OMB APPROVAL OMB Number: 3235-0570 Expires: August 31, 2010 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, 2009 through June 30, 2010 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, 2010 - -------------------------------------------------------------------------------- Ticker Symbols: Class A PIOBX Class B PBOBX Class C PCYBX Class R PBFRX Class Y PICYX Class Z PIBZX [LOGO] PIONEER Investments(R) visit us: pioneerinvestments.com Table of Contents Letter to Shareowners 2 Portfolio Management Discussion 4 Portfolio Summary 8 Prices and Distributions 9 Performance Update 10 Comparing Ongoing Fund Expenses 16 Schedule of Investments 18 Financial Statements 52 Notes to Financial Statements 62 Report of Independent Registered Public Accounting Firm 71 Trustees, Officers and Service Providers 73 Pioneer Bond Fund | Annual Report | 6/30/10 1 President's Letter Dear Shareowner, Stock and bond markets around the globe have begun to recover over the past year from one of their most tumultuous periods in history. This is a welcome relief, and we are generally optimistic about the prospects for the economy going forward. Still, challenges remain. Unemployment is high; consumer demand and loan growth are weak; and housing has not returned to normal. At Pioneer, we have long advocated the benefits of investing for the long term. This strategy has generally performed well for many investors. Those who remained invested in the market during the downturn have most likely seen their portfolios start to recover over the past year, as the Dow Jones Industrial Average climbed back from the depressed levels we saw in early 2009. Many bond investors have similarly seen a strong rebound, with a broad-based recovery occurring across many different fixed-income asset classes. The riskiest asset classes, such as high-yield bonds, outperformed other fixed-income asset classes during most of 2009. At Pioneer, we are not changing the approach to investing that we have used for more than 80 years. We remain focused on company fundamentals and risk management. Our investment process is based on careful research into individual companies, quantitative analysis, and active portfolio management. This three-pillared process, which we apply to each of our portfolios, is supported by an integrated team approach and is designed to carefully balance risk and reward. While we see potential opportunities for making money in many corners of the markets around the globe, it takes research and experience to separate solid investment opportunities from speculation. Following this difficult period, many investors are rethinking their approach to investing and risk management. Some are questioning whether the basic investment principles they were taught in the past are still useful in today's markets. Complicating matters is that financial markets remain unpredictable. Our advice, as always, is to work closely with a trusted financial advisor to discuss your goals and work together to develop an investment strategy that meets your individual needs. There is no single best strategy that works for every investor. 2 Pioneer Bond Fund | Annual Report | 6/30/10 We invite you to learn more about Pioneer and our time-tested approach to investing by consulting with your financial advisor or visiting us online at www.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 the opinion of Fund management 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 | 6/30/10 3 Portfolio Management Discussion | 6/30/10 The domestic fixed-income market delivered solid, positive returns for the 12 months ended June 30, 2010, led by the strong performance of corporate securities, which rebounded from the distressed price levels to which they had fallen in late 2008 and early 2009. In the following interview, Kenneth J. Taubes discusses the factors that influenced the performance of Pioneer Bond Fund during the 12-month period. Mr. Taubes, Executive Vice President and Chief Investment Officer at Pioneer Investments, is responsible for the daily management of the Fund. Q How did the Fund perform during the 12 months ended June 30, 2010? A Pioneer Bond Fund Class A shares generated a total return of 14.71% at net asset level over the 12 months ended June 30, 2010, compared with a return of 9.50% for the Fund's benchmark, the Barclays Capital Aggregate Bond Index (the Barclays Index). Over the same period, the average return of the 134 funds in Lipper's Corporate Debt, A-rated category, was 13.45%. On June 30, 2010, at the end of the fiscal year, the Fund's 30-day SEC yield on Class A shares was 4.51%. Q What were the principal factors affecting the Fund's strong relative performance during the 12 months ended June 30, 2010? A Corporate bonds and non-government asset-backed securities produced strong gains over the full 12 months ended June 30, 2010, even after underperforming late in the period when new concerns arose about the strength of the economic recovery. Low-yielding Treasuries and government agency securities lagged the performance of higher-credit-risk bonds offering greater yield, as for most of the period investors anticipated that a strengthening economy would boost corporate profits. The Fund's strong performance relative to the benchmark Barclays Index was the result of underweight positions in Treasury and government agency securities and a greater emphasis on corporate bonds and non-agency mortgage-backed securities, most of which rose in value as the yield spreads between corporate debt and government debt tightened. In addition, the Fund benefited from very good security selection in its corporate debt and non-agency holdings. The Fund's yield-curve positioning also supported results, as a heavy weighting in intermediate-term securities paid off when the yield curve steepened and yields of longer-term securities declined less than those of intermediate-term debt. The Fund's results were achieved during a period when investors' worst fears about an economic collapse receded and bond prices reflected a spreading belief that the economy would enjoy modest growth. The Federal 4 Pioneer Bond Fund | Annual Report | 6/30/10 Reserve Board (the Fed) kept short-term lending rates at near historically low levels, which resulted in very low yields offered by investments such as money market funds, bank deposit accounts and certificates of deposit. Those low-yielding alternatives encouraged investors to seek out alternatives offering more current income, such as corporate bonds, which were positioned to benefit from a recovering economy. Q How was the Fund positioned over the 12 months ended June 30, 2010? A In light of our view that the economy would recover and business conditions would improve, we overweighted the Fund to corporate debt and non-agency mortgage-backed securities. We thought Treasuries and government agency debt were priced relatively expensively and so we de-emphasized them. At the end of the fiscal year, on June 30, 2010, approximately 35% of Fund assets were invested in investment-grade debt with BBB or A ratings, and 16.3% of assets were invested in high-yield, lower-rated corporate debt. While 39% of total Fund assets were invested in pass-through securities, such as mortgage-backed debt, much of that was allocated to non-agency mortgages and asset-backed securities. At June 30, 2010, the portfolio's effective duration, which is a measure of price sensitivity to interest-rate changes, was 4.09 years. Q What individual investments most affected the Fund's performance during the 12 months ended June 30, 2010? A Security selection had a very positive impact on overall performance during the period, especially in some of the Fund's investments in the debt of companies that were able to strengthen their financial balance sheets and lower their overall indebtedness. The Fund's investment in securities issued by Forest City Enterprises, a corporation engaged in commercial and residential real estate, gained in value as the economy improved and the company was able to stabilize its capital structure. The asset-backed securities of the Domino's Pizza chain also appreciated as the corporation bought back and retired some of its existing debt. In addition, securities issued by Lear, an automotive component manufacturer, bounced back in value as the automobile industry rebounded at the same time the company succeeded in restructuring its finances. Nevertheless, the Fund did have some holdings that produced disappointing results. An investment in securities backed by Local Insight Regatta Holdings, which produces the yellow pages in phone directories, declined in value as investors worried that the yellow-page business was losing market share to internet-based media. In addition, the debt of commercial real estate lender CIT performed poorly over the 12-month period, despite recovering somewhat late in the Fund's fiscal year. Pioneer Bond Fund | Annual Report | 6/30/10 5 Q What is your investment outlook? A We are cautious. As we look ahead to the second half of 2010, short-term interest rates remain about as low as they can be expected to go, with overnight lending rates approaching zero and the 5-year Treasury yielding just 1.8%.We believe Treasury securities offer very little investment value, even in a period of positive economic growth. Nevertheless, investors remain apprehensive about the direction of the economy and Treasuries do have some appeal to those concerned primarily about preserving value. We continue to overweight the Fund to corporate bonds, especially as the economy appears to continue to expand, even though the pace of the recovery may be slowing. To be sure, we are watching economic trends very carefully. Investors remain worried about the predictability of corporate earnings and only small gains in the overall employment picture appear to have discouraged expectations of a robust economic revival in the near term. Moreover, there also is some uncertainty about the effects of tighter financial regulations and the risk that higher Federal income taxes could raise the cost of doing business, which would likely take money out of the economy. In addition, investors also are uncertain about the potential fall-outs from the debt crisis in Europe. On the positive side, there are many reasons to retain confidence in the corporate bond sector. Corporations, in general, have been managing their finances very prudently and keeping their overall debt levels under control, encouraging expectations that they will be able to meet their obligations, particularly in an expanding economy. We expect to continue to emphasize corporate debt, although we are watching conditions carefully and continuing to pay very close attention to individual security selection. Please refer to the Schedule of Investments on pages 18-51 for a full listing of Fund securities. When interest rates rise, the prices of fixed-income securities in the Fund will generally fall. Conversely, when interest rates fall, the prices of fixed-income securities in the Fund will generally rise. Investments in the Fund are subject to possible loss due to the financial failure of issuers of 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 6 Pioneer Bond Fund | Annual Report | 6/30/10 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 it more susceptible to any economic, political, or regulatory developments or other risks affecting those industries and sectors. 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 the opinion of Fund management as of the date of this report. These opinions should not be relied upon for any other purposes. Pioneer Bond Fund | Annual Report | 6/30/10 7 Portfolio Summary | 6/30/10 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 38.2% U.S. Government Securities 22.9% Collateralized Mortgage Obligations 17.4% Senior Secured Loans 7.5% Asset Backed Securities 5.7% Temporary Cash Investments 5.1% Preferred Stocks 1.4% Municipal Bonds 1.0% Convertible Corporate Bonds 0.6% U.S. Common Stocks 0.1% Foreign Government Bonds 0.1% Portfolio Quality - -------------------------------------------------------------------------------- (As a percentage of total investment portfolio) [THE FOLLOWING DATA WAS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL] A 11.9% AA 3.5% AAA 1.7% BBB 23.0% BB 9.8% B & Lower 6.5% Commercial Paper 1.9% Treasury/Agency 41.7% 10 Largest Holdings - -------------------------------------------------------------------------------- (As a percentage of total long-term holdings)* 1. Federal National Mortgage Association, 5.0%, 7/1/39 2.15% - -------------------------------------------------------------------------------- 2. U.S. Treasury Bonds, 2.75%, 2/15/19 1.82 - -------------------------------------------------------------------------------- 3. U.S. Treasury Notes, 4.625%, 2/15/40 1.01 - -------------------------------------------------------------------------------- 4. U.S. Treasury Notes, 4.5%, 8/15/39 0.81 - -------------------------------------------------------------------------------- 5. U.S. Treasury Notes, 4.5%, 5/15/38 0.76 - -------------------------------------------------------------------------------- 6. Wachovia Bank Commercial Mortgage Trust, 4.368%, 8/15/41 0.73 - -------------------------------------------------------------------------------- 7. Goldman Sachs Capital, Floating Rate Note, 12/29/49 0.68 - -------------------------------------------------------------------------------- 8. U.S. Treasury Notes, 4.5%, 2/15/36 0.66 - -------------------------------------------------------------------------------- 9. U.S. Treasury Notes, 4.25%, 5/15/39 0.66 - -------------------------------------------------------------------------------- 10. Forest City Enterprises, Inc., 7.0%, 12/31/49 0.61 - -------------------------------------------------------------------------------- * This list excludes temporary cash investments and derivative instruments. The Fund is actively managed, and current holdings may be different. The holdings listed should not be considered recommendations to buy or sell any security listed. 8 Pioneer Bond Fund | Annual Report | 6/30/10 Prices and Distributions | 6/30/10 Net Asset Value per Share - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Class 6/30/10 6/30/09 - -------------------------------------------------------------------------------- A $ 9.44 $ 8.63 - -------------------------------------------------------------------------------- B $ 9.38 $ 8.58 - -------------------------------------------------------------------------------- C $ 9.34 $ 8.54 - -------------------------------------------------------------------------------- R $ 9.52 $ 8.71 - -------------------------------------------------------------------------------- Y $ 9.36 $ 8.55 - -------------------------------------------------------------------------------- Z $ 9.46 $ 8.67 - -------------------------------------------------------------------------------- Distributions per Share: 7/1/09-6/30/10 - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Net Investment Short-Term Long-Term Class Income Capital Gains Capital Gains - -------------------------------------------------------------------------------- A $ 0.4374 $ -- $ -- - -------------------------------------------------------------------------------- B $ 0.3398 $ -- $ -- - -------------------------------------------------------------------------------- C $ 0.3479 $ -- $ -- - -------------------------------------------------------------------------------- R $ 0.4051 $ -- $ -- - -------------------------------------------------------------------------------- Y $ 0.4542 $ -- $ -- - -------------------------------------------------------------------------------- Z $ 0.4596 $ -- $ -- - -------------------------------------------------------------------------------- Pioneer Bond Fund | Annual Report | 6/30/10 9 Performance Update | 6/30/10 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 Capital Aggregate Bond Index. Average Annual Total Returns (As of June 30, 2010) - -------------------------------------------------------------------------------- Net Asset Public Offering Period Value (NAV) Price (POP) - -------------------------------------------------------------------------------- 10 Years 6.74% 6.25% 5 Years 5.48 4.52 1 Year 14.71 9.51 - -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated November 1, 2009) - -------------------------------------------------------------------------------- Gross Net - -------------------------------------------------------------------------------- 1.09% 0.85% - -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MTN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Barclays Pioneer Capital Aggregate Bond Fund Bond Index --------- ---------- 6/00 9550 10000 10571 11123 6/02 11369 12082 12663 13339 6/04 13040 13382 14038 14292 6/06 13863 14177 14599 15044 6/08 15568 16116 15980 17091 6/10 18330 18714 Call 1-800-225-6292 or visit www.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, 2013, 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. The Barclays Capital Aggregate Bond Index is a 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. You cannot invest directly in an index. 10 Pioneer Bond Fund | Annual Report | 6/30/10 Performance Update | 6/30/10 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 Capital Aggregate Bond Index. Average Annual Total Returns (As of June 30, 2010) - -------------------------------------------------------------------------------- If If Period Held Redeemed - -------------------------------------------------------------------------------- 10 Years 5.77% 5.77% 5 Years 4.45 4.45 1 Year 13.47 9.47 - -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated November 1, 2009) - -------------------------------------------------------------------------------- Gross Net - -------------------------------------------------------------------------------- 1.99% 1.90% - -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MTN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Barclays Pioneer Capital Aggregate Bond Fund Bond Index --------- ---------- 6/00 10000 10000 10971 11123 6/02 11715 12082 12938 13339 6/04 13202 13382 14089 14292 6/06 13787 14177 14375 15044 6/08 15194 16116 15440 17091 6/10 17519 18714 Call 1-800-225-6292 or visit www.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). Effective December 1, 2004, the period during which a CDSC is applied to withdrawals was shortened to 5 years. The maximum CDSC for Class B shares continues to be 4%. For more complete information, please see the prospectus. Note: Shares purchased prior to December 1, 2004, remain subject to the CDSC in effect at the time you purchased those shares. For performance information for shares purchased prior to December 1, 2004, please visit www.pioneerinvestments.com. 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, 2011, 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. The Barclays Capital Aggregate Bond Index is a 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. You cannot invest directly in an index. Pioneer Bond Fund | Annual Report | 6/30/10 11 Performance Update | 6/30/10 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 Capital Aggregate Bond Index. Average Annual Total Returns (As of June 30, 2010) - -------------------------------------------------------------------------------- If If Period Held Redeemed - -------------------------------------------------------------------------------- 10 Years 5.75% 5.75% 5 Years 4.54 4.54 1 Year 13.63 13.63 - -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated November 1, 2009) - -------------------------------------------------------------------------------- Gross Net - -------------------------------------------------------------------------------- 1.83% 1.83% - -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MTN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Barclays Pioneer Capital Aggregate Bond Fund Bond Index --------- ---------- 6/00 10000 10000 10946 11123 6/02 11662 12082 12860 13339 6/04 13132 13382 14009 14292 6/06 13717 14177 14320 15044 6/08 15149 16116 15395 17091 6/10 17493 18714 Call 1-800-225-6292 or visit www.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 net expense ratio reflects contractual expense limitations currently in effect through November 1, 2011, for Class C shares. There can be no assurance that Pioneer will extend the expense limitations beyond such time. Please see the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. The Barclays Capital Aggregate Bond Index is a 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. You cannot invest directly in an index. 12 Pioneer Bond Fund | Annual Report | 6/30/10 Performance Update | 6/30/10 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 Capital Aggregate Bond Index. Average Annual Total Returns (As of June 30, 2010) - -------------------------------------------------------------------------------- If If Period Held Redeemed - -------------------------------------------------------------------------------- 10 Years 6.40% 6.40% 5 Years 5.13 5.13 1 Year 14.18 14.18 - -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated November 1, 2009) - -------------------------------------------------------------------------------- Gross Net - -------------------------------------------------------------------------------- 1.30% 1.25% - -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MTN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Barclays Pioneer Capital Aggregate Bond Fund Bond Index --------- ---------- 6/00 10000 10000 11015 11123 6/02 11788 12082 13084 13339 6/04 13502 13382 14483 14292 6/06 14276 14177 14996 15044 6/08 15919 16116 16293 17091 6/10 18603 18714 Call 1-800-225-6292 or visit www.