trust, 5.0%, 9/25/19 2,363,137 831,700 NR/B3 RALI Series 2004-QS16 Trust, 5.5%, 12/25/34 846,215 1,310,285 NR/Ba2 RALI Series 2004-QS3 Trust, 5.0%, 3/25/19 1,341,984 573,868 1.55 B-/Ba3 RESI Finance LP, Floating Rate Note, 9/10/35 (144A) 498,599 284,109 B-/NR Residential Asset Securitization Trust 2004-A10, 5.5%, 2/25/35 289,107 487,238 BBB/NR Residential Asset Securitization Trust 2004-A8, 5.25%, 11/25/34 506,960 1,563,435 B/NR Residential Asset Securitization Trust 2004-A9, 5.75%, 12/25/34 1,618,298 1,000,578 NR/B3 RFMSI Series 2005-S5 Trust, 5.25%, 7/25/35 1,033,076 2,815,888 0.81 AA/Ba1 Sequoia Mortgage Trust 2003-2, Floating Rate Note, 6/20/33 2,737,770 1,332,542 0.77 AA+/Baa3 Sequoia Mortgage Trust 2003-5, Floating Rate Note, 9/20/33 1,305,186 1,183,989 0.62 AA/Baa3 Sequoia Mortgage Trust 2004-12 REMICS, Floating Rate Note, 1/20/35 1,099,979 1,081,723 0.49 A+/Baa2 Sequoia Mortgage Trust 2004-9, Floating Rate Note, 10/20/34 1,034,907 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/14 35 Schedule of Investments | 6/30/14 (continued) ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 1,396,469 0.37 BBB+/Ba1 Sequoia Mortgage Trust 2005-2, Floating Rate Note, 3/20/35 $ 1,295,253 2,185,318 3.00 NR/Aaa Sequoia Mortgage Trust 2013-6, Floating Rate Note, 5/25/43 2,031,448 1,761,837 3.00 AAA/NR Sequoia Mortgage Trust 2013-7, Floating Rate Note, 6/25/43 1,683,025 700,291 2.25 NR/Aaa Sequoia Mortgage Trust 2013-8, Floating Rate Note, 6/25/43 663,115 835,876 3.00 NR/Aaa Sequoia Mortgage Trust 2013-8, Floating Rate Note, 6/25/43 798,681 2,081,531 AAA/Aaa Sequoia Mortgage Trust 2013-9, 3.5%, 7/25/43 (144A) 2,074,535 48,580 NR/Baa3 SMA Issuer I LLC, 3.5%, 8/20/25 (144A) 48,594 1,796,077 2.22 AAA/NR Springleaf Mortgage Loan Trust 2012-2, Floating Rate Note, 10/25/57 (144A) 1,818,934 750,000 3.79 A-/NR Springleaf Mortgage Loan Trust, Floating Rate Note, 6/25/58 (144A) 756,068 665,984 2.52 BBB-/B3 Structured Adjustable Rate Mortgage Loan Trust, Floating Rate Note, 1/25/35 662,086 452,322 4.59 BBB+/Ba2 Structured Adjustable Rate Mortgage Loan Trust, Floating Rate Note, 11/25/34 447,132 4,513,751 0.84 AA+/Baa1 Structured Asset Mortgage Investments II Trust 2004-AR8, Floating Rate Note, 5/19/35 4,423,056 1,186,427 0.90 A+/Ba1 Structured Asset Mortgage Investments Trust 2003-AR2, Floating Rate Note, 12/19/33 1,136,636 843,644 2.69 A+/Baa3 Structured Asset Securities Corp. Mortgage Certificates Series 2003-31A, Floating Rate Note, 10/25/33 844,406 933,687 0.45 B-/B2 Structured Asset Securities Corp. Trust 2005-14, Floating Rate Note, 7/25/35 848,746 854,996 2.17 NR/Baa2 Thornburg Mortgage Securities Trust 2003-3, Floating Rate Note, 6/25/43 855,693 3,289,927 0.89 BBB+/Baa3 Thornburg Mortgage Securities Trust 2004-3, Floating Rate Note, 9/25/44 3,192,940 761,569 1.77 AAA/Baa3 Thornburg Mortgage Securities Trust Class II4A, Floating Rate Note, 3/25/44 756,876 4,470,000 AAA/Aa1 TimberStar Trust 1 REMICS, 5.668%, 10/15/36 (144A) 4,869,578 1,435,000 AA/Aa3 TimberStar Trust 1, 5.7467%, 10/15/36 (144A) 1,562,414 The accompanying notes are an integral part of these financial statements. 36 Pioneer Bond Fund | Annual Report | 6/30/14 ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 1,011,393 NR/NR VOLT XXIII LLC, 3.625%, 11/25/53 (Step) $ 1,019,877 3,400,175 AAA/Aaa Wachovia Bank Commercial Mortgage Trust Series 2004-C15, 4.803%, 10/15/41 3,409,172 2,403,017 2.44 A+/Baa1 WaMu Mortgage Pass-Through Certificates Series 2003-AR6 Trust, Floating Rate Note, 6/25/33 2,429,217 2,081,888 2.41 BBB/NR WaMu Mortgage Pass-Through Certificates Series 2005-AR3 Trust, Floating Rate Note, 3/25/35 2,088,896 3,359,910 2.40 BBB+/NR WaMu Mortgage Pass-Through Certificates, Floating Rate Note, 1/25/35 3,374,882 1,233,457 0.56 AA+/A1 Wells Fargo Alternative Loan 2005-2 Trust, Floating Rate Note, 10/25/35 1,221,147 1,927,000 NR/Aaa Wells Fargo Commercial Mortgage Trust 2012-LC5 REMICS, 3.539%, 10/15/45 1,962,353 1,800,000 1.18 AAA/NR Wells Fargo Commercial Mortgage Trust 2014-TISH, Floating Rate Note, 2/15/27 (144A) 1,803,958 2,946,198 NR/Aaa Wells Fargo Commercial Mortgage Trust, 3.349%, 11/15/43 (144A) 3,073,185 624,998 2.49 AA+/Baa1 Wells Fargo Mortgage Backed Securities 2003-L Trust, Floating Rate Note, 11/25/33 634,350 260,728 2.54 BBB+/Baa3 Wells Fargo Mortgage Backed Securities 2003-L Trust, Floating Rate Note, 11/25/33 257,350 1,020,521 2.62 A+/Ba1 Wells Fargo Mortgage Backed Securities 2004-K Trust, Floating Rate Note, 7/25/34 1,034,266 276,678 AA+/Baa1 Wells Fargo Mortgage Backed Securities 2006-16 Trust, 5.0%, 11/25/36 286,849 1,076,773 4.86 BBB+/Ba3 Wells Fargo Mortgage Backed Securities Trust, Floating Rate Note, 8/25/34 1,067,782 350,000 5.39 NR/A2 WF-RBS Commercial Mortgage Trust 2011-C2, Floating Rate Note, 2/15/44 (144A) 391,446 -------------- $ 254,128,984 -------------- Total Banks $ 254,128,984 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/14 37 Schedule of Investments | 6/30/14 (continued) ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 1.3% Other Diversified Financial Services -- 1.3% 1,895,000 1.45 AA-/NR Del Coronado Trust 2013-DEL, Floating Rate Note, 3/15/26 (144A) $ 1,893,380 2,362,483 0.40 A+/Aa3 GE Business Loan Trust 2005-1, Floating Rate Note, 6/15/33 (144A) 2,259,533 1,511,247 0.32 A+/Aa3 GE Business Loan Trust 2007-1, Floating Rate Note, 4/16/35 (144A) 1,420,855 345,194 2.55 NR/NR Jefferies Resecuritization Trust 2009-R2, Floating Rate Note, 5/26/37 (144A) 344,316 5,179,445 2.50 NR/NR JP Morgan Mortgage Trust 2013-1, Floating Rate Note, 3/25/43 (144A) 5,125,139 905,232 AAA/NR Morgan Stanley Capital I Trust 2004-HQ4 REMICS, 4.97%, 4/14/40 904,910 2,400,000 5.07 BBB-/NR Morgan Stanley Capital I Trust 2005-HQ6 REMICS, Floating Rate Note, 8/13/42 2,481,348 1,000,000 BBB-/NR Morgan Stanley Capital I Trust 2007-HQ13, 5.569%, 12/15/44 1,088,988 645,998 0.25 AA+/Aaa Morgan Stanley Capital I, Inc., Floating Rate Note, 10/15/20 (144A) 645,256 5,102,000 0.28 A+/Aa1 Morgan Stanley Capital I, Inc., Floating Rate Note, 10/15/20 (144A) 5,081,291 200,000 A+/NR Spirit Master Funding VII LLC, 3.8868%, 12/20/43 206,918 -------------- $ 21,451,934 -------------- Total Diversified Financials $ 21,451,934 ---------------------------------------------------------------------------------------------------- GOVERNMENT -- 1.5% 548,223 AA+/Aaa Federal Home Loan Mortgage Corp., REMICS, 5.0%, 6/15/33 $ 554,107 251,970 AA+/Aaa Federal Home Loan Mortgage Corp., REMICS, 5.0%, 6/15/34 254,402 1,250,000 AA+/Baa2 Federal Home Loan Mortgage Corp., 4.304%, 9/25/44 (144A) 1,308,030 4,117 AA+/NR Federal National Mortgage Association REMICS, 10.3%, 4/25/19 4,639 886,711 AA+/Aaa Federal National Mortgage Association REMICS, 4.5%, 6/25/29 961,393 1,219,998 AA+/Aaa Federal National Mortgage Association REMICS, 5.0%, 7/25/33 1,240,631 149,778 AA+/Aaa Federal National Mortgage Association REMICS, 5.0%, 9/25/39 156,854 850,000 AA+/A3 FREMF Mortgage Trust 2010-K7, 5.618%, 4/25/20 (144A) 960,427 The accompanying notes are an integral part of these financial statements. 38 Pioneer Bond Fund | Annual Report | 6/30/14 ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- Government -- (continued) 600,000 A+/Aaa FREMF Mortgage Trust 2010-K8, 5.405%, 9/25/43 (144A) $ 671,684 890,000 AA+/Aaa FREMF Mortgage Trust 2010-K9 REMICS, 5.36%, 9/25/45 (144A) 994,346 1,500,000 AA+/Aaa FREMF Mortgage Trust 2011-K10, 4.774%, 11/25/49 (144A) 1,622,451 1,750,000 NR/A3 FREMF Mortgage Trust 2011-K702, 4.936%, 4/25/44 (144A) 1,899,879 1,250,000 AA+/A3 FREMF Mortgage Trust 2011-K703, 5.051%, 7/25/44 (144A) 1,362,905 900,000 A-/Baa2 FREMF Mortgage Trust 2013-K502, 3.31%, 3/25/45 (144A) 913,344 650,000 3.61 NR/A2 FREMF Mortgage Trust Class B, Floating Rate Note, 11/25/46 (144A) 673,496 858,000 3.95 AA+/Aaa FREMF Mortgage Trust Class B, Floating Rate Note, 6/25/47 (144A) 899,407 5,000,000 4.44 A-/Aaa FREMF Mortgage Trust Class B, Floating Rate Note, 7/25/48 (144A) 5,326,670 11,536,457 AA+/Aaa Government National Mortgage Association, 1.015%, 2/16/53 (c) 893,256 7,955,993 AA+/Aaa Government National Mortgage Association, 1.033%, 3/16/53 (c) 589,873 13,307,387 AA+/Aaa Government National Mortgage Association, 1.063%, 8/16/52 (c) 892,047 12,483,470 AA+/Aaa Government National Mortgage Association, 1.066%, 9/16/52 (c) 1,003,908 1,790,719 AA+/Aaa Government National Mortgage Association, 3.0%, 4/20/41 1,861,087 299,545 AA+/Aaa Government National Mortgage Association, 4.973%, 4/16/42 319,738 714,788 AA+/Aaa Government National Mortgage Association, 5.25%, 8/16/35 800,016 -------------- $ 26,164,590 -------------- Total Government $ 26,164,590 ---------------------------------------------------------------------------------------------------- TOTAL COLLATERALIZED MORTGAGE OBLIGATIONS (Cost $297,726,860) $ 301,745,508 ---------------------------------------------------------------------------------------------------- CORPORATE BONDS -- 33.7% ENERGY -- 3.7% Oil & Gas Drilling -- 0.4% 1,025,000 BBB+/Baa1 Pride International, Inc., 6.875%, 8/15/20 $ 1,245,522 4,460,000 BBB-/Baa3 Rowan Companies, Inc., 4.75%, 1/15/24 4,718,809 -------------- $ 5,964,331 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/14 39 Schedule of Investments | 6/30/14 (continued) ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- Oil & Gas Equipment & Services -- 0.3% 1,300,000 A/A2 Halliburton Co., 7.6%, 8/15/96 (144A) $ 1,938,082 125,000 BBB-/Baa3 Weatherford International, Ltd., Bermuda, 5.95%, 4/15/42 141,761 2,815,000 BBB-/Baa3 Weatherford International, Ltd., Bermuda, 9.625%, 3/1/19 3,694,110 -------------- $ 5,773,953 ---------------------------------------------------------------------------------------------------- Oil & Gas Exploration & Production -- 0.7% 2,230,000 BBB+/Baa1 Canadian Natural Resources, Ltd., 6.5%, 2/15/37 $ 2,836,489 1,800,000 B/B2 EP Energy LLC, 9.375%, 5/1/20 2,061,000 901,000 BBB/Baa1 Marathon Oil Corp., 5.9%, 3/15/18 1,031,342 1,400,000 BBB-/Ba1 Newfield Exploration Co., 5.625%, 7/1/24 1,536,500 719,040 A/Aa3 Ras Laffan Liquefied Natural Gas Co., Ltd., III, 5.832%, 9/30/16 (144A) 762,182 1,000,000 BBB-/Baa1 Rosneft Finance SA, 6.625%, 3/20/17 (144A) 1,095,000 2,080,000 BBB-/Baa1 Rosneft Finance SA, 7.5%, 7/18/16 (144A) 2,277,600 1,000,000 BBB-/Baa1 Rosneft Finance SA, 7.875%, 3/13/18 (144A) 1,141,250 -------------- $ 12,741,363 ---------------------------------------------------------------------------------------------------- Oil & Gas Refining & Marketing -- 0.5% 1,340,000 BBB/Baa3 EnLink Midstream Partners LP, 4.4%, 4/1/24 $ 1,406,160 2,475,000 BBB-/Baa2 Spectra Energy Capital LLC, 6.2%, 4/15/18 2,840,456 2,890,000 BBB/Baa2 Valero Energy Corp., 9.375%, 3/15/19 3,793,304 -------------- $ 8,039,920 ---------------------------------------------------------------------------------------------------- Oil & Gas Storage & Transportation -- 1.8% 2,900,000 BBB-/Baa2 DCP Midstream LLC, 9.75%, 3/15/19 (144A) $ 3,739,164 3,950,000 5.85 BB/Baa3 DCP Midstream LLC, Floating Rate Note, 5/21/43 (144A) 3,752,500 1,200,000 3.24 BB/Ba1 Energy Transfer Partners LP, Floating Rate Note, 11/1/66 1,102,800 5,310,000 BBB+/Baa1 Enterprise Products Operating LLC, 3.9%, 2/15/24 5,492,977 3,250,000 BBB/Baa2 Kinder Morgan Energy Partners LP, 5.95%, 2/15/18 3,708,256 The accompanying notes are an integral part of these financial statements. 40 Pioneer Bond Fund | Annual Report | 6/30/14 ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- Oil & Gas Storage & Transportation -- (continued) 1,500,000 BBB-/Baa2 Spectra Energy Capital LLC, 6.75%, 7/15/18 $ 1,721,550 1,500,000 BBB-/Baa3 Sunoco Logistics Partners Operations LP, 4.25%, 4/1/24 1,544,188 2,200,000 BBB-/Baa3 Sunoco Logistics Partners Operations LP, 6.1%, 2/15/42 2,538,371 2,475,000 BB+/Baa3 The Williams Companies, Inc., 7.75%, 6/15/31 2,982,318 3,605,000 BBB/Baa2 Williams Partners LP, 4.3%, 3/4/24 3,759,647 -------------- $ 30,341,771 -------------- Total Energy $ 62,861,338 ---------------------------------------------------------------------------------------------------- MATERIALS -- 1.6% Diversified Chemicals -- 0.4% 4,845,000 BBB-/Baa2 CF Industries, Inc., 5.15%, 3/15/34 $ 5,161,621 980,000 BBB/Baa2 Eastman Chemical Co., 4.8%, 9/1/42 995,066 -------------- $ 6,156,687 ---------------------------------------------------------------------------------------------------- Fertilizers & Agricultural Chemicals -- 0.1% 2,675,000 BBB+/A3 Monsanto Co., 3.375%, 7/15/24 $ 2,692,682 ---------------------------------------------------------------------------------------------------- Construction Materials -- 0.2% 3,328,000 B+/NR CEMEX Espana SA, 9.875%, 4/30/19 (144A) $ 3,818,880 475,000 BBB/Baa2 Holcim US Finance Sarl & Cie SCS, 6.0%, 12/30/19 (144A) 550,347 -------------- $ 4,369,227 ---------------------------------------------------------------------------------------------------- Diversified Metals & Mining -- 0.5% 2,335,000 BB+/Baa3 AngloGold Ashanti Holdings Plc, 5.375%, 4/15/20 $ 2,371,347 1,850,000 BBB/Baa3 Freeport-McMoRan, Inc., 3.875%, 3/15/23 1,844,369 5,000,000 BB+/Ba1 Gold Fields Orogen Holding BVI, Ltd., 4.875%, 10/7/20 (144A) 4,600,000 -------------- $ 8,815,716 ---------------------------------------------------------------------------------------------------- Gold -- 0.1% 1,650,000 BBB+/Baa2 Goldcorp, Inc., 3.7%, 3/15/23 $ 1,627,456 ---------------------------------------------------------------------------------------------------- Steel -- 0.3% 1,175,000 BBB/Baa2 Glencore Funding LLC, 4.125%, 5/30/23 (144A) $ 1,180,101 3,135,000 BBB/Baa3 Worthington Industries, Inc., 4.55%, 4/15/26 3,260,851 -------------- $ 4,440,952 -------------- Total Materials $ 28,102,720 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/14 41 Schedule of Investments | 6/30/14 (continued) ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- CAPITAL GOODS -- 1.9% Aerospace & Defense -- 0.1% 2,250,000 BB-/Ba3 Bombardier, Inc., 4.25%, 1/15/16 (144A) $ 2,323,125 ---------------------------------------------------------------------------------------------------- Building Products -- 0.5% 825,000 BBB-/Ba3 Masco Corp., 5.95%, 3/15/22 $ 911,625 4,260,000 BBB-/Ba3 Masco Corp., 7.125%, 3/15/20 5,012,827 1,750,000 5.75 BBB+/Baa2 Stanley Black & Decker, Inc., Floating Rate Note, 12/15/53 1,890,000 -------------- $ 7,814,452 ---------------------------------------------------------------------------------------------------- Industrial Conglomerates -- 0.2% 2,950,000 A-/Baa1 Tyco Electronics Group SA, 6.55%, 10/1/17 $ 3,413,699 ---------------------------------------------------------------------------------------------------- Construction & Farm Machinery & Heavy Trucks -- 0.3% 3,200,000 A/A3 Cummins, Inc., 5.65%, 3/1/98 $ 3,623,453 910,000 A/A3 Cummins, Inc., 6.75%, 2/15/27 1,136,841 -------------- $ 4,760,294 ---------------------------------------------------------------------------------------------------- Industrial Machinery -- 0.1% 1,810,000 BBB/Baa2 Valmont Industries, Inc., 6.625%, 4/20/20 $ 2,150,819 ---------------------------------------------------------------------------------------------------- Trading Companies & Distributors -- 0.7% 3,525,000 BB+/NR Aviation Capital Group Corp., 6.75%, 4/6/21 (144A) $ 3,965,361 2,260,000 BBB/Baa2 GATX Corp., 5.2%, 3/15/44 2,408,491 5,660,000 BBB/Baa2 GATX Corp., 6.0%, 2/15/18 6,387,412 -------------- $ 12,761,264 -------------- Total Capital Goods $ 33,223,653 ---------------------------------------------------------------------------------------------------- TRANSPORTATION -- 0.1% Airlines -- 0.1% 1,500,000 A-/Baa1 US Airways 2013-1 Class A Pass Through Trust, 3.95%, 5/15/27 $ 1,522,500 ---------------------------------------------------------------------------------------------------- Trucking -- 0.0%+ 529,000 BBB-/Baa2 Asciano Finance, Ltd., 4.625%, 9/23/20 (144A) $ 564,761 -------------- Total Transportation $ 2,087,261 ---------------------------------------------------------------------------------------------------- AUTOMOBILES & COMPONENTS -- 0.4% Auto Parts & Equipment -- 0.3% 5,400,000 BBB-/Baa3 Delphi Corp., 4.15%, 3/15/24 $ 5,607,041 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 42 Pioneer Bond Fund | Annual Report | 6/30/14 ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- Automobile Manufacturers -- 0.1% 655,000 BBB+/Baa1 Hyundai Motor Manufacturing Czech s.r.o., 4.5%, 4/15/15 (144A) $ 673,341 790,000 BBB+/A3 Nissan Motor Acceptance Corp., 4.5%, 1/30/15 (144A) 807,170 -------------- $ 1,480,511 -------------- Total Automobiles & Components $ 7,087,552 ---------------------------------------------------------------------------------------------------- CONSUMER DURABLES & APPAREL -- 0.1% Home Furnishings -- 0.1% 800,000 BBB/Baa3 Mohawk Industries, Inc., 3.85%, 2/1/23 $ 797,000 -------------- Total Consumer Durables & Apparel $ 797,000 ---------------------------------------------------------------------------------------------------- CONSUMER SERVICES -- 0.5% Casinos & Gaming -- 0.1% 1,010,000 BBB-/Ba1 GLP Capital LP, 4.375%, 11/1/18 (144A) $ 1,042,825 ---------------------------------------------------------------------------------------------------- Education Services -- 0.4% 1,000,000 NR/Aa2 Bowdoin College, 4.693%, 7/1/12 $ 939,135 2,600,000 AAA/Aaa President and Fellows of Harvard College, 2.3%, 10/1/23 2,442,440 3,550,000 AA-/Aa2 Tufts University, 5.017%, 4/15/12 3,604,801 -------------- $ 6,986,376 -------------- Total Consumer Services $ 8,029,201 ---------------------------------------------------------------------------------------------------- MEDIA -- 0.2% Movies & Entertainment -- 0.2% 3,200,000 BBB/Baa2 Viacom, Inc., 5.25%, 4/1/44 $ 3,380,589 -------------- Total Media $ 3,380,589 ---------------------------------------------------------------------------------------------------- RETAILING -- 0.1% Internet Retail -- 0.1% 800,000 BBB-/Ba1 Expedia, Inc., 5.95%, 8/15/20 $ 905,166 -------------- Total Retailing $ 905,166 ---------------------------------------------------------------------------------------------------- FOOD & STAPLES RETAILING -- 0.1% Drug Retail -- 0.1% 689,016 BBB+/Baa1 CVS Pass-Through Trust, 5.298%, 1/11/27 (144A) $ 767,633 1,422,401 BBB+/Baa1 CVS Pass-Through Trust, 5.773%, 1/10/33 (144A) 1,592,214 -------------- $ 2,359,847 -------------- Total Food & Staples Retailing $ 2,359,847 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/14 43 Schedule of Investments | 6/30/14 (continued) ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- FOOD, BEVERAGE & TOBACCO -- 1.0% Agricultural Products -- 0.3% 5,175,000 BBB/Baa2 Viterra, Inc., 5.95%, 8/1/20 (144A) $ 5,906,538 ---------------------------------------------------------------------------------------------------- Packaged Foods & Meats -- 0.6% 4,200,000 BBB/NR Grupo Bimbo SAB de CV, 3.875%, 6/27/24 (144A) $ 4,191,684 3,240,000 BBB/Baa2 Kraft Foods Group, Inc., 3.5%, 6/6/22 3,326,719 2,581,000 BBB-/Baa1 Mondelez International, Inc., 6.5%, 2/9/40 3,305,043 -------------- $ 10,823,446 ---------------------------------------------------------------------------------------------------- Tobacco -- 0.1% 1,050,000 BBB-/Baa2 Lorillard Tobacco Co., 3.75%, 5/20/23 $ 1,036,997 -------------- Total Food, Beverage & Tobacco $ 17,766,981 ---------------------------------------------------------------------------------------------------- HEALTH CARE EQUIPMENT & SERVICES -- 0.3% Health Care Services -- 0.2% 2,600,000 A+/A1 Catholic Health Initiatives, 4.35%, 11/1/42 $ 2,491,629 ---------------------------------------------------------------------------------------------------- Health Care Facilities -- 0.1% 2,400,000 A-/A3 NYU Hospitals Center, 4.428%, 7/1/42 $ 2,252,851 -------------- Total Health Care Equipment & Services $ 4,744,480 ---------------------------------------------------------------------------------------------------- PHARMACEUTICALS, BIOTECHNOLOGY & LIFE SCIENCES -- 0.4% Life Sciences Tools & Services -- 0.4% 5,366,000 BBB+/Baa2 Agilent Technologies, Inc., 6.5%, 11/1/17 $ 6,135,425 -------------- Total Pharmaceuticals, Biotechnology & Life Sciences $ 6,135,425 ---------------------------------------------------------------------------------------------------- BANKS -- 4.7% Diversified Banks -- 2.6% 1,865,000 BBB+/A3 Australia & New Zealand Banking Group, Ltd., 4.5%, 3/19/24 (144A) $ 1,914,229 3,515,000 BBB/Baa3 Barclays Bank Plc, 6.05%, 12/4/17 (144A) 3,987,465 2,400,000 NR/A2 BBVA Bancomer SA Texas, 4.375%, 4/10/24 (144A) 2,445,000 3,815,000 NR/Baa2 BBVA Bancomer SA Texas, 6.5%, 3/10/21 (144A) 4,301,412 The accompanying notes are an integral part of these financial statements. 