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) Dorothy E. Bourassa, 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, 2008 through December 31, 2008 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 - -------------------------------------------------------------------------------- Semi-Annual Report | December 31, 2008 - -------------------------------------------------------------------------------- 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 41 Notes to Financial Statements 51 Trustees, Officers and Service Providers 58 Pioneer Bond Fund | Semi-Annual Report | 12/31/08 1 President's Letter Dear Shareowner, Stock and bond markets around the globe this year have experienced one of their most tumultuous periods in history. Investors have witnessed volatility of a magnitude that many have never before seen. Distance often provides the best vantage point for perspective. Still, we believe that the benefits of basic investment principles that have stood the test of time -- even in the midst of market turmoil -- cannot be underestimated. First, invest for the long term. The founder of Pioneer Investments, Philip L. Carret, began his investment career during the 1920s. One lesson he learned is that while great prosperity affords an advantageous time for selling stocks, extreme economic slumps can create opportunities for purchase. Indeed, many of our portfolio managers, who follow the value-conscious investing approach of our founder, are looking at recent market conditions as an opportunity to buy companies whose shares we believe have been unjustifiably beaten down by indiscriminate selling, but that we have identified as having strong prospects over time. While investors may be facing a sustained market downturn, we continue to believe that patience, along with staying invested in the market, are important considerations for long-term investors. A second principle is to stay diversified across different types of investments. The global scope of the current market weakness poses challenges for this basic investment axiom. But the turbulence makes now a good time to reassess your portfolio and make sure that your investments continue to meet your needs. We believe you should work closely with your financial advisor to find the mix of stocks, bonds and money market assets that is best aligned to your particular risk tolerance and investment objective. As the investment markets sort through the continuing crisis in the financial industry, we are staying focused on the fundamentals and risk management. With more than 80 years of experience behind us, we have learned how to navigate turbulent markets. At Pioneer Investments, risk management has always been a critical part of our culture -- not just during periods of extraordinary volatility. Our investment process is based on fundamental research, quantitative analysis and active portfolio management. This three-pillared process, which we apply to each of our portfolios, is supported by an integrated 2 Pioneer Bond Fund | Semi-Annual Report | 12/31/08 team approach and is designed to carefully balance risk and reward. While we see potential chances for making money in many corners of the market, it takes research and experience to separate solid investment opportunities from speculation. 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. Thank you for investing with Pioneer. Respectfully, /s/ Daniel K. Kingsbury Daniel K. Kingsbury President and CEO Pioneer Investment Management USA, Inc. 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 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 | Semi-Annual Report | 12/31/08 3 Portfolio Management Discussion | 12/31/08 As a widening credit crisis undermined the health of the U.S. economy, fixed- income investors fled to the relative safety of Treasuries and other high-quality investments during the second half of 2008. Corporate bonds and other fixed-income securities exposed to credit risk performed poorly, especially in the final three months of the year. In the following interview, Kenneth J. Taubes discusses the factors that influenced the performance of Pioneer Bond Fund during the six months ended December 31, 2008. Mr. Taubes, Head of U.S. Portfolio Management at Pioneer Investments, is responsible for the daily management of the Fund. Q How did the Fund perform during the six months ended December 31, 2008? A Pioneer Bond Fund Class A shares had a total return of -5.37% at net asset value during the six months ended December 31, 2008, while the Barclays Capital (formerly Lehman Brothers) Aggregate Bond Index returned 4.07% and the Barclays Capital Government/Credit Bond Index returned 4.68% over the same period. During the same six-month period, the average return for the 173 mutual funds in Lipper's Corporate Debt, A-Rated category was -5.19%. On December 31, 2008, the 30-day SEC yield of the Fund's Class A shares was 6.78%. Q What was the investment environment like during the last six months of 2008? A It was a very challenging period for any fixed-income portfolio that included securities with credit risk. The widespread investor flight to quality, which benefited U.S. Treasuries and other high-grade investments, accelerated during the final six months of the year, particularly over the final quarter of 2008. Fears of recession had first surfaced in late 2007 and continued into the early months of 2008, as a deteriorating credit crisis resulted in less lending, which choked both corporate investments and consumer spending. Unemployment rose, manufacturing activity weakened, housing values declined and consumer spending fell. The crisis only intensified in September when investment bank Lehman Brothers was forced into bankruptcy and several other major financial institutions required emergency government rescues because of their exposures to deteriorating credit. Stocks and corporate bond prices fell precipitously in the final months of the year, particularly in October and November, as major commercial and investment banks teetered on the edge of collapse, economic production contracted and consumer spending plummeted. In response to all the developments, the Federal government acted aggressively. The U.S. Federal Reserve Board (the Fed) lowered short-term interest rates to near-zero, 4 Pioneer Bond Fund | Semi-Annual Report | 12/31/08 while making other policy changes to inject liquidity into the financial system. Congress and the Bush Administration agreed upon a $700 billion financial rescue plan, and the incoming Obama Administration began preparing an additional economic stimulus plan for consideration in 2009. As the economic outlook continued to deteriorate, the yield spreads between corporate bonds and Treasuries widened. Government agency mortgages trailed Treasuries, but outperformed investment-grade corporates, which in turn fared better than high-yield bonds. In this environment, the Fund underperformed the more passive Barclays indices, primarily because of investments in high-yield bonds and bank loans, as the indices had little or no exposure to high-yield debt. Q What were your principal strategies for the Fund during the six months ended December 31, 2008? A Throughout the period, we focused on government agency mortgage-backed securities, principally investing in Ginnie Mae, Fannie Mae and Freddie Mac mortgages. We emphasized them because of their high quality and superior yields to Treasuries. They also carried significantly less credit risk than corporate debt. The Fund had a relatively small position in Treasuries because we thought they were overpriced. As the period progressed and corporate bond prices fell lower following months of underperformance, we began building the Fund's positions in corporate securities, primarily investment-grade debt, where we saw appealing values, especially in light of our assessment of the relative risks. We also established a position for the Fund in non-government agency residential mortgages, where we saw market values falling to extraordinarily low levels that were inconsistent with the default records of those mortgages. At the end of the year, approximately half the Fund's assets remained invested in government agency mortgages, while about 13% of assets were invested in high-yield corporate debt, including bank loans. At December 31, 2008, the average credit quality of Fund holdings was A+. We kept the Fund's average effective duration -- which is a measure of price risk from changes in interest rates -- relatively low, at 3.64 years, as we saw little value in investing in longer-maturity bonds when Treasury yields had fallen to extremely low absolute levels. Q What types of investments had the greatest influence on the Fund's performance during the six-month period ended December 31, 2008? A The Fund's exposure to high-yield debt and its underweight position in Treasuries were the principal factors contributing to underperformance relative to the Barclays bond indices. Investments in both high-yield and investment-grade corporate bonds held back the Fund's relative results, Pioneer Bond Fund | Semi-Annual Report | 12/31/08 5 especially in the final quarter of 2008, when corporate bond values plummeted. Security selection also hurt the Fund's performance, as several of our picks underperformed despite continuing to meet all their debt obligations. In addition, our short duration positioning held back the Fund's relative performance as longer-maturity Treasuries continued to rally in the closing weeks of the period. Among the investments that detracted from the Fund's results were: securities of American General Finance, a subsidiary of American International Group (AIG); Forest City Enterprises, a higher-quality real estate developer; and Sallie Mae, a student loan provider. Asset-backed securities of Domino's, the pizza chain, also underperformed. All these securities continued to meet their debt obligations during the six-month period, however. We also had a very small position in Washington Mutual, which defaulted when the banking company failed, but that investment had a negligible impact on overall Fund performance. The Fund did see good performance from several selections, including: bonds of Constellation Brands, a leading producer and marketer of wines, beer and spirits; and the bank loans to Talecris, a health care services company specializing in processing blood supplies. Q What is your investment outlook? A As we look ahead at the start of 2009, the market prices of high-yield and investment-grade corporate debt have been approaching Depression-like lows. However, we think the actions of the Federal government demonstrate that officials are determined not to repeat the mistakes that preceded the Great Depression of the 1930s. The Fed has eased the flow of money into the credit markets, and the incoming administration has made it clear that stimulating the economy is more important than balancing the budget during an economic crisis. We think that one day we may look back and recognize that this was a period when there were extraordinary opportunities to invest in corporate debt and other securities whose prices reflected an extremely pessimistic view of the economy. We think many of the worst possible scenarios already are factored into the prices of investments such as corporate bonds, bank loans, non-agency mortgages and asset-backed debt. Given the extremely low valuations, we have been increasing the Fund's investments in investment-grade corporates, non-agency mortgages and some selective high-yield bonds, which we think have excellent potential once the economy starts to reverse its downslide and begins to recover. 