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. The performance shown for Class R shares for the period prior to the commencement of operations of Class R shares on April 1, 2003, is based on the performance of Class A shares, reduced to reflect the higher distribution and service fees of Class R shares. For the period after April 1, 2003, the actual performance of Class R shares is reflected. The performance shown for Class R shares does not reflect the 1% CDSC that was in effect prior to July 1, 2004. 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, 2011, 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. The Barclays Capital Aggregate Bond Index is a 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. You cannot invest directly in an index. Pioneer Bond Fund | Annual Report | 6/30/10 13 Performance Update | 6/30/10 Class Y 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 Capital Aggregate Bond Index. Average Annual Total Returns (As of June 30, 2010) - -------------------------------------------------------------------------------- If If Period Held Redeemed - -------------------------------------------------------------------------------- 10 Years 7.09% 7.09% 5 Years 5.83 5.83 1 Year 15.06 15.06 - -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated November 1, 2009) - -------------------------------------------------------------------------------- Gross Net - -------------------------------------------------------------------------------- 0.64% 0.64% - -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MTN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Barclays Pioneer Capital Aggregate Bond Fund Bond Index --------- ---------- 6/00 10000 10000 11070 11123 6/02 11945 12082 13363 13339 6/04 13827 13382 14943 14292 6/06 14827 14177 15665 15044 6/08 16748 16116 17242 17091 6/10 19839 18714 Call 1-800-225-6292 or visit www.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Performance shown for periods prior to the inception of the Fund's Class Y shares on September 20, 2001, 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 Y shares, the performance for Class Y shares prior to their inception would have been higher than that shown. Class Y shares are not subject to sales charges and are available for limited groups of eligible investors, including institutional investors. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The net expense ratio reflects contractual expense limitations currently in effect through June 1, 2012, for Class Y shares. There can be no assurance that Pioneer will extend the expense limitations beyond such time. Please see the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. The Barclays Capital Aggregate Bond Index is a 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. You cannot invest directly in an index. 14 Pioneer Bond Fund | Annual Report | 6/30/10 Performance Update | 6/30/10 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 Capital Aggregate Bond Index. Average Annual Total Returns (As of June 30, 2010) - -------------------------------------------------------------------------------- If If Period Held Redeemed - -------------------------------------------------------------------------------- 10 Years 6.74% 6.74% 5 Years 5.49 5.49 1 Year 14.68 14.68 - -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated November 1, 2009) - -------------------------------------------------------------------------------- Gross Net - -------------------------------------------------------------------------------- 0.67% 0.65% - -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MTN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Barclays Pioneer Capital Aggregate Bond Fund Bond Index --------- ---------- 6/00 10000 10000 11070 11123 6/02 11906 12082 13261 13339 6/04 13656 13382 14701 14292 6/06 14517 14177 15137 15044 6/08 16194 16116 16748 17091 6/10 19206 18714 Call 1-800-225-6292 or visit www.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, 2013, 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. The Barclays Capital Aggregate Bond Index is a 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. You cannot invest directly in an index. Pioneer Bond Fund | Annual Report | 6/30/10 15 Comparing Ongoing Fund Expenses As a shareowner in the Fund, you incur two types of costs: (1) ongoing costs, including management fees, distribution and/or service (12b-1) fees, and other Fund expenses; and (2) transaction costs, including sales charges (loads) on purchase payments. This example is intended to help you understand your ongoing expenses (in dollars) of investing in the Fund and to compare these costs with the ongoing costs of investing in other mutual funds. The example is based on an investment of $1,000 at the beginning of the Fund's latest six-month period and held throughout the six months. Using the Tables - -------------------------------------------------------------------------------- Actual Expenses The first table below provides information about actual account values and actual expenses. You may use the information in this table, together with the amount you invested, to estimate the expenses that you paid over the period as follows: (1) Divide your account value by $1,000 Example: an $8,600 account value [divided by] $1,000 = 8.6 (2) Multiply the result in (1) above by the corresponding share class's number in the third row under the heading entitled "Expenses Paid During Period" to estimate the expenses you paid on your account during this period. Expenses Paid on a $1,000 Investment in Pioneer Bond Fund Based on actual returns from January 1, 2010 through June 30, 2010. - --------------------------------------------------------------------------------------------------------------------- Share Class A B C R Y Z - --------------------------------------------------------------------------------------------------------------------- Beginning Account $1,000.00 $1,000.00 $1,000.00 $1,000.00 $1,000.00 $1,000.00 Value on 1/1/10 - --------------------------------------------------------------------------------------------------------------------- Ending Account Value $1,147.10 $1,134.70 $1,136.30 $1,141.80 $1,150.60 $1,146.80 (after expenses) on 6/30/10 - --------------------------------------------------------------------------------------------------------------------- Expenses Paid $4.34 $9.66 $9.11 $6.37 $3.11 $3.21 During Period* - --------------------------------------------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized expense ratio of 0.85%, 1.90%, 1.79%, 1.25%, 0.61%, and 0.63% for Class A, Class B, Class C, 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). 16 Pioneer Bond Fund | Annual Report | 6/30/10 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, 2010 through June 30, 2010. - --------------------------------------------------------------------------------------------------------------------------- Share Class A B C R Y Z - --------------------------------------------------------------------------------------------------------------------------- Beginning Account $1,000.00 $1,000.00 $1,000.00 $1,000.00 $1,000.00 $1,000.00 Value on 1/1/10 - --------------------------------------------------------------------------------------------------------------------------- Ending Account Value $1,020.58 $1,015.37 $1,015.92 $1,018.60 $1,021.77 $1,021.67 (after expenses) on 6/30/10 - --------------------------------------------------------------------------------------------------------------------------- Expenses Paid $4.26 $9.49 $8.95 $6.26 $3.06 $3.16 During Period* - --------------------------------------------------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized expense ratio of 0.85%, 1.90%, 1.79%, 1.25%, 0.61%, and 0.63% for Class A, Class B, Class C, Class R, Class Y, and Class Z shares, respectively, multiplied by the average account value over the period, multiplied by 181/365 (to reflect the one-half year period). Pioneer Bond Fund | Annual Report | 6/30/10 17 Schedule of Investments | 6/30/10 - ------------------------------------------------------------------------------------------------------ Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value - ------------------------------------------------------------------------------------------------------ CONVERTIBLE CORPORATE BONDS -- 0.6% ENERGY -- 0.3% Coal & Consumable Fuels -- 0.2% 2,680,000 BB-/NR Massey Energy Co., 3.25%, 8/1/15 $ 2,227,750 - ------------------------------------------------------------------------------------------------------ Oil & Gas Drilling -- 0.1% 1,275,000 BBB+/Baa2 Transocean Sedco, 1.625%, 12/15/37 (b) $ 1,235,156 -------------- Total Energy $ 3,462,906 - ------------------------------------------------------------------------------------------------------ HEALTH CARE EQUIPMENT & SERVICES -- 0.2% Health Care Services -- 0.2% 2,570,000 B+/B1 Omnicare, Inc., 3.25%, 12/15/35 $ 2,126,675 -------------- Total Health Care Equipment & Services $ 2,126,675 - ------------------------------------------------------------------------------------------------------ BANKS -- 0.1% Regional Banks -- 0.1% 2,100,000 A/A3 National City Corp., 4.0%, 2/1/11 $ 2,115,750 -------------- Total Banks $ 2,115,750 - ------------------------------------------------------------------------------------------------------ TOTAL CONVERTIBLE CORPORATE BONDS (Cost $6,424,198) $ 7,705,331 - ------------------------------------------------------------------------------------------------------ Shares - ------------------------------------------------------------------------------------------------------ PREFERRED STOCKS -- 1.3% BANKS -- 0.2% Diversified Banks -- 0.2% 4,000 7.19 U.S. Bancorp, Floating Rate Note, 12/31/99 (Perpetual)* $ 2,932,750 -------------- Total Banks $ 2,932,750 - ------------------------------------------------------------------------------------------------------ DIVERSIFIED FINANCIALS -- 0.3% Diversified Financial Services -- 0.3% 4,600 Bank of America Corp., 7.25%, 12/31/49 $ 4,176,800 -------------- Total Diversified Financials $ 4,176,800 - ------------------------------------------------------------------------------------------------------ INSURANCE -- 0.2% Life & Health Insurance -- 0.2% 153,800 Delphi Financial Group, 7.376%, 5/15/37 $ 3,037,550 -------------- Total Insurance $ 3,037,550 - ------------------------------------------------------------------------------------------------------ REAL ESTATE -- 0.6% Real Estate Operating Companies -- 0.6% 150,400 Forest City Enterprises, Inc., 7.0%, 12/31/49* $ 7,510,600 -------------- Total Real Estate $ 7,510,600 - ------------------------------------------------------------------------------------------------------ TOTAL PREFERRED STOCKS (Cost $17,876,850) $ 17,657,700 - ------------------------------------------------------------------------------------------------------ The accompanying notes are an integral part of these financial statements. 18 Pioneer Bond Fund | Annual Report | 6/30/10 - ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Rate (d) Ratings Shares (unaudited) (unaudited) Value - ---------------------------------------------------------------------------------------------------- COMMON STOCKS -- 0.1% AUTOMOBILES & COMPONENTS -- 0.1% Auto Parts & Equipment -- 0.1% 19,050 Lear Corp.* $ 1,261,110 -------------- Total Automobiles & Components $ 1,261,110 - ---------------------------------------------------------------------------------------------------- TOTAL COMMON STOCKS (Cost $765,117) $ 1,261,110 - ---------------------------------------------------------------------------------------------------- Principal Amount ($) - ---------------------------------------------------------------------------------------------------- ASSET BACKED SECURITIES -- 5.9% MATERIALS -- 0.1% Steel -- 0.1% 1,488,737 0.55 AAA/Aaa Ameriquest Mortgage Securities, Floating Rate Note, 5/25/35 $ 1,449,647 -------------- Total Materials $ 1,449,647 - ---------------------------------------------------------------------------------------------------- CONSUMER SERVICES -- 1.2% Restaurants -- 1.2% 2,895,000 BBB-/Baa3 Dominos Pizza Master Issuer LLC, 5.261%, 4/25/37 $ 2,674,863 5,325,000 BB/Aaa Dominos Pizza Master Issuer LLC, 7.629%, 4/25/37 4,661,401 3,100,000 BB+/Baa3 Dunkin Brands Master Finance LLC, 5.779%, 6/20/31 3,020,454 4,535,000 BB-/Ba3 Dunkin Brands Master Finance LLC, 8.28%, 6/20/31 (144A) 4,151,793 -------------- $ 14,508,511 -------------- Total Consumer Services $ 14,508,511 - ---------------------------------------------------------------------------------------------------- BANKS -- 3.3% Diversified Banks -- 0.1% 1,722,625 0.44 AAA/Aa1 Wells Fargo Home Equity, Floating Rate Note, 4/25/37 $ 1,650,957 - ---------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- 3.2% 737,339 0.40 AAA/Baa1 Carrington Mortgage Loan Trust, Floating Rate Note, 1/25/37 $ 701,315 2,150,000 0.33 A/B3 Carrington Mortgage Loan Trust, Floating Rate Note, 10/25/36 1,660,277 476,130 0.84 AA/Aa1 Carrington Mortgage Loan Trust, Floating Rate Note, 2/25/35 470,278 592,800 0.75 AAA/Baa3 Carrington Mortgage Loan Trust, Floating Rate Note, 9/25/35 520,486 1,133,200 5.94 AAA/B1 Citicorp Residential Mortgage, Floating Rate Note, 7/25/36 1,061,677 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/10 19 Schedule of Investments | 6/30/10 (continued) - ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value - ------------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 1,096,797 BBB/Baa3 Citigroup Mortgage Loan Trust, 0.34606%, 1/25/37 $ 1,042,732 378,199 0.45 AAA/Aa3 Citigroup Mortgage Loan Trust, Floating Rate Note, 10/25/36 373,343 1,470,000 0.76 AA+/Aa1 Citigroup Mortgage Loan Trust, Floating Rate Note, 7/25/35 1,381,394 1,234,991 0.50 B/Caa1 CMLTI 2006-WFH2 A2A, Floating Rate Note, 8/25/36 882,967 1,692,193 0.97 AA+/Aa1 Countrywide Asset-Backed Certificates, Floating Rate Note, 1/25/35 1,613,842 2,575,000 0.74 AA+/A3 Countrywide Asset-Backed Certificates, Floating Rate Note, 11/25/35 2,247,782 3,007,886 5.07 AAA/Ba2 Countrywide Asset-Backed Certificates, Floating Rate Note, 12/25/35 2,944,083 1,047,000 0.65 AA+/Aa2 Countrywide Asset-Backed Certificates, Floating Rate Note, 8/25/35 927,246 1,843,718 0.77 AA+/Aa1 Countrywide Asset-Backed Certificates, Floating Rate Note, 8/25/35 1,796,810 2,625,402 5.56 AAA/A2 CRMSI 2006-2 A3, Floating Rate Note, 9/25/36 2,633,354 2,163,110 AAA/Aaa FBR Securitization Trust, 2.76188%, 9/25/35 2,024,924 754,999 0.89 AAA/Aaa First Franklin Mortgage Loan Asset-Backed Certificate, Floating Rate Note, 9/24/34 698,818 1,909,340 0.63 AAA/NR First Franklin Mortgage Loan Asset-Backed Certificate, Floating Rate Note, 10/25/35 1,839,873 1,091,523 0.46 A/A2 Fremont Home Loan Trust, Floating Rate Note, 2/25/36 1,064,261 156,970 0.61 AAA/Aa2 GSAMP Trust, Floating Rate Note, 11/25/35 154,420 741,065 0.78 A/A2 GSAMP Trust, Floating Rate Note, 3/25/35 701,126 470,589 0.72 AAA/Aaa GSAMP Trust, Floating Rate Note, 8/25/36 454,320 1,260,657 0.73 AAA/Aa1 GSAMP Trust, Floating Rate Note, 9/25/35 1,215,477 4,984,394 BB/Baa3 Local Insight Media Finance LLC, 5.88%, 10/23/37 2,841,104 580,273 0.39 AAA/Aaa Morgan Stanley ABS Capital, Inc., Floating Rate Note, 10/25/36 573,399 639,577 0.41 B/A2 Morgan Stanley ABS Capital, Inc., Floating Rate Note, 12/25/36 596,121 1,722,636 BB-/A2 Morgan Stanley Home Equity Loan, 0.28125%, 12/25/36 1,666,024 1,283,274 0.45 BB-/A2 Morgan Stanley Home Equity Loan, Floating Rate Note, 4/25/37 1,190,904 The accompanying notes are an integral part of these financial statements. 20 Pioneer Bond Fund | Annual Report | 6/30/10 - ------------------------------------------------------------------------------------------------------ Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value - ------------------------------------------------------------------------------------------------------ Thrifts & Mortgage Finance -- (continued) 112,403 A-/Aa2 Morgan Stanley IXIS Real Estate, 1.445%, 11/25/36 $ 110,304 729,020 0.47 A/Aaa Option One Mortgage Loan Trust, Floating Rate Note, 2/25/38 708,617 292,755 0.44 BBB+/Aa2 Option One Mortgage Loan Trust, Floating Rate Note, 5/25/37 280,831 1,500,000 0.67 AA+/A3 RASC 2005-KS7 M1, Floating Rate Note, 8/25/35 1,184,117 1,674,586 0.60 BB/Baa1 SASC 2007-BC4 A3, Floating Rate Note, 11/25/37 1,562,869 1,397,027 BB-/Ba3 Saxon Asset Securities, 0.34594%, 11/25/36 1,314,309 -------------- $ 40,439,404 -------------- Total Banks $ 42,090,361 - ------------------------------------------------------------------------------------------------------ DIVERSIFIED FINANCIALS -- 1.3% Consumer Finance -- 0.0% 321,855 BBB-/A2 Indymac Residential Asset Backed Securities, 0.32375%, 7/25/37 $ 318,941 - ------------------------------------------------------------------------------------------------------ Diversified Financial Services -- 0.4% 408,536 0.79 AA/Aa2 Asset Backed Securities Corp., Floating Rate Note, 4/25/35 $ 390,705 1,344,346 AA/NR DT Auto Owner Trust, 5.92%, 10/15/15 1,345,777 482,037 0.59 AAA/Aaa JPMorgan Mortgage Acquisition, Floating Rate Note, 12/25/35 439,880 3,300,000 0.84 AA-/A3 Long Beach Mortgage Loan Trust, Floating Rate Note, 4/25/35 2,901,938 -------------- $ 5,078,300 - ------------------------------------------------------------------------------------------------------ Specialized Finance -- 0.9% 661,670 0.65 AA+/NR ARSI 2005-W4 A2C, Floating Rate Note, 2/25/36 $ 645,915 3,169,186 5.32 NR/Baa1 Irwin Home Equity Corp., Floating Rate Note, 6/25/35 3,029,831 573,834 AA+/Aa1 Master Asset Backed Securities Trust, 0.67375%, 5/25/35 547,946 908,073 0.70 AAA/Aaa New Century Home Equity Loan, Floating Rate Note, 3/25/35 871,337 4,994,639 0.82 AA+/Aa3 Nomura Home Equity Loan, Inc., Floating Rate Note, 5/25/35 4,787,761 126,788 0.47 AAA/Aa2 Nomura Home Equity Trust, Floating Rate Note, 3/25/36 125,659 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/10 21 Schedule of Investments | 6/30/10 (continued) - ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value - ---------------------------------------------------------------------------------------------------- Specialized Finance -- (continued) 900,000 0.63 AAA/Aaa SLMA 2004-10 A6B, Floating Rate Note, 4/27/26 $ 872,100 -------------- $ 10,880,549 -------------- Total Diversified Financials $ 16,277,790 - ---------------------------------------------------------------------------------------------------- TOTAL ASSET BACKED SECURITIES (Cost $77,127,439) $ 74,326,309 - ---------------------------------------------------------------------------------------------------- COLLATERALIZED MORTGAGE OBLIGATIONS -- 17.9% MATERIALS -- 0.5% Forest Products -- 0.5% 1,435,000 AA/Aa3 T SRAR 2006-1 B, 5.7467%, 10/15/36 $ 1,496,984 4,470,000 AAA/Aa1 TSTAR 2006-1A A, 5.668%, 10/15/36 4,867,613 -------------- $ 6,364,597 -------------- Total Materials $ 6,364,597 - ---------------------------------------------------------------------------------------------------- BANKS -- 11.0% Thrifts & Mortgage Finance -- 11.0% 3,460,941 NR/Aaa Banc of America Alternative Loan Trust, 5.0%, 7/25/19 $ 3,514,904 2,700,394 NR/Aaa Banc of America Alternative Loan Trust, 5.5%, 9/25/33 2,821,528 3,088,302 A/A Banc of America Funding Corp., 0.4013%, 9/25/36 2,918,446 1,526,066 AAA/NR Banc of America Funding Corp., 5.5%, 1/25/36 1,517,575 1,778,689 AAA/Aaa Bayview Commercial Asset Trust, 0.67375%, 4/25/34 1,444,689 3,100,000 5.00 AAA/Aa1 BCAP LLC 2006-RR1 PB, Floating Rate Note, 11/25/36 3,119,651 922,000 AAA/Aa2 BCAP LLC Trust, 5.0%, 11/25/36 939,377 4,307,062 AAA/Aaa Bear Stearns Adjustable Rate Mortgage, 4.754%, 10/25/33 4,417,958 2,207,705 2.56 AAA/Aaa Bear Stearns Adjustable Rate Mortgage, Floating Rate Note, 8/25/33 2,216,773 1,586,357 NR/Aaa Chase Commercial Mortgage Securities Corp., 6.275%, 2/12/16 1,626,380 1,307,717 AAA/Aaa Chase Mortgage Finance Corp., 5.0%, 10/25/33 1,349,288 2,963,072 NR/Ba3 Chase Mortgage Finance Corp., 5.5%, 5/25/35 2,893,715 2,680,147 CCC/Caa1 Chase Mortgage Finance Corp., 5.5%, 5/25/37 2,516,819 2,287,685 AAA/Aaa Citigroup Commercial Mortgage, 4.639%, 5/15/43 2,335,682 The accompanying notes are an integral part of these financial statements. 