OMB APPROVAL OMB Number: 3235-0570 Expires: August 31, 2013 Estimated average burden hours per response.....18.9 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-CSR CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT INVESTMENT COMPANIES 		Investment Company Act file number 811-02864 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, 2012 through June 30, 2013 Form N-CSR is to be used by management investment companies to file reports with the Commission not later than 10 days after the transmission to stockholders of any report that is required to be transmitted to stockholders under Rule 30e-1 under the Investment Company Act of 1940 (17 CFR 270.30e-1). The Commission may use the information provided on Form N-CSR in its regulatory, disclosure review, inspection, and policymaking roles. A registrant is required to disclose the information specified by Form N-CSR, and the Commission will make this information public. A registrant is not required to respond to the collection of information contained in Form N-CSR unless the Form displays a currently valid Office of Management and Budget ("OMB") control number. Please direct comments concerning the accuracy of the information collection burden estimate and any suggestions for reducing the burden to Secretary, Securities and Exchange Commission, 450 Fifth Street, NW, Washington, DC 20549-0609. The OMB has reviewed this collection of information under the clearance requirements of 44 U.S.C. ss. 3507. ITEM 1. REPORTS TO SHAREOWNERS. Pioneer Bond Fund -------------------------------------------------------------------------------- Annual Report | June 30, 2013 -------------------------------------------------------------------------------- Ticker Symbols: Class A PIOBX Class B PBOBX Class C PCYBX Class K PBFKX* Class R PBFRX Class Y PICYX Class Z PIBZX * Class K shares were first publicly offered on December 20, 2012. [LOGO] PIONEER Investments(R) visit us: us.pioneerinvestments.com Table of Contents Letter to Shareowners 2 Portfolio Management Discussion 4 Portfolio Summary 9 Prices and Distributions 10 Performance Update 11 Comparing Ongoing Fund Expenses 18 Schedule of Investments 20 Financial Statements 74 Notes to Financial Statements 85 Report of Independent Registered Public Accounting Firm 96 Trustees, Officers and Service Providers 98 Pioneer Bond Fund | Annual Report | 6/30/13 1 President's Letter Dear Shareowner, When we look at the U.S. economy as we head into the second half of 2013, we continue to see slow, but ongoing, growth. Employment has been steadily rising. Consumer incomes, savings, wealth, and debt-servicing capacity have been solid buttresses for the recovering housing and auto industries. Industrial activity is growing only modestly, but current corporate profits are generally solid and balance sheets appear able to support needed capital spending and dividend* payouts. The scaled-back "fiscal cliff" tax increases and spending cuts have meaningfully cut the budget deficit without, it seems, driving the economy back into recession. In addition, we feel that continuing slack in labor markets and capacity utilization offers the potential for continuing growth without bottlenecks and rising inflation. After observing the strengthening economic trends, the Federal Reserve (the Fed) has hinted that it may begin to scale back its bond purchases (currently $85 billion per month in quantitative easing, or "QE") later in 2013, and could terminate the purchases altogether sometime in 2014, depending on subsequent economic data releases. Pioneer believes that, barring an external shock, modest economic growth can be sustained at least over the next couple of years without continuous, aggressive intervention from the Fed. The Fed has also said that short-term interest rates are likely to remain near zero for some time to come. Given that inflation remains subdued and unemployment remains high, there is no urgency about raising rates. While inflation is not a near-term concern, the Fed's aggressive monetary policies helped investors drive long-term Treasury yields to unsustainably low levels. A return to more normal levels in response to expectations of a stronger economy and the potential for less QE resulted in disappointing returns for bond investors during the first half of 2013, but the stock market rewarded shareholders who were undaunted by the double-barreled threat of the "fiscal cliff" and debt-ceiling debates at the beginning of 2013. The Standard & Poor's 500 Index, a broad measure of the U.S. stock market, returned 13.82% during the first six months of 2013, while the Barclays Aggregate Bond Index, which tracks the performance of a higher-quality U.S. bond universe, returned -2.44%. Investors showed a rising preference for higher-yielding corporate paper over government bonds during the first half of 2013, helping the Bank of America Merrill Lynch High Yield Master II Index, which measures the performance of high-yield corporate bonds, to post a 1.50% return for the six months ended June 30, 2013. Three-month Treasury bills, generally regarded as essentially "risk free" by the markets, returned 0.03% in the first half of 2013. * Dividends are not guaranteed. 2 Pioneer Bond Fund | Annual Report | 6/30/13 There are certainly risks and uncertainties that continue to plague the global economy. Europe remains in recession and a number of countries in the emerging markets have experienced difficulties. Still, a potential ending of the European recession, continuing economic improvement in Japan in response to the new government's quantitative easing policies, and a "soft landing" of 7% growth in China could very well result in an improving global outlook over the remainder of 2013. There are also geopolitical worries abroad and political fights at home, and while most of the widely recognized risks we've outlined may already be "priced in" to the market, we believe investors should continue to expect market volatility. At Pioneer, we have long advocated the benefits of staying diversified and investing for the long term. And while diversification alone 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 global equity and bond markets, using in-depth research to identify undervalued individual securities, and using thoughtful risk management to construct portfolios which 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. Pioneer Bond Fund | Annual Report | 6/30/13 3 Portfolio Management Discussion | 6/30/13 The bond market, after enjoying strong performance during most of 2012, faced new challenges in the first half of 2013 due to a variety of concerns that led to declines in prices of Treasuries and other government securities. In that changing environment, credit-sensitive securities positively affected by the business cycle outperformed other sectors of the bond market, amid evidence of a sustained domestic economic recovery. In the following interview, Kenneth J. Taubes reviews the market environment and the factors that affected the performance of Pioneer Bond Fund during the 12 months ended June 30, 2013. Mr. Taubes, Chief Investment Officer, U.S., and a portfolio manager at Pioneer Investments, is responsible for the daily management of the Portfolio, along with Charles Melchreit, a senior vice president and a portfolio manager at Pioneer. Q How did the Fund perform during the 12 months ended June 30, 2013? A Pioneer Bond Fund's Class A shares returned 3.21% at net asset value during the 12 months ended June 30, 2013, while the Fund's benchmark, the Barclays Aggregate Bond Index (the Barclays Index), returned -0.69%. During the same period, the average return of the 85 mutual funds in Lipper's Corporate Debt, A-rated category was 0.44%. Q How would you describe the investment environment for fixed-income investors during the 12 months ended June 30, 2013? A The fiscal year began in the summer of 2012 amid growing confidence that the domestic economy would continue to grow and that interest rates-- especially short-term rates--were likely to remain low, thus encouraging further economic expansion. Earlier market fears that the economy might fall back into recession appeared to abate. As the period progressed, economic growth continued, although the improvements tended to occur more slowly than most observers hoped. While the economic rebound in the U.S. technically had started in late 2009, more general optimism that the recovery could sustain itself only started to take hold for many investors in late 2012 and early 2013. In that environment, credit-sensitive securities outperformed higher-quality investments, with high-yield corporate bonds continuing to post positive returns. Corporate securities issued by companies in certain interest-rate-sensitive industries--notably in the housing and automotive sectors-- benefited from an environment of low interest rates and an improving job market, which encouraged homebuyers and consumers in general. Despite the improving domestic economy, other factors did weigh on the market and affect bond prices during the 12-month period. The other factors included 4 Pioneer Bond Fund | Annual Report | 6/30/13 concerns about possible "contagion" effects of the continued sovereign-debt problems in the euro zone as well as the recession in Europe, and evidence of slowing growth trends in China and the effect that country's economic issues would have on other emerging economies. Moreover, extraordinarily low bond yields encouraged investors to consider purchasing other asset classes during the six-month period, notably equities. During a period in which uncertainties seemed to grow about economic issues in many foreign markets, the steady, if slow, growth of the U.S. economy led to increased confidence in the value of the U.S. dollar, which tended to appreciate in value relative to many other currencies. During the 12-month period, high-yield corporate bonds, in particular, delivered healthy results--especially over the first half of 2013, as only convertible bonds and bank loans outperformed high-yield corporates between January and June, 2013. A variety of concerns undermined the performance of Treasuries and other government securities during the 12-month period, as longer-term interest rates began to rise. Even investment-grade corporate bonds began struggling when longer-term rates moved higher--moves often fueled by speculation that the Federal Reserve Board (the Fed), given the steadily improving domestic economy, might consider tapering the pace of its accommodative monetary policies that had helped to keep interest rates low. Such speculation picked up in May of 2013 when Fed Chairman Ben Bernanke said that the central bank's quantitative easing program of buying Treasuries and other government securities might begin to be cut back as early as the end of 2013, depending on economic data trends. The Fed also continued to indicate, however, that short-term interest rates, as influenced by the federal funds rate, were likely to remain at record low levels for the foreseeable future. Bond prices tend to decline as yields rise, and so during the 12 months ended June 30, 2013, the yields on five-year Treasuries rose from 0.72% to 1.40%, while the yields of 10-year and 30-year Treasuries climbed from 1.65% to 2.49% and 2.75% to 3.50%, respectively. Q Could you discuss the factors that contributed to the Fund's outperformance relative to its benchmark during the 12 months ended June 30, 2013? A Although the Fund's performance was somewhat muted during the 12-month period, its performance was notably better than that of the overall market, primarily due to good asset allocation results. Throughout the 12-month period, the Fund's assets were focused on credit-sensitive securities. As market attitudes about the sustainability of the economic recovery grew stronger, investments affected by the credit-worthiness of corporations tended to hold up much better than government securities, which are more affected by moves in interest rates. Pioneer Bond Fund | Annual Report | 6/30/13 5 During the period, the Fund had substantially overweight positions in both high-yield and investment-grade corporates relative to the Barclays Index, and both of those asset classes outperformed. Performance also was helped by the Fund's out-of-benchmark exposures to other corporate-related securities, including commercial mortgages, bank loans and event-linked ("catastrophe") bonds issued by insurance companies. Both bank loans and catastrophe bonds feature floating-rate yields, which typically increase along with interest rates. That factor gives the two asset classes added price protection during times of rising interest rates. In addition to good asset allocation results, duration positioning gave further support to benchmark-relative performance. We maintained a shorter-than-benchmark duration in the Fund's portfolio during the period, as we focused on securities with shorter maturities, which are less sensitive to interest-rate changes than securities with longer maturities. (Duration is a measure of a portfolio's price-sensitivity to changes in interest rates.) At the end of the fiscal year, on June 30, 2013, the top asset allocations in the Fund's portfolio were to domestic corporate bonds (roughly 25%); government securities and collateralized mortgage obligations (a combined 40% between the two asset classes); and international corporate bonds (roughly 10%). Rounding out the top five was a roughly 8.5% portfolio allocation to asset-backed securities. Q What were some of the individual investments that had the largest effect on the Fund's performance during the 12 months ended June 30, 2013? A The Fund had generally strong security selection results among corporate bond holdings, with solid performance coming from bond positions in investment bank Goldman Sachs as well as bonds issued by Springfield Finance and insurers MetLife, Allstate and Hanover Group. In addition, the Fund's holdings of the convertible securities of WellPoint, a health care company that operates benefit programs, including Blue Cross and Blue Shield programs, throughout the country, fared well. Disappointing investments in the portfolio during the period included a non-agency mortgage security issued by Countrywide and two mortgage securities backed by a multi-family-project, which underperformed as the loans were refinanced earlier than projected. 6 Pioneer Bond Fund | Annual Report | 6/30/13 Q What is your investment outlook? A As we start a new fiscal year for the Fund, interest rates already have started rising. Such developments tend to erode the prices of government debt and other higher-rated securities. Nevertheless, we should not lose sight of the fact that rates are climbing because investors believe the economy is strengthening. That view is supported by a variety of economic indicators, including increases in private payrolls, housing sales, new car purchases and general consumer spending. Moreover we think that as time passes, the economic-slowing effects of higher tax rates implemented at the start of 2013 and government spending cutbacks made during the year will start to recede, and so it is possible that the economic recovery will pick up more steam. Given that view, we believe it continues to make sense for us to focus the Fund's investments on corporate debt, even if interest rates do increase further. Corporations with healthy financial balance sheets should do well as the economy continues to strengthen, and default rates on corporate bonds are likely to remain low in a recovering economy. We also believe we should maintain a lower-than-benchmark duration to protect the Fund against the effects of rising Treasury yields. We think the Fund is well positioned for an environment of persistent economic growth as we head into the second half of 2013. Pioneer Bond Fund | Annual Report | 6/30/13 7 Please refer to the Schedule of Investments on pages 20-73 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 fail- ure of the issuers of the underlying securities and their inability to meet their debt obligations. Prepayment risk is the chance that mortgage-backed bonds will be paid off early if falling interest rates prompt homeowners to refinance their mortgages. 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 associated with falling interest rates. Investments in high-yield or lower-rated securities are subject to greater-than- average risk. 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. 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. 8 Pioneer Bond Fund | Annual Report | 6/30/13 Portfolio Summary | 6/30/13 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 25.8% Collateralized Mortgage Obligations 19.9% U.S. Government Securities 19.7% International Corporate Bonds 10.0% Asset Backed Securities 8.6% Municipal Bonds 7.0% Senior Secured Loans 5.4% U.S. Preferred Stocks 1.7% Convertible Corporate Bonds 0.8% Warrants 0.6% Convertible Preferred Stocks 0.4% International Preferred Stocks 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 30.0% AA 9.6% A 15.5% BBB 28.5% BB 8.5% B 3.8% CCC 0.7% Not Rated 2.0% Cash Equivalent 1.4% Bond ratings are ordered highest to lowest in portfolio. Based on Standard & Poor's measures, AAA (highest possible rating) through BBB are considered investment grade; BB or lower ratings are considered non-investment grade. Cash equivalents and some bonds may not be rated. 10 Largest Holdings -------------------------------------------------------------------------------- (As a percentage of total long-term holdings)* 1. Fannie Mae, 3.0%, 8/1/42 1.47% -------------------------------------------------------------------------------- 2. Fannie Mae, 4.5%, 1/1/42 1.04 -------------------------------------------------------------------------------- 3. U.S. Treasury Bonds, 4.5%, 8/15/39 0.68 -------------------------------------------------------------------------------- 4. U.S. Treasury Bonds, 4.5%, 5/15/38 0.63 -------------------------------------------------------------------------------- 5. U.S. Treasury Bonds, 4.5%, 2/15/36 0.63 -------------------------------------------------------------------------------- 6. U.S. Treasury Notes, 0.25%, 9/15/15 0.63 -------------------------------------------------------------------------------- 7. U.S. Treasury Notes, 2.75%, 2/15/19 0.59 -------------------------------------------------------------------------------- 8. Goldman Sachs Capital II, Floating Rate Note, 6/1/43 0.55 -------------------------------------------------------------------------------- 9. U.S. Treasury Bonds, 4.25%, 5/15/39 0.55 -------------------------------------------------------------------------------- 10. U.S. Treasury Notes, 0.25%, 2/28/15 0.55 -------------------------------------------------------------------------------- * 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. Pioneer Bond Fund | Annual Report | 6/30/13 9 Prices and Distributions | 6/30/13 Net Asset Value per Share -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Class 6/30/13 6/30/12 -------------------------------------------------------------------------------- A $9.67 $9.73 -------------------------------------------------------------------------------- B $9.61 $9.67 -------------------------------------------------------------------------------- C $9.57 $9.63 -------------------------------------------------------------------------------- R $9.76 $9.82 -------------------------------------------------------------------------------- Y $9.58 $9.65 -------------------------------------------------------------------------------- Z $9.70 $9.76 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Class 6/30/13 12/20/12 -------------------------------------------------------------------------------- K* $9.67 $9.94 -------------------------------------------------------------------------------- Distributions per Share: 7/1/12-6/30/13 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Net Investment Short-Term Long-Term Class Income Capital Gains Capital Gains -------------------------------------------------------------------------------- A $0.3749 $ -- $ -- -------------------------------------------------------------------------------- B $0.2712 $ -- $ -- -------------------------------------------------------------------------------- C $0.2878 $ -- $ -- -------------------------------------------------------------------------------- K* $0.2118 $ -- $ -- -------------------------------------------------------------------------------- R $0.3379 $ -- $ -- -------------------------------------------------------------------------------- Y $0.3945 $ -- $ -- -------------------------------------------------------------------------------- Z $0.3952 $ -- $ -- -------------------------------------------------------------------------------- * Class K shares were first publicly offered on December 20, 2012. 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 11-17. 10 Pioneer Bond Fund | Annual Report | 6/30/13 Performance Update | 6/30/13 Class A Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Pioneer Bond Fund at public offering price, compared to that of the Barclays Aggregate Bond Index. Average Annual Total Returns (As of June 30, 2013) -------------------------------------------------------------------------------- Net Asset Public Offering Period Value (NAV) Price (POP) -------------------------------------------------------------------------------- 10 Years 5.41% 4.93% 5 Years 6.63 5.65 1 Year 3.21 -1.45 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated December 15, 2012) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 1.03% 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 6/30/2003 $ 9,550 $ 10,000 6/30/2004 $ 9,838 $ 10,032 6/30/2005 $ 10,591 $ 10,714 6/30/2006 $ 10,459 $ 10,628 6/30/2007 $ 11,014 $ 11,279 6/30/2008 $ 11,745 $ 12,082 6/30/2009 $ 12,056 $ 12,813 6/30/2010 $ 13,829 $ 14,029 6/30/2011 $ 14,808 $ 14,577 6/30/2012 $ 15,683 $ 15,666 6/30/2013 $ 16,186 $ 15,559 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, 2014, 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. Pioneer Bond Fund | Annual Report | 6/30/13 11 Performance Update | 6/30/13 Class B Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Pioneer Bond Fund, compared to that of the Barclays Aggregate Bond Index. Average Annual Total Returns (As of June 30, 2013) -------------------------------------------------------------------------------- If If Period Held Redeemed -------------------------------------------------------------------------------- 10 Years 4.39% 4.39% 5 Years 5.53 5.53 1 Year 2.15 -1.82 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated December 15, 2012) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 2.02% 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 6/30/2003 $ 10,000 $ 10,000 6/30/2004 $ 10,204 $ 10,032 6/30/2005 $ 10,889 $ 10,714 6/30/2006 $ 10,656 $ 10,628 6/30/2007 $ 11,110 $ 11,279 6/30/2008 $ 11,743 $ 12,082 6/30/2009 $ 11,934 $ 12,813 6/30/2010 $ 13,541 $ 14,029 6/30/2011 $ 14,351 $ 14,577 6/30/2012 $ 15,043 $ 15,666 6/30/2013 $ 15,366 $ 15,559 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, 2014, 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. 12 Pioneer Bond Fund | Annual Report | 6/30/13 Performance Update | 6/30/13 Class C Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Pioneer Bond Fund, compared to that of the Barclays Aggregate Bond Index. Average Annual Total Returns (As of June 30, 2013) -------------------------------------------------------------------------------- If If Period Held Redeemed -------------------------------------------------------------------------------- 10 Years 4.49% 4.49% 5 Years 5.67 5.67 1 Year 2.33 2.33 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated December 15, 2012) -------------------------------------------------------------------------------- Gross -------------------------------------------------------------------------------- 1.73% -------------------------------------------------------------------------------- [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 6/30/2003 $ 10,000 $ 10,000 6/30/2004 $ 10,211 $ 10,032 6/30/2005 $ 10,893 $ 10,714 6/30/2006 $ 10,666 $ 10,628 6/30/2007 $ 11,135 $ 11,279 6/30/2008 $ 11,780 $ 12,082 6/30/2009 $ 11,971 $ 12,813 6/30/2010 $ 13,602 $ 14,029 6/30/2011 $ 14,427 $ 14,577 6/30/2012 $ 15,165 $ 15,666 6/30/2013 $ 15,519 $ 15,559 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). The performance shown for Class C shares does not reflect the 1% front-end sales charge in effect prior to February 1, 2004. 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. Pioneer Bond Fund | Annual Report | 6/30/13 13 Performance Update | 6/30/13 Class K Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Pioneer Bond Fund, compared to that of the Barclays Aggregate Bond Index. Average Annual Total Returns (As of June 30, 2013) -------------------------------------------------------------------------------- If If Period Held Redeemed -------------------------------------------------------------------------------- 10 Years 5.43% 5.43% 5 Years 6.66 6.66 1 Year 3.38 3.38 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated December 15, 2012) -------------------------------------------------------------------------------- Gross -------------------------------------------------------------------------------- 0.56% -------------------------------------------------------------------------------- [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 6/30/2003 $ 10,000 $ 10,000 6/30/2004 $ 10,298 $ 10,032 6/30/2005 $ 11,086 $ 10,714 6/30/2006 $ 10,948 $ 10,628 6/30/2007 $ 11,529 $ 11,279 6/30/2008 $ 12,294 $ 12,082 6/30/2009 $ 12,620 $ 12,813 6/30/2010 $ 14,476 $ 14,029 6/30/2011 $ 15,501 $ 14,577 6/30/2012 $ 16,417 $ 15,666 6/30/2013 $ 16,972 $ 15,559 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. 14 Pioneer Bond Fund | Annual Report | 6/30/13 Performance Update | 6/30/13 Class R Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Pioneer Bond Fund, compared to that of the Barclays Aggregate Bond Index. Average Annual Total Returns (As of June 30, 2013) -------------------------------------------------------------------------------- If If Period Held Redeemed -------------------------------------------------------------------------------- 10 Years 5.11% 5.11% 5 Years 6.23 6.23 1 Year 2.80 2.80 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated December 15, 2012) -------------------------------------------------------------------------------- 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 6/30/2003 $ 10,000 $10,000 6/30/2004 $ 10,320 $10,032 6/30/2005 $ 11,070 $10,714 6/30/2006 $ 10,911 $10,628 6/30/2007 $ 11,462 $11,279 6/30/2008 $ 12,167 $12,082 6/30/2009 $ 12,453 $12,813 6/30/2010 $ 14,218 $14,029 6/30/2011 $ 15,167 $14,577 6/30/2012 $ 16,013 $15,666 6/30/2013 $ 16,461 $15,559 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, 2014, 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. Pioneer Bond Fund | Annual Report | 6/30/13 15 Performance Update | 6/30/13 Class Y Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $5 million investment made in Pioneer Bond Fund, compared to that of the Barclays Aggregate Bond Index. Average Annual Total Returns (As of June 30, 2013) -------------------------------------------------------------------------------- If If Period Held Redeemed -------------------------------------------------------------------------------- 10 Years 5.75% 5.75% 5 Years 6.89 6.89 1 Year 3.34 3.34 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated December 15, 2012) -------------------------------------------------------------------------------- Gross -------------------------------------------------------------------------------- 0.65% -------------------------------------------------------------------------------- [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 6/30/2003 $ 5,000,000 $ 5,000,000 6/30/2004 $ 5,173,826 $ 5,015,997 6/30/2005 $ 5,591,226 $ 5,357,162 6/30/2006 $ 5,547,839 $ 5,314,014 6/30/2007 $ 5,861,446 $ 5,639,267 6/30/2008 $ 6,266,692 $ 6,040,960 6/30/2009 $ 6,451,556 $ 6,406,251 6/30/2010 $ 7,423,127 $ 7,014,736 6/30/2011 $ 7,961,349 $ 7,288,411 6/30/2012 $ 8,460,742 $ 7,833,124 6/30/2013 $ 8,743,040 $ 7,779,255 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. 