44 Pioneer Bond Fund | Annual Report | 6/30/14 ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- Diversified Banks -- (continued) 2,000,000 5.90 BB+/Ba3 Citigroup, Inc., Floating Rate Note (Perpetual) $ 2,020,000 3,435,000 AA-/Aa2 Cooperatieve Centrale Raiffeisen-Boerenleenbank BA Netherlands, 3.875%, 2/8/22 3,638,720 625,000 A+/Aa3 Export-Import Bank of Korea, Ltd., 5.875%, 1/14/15 642,088 1,305,000 A/A2 HSBC Bank Plc, 7.65%, 5/1/25 1,712,609 3,940,000 A-/A3 HSBC Holdings Plc, 4.25%, 3/14/24 4,054,756 3,476,000 BBB/Baa2 Intesa Sanpaolo S.p.A., 3.625%, 8/12/15 (144A) 3,551,447 1,400,000 BBB/Baa2 Intesa Sanpaolo S.p.A., 6.5%, 2/24/21 (144A) 1,655,847 840,000 BBB/Baa2 Macquarie Bank, Ltd., 6.625%, 4/7/21 (144A) 964,286 4,500,000 A/Baa1 Nordea Bank AB, 4.25%, 9/21/22 (144A) 4,662,140 1,157,895 2.98 A/NR SBP DPR Finance Co., Floating Rate Note, 3/15/17 (144A) 1,155,413 2,600,000 4.50 NR/Baa3 Scotiabank Peru SA, Floating Rate Note, 12/13/27 (144A) 2,489,500 2,200,000 A/A2 Standard Chartered Bank, 6.4%, 9/26/17 (144A) 2,490,981 1,300,000 A-/A3 Standard Chartered Plc, 3.95%, 1/11/23 (144A) 1,293,174 1,645,000 5.90 BBB+/Baa3 Wells Fargo & Co., Floating Rate Note, 12/29/49 1,744,934 -------------- $ 44,724,001 ---------------------------------------------------------------------------------------------------- Regional Banks -- 1.8% 1,190,000 A-/NR CoBank ACB, 7.875%, 4/16/18 (144A) $ 1,419,327 3,350,000 A/A2 HSBC Bank USA NA New York NY, 6.0%, 8/9/17 3,774,291 3,960,000 6.45 BBB/Baa3 M&T Bank Corp., Floating Rate Note (Perpetual) 4,222,350 2,505,000 A/A2 Mellon Funding Corp., 5.5%, 11/15/18 2,846,437 1,435,000 A-/A3 PNC Bank NA, 6.0%, 12/7/17 1,643,636 4,080,000 BBB-/Baa2 Santander Bank NA, 8.75%, 5/30/18 4,966,523 1,025,000 BBB/Baa1 SunTrust Banks, Inc., 3.5%, 1/20/17 1,085,250 6,273,000 4.45 BBB/Baa3 The PNC Financial Services Group, Inc., Floating Rate Note (Perpetual) 6,273,000 1,320,000 6.75 BBB/Baa3 The PNC Financial Services Group, Inc., Floating Rate Note (Perpetual) 1,471,800 3,540,000 A+/A1 Wells Fargo Bank NA, 6.0%, 11/15/17 4,055,789 -------------- $ 31,758,403 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/14 45 Schedule of Investments | 6/30/14 (continued) ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- 0.3% 2,300,000 BBB-/Baa2 Astoria Financial Corp., 5.0%, 6/19/17 $ 2,498,672 2,000,000 BBB/Baa2 Santander Holdings USA, Inc. Pennsylvania, 3.0%, 9/24/15 2,054,272 -------------- $ 4,552,944 -------------- Total Banks $ 81,035,348 ---------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 6.1% Other Diversified Financial Services -- 2.8% 3,000,000 BBB+/Baa2 Alterra Finance LLC, 6.25%, 9/30/20 $ 3,457,215 1,100,000 BBB+/Baa3 Bank of America Corp., 7.75%, 8/15/15 1,182,116 5,930,000 A-/NR Carlyle Holdings II Finance LLC, 5.625%, 3/30/43 (144A) 6,559,547 2,000,000 5.95 BB+/Ba3 Citigroup, Inc., Floating Rate Note (Perpetual) 2,020,000 5,275,000 AA-/Aa3 CNOOC Nexen Finance 2014 ULC, 4.25%, 4/30/24 5,408,637 4,860,000 AA/A2 General Electric Capital Corp., 5.3%, 2/11/21 5,526,398 1,800,000 7.12 AA-/Baa1 General Electric Capital Corp., Floating Rate Note (Perpetual) 2,124,360 2,575,000 A/A3 JPMorgan Chase & Co., 6.0%, 1/15/18 2,948,681 2,325,000 5.15 BBB/Ba1 JPMorgan Chase & Co., Floating Rate Note (Perpetual) 2,229,094 1,890,000 6.12 BBB/Ba1 JPMorgan Chase & Co., Floating Rate Note, 12/29/49 1,931,930 4,015,000 6.75 BBB/Ba1 JPMorgan Chase & Co., Floating Rate Note, 8/29/49 4,321,144 5,025,000 A/NR KKR Group Finance Co., II LLC, 5.5%, 2/1/43 (144A) 5,338,867 4,750,000 A+/Aa3 Sinopec Group Overseas Development 2014, Ltd., 4.375%, 4/10/24 (144A) 4,917,528 1,250,000 0.00 BBB/NR Tiers Trust, Floating Rate Note, 10/15/97 (144A) (e) 934,199 -------------- $ 48,899,716 ---------------------------------------------------------------------------------------------------- Specialized Finance -- 0.7% 3,200,000 BBB+/Baa1 BM&FBovespa SA, 5.5%, 7/16/20 (144A) $ 3,464,000 2,980,000 BBB-/NR Cantor Fitzgerald LP, 7.875%, 10/15/19 (144A) 3,306,322 1,475,000 BBB+/Baa2 LeasePlan Corp. NV, 2.5%, 5/16/18 (144A) 1,487,207 2,000,000 A+/A1 National Rural Utilities Cooperative Finance Corp., 5.45%, 2/1/18 2,269,904 -------------- $ 10,527,433 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 46 Pioneer Bond Fund | Annual Report | 6/30/14 ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- Consumer Finance -- 0.4% 1,465,000 BBB/Baa1 Capital One Bank USA NA, 8.8%, 7/15/19 $ 1,898,392 2,245,000 BBB+/Baa1 Hyundai Capital America, 1.45%, 2/6/17 (144A) 2,253,457 3,155,000 4.00 BB/Ba3 Navient Corp., Floating Rate Note, 7/25/14 3,155,032 -------------- $ 7,306,881 ---------------------------------------------------------------------------------------------------- Asset Management & Custody Banks -- 0.9% 2,525,000 BBB/NR Affiliated Managers Group, Inc., 4.25%, 2/15/24 $ 2,612,426 1,725,000 A+/NR Blackstone Holdings Finance Co., LLC, 5.0%, 6/15/44 (144A) 1,779,201 1,400,000 A+/NR Blackstone Holdings Finance Co., LLC, 4.75%, 2/15/23 (144A) 1,528,506 733,000 A-/A3 Eaton Vance Corp., 6.5%, 10/2/17 842,128 4,290,000 BBB/Baa1 Legg Mason, Inc., 5.625%, 1/15/44 4,663,106 2,000,000 A/A2 The Bank of New York Mellon Corp., 4.95%, 3/15/15 2,065,666 1,250,000 4.50 BBB/Baa2 The Bank of New York Mellon Corp., Floating Rate Note (Perpetual) 1,162,500 -------------- $ 14,653,533 ---------------------------------------------------------------------------------------------------- Investment Banking & Brokerage -- 1.3% 2,730,000 BBB/A3 Macquarie Group, Ltd., 6.0%, 1/14/20 (144A) $ 3,092,648 4,350,000 BBB+/Baa3 Merrill Lynch & Co., Inc., 7.75%, 5/14/38 5,975,673 5,100,000 BBB+/Baa3 Morgan Stanley Co., 4.1%, 5/22/23 5,173,506 300,000 BBB+/Baa3 Morgan Stanley Co., 4.875%, 11/1/22 322,025 3,135,000 A-/Baa2 Morgan Stanley Co., 5.5%, 1/26/20 3,588,221 643,000 NR/Aa1 North American Development Bank, 2.3%, 10/10/18 652,541 2,000,000 A-/Baa1 The Goldman Sachs Group, Inc., 5.5%, 11/15/14 2,037,420 1,450,000 BBB/NR UBS AG, 7.625%, 8/17/22 1,745,904 -------------- $ 22,587,938 -------------- Total Diversified Financials $ 103,975,501 ---------------------------------------------------------------------------------------------------- INSURANCE -- 6.4% Life & Health Insurance -- 1.7% 1,850,000 BBB+/NR Delphi Financial Group, Inc., 7.875%, 1/31/20 $ 2,245,360 1,690,000 A-/Baa1 Lincoln National Corp., 8.75%, 7/1/19 2,191,176 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/14 47 Schedule of Investments | 6/30/14 (continued) ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- Life & Health Insurance -- (continued) 4,200,000 BBB/Baa2 MetLife, Inc., 10.75%, 8/1/69 $ 6,672,750 4,250,000 A-/Baa2 Protective Life Corp., 7.375%, 10/15/19 5,258,559 1,090,000 A/Baa1 Prudential Financial, Inc., 4.5%, 11/16/21 1,199,922 1,500,000 5.62 BBB+/Baa2 Prudential Financial, Inc., Floating Rate Note, 6/15/43 1,604,520 2,140,000 8.88 BBB+/Baa2 Prudential Financial, Inc., Floating Rate Note, 6/15/68 2,624,282 1,800,000 5.88 BBB+/Baa2 Prudential Financial, Inc., Floating Rate Note, 9/15/42 1,955,250 3,205,000 AA-/Aa2 Teachers Insurance & Annuity Association of America, 6.85%, 12/16/39 (144A) 4,274,201 1,080,000 BBB/Baa2 Unum Group, Inc., 5.75%, 8/15/42 1,257,787 -------------- $ 29,283,807 ---------------------------------------------------------------------------------------------------- Multi-line Insurance -- 0.6% 3,900,000 BBB+/Baa2 Assurant, Inc., 4.0%, 3/15/23 $ 3,923,614 2,335,000 BBB/A3 AXA SA, 8.6%, 12/15/30 3,137,656 2,650,000 A+/A2 Loews Corp., 5.25%, 3/15/16 2,851,151 -------------- $ 9,912,421 ---------------------------------------------------------------------------------------------------- Property & Casualty Insurance -- 0.9% 700,000 0.00 NR/NR Arlington, Ltd., Floating Rate Note, 8/1/15 $ 705,670 1,200,000 BBB-/Baa3 Fidelity National Financial, Inc., 5.5%, 9/1/22 1,309,720 1,000,000 BBB-/Baa2 OneBeacon US Holdings, Inc., 4.6%, 11/9/22 1,032,432 1,100,000 A-/Baa2 QBE Insurance Group, Ltd., 2.4%, 5/1/18 (144A) 1,098,184 5,455,000 6.50 BBB/Baa1 The Allstate Corp., Floating Rate Note, 5/15/57 5,945,950 700,000 BBB-/Baa3 The Hanover Insurance Group, Inc., 7.5%, 3/1/20 836,342 1,952,000 BBB-/Baa3 The Hanover Insurance Group, Inc., 7.625%, 10/15/25 2,388,436 2,000,000 A/A2 The Travelers Companies, Inc., 6.25%, 6/15/37 2,579,222 -------------- $ 15,895,956 ---------------------------------------------------------------------------------------------------- Reinsurance -- 3.2% 1,800,000 6.38 NR/NR Aquarius + Investments Plc for Swiss Reinsurance Co., Ltd., Floating Rate Note, 9/1/24 $ 1,926,000 The accompanying notes are an integral part of these financial statements. 48 Pioneer Bond Fund | Annual Report | 6/30/14 ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- Reinsurance -- (continued) 500,000 3.42 BB/NR Atlas IX Capital, Ltd., Floating Rate Note, 1/17/19 (Cat Bond) (144A) $ 514,700 250,000 8.10 BB-/NR Atlas Reinsurance VII, Ltd., Floating Rate Note, 1/7/16 (Cat Bond) (144A) 259,050 500,000 0.02 BB+/NR Blue Danube II, Ltd., Floating Rate Note, 5/23/16 (Cat Bond) (144A) 504,600 850,000 11.08 BB-/NR Blue Danube, Ltd., Floating Rate Note, 4/10/15 (Cat Bond) (144A) 883,320 250,000 6.23 BB+/NR Blue Danube, Ltd., Floating Rate Note, 4/10/15 (Cat Bond) (144A) 254,150 350,000 2.53 BB+/NR Bosphorus 1 Re, Ltd., Floating Rate Note, 5/3/16 (Cat Bond) (144A) 349,230 1,250,000 5.29 BB-/NR Caelus Re, Ltd., Floating Rate Note, 3/7/16 (Cat Bond) (144A) 1,261,625 1,350,000 6.89 NR/NR Caelus Re, Ltd., Floating Rate Note, 4/7/17 (Cat Bond) (144A) 1,399,950 250,000 0.00 NR/NR Citrus Re, Ltd., Floating Rate Note, 4/18/17 (Cat Bond) (144A) 244,925 550,000 0.00 NR/NR Citrus Re, Ltd., Floating Rate Note, 4/24/17 (Cat Bond) (144A) 535,865 1,000,000 4.73 NR/Baa1 Combine Re, Ltd., Floating Rate Note, 1/7/15 (Cat Bond) (144A) 1,011,100 300,000 9.04 BB-/NR Compass Re, Ltd., Floating Rate Note, 1/8/15 (Cat Bond) (144A) 303,180 950,000 10.26 BB-/NR Compass Re, Ltd., Floating Rate Note, 1/8/15 (Cat Bond) (144A) 961,970 250,000 9.05 BB/NR East Lane Re V, Ltd., Floating Rate Note, 3/16/16 (Cat Bond) (144A) 265,600 250,000 7.40 BB-/NR Embarcadero Reinsurance, Ltd., Floating Rate Note, 2/13/15 (Cat Bond) (144A) 253,375 650,000 5.23 BB+/NR Embarcadero Reinsurance, Ltd., Floating Rate Note, 8/7/15 (Cat Bond) (144A) 663,130 1,050,000 5.02 BB+/NR Foundation Re III, Ltd., Floating Rate Note, 2/25/15 (Cat Bond) (144A) 1,053,360 1,200,000 7.43 NR/NR Galileo Re, Ltd., Floating Rate Note, 1/9/19 (Cat Bond) (144A) 1,223,160 900,000 4.02 BB+/NR Ibis Re II, Ltd., Floating Rate Note, 6/28/16 (Cat Bond) (144A) 904,050 1,600,000 0.00 NR/NR Kane Pl-1, Floating Rate Note, 6/12/15 1,415,840 1,004,000 0.00 NR/NR KANE-PI5, Floating Rate Note, 7/18/16 1,040,244 1,950,000 0.00 BB-/NR Kilimanjaro Re, Ltd., Floating Rate Note, 4/30/18 (Cat Bond) (144A) 1,923,480 350,000 0.00 BB-/NR Kilimanjaro Re, Ltd., Floating Rate Note, 4/30/18 (Cat Bond) (144A) 343,770 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/14 49 Schedule of Investments | 6/30/14 (continued) ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- Reinsurance -- (continued) 250,000 9.78 NR/NR Loma Reinsurance, Ltd. Bermuda, Floating Rate Note, 1/8/18 (Cat Bond) (144A) $ 255,625 1,200,000 4.03 BB/NR Longpoint Re, Ltd. III, Floating Rate Note, 5/18/16 (Cat Bond) (144A) 1,210,440 1,000,000 0.00 NR/NR Merna Reinsurance V, Ltd., Floating Rate Note, 4/7/17 (Cat Bond) (144A) 1,001,900 2,650,000 BBB/NR Montpelier Re Holdings, Ltd., 4.7%, 10/15/22 2,738,733 650,000 9.03 BB/NR Mystic Re, Ltd., Floating Rate Note, 3/12/15 (Cat Bond) (144A) 663,000 500,000 8.22 NR/Ba3 Mythen Re, Ltd., Floating Rate Note, 5/7/15 (Cat Bond) (144A) 518,300 750,000 8.72 NR/Ba3 Mythen Re, Ltd., Floating Rate Note, 5/7/15 (Cat Bond) (144A) 774,075 500,000 8.55 B+/NR Mythen Re, Ltd., Series 2012-2 Class A, Floating Rate Note, 1/5/17 (Cat Bond) (144A) 528,100 5,048,000 BBB/NR Platinum Underwriters Finance, Inc., 7.5%, 6/1/17 5,794,968 500,000 7.52 BB-/NR Queen Street IV Capital, Ltd., Floating Rate Note, 4/9/15 (Cat Bond) (144A) 506,000 250,000 8.52 BB-/NR Queen Street V Re, Ltd., Floating Rate Note, 4/9/15 (Cat Bond) (144A) 254,350 250,000 10.58 B/NR Queen Street VI Re, Ltd., Floating Rate Note, 4/9/15 (Cat Bond) (144A) 256,875 900,000 8.62 B/NR Queen Street VII Re, Ltd., Floating Rate Note, 4/8/16 (Cat Bond) (144A) 932,760 725,000 8.78 B+/NR Residential Reinsurance 2011, Ltd., Floating Rate Note, 12/6/16 (Cat Bond) (144A) 757,045 1,125,000 9.03 BB-/NR Residential Reinsurance 2011, Ltd., Floating Rate Note, 6/6/15 (Cat Bond) (144A) 1,166,962 2,800,000 4.53 BB+/NR Residential Reinsurance 2012, Ltd., Floating Rate Note, 12/6/16 (Cat Bond) (144A) 2,858,520 275,000 10.03 BB-/NR Residential Reinsurance 2012, Ltd., Floating Rate Note, 6/6/16 (Cat Bond) (144A) 301,730 800,000 8.03 BB/NR Residential Reinsurance 2012, Ltd., Floating Rate Note, 6/6/16 (Cat Bond) (144A) 868,960 250,000 9.28 B-/NR Residential Reinsurance 2013, Ltd., Floating Rate Note, 6/6/17 (Cat Bond) (144A) 260,550 800,000 0.00 BB+/NR Sanders Re, Ltd., Floating Rate Note, 5/25/18 (Cat Bond) 792,080 The accompanying notes are an integral part of these financial statements. 