6 Pioneer Bond Fund | Semi-Annual Report | 12/31/08 Please refer to the Schedule of Investments on pages 18-40 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., FNMA, Freddie Mac) are neither guaranteed nor issued by the U.S. Government. The portfolio may invest in mortgage-backed securities, which during times of fluctuating interest rates may increase or decrease more than other fixed-income securities. Mortgage-backed securities are also subject to pre-payments. At times, the Fund's investments may represent industries or industry sectors that are interrelated or have common risks, making 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 | Semi-Annual Report | 12/31/08 7 Portfolio Summary | 12/31/08 Portfolio Diversification - -------------------------------------------------------------------------------- (As a percentage of total investment portfolio) [THE FOLLOWING DATA WAS REPRESENTED BY A PIE CHART IN THE PRINTED MATERIAL.] U.S. Government and Agency Obligations 41.3% U.S. Corporate Bonds 33.1% Collateralized Mortgage Obligations 10.6% Senior Secured Floating Rate Loan Interests 5.3% Asset Backed Securities 3.7% Temporary Cash Investment 3.1% Municipal Bonds 1.4% Convertible Corporate Bonds 0.9% Preferred Stock 0.6% Portfolio Quality - -------------------------------------------------------------------------------- (As a percentage of total investment portfolio) [THE FOLLOWING DATA WAS REPRESENTED BY A PIE CHART IN THE PRINTED MATERIAL.] Treasury/Agency 53.9% BBB 14.7% BB 9.8% A 9.5% AA 4.8% B & Lower 3.1% AAA 2.8% Commercial Paper 1.4% 10 Largest Holdings - -------------------------------------------------------------------------------- (As a percentage of total long-term holdings)* 1. Federal National Mortgage Association, 5.5%, 4/1/36 2.54% 2. U.S. Treasury Inflation Notes, 0.0%, 11/15/13 1.64 3. Federal National Mortgage Association, 5.0%, 6/1/36 1.03 4. Federal Home Loan Mortgage Corp., 4.5%, 10/1/35 1.01 5. JP Morgan Chase Commercial Mortgage Security Corp., 6.065392%, 4/15/45 0.98 6. LB-UBS Commercial Mortgage, 5.372%, 9/15/39 0.95 7. Federal National Mortgage Association, 5.0%, 2/1/22 0.93 8. Federal National Mortgage Association, 5.5%, 5/1/36 0.84 9. Federal National Mortgage Association, 5.5%, 4/1/36 0.76 10. Federal Home Loan Mortgage Corp., 5.0%, 10/1/20 0.71 * This list excludes temporary cash investments and derivative instruments. The portfolio is actively managed, and current holdings may be different. The holdings listed should not be considered recommendations to buy or sell any security listed. 8 Pioneer Bond Fund | Semi-Annual Report | 12/31/08 Prices and Distributions | 12/31/08 Net Asset Value per Share - -------------------------------------------------------------------------------- Class 12/31/08 6/30/08 A $8.22 $9.10 - -------------------------------------------- B $8.17 $9.05 - -------------------------------------------- C $8.14 $9.02 - -------------------------------------------- R $8.29 $9.18 - -------------------------------------------- Y $8.15 $9.02 - -------------------------------------------- Class 12/31/08 6/30/08 Z $8.22 $9.10 - -------------------------------------------- Distributions per Share: 7/1/08-12/31/08 - -------------------------------------------------------------------------------- Net Investment Short-Term Long-Term Class Income Capital Gains Capital Gains A $ 0.2804 $ -- $ 0.1100 - ---------------------------------------------------------------------- B $ 0.2374 $ -- $ 0.1100 - ---------------------------------------------------------------------- C $ 0.2410 $ -- $ 0.1100 - ---------------------------------------------------------------------- R $ 0.2691 $ -- $ 0.1100 - ---------------------------------------------------------------------- Y $ 0.2947 $ -- $ 0.1100 - ---------------------------------------------------------------------- Z* $ 0.2534 $ -- $ 0.1100 - ---------------------------------------------------------------------- * Class Z shares were first publicly offered on July 6, 2007 Pioneer Bond Fund | Semi-Annual Report | 12/31/08 9 Performance Update | 12/31/08 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 December 31, 2008) - ----------------------------------------------------------------------- Net Asset Public Offering Period Value (NAV) Price (POP) - ----------------------------------------------------------------------- 10 Years 4.28% 3.80% 5 Years 2.62 1.68 1 Year -4.36 -8.62 - ----------------------------------------------------------------------- Expense Ratio (Per prospectus dated November 1, 2008) - ----------------------------------------------------------------------- Gross Net - ----------------------------------------------------------------------- 1.04% 0.85% - ----------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Barclays Capital Pioneer Bond Fund Aggregate Bond Index 12/98 9,550 10,000 9,240 9,918 12/00 10,021 11,071 10,777 12,006 12/02 11,722 13,237 12,760 13,780 12/04 13,488 14,378 13,820 14,727 12/06 14,311 15,365 15,182 16,436 12/08 14,521 17,297 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 4.5% sales charge. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The net expense ratio reflects contractual expense limitations currently in effect through 11/1/13 for Class A 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. 10 Pioneer Bond Fund | Semi-Annual Report | 12/31/08 Performance Update | 12/31/08 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 December 31, 2008) - ------------------------------------------------------------- If If Period Held Redeemed - ------------------------------------------------------------- 10 Years 3.38% 3.38% 5 Years 1.68 1.68 1 Year -5.30 -8.87 - ------------------------------------------------------------- Expense Ratio (Per prospectus dated November 1, 2008) - ------------------------------------------------------------- Gross Net - ------------------------------------------------------------- 1.90% 1.90% - ------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Barclays Capital Pioneer Bond Fund Aggregate Bond Index 12/98 10,000 10,000 9,615 9,918 12/00 10,317 11,071 11,023 12,006 12/02 11,882 13,237 12,826 13,780 12/04 13,444 14,378 13,638 14,727 12/06 13,996 15,365 14,717 16,436 12/08 13,936 17,297 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 for details. 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 11/1/10 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 | Semi-Annual Report | 12/31/08 11 Performance Update | 12/31/08 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 December 31, 2008) - ------------------------------------------------------------- If If Period Held Redeemed - ------------------------------------------------------------- 10 Years 3.33% 3.33% 5 Years 1.74 1.74 1 Year -5.24 -5.24 - ------------------------------------------------------------- Expense Ratio (Per prospectus dated November 1, 2008) - ------------------------------------------------------------- Gross Net - ------------------------------------------------------------- 1.82% 1.82% - ------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Barclays Capital Pioneer Bond Fund Aggregate Bond Index 12/98 10,000 10,000 9,593 9,918 12/00 10,318 11,071 10,974 12,006 12/02 11,817 13,237 12,735 13,780 12/04 13,361 14,378 13,560 14,727 12/06 13,908 15,365 14,648 16,436 12/08 13,880 17,297 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 of 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 11/1/09 for Class B 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 | Semi-Annual Report | 12/31/08 Performance Update | 12/31/08 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 December 31, 2008) - ------------------------------------------------------------- If If Period Held Redeemed - ------------------------------------------------------------- 10 Years 3.94% 3.94% 5 Years 2.35 2.35 1 Year -4.87 -4.87 - ------------------------------------------------------------- Expense Ratio (Per prospectus dated November 1, 2008) - ------------------------------------------------------------- Gross Net - ------------------------------------------------------------- 1.31% 1.25% - ------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Barclays Capital Pioneer Bond Fund Aggregate Bond Index 12/98 10,000 10,000 9,631 9,918 12/00 10,394 11,071 11,122 12,006 12/02 12,037 13,237 13,100 13,780 12/04 13,837 14,378 14,128 14,727 12/06 14,595 15,365 15,466 16,436 12/08 14,713 17,297 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 of 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 of 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 contractual expense limitation currently in effect through 11/1/10 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 | Semi-Annual Report | 12/31/08 13 Performance Update | 12/31/08 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 December 31, 2008) - ------------------------------------------------------------- If If Period Held Redeemed - ------------------------------------------------------------- 10 Years 4.59% 4.59% 5 Years 3.03 3.03 1 Year -4.05 -4.05 - ------------------------------------------------------------- Expense Ratio (Per prospectus dated November 1, 2008) - ------------------------------------------------------------- Gross Net - ------------------------------------------------------------- 0.61% 0.61% - ------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Barclays Capital Pioneer Bond Fund Aggregate Bond Index 12/98 10,000 10,000 9,680 9,918 12/00 10,498 11,071 11,302 12,006 12/02 12,340 13,237 13,488 13,780 12/04 14,345 14,378 14,743 14,727 12/06 15,330 15,365 16,325 16,436 12/08 15,663 17,297 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 Y shares prior to their inception would have been higher. Class A shares are used as a proxy through 9/20/01. Class Y shares are not subject to sales charges and are available for limited groups of eligible investors, including institutional investors. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. 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 | Semi-Annual Report | 12/31/08 Performance Update | 12/31/08 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 December 31, 2008) - ------------------------------------------------------------- If If Period Held Redeemed - ------------------------------------------------------------- 10 Years 4.34% 4.34% 5 Years 2.72 2.72 1 Year -4.11 -4.11 - ------------------------------------------------------------- Expense Ratio (Per prospectus dated November 1, 2008) - ------------------------------------------------------------- Gross Net - ------------------------------------------------------------- 0.65% 0.65% - ------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Barclays Capital Pioneer Bond Fund Aggregate Bond Index 12/98 10,000 10,000 9,680 9,918 12/00 10,498 11,071 11,289 12,006 12/02 12,279 13,237 13,367 13,780 12/04 14,130 14,378 14,478 14,727 12/06 14,992 15,365 15,944 16,436 12/08 15,288 17,297 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 July 6, 2007 would have been higher. 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 contractual expense limitation currently in effect through 11/1/13 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 | Semi-Annual Report | 12/31/08 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 July 1, 2008 through December 31, 2008. 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 7/1/08 - --------------------------------------------------------------------------------------------------------------------------- Ending Account Value $ 946.30 $ 941.20 $ 941.40 $ 944.40 $ 948.50 $ 947.80 (after expenses) on 12/31/08 - --------------------------------------------------------------------------------------------------------------------------- Expenses Paid $ 4.56 $ 9.30 $ 8.81 $ 6.13 $ 3.09 $ 3.09 During Period* - --------------------------------------------------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized expense ratio of 0.93%, 1.90%, 1.80%, 1.25%, 0.63%, 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 184/365 (to reflect the one-half year period). 