16 Pioneer Bond Fund | Annual Report | 6/30/13 Performance Update | 6/30/13 Class Z Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Pioneer Bond Fund, compared to that of the Barclays Aggregate Bond Index. Average Annual Total Returns (As of June 30, 2013) -------------------------------------------------------------------------------- If If Period Held Redeemed -------------------------------------------------------------------------------- 10 Years 5.60% 5.60% 5 Years 6.93 6.93 1 Year 3.41 3.41 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated December 15, 2012) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 0.83% 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 6/30/2003 $ 10,000 $ 10,000 6/30/2004 $ 10,298 $ 10,032 6/30/2005 $ 11,086 $ 10,714 6/30/2006 $ 10,948 $ 10,628 6/30/2007 $ 11,529 $ 11,279 6/30/2008 $ 12,336 $ 12,082 6/30/2009 $ 12,758 $ 12,813 6/30/2010 $ 14,631 $ 14,029 6/30/2011 $ 15,699 $ 14,577 6/30/2012 $ 16,676 $ 15,666 6/30/2013 $ 17,245 $ 15,559 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, 2014, 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. Pioneer Bond Fund | Annual Report | 6/30/13 17 Comparing Ongoing Fund Expenses As a shareowner in the Fund, you incur two types of costs: (1) ongoing costs, including management fees, distribution and/or service (12b-1) fees, and other Fund expenses; and (2) transaction costs, including sales charges (loads) on purchase payments. This example is intended to help you understand your ongoing expenses (in dollars) of investing in the Fund and to compare these costs with the ongoing costs of investing in other mutual funds. The example is based on an investment of $1,000 at the beginning of the Fund's latest six-month period and held throughout the six months. Using the Tables -------------------------------------------------------------------------------- Actual Expenses The first table below provides information about actual account values and actual expenses.You may use the information in this table, together with the amount you invested, to estimate the expenses that you paid over the period as follows: (1) Divide your account value by $1,000 Example: an $8,600 account value (divided by) $1,000 = 8.6 (2) Multiply the result in (1) above by the corresponding share class's number in the third row under the heading entitled "Expenses Paid During Period" to estimate the expenses you paid on your account during this period. Expenses Paid on a $1,000 Investment in Pioneer Bond Fund Based on actual returns from January 1, 2013 through June 30, 2013. --------------------------------------------------------------------------------------------------- Share Class A B C K R Y Z --------------------------------------------------------------------------------------------------- Beginning Account $1,000.00 $1,000.00 $1,000.00 $1,000.00 $1,000.00 $1,000.00 $1,000.00 Value on 1/1/13 --------------------------------------------------------------------------------------------------- Ending Account $1,032.10 $1,021.50 $1,023.30 $ 994.90 $1,028.00 $1,033.40 $1,034.10 Value (after expenses) on 6/30/13 --------------------------------------------------------------------------------------------------- Expenses Paid $ 4.19 $ 9.36 $ 8.47 $ 2.82 $ 6.17 $ 3.26 $ 3.21 During Period* --------------------------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized net expense ratio of 0.85%, 1.90%, 1.72%, 0.57%, 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). 18 Pioneer Bond Fund | Annual Report | 6/30/13 Hypothetical Example for Comparison Purposes The table below provides information about hypothetical account values and hypothetical expenses based on the Fund's actual expense ratio and an assumed rate of return of 5% per year before expenses,which is not the Fund's actual return.The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period.You may use this information to compare the ongoing costs of investing in the Fund and other funds.To do so,compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds. Please note that the expenses shown in the tables are meant to highlight your ongoing costs only and do not reflect any transaction costs,such as sales charges (loads) that are charged at the time of the transaction.Therefore,the table below is useful in comparing ongoing costs only and will not help you determine the relative total costs of owning different funds.In addition,if these transaction costs were included,your costs would have been higher. Expenses Paid on a $1,000 Investment in Pioneer Bond Fund Based on a hypothetical 5% per year return before expenses, reflecting the period from January 1, 2013 through June 30, 2013. --------------------------------------------------------------------------------------------------- Share Class A B C K R Y Z --------------------------------------------------------------------------------------------------- Beginning Account $1,000.00 $1,000.00 $1,000.00 $1,000.00 $1,000.00 $1,000.00 $1,000.00 Value on 1/1/13 --------------------------------------------------------------------------------------------------- Ending Account $1,020.58 $1,015.37 $1,016.27 $1,021.97 $1,018.60 $1,021.52 $1,021.57 Value (after expenses) on 6/30/13 --------------------------------------------------------------------------------------------------- Expenses Paid $ 4.26 $ 9.49 $ 8.60 $ 2.86 $ 6.26 $ 3.31 $ 3.26 During Period* --------------------------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized net expense ratio of 0.85%, 1.90%, 1.72%, 0.57%, 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 | 6/30/13 19 Schedule of Investments | 6/30/13 --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- CONVERTIBLE CORPORATE BONDS -- 0.8% HEALTH CARE EQUIPMENT & SERVICES -- 0.5% Health Care Services -- 0.1% 766,000 B+/B2 Omnicare, Inc., 3.25%, 12/15/35 $ 788,980 --------------------------------------------------------------------------------------------------------------------- Managed Health Care -- 0.4% 5,725,000 A-/NR WellPoint, Inc., 2.75%, 10/15/42 (144A) $ 7,127,625 ------------------- Total Health Care Equipment & Services $ 7,916,605 --------------------------------------------------------------------------------------------------------------------- SEMICONDUCTORS & SEMICONDUCTOR EQUIPMENT -- 0.3% Semiconductors -- 0.3% 4,725,000 A-/NR Intel Corp., 2.95%, 12/15/35 $ 5,141,391 ------------------- Total Semiconductors & Semiconductor Equipment $ 5,141,391 --------------------------------------------------------------------------------------------------------------------- TOTAL CONVERTIBLE CORPORATE BONDS (Cost $11,188,780) $ 13,057,996 --------------------------------------------------------------------------------------------------------------------- --------------------------------------------------------------------------------------------------------------------- Shares --------------------------------------------------------------------------------------------------------------------- PREFERRED STOCKS -- 2.0% BANKS -- 0.8% Diversified Banks -- 0.5% 64,000 6.50 A-/Baa1 US Bancorp, Floating Rate Note (Perpetual) $ 1,798,400 235,000 6.00 A-/Baa1 US Bancorp, Floating Rate Note (Perpetual) 6,441,350 ------------------- $ 8,239,750 --------------------------------------------------------------------------------------------------------------------- Regional Banks -- 0.3% 85,000 BBB/Baa2 BB&T Corp., 5.625% (Perpetual) $ 2,048,500 28,000 6.25 A-/NR CoBank ACB, Floating Rate Note (Perpetual) (144A) 2,890,126 ------------------- $ 4,938,626 ------------------- Total Banks $ 13,178,376 --------------------------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 0.2% Other Diversified Financial Services -- 0.2% 116,000 7.88 BB/Ba2 Citigroup Capital XIII, Floating Rate Note, 10/30/40 $ 3,230,600 ------------------- Total Diversified Financials $ 3,230,600 --------------------------------------------------------------------------------------------------------------------- INSURANCE -- 0.6% Life & Health Insurance -- 0.2% 153,800 7.38 BB+/WR Delphi Financial Group, Inc., Floating Rate Note, 5/15/37 $ 3,772,914 --------------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 20 Pioneer Bond Fund | Annual Report | 6/30/13 --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Rate (b) Ratings Shares (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- Property & Casualty Insurance -- 0.3% 50,000 5.95 BBB-/Ba1 Aspen Insurance Holdings, Ltd., Floating Rate Note (Perpetual) $ 1,275,000 147,475 5.10 BBB/Baa1 The Allstate Corp., Floating Rate Note, 1/15/53 3,773,885 ------------------- $ 5,048,885 --------------------------------------------------------------------------------------------------------------------- Reinsurance -- 0.2% 1,250,000 0.00 NR/NR Altair Re, Floating Rate Note, 4/30/16 $ 1,279,375 950,000 NR/NR Pangaea Re, 0.0%, 10/1/15 (d) 962,160 ------------------- $ 2,241,535 ------------------- Total Insurance $ 11,063,334 --------------------------------------------------------------------------------------------------------------------- UTILITIES -- 0.3% Electric Utilities -- 0.3% 164,000 BB+/Ba1 PPL Capital Funding, Inc., 5.9%, 4/30/73 $ 3,949,120 ------------------- Total Utilities $ 3,949,120 --------------------------------------------------------------------------------------------------------------------- TOTAL PREFERRED STOCKS (Cost $30,757,962) $ 31,421,430 --------------------------------------------------------------------------------------------------------------------- CONVERTIBLE PREFERRED STOCKS -- 0.4% BANKS -- 0.4% Diversified Banks -- 0.4% 5,610 BBB+/Ba1 Wells Fargo & Co., 7.5% (Perpetual) $ 6,698,340 ------------------- Total Banks $ 6,698,340 --------------------------------------------------------------------------------------------------------------------- TOTAL CONVERTIBLE PREFERRED STOCKS (Cost $5,839,986) $ 6,698,340 --------------------------------------------------------------------------------------------------------------------- --------------------------------------------------------------------------------------------------------------------- Principal Amount ($) --------------------------------------------------------------------------------------------------------------------- ASSET BACKED SECURITIES -- 8.5% MATERIALS -- 2.1% Diversified Metals & Mining -- 0.1% 881,218 NR/A1 BCMSC Trust 1998-A, 6.65%, 4/15/28 $ 907,940 366,749 BBB+/Baa1 Lehman ABS Manufactured Housing Contract Trust 2001-B, 5.873%, 4/15/40 397,892 ------------------- $ 1,305,832 --------------------------------------------------------------------------------------------------------------------- Precious Metals & Minerals -- 0.3% 1,293,093 6.50 BBB+/A2 ACE Securities Corp. Manufactured Housing Trust Series 2003-MH1, Floating Rate Note, 8/15/30 (144A) $ 1,346,815 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/13 21 Schedule of Investments | 6/30/13 (continued) --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- Precious Metals & Minerals -- (continued) 786,230 6.50 BB+/Baa2 ACE Securities Corp. Manufactured Housing Trust Series 2003-MH1, Floating Rate Note, 8/15/30 (144A) $ 788,177 700,000 NR/B1 Credit-Based Asset Servicing and Securitization LLC, 5.637%, 10/25/36 (Step) (144A) 674,852 892,456 0.89 AA+/Baa3 Credit-Based Asset Servicing and Securitization LLC, Floating Rate Note, 5/25/50 (144A) 878,225 808,952 A/NR Mid-State Capital Trust 2010-1, 5.25%, 12/15/45 (144A) 841,061 ------------------- $ 4,529,130 --------------------------------------------------------------------------------------------------------------------- Steel -- 1.7% 413,037 1.27 AAA/A1 Accredited Mortgage Loan Trust 2004-3, Floating Rate Note, 10/25/34 $ 387,888 1,961,218 0.46 BB+/Baa3 Aegis Asset Backed Securities Trust 2005-5, Floating Rate Note, 12/25/35 1,811,048 33,105 0.85 AA+/A3 Asset Backed Securities Corp. Home Equity, Floating Rate Note, 4/25/35 33,063 1,462,628 AAA/Aaa Bayview Financial Mortgage Pass-Through Trust 2006-A, 5.865%, 2/28/41 (Step) 1,563,681 1,486,142 0.65 AA/Aa2 Bayview Financial Mortgage Pass-Through Trust Series 2005-B, Floating Rate Note, 4/28/39 1,450,423 2,657,981 0.69 A+/Ba3 Bear Stearns Asset Backed Securities I Trust 2005-FR1, Floating Rate Note, 6/25/35 2,579,895 1,325,796 0.69 AA+/NR Bear Stearns Asset Backed Securities I Trust 2005-HE8, Floating Rate Note, 8/25/35 1,320,738 500,000 0.60 BBB+/Ba2 Bear Stearns Asset Backed Securities I Trust 2006-EC1, Floating Rate Note, 12/25/35 470,444 389,984 0.46 AA+/A1 Citigroup Mortgage Loan Trust 2006-HE1, Floating Rate Note, 1/25/36 384,064 3,743,197 0.59 AA+/Aa2 First NLC Trust 2005-2, Floating Rate Note, 9/25/35 3,635,820 1,684,660 0.44 B+/B3 GSAA Home Equity Trust 2005-11, Floating Rate Note, 10/25/35 1,670,273 729,839 0.60 AAA/Aaa Home Equity Asset Trust 2005-5, Floating Rate Note, 11/25/35 724,911 531,906 0.57 A+/Baa2 Home Equity Asset Trust 2005-7, Floating Rate Note, 1/25/36 508,170 744,428 0.38 AA+/Aa1 HSBC Home Equity Loan Trust USA 2007-2, Floating Rate Note, 7/20/36 721,950 The accompanying notes are an integral part of these financial statements. 22 Pioneer Bond Fund | Annual Report | 6/30/13 --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- Steel -- (continued) 1,907,917 1.39 A+/Aa2 HSBC Home Equity Loan Trust USA 2007-3, Floating Rate Note, 11/20/36 $ 1,903,873 1,193,178 NR/Baa1 Irwin Home Equity Loan Trust 2005-1, 5.32%, 6/25/35 (Step) 1,159,633 625,801 0.89 A/A2 Irwin Whole Loan Home Equity Trust 2005-C, Floating Rate Note, 3/25/25 566,895 313,037 0.25 CCC/Ca Morgan Stanley ABS Capital I Inc Trust 2007-HE3, Floating Rate Note, 12/25/36 154,192 519,350 0.34 B-/Caa2 Nationstar Home Equity Loan Trust 2007-A, Floating Rate Note, 3/25/37 482,556 908,073 0.54 AAA/Aaa New Century Home Equity Loan Trust Series 2005-1, Floating Rate Note, 3/25/35 880,804 952,679 0.45 NR/Aaa New Century Home Equity Loan Trust Series 2005-2, Floating Rate Note, 6/25/35 949,828 774,418 0.45 AA+/Aa3 Option One Mortgage Loan Trust 2005-4 Asset-Backed Certificates Series 2005-4, Floating Rate Note, 11/25/35 759,430 18,327 0.31 A+/Aa3 Option One Mortgage Loan Trust 2007-HL1, Floating Rate Note, 2/25/38 18,301 783,776 0.63 AA+/A1 RASC Series 2005-KS7 Trust, Floating Rate Note, 8/25/35 764,661 2,951,705 AA-/A2 Terwin Mortgage Trust Series TMTS 2005-16HE, 4.606%, 9/25/36 (Step) 3,109,887 ------------------- $ 28,012,428 ------------------- Total Materials $ 33,847,390 --------------------------------------------------------------------------------------------------------------------- TRANSPORTATION -- 0.1% Railroads -- 0.1% 1,714,844 A/NR Trinity Rail Leasing LP, 2.266%, 1/15/43 (144A) $ 1,736,010 ------------------- Total Transportation $ 1,736,010 --------------------------------------------------------------------------------------------------------------------- AUTOMOBILES & COMPONENTS -- 0.3% Automobile Manufacturers -- 0.3% 650,000 AA-/Aa2 AmeriCredit Automobile Receivables Trust 2010-4, 4.2%, 11/8/16 $ 675,082 800,000 A+/NR AmeriCredit Automobile Receivables Trust 2013-1, 1.57%, 1/8/19 778,590 500,000 NR/Aa3 AmeriCredit Automobile Receivables Trust, 4.04%, 7/10/17 521,772 656,452 A+/NR Santander Drive Auto Receivables Trust 2011-S2, 3.35%, 6/15/17 (144A) 659,734 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/13 23 Schedule of Investments | 6/30/13 (continued) --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- Automobile Manufacturers -- (continued) 1,450,000 A/A1 Santander Drive Auto Receivables Trust 2012-1, 3.78%, 11/15/17 $ 1,505,204 850,000 A/A1 Santander Drive Auto Receivables Trust 2012-5, 2.7%, 8/15/18 855,350 ------------------- $ 4,995,732 ------------------- Total Automobiles & Components $ 4,995,732 --------------------------------------------------------------------------------------------------------------------- CONSUMER DURABLES & APPAREL -- 0.1% Apparel, Accessories & Luxury Goods -- 0.1% 1,366,658 BBB/NR Icon Brands Holdings LLC 2012-1, 4.229%, 1/25/43 (144A) $ 1,345,072 ------------------- Total Consumer Durables & Apparel $ 1,345,072 --------------------------------------------------------------------------------------------------------------------- CONSUMER SERVICES -- 0.2% Hotels, Resorts & Cruise Lines -- 0.2% 1,676,315 A/NR Westgate Resorts 2012-2 LLC, 3.0%, 1/20/25 (144A) $ 1,697,269 1,687,226 NR/NR Westgate Resorts 2012-A LLC, 2.25%, 8/20/25 (144A) 1,689,863 443,722 A/NR Westgate Resorts LLC, 2.5%, 3/20/25 (144A) 446,634 ------------------- $ 3,833,766 ------------------- Total Consumer Services $ 3,833,766 --------------------------------------------------------------------------------------------------------------------- FOOD & STAPLES RETAILING -- 0.2% Food Retail -- 0.2% 2,988,750 BBB-/NR CKE Restaurant Holdings, Inc., 4.474%, 3/20/43 (144A) $ 2,986,664 ------------------- Total Food & Staples Retailing $ 2,986,664 --------------------------------------------------------------------------------------------------------------------- BANKS -- 3.6% Diversified Banks -- 0.0%+ 334,315 0.28 NR/Aa1 Wells Fargo Home Equity Asset-Backed Securities 2007-2 Trust, Floating Rate Note, 4/25/37 $ 332,164 --------------------------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- 3.6% 691,243 0.37 BB+/B3 ACE Securities Corp. Home Equity Loan Trust Series 2006-ASAP2, Floating Rate Note, 3/25/36 $ 665,679 2,261,208 3.47 NR/NR Bayview Opportunity Master Fund IIa Trust 2012-4NPL, Floating Rate Note, 7/28/32 (144A) 2,287,552 The accompanying notes are an integral part of these financial statements. 24 Pioneer Bond Fund | Annual Report | 6/30/13 --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 278,162 A/NR Beacon Container Finance LLC, 3.72%, 9/20/27 (144A) $ 277,353 169,453 AA/NR CarNow Auto Receivables Trust 2012-1, 2.09%, 1/15/15 (144A) 169,606 310,276 0.93 AA/A3 Carrington Mortgage Loan Trust Series 2005-NC1, Floating Rate Note, 2/25/35 304,347 183,361 0.59 AA+/Baa1 Carrington Mortgage Loan Trust Series 2005-NC4, Floating Rate Note, 9/25/35 179,840 2,357,966 BB-/B1 Citicorp Residential Mortgage Trust Series 2006-1, 5.939%, 7/25/36 (Step) 2,351,854 380,793 B+/B2 Citicorp Residential Mortgage Trust Series 2006-2, 5.775%, 9/25/36 (Step) 387,306 2,558,223 B-/B1 Citicorp Residential Mortgage Trust Series 2006-3, 5.703%, 11/25/36 (Step) 2,552,234 1,620,417 B-/B2 Citicorp Residential Mortgage Trust Series 2007-1, 5.892%, 3/25/37 (Step) 1,594,424 77,449 0.60 AAA/A3 Citigroup Mortgage Loan Trust, Inc., Floating Rate Note, 7/25/35 77,434 1,331,451 0.89 BBB-/Ba1 Countrywide Asset-Backed Certificates, Floating Rate Note, 12/25/34 1,319,347 1,935,480 5.07 BB+/Ba3 Countrywide Asset-Backed Certificates, Floating Rate Note, 2/25/36 2,010,987 37,725 0.30 BBB-/Ba3 Countrywide Asset-Backed Certificates, Floating Rate Note, 5/25/37 37,650 1,711,250 A/NR Cronos Containers Program, Ltd., 3.81%, 9/18/27 (144A) 1,708,897 448,366 BBB/Baa2 Drug Royalty II LP 1 2012-1, 4.474%, 1/15/25 (144A) 450,069 269,019 4.28 BBB/Baa2 Drug Royalty II LP 1 2012-1, Floating Rate Note, 1/15/25 (144A) 273,055 208,372 1.19 BBB/Ba1 Ellington Loan Acquisition Trust 2007-1, Floating Rate Note, 5/26/37 (144A) 208,311 139,609 0.99 BBB/Ba1 Ellington Loan Acquisition Trust 2007-1, Floating Rate Note, 5/27/37 (144A) 138,373 206,391 0.73 AAA/NR First Franklin Mortgage Loan Trust 2004-FF10, Floating Rate Note, 9/25/34 205,544 985,679 AAA/NR First Investors Auto Owner Trust 2012-2, 1.47%, 5/15/18 (144A) 991,153 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/13 25 Schedule of Investments | 6/30/13 (continued) --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 1,200,000 A/NR First Investors Auto Owner Trust 2013-1, 2.02%, 1/15/19 (144A) $ 1,166,035 732,215 0.65 AA+/A3 Fremont Home Loan Trust 2005-2, Floating Rate Note, 6/25/35 728,697 2,600,000 A/NR FRS I LLC, 3.08%, 4/15/43 (144A) 2,545,122 299,360 0.84 A/Baa3 GSAMP Trust 2005-HE2, Floating Rate Note, 3/25/35 297,309 17,583 0.57 A+/Aa1 GSAMP Trust 2005-WMC1, Floating Rate Note, 9/25/35 17,578 1,821,726 1.54 BBB+/Baa3 GSRPM Mortgage Loan Trust 2003-2, Floating Rate Note, 6/25/33 1,725,408 1,150,000 A/NR HLSS Servicer Advance Receivables Backed Notes, 1.644%, 1/15/44 (144A) 1,148,620 1,620,000 AA/NR HLSS Servicer Advance Receivables Backed Notes, 1.744%, 1/16/46 (144A) 1,602,666 800,000 BBB/NR HLSS Servicer Advance Receivables Backed Notes, 2.487%, 1/15/14 (144A) 800,000 750,000 A/NR HLSS Servicer Advance Receivables Backed Notes, 3.22%, 10/15/43 (144A) 752,625 224,000 A/NR HLSS Servicer Advance Receivables Backed Notes, 3.96%, 10/15/45 (144A) 230,026 3,048,000 NR/NR Horizon Funding Trust 2013-1, 3.0%, 5/15/18 (144A) 3,043,428 1,326,000 NR/Aaa Leaf Receivables Funding 8 LLC, 1.55%, 11/15/17 (144A) 1,330,270 2,203,000 NR/Aa2 Leaf Receivables Funding 8 LLC, 1.92%, 9/15/20 (144A) 2,223,598 2,115,028 2.44 A+/Baa1 Madison Avenue Manufactured Housing Contract, Floating Rate Note, 3/25/32 2,113,983 1,087,000 AAA/NR Nationstar Mortgage Advance Receivable Trust, 1.679%, 6/20/46 (144A) 1,085,836 711,599 5.91 AA/A3 Origen Manufactured Housing Contract Trust 2004-A, Floating Rate Note, 1/15/35 760,068 484,000 5.46 AAA/Aa3 Origen Manufactured Housing Contract Trust 2004-B, Floating Rate Note, 11/15/35 503,854 The accompanying notes are an integral part of these financial statements. 26 Pioneer Bond Fund | Annual Report | 6/30/13 --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 386,910 NR/A2 Oxford Finance Funding Trust 2012-1, 3.9%, 3/15/17 (144A) $ 390,295 526,376 0.89 AAA/Aaa PFS Financing Corp., Floating Rate Note, 10/17/16 (144A) 528,814 775,712 1.69 A/NR PFS Financing Corp., Floating Rate Note, 10/17/16 (144A) 781,870 1,308,192 0.44 B/Baa2 RAAC Series 2006-RP2 Trust, Floating Rate Note, 2/25/37 (144A) 1,250,427 521,911 0.38 A-/A2 RAAC Series 2006-SP1 Trust, Floating Rate Note, 9/25/45 510,845 320,955 0.38 B+/B2 RAMP Series 2006-NC1 Trust, Floating Rate Note, 1/25/36 311,535 210,497 A/NR Santander Drive Auto Receivables Trust 2010-1, 1.89%, 5/15/17 (144A) 211,153 1,815,626 AA/NR SNAAC Auto Receivables Trust 2013-1, 1.14%, 7/16/18 (144A) 1,812,574 1,400,000 A/NR SNAAC Auto Receivables Trust, 3.11%, 6/15/17 (144A) 1,414,435 298,863 A/NR STORE Master Funding LLC, 4.16%, 3/20/43 (144A) 294,193 2,071,589 A/NR STORE Master Funding LLC, 5.77%, 8/20/42 (144A) 2,123,316 1,954,658 0.39 CCC/Ba3 Structured Asset Investment Loan Trust 2006-1, Floating Rate Note, 1/25/36 1,891,204 3,965,775 0.41 B-/Baa3 Structured Asset Securities Corp Mortgage Loan Trust 2006-GEL4, Floating Rate Note, 10/25/36 (144A) 3,808,952 543,059 A+/Baa2 Structured Asset Securities Corp., 4.77%, 10/25/34 (Step) 554,782 953,007 A+/NR SVO 2012-A VOI Mortgage LLC, 2.0%, 9/20/29 (144A) 946,387 ------------------- $ 57,096,920 ------------------- Total Banks $ 57,429,084 --------------------------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 1.9% Other Diversified Financial Services -- 0.7% 1,900,000 A/A1 Capital Auto Receivables Asset Trust 2013-1, 1.74%, 10/22/18 $ 1,864,212 1,400,000 BBB/NR DT Auto Owner Trust 2011-1, 4.89%, 1/17/17 (144A) 1,422,166 1,000,000 AA/NR DT Auto Owner Trust 2012-1, 2.26%, 10/16/17 (144A) 1,002,911 156,110 0.43 AA+/A1 JP Morgan Mortgage Acquisition Corp 2005-OPT2, Floating Rate Note, 12/25/35 155,619 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/13 27 Schedule of Investments | 6/30/13 (continued) --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- Other Diversified Financial Services -- (continued) 800,000 AA/NR Prestige Auto Receivables Trust 2011-1, 3.9%, 7/16/18 (144A) $ 820,681 1,950,741 A+/NR Sierra Timeshare 2012-2 Receivables Funding LLC, 2.38%, 3/20/29 (144A) 1,965,963 519,137 A+/NR Sierra Timeshare 2012-3 Receivables Funding LLC, 1.87%, 8/20/29 (144A) 520,341 2,800,000 A/NR Springleaf Funding Trust 2013-A, 2.58%, 9/15/21 (144A) 2,751,000 971,667 A-/NR Textainer Marine Containers, Ltd., 4.21%, 4/15/27 (144A) 984,970 ------------------- $ 11,487,863 --------------------------------------------------------------------------------------------------------------------- Specialized Finance -- 0.6% 1,400,000 1.06 AAA/Aaa Ally Master Owner Trust, Floating Rate Note, 1/15/16 $ 1,402,106 4,881,719 BBB+/Baa1 Domino's Pizza Master Issuer LLC, 5.216%, 1/25/42 (144A) 5,211,494 1,659,000 0.63 NR/Aaa GE Dealer Floorplan Master Note Trust, Floating Rate Note, 10/20/17 1,647,080 554,333 NR/A2 Hercules Capital Funding Trust 2012-1, 3.32%, 12/16/17 (144A) 556,412 853,290 NR/Aaa JG Wentworth XXII LLC, 3.82%, 12/15/48 (144A) 892,871 ------------------- $ 9,709,963 --------------------------------------------------------------------------------------------------------------------- Consumer Finance -- 0.5% 428,000 BBB/NR American Credit Acceptance Receivables Trust 2012-2, 4.05%, 2/15/18 (144A) $ 431,469 1,684,084 A+/NR American Credit Acceptance Receivables Trust, 1.64%, 11/15/16 (144A) 1,681,735 1,534,090 NR/Aa3 California Republic Auto Receivables Trust 2012-1, 1.18%, 8/15/17 (144A) 1,530,370 800,000 1.49 AAA/Aaa Chase Issuance Trust, Floating Rate Note, 8/17/15 801,119 908,333 A/NR Global SC Finance II SRL, 4.11%, 7/19/27 (144A) 913,108 1,350,000 NR/Aaa Santander Drive Auto Receivables Trust 2011-2, 2.66%, 1/15/16 1,363,293 900,000 1.03 AAA/Aaa SLM Student Loan Trust 2004-10, Floating Rate Note, 4/27/26 (144A) 898,830 ------------------- $ 7,619,924 --------------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 28 Pioneer Bond Fund | Annual Report | 6/30/13 --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- Asset Management & Custody Banks -- 0.1% 1,150,250 A/NR Triton Container Finance LLC, 4.21%, 5/14/27 (144A) $ 1,155,451 --------------------------------------------------------------------------------------------------------------------- Investment Banking & Brokerage -- 0.0%+ 700,000 0.64 NR/Aaa Chesapeake Funding LLC, Floating Rate Note, 5/7/24 (144A) $ 698,576 400,000 1.34 NR/Aa2 Chesapeake Funding LLC, Floating Rate Note, 5/7/24 (144A) 398,486 ------------------- $ 1,097,062 ------------------- Total Diversified Financials $ 31,070,263 --------------------------------------------------------------------------------------------------------------------- TOTAL ASSET BACKED SECURITIES (Cost $136,025,536) $ 137,243,981 --------------------------------------------------------------------------------------------------------------------- COLLATERALIZED MORTGAGE OBLIGATIONS -- 19.6% CONSUMER SERVICES -- 0.0%+ Hotels, Resorts & Cruise Lines -- 0.0%+ 303,968 NR/Baa3 S2 Hospitality LLC, 4.5%, 4/15/25 (144A) $ 303,611 ------------------- Total Consumer Services $ 303,611 --------------------------------------------------------------------------------------------------------------------- BANKS -- 14.3% Thrifts & Mortgage Finance -- 14.3% 1,750,000 NR/NR A10 Securitization 2013-1 LLC, 2.4%, 11/15/25 (144A) $ 1,734,436 782,114 0.64 CCC/NR Alternative Loan Trust 2003-14T1, Floating Rate Note, 8/25/18 736,524 1,505,752 BBB+/NR Alternative Loan Trust 2003-21T1, 5.75%, 12/25/33 1,551,208 752,076 BB-/B2 Alternative Loan Trust 2003-J1, 4.75%, 10/25/33 767,203 1,464,695 B-/NR Alternative Loan Trust 2004-14T2, 5.5%, 8/25/34 1,445,842 886,436 CCC/B2 Alternative Loan Trust 2004-28CB, 5.5%, 1/25/35 901,100 661,694 BBB+/Ba3 Alternative Loan Trust 2004-2CB, 5.125%, 3/25/34 667,269 813,237 BB+/Ba2 Alternative Loan Trust 2004-4CB, 4.25%, 4/25/34 815,847 490,774 0.46 BB+/B2 Alternative Loan Trust 2004-8CB, Floating Rate Note, 6/25/34 438,039 3,714,858 0.63 A+/Ba1 Alternative Loan Trust 2005-J4, Floating Rate Note, 7/25/35 3,521,529 897,007 A+/Baa2 Banc of America Alternative Loan Trust 2003-2, 5.75%, 4/25/33 973,038 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/13 29 Schedule of Investments | 6/30/13 (continued) --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 1,832,941 NR/Baa2 Banc of America Alternative Loan Trust 2003-7, 5.5%, 9/25/33 $ 1,865,521 1,086,594 NR/B1 Banc of America Alternative Loan Trust 2004-10, 5.5%, 11/25/19 1,100,171 1,274,600 NR/Ba3 Banc of America Alternative Loan Trust 2004-12, 5.5%, 1/25/20 1,295,161 1,406,380 NR/B3 Banc of America Alternative Loan Trust 2004-2, 5.5%, 3/25/19 1,444,373 1,853,990 NR/Ba2 Banc of America Alternative Loan Trust 2004-2, 6.0%, 3/25/34 1,911,898 983,279 NR/B2 Banc of America Alternative Loan Trust 2004-4, 5.25%, 5/25/34 999,081 1,733,098 NR/Ba3 Banc of America Alternative Loan Trust 2004-6, 5.0%, 7/25/19 1,767,624 1,202,785 BBB+/NR Banc of America Funding 2003-3 Trust, 5.5%, 10/25/33 1,264,206 1,557,860 CCC/NR Banc of America Funding 2005-8 Trust, 5.5%, 1/25/36 1,527,256 1,203,574 0.32 BB-/A Banc of America Funding 2010-R4 Trust, Floating Rate Note, 8/26/36 (144A) 1,175,218 220,162 0.30 AAA/NR Banc of America Funding 2010-R4 Trust, Floating Rate Note, 9/26/46 (144A) 219,596 400,000 1.29 A-/Aaa Banc of America Large Loan Trust 2007-BMB1, Floating Rate Note, 8/15/29 (144A) 396,347 763,182 3.08 NR/Baa3 Banc of America Mortgage 2003-H Trust, Floating Rate Note, 9/25/33 758,306 7,965,417 NR/Caa2 Bayview Commercial Asset Trust, 3.89%, 9/25/37 (Step) (144A)(c) 733,615 11,785,993 4.70 NR/Caa2 Bayview Commercial Asset Trust, Floating Rate Note, 7/25/37 (144A)(c) 589,300 996,701 2.98 NR/NR Bayview Opportunity Master Fund Trust IIB LP, Floating Rate Note, 1/28/33 (144A) 996,701 354,374 2.59 NR/NR BCAP LLC 2010-RR10 Trust, Floating Rate Note, 12/27/34 (144A) 359,496 167,649 2.89 NR/NR BCAP LLC 2010-RR11-I Trust, Floating Rate Note, 6/27/36 (144A) 167,869 3,656,404 0.79 A+/Ba3 Bear Stearns ALT-A Trust 2004-4, Floating Rate Note, 6/25/34 3,381,142 1,239,307 0.75 AA+/Baa3 Bear Stearns ALT-A Trust 2005-1, Floating Rate Note, 1/25/35 1,194,509 1,342,456 2.34 AA+/Baa2 Bear Stearns ARM Trust 2003-5, Floating Rate Note, 8/25/33 1,304,750 The accompanying notes are an integral part of these financial statements. 