50 Pioneer Bond Fund | Annual Report | 6/30/14 ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- Reinsurance -- (continued) 1,200,000 3.53 BB+/NR Sanders Re, Ltd., Floating Rate Note, 5/5/17 (Cat Bond) (144A) $ 1,186,680 1,250,000 4.03 BB/NR Sanders Re, Ltd., Floating Rate Note, 5/5/17 (Cat Bond) (144A) 1,238,250 250,000 NR/NR Silverton Re, Ltd., 9/16/16 (Cat Bond) (144A) (d) 287,650 3,600,000 BBB/Baa3 Sirius International Group, Ltd., 6.375%, 3/20/17 (144A) 3,981,524 2,110,000 7.51 BB+/Ba2 Sirius International Group, Ltd., Floating Rate Note (Perpetual) (144A) 2,215,500 250,000 11.27 B-/NR Successor X, Ltd., Floating Rate Note, 11/10/15 (Cat Bond) (144A) 260,175 300,000 8.52 B+/NR Tar Heel Re, Ltd., Floating Rate Note, 5/9/16 (Cat Bond) (144A) 310,530 250,000 6.28 NR/NR Tradewynd Re, Ltd., Floating Rate Note, 1/8/15 (Cat Bond) (144A) 250,400 1,500,000 2.72 BBB-/NR Vita Capital V, Ltd., Floating Rate Note, 1/15/17 (Cat Bond) (144A) 1,524,750 500,000 2.78 BBB+/NR Vitality Re IV, Ltd., Floating Rate Note, 1/9/17 (Cat Bond) (144A) 511,200 500,000 1.78 BBB+/NR Vitality Re V, Ltd., Floating Rate Note, 1/7/19 (Cat Bond) (144A) 498,900 1,400,000 5.88 NR/NR Wilton Re Finance LLC, Floating Rate Note, 3/30/33 (144A) 1,459,500 -------------- $ 55,661,706 -------------- Total Insurance $ 110,753,890 ---------------------------------------------------------------------------------------------------- REAL ESTATE -- 1.7% Diversified REIT -- 0.3% 1,475,000 BBB-/Baa2 DCT Industrial Operating Partnership LP, 4.5%, 10/15/23 $ 1,519,592 725,000 BBB/Baa2 Digital Realty Trust LP, 5.875%, 2/1/20 805,770 1,715,000 BBB-/Baa2 WP Carey, Inc., 4.6%, 4/1/24 1,782,358 -------------- $ 4,107,720 ---------------------------------------------------------------------------------------------------- Office REIT -- 0.6% 1,093,000 BBB-/Baa2 Alexandria Real Estate Equities, Inc., 3.9%, 6/15/23 $ 1,088,405 2,670,000 BBB-/Baa2 Alexandria Real Estate Equities, Inc., 4.6%, 4/1/22 2,823,130 900,000 BBB/Baa3 BioMed Realty LP, 4.25%, 7/15/22 927,948 1,500,000 BBB-/Baa3 Corporate Office Properties LP, 3.6%, 5/15/23 1,434,318 2,100,000 BBB/Baa2 Highwoods Realty LP, 3.625%, 1/15/23 2,074,010 2,550,000 BBB/Baa2 Piedmont Operating Partnership LP, 3.4%, 6/1/23 2,424,040 -------------- $ 10,771,851 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/14 51 Schedule of Investments | 6/30/14 (continued) ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- Health Care REIT -- 0.2% 3,945,000 BBB-/Ba1 Omega Healthcare Investors, Inc., 4.95%, 4/1/24 (144A) $ 4,029,273 ---------------------------------------------------------------------------------------------------- Specialized REIT -- 0.6% 730,000 BBB-/Baa3 CubeSmart LP, 4.8%, 7/15/22 $ 785,635 1,000,000 BBB/Baa2 Health Care Real Estate Investment Trust, Inc., 4.5%, 1/15/24 1,053,668 2,425,000 BBB-/Baa3 Healthcare Realty Trust, Inc., 6.5%, 1/17/17 2,726,471 1,930,000 BBB-/Baa2 Hospitality Properties Trust, 5.0%, 8/15/22 2,041,791 2,865,000 BBB-/Baa3 Senior Housing Properties Trust, 6.75%, 4/15/20 3,309,932 -------------- $ 9,917,497 -------------- Total Real Estate $ 28,826,341 ---------------------------------------------------------------------------------------------------- SOFTWARE & SERVICES -- 0.0%+ Home Entertainment Software -- 0.0%+ 650,000 BB+/Ba2 Activision Blizzard, Inc., 6.125%, 9/15/23 (144A) $ 715,000 -------------- Total Software & Services $ 715,000 ---------------------------------------------------------------------------------------------------- TECHNOLOGY HARDWARE & EQUIPMENT -- 0.3% Communications Equipment -- 0.2% 3,485,000 AA-/A1 Cisco Systems, Inc., 3.625%, 3/4/24 $ 3,582,071 ---------------------------------------------------------------------------------------------------- Computer Hardware -- 0.1% 2,100,000 BB/Ba3 NCR Corp., 4.625%, 2/15/21 $ 2,115,750 -------------- Total Technology Hardware & Equipment $ 5,697,821 ---------------------------------------------------------------------------------------------------- SEMICONDUCTORS & SEMICONDUCTOR EQUIPMENT -- 0.2% Semiconductor Equipment -- 0.2% 3,100,000 BBB+/Baa1 KLA-Tencor Corp., 6.9%, 5/1/18 $ 3,647,342 -------------- Total Semiconductors & Semiconductor Equipment $ 3,647,342 ---------------------------------------------------------------------------------------------------- TELECOMMUNICATION SERVICES -- 1.4% Integrated Telecommunication Services -- 1.1% 469,000 B/B3 Cincinnati Bell, Inc., 8.375%, 10/15/20 $ 514,141 3,355,000 NR/A2 GTP Acquisition Partners I LLC, 4.347%, 6/15/16 (144A) 3,469,875 The accompanying notes are an integral part of these financial statements. 52 Pioneer Bond Fund | Annual Report | 6/30/14 ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- Integrated Telecommunication Services -- (continued) 786,823 NR/NR GTP Cellular Sites LLC, 3.721%, 3/15/17 (144A) $ 824,172 3,950,000 NR/A2 GTP Towers Issuer LLC, 4.436%, 2/15/15 (144A) 4,014,176 2,750,000 BBB/Baa2 Telefonica Emisiones SAU, 6.221%, 7/3/17 3,111,999 1,500,000 NR/NR Unison Ground Lease Funding LLC, 2.981%, 3/15/20 (144A) 1,512,405 3,460,000 BBB+/Baa1 Verizon Communications, Inc., 6.55%, 9/15/43 4,354,206 -------------- $ 17,800,974 ---------------------------------------------------------------------------------------------------- Wireless Telecommunication Services -- 0.3% 3,015,000 NR/A2 Crown Castle Towers LLC, 4.883%, 8/15/20 (144A) $ 3,330,309 1,625,000 NR/A2 Crown Castle Towers LLC, 6.113%, 1/15/20 (144A) 1,912,667 -------------- $ 5,242,976 -------------- Total Telecommunication Services $ 23,043,950 ---------------------------------------------------------------------------------------------------- UTILITIES -- 2.5% Electric Utilities -- 1.5% 980,000 A-/A2 Commonwealth Edison Co., 6.15%, 9/15/17 $ 1,126,104 589,337 BBB-/Baa3 Crockett Cogeneration LP, 5.869%, 3/30/25 (144A) 635,323 4,250,000 A+/Aa3 Electricite de France SA, 6.0%, 1/22/14 (144A) 4,799,359 2,150,000 5.25 BBB+/A3 Electricite de France SA, Floating Rate Note (Perpetual) (144A) 2,193,280 3,365,000 BBB/Baa2 Enel Finance International NV, 5.125%, 10/7/19 (144A) 3,788,556 2,320,000 8.75 BB+/Ba1 Enel S.p.A., Floating Rate Note, 9/24/73 (144A) 2,731,800 653,846 BB/Baa3 FPL Energy American Wind LLC, 6.639%, 6/20/23 (144A) 669,352 95,911 B-/Ba2 FPL Energy Wind Funding LLC, 6.876%, 6/27/17 (144A) 94,592 1,925,000 BB+/Baa3 Israel Electric Corp., Ltd., 7.25%, 1/15/19 (144A) 2,187,281 610,000 BB+/Baa3 Israel Electric Corp., Ltd., 9.375%, 1/28/20 (144A) 761,341 910,000 A/A2 Nevada Power Co., 6.5%, 8/1/18 1,075,965 662,691 NR/NR Orcal Geothermal, Inc., 6.21%, 12/30/20 (144A) 675,945 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/14 53 Schedule of Investments | 6/30/14 (continued) ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- Electric Utilities -- (continued) 2,690,000 BBB/Baa2 Public Service Co. of New Mexico, 7.95%, 5/15/18 $ 3,229,625 2,200,000 6.25 BBB-/Baa1 Southern California Edison Co., Floating Rate Note (Perpetual) 2,387,000 -------------- $ 26,355,523 ---------------------------------------------------------------------------------------------------- Gas Utilities -- 0.3% 2,125,000 BBB-/Baa3 DCP Midstream Operating LP, 5.6%, 4/1/44 $ 2,347,581 2,239,480 A+/A1 Nakilat, Inc., 6.267%, 12/31/33 (144A) 2,449,431 -------------- $ 4,797,012 ---------------------------------------------------------------------------------------------------- Multi-Utilities -- 0.3% 5,055,000 BBB+/A3 New York State Electric & Gas Corp., 6.15%, 12/15/17 (144A) $ 5,534,371 282,205 NR/NR Ormat Funding Corp., 8.25%, 12/30/20 280,794 -------------- $ 5,815,165 ---------------------------------------------------------------------------------------------------- Independent Power Producers & Energy Traders -- 0.4% 580,440 BBB-/NR Alta Wind Holdings LLC, 7.0%, 6/30/35 (144A) $ 643,821 1,944,463 BBB-/Baa3 Kiowa Power Partners LLC, 5.737%, 3/30/21 (144A) 2,110,755 1,016,000 BB+/Ba1 NSG Holdings LLC, 7.75%, 12/15/25 (144A) 1,097,280 2,291,212 BBB-/Baa3 Panoche Energy Center LLC, 6.885%, 7/31/29 (144A) 2,557,650 -------------- $ 6,409,506 -------------- Total Utilities $ 43,377,206 ---------------------------------------------------------------------------------------------------- TOTAL CORPORATE BONDS (Cost $531,289,546) $ 578,553,612 ---------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- 24.5% 15,000,000 AAA/Aaa Fannie Mae, 30YR Pool, 4.5%, TBA $ 16,244,535 30,000,000 AAA/Aaa Fannie Mae, 30YR Pool 5.0%, TBA 33,314,064 36,502,804 AAA/Aaa Fannie Mae, 3.0%, 7/17/14-12/1/42 36,327,218 34,356,264 NR/NR Fannie Mae, 3.5%, 7/17/14-2/1/44 35,749,106 40,819,057 AAA/Aaa Fannie Mae, 4.0%, 7/1/18-5/1/44 43,420,798 47,953,882 AAA/Aaa Fannie Mae, 4.5%, 11/1/20-12/1/43 51,974,154 17,639,366 AA+/Aaa Fannie Mae, 5.0%, 12/1/17-2/1/41 19,540,147 4,192,394 AA+/Aaa Fannie Mae, 5.5%, 9/1/17-6/1/36 4,652,250 4,050,865 AA+/Aaa Fannie Mae, 6.0%, 6/1/16-7/1/38 4,582,449 894,763 AA+/Aaa Fannie Mae, 6.5%, 1/1/15-11/1/37 1,009,892 114,806 AA+/Aaa Fannie Mae, 7.0%, 7/1/21-1/1/32 128,944 The accompanying notes are an integral part of these financial statements. 54 Pioneer Bond Fund | Annual Report | 6/30/14 ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- U.S. Government and Agency Obligations -- (continued) 1,002 AA+/Aaa Fannie Mae, 7.5%, 8/1/20 $ 1,085 16,788 AAA/Aaa Fannie Mae, 8.0%, 4/1/20-5/1/31 19,261 6,551,694 NR/NR Federal Home Loan Mortgage Corp., 3.5%, 11/1/28-8/1/43 6,810,621 13,120,251 NR/NR Federal Home Loan Mortgage Corp., 4.0%, 1/1/44-5/1/44 13,918,271 20,705,651 AA+/Aaa Federal Home Loan Mortgage Corp., 4.5%, 3/1/20-11/1/43 22,411,245 3,587,555 AA+/Aaa Federal Home Loan Mortgage Corp., 5.0%, 10/1/20-10/1/38 3,933,363 1,457,209 AA+/Aaa Federal Home Loan Mortgage Corp., 5.5%, 12/1/18-11/1/35 1,612,720 3,549,872 AA+/Aaa Federal Home Loan Mortgage Corp., 6.0%, 5/1/17-12/1/36 4,007,440 314,513 AA+/Aaa Federal Home Loan Mortgage Corp., 6.5%, 11/1/30-4/1/34 354,450 391,251 AA+/Aaa Federal Home Loan Mortgage Corp., 7.0%, 8/1/22-11/1/30 430,182 1,597,399 AA+/Aaa Federal National Mortgage Association, 5.0%, 8/1/40 1,775,686 15,000,000 NR/NR Government National Mortgage Association I, 4.0%, 7/21/14 16,021,875 7,413,687 NR/NR Government National Mortgage Association I, 4.5%, 7/15/33-8/15/41 8,102,053 1,478,888 AA+/Aaa Government National Mortgage Association I, 5.0%, 10/15/18-4/15/35 1,629,829 6,030,922 AA+/Aaa Government National Mortgage Association I, 5.5%, 10/15/17-10/15/35 6,693,305 6,597,021 AA+/Aaa Government National Mortgage Association I, 6.0%, 3/15/17-10/15/36 7,550,099 3,259,854 AAA/Aaa Government National Mortgage Association I, 6.5%, 1/15/29-7/15/35 3,755,910 556,421 AA+/Aaa Government National Mortgage Association I, 7.0%, 8/15/28-5/15/32 635,290 105,117 AAA/Aaa Government National Mortgage Association I, 7.5%, 2/15/26-12/15/31 116,150 2,470 AA+/Aaa Government National Mortgage Association I, 7.75%, 2/15/30 2,538 3,739,371 AA+/Aaa Government National Mortgage Association II, 4.5%, 12/20/34-9/20/41 4,095,623 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/14 55 Schedule of Investments | 6/30/14 (continued) ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- U.S. Government and Agency Obligations -- (continued) 1,258,305 AA+/Aaa Government National Mortgage Association II, 5.5%, 10/20/19-4/20/34 $ 1,377,067 47,653 AAA/Aaa Government National Mortgage Association II, 6.5%, 2/20/29-4/20/29 55,477 106,118 AAA/Aaa Government National Mortgage Association II, 7.0%, 1/20/29 123,321 100,956 AA+/Aaa Government National Mortgage Association II, 7.0%, 11/20/28 117,305 3,036 AA+/Aaa Government National Mortgage Association II, 7.0%, 12/20/30 3,580 10,375,000 NR/Aaa U.S. Treasury Bonds, 2.875%, 5/15/43 9,480,156 2,000,000 NR/Aaa U.S. Treasury Bonds, 3.125%, 2/15/43 1,925,312 7,620,000 AA+/Aaa U.S. Treasury Bonds, 4.25%, 5/15/39 8,947,549 1,365,000 AA+/Aaa U.S. Treasury Bonds, 4.375%, 11/15/39 1,634,588 4,650,000 AA+/Aaa U.S. Treasury Bonds, 4.375%, 2/15/38 5,551,663 2,000,000 AA+/Aaa U.S. Treasury Bonds, 4.375%, 5/15/40 2,398,438 8,435,000 AA+/Aaa U.S. Treasury Bonds, 4.5%, 5/15/38 10,256,437 9,068,000 AA+/Aaa U.S. Treasury Bonds, 4.5%, 8/15/39 11,053,040 4,000,000 AA+/Aaa U.S. Treasury Bonds, 4.625%, 2/15/40 4,974,376 4,000,000 AA+/Aaa U.S. Treasury Bonds, 5.375%, 2/15/31 5,251,876 6,000,000 NR/Aaa U.S. Treasury Notes, 2.75%, 2/15/24 6,136,404 -------------- $ 420,107,142 ---------------------------------------------------------------------------------------------------- TOTAL U.S. GOVERNMENT AND AGENCY OBLIGATIONS (Cost $404,780,763) $ 420,107,142 ---------------------------------------------------------------------------------------------------- MUNICIPAL BONDS -- 4.2% Municipal Airport -- 0.1% 1,000,000 BBB/Baa1 Indianapolis Airport Authority, 5.1%, 1/15/17 $ 1,102,170 ---------------------------------------------------------------------------------------------------- Municipal Development -- 0.9% 2,925,000 AA-/Aa3 California Statewide Communities Development Authority, 6.0%, 8/15/42 $ 3,506,636 2,350,000 BBB/Baa3 Louisiana Local Government Environmental Facilities & Community Development Authority, 6.5%, 11/1/35 2,698,458 4,500,000 AA/A2 New Jersey Economic Development Authority, 2/15/18 (d) 4,142,205 2,560,000 BBB/Baa1 Parish of St. John the Baptist Louisiana, 5.125%, 6/1/37 2,681,677 2,310,000 BBB/Baa2 Selma Industrial Development Board, 5.8%, 5/1/34 2,571,376 -------------- $ 15,600,352 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 56 Pioneer Bond Fund | Annual Report | 6/30/14 ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- Municipal Education -- 0.0%+ 525,000 AA+/Aaa Amherst College, 3.794%, 11/1/42 $ 479,449 ---------------------------------------------------------------------------------------------------- Municipal General -- 0.9% 4,075,000 AA/A2 JobsOhio Beverage System, 3.985%, 1/1/29 $ 4,108,048 1,035,000 AA/A2 JobsOhio Beverage System, 4.532%, 1/1/35 1,071,122 2,750,000 A/A2 New Jersey Transportation Trust Fund Authority, 5.5%, 6/15/41 3,051,180 2,400,000 AAA/Aa1 New York City Transitional Finance Authority Future Tax Secured Revenue, 5.0%, 11/1/33 2,729,352 1,050,000 BBB/A3 Texas Municipal Gas Acquisition & Supply Corp. III, 5.0%, 12/15/30 1,120,822 2,100,000 BBB/A3 Texas Municipal Gas Acquisition & Supply Corp. III, 5.0%, 12/15/31 2,229,276 -------------- $ 14,309,800 ---------------------------------------------------------------------------------------------------- Higher Municipal Education -- 1.7% 1,025,000 A+/NR Baylor University, 4.313%, 3/1/42 $ 994,404 1,980,000 AAA/Aaa California Educational Facilities Authority, 5.0%, 6/1/43 2,517,412 1,500,000 AAA/Aaa Houston Higher Education Finance Corp., 5.0%, 5/15/40 1,675,470 1,200,000 AAA/Aaa Massachusetts Development Finance Agency, 5.0%, 10/15/40 1,369,188 6,500,000 AAA/Aaa Massachusetts Health & Educational Facilities Authority, 5.5%, 11/15/36 7,533,370 1,425,000 AAA/Aaa Massachusetts Health & Educational Facilities Authority, 5.5%, 7/1/32 1,894,138 1,000,000 AAA/Aaa Massachusetts Health & Educational Facilities Authority, 6.0%, 7/1/36 1,181,040 1,100,000 AAA/Aaa Massachusetts Institute of Technology, 5.6%, 7/1/11 1,380,372 1,600,000 AA/Aa1 New York State Dormitory Authority Series A, 5.0%, 7/1/40 1,809,568 800,000 AAA/Aaa Permanent University Fund, 5.0%, 7/1/30 958,128 3,095,000 AAA/Aaa President and Fellows of Harvard College, 6.3%, 10/1/37 3,404,314 1,900,000 A+/A1 The George Washington University, 1.827%, 9/15/17 1,897,158 525,000 AAA/Aaa The University of Texas System, 5.0%, 8/15/43 586,945 2,600,000 AA/Aa2 University of California, 3.38%, 5/15/28 2,453,438 -------------- $ 29,654,945 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/14 57 Schedule of Investments | 6/30/14 (continued) ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- Municipal Medical -- 0.2% 325,000 AA-/A1 Massachusetts Development Finance Agency, 5.25%, 4/1/37 $ 356,262 550,000 AA-/A1 Massachusetts Development Finance Agency, 5.375%, 4/1/41 604,054 1,765,000 AA-/Aa2 Ohio Higher Educational Facility Commission, 5.0%, 1/1/42 1,935,128 -------------- $ 2,895,444 ---------------------------------------------------------------------------------------------------- Municipal Pollution -- 0.3% 995,000 A-/Baa1 County of Sweetwater Wyoming, 5.6%, 12/1/35 $ 1,017,686 3,965,000 5.95 BBB/NR Port Freeport Texas, Floating Rate Note, 5/15/33 4,345,362 -------------- $ 5,363,048 ---------------------------------------------------------------------------------------------------- Municipal Transportation -- 0.1% 600,000 AA-/Aa3 Port Authority of New York & New Jersey, 4.458%, 10/1/62 $ 611,562 1,000,000 AAA/Aaa Texas Transportation Commission State Highway Fund, 5.0%, 4/1/33 1,165,220 -------------- $ 1,776,782 ---------------------------------------------------------------------------------------------------- Municipal Obligation -- 0.0%+ 560,000 AA+/Aa1 State of Washington, 3.0%, 7/1/28 $ 558,589 ---------------------------------------------------------------------------------------------------- TOTAL MUNICIPAL BONDS (Cost $65,916,235) $ 71,740,579 ---------------------------------------------------------------------------------------------------- SENIOR FLOATING RATE LOAN INTERESTS -- 4.1%** ENERGY -- 0.2% Integrated Oil & Gas -- 0.1% 1,280,173 4.50 BBB/Baa2 Glenn Pool Oil & Gas Trust, Term Loan, 5/2/16 $ 1,289,775 ---------------------------------------------------------------------------------------------------- Oil & Gas Refining & Marketing -- 0.1% 1,431,555 3.75 BB/Ba2 Pilot Travel Centers LLC, Refinancing Tranche B Term Loan, 3/30/18 $ 1,436,011 -------------- Total Energy $ 2,725,786 ---------------------------------------------------------------------------------------------------- MATERIALS -- 0.2% Commodity Chemicals -- 0.1% 772,669 4.00 BBB-/Ba2 Tronox Pigments BV, New Term Loan, 3/19/20 $ 774,987 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 58 Pioneer Bond Fund | Annual Report | 6/30/14 ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- Specialty Chemicals -- 0.1% 801,537 3.50 BB+/Ba1 Chemtura Corp., New Term Loan, 8/29/16 $ 804,042 254,694 2.69 BB+/Ba2 Huntsman International LLC, Extended Term B Loan, 4/19/17 254,438 239,945 1.23 BBB-/Ba2 WR Grace & Co., Delayed Draw Term Loan, 1/23/21 239,765 670,166 3.00 BBB-/Ba2 WR Grace & Co., U.S. Term Loan, 1/23/21 669,664 -------------- $ 1,967,909 ---------------------------------------------------------------------------------------------------- Metal & Glass Containers -- 0.0%+ 418,625 4.50 B/B1 BWAY Holding Co., Initial Term Loan, 8/31/17 $ 420,718 -------------- Total Materials $ 3,163,614 ---------------------------------------------------------------------------------------------------- CAPITAL GOODS -- 0.3% Aerospace & Defense -- 0.3% 647,771 6.50 B+/B1 TASC, Inc.,/VA, 1st Lien Term Loan B, 5/12/20 $ 638,459 1,344,309 5.00 B/B2 DAE Aviation Holdings, Inc., Replacement Tranche B-1 Loan, 11/2/18 1,360,272 1,303,500 3.75 BBB-/Ba2 DigitalGlobe, Inc., Term Loan, 1/25/20 1,308,177 493,569 6.25 B+/Ba2 DynCorp International, Inc., Term Loan, 7/7/16 495,496 635,375 3.25 BB+/Ba1 Spirit AeroSystems, Inc., Term Loan B, 9/30/20 634,482 609,421 5.00 B/NR Standard Aero, Ltd., Replacement Tranche B-2 Loan, 11/2/18 617,039 -------------- $ 5,053,925 ---------------------------------------------------------------------------------------------------- Trading Companies & Distributors -- 0.0%+ 590,405 3.75 BB/Ba3 WESCO Distribution, Inc., Tranche B-1 Loan, 12/12/19 $ 591,660 -------------- Total Capital Goods $ 5,645,585 ---------------------------------------------------------------------------------------------------- AUTOMOBILES & COMPONENTS -- 0.6% Auto Parts & Equipment -- 0.2% 1,142,918 3.75 B+/Ba3 Allison Transmission, Inc., Term B-3 Loan, 8/23/19 $ 1,147,376 646,298 3.75 BB/Ba2 Gates Investments LLC, Term B-2 Loan, 9/29/16 647,752 828,179 5.50 NR/NR TI Group Automotive Systems LLC, Additional Term Loan, 3/27/19 832,310 -------------- $ 2,627,438 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/14 59 Schedule of Investments | 6/30/14 (continued) ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- Tires & Rubber -- 0.2% 4,190,000 4.75 BB/Ba1 The Goodyear Tire & Rubber Co., Term Loan (Second Lien), 3/27/19 $ 4,221,391 ---------------------------------------------------------------------------------------------------- Automobile Manufacturers -- 0.2% 3,797,550 3.50 BB+/Ba1 Chrysler Group LLC, Term Loan B, 5/24/17 $ 3,817,218 -------------- Total Automobiles & Components $ 10,666,047 ---------------------------------------------------------------------------------------------------- CONSUMER DURABLES & APPAREL -- 0.0%+ Apparel, Accessories & Luxury Goods -- 0.0%+ 609,363 3.25 BBB-/Ba1 PVH Corp., Tranche B Term Loan, 12/19/19 $ 614,441 -------------- Total Consumer Durables & Apparel $ 614,441 ---------------------------------------------------------------------------------------------------- CONSUMER SERVICES -- 0.1% Casinos & Gaming -- 0.1% 894,913 3.75 BB+/Ba2 Pinnacle Entertainment, Inc., Tranche B-2 Term Loan, 8/13/20 $ 897,520 ---------------------------------------------------------------------------------------------------- Restaurants -- 0.0%+ 481,425 3.75 BB/Ba3 Burger King Corp., Tranche B Term Loan (2012), 9/28/19 $ 483,797 -------------- Total Consumer Services $ 1,381,317 ---------------------------------------------------------------------------------------------------- MEDIA -- 0.5% Advertising -- 0.1% 1,070,296 6.75 B/NR Affinion Group, Inc., Tranche B Term Loan, 4/30/18 $ 1,076,735 ---------------------------------------------------------------------------------------------------- Broadcasting -- 0.1% 2,277,434 4.00 B+/NR Univision Communications, Inc., Replacement First-Lien Term Loan, 3/1/20 $ 2,278,502 ---------------------------------------------------------------------------------------------------- Cable & Satellite -- 0.1% 1,707,750 3.00 BB+/Baa3 Charter Communications Operating LLC, Term F Loan, 1/1/21 $ 1,685,336 161,107 4.75 B/Ba3 WideOpenWest Finance LLC, Term B Loan, 4/1/19 161,976 -------------- $ 1,847,312 ---------------------------------------------------------------------------------------------------- Movies & Entertainment -- 0.1% 510,262 3.75 NR/Baa3 Cinedigm Digital Funding I LLC, Term Loan, 2/28/18 $ 511,219 1,414,313 3.50 BB/Ba2 Live Nation Entertainment, Inc., Term B-1 Loan, 8/17/20 1,416,375 -------------- $ 1,927,594 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 60 Pioneer Bond Fund | Annual Report | 6/30/14 ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- Publishing -- 0.1% 750,547 4.75 B+/B2 Interactive Data Corp., 1ST Lien Term Loan, 4/24/21 $ 757,935 -------------- Total Media $ 7,888,078 ---------------------------------------------------------------------------------------------------- FOOD, BEVERAGE & TOBACCO -- 0.1% Agricultural Products -- 0.1% 1,251,863 3.25 BBB-/Ba2 Darling International, Inc., Term B USD Loan, 12/19/20 $ 1,253,427 ---------------------------------------------------------------------------------------------------- Packaged Foods & Meats -- 0.0%+ 23,700 3.25 BB-/Ba3 Pinnacle Foods Finance LLC, New Term Loan G, 4/29/20 $ 23,619 -------------- Total Food, Beverage & Tobacco $ 1,277,046 ---------------------------------------------------------------------------------------------------- HOUSEHOLD & PERSONAL PRODUCTS -- 0.1% Household Products -- 0.0%+ 160,388 4.50 B-/B2 WASH Multifamily Laundry Systems LLC, U.S. Term Loan, 2/21/19 $ 160,889 ---------------------------------------------------------------------------------------------------- Personal Products -- 0.1% 1,433,078 4.75 B/B1 Federal Mogul Corp., 1st Lien Term Loan, 4/15/21 $ 1,435,467 861,429 3.50 BB-/Ba3 NBTY, Inc., Term B-2 Loan, 10/1/17 863,986 -------------- $ 2,299,453 -------------- Total Household & Personal Products $ 2,460,342 ---------------------------------------------------------------------------------------------------- HEALTH CARE EQUIPMENT & SERVICES -- 0.6% Health Care Equipment -- 0.0%+ 558,074 3.25 BBB-/Ba2 Hologic, Inc., Refinancing Tranche B Term Loan, 8/1/19 $ 558,423 ---------------------------------------------------------------------------------------------------- Health Care Supplies -- 0.1% 2,144,857 5.00 B+/B1 Immucor, Inc., Term B-2 Loan, 8/19/18 $ 2,160,275 ---------------------------------------------------------------------------------------------------- Health Care Services -- 0.1% 253,678 3.75 BB/Ba1 Davita Healthcare Partners, Inc., 1st Lien Term Loan, 6/19/21 $ 255,196 503,819 6.75 B+/B1 Ardent Medical Services, Inc., 1st Lien Term Loan, 5/2/18 507,126 -------------- $ 762,322 ---------------------------------------------------------------------------------------------------- Health Care Facilities -- 0.4% 597,145 3.48 BB/Ba2 CHS, 2017 Term E Loan, 1/25/17 $ 599,289 3,204,578 4.25 BB/Ba2 CHS, 2021 Term D Loan, 1/27/21 3,228,363 742,291 2.98 BB/Ba3 HCA, Inc., Tranche B-4 Term Loan, 5/1/18 744,146 1,780,161 2.90 BB/Ba3 HCA, Inc., Tranche B-5 Term Loan, 3/31/17 1,786,359 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/14 61 Schedule of Investments | 6/30/14 (continued) ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- Health Care Facilities -- (continued) 704,687 2.40 BB+/Ba2 Universal Health Services, Inc., Tranche B-1 Term Loan, 11/15/16 $ 708,064 -------------- $ 7,066,221 ---------------------------------------------------------------------------------------------------- Health Care Technology -- 0.0%+ 456,097 3.50 BB-/Ba3 IMS Health, Inc., Term B Dollar Loan, 3/17/21 $ 454,045 -------------- Total Health Care Equipment & Services $ 11,001,286 ---------------------------------------------------------------------------------------------------- PHARMACEUTICALS, BIOTECHNOLOGY & LIFE SCIENCES -- 0.2% Pharmaceuticals -- 0.2% 389,025 3.23 BB/Ba1 Grifols Worldwide Operations USA, Inc., U.S. Tranche B Term Loam, 4/1/21 $ 389,050 1,665,299 3.25 BBB-/Baa2 RPI Finance Trust, Term B-2 Term Loan, 5/9/18 1,669,662 614,063 3.75 BB/Ba1 Valeant Pharmaceuticals International, Inc., Series C-2 Tranche B Term Loan, 12/11/19 614,523 -------------- $ 2,673,235 ---------------------------------------------------------------------------------------------------- Life Sciences Tools & Services -- 0.0%+ 899,887 4.50 BB-/Ba3 Catalent Pharma Solutions, Inc., 1st Lien Term Loan 5/8/21 $ 906,355 -------------- Total Pharmaceuticals, Biotechnology & Life Sciences $ 3,579,590 ---------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 0.1% Other Diversified Financial Services -- 0.1% 999,288 5.25 BB/Ba3 WorldPay, Facility B2A Term Loan, 11/20/19 $ 1,010,530 -------------- Total Diversified Financials $ 1,010,530 ---------------------------------------------------------------------------------------------------- INSURANCE -- 0.4% Insurance Brokers -- 0.4% 6,240,331 4.25 NR/B1 USI Insurance Services LLC, Term B Loan, 12/30/19 $ 6,257,230 -------------- Total Insurance $ 6,257,230 ---------------------------------------------------------------------------------------------------- SOFTWARE & SERVICES -- 0.1% IT Consulting & Other Services -- 0.1% 953,650 3.90 BB/Ba3 SunGard Data Systems, Inc., Tranche C Term Loan, 2/28/17 $ 957,028 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 62 Pioneer Bond Fund | Annual Report | 6/30/14 ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- Application Software -- 0.0%+ 372,623 2.90 BB+/Baa3 Nuance Communications, Inc., Term C Loan, 8/7/19 $ 370,993 -------------- Total Software & Services $ 1,328,021 ---------------------------------------------------------------------------------------------------- TECHNOLOGY HARDWARE & EQUIPMENT -- 0.0%+ Communications Equipment -- 0.0%+ 329,000 2.73 BB+/Ba2 Commscope, Inc., Tranche 3 Term Loan, 1/21/17 $ 329,206 493,500 3.25 BB+/Ba2 Commscope, Inc., Tranche 4 Term Loan, 1/14/18 495,351 -------------- $ 824,557 -------------- Total Technology Hardware & Equipment $ 824,557 ---------------------------------------------------------------------------------------------------- SEMICONDUCTORS & SEMICONDUCTOR EQUIPMENT -- 0.2% Semiconductor Equipment -- 0.2% 3,048,411 4.50 NR/B1 Aeroflex, Inc., Tranche B-1 Term Loan, 11/9/19 $ 3,063,653 ---------------------------------------------------------------------------------------------------- Semiconductors -- 0.0%+ 395,014 3.25 BB+/Ba2 Microsemi Corp., Term Loan (First Lien), 3/14/21 $ 393,657 -------------- Total Semiconductors & Semiconductor Equipment $ 3,457,310 ---------------------------------------------------------------------------------------------------- TELECOMMUNICATION SERVICES -- 0.1% Integrated Telecommunication Services -- 0.1% 1,940,338 4.00 BB-/Ba3 Cincinnati Bell, Inc., Tranche B Term Loan, 9/10/20 $ 1,942,965 -------------- Total Telecommunication Services $ 1,942,965 ---------------------------------------------------------------------------------------------------- UTILITIES -- 0.3% Electric Utilities -- 0.2% 992,440 1.50 NR/NR Texas Competitive Electric Holdings Co., LLC, DIP Delay Draw Term Loan, 5/5/16 $ 996,782 1,285,660 3.75 BB+/Baa3 Texas Competitive Electric Holdings Co., LLC, DIP Delayed Draw Term Loan (2014), 5/5/16 1,293,294 -------------- $ 2,290,076 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/14 63 Schedule of Investments | 6/30/14 (continued) ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- Independent Power Producers & Energy Traders -- 0.1% 1,329,200 2.75 BB+/Baa3 NRG Energy, Inc., Term Loan (2013), 7/1/18 $ 1,327,910 784,624 3.75 BB+/Ba1 NSG Holdings LLC, New Term Loan, 12/11/19 785,604 $ 2,113,514 -------------- Total Utilities $ 4,403,590 ---------------------------------------------------------------------------------------------------- TOTAL SENIOR FLOATING RATE LOAN INTERESTS (Cost $68,131,570) $ 69,627,335 ---------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------- Shares ---------------------------------------------------------------------------------------------------- RIGHTS / WARRANTS -- 0.0%+ AUTOMOBILES & COMPONENTS -- 0.0%+ Auto Parts & Equipment -- 0.0%+ 247 Lear Corp., 11/9/14 $ 43,771 ---------------------------------------------------------------------------------------------------- TOTAL RIGHTS / WARRANTS (Cost $13,341) $ 43,771 ---------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------- Principal Amount ($) ---------------------------------------------------------------------------------------------------- TEMPORARY CASH INVESTMENTS -- 3.8% Repurchase Agreements -- 3.8% 50,000,000 Royal Bank of Canada, 0.08%, dated 6/30/14, repurchase price of $50,000,000 plus accrued interest on 7/1/14 collateralized by the following: $32,705,533 Federal National Mortgage Association, 3.00-5.00%, 6/1/27-5/1/44 $14,567,502 Freddie Mac Giant, 3.50-4.00%, 9/1/42-6/1/44 $3,726,965 Government National Mortgage Association, 6.00%, 5/20/44 $ 50,000,000 15,000,000 TD Securities USA LLC, 0.09%, dated 6/30/14, repurchase price of $15,000,000 plus accrued interest on 7/1/14 collateralized by $15,300,000 Federal National Mortgage Association, 3.50-4.00%, 9/1/26-10/1/33 15,000,000 -------------- $ 65,000,000 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 64 Pioneer Bond Fund | Annual Report | 6/30/14 ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- TOTAL TEMPORARY CASH INVESTMENTS (Cost $65,000,000) $ 65,000,000 ---------------------------------------------------------------------------------------------------- TOTAL INVESTMENT IN SECURITIES -- 97.7% (Cost $1,596,709,189) (a) $1,676,127,883 ---------------------------------------------------------------------------------------------------- OTHER ASSETS & LIABILITIES -- 2.3% $ 38,710,812 ---------------------------------------------------------------------------------------------------- TOTAL NET ASSETS -- 100.0% $1,714,838,695 ==================================================================================================== TBA To Be Announced. NR Not rated by either S&P or Moody's. REIT Real Estate Investment Trust. + Rounds to less than 0.01%. (Perpetual) Security with no stated maturity date. (Cat Bond) Catastrophe bond is a high-yield debt instrument that is usually insurance linked and used to raise money in case of a catastrophe. (Step) Stepup bond issued with an initial coupon rate which converts to a higher rate at a later date. (144A) Security is exempt from registration under Rule 144A of the Securities Act of 1933. Such securities may be resold normally to qualified institutional buyers in a transaction exempt from registration. At June 30, 2014, the value of these securities amounted to $391,494,294 or 22.8% of total net assets. ** Senior floating rate loan interests in which the Fund invests generally pay interest at rates that are periodically redetermined by reference to a base lending rate plus a premium. These base lending rates are generally (i) the lending rate offered by one or more major European banks, such as LIBOR (London InterBank Offered Rate), (ii) the prime rate offered by one or more major U.S. banks, (iii) the rate of a 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, 2014, the net unrealized appreciation on investments based on cost for federal income tax purposes of $1,599,359,040 was as follows: Aggregate gross unrealized appreciation for all investments in which there is an excess of value over tax cost $83,623,494 Aggregate gross unrealized depreciation for all investments in which there is an excess of tax cost over value (6,854,651) ----------- Net unrealized appreciation $76,768,843 =========== The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/14 65 Schedule of Investments | 6/30/14 (continued) (b) Debt obligation with a variable interest rate. Rate shown is rate at end of period. (c) Security represents the interest only portion of payments on a pool of underlying mortgages or mortgage-backed securities. (d) Security issued with a zero coupon. Income is earned through accretion of discount. (e) Security is valued using fair value methods (other than prices supplied by independent pricing services or broker-dealers). See Notes to Financial Statements -- Note 1A. Purchases and sales of securities (excluding temporary cash investments) for the year ended June 30, 2014 were as follows: -------------------------------------------------------------------- Purchases Sales -------------------------------------------------------------------- Long-Term U.S. Government Securities 397,141,662 200,117,941 Other Long-Term Securities 344,205,591 423,447,874 CREDIT DEFAULT SWAP AGREEMENTS -- BUY PROTECTION ------------------------------------------------------------------------------------------------------------ Premiums Net Unrealized Notional Obligation Expiration Received Appreciation Principal ($) Counterparty Entity/Index Coupon Date (Paid) (Depreciation) ------------------------------------------------------------------------------------------------------------ (8,100,000) JP Morgan MARKIT CME North Securities LLC America High Yield 5.00% 6/20/19 $(613,955) $(99,974) ------------------------------------------------------------------------------------------------------------ $(613,955) $(99,974) ------------------------------------------------------------------------------------------------------------ Various inputs are used in determining the value of the Fund's investments. These inputs are summarized in the three broad levels listed below. Level 1 -- quoted prices in active markets for identical securities. Level 2 -- other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.) See Notes to Financial Statements -- Note 1A. Level 3 -- significant unobservable inputs (including the Fund's own assumptions in determining fair value of investments) See Notes to Financial Statements -- Note 1A. Generally, equity securities are categorized as Level 1, fixed income securities and senior loans as Level 2 and securities valued using fair value methods (other than prices supplied by independent pricing services or broker-dealers) as Level 3. See Notes to Financial Statements -- Note 1A. The accompanying notes are an integral part of these financial statements. 66 Pioneer Bond Fund | Annual Report | 6/30/14 The following is a summary of the inputs used as of June 30, 2014, in valuing the Fund's assets: ---------------------------------------------------------------------------------------------------- Level 1 Level 2 Level 3 Total ---------------------------------------------------------------------------------------------------- Convertible Corporate Bonds $ -- $ 5,873,766 $ -- $ 5,873,766 Preferred Stocks Banks Regional Banks -- 2,914,626 -- 2,914,626 Insurance Life & Health Insurance -- 3,782,526 -- 3,782,526 Reinsurance -- -- 2,081,052 2,081,052 All Other Preferred Stocks 34,907,389 34,907,389 Convertible Preferred Stocks 6,810,540 -- -- 6,810,540 Asset Backed Securities -- 112,940,037 -- 112,940,037 Collateralized Mortgage Obligations -- 301,745,508 -- 301,745,508 Corporate Bonds Diversified Financials Other Diversified Financial Services -- -- 934,199 934,199 Insurance Property & Casualty Insurance -- -- 2,121,510 2,121,510 Reinsurance 1,327,894 1,327,894 All Other Corporate Bonds -- 574,170,009 -- 574,170,009 U.S. Government Agency Obligations -- 420,107,142 -- 420,107,142 Municipal Bonds -- 71,740,579 -- 71,740,579 Senior Floating Rate Loan Interests -- 69,627,335 -- 69,627,335 Rights/Warrants 43,771 -- -- 43,771 Repurchase Agreements -- 65,000,000 -- 65,000,000 ---------------------------------------------------------------------------------------------------- Total $ 41,761,700 $ 1,627,901,528 $ 6,464,655 $1,676,127,883 ==================================================================================================== Other Financial Instruments Net unrealized Appreciation on Futures Contracts $ 958,062 $ -- $ -- $ 958,062 Net unrealized Depreciation on Swap Contracts -- (99,974) -- (99,974) ---------------------------------------------------------------------------------------------------- Total Other Financial Instruments $ 958,062 $ (99,974) $ -- $ 858,088 ==================================================================================================== The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/14 67 Schedule of Investments | 6/30/14 (continued) Following is a reconciliation of assets using significant unobservable inputs (Level 3): ---------------------------------------------------------------------------------------------------- Preferred Corporate Stocks Bonds Total ---------------------------------------------------------------------------------------------------- Balance as of 6/30/13 $ 2,241,535 $ 787,549 $ 3,029,084 Realized gain (loss)(1) 96,739 -- 96,739 Change in unrealized appreciation (depreciation)(2) 120,718 242,054 362,772 Purchases 1,497,900 3,354,000 4,851,900 Sales (1,875,840) -- (1,875,840) Transfers in and out of Level 3** -- -- -- ---------------------------------------------------------------------------------------------------- Balance as of 6/30/14 $ 2,081,052 $4,383,603 $ 6,464,655 ==================================================================================================== (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, 2014, there were no transfers between Levels 1, 2 and 3. Net change in unrealized appreciation (depreciation) of investments still held as of 6/30/14 $ 362,772 ----------- The accompanying notes are an integral part of these financial statements. 