16 Pioneer Bond Fund | Semi-Annual Report | 12/31/08 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 July 1, 2008 through December 31, 2008. 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 7/1/08 - --------------------------------------------------------------------------------------------------------------------------- Ending Account Value $ 1,020.52 $ 1,015.63 $ 1,016.13 $ 1,018.90 $ 1,022.03 $ 1,022.03 (after expenses) on 12/31/08 - --------------------------------------------------------------------------------------------------------------------------- Expenses Paid $ 4.74 $ 9.65 $ 9.15 $ 6.36 $ 3.21 $ 3.21 During Period* - --------------------------------------------------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized expense ratio of 0.93%, 1.90%, 1.80%, 1.25%, 0.63%, 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 184/365 (to reflect the one-half year period). Pioneer Bond Fund | Semi-Annual Report | 12/31/08 17 Schedule of Investments | 12/31/08 (unaudited) Principal Floating S&P/Moody's Amount Rate (b) Ratings Value CONVERTIBLE CORPORATE BONDS -- 0.9% CONSUMER SERVICES -- 0.2% Casinos & Gaming -- 0.2% $ 2,300,000 BB-/NR Scientific Games Corp., 0.75%, 12/1/24 $ 1,992,375 ------------ Total Consumer Services $ 1,992,375 - --------------------------------------------------------------------------------------------------- HEALTH CARE EQUIPMENT & SERVICES -- 0.2% Health Care Services -- 0.2% 2,570,000 B+/B3 Omnicare, Inc., 3.25%, 12/15/35 $ 1,442,413 ------------ Total Health Care Equipment & Services $ 1,442,413 - --------------------------------------------------------------------------------------------------- BANKS -- 0.2% Regional Banks -- 0.2% 2,100,000 A-/A1 National City Corp., 4.0%, 2/1/11 (c) $ 1,871,625 ------------ Total Banks $ 1,871,625 - --------------------------------------------------------------------------------------------------- TELECOMMUNICATION SERVICES -- 0.3% Integrated Telecommunication Services -- 0.3% 2,800,000 B+/B1 Qwest Communications International, Inc., 3.5%, 11/15/25 $ 2,355,500 ------------ Total Telecommunication Services $ 2,355,500 - --------------------------------------------------------------------------------------------------- TOTAL CONVERTIBLE CORPORATE BONDS (Cost $7,224,513) $ 7,661,913 - --------------------------------------------------------------------------------------------------- PREFERRED STOCKS -- 0.6% DIVERSIFIED FINANCIALS -- 0.4% Diversified Financial Services -- 0.4% 4,880 Bank of America Corp., 7.25%, 12/31/49 $ 3,172,000 ------------ Total Diversified Financials $ 3,172,000 - --------------------------------------------------------------------------------------------------- INSURANCE -- 0.2% Life & Health Insurance -- 0.2% 153,800 Delphi Financial Group, Inc., 7.376%, 5/15/37 $ 1,853,290 ------------ Total Insurance $ 1,853,290 - --------------------------------------------------------------------------------------------------- TOTAL PREFERRED STOCKS (Cost $7,295,844) $ 5,025,290 - --------------------------------------------------------------------------------------------------- ASSET BACKED SECURITIES -- 3.7% MATERIALS -- 0.0% Steel -- 0.0% 347,245 0.00 AAA/Aaa CXHE 2006-A AV2, Floating Rate Note, 6/25/36 $ 332,551 ------------ Total Materials $ 332,551 - --------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 18 Pioneer Bond Fund | Semi-Annual Report | 12/31/08 Principal Floating S&P/Moody's Amount Rate (b) Ratings Value CONSUMER SERVICES -- 0.3% Restaurants -- 0.3% $ 4,535,000 BB/Ba3 Dunkin Brands Master Finance LLC, 8.28%, 6/20/31 (144A) $ 2,923,805 ------------ Total Consumer Services $ 2,923,805 - --------------------------------------------------------------------------------------------------- FOOD & DRUG RETAILING -- 0.3% Food Retail -- 0.3% 5,325,000 BB/Aaa Dominos Pizza Master Issuer LLC, 7.629%, 4/25/37 $ 2,130,000 ------------ Total Food & Drug Retailing $ 2,130,000 - --------------------------------------------------------------------------------------------------- BANKS -- 2.2% Thrifts & Mortgage Finance -- 2.2% 2,150,000 0.00 AAA/Aaa Carrington Mortgage, Floating Rate Note, 10/25/36 $ 1,824,303 1,684,495 0.00 AAA/Aaa CMLTI 2006-WFH2 A2A, Floating Rate Note, 8/25/36 1,253,752 1,875,000 0.00 AA+/Aa1 Countrywide Asset Backed Certificates, Floating Rate Note, 11/25/35 1,617,285 667,038 AAA/Aaa Countrywide Asset-Backed, 5.069%, 2/25/36 614,070 3,395,000 0.00 AA+/Aa1 Countrywide Asset-Backed Certificates, Floating Rate Note, 8/25/35 3,100,976 1,175,000 0.93 AA+/Aa1 Countrywide Asset-Backed Certificates, Floating Rate Note, 10/25/35 965,654 2,203,090 AAA/Aaa FBR Securitization T, 2.76188%, 9/25/35 1,873,129 586,240 0.00 AAA/Aaa Lehman XS Trust., Floating Rate Note, 5/25/46 577,649 5,183,519 A/Baa1 Local Insight Media Finance LLC, 5.88%, 10/23/37 3,881,970 1,620,192 0.52 AAA/Aaa Morgan Stanley Ixis Real Estate, Floating Rate Note, 11/25/36 1,535,915 1,570,501 0.00 AAA/Aaa SASC 2007-BC4 A3, Floating Rate Note, 11/25/37 1,402,614 ------------ $ 18,647,317 ------------ Total Banks $ 18,647,317 - --------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 0.9% Consumer Finance -- 0.3% 1,069,101 0.00 AAA/Aaa Nomura Home Equity Trust, Floating Rate Note, 3/25/36 $ 1,015,516 1,500,000 0.91 AA+/Aa1 RASC 2005-KS7 M1, Floating Rate Note, 8/25/35 1,161,461 ------------ $ 2,176,977 - --------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Semi-Annual Report | 12/31/08 19 Schedule of Investments | 12/31/08 (unaudited) (continued) Principal Floating S&P/Moody's Amount Rate (b) Ratings Value Diversified Financial Services -- 0.1% $ 420,000 0.91 AA/Aa2 Asset Backed Securities Corp., Floating Rate Note, 4/25/35 $ 348,179 212,264 0.00 AAA/Aaa First Franklin Mortgage Loan Asset Backed Certificates, Floating Rate Note, 9/24/34 174,491 ------------ $ 522,670 - --------------------------------------------------------------------------------------------------- Investment Banking & Brokerage -- 0.5% 822,771 0.00 AAA/Aaa GSAMP Trust, Floating Rate Note, 1/25/37 $ 749,682 927,250 0.00 AAA/Aaa GSAMP Trust, Floating Rate Note, 11/25/35 853,433 1,217,527 0.00 A/Aa2 GSAMP Trust, Floating Rate Note, 3/25/35 1,119,864 1,725,000 0.00 AAA/B2 MLMI 2006-AR1 A2C, Floating Rate Note, 3/25/37 1,168,548 ------------ $ 3,891,527 - --------------------------------------------------------------------------------------------------- Specialized Finance -- 0.0% 900,000 0.00 AAA/Aaa SLMA 2004-10 A6B, Floating Rate Note, 4/27/26 $ 747,000 ------------ Total Diversified Financials $ 7,338,174 - --------------------------------------------------------------------------------------------------- TOTAL ASSET BACKED SECURITIES (Cost $38,442,070) $ 31,371,847 - --------------------------------------------------------------------------------------------------- COLLATERALIZED MORTGAGE OBLIGATIONS -- 10.6% MATERIALS -- 0.1% Steel -- 0.1% 120,154,349 AAA/Aaa MSDWC 2000-1345 X, 0.7259%, 9/3/15 $ 1,182,835 ------------ Total Materials $ 1,182,835 - --------------------------------------------------------------------------------------------------- BANKS -- 7.5% Diversified Banks -- 0.1% 1,871,149 AAA/Aa2 RALI 2005-QA10 A41, 5.7412%, 9/25/35 $ 1,034,287 - --------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- 7.4% 1,440,000 AAA/Aaa BanK of America Commercial Mortgage, Inc., 4.877%, 7/10/42 $ 1,204,751 4,370,029 AAA/Ba1 Chase Mortgage Finance Corp., 5.5%, 5/25/37 3,520,125 3,955,416 AAA/Aaa Countrywide Alternative Loan Trust, 6.0%, 6/25/35 2,489,440 3,375,000 AAA/Aaa GMAC Commercial Mortgage Securities, Inc., 4.864%, 12/10/41 2,788,893 2,900,000 AAA/Aaa GS Mortgage Securities Corp., II, 7.12%, 11/18/29 2,774,808 1,266,317 0.00 NR/Aaa IMPAC CMB Trust, Floating Rate Note, 11/25/35 627,333 The accompanying notes are an integral part of these financial statements. 20 Pioneer Bond Fund | Semi-Annual Report | 12/31/08 Principal Floating S&P/Moody's Amount Rate (b) Ratings Value Thrifts & Mortgage Finance -- (continued) $ 10,135,000 AAA/Aaa JP Morgan Chase Commercial Mortgage Security Corp., 6.065392%, 4/15/45 $ 8,085,265 2,600,000 AAA/Aaa JP Morgan Mortgage Trust, 4.5%, 8/25/19 2,128,820 4,045,295 AAA/Aaa JP Morgan Mortgage Trust, 6.0%, 8/25/34 3,557,332 1,750,000 AAA/Aaa JPMCC 2002-C3 B, 5.146%, 7/12/35 1,570,207 1,750,000 AAA/Aaa JPMCC 2004-PNC1 A3, 5.299%, 6/12/41 1,581,631 10,000,000 AAA/Aaa LB-UBS Commercial Mortgage, 5.372%, 9/15/39 7,845,059 1,097,989 AAA/Aaa MASTR Asset Securitization Trust, 5.5%, 11/25/33 962,769 8,510,000 5.70 AAA/Aaa SASC 2007 BHC1 A1, Floating Rate Note, 12/18/49 2,830,171 2,890,000 5.74 AA+/NR SASC 2007 BHC1 A2, Floating Rate Note, 12/18/49 958,989 2,010,000 NR/Ba1 SBA CMBS Trust, 6.709%, 11/15/36 1,366,800 1,435,000 AA/Aa2 T SRA R 2006-1 B, 5.7467%, 10/15/36 875,126 4,470,000 AAA/Aaa TSTAR 2006-1A A, 5.668%, 10/15/36 3,589,445 3,787,250 AAA/Aaa Wachovia Bank Commercial Mortgage Trust, 4.803%, 10/15/41 3,040,079 1,977,233 AAA/Aaa WAMU Mortgage Pass-Through Certificates, 4.5%, 8/25/18 1,559,291 2,921,516 0.00 AAA/Aaa WAMU Mortgage Pass-Through Certificates, Floating Rate Note, 4/25/45 1,379,204 1,450,000 AAA/Aaa WBCMT 2003-C9 B, 5.109%, 12/15/35 1,262,822 3,380,786 AAA/NR Wells Fargo Mortgage Backed Securities 5.0%, 11/25/20 3,199,068 2,821,761 NR/Aaa Wells Fargo Mortgage Backed Securities, 5.0%, 3/25/21 2,049,304 717,986 AAA/Aaa Wells Fargo Mortgage Backed Securities, 5.25%, 12/25/33 742,978 ------------ $ 61,989,710 ------------ Total Banks $ 63,023,997 - --------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 1.8% Diversified Financial Services -- 1.8% 2,127,761 NR/Aaa CMSI 2006-1 3A1, 5.0%, 2/25/36 $ 1,612,040 692,097 AAA/Aaa First Horizon Mortgage Pass- Through Trust, 5.0%, 3/25/18 675,660 1,270,000 NR/Ba1 Global Signal, 7.036%, 2/15/36 (144A) 834,885 331,175 0.00 AAA/Aaa Impac Securities Assets Corp., Floating Rate Note, 11/25/34 164,344 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Semi-Annual Report | 12/31/08 21 Schedule of Investments | 12/31/08 (unaudited) (continued) Principal Floating S&P/Moody's Amount Rate (b) Ratings Value Diversified Financial Services -- (continued) $ 1,656,181 0.00 AAA/Aaa Impac Securities Assets Corp., Floating Rate Note, 5/25/36 $ 1,175,694 2,808,450 AAA/NR J.P. Morgan Alternative Loan Trust, 6.0%, 3/25/36 2,059,179 4,898,824 AAA/AAA Master Alternative Loans Trust, 6.0%, 7/25/34 3,818,021 1,405,622 AAA/Aaa Morgan Stanley Capital I, 5.25%, 12/25/17 1,376,675 426,588 AAA/Aaa Morgan Stanley Capital I, 7.0%, 7/25/33 402,992 919,750 0.00 AAA/Aa3 Residential Accredit Loans, Inc., Floating Rate Note, 9/25/46 726,051 2,444,768 AAA/Aaa Residential Funding Mortgage Securities I, 5.5%, 11/25/35 2,062,797 202,444 AAA/Aaa Salomon Brothers Mortgage Securities, 8.0%, 9/25/30 152,529 575,000 NR/Ba2 Tower 2004-2A F, 6.376%, 12/15/14 434,700 ------------ $ 15,495,567 ------------ Total Diversified Financials $ 15,495,567 - --------------------------------------------------------------------------------------------------- REAL ESTATE -- 0.5% Mortgage Real Estate Investment Trust -- 0.5% 4,318,725 AAA/Aaa CS First Boston Mortgage Security, 3.5%, 7/25/18 $ 3,791,275 722,923 AA/Aa2 CS First Boston Mortgage Security, 7.0%, 5/25/32 409,923 ------------ $ 4,201,198 ------------ Total Real Estate $ 4,201,198 - --------------------------------------------------------------------------------------------------- GOVERNMENT -- 0.7% 741,304 AAA/Aaa Fannie Mae, 5.69%, 1/25/32 $ 755,877 700,421 AAA/Aaa Federal Home Loan Bank, 6.0%, 4/15/32 718,246 5,626 NR/NR Federal National Mortgage Association, 10.3%, 4/25/19 5,922 7,751 NR/NR Federal National Mortgage Association, 10.3%, 4/25/19 