30 Pioneer Bond Fund | Annual Report | 6/30/13 --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 1,000,000 5.21 NR/Baa2 Bear Stearns Commercial Mortgage Securities Trust 2005-PWR7, Floating Rate Note, 2/11/41 $ 1,017,259 2,131,070 0.89 AA+/A3 Bella Vista Mortgage Trust 2004-1, Floating Rate Note, 11/20/34 1,963,219 165,768 A+/Baa1 Chase Mortgage Finance Trust Series 2003-S11, 5.0%, 10/25/33 171,333 1,036,825 4.79 A+/Ba1 CHL Mortgage Pass-Through Trust 2003-56, Floating Rate Note, 12/25/33 1,030,615 1,003,554 NR/Baa3 CHL Mortgage Pass-Through Trust 2004-9, 5.25%, 6/25/34 1,017,453 1,500,000 0.36 AA/Aaa Citigroup Commercial Mortgage Trust 2007-FL3A, Floating Rate Note, 4/15/22 (144A) 1,479,968 2,048,663 2.36 BBB-/NR Citigroup Mortgage Loan Trust, Inc., Floating Rate Note, 8/25/34 2,043,242 1,000,000 4.65 AA-/A1 City Center Trust 2011-CCHP, Floating Rate Note, 7/15/28 (144A) 1,000,821 819,873 0.63 BBB+/A2 CNL Commercial Mortgage Loan Trust 2003-2, Floating Rate Note, 10/25/30 (144A) 714,764 645,185 0.49 AAA/Aaa COMM 2005-FL11 Mortgage Trust, Floating Rate Note, 11/15/17 (144A) 643,572 1,377,109 0.53 AAA/Aaa COMM 2005-FL11 Mortgage Trust, Floating Rate Note, 11/15/17 (144A) 1,370,223 4,212,966 0.32 AA-/A1 COMM 2006-FL12 Mortgage Trust, Floating Rate Note, 12/15/20 (144A) 4,118,229 2,550,108 0.37 A+/A1 COMM 2007-FL14 Mortgage Trust, Floating Rate Note, 6/15/22 (144A) 2,528,919 850,000 NR/Aaa COMM 2012-CCRE2 Mortgage Trust, 3.147%, 8/15/45 812,745 450,000 NR/Aaa COMM 2012-CCRE2 Mortgage Trust, 3.791%, 8/15/45 442,281 915,000 AAA/Aaa COMM 2012-CCRE4 Mortgage Trust, 2.436%, 10/15/22 870,627 3,500,000 NR/Aaa COMM 2012-LC4 Mortgage Trust, 4.063%, 12/10/44 3,500,304 1,900,000 AAA/Aaa COMM 2013-LC6 Mortgage Trust, 2.941%, 1/10/46 1,768,970 3,954,373 2.14 AAA/NR Commercial Mortgage Pass Through Certificates, Floating Rate Note, 11/17/26 (144A) 3,980,915 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/13 31 Schedule of Investments | 6/30/13 (continued) --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 439,466 0.56 AA+/Aa3 DSLA Mortgage Loan Trust 2004-AR3, Floating Rate Note, 7/19/44 $ 400,779 1,100,000 1.29 AA-/NR Extended Stay America Trust 2013-ESH, Floating Rate Note, 12/5/31 (144A) 1,092,879 364,097 5.71 NR/Baa1 First Horizon Mortgage Pass-Through Trust 2004-AR5, Floating Rate Note, 10/25/34 359,467 509,891 2.66 BB-/B1 First Horizon Mortgage Pass-Through Trust 2005-AR1, Floating Rate Note, 4/25/35 502,117 103,617 CCC/NR First Horizon Mortgage Pass-Through Trust 2006-1, 6.0%, 5/25/36 102,662 853,626 0.36 A/Aa3 GE Business Loan Trust 2007-1, Floating Rate Note, 4/16/35 (144A) 791,738 419,885 BB/Caa3 Global Mortgage Securitization, Ltd., 5.25%, 4/25/32 397,106 800,000 5.31 A/A1 GMAC Commercial Mortgage Securities Inc Series 2003-C3 Trust, Floating Rate Note, 4/10/40 809,276 3,375,000 AAA/NR GMAC Commercial Mortgage Securities Inc Series 2004-C3 Trust, 4.864%, 12/10/41 3,522,430 1,000,000 AA-/NR GS Mortgage Securities Corp. II, 3.682%, 2/10/46 (144A) 915,877 1,550,000 1.94 NR/A3 GS Mortgage Securities Corp. II, Floating Rate Note, 11/8/29 (144A) 1,533,852 1,250,000 NR/Aaa GS Mortgage Securities Corp. II, 3.377%, 5/10/45 1,232,018 900,000 NR/Aaa GS Mortgage Securities Corp. II, 5.56%, 11/10/39 996,747 3,000,000 1.26 AAA/Aaa GS Mortgage Securities Corp. II, Floating Rate Note, 3/6/20 (144A) 3,007,557 700,000 2.20 AA/NR GS Mortgage Securities Corp. II, Floating Rate Note, 3/6/20 (144A) 702,385 1,651,292 2.46 A+/NR GSR Mortgage Loan Trust 2003-9, Floating Rate Note, 8/25/33 1,628,572 268,066 5.73 B/NR GSR Mortgage Loan Trust 2004-3F, Floating Rate Note, 2/25/34 261,431 1,714,345 2.79 A+/B1 GSR Mortgage Loan Trust 2004-7, Floating Rate Note, 6/25/34 1,698,634 392,224 2.97 BBB+/NR GSR Mortgage Loan Trust 2005-AR1, Floating Rate Note, 1/25/35 380,522 3,044,184 0.54 AA+/Aa3 Homestar Mortgage Acceptance Corp., Floating Rate Note, 6/25/34 2,884,395 772,732 0.91 BBB/Baa2 Impac CMB Trust Series 2004-5, Floating Rate Note, 10/25/34 749,004 The accompanying notes are an integral part of these financial statements. 32 Pioneer Bond Fund | Annual Report | 6/30/13 --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Amount ($) Rate (b) Ratings Principal (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 536,585 0.99 BB+/Ba1 Impac CMB Trust Series 2004-6, Floating Rate Note, 10/25/34 $ 453,759 983,403 0.97 BBB/Baa1 Impac CMB Trust Series 2004-6, Floating Rate Note, 10/25/34 935,086 2,711,384 0.93 BBB+/A3 Impac CMB Trust Series 2004-7, Floating Rate Note, 11/25/34 2,577,114 834,477 0.95 B/Ba2 Impac CMB Trust Series 2004-9, Floating Rate Note, 1/25/35 756,846 2,214,401 0.99 AAA/Aaa Impac Secured Assets CMN Owner Trust, Floating Rate Note, 11/25/34 2,023,218 875,019 0.54 AAA/Aaa Impac Secured Assets Trust 2006-1, Floating Rate Note, 5/25/36 855,146 612,555 0.54 AAA/Aaa Impac Secured Assets Trust 2006-2, Floating Rate Note, 8/25/36 576,556 2,800,000 2.56 A/A2 JP Morgan Chase Commercial Mortgage Securities Corp., Floating Rate Note, 10/15/25 (144A) 2,815,212 1,100,000 0.35 AA/Aa3 JP Morgan Chase Commercial Mortgage Securities Trust 2006-LDP9, Floating Rate Note, 5/15/47 1,096,212 131,314 0.57 NR/Aa1 JP Morgan Chase Commercial Mortgage Securities Trust 2007-FL1, Floating Rate Note, 7/15/19 (144A) 127,802 1,600,000 AAA/NR JP Morgan Chase Commercial Mortgage Securities Trust 2010-C2, 3.616%, 11/15/43 (144A) 1,688,821 1,350,000 NR/Aaa JP Morgan Chase Commercial Mortgage Securities Trust 2011-C5, 4.171%, 8/15/46 1,408,977 1,672,860 2.09 AAA/Aaa JP Morgan Chase Commercial Mortgage Securities Trust 2011-FL1, Floating Rate Note, 11/15/28 (144A) 1,675,011 900,000 3.98 AA/NR JP Morgan Chase Commercial Mortgage Securities Trust 2012-C8, Floating Rate Note, 10/15/45 (144A) 861,514 1,500,000 1.99 A-/NR JP Morgan Chase Commercial Mortgage Series Trust 2013-FL3, Floating Rate Note, 4/15/28 (144A) 1,469,358 1,516,269 2.14 A+/Baa1 JP Morgan Mortgage Trust 2003-A1, Floating Rate Note, 10/25/33 1,515,450 1,506,717 4.44 A+/Baa1 JP Morgan Mortgage Trust 2003-A1, Floating Rate Note, 10/25/33 1,501,326 2,513,032 2.52 AA+/Baa3 JP Morgan Mortgage Trust 2004-A1, Floating Rate Note, 2/25/34 2,536,400 1,024,434 4.75 AA+/Baa1 JP Morgan Mortgage Trust 2004-A1, Floating Rate Note, 2/25/34 1,016,086 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/13 33 Schedule of Investments | 6/30/13 (continued) --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Amount ($) Rate (b) Ratings Principal (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 315,256 2.84 A+/NR JP Morgan Mortgage Trust 2004-A2, Floating Rate Note, 5/25/34 $ 311,539 1,330,835 2.61 AA+/Baa2 JP Morgan Mortgage Trust 2004-A5, Floating Rate Note, 12/25/34 1,327,578 463,488 2.35 BBB+/Ba1 JP Morgan Mortgage Trust 2005-A4, Floating Rate Note, 7/25/35 456,434 972,832 3.50 AAA/NR JP Morgan Mortgage Trust 2013-2, Floating Rate Note, 5/25/43 (144A) 950,401 1,898,326 5.62 BBB+/NR LB-UBS Commercial Mortgage Trust 2002-C4, Floating Rate Note, 10/15/35 (144A) 1,893,460 1,464,989 AAA/Aaa LB-UBS Commercial Mortgage Trust 2004-C1, 4.568%, 1/15/31 1,489,179 1,605,866 AAA/Aaa LB-UBS Commercial Mortgage Trust 2005-C3, 4.664%, 7/15/30 1,623,380 473,293 0.89 AA/Aaa Lehman Brothers Floating Rate Commercial Mortgage Trust 2007-LLF C5, Floating Rate Note, 6/15/22 (144A) 473,293 550,000 1.09 BBB+/A1 Lehman Brothers Floating Rate Commercial Mortgage Trust 2007-LLF C5, Floating Rate Note, 6/15/22 (144A) 548,449 13,165 5.41 AAA/Aaa Lehman Brothers Small Balance Commercial Mortgage Trust 2006-3, Floating Rate Note, 12/25/36 (144A) 13,204 87,155 1.04 AAA/Aaa Lehman Brothers Small Balance Commercial Mortgage Trust 2007-3 Class 1A2, Floating Rate Note, 10/25/37 (144A) 86,781 397,390 1.14 A+/Aa1 Lehman Brothers Small Balance Commercial Mortgage Trust 2007-3 Class 1A4, Floating Rate Note, 10/25/37 (144A) 394,515 2,413,732 0.44 A+/Aa1 Lehman Brothers Small Balance Commercial, Floating Rate Note, 2/25/30 (144A) 2,075,809 659,959 0.44 A+/Aa3 Lehman Brothers Small Balance Commercial, Floating Rate Note, 9/25/30 (144A) 573,637 1,430,000 1.29 A+/B1 MASTR Adjustable Rate Mortgages Trust 2004-11, Floating Rate Note, 11/25/34 1,267,761 1,145,091 5.29 B-/B3 MASTR Adjustable Rate Mortgages Trust, Floating Rate Note, 1/25/35 1,110,389 1,141,016 BB+/NR MASTR Alternative Loan Trust 2004-10, 5.5%, 10/25/19 1,172,357 The accompanying notes are an integral part of these financial statements. 34 Pioneer Bond Fund | Annual Report | 6/30/13 --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 190,182 AAA/NR MASTR Alternative Loan Trust 2004-13, 4.5%, 1/25/15 $ 190,476 343,384 B+/NR MASTR Alternative Loan Trust 2004-13, 5.5%, 1/25/35 350,679 2,644,119 B-/NR MASTR Alternative Loan Trust 2004-6, 6.0%, 7/25/34 2,715,505 1,853,486 A+/NR MASTR Alternative Loan Trust 2005-1, 5.5%, 2/25/35 1,850,466 988,320 6.60 A-/NR MASTR Seasoned Securitization Trust 2005-1, Floating Rate Note, 9/25/32 1,035,492 1,328,559 0.65 A+/A3 Merrill Lynch Mortgage Investors Trust Series MLCC 2004-A, Floating Rate Note, 4/25/29 1,284,826 339,461 2.44 BBB/B1 Merrill Lynch Mortgage Investors Trust Series MLCC 2005-2, Floating Rate Note, 10/25/35 336,929 2,946,574 0.65 AA+/Ba3 Merrill Lynch Mortgage Investors Trust Series MLCC 2005-A, Floating Rate Note, 3/25/30 2,756,953 690,932 5.24 AAA/NR Merrill Lynch Mortgage Trust Class A4, Floating Rate Note, 11/12/35 695,431 3,937,777 0.47 A+/Ba2 Morgan Stanley Mortgage Loan Trust 2005-6AR, Floating Rate Note, 11/25/35 3,674,288 2,950,000 NR/NR Morgan Stanley Re-REMIC Trust 2010-R9, 5.0%, 11/26/36 (144A) 3,083,782 3,124,990 0.97 AA+/Baa1 MortgageIT Trust 2004-1, Floating Rate Note, 11/25/34 2,971,022 392,742 0.49 BBB+/Baa3 MortgageIT Trust 2005-3, Floating Rate Note, 8/25/35 357,996 2,856,062 1.39 AAA/Aaa NorthStar 2012-1 Mortgage Trust, Floating Rate Note, 8/25/29 (144A) 2,847,176 871,068 0.44 BB+/B2 Opteum Mortgage Acceptance Corp Asset Backed Pass-Through Certificates 2005-5, Floating Rate Note, 12/25/35 856,250 743,895 NR/A2 PHH Mortgage Capital LLC, 6.6%, 12/25/27 (Step) (144A) 746,403 569,515 BB+/Caa1 RAAC Series 2004-SP2 Trust, 6.0%, 1/25/32 580,884 750,431 1.59 B-/Ba3 RESI Finance LP, Floating Rate Note, 9/10/35 (144A) 660,534 541,268 B-/NR Residential Asset Securitization Trust 2004-A10, 5.5%, 2/25/35 550,766 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/13 35 Schedule of Investments | 6/30/13 (continued) --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 698,346 BBB/NR Residential Asset Securitization Trust 2004-A8, 5.25%, 11/25/34 $ 729,960 1,824,091 B/NR Residential Asset Securitization Trust 2004-A9, 5.75%, 12/25/34 1,871,754 1,521,579 CCC/NR Residential Asset Securitization Trust 2005-A9, 5.5%, 7/25/35 1,483,482 1,232,514 NR/B3 RFMSI Series 2005-S5 Trust, 5.25%, 7/25/35 1,240,954 4,000,000 5.69 NR/C SASCO 2007-BHC1 Trust, Floating Rate Note, 12/18/49 (144A) 550,560 2,004,076 2.67 BBB+/B2 SASCO Mortgage Pass-Through Certificates Series 2004-S4, Floating Rate Note, 12/25/34 2,023,315 3,618,376 0.85 AA+/Baa1 Sequoia Mortgage Trust 2003-2, Floating Rate Note, 6/20/33 3,596,904 1,519,886 0.81 AA+/Baa3 Sequoia Mortgage Trust 2003-5, Floating Rate Note, 9/20/33 1,487,659 1,254,392 0.70 AA/A3 Sequoia Mortgage Trust 2004-12, Floating Rate Note, 1/20/35 1,157,738 1,523,792 0.41 BBB+/Ba3 Sequoia Mortgage Trust 2005-2, Floating Rate Note, 3/20/35 1,396,176 819,892 3.00 AAA/NR Sequoia Mortgage Trust 2013-7, Floating Rate Note, 6/25/43 774,071 891,000 3.00 NR/Aaa Sequoia Mortgage Trust, Floating Rate Note, 6/25/43 840,254 456,367 NR/Baa3 SMA Issuer I LLC, 3.5%, 8/20/25 (144A) 458,395 2,548,560 2.22 AAA/NR Springleaf Mortgage Loan Trust 2012-2, Floating Rate Note, 10/25/57 (144A) 2,585,532 750,000 3.79 A-/NR Springleaf Mortgage Loan Trust, Floating Rate Note, 6/25/58 (144A) 752,204 4,238,549 0.87 AA+/A2 Structured Asset Mortgage Investments II Trust 2004-AR8, Floating Rate Note, 5/19/35 4,025,842 1,376,457 0.93 A+/Ba1 Structured Asset Mortgage Investments Trust 2003-AR2, Floating Rate Note, 12/19/33 1,267,361 1,244,332 2.70 A+/Baa3 Structured Asset Securities Corp. Mortgage Certificates Series 2003-31A, Floating Rate Note, 10/25/33 1,240,387 1,322,347 0.84 NR/NR Structured Asset Securities Corp. Reverse Mortgage Loan Trust 2002-RM1, Floating Rate Note, 10/25/37 (144A) 1,305,818 1,049,788 2.73 NR/Baa2 Thornburg Mortgage Securities Trust 2003-3, Floating Rate Note, 6/25/43 1,031,397 The accompanying notes are an integral part of these financial statements. 36 Pioneer Bond Fund | Annual Report | 6/30/13 --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 3,962,157 0.93 BBB+/Baa3 Thornburg Mortgage Securities Trust 2004-3, Floating Rate Note, 9/25/44 $ 3,756,921 1,399,427 0.77 BBB+/A1 Thornburg Mortgage Securities Trust 2004-4, Floating Rate Note, 12/25/44 1,249,019 1,064,427 4.10 AAA/Ba1 Thornburg Mortgage Securities Trust Class II4A, Floating Rate Note, 3/25/44 1,059,722 4,470,000 AAA/Aa1 Timberstar Trust, 5.668%, 10/15/36 (144A) 5,001,993 1,435,000 AA/Aa3 Timberstar Trust, 5.747%, 10/15/36 (144A) 1,574,789 282,973 0.77 BB+/Aaa UBS Commercial Mortgage Trust 2007-FL1, Floating Rate Note, 7/15/24 (144A) 282,449 3,787,250 AAA/Aaa Wachovia Bank Commercial Mortgage Trust Series 2004-C15, 4.803%, 10/15/41 3,936,081 198,741 2.22 NR/Ba3 WaMu Mortgage Pass Through Certificates, Floating Rate Note, 2/27/34 160,601 1,711,179 2.56 A+/Ba2 WaMu Mortgage Pass Through Certificates, Floating Rate Note, 3/25/34 1,683,292 2,540,277 2.50 BBB/NR WaMu Mortgage Pass Through Certificates, Floating Rate Note, 3/25/35 2,494,003 3,025,464 2.44 A+/A2 WaMu Mortgage Pass Through Certificates, Floating Rate Note, 6/25/33 3,038,634 1,146,762 2.46 BB+/Ba1 WaMu Mortgage Pass Through Certificates, Floating Rate Note, 8/25/33 1,047,894 155,172 2.43 A+/Ba3 WaMu Mortgage Pass Through Certificates, Floating Rate Note, 8/25/34 151,693 183,657 2.45 B-/NR WaMu Mortgage Pass Through Certificates, Floating Rate Note, 8/25/35 176,320 4,273,059 2.44 BBB+/NR WaMu Mortgage Pass-Through Certificates, Floating Rate Note, 1/25/35 4,281,238 1,927,000 NR/Aaa Wells Fargo Commercial Mortgage Trust 2012-LC5, 3.539%, 10/15/45 1,846,870 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/13 37 Schedule of Investments | 6/30/13 (continued) --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 3,232,574 NR/Aaa Wells Fargo Commercial Mortgage Trust, 3.349%, 11/15/43 (144A) $ 3,374,066 717,669 2.51 NR/WR Wells Fargo Mortgage Backed Securities 2003-B Trust, Floating Rate Note, 2/25/33 718,493 817,659 4.55 AA+/Aa2 Wells Fargo Mortgage Backed Securities 2003-L Trust, Floating Rate Note, 11/25/33 805,016 364,276 4.51 A+/Baa1 Wells Fargo Mortgage Backed Securities 2003-L Trust, Floating Rate Note, 11/25/33 352,009 483,022 2.65 AA+/A2 Wells Fargo Mortgage Backed Securities 2004-V Trust, Floating Rate Note, 10/25/34 485,799 461,837 AA+/A1 Wells Fargo Mortgage Backed Securities 2006-16 Trust, 5.0%, 11/25/36 477,037 1,867,952 4.94 BBB+/Ba3 Wells Fargo Mortgage Backed Securities Trust, Floating Rate Note, 8/25/34 1,895,688 350,000 5.39 NR/A2 WFRBS Commercial Mortgage Trust 2011-C2, Floating Rate Note, 2/15/44 (144A) 364,437 ------------------- $ 231,686,827 ------------------- Total Banks $ 231,686,827 --------------------------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 2.9% Other Diversified Financial Services -- 2.6% 1,265,179 2.89 AA+/NR Banc of America Mortgage 2003-F Trust, Floating Rate Note, 7/25/33 $ 1,243,250 1,031,122 3.16 NR/Ba2 Banc of America Mortgage 2003-I Trust, Floating Rate Note, 10/25/33 1,021,573 317,902 2.70 AA+/NR Banc of America Mortgage 2004-E Trust, Floating Rate Note, 6/25/34 314,803 689,012 5.07 BBB+/NR Banc of America Mortgage 2005-H Trust, Floating Rate Note, 9/25/35 677,553 1,572,914 A+/NR Banc of America Mortgage Trust 2004-11, 5.75%, 1/25/35 1,611,872 156,042 BB+/NR Banc of America Mortgage Trust 2004-7, 4.5%, 8/25/19 158,497 1,350,740 A+/NR Banc of America Mortgage Trust 2004-9, 5.5%, 11/25/34 1,407,821 550,447 NR/B1 Citicorp Mortgage Securities Trust Series 2006-1, 5.0%, 2/25/36 566,339 772,409 0.31 AA/Aaa Commercial Mortgage Pass-Through Certificates Series 2007-TFL1, Floating Rate Note, 2/15/22 (144A) 765,431 The accompanying notes are an integral part of these financial statements. 38 Pioneer Bond Fund | Annual Report | 6/30/13 --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- Other Diversified Financial Services -- (continued) 1,900,000 5.58 NR/Aa2 DBUBS 2011-LC3 Mortgage Trust, Floating Rate Note, 8/10/44 (144A) $ 2,042,200 1,895,000 1.49 AA-/NR Del Coronado Trust 2013-DEL, Floating Rate Note, 3/15/26 (144A) 1,886,937 1,684,154 0.44 AA/Aa3 GE Business Loan Trust 2005-1, Floating Rate Note, 6/15/33 (144A) 1,584,453 1,435,313 0.39 BB+/Baa2 Impac Secured Assets Trust 2006-5, Floating Rate Note, 12/25/36 1,231,613 1,454,655 B+/Baa3 JP Morgan Mortgage Trust 2004-S1, 5.0%, 9/25/34 1,500,256 2,224,245 B-/Ba2 JP Morgan Mortgage Trust 2004-S1, 6.0%, 9/25/34 2,283,508 603,610 3.00 NR/NR La Hipotecaria Panamanian Mortgage Trust 2010-1, Floating Rate Note, 9/8/39 (144A) 627,000 1,395,000 5.52 NR/A2 LSTAR Commercial Mortgage Trust, Floating Rate Note, 10/25/19 (144A) 1,476,707 975,373 2.54 A+/NR Merrill Lynch Mortgage Investors Trust Series MLMI 2005-A2, Floating Rate Note, 2/25/35 975,374 2,550,560 AAA/NR Morgan Stanley Capital I Trust 2004-HQ4, 4.97%, 4/14/40 2,621,226 1,000,000 BBB-/NR Morgan Stanley Capital I Trust 2007-HQ13, 5.569%, 12/15/44 1,083,629 678,438 0.29 AA+/Aaa Morgan Stanley Capital I, Inc., Floating Rate Note, 10/15/20 (144A) 672,446 5,102,000 0.32 A+/Aa1 Morgan Stanley Capital I, Inc., Floating Rate Note, 10/15/20 (144A) 5,045,322 825,491 NR/Baa3 ORES NPL LLC, 4.0%, 9/25/44 (144A) 824,916 744,541 NR/Ba1 RALI Series 2003-QS14 Trust, 5.0%, 7/25/18 759,935 3,084,550 NR/B1 RALI Series 2004-QS13 Trust, 5.0%, 9/25/19 3,169,819 1,306,714 NR/B3 RALI Series 2004-QS16 Trust, 5.5%, 12/25/34 1,342,989 1,791,014 NR/Baa3 RALI Series 2004-QS3 Trust, 5.0%, 3/25/19 1,864,461 1,169,057 2.50 A+/Baa1 Structured Adjustable Rate Mortgage Loan Trust Class A1, Floating Rate Note, 3/25/34 1,147,040 718,680 2.50 BBB-/B3 Structured Adjustable Rate Mortgage Loan Trust, Floating Rate Note, 1/25/35 687,333 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/13 39 Schedule of Investments | 6/30/13 (continued) --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- Other Diversified Financial Services -- (continued) 639,404 5.30 BBB+/Ba2 Structured Adjustable Rate Mortgage Loan Trust, Floating Rate Note, 11/25/34 $ 630,875 392,811 NR/NR VOLT XV LLC, 3.222%, 5/27/53 (Step) (144A) 380,045 ------------------- $ 41,605,223 --------------------------------------------------------------------------------------------------------------------- Specialized Finance -- 0.0%+ 272,904 BB+/Baa2 Spirit Master Funding LLC, 5.74%, 3/20/25 (144A) $ 267,265 --------------------------------------------------------------------------------------------------------------------- Consumer Finance -- 0.1% 1,645,519 4.50 AA/Baa3 GMACM Mortgage Loan Trust 2003-AR1, Floating Rate Note, 10/19/33 $ 1,658,372 --------------------------------------------------------------------------------------------------------------------- Asset Management & Custody Banks -- 0.0%+ 506,741 2.72 NR/NR Jefferies & Co., Inc., Floating Rate Note, 5/26/37 (144A) $ 510,415 --------------------------------------------------------------------------------------------------------------------- Investment Banking & Brokerage -- 0.2% 1,440,000 4.88 AAA/NR Banc of America Merrill Lynch Commercial Mortgage, Inc., Floating Rate Note, 7/10/42 $ 1,482,568 1,156,606 7.64 BBB+/Aa3 Bear Stearns Commercial Mortgage Securities Trust 2002 Top6, Floating Rate Note, 10/15/36 (144A) 1,196,606 ------------------- $ 2,679,174 ------------------- Total Diversified Financials $ 46,720,449 --------------------------------------------------------------------------------------------------------------------- REAL ESTATE -- 1.3% Mortgage REITs -- 1.2% 339,646 B+/NR Credit Suisse First Boston Mortgage Securities Corp., 5.5%, 6/25/33 $ 338,948 651,563 2.71 BBB+/Ba1 Credit Suisse First Boston Mortgage Securities Corp., Floating Rate Note, 11/25/33 638,186 681,906 1.54 AA+/A3 Credit Suisse First Boston Mortgage Securities Corp., Floating Rate Note, 12/25/33 671,710 648,241 2.63 BBB+/B1 Credit Suisse First Boston Mortgage Securities Corp., Floating Rate Note, 6/25/34 638,801 482,457 1.69 NR/WR Credit Suisse First Boston Mortgage Securities Corp., Floating Rate Note, 8/25/33 461,380 3,250,000 6.45 D/Caa2 Credit Suisse First Boston Mortgage Securities Corp., Floating Rate Note, 9/15/34 (144A) 1,525,550 The accompanying notes are an integral part of these financial statements. 40 Pioneer Bond Fund | Annual Report | 6/30/13 --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- Mortgage REITs -- (continued) 650,000 3.49 NR/A2 FREMF Mortgage Trust Class B, Floating Rate Note, 11/25/46 (144A) $ 660,316 858,000 3.82 NR/NR FREMF Mortgage Trust Class B, Floating Rate Note, 6/25/47 (144A) 834,467 5,000,000 4.29 A-/NR FREMF Mortgage Trust Class B, Floating Rate Note, 7/25/48 (144A) 5,093,545 1,500,000 4.60 NR/NR FREMF Mortgage Trust, Floating Rate Note, 11/25/49 (144A) 1,487,889 900,000 3.31 A-/Baa2 FREMF Mortgage Trust, Floating Rate Note, 10/25/17 (144A) 838,357 850,000 5.44 NR/A3 FREMF Mortgage Trust, Floating Rate Note, 4/25/20 (144A) 896,749 1,750,000 4.77 NR/A3 FREMF Mortgage Trust, Floating Rate Note, 4/25/44 (144A) 1,815,091 1,250,000 4.89 NR/A3 FREMF Mortgage Trust, Floating Rate Note, 7/25/44 (144A) 1,299,408 600,000 5.16 A+/NR FREMF Mortgage Trust, Floating Rate Note, 9/25/43 624,342 1,250,000 4.16 NR/Baa2 FREMF Mortgage Trust, Floating Rate Note, 9/25/44 (144A) 1,170,224 890,000 5.16 NR/NR FREMF Mortgage Trust, Floating Rate Note, 9/25/45 (144A) 921,463 ------------------- $ 19,916,426 --------------------------------------------------------------------------------------------------------------------- Diversified Real Estate Activities -- 0.1% 1,067,103 0.63 B+/Baa1 Mellon Residential Funding Corp. Mortgage Pass-Through Trust Series 2000-TBC3, Floating Rate Note, 12/15/30 $ 1,020,758 ------------------- Total Real Estate $ 20,937,184 --------------------------------------------------------------------------------------------------------------------- GOVERNMENT -- 1.1% Government -- 1.1% 5,707 NR/NR Fannie Mae REMICS, 10.3%, 4/25/19 $ 6,517 1,000,000 NR/NR Fannie Mae REMICS, 4.5%, 6/25/29 1,089,400 866,277 NR/NR Fannie Mae REMICS, 5.0%, 3/25/24 881,400 2,888,181 NR/NR Fannie Mae REMICS, 5.0%, 7/25/33 2,967,485 214,666 NR/NR Fannie Mae REMICS, 5.0%, 9/25/39 218,501 1,890,864 NR/NR Freddie Mac REMICS, 5.0%, 6/15/33 1,924,703 1,038,669 NR/NR Freddie Mac REMICS, 5.0%, 6/15/34 1,070,300 1,944,150 NR/NR Government National Mortgage Association, 3.0%, 4/20/41 1,997,560 375,000 NR/NR Government National Mortgage Association, 4.973%, 4/16/42 411,528 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/13 41 Schedule of Investments | 6/30/13 (continued) --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- Government -- (continued) 678,307 NR/NR Government National Mortgage Association, 5.25%, 8/16/35 $ 767,486 49,002,111 0.56 NR/NR Government National Mortgage Association, Floating Rate Note, 11/16/51 (c) 1,766,575 11,804,641 1.03 NR/NR Government National Mortgage Association, Floating Rate Note, 2/16/53 (c) 1,007,491 8,158,112 1.05 NR/NR Government National Mortgage Association, Floating Rate Note, 3/16/53 (c) 671,462 13,742,413 1.10 NR/NR Government National Mortgage Association, Floating Rate Note, 8/16/52 (c) 1,038,253 12,761,661 1.07 NR/NR Government National Mortgage Association, Floating Rate Note, 9/16/52 (c) 1,137,779 ------------------- $ 16,956,440 ------------------- Total Government $ 16,956,440 --------------------------------------------------------------------------------------------------------------------- TOTAL COLLATERALIZED MORTGAGE OBLIGATIONS (Cost $319,517,838) $ 316,604,511 --------------------------------------------------------------------------------------------------------------------- CORPORATE BONDS -- 35.3% ENERGY -- 2.7% Oil & Gas Drilling -- 0.1% 1,025,000 BBB+/Baa1 Pride International, Inc., 6.875%, 8/15/20 $ 1,216,480 --------------------------------------------------------------------------------------------------------------------- Oil & Gas Equipment & Services -- 0.2% 125,000 BBB-/Baa2 Weatherford International, Ltd. Bermuda, 5.95%, 4/15/42 $ 118,146 2,815,000 BBB-/Baa2 Weatherford International, Ltd. Bermuda, 9.625%, 3/1/19 3,558,782 ------------------- $ 3,676,928 --------------------------------------------------------------------------------------------------------------------- Oil & Gas Exploration & Production -- 0.6% 1,800,000 B/B2 EP Energy LLC, 9.375%, 5/1/20 $ 2,034,000 901,000 BBB/Baa2 Marathon Oil Corp., 5.9%, 3/15/18 1,035,463 1,400,000 BBB-/Ba1 Newfield Exploration Co., 5.625%, 7/1/24 1,358,000 933,629 A/Aa3 Ras Laffan Liquefied Natural Gas Co., Ltd. III, 5.832%, 9/30/16 (144A) 991,980 1,000,000 BBB/Baa2 TNK-BP Finance SA, 6.625%, 3/20/17 (144A) 1,085,000 2,080,000 BBB/Baa2 TNK-BP Finance SA, 7.5%, 7/18/16 (144A) 2,306,200 The accompanying notes are an integral part of these financial statements. 