68 Pioneer Bond Fund | Annual Report | 6/30/14 68 Statement of Assets and Liabilities | 6/30/14 ASSETS: Investment in securities (cost $1,596,709,189) $1,676,127,883 Cash 76,727,368 Futures Collateral 2,298,450 Receivables -- Investment securities sold 2,735,636 Fund shares sold 34,936,721 Interest 11,003,259 Dividends 223,478 Due from Pioneer Investment Management, Inc. 131,324 Net unrealized appreciation on futures contracts 958,062 Other assets 67,082 -------------------------------------------------------------------------------------- Total assets $1,805,209,263 ====================================================================================== LIABILITIES: Payables -- Investment securities purchased $ 86,143,558 Fund shares repurchased 2,187,283 Dividends 605,287 Variation margin 178,701 Due to affiliates 415,109 Accrued expenses 126,701 Credit default swaps, premiums received 613,955 Net unrealized depreciation on swap contracts 99,974 -------------------------------------------------------------------------------------- Total liabilities $ 90,370,568 ====================================================================================== NET ASSETS: Paid-in capital $1,643,487,624 Distributions in excess of net investment income (1,372,548) Accumulated net realized loss on investments, swap contracts and futures contracts (7,553,163) Net unrealized appreciation on investments 79,418,694 Net unrealized appreciation on futures contracts 958,062 Net unrealized depreciation on swap contracts (99,974) -------------------------------------------------------------------------------------- Total net assets $1,714,838,695 ====================================================================================== NET ASSET VALUE PER SHARE: (No par value, unlimited number of shares authorized) Class A (based on $706,961,729/71,549,134 shares) $ 9.88 Class B (based on $5,361,804/545,952 shares) $ 9.82 Class C (based on $73,224,472/7,493,528 shares) $ 9.77 Class K (based on $4,397,536/445,425 shares) $ 9.87 Class R (based on $48,264,026/4,841,147 shares) $ 9.97 Class Y (based on $871,801,321/89,060,424 shares) $ 9.79 Class Z (based on $4,827,807/487,524 shares) $ 9.90 MAXIMUM OFFERING PRICE: Class A ($9.88 / 95.5% ) $ 10.35 ====================================================================================== The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/14 69 Statement of Operations For the Year Ended 6/30/14 INVESTMENT INCOME: Interest $65,039,791 Dividends 2,623,365 -------------------------------------------------------------------------------------- Total investment income $67,663,156 ====================================================================================== EXPENSES: Management fees $ 7,446,008 Transfer agent fees Class A 285,144 Class B 32,392 Class C 37,042 Class R 8,950 Class Y 56,331 Class Z 4,726 Distribution fees Class A 1,493,016 Class B 68,226 Class C 770,525 Class R 183,421 Shareholder communications expense 1,936,983 Administrative reimbursements 487,793 Custodian fees 107,042 Registration fees 129,955 Professional fees 118,144 Printing expense 72,614 Fees and expenses of nonaffiliated Trustees 56,271 Miscellaneous 145,880 -------------------------------------------------------------------------------------- Total expenses $13,440,463 Less fees waived and expenses reimbursed by Pioneer Investment Management, Inc. (961,111) -------------------------------------------------------------------------------------- Net expenses $12,479,352 -------------------------------------------------------------------------------------- Net investment income $55,183,804 -------------------------------------------------------------------------------------- REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS, FUTURES CONTRACTS AND SWAP CONTRACTS: Net realized gain (loss) on: Investments $16,450,006 Futures contracts (2,515,629) Swap contracts 109,554 $14,043,931 -------------------------------------------------------------------------------------- Change in net unrealized appreciation (depreciation) on: Investments $23,390,148 Futures contracts 601,938 Swap contracts (295,480) $23,696,606 -------------------------------------------------------------------------------------- Net gain on investments, futures contracts and swap contracts $37,740,537 -------------------------------------------------------------------------------------- Net increase in net assets resulting from operations $92,924,341 ====================================================================================== The accompanying notes are an integral part of these financial statements. 70 Pioneer Bond Fund | Annual Report | 6/30/14 Statements of Changes in Net Assets -------------------------------------------------------------------------------------------- Year Ended Year Ended 6/30/14 6/30/13 -------------------------------------------------------------------------------------------- FROM OPERATIONS: Net investment income $ 55,183,804 $ 60,853,512 Net realized gain (loss) on investments, futures contracts and swap contracts 14,043,931 (151,123) Change in net unrealized appreciation (depreciation) on investments, futures contracts and swap contracts 23,696,606 (14,758,493) -------------------------------------------------------------------------------------------- Net increase in net assets resulting from operations $ 92,924,341 $ 45,943,896 -------------------------------------------------------------------------------------------- DISTRIBUTIONS TO SHAREOWNERS: Net investment income: Class A ($0.38 and $0.37 per share, respectively) $ (22,667,902) $ (19,971,054) Class B ($0.27 and $0.27 per share, respectively) (193,002) (315,610) Class C ($0.29 and $0.29 per share, respectively) (2,298,637) (2,893,417) Class K ($0.40 and $0.21 per share, respectively) (38,942) (215) Class R ($0.34 and $0.34 per share, respectively) (1,255,219) (922,219) Class Y ($0.39 and $0.39 per share, respectively) (32,906,308) (36,953,978) Class Z ($0.40 and $0.40 per share, respectively) (162,131) (201,696) -------------------------------------------------------------------------------------------- Total distributions to shareowners $ (59,522,141) $ (61,258,189) -------------------------------------------------------------------------------------------- FROM FUND SHARE TRANSACTIONS Net proceeds from sale or exchange of shares $ 666,056,558 $ 622,314,487 Reinvestment of distributions 47,974,430 46,411,448 Cost of shares repurchased (647,980,831) (471,635,739) -------------------------------------------------------------------------------------------- Net increase in net assets resulting from Fund share transactions $ 66,050,157 $ 197,090,196 -------------------------------------------------------------------------------------------- Net increase in net assets $ 99,452,357 $ 181,775,903 NET ASSETS: Beginning of year $1,615,386,338 $1,433,610,435 -------------------------------------------------------------------------------------------- End of year $1,714,838,695 $1,615,386,338 ============================================================================================ Undistributed (distributions in excess of) net investment income $ (1,372,548) $ 155,624 ============================================================================================ The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/14 71 Statements of Changes in Net Assets (continued) -------------------------------------------------------------------------------------------- '14 Shares '14 Amount '13 Shares '13 Amount -------------------------------------------------------------------------------------------- Class A Shares sold 33,575,403 $ 326,968,655 24,375,983 $ 241,840,642 Reinvestment of distributions 2,135,282 20,747,926 1,779,061 17,627,684 Less shares repurchased (22,630,052) (219,467,397) (14,312,751) (141,497,556) -------------------------------------------------------------------------------------------- Net increase 13,080,633 $ 128,249,184 11,842,293 $ 117,970,770 ============================================================================================ Class B Shares exchanged 17,772 $ 171,327 88,345 $ 868,374 Reinvestment of distributions 16,903 162,846 28,586 281,456 Less shares repurchased (404,531) (3,892,942) (538,851) (5,303,792) -------------------------------------------------------------------------------------------- Net decrease (369,856) $ (3,558,769) (421,920) $ (4,153,962) ============================================================================================ Class C Shares sold 1,238,186 $ 11,902,291 2,835,146 $ 27,818,936 Reinvestment of distributions 176,433 1,692,531 216,666 2,124,028 Less shares repurchased (3,094,712) (29,662,070) (3,614,367) (35,367,504) -------------------------------------------------------------------------------------------- Net decrease (1,680,093) $ (16,067,248) (562,555) $ (5,424,540) ============================================================================================ Class K* Shares sold 459,929 $ 4,490,799 1,007 $ 10,000 Reinvestment of distributions 3,958 38,794 -- -- Less shares repurchased (19,469) (191,302) -- -- -------------------------------------------------------------------------------------------- Net increase 444,418 $ 4,338,291 1,007 $ 10,000 ============================================================================================ Class R Shares sold 2,689,792 $ 26,402,096 1,825,311 $ 18,270,357 Reinvestment of distributions 119,608 1,172,422 83,994 839,417 Less shares repurchased (1,161,793) (11,353,848) (1,149,162) (11,490,246) -------------------------------------------------------------------------------------------- Net increase 1,647,607 $ 16,220,670 760,143 $ 7,619,528 ============================================================================================ Class Y Shares sold 30,497,633 $ 293,771,461 33,476,220 $ 328,848,985 Reinvestment of distributions 2,494,174 24,002,560 2,580,484 25,341,202 Less shares repurchased (39,540,727) (379,763,123) (28,264,359) (276,929,646) -------------------------------------------------------------------------------------------- Net increase (decrease) (6,548,920) $ (61,989,102) 7,792,345 $ 77,260,541 ============================================================================================ Class Z Shares sold 241,257 $ 2,349,929 468,315 $ 4,657,193 Reinvestment of distributions 16,156 157,351 19,896 197,661 Less shares repurchased (377,159) (3,650,149) (106,004) (1,046,995) -------------------------------------------------------------------------------------------- Net increase (decrease) (119,746) $ (1,142,869) 382,207 $ 3,807,859 ============================================================================================ * Class K shares were first publicly offered on December 20, 2012. The accompanying notes are an integral part of these financial statements. 72 Pioneer Bond Fund | Annual Report | 6/30/14 Financial Highlights ----------------------------------------------------------------------------------------------------------------- Year Year Year Year Year Ended Ended Ended Ended Ended 6/30/14 6/30/13 6/30/12 6/30/11 6/30/10 ----------------------------------------------------------------------------------------------------------------- Class A Net asset value, beginning of period $ 9.67 $ 9.73 $ 9.66 $ 9.44 $ 8.63 ----------------------------------------------------------------------------------------------------------------- Increase from investment operations: Net investment income $ 0.35 $ 0.38 $ 0.42 $ 0.45 $ 0.45 Net realized and unrealized gain (loss) on investments 0.24 (0.07) 0.13 0.21 0.80 ----------------------------------------------------------------------------------------------------------------- Net increase from investment operations $ 0.59 $ 0.31 $ 0.55 $ 0.66 $ 1.25 ----------------------------------------------------------------------------------------------------------------- Distributions to shareowners: Net investment income $ (0.38) $ (0.37) $ (0.43) $ (0.44) $ (0.44) Net realized gain -- -- (0.05) -- -- ----------------------------------------------------------------------------------------------------------------- Total distributions $ (0.38) $ (0.37) $ (0.48) $ (0.44) $ (0.44) ----------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 0.21 $ (0.06) $ 0.07 $ 0.22 $ 0.81 ----------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 9.88 $ 9.67 $ 9.73 $ 9.66 $ 9.44 ================================================================================================================= Total return* 6.19% 3.21% 5.91% 7.08% 14.71% Ratio of net expenses to average net assets 0.85% 0.85% 0.85% 0.85% 0.85% Ratio of net investment income to average net assets 3.52% 3.77% 4.35% 4.63% 4.86% Portfolio turnover rate 41% 28% 21% 36% 41% Net assets, end of period (in thousands) $706,962 $565,569 $453,772 $500,905 $420,706 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses 1.00% 1.01% 1.03% 1.06% 1.07% Net investment income 3.37% 3.61% 4.17% 4.42% 4.64% ================================================================================================================= * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period, and no sales charges. Total return would be reduced if sales charges were taken into account. The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/14 73 Financial Highlights (continued) ----------------------------------------------------------------------------------------------------------------- Year Year Year Year Year Ended Ended Ended Ended Ended 6/30/14 6/30/13 6/30/12 6/30/11 6/30/10 ----------------------------------------------------------------------------------------------------------------- Class B Net asset value, beginning of period $ 9.61 $ 9.67 $ 9.60 $ 9.38 $ 8.58 ----------------------------------------------------------------------------------------------------------------- Increase from investment operations: Net investment income $ 0.24 $ 0.27 $ 0.31 $ 0.35 $ 0.35 Net realized and unrealized gain (loss) on investments 0.24 (0.06) 0.14 0.21 0.79 ----------------------------------------------------------------------------------------------------------------- Net increase from investment operations $ 0.48 $ 0.21 $ 0.45 $ 0.56 $ 1.14 ----------------------------------------------------------------------------------------------------------------- Distributions to shareowners: Net investment income $ (0.27) $ (0.27) $ (0.33) $ (0.34) $ (0.34) Net realized gain -- -- (0.05) -- -- ----------------------------------------------------------------------------------------------------------------- Total distributions $ (0.27) $ (0.27) $ (0.38) $ (0.34) $ (0.34) ----------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 0.21 $ (0.06) $ 0.07 $ 0.22 $ 0.80 ----------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 9.82 $ 9.61 $ 9.67 $ 9.60 $ 9.38 ================================================================================================================= Total return* 5.11% 2.15% 4.82% 5.99% 13.47% Ratio of net expenses to average net assets 1.90% 1.90% 1.90% 1.90% 1.90% Ratio of net investment income to average net assets 2.53% 2.78% 3.31% 3.59% 3.89% Portfolio turnover rate 41% 28% 21% 36% 41% Net assets, end of period (in thousands) $ 5,362 $ 8,805 $12,942 $18,474 $27,342 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses 2.18% 2.05% 2.02% 1.95% 1.98% Net investment income 2.25% 2.63% 3.19% 3.54% 3.81% ================================================================================================================= * 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. The accompanying notes are an integral part of these financial statements. 