9,098 448,762 AAA/Aaa Freddie Mac, 5.0%, 8/15/35 453,399 3,824,108 AAA/Aaa Freddie Mac, 6.1%, 9/15/18 3,823,132 ------------ $ 5,765,674 ------------ Total Government $ 5,765,674 - --------------------------------------------------------------------------------------------------- TOTAL COLLATERALIZED MORTGAGE OBLIGATIONS (Cost $114,853,527) $ 89,669,271 - --------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 22 Pioneer Bond Fund | Semi-Annual Report | 12/31/08 Principal Floating S&P/Moody's Amount Rate (b) Ratings Value CORPORATE BONDS -- 33.3% ENERGY -- 3.0% Integrated Oil & Gas -- 0.1% $ 990,000 BBB+/Baa1 Marathon Oil Corp. 5.9%, 3/15/18 $ 826,813 45,000 BBB/Baa2 Petro-Canada, 4.0%, 7/15/13 38,588 ------------ $ 865,401 - --------------------------------------------------------------------------------------------------- Oil & Gas Drilling -- 0.3% 1,600,000 BBB+/Baa2 Transocean Sedco, 1.5%, 12/15/37 $ 1,296,000 1,275,000 BBB+/Baa2 Transocean Sedco, 1.625%, 12/15/37 1,110,844 ------------ $ 2,406,844 - --------------------------------------------------------------------------------------------------- Oil & Gas Equipment & Services -- 0.1% 1,000,000 0.00 NR/NR Sevan Marine ASA, Floating Rate Note, 5/14/13 (144A) $ 500,900 - --------------------------------------------------------------------------------------------------- Oil & Gas Exploration & Production -- 0.6% 2,180,000 BBB/Baa2 Canadian National Resources, Ltd., 5.9%, 2/1/18 $ 1,883,479 2,181,573 BBB+/NR Gazprom International SA, 7.201%, 2/1/20 1,592,549 1,605,000 A/Aa2 Ras Laffan LNG 3 Co., Ltd., 5.832%, 9/30/16 (144A) 1,194,842 ------------ $ 4,670,870 - --------------------------------------------------------------------------------------------------- Oil & Gas Refining & Marketing -- 0.2% 2,475,000 BBB/Baa1 Spectra Energy Capital, 6.2%, 4/15/18 $ 2,147,681 - --------------------------------------------------------------------------------------------------- Oil & Gas Storage & Transportation -- 1.7% 435,000 BBB-/Baa2 Boardwalk Pipelines LLC, 5.5%, 2/1/17 $ 351,741 1,535,000 BBB/Baa2 Buckeye Partners LP, 6.05%, 1/15/18 1,286,729 1,150,000 B+/B1 Holly Energy Partners LP, 6.25%, 3/1/15 770,500 3,250,000 BBB/Baa2 Kinder Morgan Energy 5.95%, 2/15/18 (c) 2,773,761 2,915,000 BBB-/Baa3 NGPL Pipeco LLC, 6.514%, 12/15/12 (144A) 2,766,390 2,700,000 BBB-/Baa3 Plains All America Pipeline LP, 6.125%, 1/15/17 2,147,016 3,885,000 A-/A3 Questar Pipeline Co., 5.83%, 2/1/18 3,591,286 1,895,000 7.20 BB/Ba1 Southern Union Co., 7.2%, 11/1/66 653,775 ------------ $ 14,341,198 ------------ Total Energy $ 24,932,894 - --------------------------------------------------------------------------------------------------- MATERIALS -- 1.4% Aluminum -- 0.1% 2,290,000 B/B3 Novelis, Inc., 7.25%, 2/15/15 $ 1,328,200 - --------------------------------------------------------------------------------------------------- Commodity Chemicals -- 0.1% 2,000,000 B+/Ba3 Nova Chemicals, Ltd., 6.5%, 1/15/12 (c) $ 830,000 - --------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Semi-Annual Report | 12/31/08 23 Schedule of Investments | 12/31/08 (unaudited) (continued) Principal Floating S&P/Moody's Amount Rate (b) Ratings Value Construction Materials -- 0.1% $ 2,260,000 BB+/NR C8 Capital SPV, Ltd., 6.64%, 12/31/49 (c) $ 1,145,820 - --------------------------------------------------------------------------------------------------- Diversified Metals & Mining -- 0.2% 2,965,000 5.88 BBB-/Ba2 Freeport-McMoran Copper & Gold, Inc., Floating Rate Note, 4/1/15 $ 1,956,900 - --------------------------------------------------------------------------------------------------- Fertilizers & Agricultural Chemicals -- 0.5% 4,510,000 BBB/Baa2 Agrium, Inc., 6.75%, 1/15/19 $ 4,317,188 45,000 A-/Baa1 Potash Corp. Saskatchewan, 4.875%, 3/1/13 42,611 ------------ $ 4,359,799 - --------------------------------------------------------------------------------------------------- Steel -- 0.4% 3,900,000 BBB+/Baa2 ArcelorMittal, 6.125%, 6/1/18 $ 2,670,556 1,230,000 BBB/Baa2 Commercial Metals Co., 7.35%, 8/15/18 984,868 ------------ $ 3,655,424 ------------ Total Materials $ 13,276,143 - --------------------------------------------------------------------------------------------------- CAPITAL GOODS -- 1.4% Aerospace & Defense -- 0.1% 40,000 A+/A2 Boeing Co., 5.125%, 2/15/13 $ 39,961 - --------------------------------------------------------------------------------------------------- Building Products -- 0.1% 2,225,000 6.72 BB+/BBB- C10 Capital SPV Ltd, Floating Rate Note, 12/31/49 $ 1,058,722 - --------------------------------------------------------------------------------------------------- Electrical Component & Equipment -- 0.5% 2,665,000 BB+/Ba1 Anixter International Corp., 5.95%, 3/1/15 $ 2,132,000 2,670,000 BB-/Ba1 Belden CDT, Inc., 7.0%, 3/15/17 2,002,500 ------------ $ 4,134,500 - --------------------------------------------------------------------------------------------------- Trading Companies & Distributors -- 0.7% 5,660,000 BBB+/Baa1 GATX Financial Corp., 6.0%, 2/15/18 $ 5,031,814 3,100,000 BBB-/Baa2 Glencore Funding LLC, 6.0%, 4/15/14 (144A) 1,254,874 ------------ $ 6,286,688 ------------ Total Capital Goods $ 11,519,871 - --------------------------------------------------------------------------------------------------- COMMERCIAL SERVICES & SUPPLIES -- 0.4% Office Services & Supplies -- 0.4% 3,110,000 A/A1 Pitney Bowes, Inc., 5.6%, 3/15/18 $ 3,083,316 ------------ Total Commercial Services & Supplies $ 3,083,316 - --------------------------------------------------------------------------------------------------- TRANSPORTATION -- 1.3% Airlines -- 0.1% 1,158,244 0.00 A-/A2 Southwest Airlines Co., 7.67%, 1/2/14 $ 1,128,593 - --------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 24 Pioneer Bond Fund | Semi-Annual Report | 12/31/08 Principal Floating S&P/Moody's Amount Rate (b) Ratings Value Railroads -- 1.2% $ 2,140,000 BBB/Baa1 Burlington Sante Fe Corp., 5.75%, 3/15/08 $ 2,062,919 3,400,000 BB-/B1 Kansas City Southern Mexico, 7.625%, 12/1/13 2,788,000 5,125,000 BBB/Baa2 Union Pacific Corp., 5.7%, 8/15/18 (c) 4,934,017 ------------ $ 9,784,936 ------------ Total Transportation $ 10,913,529 - --------------------------------------------------------------------------------------------------- AUTOMOBILES & COMPONENTS -- 0.1% Auto Parts & Equipment -- 0.1% 3,255,000 B-/B3 Lear Corp., 8.75%, 12/1/16 $ 943,950 ------------ Total Automobiles & Components $ 943,950 - --------------------------------------------------------------------------------------------------- CONSUMER DURABLES & APPAREL -- 0.4% Household Appliances -- 0.4% 4,235,000 BBB/Baa2 Whirlpool Corp., 5.5%, 3/1/13 $ 3,350,656 ------------ Total Consumer Durables & Apparel $ 3,350,656 - --------------------------------------------------------------------------------------------------- CONSUMER SERVICES -- 0.7% Casinos & Gaming -- 0.0% 1,780,000 C/Ca Station Casinos, Inc., 6.625%, 3/15/18 $ 102,350 - --------------------------------------------------------------------------------------------------- Education Services -- 0.7% 2,470,000 AAA/Aaa President & Fellows of Harvard, 3.7%, 4/1/13 $ 2,436,532 3,095,000 AAA/Aaa President & Fellows of Harvard, 6.3%, 10/1/37 3,341,826 ------------ $ 5,778,358 ------------ Total Consumer Services $ 5,880,708 - --------------------------------------------------------------------------------------------------- MEDIA -- 1.0% Broadcasting -- 0.7% 2,620,000 BBB+/Baa1 Grupo Telivisa SA, 6.0%, 5/15/18 (144A) $ 2,203,158 4,250,000 BB-/B3 Intelsat Sub, 8.5%, 1/15/13 (144A) (c) 3,931,250 ------------ $ 6,134,408 - --------------------------------------------------------------------------------------------------- Cable & Satellite -- 0.3% 1,600,000 BBB/Baa2 British Sky Broadcasting, 6.1%, 2/15/18 (144A) $ 1,313,758 135,000 0.00 BBB+/Baa2 Comcast Corp., 5.3%, 1/15/14 126,243 425,000 BBB+/Baa2 Time Warner Cable, Inc., 8.75%, 2/14/19 462,117 ------------ $ 1,902,118 ------------ Total Media $ 8,036,526 - --------------------------------------------------------------------------------------------------- RETAILING -- 0.4% Department Stores -- 0.0% 25,000 A-/Baa1 Nordstrom, Inc., 5.625%, 1/15/09 $ 25,017 - --------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Semi-Annual Report | 12/31/08 25 Schedule of Investments | 12/31/08 (unaudited) (continued) Principal Floating S&P/Moody's Amount Rate (b) Ratings Value Specialty Stores -- 0.4% $ 3,545,000 B/B3 Sally Holdings, Inc., 9.25%, 11/15/14 (144A) (c) $ 3,048,700 ------------ Total Retailing $ 3,073,717 - --------------------------------------------------------------------------------------------------- FOOD, BEVERAGE & TOBACCO -- 0.9% Agricultural Products -- 0.4% 3,500,000 A/A2 Cargill, Inc., 5.2%, 1/22/13 (144A) $ 3,206,333 - --------------------------------------------------------------------------------------------------- Brewers -- 0.0% 55,000 BBB+/Baa1 Miller Brewing Co., 5.5%, 8/15/13 (144A) $ 51,281 - --------------------------------------------------------------------------------------------------- Distillers & Vintners -- 0.3% 2,765,000 BB-/Ba3 Constellation Brands, Inc., 8.375%, 12/15/14 (c) $ 2,626,750 - --------------------------------------------------------------------------------------------------- Soft Drinks -- 0.0% 55,000 A/A2 Bottling Group LLC, 5.0%, 11/15/13 $ 53,723 - --------------------------------------------------------------------------------------------------- Tobacco -- 0.2% 1,535,000 A/A3 UST, Inc., 5.75%, 3/1/18 $ 1,259,785 ------------ Total Food, Beverage & Tobacco $ 7,197,872 - --------------------------------------------------------------------------------------------------- HEALTH CARE EQUIPMENT & SERVICES -- 0.6% Health Care Facilities -- 0.3% 3,005,000 BB-/B2 HCA, Inc., 9.625%, 11/15/16 $ 2,343,900 - --------------------------------------------------------------------------------------------------- Managed Health Care -- 0.3% 3,275,000 A-/Baa1 United Health Group, Inc., 4.875%, 2/15/13 $ 3,057,619 ------------ Total Health Care Equipment & Services $ 5,401,519 - --------------------------------------------------------------------------------------------------- PHARMACEUTICALS & BIOTECHNOLOGY -- 0.7% Biotechnology -- 0.7% 5,570,000 BBB+/Baa3 Biogen Idec, Inc., 6.0%, 3/1/13 $ 5,509,215 ------------ Total Pharmaceuticals & Biotechnology $ 5,509,215 - --------------------------------------------------------------------------------------------------- BANKS -- 3.5% Diversified Banks -- 1.1% 3,515,000 A+/Aa2 Barclays Plc, 6.05%, 12/4/17 $ 3,100,915 3,520,000 A+/A1 Wachovia Corp., 5.75%, 6/15/17 (c) 3,503,600 2,235,000 AA/Aa1 Wells Fargo Co., 4.375%, 1/31/13 2,188,548 ------------ $ 8,793,063 - --------------------------------------------------------------------------------------------------- Regional Banks -- 2.4% 1,870,000 A/A1 American Express Bank FSB, Ltd., 5.5%, 4/16/13 $ 1,771,339 4,500,000 A+/Aa3 Branch Banking & Trust Co., 4.875%, 1/15/13 4,239,279 1,190,000 A/NR Cobank, ACB, 7.875%, 4/16/18 (144A) 1,202,132 930,000 A-/A2 Keycorp, 6.5%, 5/14/13 857,355 The accompanying notes are an integral part of these financial statements. 