42 Pioneer Bond Fund | Annual Report | 6/30/13 --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- Oil & Gas Exploration & Production -- (continued) 1,000,000 BBB/Baa2 TNK-BP Finance SA, 7.875%, 3/13/18 (144A) $ 1,137,500 ------------------- $ 9,948,143 --------------------------------------------------------------------------------------------------------------------- Oil & Gas Refining & Marketing -- 0.4% 2,475,000 BBB/Baa2 Spectra Energy Capital LLC, 6.2%, 4/15/18 $ 2,883,793 2,890,000 BBB/Baa2 Valero Energy Corp., 9.375%, 3/15/19 3,789,472 ------------------- $ 6,673,265 --------------------------------------------------------------------------------------------------------------------- Oil & Gas Storage & Transportation -- 1.4% 435,000 BBB-/Baa2 Boardwalk Pipelines LP, 5.5%, 2/1/17 $ 479,975 1,535,000 BBB-/Baa3 Buckeye Partners LP, 6.05%, 1/15/18 1,727,699 2,900,000 BBB/Baa2 DCP Midstream LLC, 9.75%, 3/15/19 (144A) 3,739,930 3,950,000 5.85 BB+/Baa3 DCP Midstream LLC, Floating Rate Note, 5/21/43 (144A) 3,792,000 1,200,000 0.00 NR/NR Energy Transfer Partners LP, Floating Rate Note, 11/1/66 1,080,000 3,250,000 BBB/Baa2 Kinder Morgan Energy Partners LP, 5.95%, 2/15/18 3,766,259 1,500,000 BBB/Baa2 Spectra Energy Capital LLC, 6.75%, 7/15/18 1,765,350 2,200,000 BBB-/Baa3 Sunoco Logistics Partners Operations LP, 6.1%, 2/15/42 2,298,718 2,475,000 BBB-/Baa3 The Williams Companies, Inc., 7.75%, 6/15/31 2,890,674 ------------------- $ 21,540,605 ------------------- Total Energy $ 43,055,421 --------------------------------------------------------------------------------------------------------------------- MATERIALS -- 1.7% Diversified Chemicals -- 0.1% 980,000 BBB/Baa2 Eastman Chemical Co., 4.8%, 9/1/42 $ 927,458 --------------------------------------------------------------------------------------------------------------------- Construction Materials -- 0.3% 3,328,000 B/NR Cemex Espana Luxembourg, 9.875%, 4/30/19 (144A) $ 3,594,240 475,000 BBB/Baa2 Holcim US Finance Sarl & Cie SCS, 6.0%, 12/30/19 (144A) 530,371 ------------------- $ 4,124,611 --------------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/13 43 Schedule of Investments | 6/30/13 (continued) --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- Aluminum -- 0.1% 2,425,000 BBB-/Ba1 Alcoa, Inc., 6.15%, 8/15/20 $ 2,483,908 --------------------------------------------------------------------------------------------------------------------- Diversified Metals & Mining -- 0.6% 900,000 BBB-/Baa2 AngloGold Ashanti Holdings Plc, 5.125%, 8/1/22 $ 795,820 3,085,000 BBB-/Baa2 AngloGold Ashanti Holdings Plc, 5.375%, 4/15/20 2,884,157 2,525,000 BBB/Baa3 Freeport-McMoRan Copper & Gold, Inc., 3.875%, 3/15/23 (144A) 2,285,357 5,000,000 BB+/Ba1 Gold Fields Orogen Holding BVI, Ltd., 4.875%, 10/7/20 (144A) 4,225,000 ------------------- $ 10,190,334 --------------------------------------------------------------------------------------------------------------------- Gold -- 0.1% 1,650,000 BBB+/Baa2 Goldcorp, Inc., 3.7%, 3/15/23 $ 1,461,118 --------------------------------------------------------------------------------------------------------------------- Steel -- 0.5% 500,000 BB+/Ba1 ArcelorMittal, 6.0%, 3/1/21 $ 497,500 3,900,000 BB+/Ba1 ArcelorMittal, 6.125%, 6/1/18 4,017,000 2,805,000 BB+/Ba2 Commercial Metals Co., 7.35%, 8/15/18 3,008,362 ------------------- $ 7,522,862 ------------------- Total Materials $ 26,710,291 --------------------------------------------------------------------------------------------------------------------- CAPITAL GOODS -- 1.9% Aerospace & Defense -- 0.1% 2,250,000 BB/Ba2 Bombardier, Inc., 4.25%, 1/15/16 (144A) $ 2,300,625 --------------------------------------------------------------------------------------------------------------------- Building Products -- 0.3% 825,000 BBB-/Ba3 Masco Corp., 5.95%, 3/15/22 $ 866,250 4,260,000 BBB-/Ba3 Masco Corp., 7.125%, 3/15/20 4,749,900 ------------------- $ 5,616,150 --------------------------------------------------------------------------------------------------------------------- Industrial Conglomerates -- 0.2% 2,950,000 BBB+/Baa2 Tyco Electronics Group SA, 6.55%, 10/1/17 $ 3,414,920 --------------------------------------------------------------------------------------------------------------------- Construction & Farm Machinery & Heavy Trucks -- 0.3% 3,200,000 A/A3 Cummins, Inc., 5.65%, 3/1/98 $ 3,030,864 910,000 A/A3 Cummins, Inc., 6.75%, 2/15/27 1,054,267 ------------------- $ 4,085,131 --------------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 44 Pioneer Bond Fund | Annual Report | 6/30/13 --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- Industrial Machinery -- 0.3% 2,150,000 BBB/Baa2 Ingersoll-Rand Global Holding Co., Ltd., 9.5%, 4/15/14 $ 2,294,622 1,810,000 BBB/Baa3 Valmont Industries, Inc., 6.625%, 4/20/20 2,063,824 ------------------- $ 4,358,446 --------------------------------------------------------------------------------------------------------------------- Trading Companies & Distributors -- 0.7% 3,525,000 BB+/NR Aviation Capital Group Corp., 6.75%, 4/6/21 (144A) $ 3,712,382 5,660,000 BBB/Baa2 GATX Corp., 6.0%, 2/15/18 6,339,404 1,175,000 BBB/Baa2 Glencore Funding LLC, 4.125%, 5/30/23 (144A) 1,047,964 ------------------- $ 11,099,750 ------------------- Total Capital Goods $ 30,875,022 --------------------------------------------------------------------------------------------------------------------- TRANSPORTATION -- 0.1% Airlines -- 0.1% 135,834 BBB/Baa2 Southwest Airlines Co., 7.67%, 1/2/14 $ 138,376 1,500,000 BBB/Ba1 US Airways 2013-1 Class A Pass Through Trust, 3.95%, 11/15/25 1,443,750 ------------------- $ 1,582,126 --------------------------------------------------------------------------------------------------------------------- Trucking -- 0.0%+ 529,000 BBB-/Baa2 Asciano Finance, Ltd., 4.625%, 9/23/20 (144A) $ 533,063 ------------------- Total Transportation $ 2,115,189 --------------------------------------------------------------------------------------------------------------------- AUTOMOBILES & COMPONENTS -- 0.0%+ Automobile Manufacturers -- 0.0%+ 655,000 BBB+/Baa1 Hyundai Motor Manufacturing Czech s.r.o., 4.5%, 4/15/15 (144A) $ 683,387 ------------------- Total Automobiles & Components $ 683,387 --------------------------------------------------------------------------------------------------------------------- CONSUMER DURABLES & APPAREL -- 0.0%+ Home Furnishings -- 0.0%+ 800,000 BBB-/Ba1 Mohawk Industries, Inc., 3.85%, 2/1/23 $ 767,751 ------------------- Total Consumer Durables & Apparel $ 767,751 --------------------------------------------------------------------------------------------------------------------- CONSUMER SERVICES -- 0.9% Education Services -- 0.9% 525,000 AA+/Aaa Amherst College, 3.794%, 11/1/42 $ 485,396 1,000,000 NR/Aa2 Bowdoin College, 4.693%, 7/1/12 863,262 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/13 45 Schedule of Investments | 6/30/13 (continued) --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- Education Services -- (continued) 1,100,000 AAA/Aaa Massachusetts Institute of Technology, 5.6%, 7/1/11 $ 1,325,870 2,600,000 AAA/NR President and Fellows of Harvard College, 2.3%, 10/1/23 2,460,754 3,095,000 AAA/Aaa President and Fellows of Harvard College, 6.3%, 10/1/37 3,479,254 1,900,000 A+/A1 The George Washington University, 1.827%, 9/15/17 1,888,209 3,550,000 AA-/Aa2 Tufts University, 5.017%, 4/15/12 3,542,698 ------------------- $ 14,045,443 ------------------- Total Consumer Services $ 14,045,443 --------------------------------------------------------------------------------------------------------------------- RETAILING -- 0.1% Internet Retail -- 0.1% 800,000 BBB-/Ba1 Expedia, Inc., 5.95%, 8/15/20 $ 849,010 ------------------- Total Retailing $ 849,010 --------------------------------------------------------------------------------------------------------------------- FOOD & STAPLES RETAILING -- 0.1% Drug Retail -- 0.1% 727,710 BBB+/Baa2 CVS Pass-Through Trust, 5.298%, 1/11/27 (144A) $ 792,810 1,463,946 BBB+/Baa2 CVS Pass-Through Trust, 5.773%, 1/10/33 (144A) 1,601,484 ------------------- $ 2,394,294 ------------------- Total Food & Staples Retailing $ 2,394,294 --------------------------------------------------------------------------------------------------------------------- FOOD, BEVERAGE & TOBACCO -- 1.0% Distillers & Vintners -- 0.1% 1,500,000 BBB-/Baa2 Beam, Inc., 3.25%, 5/15/22 $ 1,445,116 --------------------------------------------------------------------------------------------------------------------- Agricultural Products -- 0.3% 5,175,000 BBB/Baa2 Viterra, Inc., 5.95%, 8/1/20 (144A) $ 5,471,667 --------------------------------------------------------------------------------------------------------------------- Packaged Foods & Meats -- 0.5% 3,240,000 BBB/Baa2 Kraft Foods Group, Inc., 3.5%, 6/6/22 $ 3,208,501 3,725,000 BBB-/Baa2 Mondelez International, Inc., 6.5%, 2/9/40 4,444,424 ------------------- $ 7,652,925 --------------------------------------------------------------------------------------------------------------------- Tobacco -- 0.1% 1,050,000 BBB-/Baa2 Lorillard Tobacco Co., 3.75%, 5/20/23 $ 968,838 ------------------- Total Food, Beverage & Tobacco $ 15,538,546 --------------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 46 Pioneer Bond Fund | Annual Report | 6/30/13 --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- HOUSEHOLD & PERSONAL PRODUCTS -- 0.2% Personal Products -- 0.2% 3,720,000 BBB-/Baa2 Avon Products, Inc., 5.0%, 3/15/23 $ 3,697,632 ------------------- Total Household & Personal Products $ 3,697,632 --------------------------------------------------------------------------------------------------------------------- HEALTH CARE EQUIPMENT & SERVICES -- 0.3% Health Care Services -- 0.2% 2,600,000 AA-/Aa3 Catholic Health Initiatives, 4.35%, 11/1/42 $ 2,367,747 --------------------------------------------------------------------------------------------------------------------- Health Care Facilities -- 0.1% 2,400,000 A-/A3 NYU Hospitals Center, 4.428%, 7/1/42 $ 2,195,458 ------------------- Total Health Care Equipment & Services $ 4,563,205 --------------------------------------------------------------------------------------------------------------------- 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 $ 6,190,341 ------------------- Total Pharmaceuticals, Biotechnology & Life Sciences $ 6,190,341 --------------------------------------------------------------------------------------------------------------------- BANKS -- 4.3% Diversified Banks -- 2.1% 3,515,000 BBB+/Baa3 Barclays Bank Plc, 6.05%, 12/4/17 (144A) $ 3,802,246 3,815,000 NR/Baa2 BBVA Bancomer SA Texas, 6.5%, 3/10/21 (144A) 4,005,750 3,435,000 AA-/Aa2 Cooperatieve Centrale Raiffeisen-Boerenleenbank BA Netherlands, 3.875%, 2/8/22 3,459,110 625,000 A+/Aa3 Export-Import Bank of Korea, 5.875%, 1/14/15 664,919 1,855,000 A/Aa3 Industrial Bank of Korea, 7.125%, 4/23/14 (144A) 1,939,070 3,476,000 BBB+/Baa2 Intesa Sanpaolo S.p.A., 3.625%, 8/12/15 (144A) 3,483,811 1,400,000 BBB+/Baa2 Intesa Sanpaolo S.p.A., 6.5%, 2/24/21 (144A) 1,410,041 3,000,000 BBB/A3 Macquarie Bank, Ltd., 6.625%, 4/7/21 (144A) 3,174,330 4,500,000 A/Baa1 Nordea Bank AB, 4.25%, 9/21/22 (144A) 4,439,588 1,578,947 3.02 A/NR SBP DPR Finance Co., Floating Rate Note, 3/15/17 (144A) 1,573,853 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/13 47 Schedule of Investments | 6/30/13 (continued) --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- Diversified Banks -- (continued) 2,600,000 4.50 NR/Baa3 Scotiabank Peru SA, Floating Rate Note, 12/13/27 (144A) $ 2,333,500 2,200,000 A/A2 Standard Chartered Bank, 6.4%, 9/26/17 (144A) 2,474,802 1,300,000 A-/A3 Standard Chartered Plc, 3.95%, 1/11/23 (144A) 1,209,320 ------------------- $ 33,970,340 --------------------------------------------------------------------------------------------------------------------- Regional Banks -- 1.9% 1,190,000 A-/NR CoBank ACB, 7.875%, 4/16/18 (144A) $ 1,451,958 3,350,000 A/A2 HSBC Bank USA NA New York NY, 6.0%, 8/9/17 3,785,604 2,505,000 A/A1 Mellon Funding Corp., 5.5%, 11/15/18 2,886,587 1,435,000 A-/A3 PNC Bank NA, 6.0%, 12/7/17 1,659,067 4,080,000 BBB-/Baa2 Sovereign Bank, 8.75%, 5/30/18 4,933,136 1,025,000 BBB/Baa1 SunTrust Banks, Inc., 3.5%, 1/20/17 1,072,630 6,273,000 4.49 BBB/Baa3 The PNC Financial Services Group, Inc., Floating Rate Note (Perpetual) 6,238,498 1,860,000 4.85 BBB/Baa3 The PNC Financial Services Group, Inc., Floating Rate Note (Perpetual) 1,734,450 1,050,000 6.75 BBB/Baa3 The PNC Financial Services Group, Inc., Floating Rate Note (Perpetual) 1,139,250 1,450,000 BBB-/NR UBS AG, 7.625%, 8/17/22 1,591,300 3,520,000 A+/A1 Wachovia Bank NA, 6.0%, 11/15/17 4,016,721 ------------------- $ 30,509,201 --------------------------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- 0.3% 2,300,000 BBB-/Baa2 Astoria Financial Corp., 5.0%, 6/19/17 $ 2,417,075 2,000,000 BBB/Baa2 Santander Holdings USA, Inc. Pennsylvania, 3.0%, 9/24/15 2,050,664 ------------------- $ 4,467,739 ------------------- Total Banks $ 68,947,280 --------------------------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 8.2% Other Diversified Financial Services -- 3.7% 3,000,000 BBB+/Baa2 Alterra Finance LLC, 6.25%, 9/30/20 $ 3,424,944 1,100,000 BBB+/Baa3 Bank of America Corp., 7.75%, 8/15/15 1,217,279 1,250,000 5.25 BB-/NR Caelus Re, Ltd., Floating Rate Note, 3/7/16 (Cat Bond) (144A) 1,234,625 The accompanying notes are an integral part of these financial statements 48 Pioneer Bond Fund | Annual Report | 6/30/13 --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- Other Diversified Financial Services -- (continued) 1,100,000 6.85 NR/NR Caelus Re, Ltd., Floating Rate Note, 4/7/17 (Cat Bond) (144A) $ 1,093,620 1,000,000 A-/NR Carlyle Holdings Finance LLC, 3.875%, 2/1/23 (144A) 967,789 3,160,000 A-/NR Carlyle Holdings II Finance LLC, 5.625%, 3/30/43 (144A) 2,956,006 2,000,000 5.95 BB/B1 Citigroup, Inc., Floating Rate Note (Perpetual) 1,990,200 3,100,000 5.35 BB/B1 Citigroup, Inc., Floating Rate Note (Perpetual) 2,906,250 300,000 9.00 BB-/NR Compass Re, Ltd., Floating Rate Note, 1/8/15 (Cat Bond) (144A) 307,560 950,000 10.25 BB-/NR Compass Re, Ltd., Floating Rate Note, 1/8/15 (Cat Bond) (144A) 978,880 250,000 9.00 BB/NR East Lane Re V, Ltd., Floating Rate Note, 3/16/16 (Cat Bond) (144A) 268,275 250,000 7.35 BB-/NR Embarcadero Reinsurance, Ltd., Floating Rate Note, 2/13/15 (Cat Bond) (144A) 258,375 500,000 6.60 BB-/NR Embarcadero Reinsurance, Ltd., Floating Rate Note, 8/4/14 (Cat Bond) (144A) 510,900 650,000 5.00 BB+/NR Embarcadero Reinsurance, Ltd., Floating Rate Note, 8/7/15 (Cat Bond) (144A) 673,660 4,860,000 AA/A2 General Electric Capital Corp., 5.3%, 2/11/21 5,331,279 1,800,000 7.12 AA-/Baa1 General Electric Capital Corp., Floating Rate Note (Perpetual) 2,034,000 1,840,000 BBB+/Baa1 Hyundai Capital Services, Inc., 6.0%, 5/5/15 (144A) 1,975,913 900,000 0.00 BB+/NR Ibis Re II, Ltd., Floating Rate Note, 6/28/16 (Cat Bond) (144A) 899,550 2,575,000 A/A2 JPMorgan Chase & Co., 6.0%, 1/15/18 2,938,492 6,140,000 7.90 BBB/Ba1 JPMorgan Chase & Co., Floating Rate Note (Perpetual) 6,938,200 5,025,000 A-/NR KKR Group Finance Co. II LLC, 5.5%, 2/1/43 (144A) 4,590,393 2,400,000 6.00 BB/NR Lodestone Re, Ltd., Floating Rate Note, 1/8/14 (Cat Bond) (144A) 2,397,360 1,000,000 7.25 BB/NR Lodestone Re, Ltd., Floating Rate Note, 1/8/14 (Cat Bond) (144A) 1,000,200 1,200,000 4.00 BB/NR Longpoint Re, Ltd. III, Floating Rate Note, 5/18/16 (Cat Bond) (144A) 1,194,960 The accompanying notes are an integral part of these financial statements Pioneer Bond Fund | Annual Report | 6/30/13 49 Schedule of Investments | 6/30/13 (continued) --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- Other Diversified Financial Services -- (continued) 750,000 7.50 BB-/NR Queen Street II Capital, Ltd., Floating Rate Note, 4/9/14 (Cat Bond) (144A) $ 754,275 500,000 7.50 BB-/NR Queen Street IV Capital, Ltd., Floating Rate Note, 4/9/15 (Cat Bond) (144A) 507,850 650,000 9.00 BB-/NR Residential Reinsurance 2011, Ltd., Floating Rate Note, 6/6/15 (Cat Bond) (144A) 668,005 725,000 8.75 B+/NR Residential Reinsurance 2011, Ltd., Floating Rate Note, 6/6/15 (Cat Bond) (144A) 753,348 1,500,000 7.00 BB/NR Shore Re, Ltd., Floating Rate Note, 7/8/13 (Cat Bond) (144A) 1,499,700 300,000 8.50 B+/NR Tar Heel Re, Ltd., Floating Rate Note, 5/9/16 (Cat Bond) (144A) 305,820 1,250,000 7.70 BBB/NR Tiers Trust, Floating Rate Note, 10/15/97 (144A) (e) 787,549 6,500,000 2.90 BBB-/NR Vita Capital V, Ltd., Floating Rate Note, 1/15/17 (Cat Bond) (144A) 6,644,950 ------------------- $ 60,010,207 --------------------------------------------------------------------------------------------------------------------- Specialized Finance -- 0.9% 2,900,000 BBB+/Baa1 BM&FBovespa SA, 5.5%, 7/16/20 (144A) $ 2,961,625 5,205,000 BBB-/WR Cantor Fitzgerald LP, 7.875%, 10/15/19 (144A) 5,326,292 625,000 5.25 BB+/NR Kibou, Ltd., Floating Rate Note, 2/16/15 (Cat Bond) (144A) 649,875 1,475,000 BBB+/Baa2 LeasePlan Corp. NV, 2.5%, 5/16/18 (144A) 1,421,474 2,000,000 A+/A1 National Rural Utilities Cooperative Finance Corp., 5.45%, 2/1/18 2,301,066 950,000 3.50 BB+/NR Sanders Re, Ltd., Floating Rate Note, 5/5/17 (Cat Bond) (144A) 940,025 1,000,000 4.00 BB/NR Sanders Re, Ltd., Floating Rate Note, 5/5/17 (Cat Bond) (144A) 989,500 ------------------- $ 14,589,857 --------------------------------------------------------------------------------------------------------------------- Consumer Finance -- 0.6% 925,000 BB+/Ba1 Banque PSA Finance SA, 5.75%, 4/4/21 (144A) $ 875,272 1,465,000 BBB/Baa1 Capital One Bank USA NA, 8.8%, 7/15/19 1,879,142 The accompanying notes are an integral part of these financial statements. 50 Pioneer Bond Fund | Annual Report | 6/30/13 --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- Consumer Finance -- (continued) 2,575,000 A/A2 Caterpillar Financial Services Corp., 7.05%, 10/1/18 $ 3,189,902 790,000 BBB+/A3 Nissan Motor Acceptance Corp., 4.5%, 1/30/15 (144A) 832,731 3,155,000 4.00 BBB-/Ba1 SLM Corp., Floating Rate Note, 7/25/14 3,170,775 ------------------- $ 9,947,822 --------------------------------------------------------------------------------------------------------------------- Asset Management & Custody Banks -- 0.6% 1,400,000 A/NR Blackstone Holdings Finance Co. LLC, 4.75%, 2/15/23 (144A) $ 1,480,994 733,000 A-/A3 Eaton Vance Corp., 6.5%, 10/2/17 843,623 4,050,000 BBB-/Baa3 Janus Capital Group, Inc., 6.7%, 6/15/17 4,522,141 2,000,000 A/A1 The Bank of New York Mellon Corp., 4.95%, 3/15/15 2,136,950 1,250,000 4.50 BBB/Baa1 The Bank of New York Mellon Corp., Floating Rate Note (Perpetual) 1,175,000 ------------------- $ 10,158,708 --------------------------------------------------------------------------------------------------------------------- Investment Banking & Brokerage -- 2.4% 11,040,000 4.00 BB+/Ba2 Goldman Sachs Capital II, Floating Rate Note, 6/1/43 $ 8,776,800 1,000,000 BBB/Baa3 Jefferies Group LLC, 5.125%, 1/20/23 992,289 600,000 BBB/Baa3 Jefferies Group LLC, 5.125%, 4/13/18 627,001 4,125,000 BBB/Baa3 Jefferies Group LLC, 6.875%, 4/15/21 4,536,642 250,000 BBB/Baa3 Jefferies Group LLC, 8.5%, 7/15/19 301,250 2,730,000 BBB/A3 Macquarie Group, Ltd., 6.0%, 1/14/20 (144A) 2,834,777 221,000 A-/Baa2 Merrill Lynch & Co., Inc., 5.0%, 2/3/14 225,792 4,350,000 BBB+/Baa3 Merrill Lynch & Co., Inc., 7.75%, 5/14/38 4,975,895 5,100,000 BBB+/Baa2 Morgan Stanley, 4.1%, 5/22/23 4,711,987 300,000 BBB+/Baa2 Morgan Stanley, 4.875%, 11/1/22 296,370 3,125,000 A-/Baa1 Morgan Stanley, 5.5%, 1/26/20 3,354,334 4,750,000 NR/Baa3 Scottrade Financial Services, Inc., 6.125%, 7/11/21 (144A) 4,646,203 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/13 51 Schedule of Investments | 6/30/13 (continued) --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- Investment Banking & Brokerage -- (continued) 2,000,000 A-/A3 The Goldman Sachs Group, Inc., 5.5%, 11/15/14 $ 2,113,606 ------------------- $ 38,392,946 ------------------- Total Diversified Financials $ 133,099,540 --------------------------------------------------------------------------------------------------------------------- INSURANCE -- 6.8% Life & Health Insurance -- 2.1% 1,850,000 BBB/WR Delphi Financial Group, Inc., 7.875%, 1/31/20 $ 2,169,900 1,690,000 A-/Baa1 Lincoln National Corp., 8.75%, 7/1/19 2,166,805 3,380,000 6.05 BBB/Baa3 Lincoln National Corp., Floating Rate Note, 4/20/67 3,311,318 4,200,000 BBB/Baa2 MetLife, Inc., 10.75%, 8/1/39 6,489,000 4,250,000 A-/Baa2 Protective Life Corp., 7.375%, 10/15/19 5,149,317 1,090,000 A/Baa2 Prudential Financial, Inc., 4.5%, 11/16/21 1,148,358 2,140,000 8.88 BBB+/Baa3 Prudential Financial, Inc., Floating Rate Note, 6/15/38 2,568,000 1,500,000 5.62 BBB+/Baa3 Prudential Financial, Inc., Floating Rate Note, 6/15/43 1,470,000 1,800,000 5.88 BBB+/Baa3 Prudential Financial, Inc., Floating Rate Note, 9/15/42 1,804,500 3,205,000 AA-/Aa2 Teachers Insurance & Annuity Association of America, 6.85%, 12/16/39 (144A) 3,914,084 1,080,000 BBB/Baa2 Unum Group, 5.75%, 8/15/42 1,145,464 500,000 2.75 BBB+/NR Vitality Re IV, Ltd., Floating Rate Note, 1/9/16 (Cat Bond) (144A) 505,900 1,400,000 5.88 NR/NR Wilton Re Finance LLC, Floating Rate Note, 3/30/33 (144A) 1,358,986 ------------------- $ 33,201,632 --------------------------------------------------------------------------------------------------------------------- Multi-line Insurance -- 1.2% 3,900,000 BBB/Baa2 Assurant, Inc., 4.0%, 3/15/23 $ 3,775,282 2,335,000 BBB/A3 AXA SA, 8.6%, 12/15/30 2,825,350 1,800,000 6.46 BBB-/Baa1 AXA SA, Floating Rate Note (Perpetual) (144A) 1,761,750 3,960,000 BBB-/Baa3 Genworth Holdings, Inc., 7.2%, 2/15/21 4,446,237 3,035,000 BBB-/Baa2 Liberty Mutual Group, Inc., 7.3%, 6/15/14 (144A) 3,187,761 2,650,000 A+/A2 Loews Corp., 5.25%, 3/15/16 2,905,696 ------------------- $ 18,902,076 --------------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 52 Pioneer Bond Fund | Annual Report | 6/30/13 --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- Property & Casualty Insurance -- 1.9% 500,000 4.37 BB+/NR Blue Danube II, Ltd., Floating Rate Note, 5/23/16 (Cat Bond) (144A) $ 497,200 1,200,000 BBB-/Baa3 Fidelity National Financial, Inc., 5.5%, 9/1/22 1,271,794 1,350,000 NR/Baa3 First American Financial Corp., 4.3%, 2/1/23 1,298,788 1,000,000 BBB-/Baa2 OneBeacon US Holdings, Inc., 4.6%, 11/9/22 994,822 3,800,000 6.80 BBB/Baa3 QBE Capital Funding II LP, Floating Rate Note (Perpetual) (144A) 3,763,516 1,100,000 A-/Baa1 QBE Insurance Group, Ltd., 2.4%, 5/1/18 (144A) 1,078,377 5,455,000 6.50 BBB/Baa1 The Allstate Corp., Floating Rate Note, 5/15/57 5,891,400 700,000 BBB-/Baa3 The Hanover Insurance Group, Inc., 7.5%, 3/1/20 804,528 1,952,000 BBB-/Baa3 The Hanover Insurance Group, Inc., 7.625%, 10/15/25 2,420,261 2,000,000 A/A2 The Travelers Companies, Inc., 6.25%, 6/15/37 2,414,300 3,600,000 BBB/Baa3 White Mountains Re Group, 6.375%, 3/20/17 (144A) 3,935,938 2,110,000 7.51 BB+/Ba2 White Mountains Re Group, Floating Rate Note (Perpetual) (144A) 2,176,904 5,005,000 6.50 BBB-/Ba1 XL Group Plc, Floating Rate Note (Perpetual) 4,879,875 ------------------- $ 31,427,703 --------------------------------------------------------------------------------------------------------------------- Reinsurance -- 1.5% 1,800,000 6.38 NR/NR Aquarius + Investments Plc for Swiss Reinsurance Co., Ltd., Floating Rate Note, 9/1/24 $ 1,794,600 250,000 8.15 BB-/NR Atlas Reinsurance VII, Ltd., Floating Rate Note, 1/7/16 (Cat Bond) (144A) 252,650 250,000 6.12 BB+/NR Blue Danube, Ltd., Floating Rate Note, 4/10/15 (Cat Bond) (144A) 258,775 350,000 2.50 BB+/NR Bosphorus 1 Re, Ltd., Floating Rate Note, 5/3/16 (Cat Bond) (144A) 348,145 1,000,000 4.50 NR/Baa1 Combine Re, Ltd., Floating Rate Note, 1/7/15 (Cat Bond) (144A) 1,031,000 1,050,000 5.00 BB+/NR Foundation Re III, Ltd., Floating Rate Note, 2/25/15 (Cat Bond) 1,073,730 1,100,000 5.75 BB/NR Foundation Re III, Ltd., Floating Rate Note, 2/3/14 (Cat Bond) (144A) 1,096,810 600,000 6.00 BB+/NR Longpoint Re, Ltd., Floating Rate Note, 6/12/15 (Cat Bond) (144A) 624,660 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/13 53 Schedule of Investments | 6/30/13 (continued) --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- Reinsurance -- (continued) 2,650,000 BBB/NR Montpelier Re Holdings, Ltd., 4.7%, 10/15/22 $ 2,605,188 650,000 9.00 BB/NR Mystic Re, Ltd., Floating Rate Note, 3/12/15 (Cat Bond) (144A) 677,040 500,000 8.71 B+/NR Mythen Re, Ltd. Series 2012-2 Class A, Floating Rate Note, 1/5/17 (Cat Bond) (144A) 511,450 250,000 8.61 NR/Ba3 Mythen, Ltd., Floating Rate Note, 5/7/15 (Cat Bond) (144A) 263,900 500,000 8.11 NR/Ba3 Mythen, Ltd., Floating Rate Note, 5/7/15 (Cat Bond) (144A) 535,500 5,048,000 BBB/NR Platinum Underwriters Finance, Inc., 7.5%, 6/1/17 5,640,373 250,000 10.35 B/NR Queen Street VI Re, Ltd., Floating Rate Note, 4/9/15 (Cat Bond) (144A) 259,525 400,000 8.60 B/NR Queen Street VII Re, Ltd., Floating Rate Note, 4/8/16 (Cat Bond) (144A) 405,880 1,450,000 6.75 BBB-/Baa3 Reinsurance Group of America, Inc., Floating Rate Note, 12/15/65 1,451,812 2,800,000 4.50 BB+/NR Residential Reinsurance 2012, Ltd., Floating Rate Note, 12/6/16 (Cat Bond) (144A) 2,834,160 275,000 10.00 BB-/NR Residential Reinsurance 2012, Ltd., Floating Rate Note, 6/6/16 (Cat Bond) (144A) 296,175 800,000 8.00 BB/NR Residential Reinsurance 2012, Ltd., Floating Rate Note, 6/6/16 (Cat Bond) (144A) 875,360 250,000 0.00 B-/NR Residential Reinsurance 2013, Ltd., Floating Rate Note, 6/6/17 (Cat Bond) (144A) 247,625 1,400,000 9.41 B/NR Successor X, Ltd. Class IV-E3, Floating Rate Note, 2/25/14 (Cat Bond) (144A) 1,403,080 250,000 11.25 B-/NR Successor X, Ltd., Floating Rate Note, 11/10/15 (Cat Bond) (144A) 253,425 ------------------- $ 24,740,863 ------------------- Total Insurance $ 108,272,274 --------------------------------------------------------------------------------------------------------------------- REAL ESTATE -- 2.8% Diversified REITs -- 0.4% 725,000 BBB/Baa2 Digital Realty Trust LP, 5.875%, 2/1/20 $ 791,083 The accompanying notes are an integral part of these financial statements. 