74 Pioneer Bond Fund | Annual Report | 6/30/14 ----------------------------------------------------------------------------------------------------------------- Year Year Year Year Year Ended Ended Ended Ended Ended 6/30/14 6/30/13 6/30/12 6/30/11 6/30/10 ----------------------------------------------------------------------------------------------------------------- Class C Net asset value, beginning of period $ 9.57 $ 9.63 $ 9.55 $ 9.34 $ 8.54 ----------------------------------------------------------------------------------------------------------------- Increase from investment operations: Net investment income $ 0.26 $ 0.29 $ 0.33 $ 0.36 $ 0.37 Net realized and unrealized gain (loss) on investments 0.23 (0.06) 0.15 0.20 0.78 ----------------------------------------------------------------------------------------------------------------- Net increase from investment operations $ 0.49 $ 0.23 $ 0.48 $ 0.56 $ 1.15 ----------------------------------------------------------------------------------------------------------------- Distributions to shareowners: Net investment income $ (0.29) $ (0.29) $ (0.35) $ (0.35) $ (0.35) Net realized gain -- -- (0.05) -- -- ----------------------------------------------------------------------------------------------------------------- Total distributions $ (0.29) $ (0.29) $ (0.40) $ (0.35) $ (0.35) ----------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 0.20 $ (0.06) $ 0.08 $ 0.21 $ 0.80 ----------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 9.77 $ 9.57 $ 9.63 $ 9.55 $ 9.34 ================================================================================================================= Total return* 5.20% 2.33% 5.12% 6.06% 13.63% Ratio of net expenses to average net assets 1.73% 1.72% 1.73% 1.73% 1.79% Ratio of net investment income to average net assets 2.69% 2.93% 3.47% 3.75% 3.91% Portfolio turnover rate 41% 28% 21% 36% 41% Net assets, end of period (in thousands) $73,224 $87,763 $93,737 $82,915 $81,892 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses 1.73% 1.72% 1.73% 1.73% 1.79% Net investment income 2.69% 2.93% 3.47% 3.75% 3.91% ================================================================================================================= * 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. The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/14 75 Financial Highlights (continued) ----------------------------------------------------------------------------------------------------------------- 12/20/12 (a) Year Ended to 6/30/14 6/30/13 ----------------------------------------------------------------------------------------------------------------- Class K Net asset value, beginning of period $ 9.67 $ 9.94 ----------------------------------------------------------------------------------------------------------------- Decrease from investment operations: Net investment income $ 0.40 $ 0.20 Net realized and unrealized loss on investments 0.20 (0.26) ----------------------------------------------------------------------------------------------------------------- Net decrease from investment operations $ 0.60 $ (0.06) ----------------------------------------------------------------------------------------------------------------- Distributions to shareowners: Net investment income $ (0.40) $ (0.21) Net realized gain -- -- ----------------------------------------------------------------------------------------------------------------- Total distributions $ (0.40) $ (0.21) ----------------------------------------------------------------------------------------------------------------- Net decrease in net asset value $ 0.20 $ (0.27) ----------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 9.87 $ 9.67 ================================================================================================================= Total return* 6.37% (0.61)%(b) Ratio of net expenses to average net assets 0.56% 0.57%** Ratio of net investment income to average net assets 3.59% 3.86%** Portfolio turnover rate 41% 28% Net assets, end of period (in thousands) $ 4,398 $ 10 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses 0.56% 0.57%** Net investment income 3.59% 3.86%** ================================================================================================================= * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, and the complete redemption of the investment at net asset value at the end of each period. (a) Class K shares were first publicly offered on December 20, 2012. (b) Not annualized. ** Annualized. The accompanying notes are an integral part of these financial statements. 76 Pioneer Bond Fund | Annual Report | 6/30/14 ----------------------------------------------------------------------------------------------------------------- Year Year Year Year Year Ended Ended Ended Ended Ended 6/30/14 6/30/13 6/30/12 6/30/11 6/30/10 ----------------------------------------------------------------------------------------------------------------- Class R Net asset value, beginning of period $ 9.76 $ 9.82 $ 9.74 $ 9.52 $ 8.71 ----------------------------------------------------------------------------------------------------------------- Increase from investment operations: Net investment income $ 0.32 $ 0.34 $ 0.39 $ 0.41 $ 0.42 Net realized and unrealized gain (loss) on investments 0.23 (0.06) 0.14 0.22 0.80 ----------------------------------------------------------------------------------------------------------------- Net increase from investment operations $ 0.55 $ 0.28 $ 0.53 $ 0.63 $ 1.22 ----------------------------------------------------------------------------------------------------------------- Distributions to shareowners: Net investment income $ (0.34) $ (0.34) $ (0.40) $ (0.41) $ (0.41) Net realized gain -- -- (0.05) -- -- ----------------------------------------------------------------------------------------------------------------- Total distributions $ (0.34) $ (0.34) $ (0.45) $ (0.41) $ (0.41) ----------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 0.21 $ (0.06) $ 0.08 $ 0.22 $ 0.81 ----------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 9.97 $ 9.76 $ 9.82 $ 9.74 $ 9.52 ================================================================================================================= Total return* 5.75% 2.80% 5.58% 6.67% 14.18% Ratio of net expenses to average net assets 1.25% 1.25% 1.25% 1.24% 1.25% Ratio of net investment income to average net assets 3.12% 3.36% 3.94% 4.25% 4.50% Portfolio turnover rate 41% 28% 21% 36% 41% Net assets, end of period (in thousands) $48,264 $31,169 $23,892 $20,508 $18,186 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses 1.32% 1.35% 1.35% 1.24% 1.26% Net investment income 3.05% 3.26% 3.84% 4.25% 4.49% ================================================================================================================= * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, and the complete redemption of the investment at net asset value at the end of each period. The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/14 77 Financial Highlights (continued) ----------------------------------------------------------------------------------------------------------------- Year Year Year Year Year Ended Ended Ended Ended Ended 6/30/14 6/30/13 6/30/12 6/30/11 6/30/10 ----------------------------------------------------------------------------------------------------------------- Class Y Net asset value, beginning of period $ 9.58 $ 9.65 $ 9.57 $ 9.36 $ 8.55 ----------------------------------------------------------------------------------------------------------------- Increase from investment operations: Net investment income $ 0.36 $ 0.39 $ 0.44 $ 0.47 $ 0.47 Net realized and unrealized gain (loss) on investments 0.24 (0.07) 0.14 0.20 0.79 ----------------------------------------------------------------------------------------------------------------- Net increase from investment operations $ 0.60 $ 0.32 $ 0.58 $ 0.67 $ 1.26 ----------------------------------------------------------------------------------------------------------------- Distributions to shareowners: Net investment income $ (0.39) $ (0.39) $ (0.45) $ (0.46) $ (0.45) Net realized gain -- -- (0.05) -- -- ----------------------------------------------------------------------------------------------------------------- Total distributions $ (0.39) $ (0.39) $ (0.50) $ (0.46) $ (0.45) ----------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 0.21 $ (0.07) $ 0.08 $ 0.21 $ 0.81 ----------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 9.79 $ 9.58 $ 9.65 $ 9.57 $ 9.36 ================================================================================================================= Total return* 6.41% 3.34% 6.27% 7.25% 15.06% Ratio of net expenses to average net assets 0.66% 0.66% 0.65% 0.61% 0.61% Ratio of net investment income to average net assets 3.72% 3.97% 4.55% 4.88% 5.13% Portfolio turnover rate 41% 28% 21% 36% 41% Net assets, end of period (in thousands) $871,801 $916,182 $847,072 $717,433 $713,869 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses 0.66% 0.66% 0.65% 0.61% 0.61% Net investment income 3.72% 3.97% 4.55% 4.88% 5.13% ================================================================================================================= * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, and the complete redemption of the investment at net asset value at the end of each period. The accompanying notes are an integral part of these financial statements. 78 Pioneer Bond Fund | Annual Report | 6/30/14 ----------------------------------------------------------------------------------------------------------------- Year Year Year Year Year Ended Ended Ended Ended Ended 6/30/14 6/30/13 6/30/12 6/30/11 6/30/10 ----------------------------------------------------------------------------------------------------------------- Class Z Net asset value, beginning of period $ 9.70 $ 9.76 $ 9.68 $ 9.46 $ 8.67 ----------------------------------------------------------------------------------------------------------------- Increase from investment operations: Net investment income $ 0.38 $ 0.40 $ 0.45 $ 0.47 $ 0.48 Net realized and unrealized gain (loss) on investments 0.22 (0.06) 0.14 0.21 0.77 ----------------------------------------------------------------------------------------------------------------- Net increase from investment operations $ 0.60 $ 0.34 $ 0.59 $ 0.68 $ 1.25 ----------------------------------------------------------------------------------------------------------------- Distributions to shareowners: Net investment income $ (0.40) $ (0.40) $ (0.46) $ (0.46) $ (0.46) Net realized gain -- -- (0.05) -- -- ----------------------------------------------------------------------------------------------------------------- Total distributions $ (0.40) $ (0.40) $ (0.51) $ (0.46) $ (0.46) ----------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 0.20 $ (0.06) $ 0.08 $ 0.22 $ 0.79 ----------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 9.90 $ 9.70 $ 9.76 $ 9.68 $ 9.46 ================================================================================================================= Total return* 6.29% 3.41% 6.23% 7.30% 14.68% Ratio of net expenses to average net assets 0.65% 0.65% 0.65% 0.65% 0.63% Ratio of net investment income to average net assets 3.70% 3.95% 4.50% 4.82% 5.00% Portfolio turnover rate 41% 28% 21% 36% 41% Net assets, end of period (in thousands) $ 4,828 $ 5,889 $ 2,196 $ 787 $ 720 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses 0.82% 0.87% 0.83% 0.72% 0.63% Net investment income 3.53% 3.73% 4.32% 4.75% 5.00% ================================================================================================================= * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, and the complete redemption of the investment at net asset value at the end of each period. The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/14 79 Notes to Financial Statements | 6/30/14 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 seven classes of shares designated as Class A, Class B, Class C, Class K, Class R, Class Y and Class Z shares. Class K shares were first publicly offered on December 20, 2012. Effective as of the close of business on December 31, 2009, Class B shares are no longer offered to new or existing shareholders, except that dividends and/or capital gain distributions may continue to be reinvested in Class B shares, and shareholders may exchange their Class B shares for Class B shares of other Pioneer funds, as permitted by existing exchange privileges. Each class of shares represents an interest in the same portfolio of investments of the Fund and has identical rights (based on relative net asset values) to assets and liquidation proceeds. Share classes can bear different rates of class-specific fees and expenses such as transfer agent and distribution fees. Differences in class-specific fees and expenses will result in differences in net investment income and, therefore, the payment of different dividends from net investment income earned by each class. The Amended and Restated Declaration of Trust of the Fund gives the Board the flexibility to specify either per-share voting or dollar-weighted voting when submitting matters for shareholder approval. Under per-share voting, each share of a class of the Fund is entitled to one vote. Under dollar-weighted voting, a shareholder's voting power is determined not by the number of shares owned, but by the dollar value of the shares on the record date. Each share class has exclusive voting rights with respect to matters affecting only that class, including with respect to the distribution plan for that class. There is no distribution plan for Class K, Class Y or Class Z shares. Class B shares convert to Class A shares approximately eight years after the date of purchase. The Fund's financial statements have been prepared in conformity with U.S. generally accepted accounting principles that require the management of the Fund to, among other things, make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of income, expenses and gains and losses on investments during the reporting period. Actual results could differ from those estimates. 80 Pioneer Bond Fund | Annual Report | 6/30/14 The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements, which are consistent with those policies generally accepted in the investment company industry: A. Security Valuation Security transactions are recorded as of trade date. The net asset value of the Fund is computed once daily, on each day the New York Stock Exchange (NYSE) is open, as of the close of regular trading on the NYSE. Senior floating rate loan interests (senior loans) are valued in accordance with guidelines established by the Board of Trustees at the mean between the last available bid and asked prices from one or more brokers or dealers as obtained from Loan Pricing Corporation, an independent pricing service. 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 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. Fixed income securities with remaining maturity of more than sixty days are valued at prices supplied by independent pricing services, which consider such factors as market prices, market events, quotations from one or more brokers, Treasury spreads, yields, maturities and ratings. Valuations may be supplemented by dealers and other sources, as required. Credit default swaps are valued by an independent pricing service based upon valuation models incorporating default probabilities, estimated recovery rates, actual reported transactions, and other available market data. Equity securities that have traded on an exchange are valued at the last sale price on the principal exchange where they are traded. Equity securities that have not traded on the date of valuation, or securities for which sale prices are not available, generally are valued using the mean between the last bid and asked prices. Short-term fixed income securities with remaining maturities of sixty days or less generally are valued at amortized cost. Shares of money market mutual funds are valued at such funds' net asset value. Securities or senior loans for which independent pricing services are unable to supply prices or for which market prices and/or quotations are not readily available or are considered to be unreliable are valued by a fair valuation team comprised of certain personnel of Pioneer Investment Management, Inc. (PIM), the Fund's investment adviser, pursuant to procedures adopted by the Fund's Board of Trustees. PIM's fair valuation team uses fair value methods approved by the Valuation Committee of the Board of Trustees. PIM's fair valuation team is responsible for monitoring developments that may impact fair valued securities and for discussing and assessing fair values on an ongoing basis, and at least quarterly, with the Valuation Committee of the Board of Trustees. Pioneer Bond Fund | Annual Report | 6/30/14 81 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, 2014, one security was valued using fair value methods (in addition to securities valued using prices supplied by independent pricing services) representing 0.1% of net assets. 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 debt securities are accreted/amortized for financial reporting purposes over the life of the respective securities, and such accretion/amortization is included in interest income. Dividend income is recorded on the ex-dividend date, except that certain dividends from foreign securities where the ex-dividend date may have passed are recorded as soon as the Fund becomes aware of the ex-dividend data in the exercise of reasonable diligence. Interest income, including interest on income bearing cash accounts, is recorded on the accrual basis. Dividend and interest income are reported net of unrecoverable foreign taxes withheld at the applicable country rates. Gains and losses on sales of investments are calculated on the identified cost method for both financial reporting and federal income tax purposes. B. Federal Income Taxes It is the Fund's policy to comply with the requirements of the Internal Revenue Code applicable to regulated investment companies and to distribute all of its taxable income and net realized capital gains, if any, to its shareowners. Therefore, no provision for federal income taxes is required. As of June 30, 2014, the Fund did not accrue any interest or penalties with respect to uncertain tax positions, which, if applicable, would be recorded as an income tax expense in the Statement of Operations. Tax returns filed within the prior three years remain subject to examination by Federal and State tax authorities. 