26 Pioneer Bond Fund | Semi-Annual Report | 12/31/08 Principal Floating S&P/Moody's Amount Rate (b) Ratings Value Regional Banks -- (continued) $ 2,505,000 A+/Aa3 Mellon Funding Corp., 5.5%, 11/15/18 $ 2,159,425 1,435,000 A+/A1 PNC Bank NA, 6.0%, 12/7/17 1,426,126 1,473,000 8.25 A-/A3 PNC Funding Corp., Floating Rate Note, 5/29/49 1,186,932 2,755,000 BBB/Baa2 Sovereign Bancorp, 8.75%, 5/30/18 2,721,761 3,520,000 A+/Aa3 Wachovia Bank NA, 6.0%, 11/15/17 3,397,948 1,275,000 A+/Aa2 Wells Fargo Capital, 9.75%, 12/29/49 (c) 1,287,750 585,000 BBB/NR Zions Bancorp, 5.5%, 11/16/15 413,717 ------------ $ 20,663,764 ------------ Total Banks $ 29,456,827 - --------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 7.3% Asset Management & Custody Banks -- 1.1% 2,000,000 A+/Aa3 Bank of New York, 4.95%, 3/15/15 $ 1,918,438 3,945,000 A-/A3 Eaton Vance Corp., 6.5%, 10/2/17 3,495,641 4,000,000 A+/A1 State Street Corp., 7.65%, 6/15/10 4,161,760 ------------ $ 9,575,839 - --------------------------------------------------------------------------------------------------- Consumer Finance -- 1.5% 4,435,000 BBB/Baa1 American General Finance, 6.9%, 12/15/17 $ 1,919,348 3,875,000 A+/Aa3 American Honda Finance, 6.7%, 10/1/13 (144A) 3,906,035 2,575,000 A/A2 Caterpillar Financial, 7.05%, 10/1/18 (c) 2,710,260 2,630,000 CCC+/Caa1 Ford Motor Credit Co., 5.7%, 1/15/10 (c) 2,235,053 3,155,000 4.00 BBB-/Baa2 SLM Corp., Floating Rate Note, 7/25/14 1,590,846 ------------ $ 12,361,542 - --------------------------------------------------------------------------------------------------- Diversified Financial Services -- 1.8% 1,450,000 8.40 BBB/Baa2 C VAR, Floating Rate Note, Perpetual $ 957,421 2,575,000 A+/Aa2 JP Morgan Chase & Co., 6.0%, 1/15/18 (c) 2,717,974 4,900,000 A-/A1 JPMorgan Chase & Co., 7.9%, 4/29/49 4,075,967 1,100,000 A/Aa3 Nationsbank Corp., 7.75%, 8/15/15 1,124,927 1,153,920 A-/Baa1 PF Export Receivable Master Trust, 6.436%, 6/1/15 (144A) 1,142,381 1,860,842 BBB/Baa2 Power Receivables Finance LLC, 6.29%, 1/1/12 (144A) 1,822,843 200,000 BB/Baa2 TNK-BP Finance SA, 6.625%, 3/20/17 96,000 1,000,000 BB/Baa2 TNK-BP Finance SA, 6.625%, 3/20/17 (144A) 480,000 2,080,000 BB/Baa2 TNK-BP Finance SA, 7.5%, 7/18/16 (144A) 1,081,600 1,000,000 BB/Baa2 TNK-BP Finance SA, 7.875%, 3/13/18 (144A) 500,000 ------------ $ 13,999,113 - --------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Semi-Annual Report | 12/31/08 27 Schedule of Investments | 12/31/08 (unaudited) (continued) Principal Floating S&P/Moody's Amount Rate (b) Ratings Value Investment Banking & Brokerage -- 1.3% $ 9,740,000 5.79 BBB/A3 Goldman Sachs Capital, Floating Rate Note., 12/29/49 $ 3,744,280 3,325,000 A/A2 Merrill Lynch & Co., 5.45%, 2/5/13 3,196,143 4,765,000 A/A2 Morgan Stanley Dean Witter, 6.625%, 4/1/18 4,180,287 ------------ $ 11,120,710 - --------------------------------------------------------------------------------------------------- Specialized Finance -- 1.6% 5,280,000 BBB+/Baa1 CIT Group, Inc., 7.625%, 11/30/12 $ 4,457,212 5,904,965 NR/Baa3 Coso Geothermal Power, 7.0%, 7/15/26 (144A) 4,930,646 2,500,000 A-/Baa1 International Lease Finance Corp., 6.375%, 3/25/13 1,698,240 2,000,000 A+/A1 National Rural Utilities Corp., 5.45%, 2/1/18 1,775,818 1,075,000 A+/A1 National Rural Utilities Corp., 10.375%, 11/1/18 1,258,189 ------------ $ 14,120,105 ------------ Total Diversified Financials $ 61,177,309 - --------------------------------------------------------------------------------------------------- INSURANCE -- 2.8% Life & Health Insurance -- 0.2% 2,800,000 A+/A3 Prudential Financial, 5.15%, 1/15/13 $ 2,274,306 - --------------------------------------------------------------------------------------------------- Multi-Line Insurance -- 1.0% 4,620,000 BB/Baa3 Liberty Mutual Group, 7.0%, 3/15/37 (144A) $ 2,203,195 3,035,000 BBB-/Baa2 Liberty Mutual Group, 7.3%, 6/15/14 (144A) 2,841,868 650,000 10.75 BB/Baa3 Liberty Mutual Group, Floating Rate Note, 6/15/58 (144A) 357,500 2,650,000 A/A3 Loew Corp., 5.25%, 3/15/16 2,392,274 ------------ $ 7,794,837 - --------------------------------------------------------------------------------------------------- Property & Casualty Insurance -- 1.0% 3,742,000 BB+/Ba2 Ambac Financial Group, Inc., 6.15%, 2/15/37 (c) $ 374,174 5,000,000 BBB-/Baa3 Hanover Insurance Group, Inc., 7.625%, 10/15/25 3,000,000 4,135,000 BB/NR Kingsway America, Inc., 7.5%, 2/1/14 3,445,075 2,270,000 14.00 A/Baa3 MBIA, Inc., Floating Rate Note, 1/15/33 (144A) (c) 1,157,700 ------------ $ 7,976,949 - --------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 28 Pioneer Bond Fund | Semi-Annual Report | 12/31/08 Principal Floating S&P/Moody's Amount Rate (b) Ratings Value Reinsurance -- 0.6% $ 2,150,000 AAA/Aaa Berkshire Hathway, Inc., 5.0%, 8/15/13 $ 2,187,068 4,720,000 BBB+/NA Platinum Underwriters HD, 7.5%, 6/1/17 3,063,936 ------------ $ 5,251,004 ------------ Total Insurance $ 23,297,096 - ------------------------------------------------------------------------------------------------------- REAL ESTATE -- 1.7% Diversified Real Estate Activities -- 0.4% 4,125,000 A-/A2 WEA Finance LLC, 7.125%, 4/15/18 $ 2,926,238 - ------------------------------------------------------------------------------------------------------- Real Estate Operating Companies -- 0.3% 8,180,000 B+/B1 Forest City Enterprises, Inc., 7.625%, 6/1/15 $ 2,863,000 - ------------------------------------------------------------------------------------------------------- Retail Real Estate Investment Trust -- 0.4% 3,470,000 AAA/Aaa Trustreet Properties, Inc., 7.5%, 4/1/15 $ 3,765,134 - ------------------------------------------------------------------------------------------------------- Specialized Real Estate Investment Trust -- 0.6% 4,125,000 BBB-/Baa2 Health Care REIT, Inc., 6.2%, 6/1/16 $ 2,640,000 860,000 BBB-/Baa2 Health Care, Inc., 6.0%, 11/15/13 579,026 935,000 BBB-/Baa2 Health Care, Inc., 8.0%, 9/12/12 801,136 565,000 BBB-/Ba1 Ventas Realty Capital Corp., 7.125%, 6/1/15 (144A) 442,113 ------------ $ 4,462,275 ------------ Total Real Estate $ 14,016,647 - ------------------------------------------------------------------------------------------------------- SOFTWARE & SERVICES -- 0.3% Data Processing & Outsourced Services -- 0.3% 4,845,000 B/B3 First Data Corp., 9.875%, 9/24/15 (144A) (c) $ 2,931,225 ------------ Total Software & Services $ 2,931,225 - ------------------------------------------------------------------------------------------------------- TECHNOLOGY HARDWARE & EQUIPMENT -- 0.6% Electronic Equipment & Instruments -- 0.4% 5,070,000 BBB-/Ba1 Agilent Technologies, Inc., 6.5%, 11/1/17 $ 3,485,133 - ------------------------------------------------------------------------------------------------------- Electronic Manufacturing Services -- 0.2% 2,170,000 BB-/Ba2 Flextronics International, Ltd., 6.5%, 5/15/13 $ 1,714,300 ------------ Total Technology Hardware & Equipment $ 5,199,433 - ------------------------------------------------------------------------------------------------------- SEMICONDUCTORS -- 0.2% Semiconductor Equipment -- 0.2% 3,140,000 BBB/Baa1 Klac Instruments Corp., 6.9%, 5/1/18 $ 2,374,879 ------------ Total Semiconductors $ 2,374,879 - ------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Semi-Annual Report | 12/31/08 29 Schedule of Investments | 12/31/08 (unaudited) (continued) Principal Floating S&P/Moody's Amount Rate (b) Ratings Value TELECOMMUNICATION SERVICES -- 0.8% Integrated Telecommunication Services -- 0.8% $ 1,990,000 BBB-/Baa3 Embarq Corp., 7.082%, 6/1/16 (c) $ 1,532,300 2,100,000 A/A3 Verizon Communications, Inc., 8.75%, 11/1/18 2,463,766 2,725,000 BB/Ba3 Windstream Corp., 8.125%, 8/1/13 (c) 2,507,000 ------------ $ 6,503,066 ------------ Total Telecommunication Services $ 6,503,066 - --------------------------------------------------------------------------------------------------- UTILITIES -- 3.9% Electric Utilities -- 2.6% 980,000 BBB+/Baa2 Commonwealth Edison Co., 6.15%, 9/15/17 $ 911,251 845,617 BBB-/Baa3 Crocket Cogeneration LP, 5.869%, 3/30/25 (144A) 673,204 2,270,000 BBB+/Baa3 Entergy Gulf States, Inc., 5.7%, 6/1/15 2,049,386 1,714,104 BBB-/Baa3 FPL Energy America Wind LLC, 6.639%, 6/20/23 (144A) 1,472,587 647,850 BB-/Ba2 FPL Energy Wind Funding, 6.876%, 6/27/17 (144A) 608,169 1,925,000 BBB+/Baa2 Israel Electric Corp., 7.25%, 1/15/19 (144A) 1,795,351 910,000 BBB/Baa3 Nevada Power Co., 6.5%, 8/1/18 875,527 5,055,000 BBB+/Baa1 NY State Gas and Electric Corp., 6.15%, 12/15/17 (144A) 4,600,535 1,224,826 NR/WR OrCal Geothermal, Inc., 6.21%, 12/30/20 (144A) 1,375,896 2,690,000 BB+/Baa3 Public Service of New Mexico, 7.95%, 5/15/18 2,189,009 500,000 A/A2 Southern California Edison Co., 5.75%, 3/15/14 523,969 2,500,000 CCC/B3 TXU Energy Co., 10.25%, 11/1/15 (c) 1,775,000 3,550,000 BBB+/Baa2 West Penn Power Co., 5.95%, 12/15/17 2,990,705 ------------ $ 21,840,589 - --------------------------------------------------------------------------------------------------- Gas Utilities -- 0.2% 2,450,000 A/Aa3 Nakilat, Inc., 6.267%, 12/31/33 (144A) $ 1,641,721 - --------------------------------------------------------------------------------------------------- Independent Power Producer & Energy Traders -- 1.0% 2,675,000 BB-/Ba3 Intergen NV, 9.0%, 6/30/17 $ 2,193,500 2,105,000 BBB-/Baa3 Kiowa Power Partners LLC, 5.737%, 3/30/21 (144A) 1,611,083 2,610,000 BBB-/Baa3 Panoche Energy Center LLC, 6.885%, 7/31/29 (144A) 2,209,730 2,748,495 BB/Ba2 Tenaska Alabama Partners LP, 7.0%, 6/30/21 (144A) 2,155,744 ------------ $ 8,170,057 - --------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 30 Pioneer Bond Fund | Semi-Annual Report | 12/31/08 Principal Floating S&P/Moody's Amount Rate (b) Ratings Value Multi-Utilities -- 0.1% $ 1,365,000 BB/Ba2 NSG Holdings LLC, 7.75%, 12/15/25 (144A) $ 1,064,700 ------------ Total Utilities $ 32,717,067 - ------------------------------------------------------------------------------------------------- TOTAL CORPORATE BONDS (Cost $342,668,611) $280,793,465 - ------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- 41.5% BANKS -- 0.2% Diversified Banks -- 0.2% 1,460,000 A/Aa3 Korea Development Bank, 5.3%, 1/17/13 $ 1,329,184 ------------ Total Banks $ 1,329,184 - ------------------------------------------------------------------------------------------------- GOVERNMENT -- 41.3% 140,000 AAA/Aaa Fannie Mae, 5.24%, 8/7/18 $ 147,632 31,021,407 AAA/Aaa Federal Home Loan Mortgage Corp., 4.5%, 11/1/18 - 11/1/35 31,656,294 8,729,261 AAA/Aaa Federal Home Loan Mortgage Corp., 5.0%, 10/1/20 - 6/1/35 8,966,417 9,197,922 AAA/Aaa Federal Home Loan Mortgage Corp., 5.5%, 12/1/18 - 11/1/35 9,445,073 18,173,957 AAA/Aaa Federal Home Loan Mortgage Corp., 6.0%, 5/1/17 - 6/1/35 18,767,566 1,523,165 AAA/Aaa Federal Home Loan Mortgage Corp., 6.5%, 3/1/13 - 11/1/33 1,589,193 23,424 AAA/Aaa Federal Home Loan Mortgage Corp., 7.0%, 11/1/30 - 12/1/30 24,617 6,485 AAA/Aaa Federal Home Loan Mortgage Corp., 8.0%, 8/1/31 6,775 2,055 AAA/Aaa Federal Home Loan Mortgage Corp., 8.048%, 10/1/33 2,108 4,454,057 AAA/Aaa Federal National Mortgage Association, 4.0%, 7/1/18 - 3/1/36 4,492,458 21,379,013 AAA/Aaa Federal National Mortgage Association, 4.5%, 4/1/19 - 3/1/37 21,860,964 159,106 AAA/Aaa Federal National Mortgage Association, 4.79%, 12/1/12 161,902 25,611,268 AAA/Aaa Federal National Mortgage Association, 5.0%, 12/1/17 - 6/1/36 26,275,243 68,210,681 AAA/Aaa Federal National Mortgage Association, 5.5%, 9/1/17 - 6/1/36 70,086,511 23,812,927 AAA/Aaa Federal National Mortgage Association, 6.0%, 6/1/16 - 12/1/35 24,575,305 2,324,317 AAA/Aaa Federal National Mortgage Association, 6.5%, 7/1/29 - 7/1/34 2,428,397 2,426,116 AAA/Aaa Federal National Mortgage Association, 7.0%, 3/1/12 - 1/1/32 2,535,806 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Semi-Annual Report | 12/31/08 31 Schedule of Investments | 12/31/08 (unaudited) (continued) Principal Floating S&P/Moody's Amount Rate (b) Ratings Value $ 8,491 AAA/Aaa Federal National Mortgage Association, 7.5%, 8/1/20 - 4/1/30 $ 8,997 47,297 AAA/Aaa Federal National Mortgage Association, 8.0%, 4/1/20 - 5/1/31 50,105 18,201,697 AAA/Aaa Government National Mortgage Association, 4.5%, 7/15/33 - 6/15/38 18,596,581 3,339,716 AAA/Aaa Government National Mortgage Association, 5.0%, 10/15/18 - 4/15/35 3,455,210 23,284,692 AAA/Aaa Government National Mortgage Association, 5.5%, 10/15/17 - 2/15/37 24,096,355 25,228,431 AAA/Aaa Government National Mortgage Association, 6.0%, 4/15/14 - 10/15/36 26,150,866 12,048,321 AAA/Aaa Government National Mortgage Association, 6.5%, 8/15/11 - 7/15/35 12,655,108 1,598,477 AAA/Aaa Government National Mortgage Association, 7.0%, 9/15/11 - 5/15/32 1,689,087 172,448 AAA/Aaa Government National Mortgage Association, 7.5%, 8/15/11 - 12/15/31 182,842 12,104 AAA/Aaa Government National Mortgage Association, 7.75%, 11/15/29 - 2/15/30 12,819 13,833 AAA/Aaa Government National Mortgage Association, 8.0%, 5/15/10 14,469 358,262 AAA/Aaa Government National Mortgage Association, I, 6.0%, 2/15/29 371,638 97,057 AAA/Aaa Government National Mortgage Association, I, 7.0%, 12/15/30 - 3/15/31 102,654 18,330 AAA/Aaa Government National Mortgage Association, I, 7.5%, 10/15/29 19,425 2,398,859 AAA/Aaa Government National Mortgage Association, II, 4.5%, 12/20/34 - 1/20/35 2,426,931 2,203,193 AAA/Aaa Government National Mortgage Association, II, 5.5%, 10/20/19 - 11/20/34 2,281,250 115,471 AAA/Aaa Government National Mortgage Association, II, 6.5%, 2/20/29 - 4/20/29 121,567 494,843 AAA/Aaa Government National Mortgage Association, II, 7.0%, 11/20/28 - 12/20/30 521,312 1,420,000 AAA/Aaa U.S. Treasury Bonds, 3.875%, 5/15/18 1,619,242 1,500,000 AAA/Aaa U.S. Treasury Bonds, 4.25%, 11/15/13 1,711,875 3,750,000 AAA/Aaa U.S. Treasury Bonds, 6.25%, 8/15/23 5,114,648 14,572,000 AAA/Aaa U.S. Treasury Inflation Notes, 0.0%, 11/15/13 13,453,424 The accompanying notes are an integral part of these financial statements. 