22 Pioneer Bond Fund | Annual Report | 6/30/10 - ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value - ---------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 1,053,429 NR/Aaa Citigroup Commercial Mortgage, 5.273%, 10/15/49 $ 1,070,616 1,068,172 AAA/AAA Countrywide Alternative Loan Trust, 5.0%, 7/25/18 1,091,239 2,624,539 AAA/A1 Countrywide Alternative Loan Trust, 5.0%, 8/25/19 2,657,716 1,072,000 AAA/Aa2 Countrywide Alternative Loan Trust, 5.125%, 3/25/34 1,071,893 1,774,493 AAA/Aa1 Countrywide Alternative Loan Trust, 5.5%, 4/25/34 1,772,411 6,916,783 BBB/NR Countrywide Alternative Loan Trust, 5.5%, 4/25/35 4,310,601 2,083,230 B-/Ba1 Countrywide Home Loan Mortgage, 4.5%, 9/25/35 1,593,259 504,610 NR/B2 CWHL 2005-16 A22, 5.5%, 9/25/35 482,077 180,948 NR/Aaa DLJ Commercial Mortgage Corp., 7.18%, 11/10/33 180,871 662,492 AAA/Aaa Downey Savings & Loan, 0.83625%, 7/19/44 484,190 3,375,000 AAA/Aaa GMAC Commercial Mortgage Securities, Inc., 4.864%, 12/10/41 3,522,993 2,572,030 AAA/Aaa GS Mortgage Securities Corp. II, 7.12%, 11/18/29 2,743,802 1,209,438 0.75 NR/Aaa Impac CMB Trust, Floating Rate Note, 11/25/35 989,676 360,184 1.15 AAA/Aaa Impac Securities Assets Corp., Floating Rate Note, 11/25/34 315,282 1,510,009 0.70 AAA/Aaa Impac Securities Assets Corp., Floating Rate Note, 5/25/36 1,226,820 1,750,000 AAA/Aaa JPMCC 2002-C3 B, 5.146%, 7/12/35 1,804,163 189,285 AAA/Aaa JPMorgan Chase Commercial Mortgage, 4.79%, 10/15/42 189,183 2,600,000 AAA/Aaa JPMorgan Mortgage Trust, 4.5%, 8/25/19 2,644,598 3,336,111 AAA/Aa3 JPMorgan Mortgage Trust, 6.0%, 8/25/34 3,404,525 5,298,455 AAA/Aaa LB-UBS Commercial Mortgage, 6.51%, 12/15/26 5,334,920 2,179,352 BB+/B3 Master Adjustable Rate Mortgage, 5.194229%, 1/25/35 1,895,222 2,225,423 AAA/NR Master Alternative Loans Trust, 4.5%, 1/25/15 2,182,435 1,616,202 AA/NR Master Alternative Loans Trust, 5.5%, 10/25/19 1,634,435 3,046,421 AAA/NR Master Alternative Loans Trust, 5.5%, 2/25/35 2,993,471 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/10 23 Schedule of Investments | 6/30/10 (continued) - ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value - ---------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 4,145,566 AAA/AAA Master Alternative Loans Trust, 6.0%, 7/25/34 $ 4,043,055 1,191,504 AAA/Aaa Master Asset Securitization Trust, 5.5%, 11/25/33 1,231,820 634,660 AAA/Aaa Merrill Lynch Mortgage Trust, 4.556%, 6/12/43 634,296 2,800,000 5.44 AAA/Aaa Merrill Lynch/Countrywide Commercial Mortgage, Floating Rate Note, 3/12/11 2,843,370 1,433,413 BBB/Baa1 RAAC Series, 6.0%, 1/25/32 1,444,652 1,617,501 CCC/B2 Residential Funding Mortgage Securities, 5.5%, 11/25/35 1,453,317 8,510,000 5.54 B+/B3 SASC 2007 BHC1 A1, Floating Rate Note, 12/18/49 1,693,490 2,890,000 5.58 CCC-/NR SASC 2007 BHC1 A2, Floating Rate Note, 12/18/49 (f) 232,963 1,990,375 0.97 AAA/Aaa Sequoia Mortgage Trust, Floating Rate Note, 9/20/33 1,745,801 8,768,833 AAA/Aaa Wachovia Bank Commercial Mortgage Trust, 4.368%, 8/15/41 8,970,489 324,199 AAA/NR Wachovia Bank Commercial Mortgage Trust, 4.516%, 5/15/44 324,121 3,787,250 AAA/Aaa Wachovia Bank Commercial Mortgage Trust, 4.803%, 10/15/41 3,927,266 3,000,000 AAA/Aaa Wachovia Bank Commercial Mortgage Trust, 4.957%, 8/15/35 3,037,839 940,994,744 AAA/Aaa Wachovia Bank Commercial Mortgage Trust, 0.015222%, 6/15/45 1,494,958 2,050,000 AAA/Baa1 WAMU 2003-S1 A5, 5.5%, 4/25/33 2,108,023 809,852 BB/NR WAMU Mortgage Pass-Through Certificate, 4.82069%, 9/25/35 812,776 2,463,073 0.58 AAA/Aa1 WAMU Mortgage Pass-Through Certificate, Floating Rate Note, 4/25/45 1,903,724 1,450,000 AAA/Aaa WBCMT 2003-C9 B, 5.109%, 12/15/35 1,371,344 1,972,534 AAA/A1 Wells Fargo Mortgage Backed Securities, 5.0%, 11/25/36 2,054,986 2,162,620 NR/B2 Wells Fargo Mortgage Backed Securities, 5.0%, 3/25/21 2,116,239 1,159,556 AAA/Aaa Wells Fargo Mortgage Backed Securities, 5.25%, 12/25/33 1,187,208 2,463,347 AAA/Baa1 Wells Fargo Mortgage Backed Securities, 5.5%, 5/25/35 2,481,455 863,705 2.95 AAA/Aa1 Wells Fargo Mortgage Backed Securities, Floating Rate Note, 10/25/34 857,585 868,993 3.00 AAA/Aa1 Wells Fargo Mortgage Backed Securities, Floating Rate Note, 10/25/35 852,254 The accompanying notes are an integral part of these financial statements. 24 Pioneer Bond Fund | Annual Report | 6/30/10 - -------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value - -------------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 1,019,981 4.52 AAA/Aaa Wells Fargo Mortgage Backed Securities, Floating Rate Note, 11/25/33 $ 1,039,712 407,671 4.54 AAA/Aa1 Wells Fargo Mortgage Backed Securities, Floating Rate Note, 6/25/34 401,898 3,271,593 3.13 AAA/Aaa Wells Fargo Mortgage Backed Securities, Floating Rate Note, 9/25/34 3,245,161 1,484,287 4.57 AAA/Aaa WFMBS 2003-N-1A1, Floating Rate Note, 12/25/33 1,498,656 4,200,000 4.76 AAA/Aaa WFMBS 2004-L A6, Floating Rate Note, 7/25/34 4,287,717 -------------- $ 138,525,358 -------------- Total Banks $ 138,525,358 - -------------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 3.3% Consumer Finance -- 0.1% 1,802,143 AAA/Aaa GMAC Mortgage Corp. Loan Trust, 5.5%, 11/25/33 $ 1,886,375 - -------------------------------------------------------------------------------------------------------- Diversified Financial Services -- 2.7% 4,314,692 NR/Aaa Banc of America Mortgage Securities, 3.613991%, 11/25/33 $ 4,148,611 3,300,000 AAA/NR Banc of America Mortgage Securities, 5.0%, 8/25/33 3,308,719 816,483 AAA/NR Banc of America Mortgage Securities, 5.75%, 1/25/35 820,543 2,777,303 2.94 NR/Ba3 Banc of America Mortgage Securities, Floating Rate Note, 5/25/35 2,624,888 1,392,514 5.12 AAA/NR Banc of America Mortgage Securities, Floating Rate Note, 9/25/35 1,396,434 2,750,000 NR/Ba2 Citicorp Mortgage Securities, 5.5%, 4/25/35 2,748,083 1,769,375 NR/B1 CMSI 2006-1 3A1, 5.0%, 2/25/36 1,674,102 2,435,000 NR/Aa2 Crown Castle Towers LLC, 5.362%, 11/15/36 2,519,165 296,757 AAA/Aaa First Horizon Mortgage Pass-Through Trust, 5.0%, 3/25/18 306,654 2,206,088 CCC/NR JPMorgan Alternative Loan Trust, 6.0%, 3/25/36 1,584,580 249,080 AAA/Aaa Morgan Stanley Capital I, 7.0%, 7/25/33 255,327 1,658,373 CCC/Caa3 RALI 2005-QA10 A41, 5.7412%, 9/25/35 1,139,189 1,691,895 NR/Aa1 Residential Accredit Loans, Inc., 5.0%, 3/25/19 1,706,299 5,247,311 NR/Aaa Residential Accredit Loans, Inc., 5.0%, 5/25/19 5,400,936 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/10 25 Schedule of Investments | 6/30/10 (continued) - ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value - ------------------------------------------------------------------------------------------------------- Diversified Financial Services -- (continued) 2,615,400 NR/Aaa Residential Accredit Loans, Inc., 5.0%, 8/25/18 $ 2,689,758 1,099,123 B-/B3 Residential Accredit Loans, Inc., 0.49875%, 5/25/47 565,107 888,377 NR/NR Vericrest Opportunity Loan Trust, 4.25%, 5/25/39 884,646 ------------ $ 33,773,041 - ------------------------------------------------------------------------------------------------------- Investment Banking & Brokerage -- 0.4% 1,463,666 AAA/Aaa Banc of America Commercial Mortgage, Inc., 4.05%, 11/10/38 $ 1,483,545 1,440,000 AAA/Aaa Banc of America Commercial Mortgage, Inc., 4.877%, 7/10/42 1,508,113 1,850,000 5.46 NR/Aaa Bear Stearns Commercial Mortgage, Floating Rate Note, 4/12/38 1,867,766 132,372 NR/Aaa Morgan Stanley Dean Witter, 7.2%, 10/15/33 132,467 ------------ $ 4,991,891 - ------------------------------------------------------------------------------------------------------- Specialized Finance -- 0.1% 881,864 AAA/NR CW Capital Cobalt, Ltd., 5.174%, 8/15/48 $ 920,925 ------------ Total Diversified Financials $ 41,572,232 - ------------------------------------------------------------------------------------------------------- REAL ESTATE -- 1.0% Mortgage Real Estate Investment Trusts -- 1.0% 2,857,945 AAA/Aaa Credit Suisse First Boston Mortgage Securities, 3.5%, 7/25/18 $ 2,766,977 674,488 AA/Aa2 Credit Suisse First Boston Mortgage Securities, 7.0%, 5/25/32 416,702 2,904,274 1.70 AA+/Aa2 Credit Suisse First Boston Mortgage Securities, Floating Rate Note, 12/25/33 2,766,443 1,612,183 1.75 AA+/WR Credit Suisse First Boston Mortgage Securities, Floating Rate Note, 8/25/33 1,505,785 5,680,499 AAA/Aaa Credit Suisse First Boston, 6.51%, 2/15/34 5,716,460 ------------ $ 13,172,367 ------------ Total Real Estate $ 13,172,367 - ------------------------------------------------------------------------------------------------------- GOVERNMENT -- 2.1% 919,589 AAA/Aaa Fannie Mae Remics, 0.58125%, 9/25/20 $ 919,349 2,700,000 NR/NR Fannie Mae Remics, 5.0%, 3/25/24 2,900,947 5,000,000 NR/NR Fannie Mae Remics, 5.0%, 7/25/33 5,426,392 313,108 AAA/Aaa Fannie Mae Remics, 5.69%, 1/25/32 327,071 254,920 AAA/Aaa Federal Home Loan Bank, 6.0%, 4/15/32 264,096 The accompanying notes are an integral part of these financial statements. 26 Pioneer Bond Fund | Annual Report | 6/30/10 - ----------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value - ----------------------------------------------------------------------------------------------------- Government -- (continued) 1,181 NR/NR Federal National Mortgage Association, 10.3%, 4/25/19 $ 1,206 7,751 NR/NR Federal National Mortgage Association, 10.3%, 4/25/19 9,010 3,400,000 AAA/Aaa FHR 3211 PB, 5.5%, 2/15/33 3,613,545 5,000,000 NR/NR Freddie Mac Remics, 5.0%, 6/15/33 5,398,209 1,368,201 AAA/Aaa Freddie Mac, 5.0%, 8/15/35 1,401,699 752,610 AAA/Aaa Freddie Mac, 6.1%, 9/15/18 752,340 84,192,996 0.71 NR/NR Government National Mortgage Association, Floating Rate Note, 11/16/51 3,644,993 1,402,457 AAA/A2 GSR Mortgage Loan Trust, 4.1408%, 6/25/34 1,383,526 -------------- $ 26,042,383 -------------- Total Government $ 26,042,383 - ----------------------------------------------------------------------------------------------------- TOTAL COLLATERALIZED MORTGAGE OBLIGATIONS (Cost $233,972,590) $ 225,676,937 - ----------------------------------------------------------------------------------------------------- CORPORATE BONDS -- 39.2% ENERGY -- 4.4% Integrated Oil & Gas -- 0.2% 1,200,000 A/A2 BP Capital Markets Plc, 5.25%, 11/7/13 (b) $ 1,103,107 990,000 BBB+/Baa1 Marathon Oil Corp., 5.9%, 3/15/18 1,092,612 45,000 BBB+/Baa2 Petro-Canada, 4.0%, 7/15/13 47,172 -------------- $ 2,242,891 - ----------------------------------------------------------------------------------------------------- Oil & Gas Drilling -- 0.3% 5,150,000 BBB+/Baa2 Transocean Sedco, 1.5%, 12/15/37 $ 4,570,625 - ----------------------------------------------------------------------------------------------------- Oil & Gas Equipment & Services -- 0.3% 900,000 3.62 NR/NR Sevan Marine ASA, Floating Rate Note, 5/14/13 (144A) $ 720,000 2,815,000 BBB/Baa1 Weatherford International, Ltd., 9.625%, 3/1/19 3,389,798 -------------- $ 4,109,798 - ----------------------------------------------------------------------------------------------------- Oil & Gas Exploration & Production -- 1.1% 2,180,000 BBB/Baa2 Canadian Natural Resource, 5.9%, 2/1/18 $ 2,441,650 1,020,000 BB/Ba3 Chesapeake Energy Corp., 9.5%, 2/15/15 1,127,100 2,292,000 BB/B1 Denbury Resources, Inc., 8.25%, 2/15/20 2,395,140 160,000 BB/B1 Denbury Resources, Inc., 9.75%, 3/1/16 172,800 1,730,115 BBB+/NR Gazprom International SA, 7.201%, 2/1/20 1,786,344 250,000 B+/B3 Mariner Energy, Inc., 11.75%, 6/30/16 311,250 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/10 27 Schedule of Investments | 6/30/10 (continued) - -------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value - -------------------------------------------------------------------------------------------------------- Oil & Gas Exploration & Production -- (continued) 1,605,000 A/Aa2 Ras Laffan Liquefied Natural Gas Co., Ltd. III, 5.832%, 9/30/16 (144A) $ 1,726,178 200,000 BBB-/Baa2 TNK-BP Finance SA, 6.625%, 3/20/17 197,000 1,000,000 BBB-/Baa2 TNK-BP Finance SA, 6.625%, 3/20/17 (144A) 985,000 2,080,000 BBB-/Baa2 TNK-BP Finance SA, 7.5%, 7/18/16 (144A) 2,152,800 1,000,000 BBB-/Baa2 TNK-BP Finance SA, 7.875%, 3/13/18 (144A) 1,042,000 -------------- $ 14,337,262 - -------------------------------------------------------------------------------------------------------- Oil & Gas Refining & Marketing -- 0.6% 1,150,000 B+/B1 Holly Energy Partners LP, 6.25%, 3/1/15 $ 1,098,250 100,000 B/B2 Petroplus Finance, 7.0%, 5/1/17 (144A) (b) 81,500 2,475,000 BBB/Baa2 Spectra Energy Capital, 6.2%, 4/15/18 2,743,107 2,890,000 BBB/Baa2 Valero Energy Corp., 9.375%, 3/15/19 3,500,619 -------------- $ 7,423,476 - -------------------------------------------------------------------------------------------------------- Oil & Gas Storage & Transportation -- 1.9% 435,000 BBB-/Baa2 Boardwalk Pipelines LLC, 5.5%, 2/1/17 $ 449,793 1,535,000 BBB/Baa2 Buckeye Partners LP, 6.05%, 1/15/18 1,697,147 2,900,000 BBB/Baa2 DCP Midstream, 9.75%, 3/15/19 3,729,768 3,250,000 BBB/Baa2 Kinder Morgan Energy, 5.95%, 2/15/18 3,510,124 1,450,000 BBB-/Baa3 NGPL Pipeco LLC, 6.514%, 12/15/12 (144A) 1,443,906 3,500,000 BBB-/Baa3 Plains All America Pipeline, 6.125%, 1/15/17 3,799,138 3,885,000 BBB+/A3 Questar Pipeline Co., 5.83%, 2/1/18 4,383,826 3,345,000 BB/Ba1 Southern Union Co., 7.2%, 11/1/66 2,964,506 1,500,000 BBB/Baa2 Spectra Energy Capital LLC, 6.75%, 7/15/18 1,681,008 -------------- $ 23,659,216 -------------- Total Energy $ 56,343,268 - -------------------------------------------------------------------------------------------------------- MATERIALS -- 2.4% Aluminum -- 0.2% 2,290,000 B-/Caa1 Novelis, Inc., 7.25%, 2/15/15 $ 2,209,850 - -------------------------------------------------------------------------------------------------------- Commodity Chemicals -- 0.1% 1,700,000 B+/B1 Nova Chemicals Corp., 8.375%, 11/1/16 $ 1,691,500 - -------------------------------------------------------------------------------------------------------- Construction Materials -- 0.2% 2,260,000 6.64 B-/NR C8 Capital SPV, Ltd., Floating Rate Note, 12/31/49 $ 1,467,664 475,000 BBB/Baa2 Holcim, Ltd., 6.0%, 12/30/19 (144A) 506,713 -------------- $ 1,974,377 - -------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 28 Pioneer Bond Fund | Annual Report | 6/30/10 - -------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value - -------------------------------------------------------------------------------------------------------- Diversified Metals & Mining -- 0.6% 1,865,000 BBB/Baa1 Anglo American Capital Plc, 9.375%, 4/8/14 $ 2,229,484 2,725,000 BBB+/Baa1 Rio Tinto Finance Plc, 8.95%, 5/1/14 3,305,251 1,655,000 BBB/Baa3 Teck Resources, Ltd., 10.25%, 5/15/16 1,952,900 -------------- $ 7,487,635 - -------------------------------------------------------------------------------------------------------- Fertilizers & Agricultural Chemicals -- 0.5% 4,368,000 BBB/Baa2 Agrium, Inc., 6.75%, 1/15/19 $ 5,066,487 1,500,000 BB+/B1 CF Industries Holdings, Inc., 6.875%, 5/1/18 1,526,250 45,000 A-/Baa1 Potash Corp. Saskatchewan, 4.875%, 3/1/13 48,400 -------------- $ 6,641,137 - -------------------------------------------------------------------------------------------------------- Specialty Chemicals -- 0.2% 2,400,000 BBB-/Baa3 Cytec Industries, Inc., 8.95%, 7/1/17 $ 2,932,334 - -------------------------------------------------------------------------------------------------------- Steel -- 0.6% 3,900,000 BBB/Baa3 ArcelorMittal, 6.125%, 6/1/18 $ 4,078,936 2,805,000 BBB-/Baa2 Commercial Metals Co., 7.35%, 8/15/18 2,944,159 -------------- $ 7,023,095 -------------- Total Materials $ 29,959,928 - -------------------------------------------------------------------------------------------------------- CAPITAL GOODS -- 2.7% Aerospace & Defense -- 0.2% 3,020,000 BB/Ba2 Esterline Technology, 6.625%, 3/1/17 $ 2,974,700 - -------------------------------------------------------------------------------------------------------- Building Products -- 0.4% 2,225,000 6.72 B-/BBB- C10 Capital SPV, Ltd., Floating Rate Note, 12/31/49 $ 1,447,919 3,510,000 BBB/Ba2 Masco Corp., 7.125%, 3/15/20 3,408,161 -------------- $ 4,856,080 - -------------------------------------------------------------------------------------------------------- Construction & Farm Machinery & Heavy Trucks -- 0.2% 1,200,000 A/A2 Caterpillar, Inc., 7.9%, 12/15/18 (b) $ 1,542,396 910,000 BBB/Baa3 Cummins, Inc., 6.75%, 2/15/27 975,094 600,000 B-/B3 Oshkosh Corp., 8.5%, 3/1/20 624,000 -------------- $ 3,141,490 - -------------------------------------------------------------------------------------------------------- Electrical Components & Equipment -- 0.4% 2,665,000 BB/Ba2 Anixter International Corp., 5.95%, 3/1/15 $ 2,541,744 2,670,000 B+/Ba2 Belden CDT, Inc., 7.0%, 3/15/17 2,579,888 -------------- $ 5,121,632 - -------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/10 29 Schedule of Investments | 6/30/10 (continued) - ------------------------------------------------------------------------------------------------------ Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value - ------------------------------------------------------------------------------------------------------ Industrial Conglomerates -- 0.3% 2,950,000 BBB-/Baa2 Tyco Electronics Group SA, 6.55%, 10/1/17 $ 3,387,815 525,000 A-/Baa1 Tyco International Finance SA, 8.5%, 1/15/19 678,670 -------------- $ 4,066,485 - ------------------------------------------------------------------------------------------------------ Industrial Machinery -- 0.4% 2,150,000 BBB+/Baa1 Ingersoll-Rand Global Holding, 9.5%, 4/15/14 $ 2,663,820 1,810,000 BBB-/Ba1 Valmont Industries, Inc., 6.625%, 4/20/20 1,854,879 -------------- $ 4,518,699 - ------------------------------------------------------------------------------------------------------ Trading Companies & Distributors -- 0.8% 495,000 BB-/Ba2 Ace Hardware Corp., 9.125%, 6/1/16 (144A) $ 518,513 5,660,000 BBB+/Baa1 GATX Financial Corp., 6.0%, 2/15/18 (b) 6,027,589 3,450,000 BBB-/Baa2 Glencore Funding LLC, 6.0%, 4/15/14 (144A) 3,450,638 -------------- $ 9,996,740 -------------- Total Capital Goods $ 34,675,826 - ------------------------------------------------------------------------------------------------------ COMMERCIAL SERVICES & SUPPLIES -- 0.3% Office Services & Supplies -- 0.3% 3,110,000 A/A1 Pitney Bowes, Inc., 5.6%, 3/15/18 $ 3,468,661 -------------- Total Commercial Services & Supplies $ 3,468,661 - ------------------------------------------------------------------------------------------------------ TRANSPORTATION -- 1.0% Airlines -- 0.1% 799,825 BBB+/Baa2 Southwest Airlines Co., 7.67%, 1/2/14 $ 833,178 - ------------------------------------------------------------------------------------------------------ Railroads -- 0.9% 2,140,000 BBB+/A3 Burlington Northern Santa Fe Corp., 5.75%, 3/15/18 $ 2,403,443 3,400,000 BB-/B2 Kansas City Southern Mexico, 7.625%, 12/1/13 3,468,000 5,125,000 BBB/Baa2 Union Pacific Corp., 5.7%, 8/15/18 5,740,969 -------------- $ 11,612,412 -------------- Total Transportation $ 12,445,590 - ------------------------------------------------------------------------------------------------------ AUTOMOBILES & COMPONENTS -- 0.1% Automobile Manufacturers -- 0.1% 655,000 BBB-/Baa3 Hyundai Motor Manufacturers, 4.5%, 4/15/15 $ 649,550 -------------- Total Automobiles & Components $ 649,550 - ------------------------------------------------------------------------------------------------------ The accompanying notes are an integral part of these financial statements. 30 Pioneer Bond Fund | Annual Report | 6/30/10 - ------------------------------------------------------------------------------------------------------ Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value - ------------------------------------------------------------------------------------------------------ CONSUMER DURABLES & APPAREL -- 0.4% Household Appliances -- 0.4% 4,235,000 BBB-/Baa3 Whirlpool Corp., 5.5%, 3/1/13 $ 4,535,893 -------------- Total Consumer Durables & Apparel $ 4,535,893 - ------------------------------------------------------------------------------------------------------ CONSUMER SERVICES -- 0.8% Casinos & Gaming -- 0.0% 1,160,000 D/WR Station Casinos, Inc., 6.625%, 3/15/18 (e) $ 870 - ------------------------------------------------------------------------------------------------------ Education Services -- 0.7% 2,160,000 AAA/Aaa Leland Stanford Junior University, 4.75%, 5/1/19 $ 2,353,039 2,470,000 AAA/Aaa President & Fellows of Harvard, 3.7%, 4/1/13 2,615,928 3,095,000 AAA/Aaa President & Fellows of Harvard, 6.3%, 10/1/37 3,504,128 -------------- $ 8,473,095 - ------------------------------------------------------------------------------------------------------ Restaurants -- 0.1% 1,200,000 A/A3 McDonald's Corp., 5.35%, 3/1/18 $ 1,374,346 -------------- Total Consumer Services $ 9,848,311 - ------------------------------------------------------------------------------------------------------ MEDIA -- 0.7% Broadcasting -- 0.6% 2,620,000 BBB+/Baa1 Grupo Telivisa SA, 6.0%, 5/15/18 (144A) $ 2,814,221 500,000 BBB+/Baa1 News America, Inc., 5.65%, 8/15/20 552,251 4,250,000 B+/B3 Intelsat Subsidiary Holding Co., 8.5%, 1/15/13 4,281,875 -------------- $ 7,648,347 - ------------------------------------------------------------------------------------------------------ Cable & Satellite -- 0.1% 800,000 BBB/Baa2 Time Warner Cable, Inc., 8.25%, 4/1/19 $ 983,842 425,000 BBB/Baa2 Time Warner Cable, Inc., 8.75%, 2/14/19 536,239 -------------- $ 1,520,081 -------------- Total Media $ 9,168,428 - ------------------------------------------------------------------------------------------------------ RETAILING -- 0.5% General Merchandise Stores -- 0.2% 2,000,000 A+/A2 Target Corp., 5.375%, 5/1/17 $ 2,277,536 - ------------------------------------------------------------------------------------------------------ Internet Retail -- 0.2% 3,000,000 BBB-/Ba1 Expedia, Inc., 8.5%, 7/1/16 (144A) $ 3,225,000 - ------------------------------------------------------------------------------------------------------ Specialty Stores -- 0.1% 1,105,000 BB-/B3 Sally Holdings, 9.25%, 11/15/14 (144A) $ 1,146,438 -------------- Total Retailing $ 6,648,974 - ------------------------------------------------------------------------------------------------------ The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/10 31 Schedule of Investments | 6/30/10 (continued) - ----------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value - ----------------------------------------------------------------------------------------------------- FOOD & DRUG RETAILING -- 0.2% Hypermarkets & Supercenters -- 0.2% 2,000,000 AA/Aa2 Wal-Mart Stores, Inc., 5.875%, 4/5/27 $ 2,258,300 -------------- Total Food & Drug Retailing $ 2,258,300 - ----------------------------------------------------------------------------------------------------- FOOD, BEVERAGE & TOBACCO -- 1.0% Agricultural Products -- 0.3% 3,500,000 A/A2 Cargill, Inc., 5.2%, 1/22/13 (144A) $ 3,769,224 - ----------------------------------------------------------------------------------------------------- Brewers -- 0.3% 2,930,000 BBB+/Baa2 Anheuser-Busch InBev Worldwide, Inc., 7.75%, 1/15/19 (144A) $ 3,556,323 55,000 BBB+/Baa1 Miller Brewing Co., 5.5%, 8/15/13 (144A) 60,170 -------------- $ 3,616,493 - ----------------------------------------------------------------------------------------------------- Packaged Foods & Meats -- 0.3% 3,725,000 BBB-/Baa2 Kraft Foods, Inc., 6.5%, 2/9/40 $ 4,165,776 - ----------------------------------------------------------------------------------------------------- Tobacco -- 0.1% 1,535,000 BBB/WR UST, Inc., 5.75%, 3/1/18 $ 1,598,013 -------------- Total Food, Beverage & Tobacco $ 13,149,506 - ----------------------------------------------------------------------------------------------------- HEALTH CARE EQUIPMENT & SERVICES -- 0.4% Health Care Facilities -- 0.1% 1,050,000 BB/Ba3 HCA, Inc., 7.875%, 2/15/20 $ 1,080,188 385,000 BB/Ba3 HCA, Inc., 8.5%, 4/15/19 408,100 310,000 BB-/NR HCA, Inc., 9.875%, 2/15/17 333,250 -------------- $ 1,821,538 - ----------------------------------------------------------------------------------------------------- Managed Health Care -- 0.3% 3,275,000 A-/Baa1 United Health Group, 4.875%, 2/15/13 $ 3,519,105 -------------- Total Health Care Equipment & Services $ 5,340,643 - ----------------------------------------------------------------------------------------------------- PHARMACEUTICALS & BIOTECHNOLOGY -- 0.5% Biotechnology -- 0.4% 5,055,000 BBB+/Baa3 Biogen Idec, Inc., 6.0%, 3/1/13 $ 5,560,262 - ----------------------------------------------------------------------------------------------------- Pharmaceuticals -- 0.1% 1,000,000 AA/A1 Abbott Laboratories, 5.125%, 4/1/19 $ 1,115,769 -------------- Total Pharmaceuticals & Biotechnology $ 6,676,031 - ----------------------------------------------------------------------------------------------------- BANKS -- 4.3% Diversified Banks -- 1.1% 3,515,000 A/Baa1 Barclays Plc, 6.05%, 12/4/17 $ 3,547,493 3,400,000 AA-/Aa3 BNP Paribas SA, 1.34438%, 4/27/17 3,244,307 3,230,000 A-/A3 Credit Agricole SA, 8.375%, 12/13/49 3,052,350 1,855,000 A/A1 Industrial Bank of Korea, 7.125%, 4/23/14 2,085,354 The accompanying notes are an integral part of these financial statements. 