82 Pioneer Bond Fund | Annual Report | 6/30/14 The amount and character of income and capital gain distributions to shareowners are determined in accordance with federal income tax rules, which may differ from U.S. generally accepted accounting principles. Distributions in excess of net investment income or net realized gains are temporary overdistributions for financial statement purposes resulting from differences in the recognition or classification of income or distributions for financial statement and tax purposes. Capital accounts within the financial statements are adjusted for permanent book/tax differences to reflect tax character, but are not adjusted for temporary differences. At June 30, 2014, the Fund reclassified $2,810,165 to decrease Distributions in excess of net investment income, $1,040,058 to increase accumulated net realized loss on investments, swap contracts and futures contracts and $1,770,107 to increase Paid-in capital to reflect permanent book/tax differences. These adjustments have no impact on the net assets or results of operations. At June 30, 2014, the Fund was permitted to carry forward $4,795,956 of long-term losses without limitation. Additionally, during the year ended June 30, 2014, a capital loss carry forward of $13,607,587 was utilized to offset net realized gains by the Fund. The tax character of distributions paid during the years ended June 30, 2014 and June 30, 2013 was as follows: --------------------------------------------------------------------------- 2014 2013 --------------------------------------------------------------------------- Distributions paid from: Ordinary income $59,522,141 $61,258,189 Long-term capital gain -- -- --------------------------------------------------------------------------- Total $59,522,141 $61,258,189 =========================================================================== The following shows the components of distributable earnings on a federal income tax basis at June 30, 2014: ------------------------------------------------------------------------- 2014 ------------------------------------------------------------------------- Distributable earnings: Capital loss carryforward $ (4,795,956) Dividends payable (605,287) Net unrealized appreciation 76,752,314 ------------------------------------------------------------------------- Total $ 71,351,071 ========================================================================= 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, the mark-to-market of futures contracts and credit default swaps. Pioneer Bond Fund | Annual Report | 6/30/14 83 C. Fund Shares The Fund records sales and repurchases of its shares as of trade date. Pioneer Funds Distributor, Inc. (PFD), the principal underwriter for the Fund and a wholly owned indirect subsidiary of UniCredit S.p.A. (UniCredit), earned $49,784 in underwriting commissions on the sale of Class A shares during the year ended June 30, 2014. D. 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 B, Class C, and Class R shares of the Fund, respectively (see Note 4). Class K, Class Y and Class Z shares do not pay distribution fees. All expenses and fees paid to the transfer agent, Pioneer Investment Management Shareholder Services, Inc. (PIMSS), for its services are allocated among the classes of 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 B, Class C, Class K, Class R, Class Y and Class Z shares can reflect different transfer agent and distribution expense rates. E. Risks At times, the Fund's investments may represent industries or industry sectors that are interrelated or have common risks, making the Fund more susceptible to any economic, political, or regulatory developments or other risks affecting those industries and sectors. The Fund's prospectus contains unaudited information regarding the Fund's principal risks. Please refer to that document when considering the Fund's principal risks. F. 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 84 Pioneer Bond Fund | Annual Report | 6/30/14 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, 2014 was $2,298,450. 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, 2014 was $170,423,193. At June 30, 2014, open futures contracts were as follows: ---------------------------------------------------------------------------------------- Number of Contracts Settlement Unrealized Type Long/(Short) Month Value Appreciation ---------------------------------------------------------------------------------------- U.S. Long Bond (CBT) (100) 9/14 $ (13,718,750) $ 71,094 U.S. Ultra Bond (CBT) (36) 9/14 (5,397,750) 35,719 U.S. 10 Year Note (CBT) (1,268) 9/14 (158,717,938) 673,624 U.S. 2 Year Note (CBT) (170) 9/14 (37,330,938) 37,188 U.S. 5 Year Note (CBT) (321) 9/14 (38,346,961) 140,437 --------------------------------------------------------------------------------------- $ (253,512,337) $ 958,062 --------------------------------------------------------------------------------------- G. Repurchase Agreements With respect to repurchase agreements entered into by the Fund, the value of the underlying securities (collateral), including accrued interest, is required to be equal to or in excess of the repurchase price. The collateral for all repurchase agreements is held in safekeeping in the customer-only account of the Fund's custodian or a subcustodian of the Fund. PIM is responsible for determining that the value of the collateral remains at least equal to the repurchase price. H. Credit Default Swap Agreements A credit default swap is a contract between a buyer of protection and a seller of protection against a pre-defined credit event. The Fund may buy or sell credit default swap contracts to seek to increase the Fund's income, or to attempt to hedge the risk of default on portfolio securities. A credit default swap index is used to hedge risk or take a position on a basket of credit entities or indices. As a seller of protection, the Fund would be required to pay the notional (or other agreed-upon) value of the referenced debt obligation to the counterparty in the event of a default by a U.S. or foreign Pioneer Bond Fund | Annual Report | 6/30/14 85 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. Open credit default swap contracts at June 30, 2014 are listed in the Schedule of Investments. The average value of swap contracts open during the year ended June 30, 2014 was $3,769,868. 2. Management Agreement PIM, a wholly owned indirect subsidiary of UniCredit, manages the Fund's portfolio. Management fees are calculated daily at the annual rate of 0.50% of the Fund's average daily net assets up to $1 billion; 0.45% of the next $1 billion; and 0.40% of the excess over $2 billion. For the year ended June 30, 2014, the effective management fee (excluding waivers and/or assumption of expenses) was equal to 0.48% of the Fund's average daily net assets. 86 Pioneer Bond Fund | Annual Report | 6/30/14 PIM has contractually agreed to limit ordinary operating expenses to the extent required to reduce Fund expenses to 0.85%, 1.90%, 1.90%, 1.25% and 0.65% of the average daily net assets attributable to Class A, Class B, Class C, Class R and Class Z shares, respectively. Fees waived and expenses reimbursed during the year ended June 30, 2014 are reflected on the Statement of Operations. These expense limitations are in effect through November 1, 2015. There can be no assurance that PIM will extend the expense limitation agreement for a class of shares beyond the dates referred to above. In addition, under the management and administration agreements, certain other services and costs, including accounting, regulatory reporting, and insurance premiums, are paid by the Fund as administrative reimbursements. Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $106,205 in management fees, administrative costs and certain other reimbursements payable to PIM at June 30, 2014. 3. Transfer Agent PIMSS, a wholly owned indirect subsidiary of UniCredit, provides substantially all transfer agent and shareowner services to the Fund at negotiated rates. In addition, the Fund reimburses PIMSS for out-of-pocket expenses incurred by PIMSS related to shareholder communications activities such as proxy and statement mailings, outgoing phone calls and omnibus relationship contracts. For the year ended June 30, 2014, such out-of-pocket expenses by class of shares were as follows: -------------------------------------------------------------------------------- Shareholder Communications: -------------------------------------------------------------------------------- Class A $ 897,000 Class B 10,099 Class C 94,100 Class K 34 Class R 87,000 Class Y 842,500 Class Z 6,250 ------------------------------------------------------------------------------- Total $1,936,983 ================================================================================ Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $278,636 in transfer agent fees and out-of-pocket reimbursements payable to PIMSS at June 30, 2014. 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 B, Class C and Class R shares. Pursuant to the Plan, the Fund pays PFD 0.25% of the Pioneer Bond Fund | Annual Report | 6/30/14 87 average daily net assets attributable to Class A shares as compensation for personal services and/or account maintenance services or distribution services with regard to Class A shares. Pursuant to the Plan, the Fund also pays PFD 1.00% of the average daily net assets attributable to Class B and Class C shares. The fee for Class B and 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 B and Class C shares. Pursuant to the Plan, the Fund further pays PFD 0.50% of the average daily net assets attributable to Class R shares for distribution services. Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $30,268 in distribution fees payable to PFD at June 30, 2014. 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, Class Y and Class Z shares) may be subject to a contingent deferred sales charge (CDSC). A CDSC of 1.00% may be imposed on redemptions of certain net asset value purchases of Class A shares within 12 months of purchase. Class B shares that are redeemed within five years of purchase are subject to a CDSC at declining rates beginning at 4.00%, based on the lower of cost or market value of shares being redeemed. 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, Class Y or Class Z shares. Proceeds from the CDSC are paid to PFD. For the year ended June 30, 2014, CDSC in the amount of $16,085 were paid to PFD. 5. Expense Offset Arrangements The Fund has entered into certain expense offset arrangements with PIMSS which may result in a reduction in the Fund's total expenses due to interest earned on cash held by PIMSS. For the year ended June 30, 2014, the Fund's expenses were not reduced under such arrangements. 6. 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 88 Pioneer Bond Fund | Annual Report | 6/30/14 facility in effect until February 12, 2014 was in the amount of $215 million. As of February 12, 2014, the facility is in the amount of $240 million. Under such facility, depending on the type of loan, interest on borrowings is payable at the London Interbank Offered Rate (LIBOR) plus 0.90% (0.85% as of February 12, 2014) 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, 2014, the Fund had no borrowings under a credit facility. 7. Assets and Liabilities Offsetting Financial instruments subject to an enforceable master netting agreement have been offset on the Statement of Assets and Liabilities. The following charts show gross assets and liabilities of the Fund as of June 30, 2014. -------------------------------------------------------------------------------------------- Assets: Net Gross Amounts Gross Amounts Amounts of Assets Not Offset in Offset Presented the Statement of in the in the Assets and Liabilities Gross Statement Statement ------------------------ Amounts of of Assets of Assets Cash Recognized and and Financial Collateral Net Description Assets Liabilities Liabilities Instruments Received Amount -------------------------------------------------------------------------------------------- Futures contracts $958,062 $ -- $ -- $ -- $ -- $958,062 Swap contracts -- -- -- -- -- -- -------------------------------------------------------------------------------------------- $958,062 $ -- $ -- $ -- $ -- $958,062 ============================================================================================ --------------------------------------------------------------------------------------------- Liabilities: Net Gross Amounts Gross Amounts Amounts of Assets Not Offset in Offset Presented the Statement of in the in the Assets and Liabilities Gross Statement Statement ------------------------ Amounts of of Assets of Assets Cash Recognized and and Financial Collateral Net Description Liabilities Liabilities Liabilities Instruments Received Amount --------------------------------------------------------------------------------------------- Futures contracts $ -- $ -- $ -- $ -- $ -- $ -- Swap contracts 99,974 -- -- -- -- 99,974 --------------------------------------------------------------------------------------------- $99,974 $ -- $ -- $ -- $ -- $99,974 ============================================================================================= Pioneer Bond Fund | Annual Report | 6/30/14 89 8. Additional Disclosures about Derivative Instruments and Hedging Activities: Values of derivative instruments as of June 30, 2014 were as follows: -------------------------------------------------------------------------------------------- Derivatives Not Accounted for as Asset Derivatives 2014 Liabilities Derivatives 2014 Hedging Instruments ------------------------------------------------------------- Under Accounting Statement of Assets Statement of Assets Standards Codification and Liabilities and Liabilities (ASC) 815 Location Value Location Value -------------------------------------------------------------------------------------------- Futures contracts* Net unrealized Net unrealized appreciation on depreciation on futures contracts $958,062 futures contracts $ -- Swap Contracts Net unrealized Net unrealized appreciation on depreciation on swap contracts $ -- swap contracts $99,974 -------------------------------------------------------------------------------------------- Total $958,062 $99,974 ============================================================================================ * Reflects the unrealized appreciation on futures contracts (see Note 1F). The effect of derivative instruments on the Statement of Operations for the year ended June 30, 2014 was as follows: -------------------------------------------------------------------------------------------------- Change in Derivatives Not Realized Unrealized Accounted for as Gain or Appreciation or Hedging Instruments Loss on (Depreciation) Under Accounting Location of Gain or (Loss) Derivatives on Derivatives Standards Codification on Derivatives Recognized Recognized Recognized (ASC) 815 in Income in Income in Income -------------------------------------------------------------------------------------------------- Futures contracts Net realized gain (loss) on futures contracts $(2,515,629) Futures contracts Change in unrealized appreciation (depreciation) on futures contracts $ 601,938 Swap Contracts Net realized gain (loss) on swap contracts $ 109,554 Swap Contracts Change in unrealized appreciation (depreciation) on swap contracts $(295,480) 9. Change in Independent Registered Public Accounting Firm The board of Trustees of the Fund, with the approval and recommendation of the Audit Committee, appointed Deloitte & Touche LLP to serve as the Fund's independent registered public accounting firm for the fiscal year ending June 30, 2014. Deloitte & Touche LLP replaces Ernst & Young LLP, which resigned as the Fund's independent registered public accounting firm, effective upon completion of the audit of the Fund's financial statements for the fiscal year ended June 30, 2013. 90 Pioneer Bond Fund | Annual Report | 6/30/14 During the periods that Ernst & Young LLP served as the Fund's independent registered public accounting firm, including the Fund's two most recent fiscal years, Ernst & Young LLP's reports on the financial statements of the Fund 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 Ernst & Young LLP on any matter of accounting principles or practices, financial statement disclosure, or auditing scope or procedure, which, if not resolved to the satisfaction of Ernst & Young LLP would have caused Ernst & Young LLP 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. 10. Subsequent Events Upcoming Conversion of Class B shares As of the close of business on November 10, 2014 (the "Conversion Date"), all outstanding Class B shares of the Pioneer funds will be converted to Class A shares. Shareholders may continue to hold their Class B shares until the Conversion Date. Prior to the Conversion Date, redemptions of Class B shares are subject to any applicable contingent deferred sales charges (CDSC's). Class A shares acquired through The conversion will not be subject to CDSCs, nor will any sales charges be assessed in connection with The conversion. After the Conversion Date, subsequent purchases of Class A shares will be subject to sales charges as described in the Fund's prospectus. Management Fee Change As of July 1, 2014, Pioneer's management fees are calculated daily at the annual rate 0.40% of the Portfolio's average daily net assets. Prior to July 1, 2014, Pioneer's management fees were calculated daily at the rate of 0.50% of the Fund's average daily net assets up to $1 billion; 0.45% of the next $1 billion and 0.40% of the excess over $2 billion. In addition, as of July 1, 2014, PIM has contractually agreed to limit ordinary expenses to the extent required to reduce Fund expenses to 1.10% and 0.58% of the average daily net assets attributable to Class R and Class Y shares. Prior to July 1, 2014, PIM had contractually agreed to limit ordinary expenses to the extent required to reduce Fund expenses to 1.25% of Class R shares. Prior to July 1, 2014, Class Y shares did not have an expense limitation. These expense limitations are in effect through November 1, 2016. Pioneer Bond Fund | Annual Report | 6/30/14 91 Report of Independent Registered Public Accounting Firm To the Board of Trustees and the Shareholders 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, 2014, and the related statements of operations and changes in net assets, and the financial highlights for year then ended. 