32 Pioneer Bond Fund | Semi-Annual Report | 12/31/08 Principal Floating S&P/Moody's Amount Rate (b) Ratings Value $ 500,000 AAA/Aaa U.S. Treasury Inflation Notes, 0.0%, 5/15/13 $ 467,624 3,517,440 AAA/Aaa U.S. Treasury Inflation Notes, 2.0%, 1/15/14 3,332,774 1,750,000 AAA/Aaa U.S. Treasury Notes, 3.625%, 5/15/13 1,922,813 625,000 AAA/Aaa U.S. Treasury Notes, 4.0%, 2/15/15 712,109 2,000,000 AAA/Aaa U.S. Treasury Notes, 4.375%, 2/15/38 2,678,750 840,000 AAA/Aaa U.S. Treasury Notes, 5.5%, 8/15/28 1,135,304 450,000 AAA/Aaa U.S. Treasury Notes, 7.875%, 2/15/21 668,813 ------------ Total Government $348,596,853 - --------------------------------------------------------------------------------------------------- TOTAL U.S. GOVERNMENT AND AGENCY OBLIGATIONS (Cost $333,503,413) $349,926,037 - --------------------------------------------------------------------------------------------------- MUNICIPAL BONDS -- 1.4% GOVERNMENT -- 1.4% Municipal Higher Education -- 1.4% 4,380,000 AAA/Aa3 California State University Revenue, 5.0%, 11/1/39 $ 4,033,717 4,600,000 AAA/Aaa Connecticut State Health & Educational, 5.0%, 7/1/42 4,541,074 730,000 AAA/Aaa Houston Higher Education Finance Corp., 5.0%, 5/15/47 685,901 2,350,000 AAA/Aaa New York State Dormitory Authority, 5.0%, 7/1/38 2,328,521 ------------ $ 11,589,213 - --------------------------------------------------------------------------------------------------- Municipal Tobacco -- 0.0% 315,000 AAA/WR Tobacco Settlement Authority Iowa, 6.79%, 6/1/10 $ 319,697 ------------ TOTAL MUNICIPAL BONDS (Cost $11,903,479) $ 11,908,910 - --------------------------------------------------------------------------------------------------- SENIOR SECURED FLOATING RATE LOAN INTERESTS -- 5.4%* ENERGY -- 0.3% Integrated Oil & Gas -- 0.1% 1,795,500 8.00 NR/Ba3 Hudson Products Holdings, Inc., Term Loan, 8/24/15 $ 1,418,445 - --------------------------------------------------------------------------------------------------- Oil & Gas Exploration & Production -- 0.2% 2,930,487 4.34 B+/B2 Calpine Corp., First Priority Term Loan, 3/31,14 $ 2,173,793 ------------ Total Energy $ 3,592,238 - --------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Semi-Annual Report | 12/31/08 33 Schedule of Investments | 12/31/08 (unaudited) (continued) Principal Floating S&P/Moody's Amount Rate (b) Ratings Value MATERIALS -- 0.5% Paper Packaging -- 0.5% $ 2,375,819 5.50 B+/B2 Graham Packaging Co., New Term Loan, 10/7/11 $ 1,730,388 2,955,679 6.72 BB/Ba2 Graphic Packaging International, Inc., Incremental Term, 5/16/14 2,209,370 ------------ $ 3,939,758 ------------ Total Materials $ 3,939,758 - --------------------------------------------------------------------------------------------------- CAPITAL GOODS -- 0.3% Aerospace & Defense -- 0.2% 3,391,757 5.44 B+/Ba3 Aeroflex, Inc., Tranche B-1 Term, 8/15/14 $ 2,136,807 - --------------------------------------------------------------------------------------------------- Construction & Farm Machinery & Heavy Trucks -- 0.1% 912,849 5.56 BB-/Ba3 Accuride Corp., Term Advance, 1/31/12 $ 631,577 ------------ Total Capital Goods $ 2,768,384 - --------------------------------------------------------------------------------------------------- COMMERCIAL SERVICES & SUPPLIES -- 0.2% Environmental & Facilities Services -- 0.2% 2,969,849 4.24 BB-/B2 Synagro Technologies, Inc., Term Loan, 4/2/14 $ 2,004,648 ------------ Total Commercial Services & Supplies $ 2,004,648 - --------------------------------------------------------------------------------------------------- TRANSPORTATION -- 0.1% Air Freight & Couriers -- 0.1% 402,514 3.10 B/Ba2 TNT Logistics, Additional Pre-funded Loan, 11/4/13 $ 249,559 1,214,127 5.05 NR/Ba2 TNT Logistics, U.S. Term Loan, 11/4/13 752,758 ------------ $ 1,002,317 ------------ Total Transportation $ 1,002,317 - --------------------------------------------------------------------------------------------------- AUTOMOBILES & COMPONENTS -- 0.2% Tires & Rubber -- 0.2% 3,440,000 2.22 BB/Ba1 Goodyear Tire & Rubber Co., Second Lien Loan, 4/30/14 $ 2,210,200 ------------ Total Automobiles & Components $ 2,210,200 - --------------------------------------------------------------------------------------------------- CONSUMER DURABLES & APPAREL -- 0.1% Housewares & Specialties -- 0.1% 1,305,128 3.96 BB-/Ba3 Jarden Corp., Term Loan B-3, 1/24/12 $ 1,019,305 ------------ Total Consumer Durables & Apparel $ 1,019,305 - --------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 34 Pioneer Bond Fund | Semi-Annual Report | 12/31/08 Principal Floating S&P/Moody's Amount Rate (b) Ratings Value CONSUMER SERVICES -- 0.2% Casinos & Gaming -- 0.2% $ 1,548,060 5.44 NA/NA Fontaineblue Las Vegas, Initial Term Loan, 6/6/14 $ 445,067 395,128 6.55 BB-/Ba3 Gateway Casinos & Entertainment, Inc., Delayed Draw, 9/30/14 175,832 1,955,885 6.55 BB-/Ba3 Gateway Casinos & Entertainment, Inc., Term Advance, 9/30/14 870,369 ------------ $ 1,491,268 ------------ Total Consumer Services $ 1,491,268 - --------------------------------------------------------------------------------------------------- MEDIA -- 0.2% Broadcasting -- 0.1% 3,300,000 2.71 B-/B2 Univision Communication, Inc., Initial Term Loan, 9/29/14 $ 1,356,666 - --------------------------------------------------------------------------------------------------- Cable & Satellite -- 0.1% 970,446 6.40 B/B3 Knology, Inc., Term Loan, 4/30/12 $ 558,006 ------------ Total Media $ 1,914,672 - --------------------------------------------------------------------------------------------------- RETAILING -- 0.1% Internet Retail -- 0.1% 1,358,000 6.64 BBB-/Ba1 Ticketmaster Corp., Term B Loan, 7/25/14 $ 937,020 ------------ Total Retailing $ 937,020 - --------------------------------------------------------------------------------------------------- HEALTH CARE EQUIPMENT & SERVICES -- 1.3% Health Care Equipment -- 0.4% 4,169,535 5.64 B+/B2 Talecris Biotherapeutics Holdings Corp., First Term Lien, 12/6/13 $ 3,658,767 - --------------------------------------------------------------------------------------------------- Health Care Facilities -- 0.6% 1,709,567 4.45 BB/Ba3 CHS/Community Health Systems, Inc., Funded Term, 7/13/14 $ 1,339,446 87,433 1.80 BB/Ba3 CHS/Community Health Systems, Inc., Delayed Draw, 7/25/14 22,835 2,842,000 3.71 BB+/Ba2 HCA, Inc., Tranche B Term, 11/18/13 2,246,956 1,169,821 4.82 B+/Ba2 Sun Health Care Group, Inc., Term Loan, 4/19/14 807,177 265,517 1.36 B+/Ba2 Sun Health Care Group, Inc., Synthetic LC, 4/21/14 183,207 157,419 3.74 B+/Ba2 Sun Health Care Group, Inc., Delayed Draw, 4/19/14 108,619 ------------ $ 4,708,240 - --------------------------------------------------------------------------------------------------- Health Care Services -- 0.2% 2,829,716 3.71 BB-/Ba3 Catalent Pharma Solutions, Inc., Dollar Term Loan, 4/10/14 $ 1,719,053 - --------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Semi-Annual Report | 12/31/08 35 Schedule of Investments | 12/31/08 (unaudited) (continued) Principal Floating S&P/Moody's Amount Rate (b) Ratings Value Health Care Supplies -- 0.1% $ 1,425,597 4.71 BB-/B1 Bausch & Lomb, Term Loan, 4/24/15 $ 977,552 360,000 3.43 BB-/B1 Bausch & Lomb, Delayed Draw, 4/24/15 148,114 ------------ $ 1,125,666 ------------ Total Health Care Equipment & Services $ 11,211,726 - --------------------------------------------------------------------------------------------------- PHARMACEUTICALS & BIOTECHNOLOGY -- 0.1% Life Sciences Tools & Services -- 0.1% 1,047,375 5.25 BBB-/Baa3 Life Technologies Corp., Term B Facility, 6/11/16 $ 984,533 ------------ Total Pharmaceuticals & Biotechnology $ 984,533 - --------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 0.5% Diversified Financial Services -- 0.5% 5,558,000 4.94 BB/Ba2 Metavante Corp., Term Loan, 11/1/14 $ 4,168,500 ------------ Total Diversified Financials $ 4,168,500 - --------------------------------------------------------------------------------------------------- SOFTWARE & SERVICES -- 0.3% IT Consulting & Other Services -- 0.2% 2,425,253 4.02 BB/Ba3 Sungard Data Systems, Inc., New U.S. Term, 2/28/14 $ 1,675,849 - --------------------------------------------------------------------------------------------------- Systems Software -- 0.1% 1,039,395 6.34 B+/Ba2 Macrovision Solutions Corp., Term Loan, 5/2/13 $ 945,849 ------------ Total Software & Services $ 2,621,698 - --------------------------------------------------------------------------------------------------- SEMICONDUCTORS -- 0.1% Semiconductor Equipment -- 0.1% 330,636 7.07 BB-/Ba1 Flextronics Semiconductor, A-1-A Delayed Draw, 10/1/14 $ 212,709 1,150,614 6.16 BB-/Ba1 Flextronics Semiconductor, A Closing Date Loan, 10/1/14 740,228 ------------ $ 952,937 ------------ Total Semiconductors $ 952,937 - --------------------------------------------------------------------------------------------------- TELECOMMUNICATION SERVICES -- 0.3% Integrated Telecommunication Services -- 0.2% 240,834 4.46 B+/B2 Telesat Canda, U.S. Term II Loan, 10/24/14 $ 166,434 2,803,993 6.10 B+/B2 Telesat Canda, U.S. Term I Loan, 10/24/14 1,937,758 ------------ $ 2,104,192 - --------------------------------------------------------------------------------------------------- Wireless Telecommunication Services -- 0.1% 796,975 3.51 BB-/Ba2 Centennial Cellular, New Term Loan, 2/9/11 $ 761,112 ------------ Total Telecommunication Services $ 2,865,304 - --------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 36 Pioneer Bond Fund | Semi-Annual Report | 12/31/08 Principal Floating S&P/Moody's Amount Rate (b) Ratings Value UTILITIES -- 0.2% Electric Utilities -- 0.2% $ 1,975,000 5.60 BBB-/Ba1 Texas Competitive Electric Holdings, Initial Tranche B-2, 10/10/13 $ 1,378,385 ------------ Total Utilities $ 1,378,385 - ----------------------------------------------------------------------------------------------------- TOTAL SENIOR SECURED FLOATING RATE LOAN INTERESTS (Cost $61,847,027) $ 45,062,893 - ----------------------------------------------------------------------------------------------------- TEMPORARY CASH INVESTMENTS -- 3.1% Securities Lending Collateral -- 3.1% (d) Certificates of Deposit: 605,028 Abbey National Plc, 3.15%, 8/13/09 $ 605,028 604,946 Bank of Nova Scotia, 3.21%, 5/5/09 604,946 966,880 Bank of Scotland NY, 2.92%, 6/5/09 966,880 1,089,050 Barclays Bank, 1.5%, 5/27/09 1,089,050 192,361 Calyon NY, 4.62%, 1/16/09 192,361 1,210,056 CBA, 4.87%, 7/16/09 