32 Pioneer Bond Fund | Annual Report | 6/30/10 - -------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value - -------------------------------------------------------------------------------------------------------- Diversified Banks -- (continued) 2,000,000 3.29 A-/NR Scotiabank Peru SA, Floating Rate Note, 3/15/17 (144A) $ 2,002,600 -------------- $ 13,932,104 - -------------------------------------------------------------------------------------------------------- Regional Banks -- 3.2% 1,870,000 BBB+/A2 American Express Bank FSB, 5.5%, 4/16/13 $ 2,020,595 2,000,000 A/Aa3 Branch Banking & Trust Co., 4.875%, 1/15/13 (b) 2,124,114 1,190,000 A/NR Cobank ACB, 7.875%, 4/16/18 (144A) 1,372,855 2,425,000 BBB+/A3 KeyBank NA, 5.8%, 7/1/14 2,588,937 2,030,000 BBB+/Baa1 Keycorp, 6.5%, 5/14/13 2,220,558 2,505,000 A+/Aa3 Mellon Funding Corp., 5.5%, 11/15/18 2,684,042 1,435,000 A/A2 PNC Bank NA, 6.0%, 12/7/17 1,564,896 6,273,000 8.25 BBB/Baa3 PNC Funding Corp., Floating Rate Note, 5/29/49 6,439,385 2,755,000 A-/Baa1 Sovereign Bancorp, 8.75%, 5/30/18 3,158,112 6,670,000 BBB+/Baa1 State Street Capital, 8.25%, 3/15/42 6,679,338 3,520,000 AA-/Aa3 Wachovia Bank NA, 6.0%, 11/15/17 3,835,649 5,470,000 7.70 A-/Ba1 Wells Fargo & Co., Floating Rate Note, 12/29/49 5,524,700 -------------- $ 40,213,181 -------------- Total Banks $ 54,145,285 - -------------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 7.2% Asset Management & Custody Banks -- 1.0% 2,000,000 A+/Aa3 Bank of New York, 4.95%, 3/15/15 $ 2,161,274 3,945,000 A-/A3 Eaton Vance Corp., 6.5%, 10/2/17 4,486,274 5,400,000 BB+/Baa3 Janus Capital Group, Inc., 6.95%, 6/15/17 5,420,887 -------------- $ 12,068,435 - -------------------------------------------------------------------------------------------------------- Consumer Finance -- 1.9% 4,435,000 B/B2 American General Finance, 6.9%, 12/15/17 $ 3,531,369 3,875,000 A+/A1 American Honda Finance, 6.7%, 10/1/13 (144A) 4,410,479 1,765,000 BBB/A3 Capital One Bank U.S.A. NA, 8.8%, 7/15/19 2,203,445 3,335,000 BB/Baa3 Capitial One Capital VI, 8.875%, 5/15/40 3,472,979 2,575,000 A/A2 Caterpillar Financial, 7.05%, 10/1/18 3,106,004 3,750,000 AAA/Aaa John Deere Capital Corp., 2.875%, 6/19/12 3,899,573 790,000 BBB/Baa2 Nissan Motor Acceptance Corp., 4.5%, 1/30/15 (144A) 815,139 3,155,000 4.00 BBB-/Ba1 SLM Corp., Floating Rate Note, 7/25/14 2,680,362 -------------- $ 24,119,350 - -------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/10 33 Schedule of Investments | 6/30/10 (continued) - ----------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value - ----------------------------------------------------------------------------------------------------- Diversified Financial Services -- 1.7% 3,085,000 BBB-/Baa3 AngloGold Ashanti Holdings, 5.375%, 4/15/20 $ 3,132,080 625,000 0.00 BB+/NR Caelus Re II, Ltd., Floating Rate Note, 5/24/13 610,313 1,625,000 NR/A2 Crown Castle Towers LLC, 6.113%, 1/15/20 1,783,525 1,840,000 BBB/Baa2 Hyundai Capital Services, Inc., 6.0%, 5/5/15 1,971,277 2,575,000 A+/Aa3 JPMorgan Chase & Co., 6.0%, 1/15/18 2,843,405 5,750,000 BBB+/Baa1 JPMorgan Chase & Co., 7.9%, 4/29/49 5,926,698 1,400,000 BB+/NR Lodestone Re, Ltd., 0.0%, 5/17/13 (144A) 1,331,540 1,100,000 A-/A3 Nationsbank Corp., 7.75%, 8/15/15 1,236,578 887,640 A-/Baa1 PF Export Receivable Master Trust, 6.436%, 6/1/15 (144A) 934,241 1,051,451 BBB/Baa2 Power Receivables Finance LLC, 6.29%, 1/1/12 (144A) 1,072,207 1,250,000 0.00 BB/NR Residential Reinsurance 2010, Floating Rate Note, 6/6/13 (144A) 1,211,500 -------------- $ 22,053,364 - ----------------------------------------------------------------------------------------------------- Investment Banking & Brokerage -- 2.0% 2,000,000 A/A1 Goldman Sachs, 5.5%, 11/15/14 $ 2,117,444 11,040,000 5.79 BBB/Baa2 Goldman Sachs Capital, Floating Rate Note, 12/29/49 8,335,200 3,125,000 BBB/Baa2 Jefferies Group, Inc., 6.875%, 4/15/21 3,133,106 2,730,000 A-/A2 Macquarie Group, Ltd., 6.0%, 1/14/20 2,766,882 3,325,000 A/A2 Merrill Lynch & Co., 5.45%, 2/5/13 3,488,051 3,125,000 A/A2 Morgan Stanley, 5.5%, 1/26/20 3,023,125 2,765,000 A/A2 Morgan Stanley Dean Witter, 6.625%, 4/1/18 2,898,091 -------------- $ 25,761,899 - ----------------------------------------------------------------------------------------------------- Specialized Finance -- 0.6% 4,680,000 BBB/Baa3 Cantor Fitzgerald LP, 7.875%, 10/15/19 $ 4,842,419 2,000,000 A+/A1 National Rural Utilities Corp., 5.45%, 2/1/18 2,219,004 -------------- $ 7,061,423 -------------- Total Diversified Financials $ 91,064,471 - ----------------------------------------------------------------------------------------------------- INSURANCE -- 3.7% Insurance Brokers -- 0.1% 1,560,000 BB+/B1 Leucadia National, 7.125%, 3/15/17 (144A) $ 1,505,400 - ----------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 34 Pioneer Bond Fund | Annual Report | 6/30/10 - --------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value - --------------------------------------------------------------------------------------------------------- Life & Health Insurance -- 1.6% 850,000 BBB/Baa3 Delphi Financial Group, Inc., 7.875%, 1/31/20 $ 929,061 3,380,000 BBB/Ba1 Lincoln National Corp., 6.05%, 4/20/67 2,535,000 1,690,000 A-/Baa2 Lincoln National Corp., 8.75%, 7/1/19 2,071,244 4,200,000 BBB/Baa2 MetLife, Inc., 10.75%, 8/1/39 4,991,826 4,250,000 A-/Baa2 Protective Life Corp., 7.375%, 10/15/19 4,614,438 2,800,000 A/Baa2 Prudential Financial, Inc., 5.15%, 1/15/13 2,963,327 2,140,000 BBB+/Baa3 Prudential Financial, Inc., 8.875%, 6/15/38 2,257,700 -------------- $ 20,362,596 - --------------------------------------------------------------------------------------------------------- Multi-Line Insurance -- 0.8% 4,620,000 BB/Baa3 Liberty Mutual Group, 7.0%, 3/15/37 (144A) $ 3,626,515 3,035,000 BBB-/Baa2 Liberty Mutual Group, 7.3%, 6/15/14 (144A) 3,299,710 650,000 10.75 BB/Baa3 Liberty Mutual Group, Floating Rate Note, 6/15/58 (144A) 702,000 2,650,000 A/A3 Loew Corp., 5.25%, 3/15/16 2,875,793 -------------- $ 10,504,018 - --------------------------------------------------------------------------------------------------------- Property & Casualty Insurance -- 0.7% 5,000,000 BBB-/Baa3 Hanover Insurance Group, 7.625%, 10/15/25 $ 5,145,910 700,000 BBB-/Baa3 The Hanover Insurance Group, Inc., 7.5%, 3/1/20 756,141 2,000,000 A-/A2 The Travelers Co., Inc., 6.25%, 6/15/37 2,212,428 -------------- $ 8,114,479 - --------------------------------------------------------------------------------------------------------- Reinsurance -- 0.5% 600,000 0.00 BB+/A2 Foundation Re III, Ltd., Floating Rate Note, 2/3/14 $ 574,080 5,048,000 BBB+/BBB+ Platinum Underwriters HD, 7.5%, 6/1/17 5,409,704 -------------- $ 5,983,784 -------------- Total Insurance $ 46,470,277 - --------------------------------------------------------------------------------------------------------- REAL ESTATE -- 3.1% Diversified Real Estate Activities -- 0.4% 4,125,000 A-/A2 WEA Finance LLC, 7.125%, 4/15/18 $ 4,654,357 - --------------------------------------------------------------------------------------------------------- Diversified Real Estate Investment Trusts -- 0.7% 5,125,000 BBB+/Baa1 Dexus Finance Pty, Ltd., 7.125%, 10/15/14 $ 5,581,120 1,765,000 BBB/Baa2 Digital Realty Trust LP, 4.5%, 7/15/15 (144A) 1,765,212 725,000 BBB/Baa2 Digital Realty Trust LP, 5.875%, 2/1/20 (144A) 739,679 -------------- $ 8,086,011 - --------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/10 35 Schedule of Investments | 6/30/10 (continued) - ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value - ------------------------------------------------------------------------------------------------------- Office Real Estate Investment Trusts -- 0.2% 692,000 BBB/Baa2 Mack-Cali Realty LP, 5.125%, 1/15/15 $ 707,067 1,607,000 BBB/Baa2 Mack-Cali Realty LP, 5.125%, 2/15/14 1,679,543 ------------ $ 2,386,610 - ------------------------------------------------------------------------------------------------------- Real Estate Operating Companies -- 0.0% 180,000 B-/B3 Forest City Enterprises, 7.625%, 6/1/15 $ 165,600 - ------------------------------------------------------------------------------------------------------- Retail Real Estate Investment Trusts -- 0.2% 2,905,000 BB/Baa3 Developers Diversified Realty, 7.5%, 4/1/17 $ 2,850,923 - ------------------------------------------------------------------------------------------------------- Specialized Real Estate Investment Trusts -- 1.6% 4,125,000 BBB-/Baa2 Health Care Real Estate Investment Trusts, Inc., 6.2%, 6/1/16 $ 4,480,592 860,000 BBB-/Baa2 Health Care, Inc., 6.0%, 11/15/13 934,658 2,425,000 BBB-/Baa3 Healthcare Realty Trust, Inc., 6.5%, 1/17/17 2,535,764 5,325,000 BBB/Baa2 Hospitality Properties Trust, 7.875%, 8/15/14 5,870,722 4,285,000 BBB-/Ba1 Senior Housing Properties Trust, 6.75%, 4/15/20 4,231,438 540,000 BBB-/Baa3 Ventas Realty LP Capital Corp., 6.75%, 4/1/17 546,524 1,910,000 BBB-/Baa3 Ventas Realty LP/V, 6.5%, 6/1/16 1,944,890 ------------ $ 20,544,588 ------------ Total Real Estate $ 38,688,089 - ------------------------------------------------------------------------------------------------------- SOFTWARE & SERVICES -- 0.7% Data Processing & Outsourced Services -- 0.2% 3,095,000 B-/Caa1 First Data Corp., 9.875%, 9/24/15 $ 2,352,200 - ------------------------------------------------------------------------------------------------------- Internet Software & Services -- 0.3% 3,950,000 NR/A2 GTP Towers Issuer LLC, 4.436%, 2/15/15 (144A) $ 3,989,479 - ------------------------------------------------------------------------------------------------------- Systems Software -- 0.2% 1,800,000 A/A2 Oracle Corp., 5.75%, 4/15/18 $ 2,083,813 ------------ Total Software & Services $ 8,425,492 - ------------------------------------------------------------------------------------------------------- TECHNOLOGY HARDWARE & EQUIPMENT -- 0.7% Communications Equipment -- 0.1% 497,000 BBB-/Ba2 Brocade Communications, 6.625%, 1/15/18 $ 493,273 497,000 BBB-/Ba2 Brocade Communications, 6.875%, 1/15/20 (144A) (b) 493,273 ------------ $ 986,546 - ------------------------------------------------------------------------------------------------------- Computer Hardware -- 0.2% 1,700,000 A/A2 Hewlett-Packard Co., 4.5%, 3/1/13 $ 1,834,985 - ------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 36 Pioneer Bond Fund | Annual Report | 6/30/10 - -------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value - -------------------------------------------------------------------------------------------------------- Electronic Equipment & Instruments -- 0.4% 5,070,000 BBB-/Baa3 Agilent Technologies, Inc., 6.5%, 11/1/17 $ 5,599,582 -------------- Total Technology Hardware & Equipment $ 8,421,113 - -------------------------------------------------------------------------------------------------------- SEMICONDUCTORS -- 0.2% Semiconductor Equipment -- 0.2% 3,140,000 BBB/Baa1 Klac Instruments Corp., 6.9%, 5/1/18 $ 3,512,702 -------------- Total Semiconductors $ 3,512,702 - -------------------------------------------------------------------------------------------------------- TELECOMMUNICATION SERVICES -- 0.5% Integrated Telecommunication Services -- 0.5% 1,200,000 A/A2 AT&T, Inc., 5.6%, 5/15/18 $ 1,334,896 2,530,000 B-/B2 Cincinnati Bell, Inc., 8.25%, 10/15/17 2,365,550 1,990,000 BBB-/Baa3 Embarq Corp., 7.082%, 6/1/16 2,121,457 -------------- $ 5,821,903 -------------- Total Telecommunication Services $ 5,821,903 - -------------------------------------------------------------------------------------------------------- UTILITIES -- 3.4% Electric Utilities -- 2.1% 1,275,000 BBB+/Baa1 CenterPoint Energy Houston Electric LLC, 7.0%, 3/1/14 $ 1,480,344 980,000 A-/Baa1 Commonwealth Edison, 6.15%, 9/15/17 1,124,799 774,410 BBB-/Baa3 Crocket Cogeneration, 5.869%, 3/30/25 (144A) 785,112 3,365,000 A-/A2 Enel Finance International SA, 5.125%, 10/7/19 (144A) 3,379,991 454,000 BBB+/A3 Entergy Gulf States, 5.7%, 6/1/15 454,676 1,330,308 BBB-/Baa3 FPL Energy America Wind LLC, 6.639%, 6/20/23 (144A) 1,414,689 457,800 B+/Ba2 FPL Energy Wind Funding, 6.876%, 6/27/17 (144A) 452,078 1,925,000 BBB/Baa2 Israel Electric Corp., Ltd., 7.25%, 1/15/19 (144A) 2,127,918 610,000 BBB/Baa2 Israel Electric Corp., Ltd., 9.375%, 1/28/20 (144A) 767,112 910,000 BBB/Baa3 Nevada Power Co., 6.5%, 8/1/18 1,041,714 5,055,000 BBB+/Baa2 New York State Gas and Electric, 6.15%, 12/15/17 (144A) 5,267,957 1,081,700 NR/WR Orcal Geothermal, 6.21%, 12/30/20 (144A) 1,031,499 2,690,000 BB+/Baa3 Public Service of New Mexico, 7.95%, 5/15/18 2,833,307 3,550,000 BBB+/A3 West Penn Power Co., 5.95%, 12/15/17 3,825,139 -------------- $ 25,986,335 - -------------------------------------------------------------------------------------------------------- Gas Utilities -- 0.2% 2,450,000 A/Aa3 Nakilat, Inc., 6.267%, 12/31/33 (144A) $ 2,377,186 - -------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/10 37 Schedule of Investments | 6/30/10 (continued) - ------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value - ------------------------------------------------------------------------------------------------------------------- Independent Power Producer & Energy Traders -- 1.0% 5,553,290 NR/Ba1 Coso Geothermal Power Holdings, 7.0%, 7/15/26 (144A) $ 5,327,327 2,675,000 BB-/Ba3 Intergen NV, 9.0%, 6/30/17 (b) 2,661,625 2,105,000 BBB-/Baa3 Kiowa Power Partners LLC, 5.737%, 3/20/21 (144A) 2,133,754 2,597,126 BBB-/Baa3 Panoche Energy Center LLC, 6.88%, 7/31/29 (144A) 2,762,589 -------------- $ 12,885,295 - ------------------------------------------------------------------------------------------------------------------- Multi-Utilities -- 0.1% 1,365,000 BB/Ba2 NSG Holdings, Inc., 7.75%, 12/15/25 $ 1,201,200 417,490 NR/NR Ormat Funding Corp., 8.25%, 12/30/20 396,616 -------------- $ 1,597,816 -------------- Total Utilities $ 42,846,632 - ------------------------------------------------------------------------------------------------------------------- TOTAL CORPORATE BONDS (Cost $455,671,403) $ 494,564,873 - ------------------------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AGENCY OBLIGATIONS -- 23.5% 4,386,654 AAA/Aaa Federal Home Loan Mortgage Corp., 4.5%, 3/1/20 - 10/1/20 $ 4,669,516 11,142,724 AAA/Aaa Federal Home Loan Mortgage Corp., 5.0%, 10/1/20 - 6/1/35 11,907,026 6,512,307 AAA/Aaa Federal Home Loan Mortgage Corp., 5.5%, 12/1/18 - 11/1/35 7,026,984 14,684,320 AAA/Aaa Federal Home Loan Mortgage Corp., 6.0%, 5/1/17 - 12/1/36 16,076,234 1,082,903 AAA/Aaa Federal Home Loan Mortgage Corp., 6.5%, 3/1/13 - 4/1/34 1,199,794 770,028 AAA/Aaa Federal Home Loan Mortgage Corp., 7.0%, 8/1/22 - 11/1/30 834,071 4,213 AAA/Aaa Federal Home Loan Mortgage Corp., 8.0%, 8/1/31 4,689 216,215 AAA/Aaa Federal National Mortgage Association, 4.0%, 7/1/18 228,644 7,545,151 AAA/Aaa Federal National Mortgage Association, 4.5%, 11/1/20 - 10/1/35 7,946,667 32,392,320 AAA/Aaa Federal National Mortgage Association, 5.0%, 12/1/17 - 7/1/39 34,395,073 17,823,384 AAA/Aaa Federal National Mortgage Association, 5.5%, 9/1/17 - 6/1/36 19,211,769 17,271,934 AAA/Aaa Federal National Mortgage Association, 6.0%, 6/1/16 - 7/1/38 18,923,637 1,566,389 AAA/Aaa Federal National Mortgage Association, 6.5%, 7/1/29 - 7/1/34 1,748,597 681,598 AAA/Aaa Federal National Mortgage Association, 7.0%, 3/1/12 - 1/1/32 755,886 The accompanying notes are an integral part of these financial statements. 38 Pioneer Bond Fund | Annual Report | 6/30/10 - ------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value - ------------------------------------------------------------------------------------------------------------------- U.S. Government Agency Obligations -- (continued) 4,235 AAA/Aaa Federal National Mortgage Association, 7.5%, 8/1/20 - 4/1/30 $ 4,780 36,127 AAA/Aaa Federal National Mortgage Association, 8.0%, 4/1/20 - 5/1/31 41,816 8,769,422 AAA/Aaa Government National Mortgage Association, 4.5%, 7/15/33 - 4/15/38 9,193,599 2,598,302 AAA/Aaa Government National Mortgage Association, 5.0%, 10/15/18 - 4/15/35 2,791,059 17,597,352 AAA/Aaa Government National Mortgage Association, 5.5%, 10/15/17 - 2/15/37 19,136,804 17,063,565 AAA/Aaa Government National Mortgage Association, 6.0%, 4/15/13 - 10/15/36 18,761,461 7,901,387 AAA/Aaa Government National Mortgage Association, 6.5%, 8/15/11 - 7/15/35 8,818,671 1,161,081 AAA/Aaa Government National Mortgage Association, 7.0%, 9/15/11 - 5/15/32 1,317,063 148,884 AAA/Aaa Government National Mortgage Association, 7.5%, 8/15/11 - 12/15/31 169,831 9,774 AAA/Aaa Government National Mortgage Association, 7.75%, 2/15/30 11,267 267,607 AAA/Aaa Government National Mortgage Association I, 6.0%, 2/15/29 296,149 77,560 AAA/Aaa Government National Mortgage Association I, 7.0%, 12/15/30 - 3/15/31 88,092 12,550 AAA/Aaa Government National Mortgage Association I, 7.5%, 10/15/29 14,292 1,869,624 AAA/Aaa Government National Mortgage Association II, 4.5%, 12/20/34 - 1/20/35 1,963,768 1,667,434 AAA/Aaa Government National Mortgage Association II, 5.5%, 10/20/19 - 11/20/34 1,810,455 92,257 AAA/Aaa Government National Mortgage Association II, 6.5%, 2/20/29 - 4/20/29 104,548 408,190 AAA/Aaa Government National Mortgage Association II, 7.0%, 11/20/28 - 12/20/30 456,864 22,500,000 AAA/Aaa U.S. Treasury Bonds, 2.75%, 2/15/19 22,415,625 1,980,000 AAA/Aaa U.S. Treasury Bonds, 4.5%, 11/15/10 2,011,478 5,100,000 AAA/Aaa U.S. Treasury Bonds, 5.25%, 11/15/28 6,138,329 4,750,000 AAA/Aaa U.S. Treasury Bonds, 6.25%, 8/15/23 6,157,188 3,980,000 AAA/Aaa U.S. Treasury Notes, 1.25%, 11/30/10 3,997,102 6,380,000 AAA/Aaa U.S. Treasury Notes, 3.125%, 5/15/19 6,513,080 2,500,000 AAA/Aaa U.S. Treasury Notes, 3.625%, 8/15/19 2,643,555 7,620,000 AAA/Aaa U.S. Treasury Notes, 4.25%, 5/15/39 8,056,961 1,365,000 NR/Aaa U.S. Treasury Notes, 4.375%, 11/15/39 1,473,560 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/10 39 Schedule of Investments | 6/30/10 (continued) - ------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value - ------------------------------------------------------------------------------------------------------------------- U.S. Government Agency Obligations -- (continued) 5,450,000 AAA/Aaa U.S. Treasury Notes, 4.375%, 2/15/38 $ 5,892,813 7,340,000 AAA/Aaa U.S. Treasury Notes, 4.5%, 2/15/36 8,108,410 8,435,000 AAA/Aaa U.S. Treasury Notes, 4.5%, 5/15/38 9,303,544 9,068,000 AAA/Aaa U.S. Treasury Notes, 4.5%, 8/15/39 9,987,550 11,000,000 NR/Aaa U.S. Treasury Notes, 4.625%, 2/15/40 12,364,682 840,000 AAA/Aaa U.S. Treasury Notes, 5.5%, 8/15/28 1,038,450 450,000 AAA/Aaa U.S. Treasury Notes, 7.875%, 2/15/21 644,133 -------------- $ 296,655,566 - ------------------------------------------------------------------------------------------------------------------- TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS (Cost $277,817,134) $ 296,655,566 - ------------------------------------------------------------------------------------------------------------------- FOREIGN GOVERNMENT BONDS -- 0.1% BANKS -- 0.1% Diversified Banks -- 0.1% 625,000 A/A1 Bank of Korea Export-Import, 5.875%, 1/14/15 $ 677,199 - ------------------------------------------------------------------------------------------------------------------- TOTAL FOREIGN