54 Pioneer Bond Fund | Annual Report | 6/30/13 --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- Diversified REITs -- (continued) 1,050,000 BBB/Baa2 Goodman Funding Pty, Ltd., 6.0%, 3/22/22 (144A) $ 1,156,251 3,455,000 BBB/Baa2 Goodman Funding Pty, Ltd., 6.375%, 4/15/21 (144A) 3,869,337 ------------------- $ 5,816,671 --------------------------------------------------------------------------------------------------------------------- Office REITs -- 0.7% 1,093,000 BBB-/Baa2 Alexandria Real Estate Equities, Inc., 3.9%, 6/15/23 $ 1,043,509 2,670,000 BBB-/Baa2 Alexandria Real Estate Equities, Inc., 4.6%, 4/1/22 2,721,072 900,000 BBB-/Baa3 BioMed Realty LP, 4.25%, 7/15/22 884,863 1,500,000 BBB-/Baa3 Corporate Office Properties LP, 3.6%, 5/15/23 (144A) 1,384,467 2,100,000 BBB-/Baa2 Highwoods Realty LP, 3.625%, 1/15/23 1,954,422 1,200,000 BBB/Baa2 Mack-Cali Realty LP, 4.5%, 4/18/22 1,205,932 2,550,000 BBB/Baa2 Piedmont Operating Partnership LP, 3.4%, 6/1/23 (144A) 2,322,124 ------------------- $ 11,516,389 --------------------------------------------------------------------------------------------------------------------- Retail REITs -- 0.2% 575,000 BBB-/Baa3 DDR Corp., 4.625%, 7/15/22 $ 581,089 2,905,000 BBB-/Baa3 DDR Corp., 7.5%, 4/1/17 3,368,722 ------------------- $ 3,949,811 --------------------------------------------------------------------------------------------------------------------- Specialized REITs -- 1.2% 730,000 BBB-/Baa3 CubeSmart LP, 4.8%, 7/15/22 $ 757,666 4,125,000 BBB/Baa2 Health Care Real Estate Investment Trust, Inc., 6.2%, 6/1/16 4,631,896 2,425,000 BBB-/Baa3 Healthcare Realty Trust, Inc., 6.5%, 1/17/17 2,711,150 1,985,000 BBB-/Baa2 Hospitality Properties Trust, 5.0%, 8/15/22 1,980,832 4,175,000 BBB-/Baa2 Hospitality Properties Trust, 7.875%, 8/15/14 4,341,048 4,285,000 BBB-/Baa3 Senior Housing Properties Trust, 6.75%, 4/15/20 4,714,156 ------------------- $ 19,136,748 --------------------------------------------------------------------------------------------------------------------- Diversified Real Estate Activities -- 0.3% 4,125,000 A-/A2 WEA Finance LLC, 7.125%, 4/15/18 (144A) $ 4,895,373 ------------------- Total Real Estate $ 45,314,992 --------------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/13 55 Schedule of Investments | 6/30/13 (continued) --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- SOFTWARE & SERVICES -- 0.0%+ Data Processing & Outsourced Services -- 0.0%+ 447,000 B-/Caa1 First Data Corp., 8.25%, 1/15/21 (144A) $ 455,940 ------------------- Total Software & Services $ 455,940 --------------------------------------------------------------------------------------------------------------------- TECHNOLOGY HARDWARE & EQUIPMENT -- 0.1% Computer Hardware -- 0.1% 2,100,000 BB/Ba3 NCR Corp., 4.625%, 2/15/21 $ 2,005,500 ------------------- Total Technology Hardware & Equipment $ 2,005,500 --------------------------------------------------------------------------------------------------------------------- SEMICONDUCTORS & SEMICONDUCTOR EQUIPMENT -- 0.2% Semiconductor Equipment -- 0.2% 3,100,000 BBB/Baa1 KLA-Tencor Corp., 6.9%, 5/1/18 $ 3,608,744 ------------------- Total Semiconductors & Semiconductor Equipment $ 3,608,744 --------------------------------------------------------------------------------------------------------------------- TELECOMMUNICATION SERVICES -- 1.3% Integrated Telecommunication Services -- 1.0% 1,955,000 B/B1 Cincinnati Bell, Inc., 8.25%, 10/15/17 $ 2,038,088 469,000 B/B1 Cincinnati Bell, Inc., 8.375%, 10/15/20 481,898 3,355,000 NR/A2 GTP Acquisition Partners I LLC, 4.347%, 6/15/16 (144A) 3,526,343 797,365 NR/NR GTP Cellular Sites LLC, 3.721%, 3/15/17 (144A) 813,968 3,950,000 NR/A2 GTP Towers Issuer LLC, 4.436%, 2/15/15 (144A) 4,102,857 2,750,000 BBB/Baa2 Telefonica Emisiones SAU, 6.221%, 7/3/17 2,998,889 1,500,000 NR/NR Unison Ground Lease Funding LLC, 2.981%, 3/15/20 (144A) 1,433,152 ------------------- $ 15,395,195 --------------------------------------------------------------------------------------------------------------------- Wireless Telecommunication Services -- 0.3% 3,015,000 NR/A2 Crown Castle Towers LLC, 4.883%, 8/15/20 (144A) $ 3,242,129 1,625,000 NR/A2 Crown Castle Towers LLC, 6.113%, 1/15/20 (144A) 1,864,647 ------------------- $ 5,106,776 ------------------- Total Telecommunication Services $ 20,501,971 --------------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 56 Pioneer Bond Fund | Annual Report | 6/30/13 --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- UTILITIES -- 2.3% Electric Utilities -- 1.3% 980,000 A-/A3 Commonwealth Edison Co., 6.15%, 9/15/17 $ 1,142,476 656,493 BBB-/Baa3 Crockett Cogeneration LP, 5.869%, 3/30/25 (144A) 705,220 5,400,000 5.25 BBB+/A3 Electricite de France SA, Floating Rate Note (Perpetual) (144A) 5,162,400 3,365,000 BBB+/Baa2 Enel Finance International NV, 5.125%, 10/7/19 (144A) 3,494,660 848,166 BB/Baa3 FPL Energy American Wind LLC, 6.639%, 6/20/23 (144A) 786,319 155,715 B/Ba2 FPL Energy Wind Funding LLC, 6.876%, 6/27/17 (144A) 130,801 1,925,000 BB+/Baa3 Israel Electric Corp, Ltd., 7.25%, 1/15/19 (144A) 2,050,125 610,000 BB+/Baa3 Israel Electric Corp, Ltd., 9.375%, 1/28/20 (144A) 719,800 910,000 BBB+/A3 Nevada Power Co., 6.5%, 8/1/18 1,091,550 802,596 NR/WR Orcal Geothermal, Inc., 6.21%, 12/30/20 (144A) 786,544 2,690,000 BBB/Baa3 Public Service Co. of New Mexico, 7.95%, 5/15/18 3,232,872 2,200,000 6.25 BBB-/Baa2 Southern California Edison Co., Floating Rate Note (Perpetual) 2,310,000 ------------------- $ 21,612,767 --------------------------------------------------------------------------------------------------------------------- Gas Utilities -- 0.2% 2,324,545 A+/A1 Nakilat, Inc., 6.267%, 12/31/33 (144A) $ 2,440,772 --------------------------------------------------------------------------------------------------------------------- Multi-Utilities -- 0.4% 5,055,000 BBB+/Baa1 New York State Electric & Gas Corp., 6.15%, 12/15/17 (144A) $ 5,666,028 336,944 NR/NR Ormat Funding Corp., 8.25%, 12/30/20 303,250 ------------------- $ 5,969,278 --------------------------------------------------------------------------------------------------------------------- Independent Power Producers & Energy Traders -- 0.4% 622,768 BBB-/NR Alta Wind Holdings LLC, 7.0%, 6/30/35 (144A) $ 653,382 850,000 6.65 BB/NR East Lane Re, Ltd., Floating Rate Note, 3/13/15 (Cat Bond) (144A) 878,135 2,105,000 BBB-/Baa3 Kiowa Power Partners LLC, 5.737%, 3/30/21 (144A) 2,207,194 1,016,000 BB+/Ba1 NSG Holdings LLC, 7.75%, 12/15/25 (144A) 1,051,560 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/13 57 Schedule of Investments | 6/30/13 (continued) --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- Independent Power Producers & Energy Traders -- (continued) 2,378,848 BBB-/Baa3 Panoche Energy Center LLC, 6.885%, 7/31/29 (144A) $ 2,341,434 ------------------- $ 7,131,705 ------------------- Total Utilities $ 37,154,522 --------------------------------------------------------------------------------------------------------------------- TOTAL CORPORATE BONDS (Cost $534,117,208) $ 570,846,295 --------------------------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- 19.4% 33,571,912 AAA/Aaa Federal National Mortgage Association, 3.0%, 8/1/42-12/1/42 $ 32,850,454 2,355,339 AAA/Aaa Federal National Mortgage Association, 3.5%, 11/1/42-12/1/42 2,397,214 16,850,119 AAA/Aaa Federal National Mortgage Association, 4.0%, 7/1/18-2/1/43 17,581,570 30,723,561 AAA/Aaa Federal National Mortgage Association, 4.5%, 11/1/20-1/1/42 32,558,926 15,341,758 AAA/Aaa Federal National Mortgage Association, 5.0%, 12/1/17-8/1/40 16,641,685 5,990,183 AAA/Aaa Federal National Mortgage Association, 5.5%, 9/1/17-6/1/36 6,489,871 5,912,655 AAA/Aaa Federal National Mortgage Association, 6.0%, 6/1/16-7/1/38 6,511,595 1,222,805 AAA/Aaa Federal National Mortgage Association, 6.5%, 1/1/15-11/1/37 1,382,250 131,535 AAA/Aaa Federal National Mortgage Association, 7.0%, 7/1/21-1/1/32 152,101 3,343 AAA/Aaa Federal National Mortgage Association, 7.5%, 8/1/20-4/1/30 3,601 19,895 AAA/Aaa Federal National Mortgage Association, 8.0%, 4/1/20-5/1/31 23,142 1,172,766 AAA/Aaa Federal Home Loan Mortgage Corp., 4.5%, 3/1/20-10/1/20 1,235,492 4,953,936 AAA/Aaa Federal Home Loan Mortgage Corp., 5.0%, 10/1/20-10/1/38 5,304,109 2,112,937 AAA/Aaa Federal Home Loan Mortgage Corp., 5.5%, 12/1/18-11/1/35 2,284,917 5,089,283 AAA/Aaa Federal Home Loan Mortgage Corp., 6.0%, 5/1/17-12/1/36 5,601,476 453,482 AAA/Aaa Federal Home Loan Mortgage Corp., 6.5%, 11/1/30-4/1/34 506,029 494,992 AAA/Aaa Federal Home Loan Mortgage Corp., 7.0%, 8/1/22-11/1/30 536,804 7,211,374 AAA/Aaa Government National Mortgage Association I, 4.5%, 7/15/33-8/15/41 7,680,271 The accompanying notes are an integral part of these financial statements. 58 Pioneer Bond Fund | Annual Report | 6/30/13 --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- U.S. Government and Agency Obligations -- (continued) 1,835,612 AAA/Aaa Government National Mortgage Association I, 5.0%, 10/15/18-4/15/35 $ 2,004,664 7,892,193 AAA/Aaa Government National Mortgage Association I, 5.5%, 10/15/17-2/15/37 8,602,889 8,366,023 AAA/Aaa Government National Mortgage Association I, 6.0%, 8/15/13-10/15/36 9,341,356 4,179,092 AAA/Aaa Government National Mortgage Association I, 6.5%, 1/15/29-7/15/35 4,768,180 728,109 AAA/Aaa Government National Mortgage Association I, 7.0%, 12/15/13-5/15/32 849,134 142,301 AAA/Aaa Government National Mortgage Association I, 7.5%, 2/15/26-12/15/31 159,813 5,181 AAA/Aaa Government National Mortgage Association I, 7.75%, 2/15/30 5,688 4,600,392 AAA/Aaa Government National Mortgage Association II, 4.5%, 12/20/34-9/20/41 4,956,055 1,672,526 AAA/Aaa Government National Mortgage Association II, 5.5%, 10/20/19-4/20/34 1,804,710 56,584 AAA/Aaa Government National Mortgage Association II, 6.5%, 2/20/29-4/20/29 64,497 260,321 AAA/Aaa Government National Mortgage Association II, 7.0%, 11/20/28-12/20/30 302,914 1,200,000 NR/NR U.S. Treasury Bonds, 3.125%, 2/15/43 1,120,126 7,620,000 AA+/Aaa U.S. Treasury Bonds, 4.25%, 5/15/39 8,760,623 1,365,000 AA+/Aaa U.S. Treasury Bonds, 4.375%, 11/15/39 1,600,037 5,450,000 AA+/Aaa U.S. Treasury Bonds, 4.375%, 2/15/38 6,381,612 2,000,000 AA+/Aaa U.S. Treasury Bonds, 4.375%, 5/15/40 2,345,624 8,440,000 AA+/Aaa U.S. Treasury Bonds, 4.5%, 2/15/36 10,050,192 8,435,000 AA+/Aaa U.S. Treasury Bonds, 4.5%, 5/15/38 10,064,009 9,068,000 AA+/Aaa U.S. Treasury Bonds, 4.5%, 8/15/39 10,841,928 4,000,000 AA+/Aaa U.S. Treasury Bonds, 4.625%, 2/15/40 4,874,376 5,100,000 AA+/Aaa U.S. Treasury Bonds, 5.25%, 11/15/28 6,483,375 4,000,000 AA+/Aaa U.S. Treasury Bonds, 5.375%, 2/15/31 5,210,624 840,000 AA+/Aaa U.S. Treasury Bonds, 5.5%, 8/15/28 1,093,050 4,750,000 AA+/Aaa U.S. Treasury Bonds, 6.25%, 8/15/23 6,373,906 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/13 59 Schedule of Investments | 6/30/13 (continued) --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- U.S. Government and Agency Obligations -- (continued) 450,000 AA+/Aaa U.S. Treasury Bonds, 7.875%, 2/15/21 $ 637,735 8,700,000 NR/NR U.S. Treasury Notes, 0.25%, 2/28/15 8,693,545 10,000,000 AA+/Aaa U.S. Treasury Notes, 0.25%, 9/15/15 9,959,380 5,000,000 AA+/Aaa U.S. Treasury Notes, 0.625%, 8/31/17 4,897,265 7,100,000 NR/NR U.S. Treasury Notes, 0.75%, 2/28/18 6,926,384 5,000,000 AA+/Aaa U.S. Treasury Notes, 1.625%, 8/15/22 4,691,015 3,400,000 NR/NR U.S. Treasury Notes, 2.0%, 2/15/23 3,272,235 8,000,000 AA+/Aaa U.S. Treasury Notes, 2.125%, 8/15/21 7,967,504 2,700,000 AA+/Aaa U.S. Treasury Notes, 2.625%, 11/15/20 2,813,273 8,750,000 AA+/Aaa U.S. Treasury Notes, 2.75%, 2/15/19 9,313,281 6,380,000 AA+/Aaa U.S. Treasury Notes, 3.125%, 5/15/19 6,923,793 --------------------------------------------------------------------------------------------------------------------- TOTAL U.S. GOVERNMENT AND AGENCY OBLIGATIONS (Cost $300,716,747) $ 313,896,299 --------------------------------------------------------------------------------------------------------------------- MUNICIPAL BONDS -- 6.9% Municipal Airport -- 0.1% 1,000,000 BBB/Baa1 Indianapolis Airport Authority, 5.1%, 1/15/17 $ 1,108,950 --------------------------------------------------------------------------------------------------------------------- Municipal Development -- 0.7% 2,925,000 AA-/Aa3 California Statewide Communities Development Authority, 6.0%, 8/15/42 $ 3,354,244 2,350,000 BBB-/Baa3 Louisiana Local Government Environmental Facilities & Community Development Authority, 6.5%, 11/1/35 2,549,186 2,560,000 BBB/Baa2 Parish of St. John the Baptist Louisiana, 5.125%, 6/1/37 2,566,374 2,310,000 BBB/Baa3 Selma Industrial Development Board, 5.8%, 5/1/34 2,492,051 ------------------- $ 10,961,855 --------------------------------------------------------------------------------------------------------------------- Municipal General -- 1.1% 4,075,000 AA/A2 JobsOhio Beverage System, 3.985%, 1/1/29 $ 3,837,672 1,035,000 AA/A2 JobsOhio Beverage System, 4.532%, 1/1/35 978,758 4,500,000 AA-/A1 New Jersey Economic Development Authority, 0.0%, 2/15/18 (d) 3,927,825 2,750,000 A+/A1 New Jersey Transportation Trust Fund Authority, 5.5%, 6/15/41 2,962,822 The accompanying notes are an integral part of these financial statements. 60 Pioneer Bond Fund | Annual Report | 6/30/13 --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- Municipal General -- (continued) 2,400,000 AAA/Aa1 New York City Transitional Finance Authority Future Tax Secured Revenue, 5.0%, 11/1/33 $ 2,562,264 1,050,000 BBB/A3 Texas Municipal Gas Acquisition & Supply Corp III, 5.0%, 12/15/30 1,049,979 2,100,000 BBB/A3 Texas Municipal Gas Acquisition & Supply Corp III, 5.0%, 12/15/31 2,087,442 ------------------- $ 17,406,762 --------------------------------------------------------------------------------------------------------------------- Municipal Higher Education -- 2.9% 1,025,000 A+/NR Baylor University, 4.313%, 3/1/42 $ 945,388 1,980,000 AAA/Aaa California Educational Facilities Authority, 5.0%, 6/1/43 2,315,927 3,000,000 AAA/Aaa Connecticut State Health & Educational Facility Authority, 5.0%, 7/1/40 3,242,970 4,600,000 AAA/Aaa Connecticut State Health & Educational Facility Authority, 5.0%, 7/1/42 4,862,522 2,300,000 AAA/Aaa Houston Higher Education Finance Corp., 4.5%, 11/15/37 2,367,137 1,500,000 AAA/Aaa Houston Higher Education Finance Corp., 5.0%, 5/15/40 1,606,140 1,100,000 AA/Aa1 Illinois Finance Authority, 5.0%, 10/1/51 1,134,452 1,200,000 AAA/Aaa Massachusetts Development Finance Agency, 5.0%, 10/15/40 1,303,632 6,500,000 AAA/Aaa Massachusetts Health & Educational Facilities Authority, 5.5%, 11/15/36 7,296,510 1,425,000 AAA/Aaa Massachusetts Health & Educational Facilities Authority, 5.5%, 7/1/32 1,768,454 1,000,000 AAA/Aaa Massachusetts Health & Educational Facilities Authority, 6.0%, 7/1/36 1,152,110 2,850,000 AAA/Aaa Missouri State Health & Educational Facilities Authority, 5.0%, 11/15/39 3,064,035 1,600,000 AA/Aa1 New York State Dormitory Authority Series A, 5.0%, 7/1/40 1,716,144 2,590,000 AAA/Aaa New York State Dormitory Authority, 5.0%, 10/1/41 2,777,205 2,150,000 AA/Aa1 New York State Dormitory Authority, 5.0%, 7/1/35 2,322,538 875,000 AA-/Aa3 New York State Dormitory Authority, 5.0%, 7/1/37 937,221 3,700,000 AAA/Aaa New York State Dormitory Authority, 5.0%, 7/1/38 3,952,895 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/13 61 Schedule of Investments | 6/30/13 (continued) --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- Municipal Higher Education -- (continued) 800,000 AAA/Aaa Permanent University Fund, 5.0%, 7/1/30 $ 891,872 2,600,000 AA/Aa1 University of California, 3.38%, 5/15/28 2,420,470 525,000 AAA/Aaa University of Texas System, 5.0%, 8/15/43 564,386 ------------------- $ 46,642,008 --------------------------------------------------------------------------------------------------------------------- Municipal Medical -- 0.2% 325,000 AA-/A1 Massachusetts Development Finance Agency, 5.25%, 4/1/37 $ 342,969 550,000 AA-/A1 Massachusetts Development Finance Agency, 5.375%, 4/1/41 580,816 1,765,000 AA-/Aa2 Ohio Higher Educational Facility Commission, 5.0%, 1/1/42 1,797,088 ------------------- $ 2,720,873 --------------------------------------------------------------------------------------------------------------------- Municipal Pollution -- 0.4% 995,000 A-/Baa1 County of Sweetwater Wyoming, 5.6%, 12/1/35 $ 1,055,406 980,000 BBB/Baa3 Courtland Industrial Development Board, 5.0%, 8/1/27 979,980 3,965,000 5.95 BBB/NR Port Freeport Texas, Floating Rate Note, 5/15/33 4,277,997 ------------------- $ 6,313,383 --------------------------------------------------------------------------------------------------------------------- Municipal Power -- 0.2% 4,060,000 AA-/Aa3 South Carolina State Public Service Authority, 5.0%, 12/1/43 $ 4,250,292 --------------------------------------------------------------------------------------------------------------------- Municipal Transportation -- 0.1% 1,600,000 AA/Aa2 Harris County Metropolitan Transit Authority, 5.0%, 11/1/41 $ 1,668,608 600,000 AA-/Aa3 Port Authority of New York & New Jersey, 4.458%, 10/1/62 544,026 ------------------- $ 2,212,634 --------------------------------------------------------------------------------------------------------------------- Municipal Water -- 0.9% 2,400,000 AAA/Aa1 City of Charleston South Carolina Waterworks & Sewer System Revenue, 5.0%, 1/1/35 $ 2,593,104 2,800,000 AAA/Aa1 City of Charleston South Carolina Waterworks & Sewer System Revenue, 5.0%, 1/1/41 2,991,296 3,275,000 AA-/Aa3 City of San Francisco California Public Utilities Commission Water Revenue, 5.0%, 11/1/37 3,454,274 The accompanying notes are an integral part of these financial statements. 62 Pioneer Bond Fund | Annual Report | 6/30/13 --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- Municipal Water -- (continued) 800,000 AAA/Aa2 Hampton Roads Sanitation District, 5.0%, 4/1/38 $ 842,072 1,415,000 AAA/Aaa Metropolitan Water Reclamation District of Greater Chicago, 5.0%, 12/1/30 1,532,162 1,200,000 AAA/Aaa Metropolitan Water Reclamation District of Greater Chicago, 5.0%, 12/1/32 1,291,296 1,750,000 AAA/NR Tarrant Regional Water District, 5.0%, 3/1/52 1,807,085 ------------------- $ 14,511,289 --------------------------------------------------------------------------------------------------------------------- Municipal Obligation -- 0.3% 1,800,000 AAA/Aa1 State of Florida, 4.0%, 6/1/27 $ 1,843,668 560,000 AA+/Aa1 State of Washington, 3.0%, 7/1/28 488,914 1,660,000 AA+/Aa1 State of Washington, 5.0%, 7/1/18 1,933,684 1,400,000 AA+/Aa1 State of Washington, 5.0%, 8/1/39 1,488,942 ------------------- $ 5,755,208 --------------------------------------------------------------------------------------------------------------------- TOTAL MUNICIPAL BONDS (Cost $108,858,572) $ 111,883,254 --------------------------------------------------------------------------------------------------------------------- SENIOR FLOATING RATE LOAN INTERESTS -- 5.4%** ENERGY -- 0.2% Integrated Oil & Gas -- 0.1% 2,005,939 4.50 BBB/Baa2 Glenn Pool Oil & Gas Trust, Term Loan, 5/2/16 $ 2,015,969 --------------------------------------------------------------------------------------------------------------------- Oil & Gas Refining & Marketing -- 0.1% 1,446,125 3.75 BB/Ba2 Pilot Travel Centers LLC, Refinancing Tranche B Term Loan, 3/30/18 $ 1,425,518 ------------------- Total Energy $ 3,441,487 --------------------------------------------------------------------------------------------------------------------- MATERIALS -- 0.3% Commodity Chemicals -- 0.1% 781,786 4.50 NR/Ba2 Tronox, Inc., New Term Loan, 1/24/17 $ 786,812 --------------------------------------------------------------------------------------------------------------------- Diversified Chemicals -- 0.0%+ 125,851 3.03 BBB/Ba1 Celanese US Holdings LLC, Dollar Term C Loan (Extended), 10/31/16 $ 127,004 --------------------------------------------------------------------------------------------------------------------- Specialty Chemicals -- 0.1% 1,611,537 5.59 BB+/Ba1 Chemtura Corp., Term Facility, 8/29/16 $ 1,621,610 257,302 2.73 BB+/Ba1 Huntsman International LLC, Extended Term B Loan, 4/19/17 258,335 ------------------- $ 1,879,945 --------------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/13 63 Schedule of Investments | 6/30/13 (continued) --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- Metal & Glass Containers -- 0.0%+ 422,875 4.50 B/B1 BWAY Holding Co., Initial Term Loan, 8/31/17 $ 424,989 --------------------------------------------------------------------------------------------------------------------- Precious Metals & Minerals -- 0.1% 1,181,750 5.25 BB-/B1 Fairmount Minerals, Ltd., Tranche B Term Loan, 3/15/17 $ 1,185,074 ------------------- Total Materials $ 4,403,824 --------------------------------------------------------------------------------------------------------------------- CAPITAL GOODS -- 0.5% Aerospace & Defense -- 0.4% 1,362,245 6.25 B-/B2 DAE Aviation Holdings, Inc., Tranche B-1 Loan, 11/2/18 $ 1,363,948 617,552 6.25 B/B2 Standard Aero, Ltd., Tranche B-2 Loan, 11/2/18 618,324 1,316,700 3.75 BBB-/Ba2 DigitalGlobe, Inc., Term Loan, 1/31/20 1,316,289 743,451 6.25 BB-/WR DynCorp International, Inc., Term Loan, 7/7/16 748,098 641,875 3.75 BBB-/Ba1 Spirit Aerosystems, Inc., Term B Loan, 4/18/19 647,759 1,565,223 4.50 BB-/B1 Tasc, Inc., New Tranche B Term Loan, 12/18/15 1,570,114 ------------------- $ 6,264,532 --------------------------------------------------------------------------------------------------------------------- Trading Companies & Distributors -- 0.1% 2,353,175 4.50 B+/Ba3 WESCO International, Inc., Tranche B-1 Loan, 12/4/19 $ 2,362,421 ------------------- Total Capital Goods $ 8,626,953 --------------------------------------------------------------------------------------------------------------------- COMMERCIAL SERVICES & SUPPLIES -- 0.2% Environmental & Facilities Services -- 0.2% 2,549,865 2.19 NR/WR Synagro Technologies, Inc., Term Loan (First Lien), 4/2/14 $ 2,511,617 ------------------- Total Commercial Services & Supplies $ 2,511,617 --------------------------------------------------------------------------------------------------------------------- TRANSPORTATION -- 0.1% Air Freight & Logistics -- 0.1% 462,700 0.18 NR/NR CEVA Group Plc, Dollar Tranche B Pre-Funded Term Loan, 8/31/16 $ 434,938 351,403 5.28 NR/NR CEVA Group Plc, EGL Tranche B Term Loan, 8/31/16 338,665 843,532 5.28 CCC+/B3 CEVA Group Plc, US Tranche B Term Loan, 8/31/16 799,247 ------------------- $ 1,572,850 ------------------- Total Transportation $ 1,572,850 --------------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 64 Pioneer Bond Fund | Annual Report | 6/30/13 --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- AUTOMOBILES & COMPONENTS -- 0.5% Auto Parts & Equipment -- 0.3% 236,793 3.20 BB-/Ba3 Allison Transmission, Inc., New Term B-2 Loan, 8/7/17 $ 237,927 1,005,278 4.25 BB-/Ba3 Allison Transmission, Inc., Term B-3 Loan, 8/15/19 1,011,718 1,047,162 2.13 B/B1 Federal-Mogul Corp., Tranche B Term Loan, 12/29/14 1,002,096 534,266 2.13 B/B1 Federal-Mogul Corp., Tranche C Term Loan, 12/29/14 511,274 836,566 5.50 NR/NR TI Group Automotive Systems LLC, Additional Term Loan, 3/28/19 844,137 688,096 3.75 BB/Ba2 Tomkins LLC, Term B-2 Loan, 9/29/16 692,611 ------------------- $ 4,299,763 --------------------------------------------------------------------------------------------------------------------- Tires & Rubber -- 0.2% 4,190,000 4.75 BB/Ba1 Goodyear Tire & Rubber Co., Loan (Second Lien), 4/30/19 $ 4,207,024 ------------------- Total Automobiles & Components $ 8,506,787 --------------------------------------------------------------------------------------------------------------------- CONSUMER DURABLES & APPAREL -- 0.1% Apparel, Accessories & Luxury Goods -- 0.1% 905,730 3.25 BBB-/Ba1 PVH Corp., Tranche B Term Loan, 2/13/19 $ 906,484 ------------------- Total Consumer Durables & Apparel $ 906,484 --------------------------------------------------------------------------------------------------------------------- CONSUMER SERVICES -- 0.1% Casinos & Gaming -- 0.1% 1,061,563 4.00 BB+/Ba1 Pinnacle Entertainment, Inc., Series A Incremental Term Loan, 3/19/19 $ 1,064,549 --------------------------------------------------------------------------------------------------------------------- Restaurants -- 0.0%+ 486,325 3.75 BB/Ba3 Burger King Corp., Tranche B Term Loan (2012), 9/28/19 $ 489,017 ------------------- Total Consumer Services $ 1,553,566 --------------------------------------------------------------------------------------------------------------------- MEDIA -- 0.6% Advertising -- 0.1% 1,081,346 6.50 B-/B2 Affinion Group, Inc., Tranche B Term Loan, 10/9/16 $ 1,030,176 --------------------------------------------------------------------------------------------------------------------- Broadcasting -- 0.1% 2,300,409 4.50 B+/B2 Univision Communications, Inc., 2013 Converted Extended First-Lien Term Loan, 2/22/20 $ 2,283,568 --------------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/13 65 Schedule of Investments | 6/30/13 (continued) --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- Cable & Satellite -- 0.1% 1,725,000 3.00 BB+/Baa3 Charter Communications Operating LLC, Term F Facility Loan, 1/3/21 $ 1,717,933 --------------------------------------------------------------------------------------------------------------------- Movies & Entertainment -- 0.2% 684,691 3.75 NR/Baa3 Cinedigm Digital Funding I LLC, Term Loan, 2/28/18 $ 686,403 1,644,793 4.50 BB-/Ba2 Live Nation Entertainment, Inc., Term B Loan, 11/7/16 1,657,458 ------------------- $ 2,343,861 --------------------------------------------------------------------------------------------------------------------- Publishing -- 0.1% 2,252,319 3.75 B+/Ba3 Interactive Data Corp., Refinanced Term Loan, 2/11/18 $ 2,245,280 ------------------- Total Media $ 9,620,818 --------------------------------------------------------------------------------------------------------------------- RETAILING -- 0.2% Automotive Retail -- 0.2% 3,836,700 4.25 BB/NR Chrysler Group LLC, Tranche B Term Loan, 5/24/17 $ 3,857,583 ------------------- Total Retailing $ 3,857,583 --------------------------------------------------------------------------------------------------------------------- FOOD, BEVERAGE & TOBACCO -- 0.0%+ Packaged Foods & Meats -- 0.0%+ 23,940 3.25 BB/Ba3 Pinnacle Foods Finance LLC, New Term Loan G, 4/29/20 $ 23,848 ------------------- Total Food, Beverage & Tobacco $ 23,848 --------------------------------------------------------------------------------------------------------------------- HOUSEHOLD & PERSONAL PRODUCTS -- 0.1% Household Products -- 0.0%+ 324,836 5.25 B-/B2 Wash Multifamily Laundry Systems, LLC U.S. Term Loan, 2/21/19 $ 326,866 --------------------------------------------------------------------------------------------------------------------- Personal Products -- 0.1% 861,429 3.50 BB-/Ba3 NBTY, Inc., Term B-2 Loan, 10/1/17 $ 862,954 ------------------- Total Household & Personal Products $ 1,189,820 --------------------------------------------------------------------------------------------------------------------- HEALTH CARE EQUIPMENT & SERVICES -- 0.7% Health Care Equipment -- 0.0%+ 694,750 4.50 BBB-/Ba2 Hologic, Inc., Tranche B Term Loan, 4/29/19 $ 697,952 --------------------------------------------------------------------------------------------------------------------- Health Care Supplies -- 0.1% 2,166,633 5.00 BB-/B1 Immucor, Inc., Term B-2 Loan, 8/19/18 $ 2,175,661 --------------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 66 Pioneer Bond Fund | Annual Report | 6/30/13 --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- Health Care Services -- 0.1% 547,250 6.75 B+/B1 Ardent Medical Services, Inc., 1st Lien Term Loan, 7/2/18 $ 550,214 390,000 4.50 BB-/Ba2 DaVita HealthCare Partners, Inc., Tranche B Term Loan, 10/20/16 392,557 ------------------- $ 942,771 --------------------------------------------------------------------------------------------------------------------- Health Care Facilities -- 0.5% 2,199,732 3.77 BB/Ba2 Community Health Systems, Inc., Extended Term Loan, 7/25/14 $ 2,205,231 747,900 2.95 BB/Ba3 HCA, Inc., Tranche B-4 Term Loan, 5/1/18 745,797 1,793,613 3.03 BB/Ba3 HCA, Inc., Tranche B-5 Term Loan, 3/31/17 1,787,073 1,629,366 3.50 BB-/Ba3 Health Management Associates, Inc., Replacement Term B Loan, 11/18/18 1,629,366 955,684 2.44 BB+/Ba2 Universal Health Services, Inc., Tranche B-1 Term Loan, 11/15/16 958,671 ------------------- $ 7,326,138 --------------------------------------------------------------------------------------------------------------------- Health Care Technology -- 0.0%+ 457,795 3.75 NR/Ba3 IMS Healthcare, Inc., Tranche B-1 Dollar Term Loan, 9/1/17 $ 458,424 ------------------- Total Health Care Equipment & Services $ 11,600,946 --------------------------------------------------------------------------------------------------------------------- PHARMACEUTICALS, BIOTECHNOLOGY & LIFE SCIENCES -- 0.4% Biotechnology -- 0.1% 1,004,956 4.25 BB+/Ba2 Grifols, Inc., New U.S. Tranche B Term Loan, 6/4/17 $ 1,011,506 --------------------------------------------------------------------------------------------------------------------- Pharmaceuticals -- 0.1% 152,673 4.00 BB+/Ba1 Endo Health Solutions, Inc., Term Loan B 2011, 6/18/18 $ 152,782 1,697,542 3.50 BBB-/Baa2 RPI Finance Trust, 6.75 Year Term Loan (2012), 5/9/18 1,701,786 621,875 3.50 NR/Ba1 Valeant Pharmaceuticals International, Inc., Series C-1 Tranche B Term Loan, 12/11/19 618,183 ------------------- $ 2,472,751 --------------------------------------------------------------------------------------------------------------------- Life