1,210,056 1,089,050 DNB NOR Bank ASA NY, 3.04%, 6/5/09 1,089,050 1,108,411 Intesa SanPaolo S.p.A., 1.44%, 5/22/09 1,108,411 70,088 NORDEA NY, 4.13%, 4/9/09 70,088 907,542 Royal Bank of Canada NY, 2.7%, 8/7/09 907,542 605,028 Royal Bank of Scotland, 3.06%, 3/5/09 605,028 120,950 Skandinavian Enskilda Bank NY, 3.06%, 2/13/09 120,950 1,210,056 Societe Generale, 3.29%, 9/4/09 1,210,056 1,089,050 Svenska Bank NY, 4.61%, 7/8/09 1,089,050 1,210,056 U.S. Bank NA, 2.25%, 8/24/09 1,210,054 ------------ $ 12,078,550 - ----------------------------------------------------------------------------------------------------- Commercial Paper: 1,188,275 American Honda Finance Corp., 4.95%, 7/14/09 $ 1,188,275 115,305 BBVA U.S., 2.83%, 3/12/09 115,305 605,028 CME Group, Inc., 2.9%, 8/6/09 605,028 604,964 General Electric Capital Corp., 2.86%, 3/16/09 604,964 1,210,056 HSBC Bank, Inc., 2.5%, 8/14/09 1,210,056 605,028 IBM, 2.39%, 9/25/09 605,028 1,089,050 Met Life Global Funding, 3.19%, 6/12/09 1,089,050 1,210,056 Monumental Global Funding, Ltd., 2.5%, 8/17/09 1,210,056 1,089,050 New York Life Global, 2.13%, 09/04/09 1,089,050 1,028,547 Westpac Banking Corp., 2.34%, 6/1/09 1,028,546 ------------ $ 8,745,358 - ----------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Semi-Annual Report | 12/31/08 37 Schedule of Investments | 12/31/08 (unaudited) (continued) Principal Floating S&P/Moody's Amount Rate (b) Ratings Value Tri-party Repurchase Agreements: $ 205,564 Barclays Capital Markets, 0.5%, 1/2/09 $ 205,563 2,662,122 Deutsche Bank, 0.25%, 1/2/09 2,662,122 ------------ $ 2,867,685 - -------------------------------------------------------------------------------------------------- Time Deposit: 1,210,056 BNP Paribas, 0.01%, 1/2/09 $ 1,210,056 - -------------------------------------------------------------------------------------------------- Money Market Mutual Funds: 302,514 Columbia Government Reserves Fund, 0.82%, 1/2/09 $ 302,514 907,542 JP Morgan, U.S. Government Money Market Fund, 0.98%, 1/2/09 907,542 ------------ $ 1,210,056 - -------------------------------------------------------------------------------------------------- TOTAL TEMPORARY CASH INVESTMENTS (Cost $26,111,705) $ 26,111,705 - -------------------------------------------------------------------------------------------------- TOTAL INVESTMENT IN SECURITIES -- 100.5% (Cost $943,850,189) (a) $847,531,331 - -------------------------------------------------------------------------------------------------- OTHER ASSETS AND LIABILITIES -- (0.5)% $ (4,083,901) - -------------------------------------------------------------------------------------------------- TOTAL NET ASSETS -- 100.0% $843,447,430 ================================================================================================== * Senior secured floating rate loan interests in which the Portfolio invests generally pay interest at rates that are periodically redetermined by reference to a base lending rate plus a premium. These baselending rates are generally (i) the lending rate offered by one or more major European banks, such as LIBOR (London InterBank Offered Rate), (ii) the prime rate offered by one or more major United States banks, (iii) the certificate of deposit or (iv) other base lending rates used by commercial lenders. The rate shown is the coupon rate at period end. 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 December 31, 2008, the value of these securities amounted to $66,603,249 or 7.9% of total net assets. (a) At December 31, 2008, the net unrealized loss on investments based on cost for federal income tax purposes of $941,605,319 was as follows: Aggregate gross unrealized gain for all investments in which there is an excess of value over tax cost $ 22,720,567 Aggregate gross unrealized loss for all investments in which there is an excess of tax cost over value (116,794,555) ------------ Net unrealized gain $(94,073,988) ============ (b) Debt obligation with a variable interest rate. Rate shown is rate at period end. The accompanying notes are an integral part of these financial statements. 38 Pioneer Bond Fund | Semi-Annual Report | 12/31/08 (c) At December 31, 2008, the following securities were out on loan: Principal Amount Security Value $ 3,689,000 Ambac Financial Group, Inc., 6.15%, 2/15/37 $ 368,874 2,065,000 C8 Capital SPV, Ltd., 6.64%, 12/31/49 1,046,955 2,156,000 Caterpillar Financial Services Corp., 7.05%, 10/1/18 2,269,251 1,300,000 Constellation Brands, Inc., 8.375%, 12/15/14 1,235,000 187,000 Embarq Corp., 7.082%, 6/1/16 143,990 3,089,000 First Data Corp., 9.875%, 9/24/15 (144A) 1,868,845 2,603,700 Ford Motor Credit Co., 5.7%, 1/15/10 2,212,702 1,720,000 Intelsat Sub, 8.5%, 1/15/13 (144A) 1,591,000 300,000 JP Morgan Chase & Co., 6.0%, 1/15/18 316,657 3,200,000 Kinder Morgan Energy, 5.95%, 2/15/18 2,731,088 2,166,000 MBIA, Inc., Floating Rate Note, 1/15/33 (144A) 1,104,660 1,000,000 National City Corp., 4.0%, 2/1/11 891,250 1,000,000 Nova Chemicals, Ltd., 6.5%, 1/15/12 415,000 3,469,000 Sally Holdings LLC, 9.25%, 11/15/14 (144A) 2,983,340 1,610,000 TXU Energy Co., 10.25%, 11/1/15 1,143,100 1,000,000 Union Pacific Corp., 5.7%, 8/15/18 962,735 1,000,000 Wachovia Corp., 5.75%, 6/15/17 995,341 1,000,000 Wells Fargo Capital, 9.75%, 12/29/49 1,010,000 1,722,000 Windstream Corp., 8.125%, 8/1/13 1,584,240 ---------------------------------------------------------------------------------------- Total $24,874,028 ======================================================================================== (d) Securities lending collateral is managed by Credit Suisse New York Branch. Purchases and sales of securities (excluding temporary cash investments) for the six months ended December 31, 2008, were as follows: Purchases Sales Long-term U.S. Government $49,503,781 $191,251,428 Other Long-term Securities $65,598,779 $ 65,138,513 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. Pioneer Bond Fund | Semi-Annual Report | 12/31/08 39 Schedule of Investments | 12/31/08 (unaudited) (continued) The following is a summary of the inputs used as of December 31, 2008, in valuing the Fund's assets: Investments Valuation Inputs in Securities Level 1 -- Quoted Prices $ 35,989,377 Level 2 -- Other Significant Observable Inputs 807,752,794 Level 3 -- Significant Unobservable Inputs 3,789,160 - -------------------------------------------------------------------------------- Total $847,531,331 ================================================================================ Following is a reconciliation of assets valued using significant unobservable inputs (Level 3): Investments Valuation Inputs in Securities Balance as of 6/30/08 $ -- Realized gain (loss) -- Change in unrealized appreciation (depreciation)(1) (3,847,150) Net purchases (sales) -- Transfers in and out of Level 3 7,636,310 - -------------------------------------------------------------------------------- Balance as of 12/31/08 $3,789,160 ================================================================================ 1 Unrealized appreciation/(depreciation) on these securities is included in the change in net unrealized gain (loss) from investments in the Statement of Operations. The accompanying notes are an integral part of these financial statements. 40 Pioneer Bond Fund | Semi-Annual Report | 12/31/08 Statement of Assets and Liabilities | 12/31/08 (unaudited) ASSETS: Investment in securities (including securities loaned of $24,874,028) (cost $943,850,189) $847,531,331 Cash 24,937,430 Receivables -- Investment securities sold 7,250 Fund shares sold 1,233,525 Dividends, interest and foreign taxes withheld 8,474,984 Due from Pioneer Investment Management, Inc. 94,277 Other 57,030 - --------------------------------------------------------------------------- Total assets $882,335,827 - --------------------------------------------------------------------------- LIABILITIES: Payables -- Investment securities purchased $ 6,412,939 Fund shares repurchased 1,426,953 Dividends 4,230,592 Upon return of securities loaned 26,111,705 Due to affiliates 197,415 Unrealized depreciation on unfunded corporate loans 341,544 Accrued expenses 167,249 - --------------------------------------------------------------------------- Total liabilities $ 38,888,397 - --------------------------------------------------------------------------- NET ASSETS: Paid-in capital $942,910,599 Distributions in excess of net investment income (1,057,540) Accumulated net realized loss on investments (1,745,227) Net unrealized loss on investments (96,660,402) - --------------------------------------------------------------------------- Total net assets $843,447,430 =========================================================================== NET ASSET VALUE PER SHARE: (No par value, unlimited number of shares authorized) Class A (based on $267,325,816/32,536,980 shares) $ 8.22 Class B (based on $29,869,377/3,656,358 shares) $ 8.17 Class C (based on $41,052,919/5,043,665 shares) $ 8.14 Class R (based on $11,702,382/1,410,825 shares) $ 8.29 Class Y $493,404,473/60,570,441 shares) $ 8.15 Class Z (based on $92,463/11,248 shares) $ 8.22 MAXIMUM OFFERING PRICE: Class A ($8.22 [divided by] 95.5%) $ 8.61 =========================================================================== The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Semi-Annual Report | 12/31/08 41 Statement of Operations (unaudited) For the Six Months Ended 12/31/08 INVESTMENT INCOME: Dividends $ 230,254 Interest 29,204,947 Other income 1,401,333 Income from securities loaned, net 223,382 - -------------------------------------------------------------------------------------------- Total investment income $ 31,059,916 - -------------------------------------------------------------------------------------------- EXPENSES: Management fees $ 2,287,902 Transfer agent fees Class A 171,474 Class B 52,538 Class C 23,048 Class R 997 Class Y 74,393 Class Z 20 Distribution fees Class A 338,328 Class B 161,354 Class C 186,399 Class R 30,118 Shareholder communications expense 317,711 Administrative fees 179,043 Custodian fees 40,399 Registration fees 42,486 Professional fees 68,519 Printing expense 23,552 Fees and expenses of nonaffiliated trustees 13,893 Miscellaneous 92,781 - -------------------------------------------------------------------------------------------- Total expenses $ 4,104,955 Less fees waived and expenses reimbursed by Pioneer Investment Management, Inc. (349,385) Less fees paid indirectly (4,257) - -------------------------------------------------------------------------------------------- Net expenses $ 3,751,313 - -------------------------------------------------------------------------------------------- Net investment income $ 27,308,603 - -------------------------------------------------------------------------------------------- REALIZED AND UNREALIZED LOSS ON INVESTMENTS: Net realized loss on investments $ (1,419,552) - -------------------------------------------------------------------------------------------- Change in net unrealized gain (loss) from: Investments $ (74,658,197) Unfunded corporate loans (541,072) $(75,199,269) - -------------------------------------------------------------------------------------------- Net loss on investments $(76,618,821) - -------------------------------------------------------------------------------------------- Net decrease in net assets resulting from operations $(49,310,218) ============================================================================================ The accompanying notes are an integral part of these financial statements. 