GOVERNMENT BONDS (Cost $621,956) $ 677,199 - ------------------------------------------------------------------------------------------------------------------- MUNICIPAL BONDS -- 1.0% Municipal General -- 0.3% 2,095,000 A+/A1 State of Illinois, 1.395%, 2/1/11 $ 2,091,878 1,470,000 A+/A1 State of Illinois, 3.321%, 1/1/13 1,464,443 -------------- $ 3,556,321 - ------------------------------------------------------------------------------------------------------------------- Municipal Higher Education -- 0.7% 4,380,000 AAA/Aa2 California State University Revenue, 5.0%, 11/1/39 $ 4,407,375 4,600,000 AAA/Aaa Connecticut State Health & Education, 5.0%, 7/1/42 4,808,380 -------------- $ 9,215,755 - ------------------------------------------------------------------------------------------------------------------- TOTAL MUNICIPAL BONDS (Cost $12,405,077) $ 12,772,076 - ------------------------------------------------------------------------------------------------------------------- SENIOR FLOATING RATE LOAN INTERESTS -- 7.7%** ENERGY -- 0.2% Oil & Gas Equipment & Services -- 0.1% 1,527,546 8.50 B+/NR Hudson Products Holdings, Inc., Term Loan, 8/24/15 $ 1,382,429 - ------------------------------------------------------------------------------------------------------------------- Oil & Gas Refining & Marketing -- 0.1% 1,750,000 0.00 NR/Ba2 Pilot Travel Centers, Initial Tranche B Term Loan, 11/24/15 $ 1,748,119 -------------- Total Energy $ 3,130,548 - ------------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 40 Pioneer Bond Fund | Annual Report | 6/30/10 - ------------------------------------------------------------------------------------------------------ Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value - ------------------------------------------------------------------------------------------------------ MATERIALS -- 0.7% Aluminum -- 0.1% 631,275 2.54 BB-/Ba3 Novelis Corp., U.S. Term Loan, 7/6/14 $ 598,002 214,379 2.35 BB-/Ba3 Novelis, Inc., Canadian Term Loan, 7/6/14 203,079 -------------- $ 801,081 - ------------------------------------------------------------------------------------------------------ Commodity Chemicals -- 0.0% 573,522 2.04 BB+/Ba2 Celanese Holdings LLC, Term Loan, 4/2/14 $ 544,846 - ------------------------------------------------------------------------------------------------------ Diversified Chemical -- 0.2% 358,847 2.11 BB-/Ba2 Huntsman Corp., New Term B Dollar Loan, 4/21/14 $ 333,600 960,000 7.50 NR/NR Ineos U.S. Finance Corp., Senior Credit Facility Term B2 Loan, 12/16/13 907,500 960,000 8.00 NR/NR Ineos U.S. Finance Corp., Senior Credit Facility Term C2 Loan, 12/16/14 907,500 -------------- $ 2,148,600 - ------------------------------------------------------------------------------------------------------ Metal & Glass Containers -- 0.2% 502,857 5.50 B+/Ba3 BWAY Holding Co., Term B Loan, 3/28/17 $ 503,383 194,793 2.68 B+/B2 Graham Packaging Co., Term B Loan, 10/7/11 193,210 1,840,750 6.75 B+/B2 Graham Packaging Co., Term C Loan, 4/5/14 1,850,818 47,143 5.50 B+/Ba3 ICL Industrial Containers, Term C Loan, 3/28/17 47,192 -------------- $ 2,594,603 - ------------------------------------------------------------------------------------------------------ Paper Packaging -- 0.2% 2,631,148 3.04 BB/Ba2 Graphic Packaging International, Inc., Incremental Term Loan, 5/16/14 $ 2,544,225 - ------------------------------------------------------------------------------------------------------ Specialty Chemicals -- 0.0% 385,000 6.00 NR/NR Chemtura Corp., Term Facility Loan, 3/22/11 $ 386,444 -------------- Total Materials $ 9,019,799 - ------------------------------------------------------------------------------------------------------ CAPITAL GOODS -- 0.8% Aerospace & Defense -- 0.6% 987,521 4.09 NR/NR DAE Aviation Holdings, Tranche B1 Term Loan, 7/31/14 $ 893,706 2,900,000 0.00 BB/Ba1 DynCorp International LLC, Term B Loan, 6/30/16 2,885,500 958,706 4.09 NR/NR Standard Aero, Ltd., Tranche B2 Term Loan, 7/31/14 867,629 587,508 5.50 NR/Ba2 Tasc, Inc., Tranche A Term Loan, 12/18/14 588,242 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/10 41 Schedule of Investments | 6/30/10 (continued) - ------------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value - ------------------------------------------------------------------------------------------------------------------- Aerospace & Defense -- (continued) 242,531 5.75 NR/Ba2 Tasc, Inc., Tranche B Term Loan, 12/18/15 $ 243,138 2,000,000 3.50 NR/NR Triumph Group, Inc., Term Loan, 3/23/16 2,002,501 -------------- $ 7,480,716 - ------------------------------------------------------------------------------------------------------------------- Construction & Farm Machinery & Heavy Trucks -- 0.2% 912,849 9.75 D/Caa1 Accuride Corp., U.S. Advance Term Loan, 6/30/13 $ 913,419 897,788 4.50 BB/Ba2 Bucyrus International, Inc., Tranche C U.S. Dollar Term Loan, 12/21/15 897,414 764,654 6.54 BB-/Ba3 Oshkosh Corp., Term B Loan, 12/6/13 766,392 -------------- $ 2,577,225 -------------- Total Capital Goods $ 10,057,941 - ------------------------------------------------------------------------------------------------------------------- COMMERCIAL SERVICES & SUPPLIES -- 0.3% Diversified Support Services -- 0.1% 530,391 2.06 BB+/Ba1 Iron Mountain, Inc., Initial Term Loan, 4/16/14 $ 525,087 - ------------------------------------------------------------------------------------------------------------------- Environmental & Facilities Services -- 0.2% 298,500 6.00 NR/Ba3 Advanced Disposal Services, Inc., Term B Loan, 12/23/14 $ 298,127 2,924,623 2.35 D/B2 Synagro Technologies, Inc., 1st Lien Term Loan, 4/2/14 2,529,799 -------------- $ 2,827,926 -------------- Total Commercial Services & Supplies $ 3,353,013 - ------------------------------------------------------------------------------------------------------------------- TRANSPORTATION -- 0.2% Air Freight & Couriers -- 0.1% 462,700 3.29 B-/B1 Ceva Group Plc, Additional Pre-Funded Term Loan, 11/4/13 $ 403,705 1,191,369 3.35 NR/B1 Ceva Group Plc, U.S. Dollar Term Loan, 11/4/13 1,040,959 -------------- $ 1,444,664 - ------------------------------------------------------------------------------------------------------------------- Marine -- 0.1% 721,875 3.79 NR/NR Horizon Lines, Inc., Term Loan, 8/8/12 $ 656,004 -------------- Total Transportation $ 2,100,668 - ------------------------------------------------------------------------------------------------------------------- AUTOMOBILES & COMPONENTS -- 0.6% Auto Parts & Equipment -- 0.2% 1,089,982 3.10 BB-/B2 Allison Transmission, Term Loan, 8/7/14 $ 995,631 1,080,405 2.29 NR/NR Federal Mogul Corp., Tranche B Term Loan, 12/29/14 944,004 551,227 2.29 NR/NR Federal Mogul Corp., Tranche C Term Loan, 12/28/15 481,635 -------------- $ 2,421,270 - ------------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 42 Pioneer Bond Fund | Annual Report | 6/30/10 - --------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value - --------------------------------------------------------------------------------------------------------- Automobile Manufacturers -- 0.1% 1,742,880 3.33 CCC/Ba3 Ford Motor Co., Tranche B1 Term Loan, 12/15/13 $ 1,650,471 - --------------------------------------------------------------------------------------------------------- Tires & Rubber -- 0.3% 4,190,000 2.24 BB/Ba1 Goodyear Tire & Rubber Co., 2nd Lien Term Loan, 4/30/14 $ 3,872,260 -------------- Total Automobiles & Components $ 7,944,001 - --------------------------------------------------------------------------------------------------------- CONSUMER DURABLES & APPAREL -- 0.1% Housewares & Specialties -- 0.1% 651,827 3.03 BB+/Ba1 Jarden Corp., Term B3 Loan, 1/24/12 $ 642,186 -------------- Total Consumer Durables & Apparel $ 642,186 - --------------------------------------------------------------------------------------------------------- CONSUMER SERVICES -- 0.2% Casinos & Gaming -- 0.2% 393,153 2.80 NR/NR Gateway Casinos & Entertainment, Delayed Draw Term Advance Loan, 9/30/14 $ 372,840 1,941,067 2.80 NR/NR Gateway Casinos & Entertainment, Term Advance Loan, 9/30/14 1,840,778 -------------- $ 2,213,618 - --------------------------------------------------------------------------------------------------------- Specialized Consumer Services -- 0.0% 333,304 7.00 NR/NR Web Service Center, Term Loan, 8/28/14 $ 330,387 -------------- Total Consumer Services $ 2,544,005 - --------------------------------------------------------------------------------------------------------- MEDIA -- 0.6% Broadcasting -- 0.2% 3,279,181 2.54 B-/Baa2 Univision Communication, Inc., Initial Term Loan, 9/29/14 $ 2,760,433 - --------------------------------------------------------------------------------------------------------- Cable & Satellite -- 0.2% 421,409 2.35 NR/NR Charter Communications, Inc., Term B1 Loan, 3/5/14 $ 391,617 924,297 2.60 B/B1 Knology, Inc., Term Loan, 6/30/12 911,588 621,651 2.84 CCC/B2 WideOpenWest LLC, 1st Lien Term Loan, 6/30/14 569,277 -------------- $ 1,872,482 - --------------------------------------------------------------------------------------------------------- Movies & Entertainment -- 0.2% 1,433,083 5.25 NR/NR Christie/AIX, Inc., Term Loan, 3/31/16 $ 1,424,126 1,695,750 4.50 B+/NR Live Nation Entertainment, Term B Loan, 10/20/16 1,684,445 -------------- $ 3,108,571 -------------- Total Media $ 7,741,486 - --------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/10 43 Schedule of Investments | 6/30/10 (continued) - ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value - ------------------------------------------------------------------------------------------------------- RETAILING -- 0.1% Automotive Retail -- 0.1% 1,250,000 0.00 NR/NR Autotrader.com, Inc., Tranche B Term Loan, 5/30/16 $ 1,252,344 -------------- Total Retailing $ 1,252,344 - ------------------------------------------------------------------------------------------------------- FOOD & DRUG RETAILING -- 0.0% Food Retail -- 0.0% 354,076 2.85 BB-/Ba3 Pinnacle Foods, Inc., Term Loan, 4/19/14 $ 332,641 -------------- Total Food & Drug Retailing $ 332,641 - ------------------------------------------------------------------------------------------------------- HEALTH CARE EQUIPMENT & SERVICES -- 1.2% Health Care Facilities -- 0.7% 1,655,850 6.50 B+/B1 Ardent Health Services LLC, Term Loan, 7/19/15 $ 1,612,901 111,403 2.79 BB-/Ba3 CHS/Community Health Systems, Inc., Delayed Draw Term Loan, 7/25/14 104,176 2,171,359 2.79 BB-/Ba3 CHS/Community Health Systems, Inc., Funded Term Loan, 7/25/14 2,030,492 572,021 2.35 B+/Ba2 Hanger Orthopedic Group, Inc., Tranche B Term Loan, 5/26/13 555,575 747,900 2.78 BB+/Ba2 HCA, Inc., Tranche B1 Term Loan, 11/18/13 706,978 1,793,613 3.78 BB+/Ba2 HCA, Inc., Tranche B2 Term Loan, 3/17/17 1,717,805 529,292 2.20 B+/Ba2 Psychiatric Solutions, Inc., Term Loan, 7/2/12 524,329 170,690 2.29 B+/Ba2 Sun Health Care Group, Inc., Synthetic Term Loan, 4/19/14 165,334 1,182,337 2.45 B+/Ba2 Sun Health Care Group, Inc., Term Loan, 4/19/14 1,145,241 -------------- $ 8,562,831 - ------------------------------------------------------------------------------------------------------- Health Care Services -- 0.2% 2,786,624 2.60 NR/NR Catalent Pharma Solutions, Inc., Dollar Term Loan, 4/10/14 $ 2,513,187 - ------------------------------------------------------------------------------------------------------- Health Care Supplies -- 0.3% 544,670 3.60 BB-/B1 Bausch & Lomb, Inc., Delayed Draw Term Loan, 4/24/15 $ 514,107 2,248,835 3.65 BB-/B1 Bausch & Lomb, Inc., Parent Term Loan, 4/24/15 2,122,645 1,507,477 3.51 BB/Ba2 Biomet, Inc., Dollar Term Loan, 3/25/15 1,452,171 -------------- $ 4,088,923 - ------------------------------------------------------------------------------------------------------- Health Care Technology -- 0.0% 470,364 5.25 NR/NR IMS Health, Inc., Tranche B Dollar Term Loan, 11/9/16 $ 467,963 -------------- Total Health Care Equipment & Services $ 15,632,904 - ------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 44 Pioneer Bond Fund | Annual Report | 6/30/10 - ------------------------------------------------------------------------------------------------------ Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value - ------------------------------------------------------------------------------------------------------ PHARMACEUTICALS & BIOTECHNOLOGY -- 0.2% Biotechnology -- 0.2% 702,034 5.50 NR/B1 Warner Chilcott Corp., Term A Loan, 10/30/14 $ 701,683 330,790 5.75 NR/B1 Warner Chilcott Corp., Term B1 Loan, 4/30/15 330,414 550,825 5.75 NR/B1 Warner Chilcott Corp., Term B2 Loan, 4/30/15 550,199 910,425 5.75 NR/B1 Warner Chilcott Corp., Term B3 Loan, 4/30/15 910,197 -------------- $ 2,492,493 -------------- Total Pharmaceuticals & Biotechnology $ 2,492,493 - ------------------------------------------------------------------------------------------------------ DIVERSIFIED FINANCIALS -- 0.5% Diversified Financial Services -- 0.1% 496,231 3.35 B-/B1 Ceva Group Plc, EGL Term Loan, 11/4/13 $ 433,582 700,875 3.60 NR/Ba1 Metavante Corp., Term Loan, 11/3/14 696,787 -------------- $ 1,130,369 - ------------------------------------------------------------------------------------------------------ Specialized Finance -- 0.4% 4,121,006 3.79 NR/NR Charter Communications Operations, Term C Loan, 9/8/16 $ 3,847,251 985,000 4.75 BBB-/Ba2 MSCI, Inc., Term Loan, 6/1/16 985,821 -------------- $ 4,833,072 -------------- Total Diversified Financials $ 5,963,441 - ------------------------------------------------------------------------------------------------------ INSURANCE -- 0.1% Insurance Brokers -- 0.1% 330,480 3.03 B/NR HUB International Holdings, Delayed Draw Term Loan, 6/13/14 $ 295,780 1,470,243 3.03 B/NR HUB International Holdings, Initial Term Loan, 6/13/14 1,315,868 -------------- $ 1,611,648 -------------- Total Insurance $ 1,611,648 - ------------------------------------------------------------------------------------------------------ SOFTWARE & SERVICES -- 0.3% Application Software -- 0.0% 388,000 2.35 B/Ba3 Nuance Communications, Inc., Incremental Term Loan, 3/29/13 $ 369,328 - ------------------------------------------------------------------------------------------------------ The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/10 45 Schedule of Investments | 6/30/10 (continued) - --------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value - --------------------------------------------------------------------------------------------------------- IT Consulting & Other Services -- 0.3% 87,834 2.79 BB/B1 Keane International, Inc., Synthetic Term Loan, 6/4/13 $ 80,588 1,125,798 2.79 BB/B1 Keane International, Inc., Closing Date Term Loan, 6/4/13 1,032,920 2,388,131 2.10 BB/Ba3 Sungard Data Systems, Inc., Tranche A U.S. Term Loan, 2/28/14 2,253,799 -------------- $ 3,367,307 - --------------------------------------------------------------------------------------------------------- Systems Software -- 0.0% 381,319 5.25 BB-/Ba3 Dealer Computer Service, Term Loan, 4/1/17 $ 378,062 -------------- Total Software & Services $ 4,114,697 - --------------------------------------------------------------------------------------------------------- TECHNOLOGY HARDWARE & EQUIPMENT -- 0.3% Electronic Components -- 0.3% 505,034 2.55 NR/Ba1 Flextronics Semiconductor, A1A Delayed Draw Term Loan, 10/1/14 $ 469,261 321,429 2.60 NR/Ba1 Flextronics Semiconductor, A2 Delayed Draw Term Loan, 10/1/14 298,929 375,000 2.60 NR/Ba1 Flextronics Semiconductor, A3 Delayed Draw Term Loan, 10/1/14 348,750 2,732,504 2.54 NR/Ba1 Flextronics Semiconductor, Closing Date Loan, 10/1/14 2,538,953 -------------- $ 3,655,893 -------------- Total Technology Hardware & Equipment $ 3,655,893 - --------------------------------------------------------------------------------------------------------- SEMICONDUCTORS -- 0.4% Semiconductor Equipment -- 0.3% 3,985,704 3.69 B+/Ba3 Aeroflex, Inc., Tranche B1 Term Loan, 8/15/14 $ 3,736,597 - --------------------------------------------------------------------------------------------------------- Semiconductors -- 0.1% 1,535,000 4.75 BB/Ba2 Intersil Corp., Term Loan, 4/27/16 $ 1,533,841 -------------- Total Semiconductors $ 5,270,438 - --------------------------------------------------------------------------------------------------------- TELECOMMUNICATION SERVICES -- 0.4% Integrated Telecommunication Services -- 0.3% 428,925 6.50 BB/Ba3 Cincinnati Bell, Inc., Tranche B Term Loan, 5/12/17 $ 417,398 2,976,268 3.35 NR/NR Telesat Canada, Inc., U.S. Term I Loan, 10/31/14 2,847,296 255,650 3.35 NR/NR Telesat Canada, Inc., U.S. Term II Loan, 10/31/14 244,572 -------------- $ 3,509,266 - --------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 46 Pioneer Bond Fund | Annual Report | 6/30/10 - ------------------------------------------------------------------------------------------------------------------ Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value - ------------------------------------------------------------------------------------------------------------------ Wireless Telecommunication Services -- 0.1% 1,180,000 3.29 B+/B3 Intelsat Jackson Holdings, Ltd., Term Loan, 2/1/14 $ 1,089,730 -------------- Total Telecommunication Services $ 4,598,996 - ------------------------------------------------------------------------------------------------------------------ UTILITIES -- 0.5% Electric Utilities -- 0.2% 397,000 3.85 BBB-/Ba1 Texas Competitive Electric Holdings, Delayed Draw Term Loan, 10/10/14 $ 291,866 3,831,766 3.98 BBB-/Ba1 Texas Competitive Electric Holdings, Initial Tranche B2 Term Loan, 10/10/14 2,842,692 -------------- $ 3,134,558 - ------------------------------------------------------------------------------------------------------------------ Independent Power Producer & Energy Traders -- 0.3% 3,461,508 3.42 B+/B1 Calpine Corp., 1st Priority Term Loan, 3/29/14 $ 3,175,453 -------------- Total Utilities $ 6,310,011 - ------------------------------------------------------------------------------------------------------------------ TOTAL SENIOR FLOATING RATE LOAN INTERESTS (Cost $99,468,771) $ 97,769,153 - ------------------------------------------------------------------------------------------------------------------ TEMPORARY CASH INVESTMENTS -- 5.2% Repurchase Agreement -- 4.6% 19,430,000 BNP Paribas SA, 0.03%, dated 6/30/10, repurchase price of $19,430,000 plus accrued interest on 7/1/10 collateralized by the following: $14,359,755 Freddie Mac Giant, 5.5%, 1/1/36 $5,458,845 Federal National Mortgage Association, 6.0%, 12/1/37 $ 19,430,000 19,430,000 JPMorgan, Inc., 0.03%, dated 6/30/10, repurchase price of $19,430,000 plus accrued interest on 7/1/10 collateralized by $19,818,964 Federal National Mortgage Association, 5.5 - 7.5%, 2/1/29 - 6/1/38 19,430,000 19,430,000 Societe Generale SA, 0.03%, dated 6/30/10, repurchase price of $19,430,000 plus accrued interest on 7/1/10 collateralized by the following: $14,841,021 Federal National Mortgage Association, 4.5 - 5.0%, 1/1/25 - 12/1/36 $4,977,579 Federal National Mortgage Association (ARM), 4.82%, 7/1/35 19,430,000 -------------- $ 58,290,000 - ------------------------------------------------------------------------------------------------------------------ The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/10 47 Schedule of Investments | 6/30/10 (continued) - --------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value - --------------------------------------------------------------------------------------------------------- SECURITIES LENDING COLLATERAL -- 0.6% (c) Certificates of Deposit: 212,756 Bank of Nova Scotia, 0.47%, 9/7/10 $ 212,756 212,756 Barclays, 0.30%, 7/23/10 212,756 234,031 CBA Financial, 0.56%, 1/3/11 234,031 212,756 Deutschebank, 0.30%, 7/19/10 212,756 127,653 DnB NOR Bank ASA NY, 0.49%, 8/26/10 127,653 212,756 Rabobank Nederland NY, 0.23%, 7/6/10 212,756 212,756 Royal Bank of Canada, 0.26%, 1/21/11 212,756 212,756 Svenska NY, 0.265%, 7/19/10 212,756 -------------- $ 1,638,220 - --------------------------------------------------------------------------------------------------------- Commercial Paper: 127,653 American Honda Finance, 0.38%, 5/4/11 $ 127,653 85,102 American Honda Finance, 0.38%, 4/15/11 85,102 28,147 Caterpillar Financial Services, 0.47%, 8/20/10 28,147 212,795 Federal Home Loan Bank, 0.31%, 6/1/11 212,795 85,090 NABPP, 0.28%, 7/19/10 85,090 106,331 PARFIN, 0.39%, 8/11/10 106,331 212,747 SOCNAM, 0.28%, 7/6/10 212,747 170,089 CHARF, 0.46%, 8/23/10 170,089 127,555 CLIPPR, 0.45%, 9/1/10 127,555 88,552 FAIRPP, 0.50%, 8/16/10 88,552 106,292 FASCO, 0.46%, 9/2/10 106,292 97,782 FASCO, 0.45%, 9/9/10 97,782 148,923 SRCPP, 0.26%, 7/7/10 148,923 149,277 STRAIT, 0.43%, 8/23/10 149,277 102,640 TBLLC, 0.40%, 8/9/10 102,640 212,713 Varfun, 0.29%, 7/26/10 212,713 192,355 CME, Inc., 1.00%, 8/6/10 192,355 63,839 GE Capital Corp., 0.64%, 8/20/10 63,839 23,030 GE Capital Corp., 0.40%, 10/21/10 23,030 23,189 GE Capital Corp., 0.35%, 10/6/10 23,189 106,367 GE, 0.37%, 1/26/11 106,367 21,257 GE Capital Corp., 0.33%, 6/6/11 21,257 23,723 John Deere Capital Corp., 0.32%, 7/16/10 23,723 179,916 JPMorgan Chase & Co., 0.57%, 9/24/10 179,916 241,205 Santander, 0.30%, 7/23/10 241,205 212,756 Toyota Motor Credit Corp., 0.35%, 1/10/11 212,756 127,661 Wachovia, 0.64%, 3/22/11 127,661 The accompanying notes are an integral part of these financial statements. 