Sciences Tools & Services -- 0.2% 2,700,440 3.70 BB-/Ba3 Catalent Pharma Solutions, Inc., Refinancing Dollar Term-1 (2016), 9/15/16 $ 2,691,439 ------------------- Total Pharmaceuticals, Biotechnology & Life Sciences $ 6,175,696 --------------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/13 67 Schedule of Investments | 6/30/13 (continued) --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 0.1% Other Diversified Financial Services -- 0.1% 198,004 4.75 B/B1 WideOpenWest Finance LLC, Term B Loan, 3/27/19 $ 198,808 999,288 5.25 BB/Ba3 Ship Luxco 3 S.a.r.l., Facility B2AII Term Loan, 11/29/19 1,007,532 ------------------- $ 1,206,340 ------------------- Total Diversified Financials $ 1,206,340 --------------------------------------------------------------------------------------------------------------------- INSURANCE -- 0.5% Insurance Brokers -- 0.1% 1,746,201 3.70 B+/B1 HUB International, Term Loan, 6/13/17 $ 1,749,631 --------------------------------------------------------------------------------------------------------------------- Property & Casualty Insurance -- 0.4% 6,303,325 5.25 B-/B1 USI, Inc., Initial Term Loan, 12/27/19 $ 6,324,006 ------------------- Total Insurance $ 8,073,637 --------------------------------------------------------------------------------------------------------------------- SOFTWARE & SERVICES -- 0.2% Internet Software & Services -- 0.1% 1,388,050 4.00 BB+/Ba3 Autotrader.com, Inc., Tranche B-1 Term Loan, 12/15/16 $ 1,399,841 --------------------------------------------------------------------------------------------------------------------- IT Consulting & Other Services -- 0.1% 1,017,010 3.94 BB/Ba3 SunGard Data Systems, Inc., Tranche C Term Loan, 2/28/17 $ 1,019,552 --------------------------------------------------------------------------------------------------------------------- Application Software -- 0.0%+ 376,387 3.20 BB+/Baa2 Nuance Communications, Inc., Term C Loan, 3/31/16 $ 377,892 --------------------------------------------------------------------------------------------------------------------- Systems Software -- 0.0%+ 130,875 2.20 BBB-/Ba2 The Reynolds & Reynolds Co., Tranche B Term Loan, 3/9/18 $ 131,366 ------------------- Total Software & Services $ 2,928,651 --------------------------------------------------------------------------------------------------------------------- TECHNOLOGY HARDWARE & EQUIPMENT -- 0.3% Communications Equipment -- 0.3% 925,793 3.75 BB/Ba2 CommScope, Inc., Tranche 2 Term Loan, 1/14/18 $ 928,976 2,958,172 4.00 BBB-/Ba3 Riverbed Technology, Inc., Loan, 12/18/19 2,976,661 ------------------- $ 3,905,637 --------------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 68 Pioneer Bond Fund | Annual Report | 6/30/13 --------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (b) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------------------------- Electronic Components -- 0.0%+ 387,481 2.45 BB+/Ba2 Flextronics International, Ltd., A Closing Date Loan, 10/1/14 $ 388,127 71,616 2.45 BB+/Ba2 Flextronics International, Ltd., A-1-A Delayed Draw Loan, 10/1/14 71,735 45,584 2.45 BB+/Ba2 Flextronics International, Ltd., A-2 Delayed Draw Loan, 10/1/14 45,660 53,182 2.45 BB+/Ba2 Flextronics International, Ltd., A-3 Delayed Draw Loan, 10/1/14 53,270 ------------------- $ 558,792 ------------------- Total Technology Hardware & Equipment $ 4,464,429 --------------------------------------------------------------------------------------------------------------------- SEMICONDUCTORS & SEMICONDUCTOR EQUIPMENT -- 0.2% Semiconductor Equipment -- 0.2% 3,048,411 4.50 BB-/B1 Aeroflex, Inc., Tranche B-1 Term Loan, 11/9/19 $ 3,059,843 --------------------------------------------------------------------------------------------------------------------- Semiconductors -- 0.0%+ 854,350 3.75 BB/Ba2 Microsemi Corp., Term Loan, 2/19/20 $ 859,333 ------------------- Total Semiconductors & Semiconductor Equipment $ 3,919,176 --------------------------------------------------------------------------------------------------------------------- UTILITIES -- 0.1% Independent Power Producers & Energy Traders -- 0.1% 1,342,660 2.75 BB+/Baa3 NRG Energy, Inc., Term Loan (2013), 7/1/18 $ 1,332,111 802,775 4.75 BB+/Ba1 NSG Holdings LLC, New Term Loan, 12/11/19 816,824 ------------------- $ 2,148,935 ------------------- Total Utilities $ 2,148,935 --------------------------------------------------------------------------------------------------------------------- TOTAL SENIOR FLOATING RATE LOAN INTERESTS (Cost $85,349,751) $ 86,733,447 --------------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/13 69 Schedule of Investments | 6/30/13 (continued) --------------------------------------------------------------------------------------------------------------------- Shares Value --------------------------------------------------------------------------------------------------------------------- RIGHTS / WARRANTS -- 0.0%+ AUTOMOBILES & COMPONENTS -- 0.0%+ Auto Parts & Equipment -- 0.0%+ 247 Lear Corp., 11/9/14 $ 28,714 ------------------- Total Automobiles & Components $ 28,714 --------------------------------------------------------------------------------------------------------------------- TOTAL RIGHTS / WARRANTS (Cost $13,341) $ 28,714 --------------------------------------------------------------------------------------------------------------------- TOTAL INVESTMENT IN SECURITIES -- 98.3% (Cost $1,532,385,721) (a) $ 1,588,414,267 --------------------------------------------------------------------------------------------------------------------- OTHER ASSETS & LIABILITIES -- 1.7% $ 26,972,071 --------------------------------------------------------------------------------------------------------------------- TOTAL NET ASSETS -- 100.0% $ 1,615,386,338 ===================================================================================================================== CREDIT DEFAULT SWAP AGREEMENTS --------------------------------------------------------------------------------------------------------------------- Notional Swap Counterparty/ Unrealized Principal($) Referenced Obligation Appreciation --------------------------------------------------------------------------------------------------------------------- 14,000,000 JPMorgan Chase & Co., Index: Markit CDX.NA.IG.18, 1.0%, 6/20/17 $ 195,506 --------------------------------------------------------------------------------------------------------------------- TOTAL CREDIT DEFAULT SWAP AGREEMENTS (Cost $3,045) $ 195,506 --------------------------------------------------------------------------------------------------------------------- NR Not rated by either S&P or Moody's. WR Withdrawn rating. REIT Real Estate Investment Trust. + Rounds to less than 0.05%. (Perpetual) Security with no stated maturity date. (Cat Bond) Catastrophe bond is a high-yield debt instrument that is usually insurance linked and meant to raise money in case of a catastrophe. (Step) 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, 2013, the value of these securities amounted to $408,370,165 or 25.3% 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. The accompanying notes are an integral part of these financial statements. 70 Pioneer Bond Fund | Annual Report | 6/30/13 (a) At June 30, 2013, the net unrealized appreciation on investments based on cost for federal income tax purposes of $1,535,003,268 was as follows: Aggregate gross unrealized appreciation for all investments in which there is an excess of value over tax cost $ 79,564,569 Aggregate gross unrealized depreciation for all investments in which there is an excess of tax cost over value (26,153,570) ------------ Net unrealized appreciation $ 53,410,999 ============ (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). See Notes to Financial Statements -- Note 1A. Purchases and sales of securities (excluding temporary cash investments) for the year ended June 30, 2013 were as follows: ---------------------------------------------------------------------- Purchases Sales ---------------------------------------------------------------------- Long-Term U.S. Government Securities $151,455,037 $102,839,254 Other Long-Term Securities $541,943,245 $324,724,699 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) as Level 3. See Notes to Financial Statements -- Note 1A. The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/13 71 Schedule of Investments | 6/30/13 (continued) The following is a summary of the inputs used as of June 30, 2013, in valuing the Fund's investments: ---------------------------------------------------------------------------------------------------- Level 1 Level 2 Level 3 Total ---------------------------------------------------------------------------------------------------- Convertible Corporate Bonds $ -- $ 13,057,996 $ -- $ 13,057,996 Preferred Stocks 22,516,855 6,663,040 2,241,535 31,421,430 Convertible Preferred Stocks 6,698,340 -- -- 6,698,340 Asset Backed Securities -- 137,243,981 -- 137,243,981 Collateralized Mortgage Obligations -- 316,604,511 -- 316,604,511 Corporate Bonds -- 570,058,746 787,549 570,846,295 U.S. Government Agency Obligations -- 313,896,299 -- 313,896,299 Municipal Bonds -- 111,883,254 -- 111,883,254 Senior Floating Rate Loan Interests -- 86,733,447 -- 86,733,447 Rights/Warrants 28,714 -- -- 28,714 ---------------------------------------------------------------------------------------------------- Total $ 29,243,909 $1,556,141,274 $ 3,029,084 $1,588,414,267 ==================================================================================================== Other Financial Instruments: Unrealized appreciation on credit default swaps $ -- $ 195,506 $ -- $ 195,506 Net unrealized appreciation on futures contracts 356,124 -- -- 356,124 ---------------------------------------------------------------------------------------------------- Total $ 356,124 $ 195,506 $ -- $ 551,630 ==================================================================================================== During the year ended June 30, 2013, there were no transfers between Levels 1, 2 and 3. The accompanying notes are an integral part of these financial statements. 72 Pioneer Bond Fund | Annual Report | 6/30/13 Following is a reconciliation of assets using significant unobservable inputs (Level 3): -------------------------------------------------------------------------------- Preferred Corporate Stocks Bonds Total -------------------------------------------------------------------------------- Balance as of 6/30/12 $ -- $ -- $ -- Realized gain (loss)1 -- -- -- Change in unrealized appreciation (depreciation)2 41,535 84,799 126,334 Purchases 2,200,000 702,750 2,902,750 Sales -- -- -- Transfers in and out of Level 3** -- -- -- -------------------------------------------------------------------------------- Balance as of 6/30/13 $ 2,241,535 $ 787,549 $ 3,029,084 ================================================================================ (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 gain (loss) on investments in the Statement of Operations. ** Transfers are calculated on the beginning of period values. The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/13 73 Statement of Assets and Liabilities | 6/30/13 ASSETS: Investment in securities (cost $1,532,385,721) $1,588,414,267 Cash 15,340,216 Futures Collateral 280,127 Receivables -- Investment securities sold 56,483,004 Fund shares sold 4,128,291 Interest 12,269,794 Dividends 217,072 Due from Pioneer Investment Management, Inc. 215,035 Variation margin 13,577 Net unrealized appreciation on futures contracts 356,124 Unrealized appreciation on credit default swaps 195,506 Other 22,071 --------------------------------------------------------------------------------------------------- Total assets $1,677,935,084 =================================================================================================== LIABILITIES: Payables -- Investment securities purchased $ 38,470,822 Fund shares repurchased 22,101,619 Dividends 1,067,036 Credit default swaps, premiums received 3,405 Due to affiliates 387,854 Accrued expenses 258,216 Credit default swap collateral 259,794 --------------------------------------------------------------------------------------------------- Total liabilities $ 62,548,746 =================================================================================================== NET ASSETS: Paid-in capital $1,579,207,574 Undistributed net investment income 155,624 Accumulated net realized loss on investments and futures contracts (20,557,036) Net unrealized appreciation on investments 56,028,546 Net unrealized appreciation on credit default swap 195,506 Net unrealized appreciation on futures contracts 356,124 --------------------------------------------------------------------------------------------------- Total net assets $1,615,386,338 =================================================================================================== NET ASSET VALUE PER SHARE: (No par value, unlimited number of shares authorized) Class A (based on $565,569,080/58,468,501 shares) $ 9.67 Class B (based on $8,804,710/915,808 shares) $ 9.61 Class C (based on $87,762,980/9,173,621 shares) $ 9.57 Class K (based on $9,736/1,007 shares) $ 9.67 Class R (based on $31,168,876/3,193,540 shares) $ 9.76 Class Y (based on $916,182,104/95,609,344 shares) $ 9.58 Class Z (based on $5,888,852/607,270 shares) $ 9.70 MAXIMUM OFFERING PRICE: Class A ($9.67 / 95.5% ) $ 10.13 =================================================================================================== The accompanying notes are an integral part of these financial statements. 74 Pioneer Bond Fund | Annual Report | 6/30/13 Statement of Operations For the Year Ended 6/30/13 INVESTMENT INCOME: Interest $ 71,728,059 Dividends 2,022,666 ----------------------------------------------------------------------------------------------- Total investment income $ 73,750,725 =============================================================================================== EXPENSES: Management fees $ 7,666,695 Transfer agent fees Class A 315,452 Class B 42,602 Class C 46,733 Class R 8,432 Class Y 70,472 Class Z 7,790 Distribution fees Class A 1,324,184 Class B 113,153 Class C 985,984 Class R 137,342 Shareholder communications expense 1,699,372 Administrative reimbursements 463,117 Custodian fees 145,415 Registration fees 254,493 Professional fees 122,683 Printing expense 48,602 Fees and expenses of nonaffiliated Trustees 65,725 Miscellaneous 284,757 ----------------------------------------------------------------------------------------------- Total expenses $ 13,803,003 Less fees waived and expenses reimbursed by Pioneer Investment Management, Inc. (905,790) ----------------------------------------------------------------------------------------------- Net expenses $ 12,897,213 ----------------------------------------------------------------------------------------------- Net investment income $ 60,853,512 ----------------------------------------------------------------------------------------------- REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS, FUTURES CONTRACTS AND CREDIT DEFAULT SWAP: Net realized gain (loss) on: Investments $ (1,979,539) Futures contracts 1,686,471 Credit default swap 141,945 $ (151,123) ----------------------------------------------------------------------------------------------- Change in net unrealized appreciation (depreciation) on: Investments $ (15,055,055) Futures contracts 24,434 Credit default swap 272,128 $ (14,758,493) ----------------------------------------------------------------------------------------------- Net loss on investments, futures contracts and credit default swap $ (14,909,616) ----------------------------------------------------------------------------------------------- Net increase in net assets resulting from operations $ 45,943,896 =============================================================================================== The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/13 75 Statements of Changes in Net Assets -------------------------------------------------------------------------------------------------- Year Ended Year Ended 6/30/13 6/30/12 -------------------------------------------------------------------------------------------------- FROM OPERATIONS: Net investment income $ 60,853,512 $ 59,027,080 Net realized loss on investments, futures contracts and credit default swaps (151,123) (335,503) Change in net unrealized appreciation (depreciation) on investments, futures contracts and credit default swap (14,758,493) 17,926,112 -------------------------------------------------------------------------------------------------- Net increase in net assets resulting from operations $ 45,943,896 $ 76,617,689 -------------------------------------------------------------------------------------------------- DISTRIBUTIONS TO SHAREOWNERS: Net investment income: Class A ($0.37 and $0.43 per share, respectively) $ (19,971,054) $ (19,730,298) Class B ($0.27 and $0.33 per share, respectively) (315,610) (543,288) Class C ($0.29 and $0.35 per share, respectively) (2,893,417) (3,283,618) Class K ($0.21 and $0.00 per share, respectively) (215) -- Class R ($0.34 and $0.40 per share, respectively) (922,219) (844,452) Class Y ($0.39 and $0.45 per share, respectively) (36,953,978) (36,596,527) Class Z ($0.40 and $0.46 per share, respectively) (201,696) (63,937) Net realized gain: Class A ($0.00 and $0.05 per share, respectively) -- (2,175,260) Class B ($0.00 and $0.05 per share, respectively) -- (84,708) Class C ($0.00 and $0.05 per share, respectively) -- (468,609) Class R ($0.00 and $0.05 per share, respectively) -- (100,096) Class Y ($0.00 and $0.05 per share, respectively) -- (4,001,897) Class Z ($0.00 and $0.05 per share, respectively) -- (4,956) -------------------------------------------------------------------------------------------------- Total distributions to shareowners $ (61,258,189) $ (67,897,646) -------------------------------------------------------------------------------------------------- FROM FUND SHARE TRANSACTIONS: Net proceeds from sale or exchange of shares $ 622,314,487 $ 495,304,090 Reinvestment of distributions 46,411,448 41,060,757 Cost of shares repurchased (471,635,739) (452,496,717) -------------------------------------------------------------------------------------------------- Net increase in net assets resulting from Fund share transactions $ 197,090,196 $ 83,868,130 -------------------------------------------------------------------------------------------------- Net increase in net assets $ 181,775,903 $ 92,588,173 -------------------------------------------------------------------------------------------------- NET ASSETS: Beginning of year 1,433,610,435 1,341,022,262 -------------------------------------------------------------------------------------------------- End of year $1,615,386,338 $1,433,610,435 ================================================================================================== Undistributed (distributions in excess of) net investment income $ 155,624 $ (1,392,581) ================================================================================================== The accompanying notes are an integral part of these financial statements. 76 Pioneer Bond Fund | Annual Report | 6/30/13 ------------------------------------------------------------------------------------------------ '13 Shares '13 Amount '12 Shares '12 Amount ------------------------------------------------------------------------------------------------ Class A Shares sold 24,375,983 $ 241,840,642 16,727,695 $ 161,640,303 Reinvestment of distributions 1,779,061 17,627,684 1,828,665 17,631,168 Less shares repurchased (14,312,751) (141,497,556) (23,798,695) (230,385,873) ------------------------------------------------------------------------------------------------ Net increase (decrease) 11,842,293 $ 117,970,770 (5,242,335) $ (51,114,402) ================================================================================================ Class B Shares exchanged 88,345 $ 868,374 247,924 $ 2,395,584 Reinvestment of distributions 28,586 281,456 60,804 582,295 Less shares repurchased (538,851) (5,303,792) (895,246) (8,592,690) ------------------------------------------------------------------------------------------------ Net decrease (421,920) $ (4,153,962) (586,518) $ (5,614,811) ================================================================================================ Class C Shares sold 2,835,146 $ 27,818,936 3,526,577 $ 33,738,657 Reinvestment of distributions 216,666 2,124,028 270,485 2,578,644 Less shares repurchased (3,614,367) (35,367,504) (2,738,794) (26,122,885) ------------------------------------------------------------------------------------------------ Net increase (decrease) (562,555) $ (5,424,540) 1,058,268 $ 10,194,416 ================================================================================================ Class K* Shares sold 1,007 $ 10,000 -- $ -- Reinvestment of distributions -- -- -- -- Less shares repurchased -- -- -- -- ------------------------------------------------------------------------------------------------ Net increase 1,007 $ 10,000 -- $ -- ================================================================================================ Class R Shares sold 1,825,311 $ 18,270,357 1,408,283 $ 13,985,377 Reinvestment of distributions 83,994 839,417 80,268 780,766 Less shares repurchased (1,149,162) (11,490,246) (1,160,309) (11,320,599) ------------------------------------------------------------------------------------------------ Net increase 760,143 $ 7,619,528 328,242 $ 3,445,544 ================================================================================================ Class Y Shares sold 33,476,220 $ 328,848,985 29,204,230 $ 277,000,768 Reinvestment of distributions 2,580,484 25,341,202 2,032,263 19,420,618 Less shares repurchased (28,264,359) (276,929,646) (18,352,855) (175,882,776) ------------------------------------------------------------------------------------------------ Net increase 7,792,345 $ 77,260,541 12,883,638 $ 120,538,610 ================================================================================================ Class Z Shares sold 468,315 $ 4,657,193 156,608 $ 6,543,401 Reinvestment of distributions 19,896 197,661 6,949 67,266 Less shares repurchased (106,004) (1,046,995) (19,851) (191,894) ------------------------------------------------------------------------------------------------ Net increase 382,207 $ 3,807,859 143,706 $ 6,418,773 ================================================================================================ * Class K shares were first publicly offered on December 20, 2012. The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/13 77 Financial Highlights --------------------------------------------------------------------------------------------------------------------------- Year Year Year Year Year Ended Ended Ended Ended Ended 6/30/13 6/30/12 6/30/11 6/30/10 6/30/09 --------------------------------------------------------------------------------------------------------------------------- Class A Net asset value, beginning of period $ 9.73 $ 9.66 $ 9.44 $ 8.63 $ 9.10 --------------------------------------------------------------------------------------------------------------------------- Increase from investment operations: Net investment income $ 0.38 $ 0.42 $ 0.45 $ 0.45 $ 0.50 Net realized and unrealized gain (loss) on investments (0.07) 0.13 0.21 0.80 (0.31) --------------------------------------------------------------------------------------------------------------------------- Net increase from investment operations $ 0.31 $ 0.55 $ 0.66 $ 1.25 $ 0.19 --------------------------------------------------------------------------------------------------------------------------- Distributions to shareowners: Net investment income (0.37) (0.43) (0.44) (0.44) (0.55) Net realized gain -- (0.05) -- -- (0.11) --------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ (0.06) $ 0.07 $ 0.22 $ 0.81 $ (0.47) --------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 9.67 $ 9.73 $ 9.66 $ 9.44 $ 8.63 =========================================================================================================================== Total return* 3.21% 5.91% 7.08% 14.71% 2.65% Ratio of net expenses to average net assets+ 0.85% 0.85% 0.85% 0.85% 0.89%(a) Ratio of net investment income to average net assets+ 3.77% 4.35% 4.63% 4.86% 5.88% Portfolio turnover rate 28% 21% 36% 41% 34% Net assets, end of period (in thousands) $565,569 $453,772 $500,905 $420,706 $320,036 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses 1.01% 1.03% 1.06% 1.07% 1.09% Net investment income 3.61% 4.17% 4.42% 4.64% 5.68% Ratios with waiver of fees and assumption of expenses by the Adviser and reduction for fees paid indirectly: Net expenses 0.85% 0.85% 0.85% 0.85% 0.89%(a) Net investment income 3.77% 4.35% 4.63% 4.86% 5.88% =========================================================================================================================== * 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. + Ratio with no reduction for fees paid indirectly. (a) On October 1, 2008, Pioneer contractually lowered Class A shares' expense limitation from 1.00% to 0.85% of the average daily net assets attributable to Class A shares. The expense limit will be in effect through November 1, 2013. The accompanying notes are an integral part of these financial statements. 