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 of the Fund for the year ended June 30, 2013, and the financial highlights for the years ended June 30, 2013, 2012, 2011 and 2010 were audited by other auditors. Those auditors expressed an unqualified opinion on those financial statements and financial highlights in their report dated August 22, 2013. 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. The Fund is not required to have, nor were we engaged to perform, an audit of its 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, assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. Our procedures included confirmation of securities owned as of June 30, 2014, by correspondence with the custodian, brokers and agent banks; where replies were not received from brokers and agent banks, we performed other auditing procedures. 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 as of June 30, 2014, and the results of its operations, the changes in its net assets, and the financial highlights for the year then ended, in conformity with accounting principles generally accepted in the United States of America. /s/ Deloitte & Touche LLP Boston, Massachusetts August 21, 2014 92 Pioneer Bond Fund | Annual Report | 6/30/14 ADDITIONAL INFORMATION (unaudited) The percentage of the Fund's ordinary income distributions that are exempt from nonresident alien (NRA) tax withholding resulting from qualified interest income was 81.10%. Pioneer Bond Fund | Annual Report | 6/30/14 93 Trustees, Officers and Service Providers Investment Adviser Pioneer Investment Management, Inc. Custodian and Sub-Administrator Brown Brothers Harriman & Co. Independent Registered Public Accounting Firm Deloitte & Touche LLP Principal Underwriter Pioneer Funds Distributor, Inc. Legal Counsel Bingham McCutchen LLP Shareowner Services and Transfer Agent Pioneer Investment Management Shareholder Services, Inc. Proxy Voting Policies and Procedures of the Fund are available without charge, upon request, by calling our toll free number (1-800-225-6292). Information regarding how the Fund voted proxies relating to portfolio securities during the most recent 12-month period ended June 30 is publicly available to shareowners at us.pioneerinvestments.com. This information is also available on the Securities and Exchange Commission's web site at www.sec.gov. Trustees and Officers The Fund's Trustees and officers are listed on the following pages, together with their principal occupations 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 55 U.S. registered investment portfolios for which 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. 94 Pioneer Bond Fund | Annual Report | 6/30/14 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 (63) Trustee since 2006. Serves Private investor (2004-2008 and Director, Broadridge Chairman of the Board and until a successor trustee 2013-present); Chairman (2008 - 2013) and Financial Solutions, Trustee is elected or earlier Chief Executive Officer (2008 - 2012), Inc. (investor retirement or removal. Quadriserv, Inc. (technology products for communications and securities lending industry); and Senior securities processing Executive Vice President, The Bank of New provider for financial York (financial and securities services) services industry) (1986 - 2004) (2009 - present); Director, Quadriserv, Inc. (2005 - 2013); and Commissioner, New Jersey State Civil Service Commission (2011 - present) ------------------------------------------------------------------------------------------------------------------------------------ David R. Bock (70) Trustee since 2005. Serves Managing Partner, Federal City Capital Director of Enterprise Trustee until a successor trustee Advisors (corporate advisory services Community Investment, is elected or earlier company) (1997 - 2004 and 2008 - present); Inc. (privately held retirement or removal. Interim Chief Executive Officer, Oxford affordable housing Analytica, Inc. (privately held research finance company) (1985 and consulting company) (2010); Executive - 2010); Director of Vice President and Chief Financial Officer, Oxford Analytica, Inc. I-trax, Inc. (publicly traded health care (2008 - present); services company) (2004 - 2007); and Director of The Swiss Executive Vice President and Chief Helvetia Fund, Inc. Financial Officer, Pedestal Inc. (closed-end fund) (2010 (internet-based mortgage trading company) - present); and (2000 - 2002) Director of New York Mortgage Trust (publicly traded mortgage REIT) (2004 - 2009, 2012 - present) ------------------------------------------------------------------------------------------------------------------------------------ Benjamin M. Friedman (69) Trustee since 2008. Serves William Joseph Maier Professor of Political Trustee, Mellon Trustee until a successor trustee Economy, Harvard University (1972 - Institutional Funds is elected or earlier present) Investment Trust and retirement or removal. Mellon Institutional Funds Master Portfolio (oversaw 17 portfolios in fund complex) (1989-2008) ------------------------------------------------------------------------------------------------------------------------------------ Pioneer Bond Fund | Annual Report | 6/30/14 95 Independent Trustees (continued) ------------------------------------------------------------------------------------------------------------------------------------ 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 (66) Trustee since 2002. Founding Director, Vice President and None Trustee Serves until a successor Corporate Secretary, The Winthrop Group, trustee is elected or Inc. (consulting firm) (1982 - present); earlier retirement or Desautels Faculty of Management, McGill removal. University (1999 - present); and Manager of Research Operations and Organizational Learning, Xerox PARC, Xerox's advance research center (1990-1994) ------------------------------------------------------------------------------------------------------------------------------------ Marguerite A. Piret (65) Trustee since 2002. President and Chief Executive Officer, Director of New America Trustee Serves until a successor Newbury, Piret & Company, Inc. (investment High Income Fund, Inc. trustee is elected or banking firm) (1981 - present) (closed-end investment earlier retirement or company) (2004 - removal. present); and member, Board of Governors, Investment Company Institute (2000 - 2006) ------------------------------------------------------------------------------------------------------------------------------------ Stephen K. West (85)* Trustee since 2002. Senior Counsel, Sullivan & Cromwell LLP Director, The Swiss Trustee Serves until a successor (law firm) (1998 - present); and Partner, Helvetia Fund, Inc. trustee is elected or Sullivan & Cromwell LLP (prior to 1998) (closed-end investment earlier retirement or company) (1995 - 2012); removal. and Director, Invesco, Ltd. (formerly AMVESCAP, PLC) (investment manager) (1997-2005) ------------------------------------------------------------------------------------------------------------------------------------ * Retired effective July 15, 2014. 96 Pioneer Bond Fund | Annual Report | 6/30/14 Interested Trustees ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Term of Office and Other Directorships Position Held with the Fund Length of Service Principal Occupation Held by Trustee ------------------------------------------------------------------------------------------------------------------------------------ Daniel K. Kingsbury (55)*,++ Trustee since 2007. Chairman (2013 - 2014), Director, CEO and None Trustee, President and Chief Serves until a successor President of PIM-USA (since February 2007); Executive Officer of the trustee is elected or Chairman (2013 - 2014), Director and Fund earlier retirement or President of Pioneer and Pioneer removal. Institutional Asset Management, Inc. (February 2007 - August 2014); Executive Vice President of all of the Pioneer Funds (2007 - 2013); Director of PGAM (2007 - 2010); Head of New Europe Division, PGAM (2000 - 2005); and Head of New Markets Division, PGAM (2005 - 2007) ------------------------------------------------------------------------------------------------------------------------------------ Kenneth J. Taubes (55)* Trustee since 2014. Director and Executive Vice President None Trustee Serves until a successor (since 2008) and Chief Investment Officer, trustee is elected or U.S. (since 2010), of PIM-USA; Executive earlier retirement or Vice President of Pioneer (since 2008); removal. Executive Vice President of Pioneer Institutional Asset Management, Inc. (since 2009); Portfolio Manager of Pioneer (since 1999) ------------------------------------------------------------------------------------------------------------------------------------ * Mr. Kingsbury and Mr. Taubes are Interested Trustees because they are officers or directors of the Fund's investment adviser and certain of its affiliates. ++ Resigned effective August 8, 2014. Pioneer Bond Fund | Annual Report | 6/30/14 97 Fund Officers ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Term of Office and Other Directorships Position Held with the Fund Length of Service Principal Occupation Held by Officer ------------------------------------------------------------------------------------------------------------------------------------ Mark D. Goodwin (49) Since 2014. Serves at the Executive Vice President and Chief None Executive Vice President discretion of the Board. Operating Officer of Pioneer since 2005 and Executive Vice President of all the Pioneer funds since 2014 ------------------------------------------------------------------------------------------------------------------------------------ Christopher J. Kelley (49) Since 2003. Serves at the Vice President and Associate General None Secretary and Chief Legal discretion of the Board. Counsel of Pioneer since January 2008; Officer Secretary and Chief Legal Officer of all of the Pioneer Funds since June 2010; Assistant Secretary of all of the Pioneer Funds from September 2003 to May 2010; and Vice President and Senior Counsel of Pioneer from July 2002 to December 2007 ------------------------------------------------------------------------------------------------------------------------------------ Carol B. Hannigan (53) Since 2010. Serves at the Fund Governance Director of Pioneer since None Assistant Secretary discretion of the Board. December 2006 and Assistant Secretary of all the Pioneer Funds since June 2010; Manager - Fund Governance of Pioneer from December 2003 to November 2006; and Senior Paralegal of Pioneer from January 2000 to November 2003 ------------------------------------------------------------------------------------------------------------------------------------ Thomas Reyes (51) Since 2010. Serves at the Senior Counsel of Pioneer since May 2013 None Assistant Secretary discretion of the Board. and Assistant Secretary of all the Pioneer Funds since June 2010; Counsel of Pioneer from June 2007 to May 2013 ------------------------------------------------------------------------------------------------------------------------------------ Mark E. Bradley (54) Since 2008. Serves at the Vice President - Fund Treasury of Pioneer; None Treasurer and Chief discretion of the Board. Treasurer of all of the Pioneer Funds since Financial and Accounting March 2008; Deputy Treasurer of Pioneer Officer of the Fund from March 2004 to February 2008; and Assistant Treasurer of all of the Pioneer Funds from March 2004 to February 2008 ------------------------------------------------------------------------------------------------------------------------------------ 98 Pioneer Bond Fund | Annual Report | 6/30/14 ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Term of Office and Other Directorships Position Held with the Fund Length of Service Principal Occupation Held by Officer ------------------------------------------------------------------------------------------------------------------------------------ Luis I. Presutti (48) Since 2002. Serves at the Director - Fund Treasury of Pioneer; and None Assistant Treasurer discretion of the Board. Assistant Treasurer of all of the Pioneer Funds ------------------------------------------------------------------------------------------------------------------------------------ Gary Sullivan (55) Since 2002. Serves at the Fund Accounting Manager - Fund Treasury of None Assistant Treasurer discretion of the Board. Pioneer; and Assistant Treasurer of all of the Pioneer Funds ------------------------------------------------------------------------------------------------------------------------------------ David F. Johnson (34) Since 2009. Serves at the Fund Administration Manager - Fund Treasury None Assistant Treasurer discretion of the Board. of Pioneer since November 2008; Assistant Treasurer of all of the Pioneer Funds since January 2009; and Client Service Manager - Institutional Investor Services at State Street Bank from March 2003 to March 2007 ------------------------------------------------------------------------------------------------------------------------------------ Jean M. Bradley (61) Since 2010. Serves at the Chief Compliance Officer of Pioneer and of None Chief Compliance Officer discretion of the Board. all the Pioneer Funds since March 2010; Director of Adviser and Portfolio Compliance at Pioneer since October 2005; and Senior Compliance Officer for Columbia Management Advisers, Inc. from October 2003 to October 2005 ------------------------------------------------------------------------------------------------------------------------------------ Kelly O'Donnell (43) Since 2006. Serves at the Director - Transfer Agency Compliance of None Anti-Money Laundering discretion of the Board. Pioneer and Anti-Money Laundering Officer Officer of all the Pioneer funds since 2006 ------------------------------------------------------------------------------------------------------------------------------------ Pioneer Bond Fund | Annual Report | 6/30/14 99 This page for your notes. 100 Pioneer Bond Fund | Annual Report | 6/30/14 How to Contact Pioneer We are pleased to offer a variety of convenient ways for you to contact us for assistance or information. Call us for: -------------------------------------------------------------------------------- Account Information, including existing accounts, new accounts, prospectuses, applications and service forms 1-800-225-6292 FactFone(SM) for automated fund yields, prices, account information and transactions 1-800-225-4321 Retirement plans information 1-800-622-0176 Write to us: -------------------------------------------------------------------------------- PIMSS, Inc. P.O. Box 55014 Boston, Massachusetts 02205-5014 Our toll-free fax 1-800-225-4240 Our internet e-mail address ask.pioneer@pioneerinvestments.com (for general questions about Pioneer only) Visit our web site: us.pioneerinvestments.com This report must be preceded or accompanied by a prospectus. The Fund files a complete schedule of investments with the Securities and Exchange Commission for the first and third quarters for each fiscal year on Form N-Q. Shareholders may view the filed Form N-Q by visiting the Commission's web site at http://www.sec.gov. The filed form may also be viewed and copied at the Commission's Public Reference Room in Washington, DC. Information regarding the operations of the Public Reference Room may be obtained by calling 1-800-SEC-0330. [LOGO] PIONEER Investments(R) Pioneer Investment Management, Inc. 60 State Street Boston, MA 02109 us.pioneerinvestments.com Securities offered through Pioneer Funds Distributor, Inc. 60 State Street, Boston, MA 02109 Underwriter of Pioneer Mutual Funds, Member SIPC (C) 2014 Pioneer Investments 19398-08-0814 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 services provided to the Fund were totaled approximately $40,803 payable to Deloitte & Touche LLP for the year ended June 30, 2014 and $42,076 were paid to the former auditor, Ernst & Young LLP for the year ended June 30, 2013. (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 fees and other fees for the Fund payable to Deloitte & Touche LLP for the year ended June 30, 2014 and approximately $9,652 were paid to the former auditor, Ernst & Young LLP for the year ended June 30, 2013. (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. Fees for tax compliance services, primarily for tax returns, totaled approximately $7,100 payable to Deloitte & Touche LLP for the year ended June 30, 2014 and $8,290 were paid to the former auditor, Ernst & Young LLP for the year ended June 30, 2013. (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 audit related fees and other fees for the Fund payable to Deloitte & Touche LLP for the year ended June 30, 2014 and approximately $9,652 were paid to the former auditor, Ernst & Young LLP for the year ended June 30, 2013. (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, 2014 and 2013, 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 $7,100 payable to Deloitte & Touche LLP for the year ended June 30, 2014 and $17,942 were paid to the former auditor, Ernst & Young LLP for the year ended June 30, 2013. (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/ Mark Goodwin Mark Goodwin, Executive Vice President Date August 28, 2014 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/ Mark Goodwin Mark Goodwin, Executive Vice President Date August 28, 2014 By (Signature and Title)* /s/ Mark Bradley Mark Bradley, Treasurer & Chief Accounting & Financial Officer Date August 28, 2014 * Print the name and title of each signing officer under his or her signature.