48 Pioneer Bond Fund | Annual Report | 6/30/10 - --------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value - --------------------------------------------------------------------------------------------------------- Commercial Paper -- (continued) 59,578 Wal-Mart Stores, Inc., 0.22%, 7/1/10 $ 59,578 85,088 WFC, 0.60%, 12/2/10 85,088 212,756 WESTPAC, 0.39%, 11/5/10 212,756 --------------- $ 3,634,408 - --------------------------------------------------------------------------------------------------------- Tri-party Repurchase Agreements: 266,923 Barclays, 0.1%, 7/1/10 $ 266,923 531,889 Deutsche Bank, 0.3%, 7/1/10 531,889 638,267 RBS Securities, Inc., 0.5%, 7/1/10 638,267 --------------- $ 1,437,079 - --------------------------------------------------------------------------------------------------------- Shares - --------------------------------------------------------------------------------------------------------- Money Market Mutual Funds 319,134 Blackrock Liquidity Temp Cash Fund $ 319,134 319,134 Dreyfus Preferred Money Market Fund 319,134 --------------- $ 638,268 --------------- Total Securities Lending Collateral $ 7,347,975 - --------------------------------------------------------------------------------------------------------- TOTAL TEMPORARY CASH INVESTMENTS (Cost $65,637,975) $ 65,637,975 - --------------------------------------------------------------------------------------------------------- TOTAL INVESTMENT IN SECURITIES -- 102.5% (Cost $1,247,788,510) (a) $1,294,704,229 - --------------------------------------------------------------------------------------------------------- OTHER ASSETS AND LIABILITIES -- (2.5)% $ (31,990,067) - --------------------------------------------------------------------------------------------------------- TOTAL NET ASSETS -- 100.0% $1,262,714,162 ========================================================================================================= * Non-income producing security. NR Not rated by either S&P or Moody's. WR Withdrawn rating. (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, 2010, the value of these securities amounted to $88,449,458 or 7.0% 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 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. Pioneer Bond Fund | Annual Report | 6/30/10 49 Schedule of Investments | 6/30/10 (continued) (a) At June 30, 2010, the net unrealized gain on investments based on cost for federal income tax purposes of $1,248,074,919 was as follows: Aggregate gross unrealized gain for all investments in which there is an excess of value over tax cost $76,741,320 Aggregate gross unrealized loss for all investments in which there is an excess of tax cost over value (30,112,010) ----------- Net unrealized gain $46,629,310 =========== (b) At June 30, 2010, the following securities were out on loan: - ---------------------------------------------------------------------------------------------- Principal Amount ($) Security Value - ---------------------------------------------------------------------------------------------- 1,100,000 BP Capital Markets Plc, 5.25%, 11/7/13 $1,011,230 850,000 Branch Banking & Trust Co., 4.875%, 1/15/13 902,785 400,000 Brocade Communications, 6.875%, 1/15/20 (144A) 397,000 1,000,000 Caterpillar, Inc., 7.9%, 12/15/18 1,285,300 1,719,000 GATX Financial Corp., 6.0%, 2/15/18 1,830,563 400,000 Intergen NV, 9.0%, 6/30/17 398,000 90,000 Petroplus Finance, 7.0%, 5/1/17 (144A) 73,350 1,262,000 Transocean Sedco, 1.625%, 12/15/37 1,222,499 - ---------------------------------------------------------------------------------------------- Total $7,120,727 ============================================================================================== (c) Securities lending collateral is managed by Credit Suisse AG, New York Branch. (d) Debt obligation with a variable interest rate. Rate shown is rate at end of period. (e) Security is in default and is non-income producing. (f) Security is valued using fair value methods (other than prices supplied by independent pricing services). Purchases and sales of securities (excluding temporary cash investments) for the year ended June 30, 2010 were as follows: - -------------------------------------------------------------------------------- Purchases Sales - -------------------------------------------------------------------------------- Long-Term U.S. Government $177,119,970 $270,125,305 Other Long-Term Securities $406,317,585 $188,503,578 Various inputs are used in determining the value of the Fund's investments. These inputs are summarized in the three broad levels listed below. Highest priority is given to Level 1 inputs and lowest priority is given to Level 3. Level 1 -- quoted prices in active markets for identical securities Level 2 -- other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.) Level 3 -- significant unobservable inputs (including the Fund's own assumptions in determining fair value of investments) The accompanying notes are an integral part of these financial statements. 50 Pioneer Bond Fund | Annual Report | 6/30/10 The following is a summary of the inputs used as of June 30, 2010, in valuing the Fund's assets: - ----------------------------------------------------------------------------------------------------------- Level 1 Level 2 Level 3 Total - ----------------------------------------------------------------------------------------------------------- Convertible Corporate Bonds $ -- $ 7,705,331 $ -- $ 7,705,331 Preferred Stocks (Diversified Financials) 4,176,800 -- -- 4,176,800 Preferred Stocks (Insurance) 3,037,550 -- -- 3,037,550 Preferred Stocks (Banks) -- 2,932,750 -- 2,932,750 Preferred Stocks (Real Estate) -- 7,510,600 -- 7,510,600 Common Stock 1,261,110 -- -- 1,261,110 Asset Backed Securities -- 74,326,309 -- 74,326,309 Collateralized Mortgage Obligations -- 225,443,974 232,963 225,676,937 Corporate Bonds -- 494,564,873 -- 494,564,873 U.S. Government Agency Obligations -- 296,655,566 -- 296,655,566 Foreign Government Bonds -- 677,199 -- 677,199 Municipal Bonds -- 12,772,076 -- 12,772,076 Senior Floating Rate Loan Interests -- 97,769,153 -- 97,769,153 Rights/Warrants -- -- -- -- Temporary Cash Investments -- 64,999,707 -- 64,999,707 Money Market Mutual Funds 638,268 -- -- 638,268 - ----------------------------------------------------------------------------------------------------------- Total $9,113,728 $1,285,357,538 $232,963 $1,294,704,229 =========================================================================================================== Following is a reconciliation of assets using significant unobservable inputs (Level 3): - ---------------------------------------------------------------------------------------------------------- Collateralized Asset Backed Mortgage Securities Obligations - ---------------------------------------------------------------------------------------------------------- Balance as of 6/30/09 $ 3,070,286 $132,478 Realized gain (loss)(1) 1,483 -- Change in unrealized appreciation (depreciation)(2) (833,563) 100,485 Net purchases (sales) (66,376) -- Transfers in and out of Level(3) (2,171,830) -- - ---------------------------------------------------------------------------------------------------------- Balance as of 6/30/10 $ -- $232,963 ========================================================================================================== (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. The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/10 51 Statement of Assets and Liabilities | 6/30/10 ASSETS: Investment in securities (including securities loaned of $7,120,727) (cost $1,247,788,510) $1,294,704,229 Cash 8,063,047 Receivables -- Investment securities sold 16,116,678 Fund shares sold 10,532,515 Dividends and interest 11,213,233 Due from Pioneer Investment Management, Inc. 96,668 Other 25,185 - ----------------------------------------------------------------------------------------- Total assets $1,340,751,555 - ----------------------------------------------------------------------------------------- LIABILITIES: Payables -- Investment securities purchased $ 54,201,090 Fund shares repurchased 14,139,220 Dividends 2,042,692 Upon return of securities loaned 7,347,975 Due to affiliates 200,775 Accrued expenses 105,641 - ----------------------------------------------------------------------------------------- Total liabilities $ 78,037,393 - ----------------------------------------------------------------------------------------- NET ASSETS: Paid-in capital $1,247,557,895 Distributed in excess of net investment income (236,147) Accumulated net realized loss on investments (31,523,305) Net unrealized gain on investments 46,915,719 - ----------------------------------------------------------------------------------------- Total net assets $1,262,714,162 ========================================================================================= NET ASSET VALUE PER SHARE: (No par value, unlimited number of shares authorized) Class A (based on $420,706,210/44,554,593 shares) $ 9.44 Class B (based on $27,341,517/2,913,400 shares) $ 9.38 Class C (based on $81,891,734/8,767,461 shares) $ 9.34 Class R (based on $18,185,532/1,909,242 shares) $ 9.52 Class Y (based on $713,868,727/76,271,989 shares) $ 9.36 Class Z (based on $720,442/76,116 shares) $ 9.46 MAXIMUM OFFERING PRICE: Class A ($9.44 [divided by] 95.5%) $ 9.88 ========================================================================================= The accompanying notes are an integral part of these financial statements. 52 Pioneer Bond Fund | Annual Report | 6/30/10 Statement of Operations For the Year Ended 6/30/10 INVESTMENT INCOME: Dividends $ 632,332 Interest 65,665,834 Income from securities loaned, net 76,066 - ----------------------------------------------------------------------------------------- Total investment income $ 66,374,232 - ----------------------------------------------------------------------------------------- EXPENSES: Management fees $5,710,769 Transfer agent fees Class A 374,697 Class B 97,538 Class C 67,657 Class R 4,101 Class Y 129,934 Class Z 249 Distribution fees Class A 883,986 Class B 305,496 Class C 688,633 Class R 88,313 Shareholder communications expense 752,870 Administrative reimbursements 377,327 Custodian fees 45,073 Registration fees 153,649 Professional fees 118,180 Printing expense 95,922 Fees and expenses of nonaffiliated trustees 28,768 Miscellaneous 125,960 - ----------------------------------------------------------------------------------------- Total expenses $ 10,049,122 Less fees waived and expenses reimbursed by Pioneer Investment Management, Inc. (811,656) - ----------------------------------------------------------------------------------------- Net expenses $ 9,237,466 - ----------------------------------------------------------------------------------------- Net investment income $ 57,136,766 - ----------------------------------------------------------------------------------------- REALIZED AND UNREALIZED GAIN ON INVESTMENTS: Net realized gain on investments $ 5,747,467 - ----------------------------------------------------------------------------------------- Change in net unrealized gain on investments $ 93,558,179 - ----------------------------------------------------------------------------------------- Net gain on investments $ 99,305,646 - ----------------------------------------------------------------------------------------- Net increase in net assets resulting from operations $156,442,412 ========================================================================================= The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/10 53 Statements of Changes in Net Assets For the Years Ended 6/30/10 and 6/30/09, respectively - ---------------------------------------------------------------------------------------------------- Year Ended Year Ended 6/30/10 6/30/09 - ---------------------------------------------------------------------------------------------------- FROM OPERATIONS: Net investment income $ 57,136,766 $ 53,558,886 Net realized gain (loss) on investments 5,747,467 (4,267,378) Change in net unrealized gain (loss) on investments 93,558,179 (23,773,754) - ---------------------------------------------------------------------------------------------------- Net increase in net assets resulting from operations $ 156,442,412 $ 25,517,754 - ---------------------------------------------------------------------------------------------------- DISTRIBUTIONS TO SHAREOWNERS: Net investment income: Class A ($0.44 and $0.55 per share, respectively) $ (16,791,891) $ (17,975,138) Class B ($0.34 and $0.47 per share, respectively) (1,152,065) (1,730,327) Class C ($0.35 and $0.48 per share, respectively) (2,598,981) (2,394,084) Class R ($0.41 and $0.53 per share, respectively) (773,008) (800,978) Class Y ($0.45 and $0.58 per share, respectively) (34,242,342) (36,661,955) Class Z ($0.46 and $0.58 per share, respectively) (27,059) (12,170) Net realized gain: Class A ($0.00 and $0.11 per share, respectively) -- (3,453,124) Class B ($0.00 and $0.11 per share, respectively) -- (396,155) Class C ($0.00 and $0.11 per share, respectively) -- (501,217) Class R ($0.00 and $0.11 per share, respectively) -- (153,607) Class Y ($0.00 and $0.11 per share, respectively) -- (6,405,050) Class Z ($0.00 and $0.11 per share, respectively) -- (1,237) - ---------------------------------------------------------------------------------------------------- Total distributions to shareowners $ (55,585,346) $ (70,485,042) - ---------------------------------------------------------------------------------------------------- FROM FUND SHARE TRANSACTIONS: Net proceeds from sale of shares $ 512,301,758 $ 384,747,141 Shares issued in reorganization -- 108,889,002 Reinvestment of distributions 24,975,542 34,561,507 Cost of shares repurchased (385,687,490) (530,397,256) - ---------------------------------------------------------------------------------------------------- Net increase (decrease) in net assets resulting from Fund share transactions $ 151,589,810 $ (2,199,606) - ---------------------------------------------------------------------------------------------------- Net increase (decrease) in net assets $ 252,446,876 $ (47,166,894) NET ASSETS: Beginning of year 1,010,267,286 1,057,434,180 - ---------------------------------------------------------------------------------------------------- End of year $1,262,714,162 $1,010,267,286 - ---------------------------------------------------------------------------------------------------- Distributions in excess of net investment income $ (236,147) $ (2,829,782) - ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 54 Pioneer Bond Fund | Annual Report | 6/30/10 - --------------------------------------------------------------------------------------------------- '10 Shares '10 Amount '09 Shares '09 Amount - --------------------------------------------------------------------------------------------------- Class A Shares sold 21,985,150 $203,489,130 15,553,093 $132,784,018 Shares issued in reorganization -- -- 4,425,282 37,482,135 Reinvestment of distributions 1,317,083 12,121,485 1,731,953 14,470,158 Less shares repurchased (15,830,311) (145,512,861) (13,868,617) (117,130,438) - --------------------------------------------------------------------------------------------------- Net increase 7,471,922 $ 70,097,754 7,841,711 $ 67,605,873 =================================================================================================== Class B Shares sold 726,217 $ 6,600,255 1,505,037 $ 12,681,671 Reinvestment of distributions 99,213 904,650 194,697 1,616,128 Less shares repurchased (1,612,539) (14,702,859) (1,768,893) (14,896,110) - --------------------------------------------------------------------------------------------------- Net decrease (787,109) $ (7,197,954) (69,159) $ (598,311) =================================================================================================== Class C Shares sold 4,303,908 $ 39,005,155 4,636,458 $ 38,745,573 Reinvestment of distributions 180,063 1,639,251 201,354 1,663,357 Less shares repurchased (1,928,805) (17,523,873) (2,594,613) (21,719,772) - --------------------------------------------------------------------------------------------------- Net increase 2,555,166 $ 23,120,533 2,243,199 $ 18,689,158 =================================================================================================== Class R Shares sold 904,665 $ 8,267,967 1,668,291 $ 14,324,093 Reinvestment of distributions 57,659 534,364 94,300 794,045 Less shares repurchased (821,575) (7,571,493) (1,220,449) (10,440,197) - --------------------------------------------------------------------------------------------------- Net increase 140,749 $ 1,230,838 542,142 $ 4,677,941 =================================================================================================== Class Y Shares sold 28,285,000 $254,508,292 22,039,575 $185,940,489 Shares issued in reorganization -- -- 8,500,817 71,406,867 Reinvestment of distributions 1,070,227 9,769,546 1,925,529 16,016,659 Less shares repurchased (22,010,808) (200,233,538) (42,239,439) (366,207,372) - --------------------------------------------------------------------------------------------------- Net increase (decrease) 7,344,419 $ 64,044,300 (9,773,518) $(92,843,357) =================================================================================================== Class Z Shares sold 46,777 $ 430,959 33,110 $ 271,297 Reinvestment of distributions 673 6,246 136 1,160 Less shares repurchased (15,424) (142,866) (404) (3,367) - --------------------------------------------------------------------------------------------------- Net increase 32,026 $ 294,339 32,842 $ 269,090 =================================================================================================== The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/10 55 Financial Highlights - ----------------------------------------------------------------------------------------------------------------------------- Year Year Year Year Year Ended Ended Ended Ended Ended 6/30/10 6/30/09 6/30/08 6/30/07 6/30/06 - ----------------------------------------------------------------------------------------------------------------------------- Class A Net asset value, beginning of period $ 8.63 $ 9.10 $ 8.95 $ 8.89 $ 9.40 - ----------------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income $ 0.45 $ 0.50 $ 0.43 $ 0.40 $ 0.35 Net realized and unrealized gain (loss) on investments 0.80 (0.31) 0.16 0.07 (0.47) - ----------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 1.25 $ 0.19 $ 0.59 $ 0.47 $ (0.12) Distributions to shareowners: Net investment income (0.44) (0.55) (0.44) (0.41) (0.39) Net realized gain -- (0.11) -- -- -- - ----------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 0.81 $ (0.47) $ 0.15 $ 0.06 $ (0.51) - ----------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 9.44 $ 8.63 $ 9.10 $ 8.95 $ 8.89 ============================================================================================================================= Total return* 14.71% 2.65% 6.64% 5.31% (1.25)% Ratio of net expenses to average net assets+ 0.85% 0.89%(a) 1.00% 1.00% 1.00% Ratio of net investment income to average net assets+ 4.86% 5.88% 4.60% 4.48% 3.91% Portfolio turnover rate 41% 34% 73% 31% 60% Net assets, end of period (in thousands) $420,706 $320,036 $265,959 $284,592 $208,454 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Net expenses 1.07% 1.09% 1.04% 1.00% 1.11% Net investment income 4.64% 5.68% 4.56% 4.48% 3.80% Ratios with waiver of fees and assumption of expenses by the Adviser and reduction for fees paid indirectly: Net expenses 0.85% 0.89%(a) 1.00% 1.00% 1.00% Net investment income 4.86% 5.88% 4.60% 4.48% 3.91% ============================================================================================================================= * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period, and no sales charges. Total return would be reduced if sales charges were taken into account. + 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. 