78 Pioneer Bond Fund | Annual Report | 6/30/13 ----------------------------------------------------------------------------------------------------------------------------- Year Year Year Year Year Ended Ended Ended Ended Ended 6/30/13 6/30/12 6/30/11 6/30/10 6/30/09 ----------------------------------------------------------------------------------------------------------------------------- Class B Net asset value, beginning of period $ 9.67 $ 9.60 $ 9.38 $ 8.58 $ 9.05 ----------------------------------------------------------------------------------------------------------------------------- Increase from investment operations: Net investment income $ 0.27 $ 0.31 $ 0.35 $ 0.35 $ 0.42 Net realized and unrealized gain (loss) on investments (0.06) 0.14 0.21 0.79 (0.31) ----------------------------------------------------------------------------------------------------------------------------- Net increase from investment operations $ 0.21 $ 0.45 $ 0.56 $ 1.14 $ 0.11 ----------------------------------------------------------------------------------------------------------------------------- Distributions to shareowners: Net investment income (0.27) (0.33) (0.34) (0.34) (0.47) Net realized gain -- (0.05) -- -- (0.11) ----------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ (0.06) $ 0.07 $ 0.22 $ 0.80 $ (0.47) ----------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 9.61 $ 9.67 $ 9.60 $ 9.38 $ 8.58 ============================================================================================================================= Total return* 2.15% 4.82% 5.99% 13.47% 1.62% 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+ 2.78% 3.31% 3.59% 3.89% 4.90% Portfolio turnover rate 28% 21% 36% 41% 34% Net assets, end of period (in thousands) $ 8,805 $12,942 $18,474 $27,342 $31,738 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses 2.05% 2.02% 1.95% 1.98% 1.99% Net investment income 2.63% 3.19% 3.54% 3.81% 4.81% Ratios with waiver of fees and assumption of expenses by the Adviser and reduction for fees paid indirectly: Net expenses 1.90% 1.90% 1.90% 1.90% 1.90% Net investment income 2.78% 3.31% 3.59% 3.89% 4.90% ============================================================================================================================= * 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. + Ratio with no reduction for fees paid indirectly. The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/13 79 Financial Highlights (continued) ----------------------------------------------------------------------------------------------------------------------------- Year Year Year Year Year Ended Ended Ended Ended Ended 6/30/13 6/30/12 6/30/11 6/30/10 6/30/09 ----------------------------------------------------------------------------------------------------------------------------- Class C Net asset value, beginning of period $ 9.63 $ 9.55 $ 9.34 $ 8.54 $ 9.02 ----------------------------------------------------------------------------------------------------------------------------- Increase from investment operations: Net investment income $ 0.29 $ 0.33 $ 0.36 $ 0.37 $ 0.42 Net realized and unrealized gain (loss) on investments (0.06) 0.15 0.20 0.78 (0.31) ----------------------------------------------------------------------------------------------------------------------------- Net increase from investment operations $ 0.23 $ 0.48 $ 0.56 $ 1.15 $ 0.11 ----------------------------------------------------------------------------------------------------------------------------- Distributions to shareowners: Net investment income (0.29) (0.35) (0.35) (0.35) (0.48) Net realized gain -- (0.05) -- -- (0.11) ----------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ (0.06) $ 0.08 $ 0.21 $ 0.80 $ (0.48) ----------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 9.57 $ 9.63 $ 9.55 $ 9.34 $ 8.54 ============================================================================================================================= Total return* 2.33% 5.12% 6.06% 13.63% 1.62% Ratio of net expenses to average net assets+ 1.72% 1.73% 1.73% 1.79% 1.83% Ratio of net investment income to average net assets+ 2.93% 3.47% 3.75% 3.91% 4.93% Portfolio turnover rate 28% 21% 36% 41% 34% Net assets, end of period (in thousands) $87,763 $93,737 $82,915 $81,892 $53,045 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses 1.72% 1.73% 1.73% 1.79% 1.83% Net investment income 2.93% 3.47% 3.75% 3.91% 4.93% Ratios with waiver of fees and assumption of expenses by the Adviser and reduction for fees paid indirectly: Net expenses 1.72% 1.73% 1.73% 1.79% 1.83% Net investment income 2.93% 3.47% 3.75% 3.91% 4.93% ============================================================================================================================= * 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. + Ratio with no reduction for fees paid indirectly. The accompanying notes are an integral part of these financial statements. 80 Pioneer Bond Fund | Annual Report | 6/30/13 ----------------------------------------------------------------------------------------------- 12/20/12 (a) to 6/30/13 ----------------------------------------------------------------------------------------------- Class K Net asset value, beginning of period $ 9.94 ----------------------------------------------------------------------------------------------- Decrease from investment operations: Net investment income $ 0.20 Net realized and unrealized loss on investments (0.26) ----------------------------------------------------------------------------------------------- Net decrease from investment operations $ (0.06) ----------------------------------------------------------------------------------------------- Distributions to shareowners: Net investment income (0.21) Net realized gain -- ----------------------------------------------------------------------------------------------- Net decrease in net asset value $ (0.27) ----------------------------------------------------------------------------------------------- Net asset value, end of period $ 9.67 =============================================================================================== Total return* (0.61)%(b) Ratio of net expenses to average net assets+ 0.57%** Ratio of net investment income to average net assets+ 3.86%** Portfolio turnover rate 28%** Net assets, end of period (in thousands) $ 10 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses 0.57%** Net investment income 3.86%** Ratios with waiver of fees and assumption of expenses by the Adviser and reduction for fees paid indirectly: Net expenses 0.57%** Net investment income 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. + Ratio with no reduction for fees paid indirectly. (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. Pioneer Bond Fund | Annual Report | 6/30/13 81 Financial Highlights (continued) ----------------------------------------------------------------------------------------------------------------------------- Year Year Year Year Year Ended Ended Ended Ended Ended 6/30/13 6/30/12 6/30/11 6/30/10 6/30/09 ----------------------------------------------------------------------------------------------------------------------------- Class R Net asset value, beginning of period $ 9.82 $ 9.74 $ 9.52 $ 8.71 $ 9.18 ----------------------------------------------------------------------------------------------------------------------------- Increase from investment operations: Net investment income $ 0.34 $ 0.39 $ 0.41 $ 0.42 $ 0.48 Net realized and unrealized gain (loss) on investments (0.06) 0.14 0.22 0.80 (0.31) ----------------------------------------------------------------------------------------------------------------------------- Net increase from investment operations $ 0.28 $ 0.53 $ 0.63 $ 1.22 $ 0.17 ----------------------------------------------------------------------------------------------------------------------------- Distributions to shareowners: Net investment income (0.34) (0.40) (0.41) (0.41) (0.53) Net realized gain -- (0.05) -- -- (0.11) ----------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ (0.06) $ 0.08 $ 0.22 $ 0.81 $ (0.47) ----------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 9.76 $ 9.82 $ 9.74 $ 9.52 $ 8.71 ============================================================================================================================= Total return* 2.80% 5.58% 6.67% 14.18% 2.35% Ratio of net expenses to average net assets+ 1.25% 1.25% 1.24% 1.25% 1.25% Ratio of net investment income to average net assets+ 3.36% 3.94% 4.25% 4.50% 5.53% Portfolio turnover rate 28% 21% 36% 41% 34% Net assets, end of period (in thousands) $31,169 $23,892 $20,508 $18,186 $15,404 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses 1.35% 1.35% 1.24% 1.26% 1.30% Net investment income 3.26% 3.84% 4.25% 4.49% 5.48% Ratios with waiver of fees and assumption of expenses by the Adviser and reduction for fees paid indirectly: Net expenses 1.25% 1.25% 1.24% 1.25% 1.25% Net investment income 3.36% 3.94% 4.25% 4.50% 5.53% ============================================================================================================================= * 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. + Ratio with no reduction for fees paid indirectly. The accompanying notes are an integral part of these financial statements. 82 Pioneer Bond Fund | Annual Report | 6/30/13 ----------------------------------------------------------------------------------------------------------------------------- Year Year Year Year Year Ended Ended Ended Ended Ended 6/30/13 6/30/12 6/30/11 6/30/10 6/30/09 ----------------------------------------------------------------------------------------------------------------------------- Class Y Net asset value, beginning of period $ 9.65 $ 9.57 $ 9.36 $ 8.55 $ 9.02 ----------------------------------------------------------------------------------------------------------------------------- Increase from investment operations: Net investment income $ 0.39 $ 0.44 $ 0.47 $ 0.47 $ 0.53 Net realized and unrealized gain (loss) on investments (0.07) 0.14 0.20 0.79 (0.31) ----------------------------------------------------------------------------------------------------------------------------- Net increase from investment operations $ 0.32 $ 0.58 $ 0.67 $ 1.26 $ 0.22 ----------------------------------------------------------------------------------------------------------------------------- Distributions to shareowners: Net investment income (0.39) (0.45) (0.46) (0.45) (0.58) Net realized gain -- (0.05) -- -- (0.11) ----------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ (0.07) $ 0.08 $ 0.21 $ 0.81 $ (0.47) ----------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 9.58 $ 9.65 $ 9.57 $ 9.36 $ 8.55 ============================================================================================================================= Total return* 3.34% 6.27% 7.25% 15.06% 2.95% Ratio of net expenses to average net assets+ 0.66% 0.65% 0.61% 0.61% 0.63% Ratio of net investment income to average net assets+ 3.97% 4.55% 4.88% 5.13% 6.10% Portfolio turnover rate 28% 21% 36% 41% 34% Net assets, end of period (in thousands) $916,182 $847,072 $717,433 $713,869 $589,661 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses 0.66% 0.65% 0.61% 0.61% 0.64% Net investment income 3.97% 4.55% 4.88% 5.13% 6.09% Ratios with waiver of fees and assumption of expenses by the Adviser and reduction for fees paid indirectly: Net expenses 0.66% 0.65% 0.61% 0.61% 0.63% Net investment income 3.97% 4.55% 4.88% 5.13% 6.10% ============================================================================================================================= * 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. + Ratio with no reduction for fees paid indirectly. The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/13 83 Financial Highlights (continued) ------------------------------------------------------------------------------------------------------------------------------ Year Year Year Year Year Ended Ended Ended Ended Ended 6/30/13 6/30/12 6/30/11 6/30/10 6/30/09 ------------------------------------------------------------------------------------------------------------------------------ Class Z Net asset value, beginning of period $ 9.76 $ 9.68 $ 9.46 $ 8.67 $ 9.10 ------------------------------------------------------------------------------------------------------------------------------ Increase from investment operations: Net investment income $ 0.40 $ 0.45 $ 0.47 $ 0.48 $ 0.54 Net realized and unrealized gain (loss) on investments (0.06) 0.14 0.21 0.77 (0.28) ------------------------------------------------------------------------------------------------------------------------------ Net increase from investment operations $ 0.34 $ 0.59 $ 0.68 $ 1.25 $ 0.26 ------------------------------------------------------------------------------------------------------------------------------ Distributions to shareowners: Net investment income (0.40) (0.46) (0.46) (0.46) (0.58) Net realized gain -- (0.05) -- -- (0.11) ------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net asset value $ (0.06) $ 0.08 $ 0.22 $ 0.79 $ (0.43) ------------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $ 9.70 $ 9.76 $ 9.68 $ 9.46 $ 8.67 ============================================================================================================================== Total return* 3.41% 6.23% 7.30% 14.68% 3.42% Ratio of net expenses to average net assets+ 0.65% 0.65% 0.65% 0.63% 0.65% Ratio of net investment income to average net assets+ 3.95% 4.50% 4.82% 5.00% 5.91% Portfolio turnover rate 28% 21% 36% 41% 34% Net assets, end of period (in thousands) $ 5,889 $2,196 $ 787 $ 720 $ 382 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses 0.87% 0.83% 0.72% 0.63% 0.67% Net investment income 3.73% 4.32% 4.75% 5.00% 5.89% Ratios with waiver of fees and assumption of expenses by the Adviser and reduction for fees paid indirectly: Net expenses 0.65% 0.65% 0.65% 0.63% 0.65% Net investment income 3.95% 4.50% 4.82% 5.00% 5.91% ============================================================================================================================== * 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. + Ratios with no fees paid indirectly. The accompanying notes are an integral part of these financial statements. 84 Pioneer Bond Fund | Annual Report | 6/30/13 Notes to Financial Statements | 6/30/13 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. Pioneer Bond Fund | Annual Report | 6/30/13 85 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. Senior loans for which no reliable price quotes are available will be valued using inputs/data furnished by Loan Pricing Corporation through the use of pricing matrices to determine valuations. Fixed income securities with remaining maturity of more than sixty days are valued at prices supplied by independent pricing services, which consider such factors as market prices, market events, quotations from one or more brokers, Treasury spreads, yields, maturities and ratings. Valuations may be supplemented by dealers and other sources, as required. 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 their 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 or at the direction or with the approval of the Valuation Committee using fair value methods pursuant to procedures adopted by the Board of Trustees. The Valuation Committee is comprised of certain members of the Board of Trustees. The Fund may use fair value methods if it is determined that a significant event has occurred after the close of the exchange or market on which the security trades and prior to the determination of the Fund's net asset value. Examples of a significant event might include political or economic news, corporate restructurings, natural disasters, terrorist activity or trading halts. Thus, the valuation of the Fund's securities may differ significantly from exchange prices and such differences could be material. Pioneer Investment 86 Pioneer Bond Fund | Annual Report | 6/30/13 Management, Inc. (PIM) 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. At June 30, 2013, one security was valued using fair value methods (in addition to securities valued using prices supplied by independent pricing services) representing 0.19% of net assets. Inputs used when applying fair value methods to value a security may include credit ratings, the financial condition of the company, current market conditions and comparable securities. Principal amounts of mortgage-backed securities, 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, 2013, the Fund did not have any interest and penalties related to uncertain tax positions, which, if applicable, would be recorded as an income tax expense in the Statement of Operations. Tax years for the prior three fiscal years are subject to examination by Federal and State tax authorities. The amount and character of income and capital gain distributions to shareowners are determined in accordance with federal income tax rules, which may differ from U.S. generally accepted accounting principles. Distributions in excess of net investment income or net realized gains are temporary overdistributions for financial statement purposes resulting from differences in the recognition or classification of income or distributions Pioneer Bond Fund | Annual Report | 6/30/13 87 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, 2013, the Fund reclassified $1,952,882 to increase undistributed net investment income and $1,952,882 to increase accumulated net realized loss on investments to reflect permanent book/tax differences. These adjustments have no impact on net assets or the results of operations. At June 30, 2013, the Fund had a net capital loss carryforward of $18,403,543 of which the following amounts will expire between 2014 and 2016 if not utilized: $3,460,905 in 2014, $7,351,686 in 2015 and $7,590,952 in 2016. The tax character of distributions paid during the years ended June 30, 2013 and June 30, 2012 was as follows: --------------------------------------------------------------------------- 2013 2012 --------------------------------------------------------------------------- Distributions paid from: Ordinary income $61,258,189 $61,062,120 Long-term capital gain -- 6,835,526 --------------------------------------------------------------------------- Total $61,258,189 $67,897,646 =========================================================================== The following shows the components of distributable earnings on a federal income tax basis at June 30, 2013: --------------------------------------------------------------------------- 2013 --------------------------------------------------------------------------- Distributable earnings: Undistributed ordinary income $ 2,242,622 Capital loss carryforward (18,403,543) Dividends payable (1,067,036) Net unrealized appreciation 53,406,721 --------------------------------------------------------------------------- Total $ 36,178,764 =========================================================================== 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. 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 $108,230 in underwriting commissions on the sale of Class A shares during the year ended June 30, 2013. 88 Pioneer Bond Fund | Annual Report | 6/30/13 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 to hedge against changes in interest rates, securities prices and currency exchange rates or to seek to increase total return. Futures contracts are types of derivatives. All futures contracts entered into by the Fund are traded on a futures exchange. Upon entering into a futures contract, the Fund is required to deposit with a broker an amount of cash or securities equal to the minimum "initial margin" Pioneer Bond Fund | Annual Report | 6/30/13 89 requirements of the associated futures exchange. Subsequent payments for futures contracts ("variation margin") are paid or received by the Fund, depending on the daily fluctuation in the value of the contracts, and are recorded by the Fund as unrealized 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. Futures contracts are subject to market risk, interest rate risk and currency exchange rate risk. Changes in value of the contracts may not directly correlate to the changes in value of the underlying securities. These risks may decrease the effectiveness of the Fund's hedging strategies and potentially result in a loss. With futures, there is minimal counterparty credit risk to the Fund since futures are exchange-traded and the exchange's clearinghouse, as counterparty to all exchange-traded futures, guarantees the futures against default. The average number of contracts open during the year ended June 30, 2013 was 865. At June 30, 2013, open futures contracts were as follows: --------------------------------------------------------------------------------- Number of Unrealized Contracts Settlement Appreciation/ Type Long/(Short) Month Value (Depreciation) --------------------------------------------------------------------------------- U.S. 5 Year Note (CBT) (374) 9/13 $(45,271,533) $ 566,092 U.S. Long Bond (CBT) 39 9/13 5,297,906 (159,656) U.S. 10 Year Note (CBT) 78 9/13 9,871,875 (31,688) U.S. 2 Year Note (CBT) (218) 9/13 (47,960,000) 37,470 U.S. Ultra Bond (CBT) 10 9/13 1,473,125 (56,094) --------------------------------------------------------------------------------- $(76,588,627) $ 356,124 --------------------------------------------------------------------------------- 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 increase the Fund's income, to add leverage to the portfolio or to hedge the risk of default on portfolio securities. As a seller of protection, the Fund would be required to pay the notional (or other agreed-upon) value of the referenced debt obligation to the counterparty in the event of a default by a U.S. or foreign corporate issuer of a debt obligation, which would likely result in a loss to the Fund. In return, the Fund would 90 Pioneer Bond Fund | Annual Report | 6/30/13 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, one party, 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 received by the Fund, as the protection seller, is recorded as a liability in the Fund's records. An upfront payment made by the Fund, as the protection buyer, is recorded as an asset in the Fund's records. Periodic payments received or paid by the Fund are recorded as realized gains or losses. The 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 gain or loss. 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. 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. During the year ended June 30, 2013, the Fund entered into one credit default swap contract, with a notional amount of $14,000,000, which was still open at year end. Credit default swap contracts outstanding at year end are listed at the end of the Fund's schedule of investments. 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, 2013, the effective management fee (excluding waivers and/or assumption of expenses) was equal to 0.48% of the Fund's average daily net assets. Pioneer Bond Fund | Annual Report | 6/30/13 91 PIM has contractually agreed to limit ordinary operating expenses to the extent required to reduce Fund expenses to 0.85%, 1.90%, 1.25% and 0.65% of the average daily net assets attributable to Class A, Class B, Class R and Class Z shares, respectively. Fees waived and expenses reimbursed during the year ended June 30, 2013 are reflected on the Statement of Operations. These expense limitations are in effect through November 1, 2014. 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 $110,278 in management fees, administrative costs and certain other reimbursements payable to PIM at June 30, 2013. 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, 2013, such out-of-pocket expenses by class of shares were as follows: -------------------------------------------------------------------------------- Shareholder Communications: -------------------------------------------------------------------------------- Class A $ 698,173 Class B 12,081 Class C 103,895 Class R 68,287 Class Y 809,696 Class Z 7,240 -------------------------------------------------------------------------------- Total $1,699,372 ================================================================================ Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $249,840 in transfer agent fees and out-of-pocket reimbursements payable to PIMSS at June 30, 2013. 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 average daily net assets attributable to Class A shares as compensation for personal services and/or account maintenance services or distribution services 92 Pioneer Bond Fund | Annual Report | 6/30/13 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 $27,736 in distribution fees payable to PFD at June 30, 2013. 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 one year of purchase are subject to a CDSC of 1.00%, based on the lower of cost or market value of shares being redeemed. Shares purchased as part of an exchange remain subject to any CDSC that applied to the original purchase of those shares. There is no CDSC for Class R, Class Y or Class Z shares. Proceeds from the CDSCs are paid to PFD. For the year ended June 30, 2013, CDSCs in the amount of $23,371 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, 2013, 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 facility in effect as of fiscal year end is in the amount of $215 million. Under such facility, depending on the type of loan, interest on borrowings is Pioneer Bond Fund | Annual Report | 6/30/13 93 payable at the London Interbank Offered Rate (LIBOR) plus 0.90% on an annualized basis, or the Alternate Base Rate, which is the greater of (a) the facility's administrative agent's daily announced prime rate on the borrowing date, (b) 2% plus the Federal Funds Rate on the borrowing date and (c) 2% plus the overnight Euro dollar rate on the borrowing date. The Funds pay an annual commitment fee to participate in the 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, 2013, the Fund had no borrowings under the credit facility. 7. Additional Disclosures about Derivative Instruments and Hedging Activities: Values of derivative instruments as of June 30, 2013 were as follows: -------------------------------------------------------------------------------------- Derivatives Not Accounted for as Hedging Instruments Asset Derivatives 2013 Liabilities Derivatives 2013 Under Accounting ----------------------------------------------------------- Standards Codification Balance Sheet Balance Sheet (ASC) 815 Location Value Location Value -------------------------------------------------------------------------------------- Interest Rate Futures* Net unrealized Net unrealized appreciation on depreciation on futures contracts $356,124 futures contracts $ -- Credit Default Swaps Net unrealized Net unrealized appreciation on depreciation on credit default credit default swaps $195,506 swaps $ -- -------------------------------------------------------------------------------------- Total $551,630 $ -- ====================================================================================== * Reflects the unrealized appreciation on futures contracts (see Note 1F). The current day's variation margin is separately disclosed on the Statement of Assets and Liabilities. 94 Pioneer Bond Fund | Annual Report | 6/30/13 The effect of derivative instruments on the Statement of Operations for the year ended June 30, 2013 was as follows: --------------------------------------------------------------------------------------------- Change in Derivatives Not Realized Unrealized Accounted for as Gain or Appreciation Hedging Instruments Loss on or (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 --------------------------------------------------------------------------------------------- Interest Rate Futures Net realized gain on futures $1,686,471 contracts Interest Rate Futures Change in unrealized appreciation $ 24,434 on futures contracts Credit Default Swaps Net realized gain on credit $ 141,945 default swaps Credit Default Swaps Change in unrealized appreciation $272,128 on credit default swaps Pioneer Bond Fund | Annual Report | 6/30/13 95 Report of Independent Registered Public Accounting Firm To the Board of Trustees and the Shareowners of Pioneer Bond Fund: -------------------------------------------------------------------------------- We have audited the accompanying statement of assets and liabilities of Pioneer Bond Fund (the "Fund"), including the schedule of investments, as of June 30, 2013, and the related statement of operations for the year then ended, the statements of changes in net assets for each of the two years in the period then ended, and the financial highlights for each of the periods indicated therein. 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 audits. We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements and financial highlights are free of material misstatement. We were not engaged to perform an audit of the Fund's internal control over financial reporting. Our audits 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. Accord- ingly, we express no such opinion. An audit also includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial state- ments and financial highlights, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. Our procedures included confirmation of securities owned as of June 30, 2013, by correspondence with the custodian, brokers and agent banks or by other appropriate auditing procedures where replies from brokers and agent banks were not received. We believe that our audits provide a reasonable basis for our opinion. In our opinion, the financial statements and financial highlights referred to above present fairly, in all material respects, the financial position of Pioneer Bond Fund at June 30, 2013, the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period then ended, and the financial highlights for each of the periods indicated therein, in conformity with U.S. generally accepted accounting principles. Ernst & Young LLP Boston, Massachusetts August 22, 2013 96 Pioneer Bond Fund | Annual Report | 6/30/13 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 82.92%. Pioneer Bond Fund | Annual Report | 6/30/13 97 Trustees, Officers and Service Providers Investment Adviser Pioneer Investment Management, Inc. Custodian and Sub-Administrator Brown Brothers Harriman & Co. Independent Registered Public Accounting Firm Ernst & Young 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 52 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. 