56 Pioneer Bond Fund | Annual Report | 6/30/10 - ------------------------------------------------------------------------------------------------------------------------- Year Year Year Year Year Ended Ended Ended Ended Ended 6/30/10 6/30/09 6/30/08 6/30/07 6/30/06 - ------------------------------------------------------------------------------------------------------------------------- Class B Net asset value, beginning of period $ 8.58 $ 9.05 $ 8.90 $ 8.85 $ 9.36 - ------------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income $ 0.35 $ 0.42 $ 0.34 $ 0.33 $ 0.27 Net realized and unrealized gain (loss) on investments 0.79 (0.31) 0.16 0.05 (0.47) - ------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 1.14 $ 0.11 $ 0.50 $ 0.38 $ (0.20) Distributions to shareowners: Net investment income (0.34) (0.47) (0.35) (0.33) (0.31) Net realized gain -- (0.11) -- -- -- - ------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 0.80 $ (0.47) $ 0.15 $ 0.05 $ (0.51) - ------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 9.38 $ 8.58 $ 9.05 $ 8.90 $ 8.85 ========================================================================================================================= Total return* 13.47% 1.62% 5.70% 4.26% (2.14)% Ratio of net expenses to average net assets+ 1.90% 1.90% 1.90% 1.92% 1.90% Ratio of net investment income to average net assets+ 3.89% 4.90% 3.72% 3.55% 3.06% Portfolio turnover rate 41% 34% 73% 31% 60% Net assets, end of period (in thousands) $27,342 $31,738 $34,106 $36,366 $49,552 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Net expenses 1.98% 1.99% 1.90% 2.02% 1.99% Net investment income 3.81% 4.81% 3.72% 3.45% 2.97% Ratios with waiver of fees and assumption of expenses by the Adviser and reduction for fees paid indirectly: Net expenses 1.90% 1.90% 1.89% 1.90% 1.90% Net investment income 3.89% 4.90% 3.73% 3.57% 3.06% ========================================================================================================================= * 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 | 6/30/10 57 Financial Highlights (continued) - ------------------------------------------------------------------------------------------------------------------------ Year Year Year Year Year Ended Ended Ended Ended Ended 6/30/10 6/30/09 6/30/08 6/30/07 6/30/06 - ------------------------------------------------------------------------------------------------------------------------ Class C Net asset value, beginning of period $ 8.54 $ 9.02 $ 8.87 $ 8.81 $ 9.32 - ------------------------------------------------------------------------------------------------------------------------ Increase (decrease) from investment operations: Net investment income $ 0.37 $ 0.42 $ 0.35 $ 0.33 $ 0.28 Net realized and unrealized gain (loss) on investments 0.78 (0.31) 0.16 0.06 (0.47) - ------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) from investment operations $ 1.15 $ 0.11 $ 0.51 $ 0.39 $ (0.19) Distributions to shareowners: Net investment income (0.35) (0.48) (0.36) (0.33) (0.32) Net realized gain -- (0.11) -- -- -- - ------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net asset value $ 0.80 $ (0.48) $ 0.15 $ 0.06 $ (0.51) - ------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $ 9.34 $ 8.54 $ 9.02 $ 8.87 $ 8.81 ======================================================================================================================== Total return* 13.63% 1.62% 5.80% 4.39% (2.08)% Ratio of net expenses to average net assets+ 1.79% 1.83% 1.82% 1.85% 1.89% Ratio of net investment income to average net assets+ 3.91% 4.93% 3.79% 3.62% 3.07% Portfolio turnover rate 41% 34% 73% 31% 60% Net assets, end of period (in thousands) $81,892 $53,045 $35,784 $30,934 $35,942 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Net expenses 1.79% 1.83% 1.82% 1.85% 1.89% Net investment income 3.91% 4.93% 3.79% 3.62% 3.07% Ratios with waiver of fees and assumption of expenses by the Adviser and reduction for fees paid indirectly: Net expenses 1.79% 1.83% 1.82% 1.84% 1.89% Net investment income 3.91% 4.93% 3.79% 3.63% 3.07% ======================================================================================================================== * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period, and no sales charges. Total return would be reduced if sales charges were taken into account. + Ratio with no reduction for fees paid indirectly. The accompanying notes are an integral part of these financial statements. 58 Pioneer Bond Fund | Annual Report | 6/30/10 - ----------------------------------------------------------------------------------------------------------------------- Year Year Year Year Year Ended Ended Ended Ended Ended 6/30/10 6/30/09 6/30/08 6/30/07 6/30/06 - ----------------------------------------------------------------------------------------------------------------------- Class R Net asset value, beginning of period $ 8.71 $ 9.18 $ 9.05 $ 8.99 $ 9.50 - ----------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income $ 0.42 $ 0.48 $ 0.40 $ 0.39 $ 0.34 Net realized and unrealized gain (loss) on investments 0.80 (0.31) 0.15 0.06 (0.47) - ----------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 1.22 $ 0.17 $ 0.55 $ 0.45 $(0.13) Distributions to shareowners: Net investment income (0.41) (0.53) (0.42) (0.39) (0.38) Net realized gain -- (0.11) -- -- -- - ----------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 0.81 $ (0.47) $ 0.13 $ 0.06 $(0.51) - ----------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 9.52 $ 8.71 $ 9.18 $ 9.05 $ 8.99 ======================================================================================================================= Total return* 14.18% 2.35% 6.15% 5.04% (1.43)% Ratio of net expenses to average net assets+ 1.25% 1.25% 1.25% 1.25% 1.25% Ratio of net investment income to average net assets+ 4.50% 5.53% 4.35% 4.24% 3.50% Portfolio turnover rate 41% 34% 73% 31% 60% Net assets, end of period (in thousands) $18,186 $15,404 $11,263 $6,511 $3,042 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Net expenses 1.26% 1.30% 1.31% 1.44% 1.46% Net investment income 4.49% 5.48% 4.30% 4.05% 3.29% Ratios with waiver of fees and assumption of expenses by the Adviser and reduction for fees paid indirectly: Net expenses 1.25% 1.25% 1.25% 1.25% 1.25% Net investment income 4.50% 5.53% 4.35% 4.24% 3.50% ======================================================================================================================= * 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 | 6/30/10 59 Financial Highlights (continued) - ------------------------------------------------------------------------------------------------------------------------- Year Year Year Year Year Ended Ended Ended Ended Ended 6/30/10 6/30/09 6/30/08 6/30/07 6/30/06 - ------------------------------------------------------------------------------------------------------------------------- Class Y Net asset value, beginning of period $ 8.55 $ 9.02 $ 8.88 $ 8.83 $ 9.33 - ------------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income $ 0.47 $ 0.53 $ 0.45 $ 0.44 $ 0.39 Net realized and unrealized gain (loss) on investments 0.79 (0.31) 0.16 0.06 (0.46) - ------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 1.26 $ 0.22 $ 0.61 $ 0.50 $ (0.07) Distributions to shareowners: Net investment income (0.45) (0.58) (0.47) (0.45) (0.43) Net realized gain -- (0.11) -- -- -- - ------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 0.81 $ (0.47) $ 0.14 $ 0.05 $ (0.50) - ------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 9.36 $ 8.55 $ 9.02 $ 8.88 $ 8.83 ========================================================================================================================= Total return* 15.06% 2.95% 6.91% 5.65% (0.77)% Ratio of net expenses to average net assets+ 0.61% 0.63% 0.59% 0.57% 0.58% Ratio of net investment income to average net assets+ 5.13% 6.10% 5.02% 4.89% 4.20% Portfolio turnover rate 41% 34% 73% 31% 60% Net assets, end of period (in thousands) $713,869 $589,661 $710,219 $613,523 $521,480 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Net expenses 0.61% 0.64% 0.61% 0.57% 0.58% Net investment income 5.13% 6.09% 5.00% 4.89% 4.20% Ratios with waiver of fees and assumption of expenses by the Adviser and reduction for fees paid indirectly: Net expenses 0.61% 0.63% 0.59% 0.57% 0.58% Net investment income 5.13% 6.10% 5.02% 4.89% 4.20% ========================================================================================================================= * 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. 60 Pioneer Bond Fund | Annual Report | 6/30/10 - ----------------------------------------------------------------------------------------- Year Year Ended Ended 7/6/07 (a) 6/30/10 6/30/09 to 6/30/08 - ----------------------------------------------------------------------------------------- Class Z Net asset value, beginning of period $ 8.67 $ 9.10 $ 8.89 - ----------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income $ 0.48 $ 0.54 $ 0.45 Net realized and unrealized gain (loss) on investments 0.77 (0.28) 0.22 - ----------------------------------------------------------------------------------------- Net increase from investment operations $ 1.25 $ 0.26 $ 0.67 Distributions to shareowners: Net investment income (0.46) (0.58) (0.46) Net realized gain -- (0.11) -- - ----------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 0.79 $ (0.43) $ 0.21 - ----------------------------------------------------------------------------------------- Net asset value, end of period $ 9.46 $ 8.67 $ 9.10 ========================================================================================= Total return* 14.68% 3.42% 7.63%(b) Ratio of net expenses to average net assets+ 0.63% 0.65% 0.58%** Ratio of net investment income to average net assets+ 5.00% 5.91% 5.00%** Portfolio turnover rate 41% 34% 73% Net assets, end of period (in thousands) $ 720 $ 382 $ 102 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Net expenses 0.63% 0.67% 0.58%** Net investment income 5.00% 5.89% 5.00%** Ratios with waiver of fees and assumption of expenses by the Adviser and reduction for fees paid indirectly: Net expenses 0.63% 0.65% 0.58%** Net investment income 5.00% 5.91% 5.00%** ========================================================================================= (a) Class Z shares were first publicly offered on July 6, 2007. (b) Not annualized. * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, and the complete redemption of the investment at net asset value at the end of each period. ** Annualized. + Ratios with no fees paid indirectly. The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/10 61 Notes to Financial Statements | 6/30/10 1. Organization and Significant Accounting Policies Pioneer Bond Fund (the Fund) is a Delaware statutory trust registered under the Investment Company Act of 1940 as a diversified, open-end management investment company. The investment objectives of the Fund are to seek current income consistent with preservation of capital. The Fund offers five classes of shares designated as Class A, Class C, Class R, Class Y and Class Z shares. Class Z shares were first publicly offered on July 6, 2007. 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 Y or Class Z shares. Class B shares convert to Class A shares approximately eight years after the date of purchase. At times, the Fund's investments may represent industries or industry sectors that are interrelated or have common risks, making it more susceptible to any economic, political, or regulatory developments or other risks affecting those industries and sectors. The Fund's prospectus contains unaudited information regarding the Fund's principal risks. Please refer to that document when considering the Fund's principal risks. The Fund'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 62 Pioneer Bond Fund | Annual Report | 6/30/10 and liabilities at the date of the financial statements, and the reported amounts of income, expenses and gains and losses on investments during the reporting period. Actual results could differ from those estimates. The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements, which are consistent with those policies generally accepted in the investment company industry: A. Security Valuation Security transactions are recorded as of trade date. The net asset value of the Fund is computed once daily, on each day the New York Stock Exchange (NYSE) is open, as of the close of regular trading on the NYSE. Senior 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. For the limited number of senior loans for which no reliable price quotes are available, such senior loans will be valued by Loan Pricing Corporation through the use of pricing matrices to determine valuations. Fixed income securities with remaining maturity of more than sixty days are valued at prices supplied by independent pricing services, which consider such factors as market prices, market events, quotations from one or more brokers, Treasury spreads, yields, maturities and ratings. Valuations may be supplemented by dealers and other sources, as required. Equity securities that have traded on an exchange are valued at the last sale price on the principal exchange where they are traded. Equity securities that have not traded on the date of valuation, or securities for which sale prices are not available, generally are valued using the mean between the last bid and asked prices. Securities or loans for which independent third party pricing services are unable to supply prices or for which market prices and/or quotations are not readily available or are considered to be unreliable are valued using fair value methods pursuant to procedures adopted by the Board of Trustees and may include yield equivalents or a pricing matrix. 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. Thus, the valuation of the Fund's securities may differ from exchange prices. At June 30, 2010, there was one security that was valued using fair value methods (other than securities that were valued using prices supplied by independent pricing services) representing 0.02% of net assets. Inputs used in the valuation of a security using fair value methods include credit ratings, the financial condition of the company, current market conditions and comparable securities. Short-term Pioneer Bond Fund | Annual Report | 6/30/10 63 fixed income securities with remaining maturities of sixty days or less generally are valued at amortized cost. Money market mutual funds are valued at net asset value. Principal amounts of mortgage-backed securities are adjusted for monthly paydowns. Premiums and discounts related to certain mortgage-backed securities are amortized or accreted in proportion to the monthly paydowns. All discounts/premiums on debt securities are accreted/amortized for financial reporting purposes over the life of the respective securities, and such accretion/amortization is included in interest income. Dividend income is recorded on the ex-dividend date, except that certain dividends from foreign securities where the ex-dividend date may have passed are recorded as soon as the Fund becomes aware of the ex-dividend data in the exercise of reasonable diligence. Interest income, including interest on income bearing cash accounts, is recorded on the accrual basis. Dividend and interest income are reported net of unrecoverable foreign taxes withheld at the applicable country rates. Gains and losses on sales of investments are calculated on the identified cost method for both financial reporting and federal income tax purposes. B. Federal Income Taxes It is the Fund's policy to comply with the requirements of the Internal Revenue Code applicable to regulated investment companies and to distribute all of its taxable income and net realized capital gains, if any, to its shareowners. Therefore, no federal income tax provision is required. Tax years for the prior three fiscal years remain subject to examination by tax authorities. The amounts and characterizations of distributions to shareowners for financial reporting purposes are determined in accordance with federal income tax rules. Therefore, the sources of the Fund's distributions may be shown in the accompanying financial statements as from or in excess of net investment income or as from net realized gain on investment transactions, or as from paid-in capital, depending on the type of book/tax differences that may exist. At June 30, 2010, the Fund had a net capital loss carryforward of $33,533,387, of which the following amounts will expire between 2011 and 2017 if not utilized: $1,504,506 in 2011, $209,164 in 2012, $3,069,321 in 2013, $11,368,423 in 2014, $7,681,574 in 2015, $7,590,952 in 2016 and $2,109,447 in 2017. At June 30, 2010, the Fund has reclassified $1,042,215 to decrease distributions in excess of net investment income, $959,467 to increase accumulated net realized loss on investments and $82,748 to decrease paid-in capital, to reflect permanent book/tax differences. The reclassification has no impact 64 Pioneer Bond Fund | Annual Report | 6/30/10 on the net assets of the Fund and presents the Fund's capital accounts on a tax basis. The tax character of distributions paid during the years ended June 30, 2010 and June 30, 2009 was as follows: - -------------------------------------------------------------------------------- 2010 2009 - -------------------------------------------------------------------------------- Distributions paid from: Ordinary income $55,585,346 $59,574,652 Long-term capital gain -- 10,910,390 - -------------------------------------------------------------------------------- Total $55,585,346 $70,485,042 ================================================================================ The following shows the components of distributable earnings on a federal income tax basis at June 30, 2010. - -------------------------------------------------------------------------------- 2010 - -------------------------------------------------------------------------------- Distributable earnings: Undistributed ordinary income $ 1,903,129 Capital loss carryforward (33,533,387) Dividends payable (2,042,692) Unrealized appreciation 48,829,217 - -------------------------------------------------------------------------------- Total $ 15,156,267 ================================================================================ The difference between book-basis and tax-basis unrealized appreciation is attributable to the tax deferral of losses on wash sales, adjustments relating to catastrophe bonds, interest on defaulted bonds, and the tax treatment of premium and amortization. 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 approximately $163,286 in underwriting commissions on the sale of Class A shares during the year ended June 30, 2010. 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 Y and Class Z shares do not pay distribution fees. Shareowners of each class participate in all expenses and fees paid to the transfer agent, Pioneer Investment Management Shareholder Services, Pioneer Bond Fund | Annual Report | 6/30/10 65 Inc. (PIMSS), for its services, which 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 R, Class Y and Class Z shares can reflect different transfer agent and distribution expense rates. E. Repurchase Agreements With respect to repurchase agreements entered into by the Fund, the value of the underlying securities (collateral), including accrued interest, is required to be equal to or in excess of the repurchase price. The collateral for all repurchase agreements is held in safekeeping in the customer-only account of the Fund's custodian or a subcustodian of the Fund. The Fund's investment adviser, Pioneer Investment Management, Inc. (PIM), is responsible for determining that the value of the collateral remains at least equal to the repurchase price. F. Securities Lending The Fund lends securities in its portfolio to certain broker-dealers or other institutional investors. When entering into a securities loan transaction, the Fund typically receives cash collateral from the borrower equal to at least the fair value of the securities loaned, which is invested in temporary investments. Credit Suisse AG, New York Branch, as the Fund's securities lending agent, manages the Fund's securities lending collateral. The income earned on the investment of collateral is shared with the borrower and the lending agent in payment of any rebate due to the borrower with respect to the securities loan, and in compensation for the lending agent's services to the Fund. The Fund also continues to receive payments in lieu of dividends or interest on the securities loaned. Gain or loss on the fair value of the loaned securities that may occur during the term of the loan will be for the account of the Fund. The amount of the collateral is required to be adjusted daily to reflect any price fluctuation in the fair value of the loaned securities. If the required market value of the collateral is less than the fair value of the loaned securities, the borrower is required to deliver additional collateral for the account of the Fund prior to the close of the next business day. The Fund has the right, under the lending agreement, to terminate the loan and recover the securities from the borrower with prior notice. The Fund is required to return the cash collateral to the borrower and could suffer a loss if the value of the collateral, as invested, has declined. 66 Pioneer Bond Fund | Annual Report | 6/30/10 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, 2010, the effective management fee (excluding waivers and/or assumption of expenses) was equal to 0.49% of the Fund's average daily net assets. PIM has contractually agreed to limit ordinary operating expenses to the extent required to reduce Fund expenses to 0.85%, 1.90%, 1.90%, 1.25%, 0.76% and 0.65% of the average daily net assets attributable to Class A, Class B, Class C, Class R, Class Y and Class Z shares, respectively. These expense limitations are in effect through November 1, 2013 for Class A and Class Z shares, through November 1, 2011 for Class B, Class C and Class R shares and through June 1, 2012 for Class Y shares. There can be no assurance that PIM will extend the expense limitation agreement for a class of shares beyond the date referred to above. In addition, under the management and administration agreements, certain other services and costs, including accounting, regulatory reporting, and insurance premiums, are paid by the Fund as administrative reimbursements. Included in "Due to Affiliates" reflected on the Statement of Assets and Liabilities is $18,078 in management fees, administrative costs and certain other reimbursements payable to PIM at June 30, 2010. 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, 2010, such out-of-pocket expenses by class of shares were as follows: - -------------------------------------------------------------------------------- Shareholder Communications: - -------------------------------------------------------------------------------- Class A $496,220 Class B 25,974 Class C 81,129 Class R 29,441 Class Y 120,010 Class Z 96 - -------------------------------------------------------------------------------- Total: $752,870 ================================================================================ Pioneer Bond Fund | Annual Report | 6/30/10 67 Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $176,560 in transfer agent fees and out-of-pocket reimbursements payable to PIMSS at June 30, 2010. 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 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 $6,137 in distribution fees payable to PFD at June 30, 2010. The Fund also has adopted a separate service plan for Class R shares (Service Plan). The Service Plan authorizes the Fund to pay securities dealers, plan administrators or other service organizations that agree to provide certain services to retirement plans or plan participants holding shares of the Fund a service fee of up to 0.25% of the Fund's average daily net assets attributable to Class R shares held by such plans. In addition, redemptions of each class of shares (except Class R, 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 18 months of purchase (within 12 months for purchases made on or after April 1, 2009). 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, 2010, CDSCs in the amount of $114,500 were paid to PFD. 68 Pioneer Bond Fund | Annual Report | 6/30/10 5. Expense Offset Arrangements The Fund has entered into certain expense offset arrangements with PIMSS resulting in a reduction in the Fund's total expenses due to interest earned on cash held by PIMSS. For the year ended June 30, 2010, the Fund's expenses were not reduced under such arrangements. 6. Reorganization Information On May 8, 2009, beneficial owners of Regions Morgan Keegan Select Fixed Income Fund approved a proposed Agreement and Plan of Reorganization that provided for the reorganization listed below. The purpose of this transaction was to combine two funds with similar investment objectives and strategies. This tax-free reorganization was accomplished on May 15, 2009 ("Closing Date"), by exchanging the assets and stated liabilities of Regions Morgan Keegan Select Fixed Income Fund for shares of Pioneer Bond Fund. Shareowners holding Class A, Class C and Class I shares of Regions Morgan Keegan Select Fixed Income Fund received Class A, Class C and Class Y shares, respectively, of Pioneer Bond Fund in the reorganization. The investment portfolio of Regions Morgan Keegan Select Fixed Income Fund, with a fair value of $103,155,802 and an identified cost of $104,563,375 at May 15, 2009, was the principal asset acquired by Pioneer Bond Fund. For financial reporting purposes, assets received and shares issued by Pioneer Bond Fund were recorded at fair value; however, the cost basis of the investments received from Regions Morgan Keegan Select Fixed Income Fund was carried forward to align ongoing reporting of Pioneer Bond Fund's realized and unrealized gains and losses with amounts distributable to shareowners for tax purposes. The following charts show the details of the reorganization as of that Closing Date: - --------------------------------------------------------------------------------------------- Regions Morgan Pioneer Keegan Select Pioneer Bond Fund Fixed Income Fund Bond Fund (Pre-Reorganization) (Pre-Reorganization) (Post-Reorganization) - --------------------------------------------------------------------------------------------- Net Assets Class A $276,477,901 $ 36,518,366 $313,960,037 Class B $ 31,100,916 $ -- $ 31,100,916 Class C $ 48,515,093 $ 963,769 $ 48,515,093 Class R $ 15,664,037 $ -- $ 15,664,037 Class Y/I $518,695,851 $ 71,406,867 $590,102,718 Class Z $ 373,324 $ -- $ 373,324 - --------------------------------------------------------------------------------------------- Total Net Assets $890,827,123 $108,889,002 $999,716,125 - --------------------------------------------------------------------------------------------- Shares Outstanding Class A 32,629,637 4,117,511 37,054,919 Class B 3,692,276 -- 3,692,276 Class C 5,783,455 108,700 5,783,455 Class R 1,830,795 -- 1,830,795 Class Y/I 61,769,449 8,054,285 70,270,266 Class Z 43,870 -- 43,870 Pioneer Bond Fund | Annual Report | 6/30/10 69 - -------------------------------------------------------------------------------------- Regions Morgan Pioneer Keegan Select Pioneer Bond Fund Fixed Income Fund Bond Fund (Pre-Reorganization) (Pre-Reorganization) (Post-Reorganization) - -------------------------------------------------------------------------------------- Shares Issued in Reorganization Class A 4,425,282 Class Y 8,500,817 - --------------------------------------------------------------------------------------- Unrealized Accumulated Depreciation On Loss On Closing Date Closing Date - --------------------------------------------------------------------------------------- Regions Morgan Keegan Select Fixed Income Fund $(1,407,573) $(7,590,952) Since the combined investment portfolios have been managed as a single integrated portfolio since the reorganization was completed, it is not practical to separate the amounts of revenue and earnings of Regions Morgan Keegan Select Fixed Income Fund that have been included in Pioneer Bond Fund's statement of operations since May 15, 2009. 7. Subsequent Events In preparing these financial statements, PIM has evaluated the impact of all events and transactions for potential recognition or disclosure and has determined that there were no subsequent events requiring recognition or disclosure in the financial statements. 70 Pioneer Bond Fund | Annual Report | 6/30/10 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, 2010, 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. Accordingly, we express no such opinion. An audit also includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements and financial highlights, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. Our procedures included confirmation of securities owned as of June 30, 2010, by correspondence with the custodian, brokers and agents or by other appropriate auditing procedures where replies from brokers 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 as of June 30, 2010, 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. /s/ Ernst & Young LLP Boston, Massachusetts August 24, 2010 Pioneer Bond Fund | Annual Report | 6/30/10 71 ADDITIONAL INFORMATION (unaudited) The percentages of the Fund's ordinary income distributions that are exempt from nonresident alien (NRA) tax withholding resulting from qualified interest income and qualified short-term gains were 90.79% and 0%, respectively. 72 Pioneer Bond Fund | Annual Report | 6/30/10 Trustees, Officers and Service Providers Investment Adviser Pioneer Investment Management, Inc. Custodian 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. Trustees and Officers The Fund's Trustees and officers are listed below, 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 58 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. Pioneer Bond Fund | Annual Report | 6/30/10 73 Interested Trustees - ------------------------------------------------------------------------------------------------------------------------------------ Other Directorships Position Held Length of Service and Held by this Trustee Name and Age With the Fund Term of Office Principal Occupation During Past Five Years - ------------------------------------------------------------------------------------------------------------------------------------ John F. Cogan, Jr. (84)* Chairman of the Board, Trustee since 1996. Non-Executive Chairman None Trustee and President Serves until a successor and a director of trustee is elected or Pioneer Investment earlier retirement or Management USA Inc. removal. ("PIM-USA"); Chairman and a director of Pioneer; Chairman and Director of Pioneer Institutional Asset Management, Inc. (since 2006); Director of Pioneer Alternative Investment Management Limited (Dublin); 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. (since 2004); Director of Fiduciary Counseling, Inc.; President and Director of Pioneer Funds Distributor, Inc. ("PFD") (until May 2006); President of all of the Pioneer Funds; and Of Counsel, Wilmer Cutler Pickering Hale and Dorr LLP - ------------------------------------------------------------------------------------------------------------------------------------ Daniel K. Kingsbury (51)* Trustee and Executive Trustee since 2008. Director, CEO and None Vice President Serves until a successor President of PIM-USA trustee is elected or (since February 2007); earlier retirement or Director and President removal. of Pioneer and Pioneer Institutional Asset 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. 74 Pioneer Bond Fund | Annual Report | 6/30/10 Independent Trustees - ------------------------------------------------------------------------------------------------------------------------------------ Other Directorships Position Held Length of Service and Held by this Trustee Name and Age With the Fund Term of Office Principal Occupation During Past Five Years - ------------------------------------------------------------------------------------------------------------------------------------ David R. Bock (66) Trustee Trustee since 2005. Interim Chief Executive Director of Serves until a successor Officer, Oxford Enterprise Community trustee is elected or Analytica, Inc. Investment, Inc. earlier retirement or (privately-held research (privately-held removal. and consulting company) affordable housing (2010 - present); finance com- pany) Managing Partner, (1985 - present); Federal City Capital Director of Oxford Advisors (corporate Analytica, Inc. (2008 advisory services - present); and company) (1997 - 2004 Director of New York and 2008 - present); Mortgage Trust Executive Vice President (publicly-traded and Chief Financial mortgage REIT) (2004 Officer, I-trax, Inc. - 2009) (publicly traded health care services company) (2004 - 2007); and Executive Vice President and Chief Financial Officer, Pedestal Inc. (internet-based mortgage trading company) (2000 - 2002) - ------------------------------------------------------------------------------------------------------------------------------------ Pioneer Bond Fund | Annual Report | 6/30/10 75 - ------------------------------------------------------------------------------------------------------------------------------------ Other Directorships Position Held Length of Service and Held by this Trustee Name and Age With the Fund Term of Office Principal Occupation During Past Five Years - ------------------------------------------------------------------------------------------------------------------------------------ Mary K. Bush (62) Trustee Trustee since 1997. President, Bush Director of Marriott Serves until a successor International, LLC International, Inc. trustee is elected or (international financial (2008 - present); earlier retirement or advisory firm) (1991 - Director of Discover removal. present); Managing Financial Services Director, Federal (credit card issuer Housing Finance Board and electronic (oversight of Federal payment services) Home Loan Bank system) (2007 - present); (1989 - 1991); Vice Former Director of President and Head of Briggs & Stratton Co. International Finance, (engine manufacturer) Federal National (2004 - 2009); Mortgage Association Director of UAL (1988 - 1989); U.S. Corporation (airline Alternate Executive holding company) Director, International (2006 - present); Monetary Fund (1984 - Director of ManTech 1988); Executive International Assistant to Deputy Corporation (national Secretary of the U.S. security, defense, Treasury, U.S. and intelligence Treasury Department technology firm) (1982 - 1984); and Vice (2006 - present); President and Team Member, Board of Leader in Corporate Governors, Investment Banking, Bankers Trust Company Institute Co. (1976 - 1982) (2007 - present); Former Director of Brady Corporation (2000 - 2007); Former Director of Mortgage Guaranty Insurance Corporation (1991 - 2006); Former Director of Millennium Chemicals, Inc. (commodity chemicals) (2002 - 2005); Former Director, R.J. Reynolds Tobacco Holdings, Inc. (tobacco) (1999 - 2005); and Former Director of Texaco, Inc. (1997 - 2001) - ------------------------------------------------------------------------------------------------------------------------------------ 76 Pioneer Bond Fund | Annual Report | 6/30/10 Independent Trustees (continued) - ------------------------------------------------------------------------------------------------------------------------------------ Other Directorships Position Held Length of Service and Held by this Trustee Name and Age With the Fund Term of Office Principal Occupation During Past Five Years - ------------------------------------------------------------------------------------------------------------------------------------ Benjamin M. Friedman (65) Trustee Trustee since 2008. William Joseph Maier Trustee, Mellon Serves until a successor Professor of Political Institutional Funds trustee is elected or Economy, Harvard Investment Trust and earlier retirement or University (1972 - Mellon Institutional removal. present) Funds Master Portfolio (oversaw 17 portfolios in fund complex) (1989 - 2008) - ------------------------------------------------------------------------------------------------------------------------------------ Margaret B.W. Graham (63) Trustee Trustee since 1996. Founding Director, None Serves until a successor Vice-President and trustee is elected or Corporate Secretary, earlier retirement or The Winthrop Group, Inc. removal. (consulting firm) (1982 - present); Desautels Faculty of Management, McGill University (1999 - present); and Manager of Research Operations and Organizational Learning, Xerox PARC, Xerox's Advance Research Center (1990 - 1994) - ------------------------------------------------------------------------------------------------------------------------------------ Thomas J. Perna (59) Trustee Trustee since 2006. Chief Executive Officer, Director, Broadridge Serves until a successor Quadriserv, Inc. Financial Solutions, trustee is elected or (technology products Inc. (investor earlier retirement or for securities lending communications and removal. industry) (2008 - securities processing present); Private provider for investor (2004 - 2008); financial services and Senior Executive industry) (2009 - Vice President, The Bank present); and of New York (financial Director, Quadriserv, and securities services) Inc. (2005 - present) (1986 - 2004) - ------------------------------------------------------------------------------------------------------------------------------------ Marguerite A. Piret (62) Trustee Trustee since 1996. President and Chief Director of New Serves until a successor Executive Officer, America High Income trustee is elected or Newbury, Piret & Fund, Inc. earlier retirement or Company, Inc. (closed-end removal. (investment banking investment company) firm) (1981 - present) (2004 - present); and Member, Board of Governors, Investment Company Institute (2000 - 2006) - ------------------------------------------------------------------------------------------------------------------------------------ Pioneer Bond Fund | Annual Report | 6/30/10 77 Fund Officers - ------------------------------------------------------------------------------------------------------------------------------------ Other Directorships Position Held Length of Service and Held by this Officer Name and Age With the Fund Term of Office Principal Occupation During Past Five Years - ------------------------------------------------------------------------------------------------------------------------------------ Christopher J. Kelley (45) Secretary Since 2010. Serves at Vice President and None the discretion of the Associate General Board. Counsel of Pioneer since January 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 (49) Assistant Secretary Since 2010. Serves at Fund Governance Director None the discretion of the of Pioneer since Board. December 2006 and Assistant Secretary of all the Pioneer Funds since June 2010; Manager -- Fund Governance of Pioneer from December 2003 to November 2006; and Senior Paralegal of Pioneer from January 2000 to November 2003 - ------------------------------------------------------------------------------------------------------------------------------------ Thomas Reyes (47) Assistant Secretary Since 2010. Serves at Counsel of Pioneer since None the discretion of the June 2007 and Assistant Board. Secretary of all the Pioneer Funds since June 2010; Vice President and Counsel at State Street Bank from October 2004 to June 2007 - ------------------------------------------------------------------------------------------------------------------------------------ Mark E. Bradley (50) Treasurer Since 2008. Serves at Vice President -- Fund None the discretion of the Accounting, Board. Administration and Controllership Services of Pioneer; and Treasurer of all of the Pioneer Funds since March 2008; Deputy Treasurer of Pioneer from March 2004 to February 2008; Assistant Treasurer of all of the Pioneer Funds from March 2004 to February 2008; and Treasurer and Senior Vice President, CDC IXIS \ Asset Management Services from 2002 to 2003 - ------------------------------------------------------------------------------------------------------------------------------------ Luis I. Presutti (45) Assistant Treasurer Since 2000. Serves at Assistant Vice President None the discretion of the -- Fund Accounting, Board. Administration and Controllership Services of Pioneer; and Assistant Treasurer of all of the Pioneer Funds - ------------------------------------------------------------------------------------------------------------------------------------ 78 Pioneer Bond Fund | Annual Report | 6/30/10 Fund Officers (continued) - ------------------------------------------------------------------------------------------------------------------------------------ Other Directorships Position Held Length of Service and Held by this Officer Name and Age With the Fund Term of Office Principal Occupation During Past Five Years - ------------------------------------------------------------------------------------------------------------------------------------ Gary Sullivan (52) Assistant Treasurer Since 2002. Serves at Fund Accounting Manager None the discretion of the -- Fund Accounting, Board. Administration and Controllership Services of Pioneer; and Assistant Treasurer of all of the Pioneer Funds - ------------------------------------------------------------------------------------------------------------------------------------ David F. Johnson (30) Assistant Treasurer Since 2009. Serves at Fund Administration None the discretion of the Manager -- Fund Board. Accounting, Administration and Controllership Services since November 2008 and Assistant Treasurer of all of the Pioneer Funds since January 2009; and Client Service Manager -- Institutional Investor Services at State Street Bank from March 2003 to March 2007 - ------------------------------------------------------------------------------------------------------------------------------------ Jean M. Bradley (57) Chief Compliance Since 2010. Serves at Chief Compliance Officer None Officer the discretion of the of Pioneer and of all Board. the Pioneer Funds since March 2010; Director of Adviser and Portfolio Compliance at Pioneer since October 2005; and Senior Compliance Officer for Columbia Management Advisers, Inc. from October 2003 to October 2005 - ------------------------------------------------------------------------------------------------------------------------------------ Pioneer Bond Fund | Annual Report | 6/30/10 79 This page for your notes. 80 Pioneer Bond Fund | Annual Report | 6/30/10 This page for your notes. Pioneer Bond Fund | Annual Report | 6/30/10 81 This page for your notes. 82 Pioneer Bond Fund | Annual Report | 6/30/10 This page for your notes. Pioneer Bond Fund | Annual Report | 6/30/10 83 This page for your notes. 84 Pioneer Bond Fund | Annual Report | 6/30/10 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 FactFoneSM 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: 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 pioneerinvestments.com Securities offered through Pioneer Funds Distributor, Inc. 60 State Street, Boston, MA 02109 Underwriter of Pioneer Mutual Funds, Member SIPC (C) 2010 Pioneer Investments 19398-04-0810 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; (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 of its Form N-1A, totaled approximately $44,286 in 2010 and approximately $44,286 in 2009. (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 There were no audit-related services in 2010 or 2009. (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 $8,290 in 2010 and $8,290 in 2009. (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 services provided to the Fund during the fiscal years ended June 30, 2010 and 2009. (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. 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, 2010 and 2009, 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 $8,290 in 2010 and $8,290 in 2009. (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 27, 2010 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 27, 2010 By (Signature and Title)* /s/ Mark Bradley Mark Bradley, Treasurer Date August 27, 2010 * Print the name and title of each signing officer under his or her signature.