98 Pioneer Bond Fund | Annual Report | 6/30/13 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 (62) Trustee since 2006. Chairman and Chief Executive Officer, Director, Broadridge Financial Chairman of the Board Serves until a successor Quadriserv, Inc. (technology products Solutions, Inc. (investor and Trustee trustee is elected or for securities lending industry) communications and securities earlier retirement or (2008 - present); private investor processing provider for removal. (2004 - 2008); and Senior Executive financial services industry) Vice President, The Bank of New York (2009 - present); Director, (financial and securities services) Quadriserv, Inc. (2005 - (1986 - 2004) present); and Commissioner, New Jersey State Civil Service Commission (2011 - present) ------------------------------------------------------------------------------------------------------------------------------------ David R. Bock (69) Trustee since 2005. Managing Partner, Federal City Director of Enterprise Community Trustee Serves until a successor Capital Advisors (corporate advisory Investment, Inc. (privately held trustee is elected or services company) (1997 - 2004 and affordable housing finance earlier retirement or 2008 - present); Interim Chief company) (1985 - 2010); Director removal. Executive Officer, Oxford Analytica, of Oxford Analytica, Inc. Inc. (privately held research and (2008 - present); Director of consulting company) (2010); Executive The Swiss Helvetia Fund, Inc. Vice President and Chief Financial (closed-end fund) (2010 - Officer, I-trax, Inc. (publicly present); and Director of New traded health care services company) York Mortgage Trust (publicly (2004 - 2007); and Executive Vice traded mortgage REIT) (2004 - President and Chief Financial 2009, 2012 - present) Officer, Pedestal Inc. (internet-based mortgage trading company) (2000 - 2002) ------------------------------------------------------------------------------------------------------------------------------------ Pioneer Bond Fund | Annual Report | 6/30/13 99 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 ------------------------------------------------------------------------------------------------------------------------------------ Benjamin M. Friedman (68) Trustee since 2008. William Joseph Maier Professor of Trustee, Mellon Institutional Trustee Serves until a successor Political Economy, Harvard Funds Investment Trust and trustee is elected or University (1972 - present) Mellon Institutional Funds earlier Master Portfolio (oversaw 17 retirement or removal. portfolios in fund complex) (1989-2008) ------------------------------------------------------------------------------------------------------------------------------------ Margaret B.W. Graham (66) Trustee since 1996. Founding Director, Vice President None Trustee Serves until a successor and Corporate Secretary, The trustee is elected or Winthrop Group, Inc. (consulting earlier firm) (1982-present); Desautels retirement or removal. Faculty of Management, McGill 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 1996. President and Chief Executive Director of New America High Trustee Serves until a successor Officer, Newbury, Piret & Company, Income Fund, Inc. (closed-end trustee is elected or Inc. (investment banking firm) (1981 investment company) (2004 - earlier - present) present); and member, Board of retirement or removal. Governors, Investment Company Institute (2000 - 2006) ------------------------------------------------------------------------------------------------------------------------------------ Stephen K. West (84) Trustee since 2012. Senior Counsel, Sullivan & Cromwell Director, The Swiss Helvetia Trustee Serves until a successor LLP (law firm) (1998 - present); and Fund, Inc. (closed-end trustee is elected or Partner, Sullivan & Cromwell LLP investment company); and earlier (prior to 1998) Director, Invesco, Ltd. retirement or removal. (formerly AMVESCAP, PLC) (investment manager) (1997-2005) ------------------------------------------------------------------------------------------------------------------------------------ 100 Pioneer Bond Fund | Annual Report | 6/30/13 Interested Trustees ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Term of Office and Other Directorships Position held with the Fund Length of Service Principal Occupation Held by Trustee ------------------------------------------------------------------------------------------------------------------------------------ John F. Cogan, Jr. (87)* Trustee since 1996. Non-Executive Chairman and a director None Trustee, President and Serves until a successor of Pioneer Investment Management USA Chief Executive Officer trustee is elected or Inc. ("PIM-USA"); Chairman and a of the Fund earlier director of Pioneer; Chairman and retirement or removal. Director of Pioneer Institutional Asset Management, Inc. (since 2006); Director of Pioneer Alternative Investment Management Limited (Dublin) (until October 2011); President and a director of Pioneer Alternative Investment Management (Bermuda) Limited and affiliated funds; Deputy Chairman and a director of Pioneer Global Asset Management S.p.A. ("PGAM") (until April 2010); Director of PIOGLOBAL Real Estate Investment Fund (Russia) (until June 2006); Director of Nano-C, Inc. (since 2003); Director of Cole Management Inc. (2004 - 2011); Director of Fiduciary Counseling, Inc. (until December 2011); President and Director of Pioneer Funds Distributor, Inc. ("PFD") (until May 2006); President of all of the Pioneer Funds; and Retired Partner, Wilmer Cutler Pickering Hale and Dorr LLP ------------------------------------------------------------------------------------------------------------------------------------ Daniel K. Kingsbury (54)* Trustee since 2007. Director, CEO and President of None Trustee and Executive Serves until a successor PIM-USA (since February 2007); Vice President trustee is elected or Director and President of Pioneer and earlier Pioneer Institutional Asset retirement or removal. Management, Inc. (since February 2007); Executive Vice President of all of the Pioneer Funds (since March 2007); Director of PGAM (2007 - 2010); Head of New Europe Division, PGAM (2000 - 2005); and Head of New Markets Division, PGAM (2005 - 2007) ------------------------------------------------------------------------------------------------------------------------------------ * Mr. Cogan and Mr. Kingsbury are Interested Trustees because they are officers or directors of the Fund's investment adviser and certain of its affiliates. Pioneer Bond Fund | Annual Report | 6/30/13 101 Fund Officers ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Term of Office and Other Directorships Position held with the Fund Length of Service Principal Occupation Held by Officer ------------------------------------------------------------------------------------------------------------------------------------ Christopher J. Kelley (48) Since 2003. Serves at Vice President and Associate General None Secretary the discretion of the Counsel of Pioneer since January Board. 2008 and Secretary 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 (52) Since 2010. Serves at Fund Governance Director of Pioneer None Assistant Secretary the discretion of the since December 2006 and Assistant Board. 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 (50) Since 2010. Serves at Counsel of Pioneer since June 2007 None Assistant Secretary the discretion of the and Assistant Secretary of all the Board. Pioneer Funds since June 2010; and Vice President and Counsel at State Street Bank from October 2004 to June 2007 ------------------------------------------------------------------------------------------------------------------------------------ Mark E. Bradley (53) Since 2008. Serves at Vice President - Fund Treasury of None Treasurer and Chief the discretion of the Pioneer; Treasurer of all of the Financial and Accounting Board. Pioneer Funds since March 2008; Officer of the Fund Deputy Treasurer of Pioneer from March 2004 to February 2008; and Assistant Treasurer of all of the Pioneer Funds from March 2004 to February 2008 ------------------------------------------------------------------------------------------------------------------------------------ Luis I. Presutti (48) Since 2000. Serves at Assistant Vice President - Fund None Assistant Treasurer the discretion of the Treasury of Pioneer; and Assistant Board. Treasurer of all of the Pioneer Funds ------------------------------------------------------------------------------------------------------------------------------------ Gary Sullivan (54) Since 2002. Serves at Fund Accounting Manager - Fund None Assistant Treasurer the discretion of the Treasury of Pioneer; and Assistant Board. Treasurer of all of the Pioneer Funds ------------------------------------------------------------------------------------------------------------------------------------ David F. Johnson (33) Since 2009. Serves at Fund Administration Manager - Fund None Assistant Treasurer the discretion of the Treasury of Pioneer since November Board. 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 ------------------------------------------------------------------------------------------------------------------------------------ 102 Pioneer Bond Fund | Annual Report | 6/30/13 Interested Trustees ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Term of Office and Other Directorships Position held with the Fund Length of Service Principal Occupation Held by Officer ------------------------------------------------------------------------------------------------------------------------------------ Jean M. Bradley (60) Since 2010. Serves at Chief Compliance Officer of Pioneer None Chief Compliance Officer the discretion of the and of all the Pioneer Funds since Board. 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 ------------------------------------------------------------------------------------------------------------------------------------ Kelley O'Donnell (42) Since 2006. Serves at the Director--Transfer Agency Compliance None Anti-Money discretion of the Board. of Pioneer and Anti-Money Laundering Laundering Officer Officer of all the Pioneer Funds since 2006 ------------------------------------------------------------------------------------------------------------------------------------ Pioneer Bond Fund | Annual Report | 6/30/13 103 This page for your notes. 104 Pioneer Bond Fund | Annual Report | 6/30/13 This page for your notes. Pioneer Bond Fund | Annual Report | 6/30/13 105 This page for your notes. 106 Pioneer Bond Fund | Annual Report | 6/30/13 This page for your notes. Pioneer Bond Fund | Annual Report | 6/30/13 107 This page for your notes. 108 Pioneer Bond Fund | Annual Report | 6/30/13 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) 2013 Pioneer Investments 19398-07-0813 ITEM 2. CODE OF ETHICS. (a) Disclose whether, as of the end of the period covered by the report, the registrant has adopted a code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party. If the registrant has not adopted such a code of ethics, explain why it has not done so. The registrant has adopted, as of the end of the period covered by this report, a code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer and controller. (b) For purposes of this Item, the term "code of ethics" means written standards that are reasonably designed to deter wrongdoing and to promote: (1) Honest and ethical conduct, including the ethical handling of actual or apparent conflicts of interest between personal and professional relationships; (2) Full, fair, accurate, timely, and understandable disclosure in reports and documents that a registrant files with, or submits to, the Commission and in other public communications made by the registrant; (3) Compliance with applicable governmental laws, rules, and regulations; (4) The prompt internal reporting of violations of the code to an appropriate person or persons identified in the code; and (5) Accountability for adherence to the code. (c) The registrant must briefly describe the nature of any amendment, during the period covered by the report, to a provision of its code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party, and that relates to any element of the code of ethics definition enumerated in paragraph (b) of this Item. The registrant must file a copy of any such amendment as an exhibit pursuant to Item 10(a), unless the registrant has elected to satisfy paragraph (f) of this Item by posting its code of ethics on its website pursuant to paragraph (f)(2) of this Item, or by undertaking to provide its code of ethics to any person without charge, upon request, pursuant to paragraph (f)(3) of this Item. The registrant has made no amendments to the code of ethics during the period covered by this report. (d) If the registrant has, during the period covered by the report, granted a waiver, including an implicit waiver, from a provision of the code of ethics to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party, that relates to one or more of the items set forth in paragraph (b) of this Item, the registrant must briefly describe the nature of the waiver, the name of the person to whom the waiver was granted, and the date of the waiver. Not applicable. (e) If the registrant intends to satisfy the disclosure requirement under paragraph (c) or (d) of this Item regarding an amendment to, or a waiver from, a provision of its code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions and that relates to any element of the code of ethics definition enumerated in paragraph (b) of this Item by posting such information on its Internet website, disclose the registrant's Internet address and such intention. Not applicable. (f) The registrant must: (1) File with the Commission, pursuant to Item 10(a), a copy of its code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, as an exhibit to its annual report on this Form N-CSR (see attachment); (2) Post the text of such code of ethics on its Internet website and disclose, in its most recent report on this Form N-CSR, its Internet address and the fact that it has posted such code of ethics on its Internet website; or (3) Undertake in its most recent report on this Form N-CSR to provide to any person without charge, upon request, a copy of such code of ethics and explain the manner in which such request may be made. 	See Item 10(2) ITEM 3. AUDIT COMMITTEE FINANCIAL EXPERT. (a) (1) Disclose that the registrant's board of trustees has determined that the registrant either: (i) Has at least one audit committee financial expert serving on its audit committee; or (ii) Does not have an audit committee financial expert serving on its audit committee. The registrant's Board of Trustees has determined that the registrant has at least one audit committee financial expert. (2) If the registrant provides the disclosure required by paragraph (a)(1)(i) of this Item, it must disclose the name of the audit committee financial expert and whether that person is "independent." In order to be considered "independent" for purposes of this Item, a member of an audit committee may not, other than in his or her capacity as a member of the audit committee, the board of trustees, or any other board committee: (i) Accept directly or indirectly any consulting, advisory, or other compensatory fee from the issuer; or (ii) Be an "interested person" of the investment company as defined in Section 2(a)(19) of the Act (15 U.S.C. 80a-2(a)(19)). Ms. Marguerite A. Piret, an independent trustee, is such an audit committee financial expert. (3) If the registrant provides the disclosure required by paragraph (a)(1) (ii) of this Item, it must explain why it does not have an audit committee financial expert. Not applicable. ITEM 4. PRINCIPAL ACCOUNTANT FEES AND SERVICES. (a) Disclose, under the caption AUDIT FEES, the aggregate fees billed for each of the last two fiscal years for professional services rendered by the principal accountant for the audit of the registrant's annual financial statements or services that are normally provided by the accountant in connection with statutory and regulatory filings or engagements for those fiscal years. Audit Fees Fees for audit services provided to the Fund, including fees associated with the filings to update its Form N-2 and issuance of comfort letters, totaled approximately $42,076 in 2013 and $42,100 in 2012. (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. Audit-Related Fees Audit related fees for the Fund's audit related services totaled approximately $9,652 and $9,652 in 2013 and 2012, respectively. (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. Tax Fees Fees for tax compliance services, primarily for tax returns, totaled approximately $8,290 and $8,290 for 2013 and 2012, respectively. (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. Other Fees There were no other fees for 2013 and 2012. (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, 2013 and 2012, 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 accountant's engagement to audit the registrant's financial statements for the most recent fiscal year that were attributed to work performed by persons other than the principal accountant's full-time, permanent employees. N/A (g) Disclose the aggregate non-audit fees billed by the registrant's accountant for services rendered to the registrant, and rendered to the registrant's investment adviser (not including any sub-adviser whose role is primarily portfolio management and is subcontracted with or overseen by another investment adviser), and any entity controlling, controlled by, or under common control with the adviser that provides ongoing services to the registrant for each of the last two fiscal years of the registrant. The aggregate non-audit fees for the Fund and affiliates, as previously defined, totaled approximately $17,942 in 2013 and $17,942 in 2012. (h) Disclose whether the registrant's audit committee of the board of trustees has considered whether the provision of non-audit services that were rendered to the registrant's investment adviser (not including any subadviser whose role is primarily portfolio management and is subcontracted with or overseen by another investment adviser), and any entity controlling, controlled by, or under common control with the investment adviser that provides ongoing services to the registrant that were not pre-approved pursuant to paragraph (c)(7)(ii) of Rule 2-01 of Regulation S-X is compatible with maintaining the principal accountant's independence. The Fund's audit committee of the Board of Trustees has considered whether the provision of non-audit services that were rendered to the Affiliates (as defined) that were not pre- approved pursuant to paragraph (c)(7)(ii) of Rule 2-01 of Regulation S-X is compatible with maintaining the principal accountant's independence. Item 5. Audit Committee of Listed Registrants (a) If the registrant is a listed issuer as defined in Rule 10A-3 under the Exchange Act (17 CFR 240.10A-3), state whether or not the registrant has a separately-designated standing audit committee established in accordance with Section 3(a)(58)(A) of the Exchange Act (15 U.S.C. 78c(a)(58)(A)). If the registrant has such a committee, however designated, identify each committee member. If the entire board of directors is acting as the registrants audit committee as specified in Section 3(a)(58)(B) of the Exchange Act (15 U.S.C. 78c(a)(58)(B)), so state. N/A (b) If applicable, provide the disclosure required by Rule 10A-3(d) under the Exchange Act (17 CFR 240.10A-3(d)) regarding an exemption from the listing standards for audit committees. N/A Item 6. Schedule of Investments. File Schedule I Investments in securities of unaffiliated issuers as of the close of the reporting period as set forth in 210.12- 12 of Regulation S-X [17 CFR 210.12-12], unless the schedule is included as part of the report to shareholders filed under Item 1 of this Form. Included in Item 1 ITEM 7. DISCLOSURE OF PROXY VOTING POLICIES AND PROCEDURES FOR CLOSED-END MANAGEMENT INVESTMENT COMPANIES. A closed-end management investment company that is filing an annual report on this Form N-CSR must, unless it invests exclusively in non-voting securities, describe the policies and procedures that it uses to determine how to vote proxies relating to portfolio securities, including the procedures that the company uses when a vote presents a conflict between the interests of its shareholders, on the one hand, and those of the company's investment adviser; principal underwriter; or any affiliated person (as defined in Section 2(a)(3) of the Investment Company Act of 1940 (15 U.S.C. 80a-2(a)(3)) and the rules thereunder) of the company, its investment adviser, or its principal underwriter, on the other. Include any policies and procedures of the company's investment adviser, or any other third party, that the company uses, or that are used on the company's behalf, to determine how to vote proxies relating to portfolio securities. Not applicable to open-end management investment companies. Item 8. Portfolio Managers of Closed-End Management Investment Companies. (a) If the registrant is a closed-end management investment company that is filing an annual report on this Form N-CSR,provide the following information: (1) State the name, title, and length of service of the person or persons employed by or associated with the registrant or an investment adviser of the registrant who are primarily responsible for the day-to-day management of the registrants portfolio (Portfolio Manager). Also state each Portfolio Managers business experience during the past 5 years. Not applicable to open-end management investment companies. Item 9. Purchases of Equity Securities by Closed-End Management Investment Company and Affiliated Purchasers. (a) If the registrant is a closed-end management investment company, in the following tabular format, provide the information specified in paragraph (b) of this Item with respect to any purchase made by or on behalf of the registrant or any affiliated purchaser, as defined in Rule 10b-18(a)(3) under the Exchange Act (17 CFR 240.10b-18(a)(3)), of shares or other units of any class of the registrants equity securities that is registered by the registrant pursuant to Section 12 of the Exchange Act (15 U.S.C. 781). Instruction to paragraph (a). Disclose all purchases covered by this Item, including purchases that do not satisfy the conditions of the safe harbor of Rule 10b-18 under the Exchange Act (17 CFR 240.10b-18), made in the period covered by the report. Provide disclosures covering repurchases made on a monthly basis. For example, if the reporting period began on January 16 and ended on July 15, the chart would show repurchases for the months from January 16 through February 15, February 16 through March 15, March 16 through April 15, April 16 through May 15, May 16 through June 15, and June 16 through July 15. Not applicable to open-end management investment companies. Item 10. Submission of Matters to a Vote of Security Holders. Describe any material changes to the procedures by which shareholders may recommend nominees to the registrants board of directors, where those changes were implemented after the registrant last provided disclosure in response to the requirements of Item 7(d)(2)(ii)(G) of Schedule 14A (17 CFR 240.14a-101), or this Item. There have been no material changes to the procedures by which the shareholders may recommend nominees to the registrants board of directors since the registrant last provided disclosure in response to the requirements of Item 7(d)(2)(ii)(G) of Schedule 14(A) in its definitive proxy statement, or this Item. ITEM 11. CONTROLS AND PROCEDURES. (a) Disclose the conclusions of the registrant's principal executive officer or officers and principal financial officer or officers, or persons performing similar functions, about the effectiveness of the registrant's disclosure controls and procedures (as defined in Rule 30a-2(c) under the Act (17 CFR 270.30a-2(c))) based on their evaluation of these controls and procedures as of a date within 90 days of the filing date of the report that includes the disclosure required by this paragraph. The registrant's principal executive officer and principal financial officer have concluded that the registrant's disclosure controls and procedures are effective based on their evaluation of these controls and procedures as of a date within 90 days of the filing date of this report. (b) Disclose whether or not there were significant changes in the registrant's internal controls or in other factors that could significantly affect these controls subsequent to the date of their evaluation, including any corrective actions with regard to significant deficiencies and material weaknesses. There were no significant changes in the registrant's internal control over financial reporting that occurred during the second fiscal quarter of the period covered by this report that have materially affected, or are reasonably likely to materially affect, the registrant's internal control over financial reporting. The registrant's principal executive officer and principal financial officer, however, voluntarily are reporting the following information: In August of 2006 the registrant's investment adviser enhanced its internal procedures for reporting performance information required to be included in prospectuses. Those enhancements involved additional internal controls over the appropriateness of performance data generated for this purpose. Such enhancements were made following an internal review which identified prospectuses relating to certain classes of shares of a limited number of registrants where, inadvertently, performance information not reflecting the deduction of applicable sales charges was included. Those prospectuses were revised, and the revised prospectuses were distributed to shareholders. ITEM 12. EXHIBITS. File the exhibits listed below as part of this Form. Letter or number the exhibits in the sequence indicated. (a) Any code of ethics, or amendment thereto, that is the subject of the disclosure required by Item 2, to the extent that the registrant intends to satisfy the Item 2 requirements through filing of an exhibit. (b) A separate certification for each principal executive officer and principal financial officer of the registrant as required by Rule 30a-2 under the Act (17 CFR 270.30a-2). Filed herewith. SIGNATURES [See General Instruction F] Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. (Registrant) Pioneer Bond Fund By (Signature and Title)* /s/ John F. Cogan, Jr. John F. Cogan, Jr, President Date August 29, 2013 Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. By (Signature and Title)* /s/ John F. Cogan, Jr. John F. Cogan, Jr., President Date August 29, 2013 By (Signature and Title)* /s/ Mark Bradley Mark Bradley, Treasurer & Chief Accounting & Financial Officer Date August 29, 2013 * Print the name and title of each signing officer under his or her signature.