42 Pioneer Bond Fund | Semi-Annual Report | 12/31/08 Statements of Changes in Net Assets For the Six Months Ended 12/31/08 and the Year Ended 6/30/08, respectively Six Months Ended 12/31/08 Year Ended (unaudited) 6/30/08 FROM OPERATIONS: Net investment income $ 27,308,603 $ 51,825,913 Net realized gain (loss) on investments (1,419,552) 22,626,379 Change in net unrealized gain (loss) on investments (75,199,269) (5,359,675) - --------------------------------------------------------------------------------------------------------- Net increase (decrease) in net assets resulting from operations $ (49,310,218) $ 69,092,617 - --------------------------------------------------------------------------------------------------------- DISTRIBUTIONS TO SHAREOWNERS: Net investment income: Class A ($0.28 and $0.44 per share, respectively) $ (8,727,205) $ (13,384,781) Class B ($0.24 and $0.35 per share, respectively) (877,731) (1,396,309) Class C ($0.24 and $0.36 per share, respectively) (1,066,752) (1,444,779) Class R ($0.27 and $0.42 per share, respectively) (370,355) (415,563) Class Y ($0.29 and $0.47 per share, respectively) (18,865,097) (36,608,750) Class Z ($0.25 and $0.46 per share, respectively) (3,316) (5,199) Net realized gain: Class A ($0.11 and $0.00 per share, respectively) (3,453,124) -- Class B ($0.11 and $0.00 per share, respectively) (396,155) -- Class C ($0.11 and $0.00 per share, respectively) (501,217) -- Class R ($0.11 and $0.00 per share, respectively) (153,608) -- Class Y ($0.11 and $0.00 per share, respectively) (6,405,050) -- Class Z ($0.11 and $0.00 per share, respectively) (1,237) -- - --------------------------------------------------------------------------------------------------------- Total distributions to shareowners $ (40,820,847) $ (53,255,381) - --------------------------------------------------------------------------------------------------------- FROM FUND SHARE TRANSACTIONS: Net proceeds from sale of shares $ 211,239,168 $ 457,654,598 Shares issued in reorganization -- 90,154,588 Reinvestment of distributions 21,539,345 29,121,113 Cost of shares repurchased (356,634,198) (507,259,339) - --------------------------------------------------------------------------------------------------------- Net increase (decrease) in net assets resulting from Fund share transactions $ (123,855,685) $ 69,670,960 - --------------------------------------------------------------------------------------------------------- Net increase (decrease) in net assets $ (213,986,750) $ 85,508,196 NET ASSETS: Beginning of period $1,057,434,180 $ 971,925,984 - --------------------------------------------------------------------------------------------------------- End of period $ 843,447,430 $1,057,434,180 - --------------------------------------------------------------------------------------------------------- Undistributed (distributions in excess of) net investment income $ (1,057,540) $ 1,544,313 - --------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Semi-Annual Report | 12/31/08 43 Statements of Changes in Net Assets (continued) '08 Shares '08 Amount '08 Shares '08 Amount (unaudited) (unaudited) Class A Shares sold 8,657,965 $ 75,473,041 12,106,796 $111,370,558 Reinvestment of distributions 992,883 8,291,337 937,422 8,600,726 Less shares repurchased (6,354,828) (54,654,215) (15,591,016) (143,012,771) - ------------------------------------------------------------------------------------------------------------- Net increase (decrease) 3,296,020 $ 29,110,163 (2,546,798) $(23,041,487) ============================================================================================================= Class B Shares sold 705,187 $ 6,071,739 1,431,526 $ 13,124,674 Reinvestment of distributions 118,150 980,557 117,584 1,072,898 Less shares repurchased (936,647) (8,010,915) (1,863,870) (16,985,938) - ------------------------------------------------------------------------------------------------------------- Net decrease (113,310) $ (958,619) (314,760) $ (2,788,366) ============================================================================================================= Class C Shares sold 2,020,382 $ 17,205,436 2,411,449 $ 21,862,115 Reinvestment of distributions 108,203 891,533 88,577 805,704 Less shares repurchased (1,054,016) (9,020,585) (2,018,254) (18,323,495) - ------------------------------------------------------------------------------------------------------------- Net increase 1,074,569 $ 9,076,384 481,772 $ 4,344,324 ============================================================================================================= Class R Shares sold 618,011 $ 5,482,513 1,111,634 $ 10,336,628 Reinvestment of distributions 55,502 466,952 37,244 345,439 Less shares repurchased (489,039) (4,253,950) (642,234) (5,949,196) - ------------------------------------------------------------------------------------------------------------- Net increase 184,474 $ 1,695,515 506,644 $ 4,732,871 ============================================================================================================= Class Y Shares sold 12,467,301 $ 107,006,355 33,131,515 $300,860,623 Shares issued in reorganization -- -- 9,939,866 90,154,588 Reinvestment of distributions 1,305,855 10,908,966 2,008,520 18,296,346 Less shares repurchased (31,903,803) (280,694,454) (35,477,686) (322,987,939) - ------------------------------------------------------------------------------------------------------------- Net increase (decrease) (18,130,647) $(162,779,133) 9,602,215 $ 86,323,618 ============================================================================================================= Class Z Shares sold 9 $ 84 11,249 $ 100,000 Less shares repurchased (9) (79) -- -- - ------------------------------------------------------------------------------------------------------------- Net increase -- $ 5 11,249 $ 100,000 ============================================================================================================= The accompanying notes are an integral part of these financial statements. 44 Pioneer Bond Fund | Semi-Annual Report | 12/31/08 Financial Highlights Six Months Ended Year 12/31/08 Ended (unaudited) 6/30/08 Class A Net asset value, beginning of period $ 9.10 $ 8.95 - ------------------------------------------------------------------------------------------------------ Increase (decrease) from investment operations: Net investment income $ 0.25 $ 0.43 Net realized and unrealized gain (loss) on investments (0.74) 0.16 - ------------------------------------------------------------------------------------------------------ Net increase (decrease) from investment operations $ (0.49) $ 0.59 Distributions to shareowners: Net investment income (0.28) (0.44) Net realized gain (0.11) -- - ------------------------------------------------------------------------------------------------------ Net increase (decrease) in net asset value $ (0.88) $ 0.15 - ------------------------------------------------------------------------------------------------------ Net asset value, end of period $ 8.22 $ 9.10 ====================================================================================================== Total return* (5.37)% 6.64% Ratio of net expenses to average net assets+ 0.93%** 1.00% Ratio of net investment income to average net assets+ 5.89%** 4.60% Portfolio turnover rate 25%** 73% Net assets, end of period (in thousands) $267,325 $265,959 Ratios with no assumption of expenses by PIM and no reduction for fees paid indirectly: Net expenses 1.08%** 1.04% Net investment income 5.74%** 4.56% Ratios with assumption of expenses by PIM and reduction for fees paid indirectly: Net expenses 0.93%** 1.00% Net investment income 5.89%** 4.60% - ------------------------------------------------------------------------------------------------------ Year Year Year Year Ended Ended Ended Ended 6/30/07 6/30/06 6/30/05 6/30/04 Class A Net asset value, beginning of period $ 8.89 $ 9.40 $ 9.18 $ 9.41 - -------------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income $ 0.40 $ 0.35 $ 0.40 $ 0.41 Net realized and unrealized gain (loss) on investments 0.07 (0.47) 0.29 (0.14) - -------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 0.47 $ (0.12) $ 0.69 $ 0.27 Distributions to shareowners: Net investment income (0.41) (0.39) (0.47) (0.50) Net realized gain -- -- -- -- - -------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 0.06 $ (0.51) $ 0.22 $ (0.23) - -------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 8.95 $ 8.89 $ 9.40 $ 9.18 ========================================================================================================================== Total return* 5.31% (1.25)% 7.64% 2.98% Ratio of net expenses to average net assets+ 1.00% 1.00% 1.05% 1.14% Ratio of net investment income to average net assets+ 4.48% 3.91% 4.27% 4.42% Portfolio turnover rate 31% 60% 49% 63% Net assets, end of period (in thousands) $284,592 $208,454 $174,055 $160,421 Ratios with no assumption of expenses by PIM and no reduction for fees paid indirectly: Net expenses 1.00% 1.11% 1.18% 1.14% Net investment income 4.48% 3.80% 4.14% 4.42% Ratios with assumption of expenses by PIM and reduction for fees paid indirectly: Net expenses 1.00% 1.00% 1.05% 1.14% Net investment income 4.48% 3.91% 4.27% 4.42% - -------------------------------------------------------------------------------------------------------------------------- * 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. ** Annualized. The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Semi-Annual Report | 12/31/08 45 Financial Highlights (continued) Six Months Ended Year 12/31/08 Ended (unaudited) 6/30/08 Class B Net asset value, beginning of period $ 9.05 $ 8.90 - ---------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income $ 0.21 $ 0.34 Net realized and unrealized gain (loss) on investments (0.74) 0.16 - ---------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ (0.53) $ 0.50 Distributions to shareowners: Net investment income (0.24) (0.35) Net realized gain (0.11) -- - ---------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ (0.88) $ 0.15 - ---------------------------------------------------------------------------------------------------- Net asset value, end of period $ 8.17 $ 9.05 ==================================================================================================== Total return* (5.88)% 5.70% Ratio of net expenses to average net assets+ 1.90%** 1.90% Ratio of net investment income to average net assets+ 4.91%** 3.72% Portfolio turnover rate 25%** 73% Net assets, end of period (in thousands) $ 29,869 $ 34,106 Ratios with no assumption of expenses by PIM and no reduction for fees paid indirectly: Net expenses 1.97%** 1.90% Net investment income 4.85%** 3.72% Ratios with assumption of expenses by PIM and reduction for fees paid indirectly: Net expenses 1.90%** 1.89% Net investment income 4.91%** 3.73% ==================================================================================================== Year Year Year Year Ended Ended Ended Ended 6/30/07 6/30/06 6/30/05 6/30/04 Class B Net asset value, beginning of period $ 8.85 $ 9.36 $ 9.14 $ 9.37 - -------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income $ 0.33 $ 0.27 $ 0.32 $ 0.33 Net realized and unrealized gain (loss) on investments 0.05 (0.47) 0.28 (0.14) - -------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 0.38 $ (0.20) $ 0.60 $ 0.19 Distributions to shareowners: Net investment income (0.33) (0.31) (0.38) (0.42) Net realized gain -- -- -- -- - -------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 0.05 $ (0.51) $ 0.22 $ (0.23) - -------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 8.90 $ 8.85 $ 9.36 $ 9.14 ==================================================================================================================== Total return* 4.26% (2.14)% 6.72% 2.04% Ratio of net expenses to average net assets+ 1.92% 1.90% 1.95% 1.98% Ratio of net investment income to average net assets+ 3.55% 3.06% 3.39% 3.55% Portfolio turnover rate 31% 60% 49% 63% Net assets, end of period (in thousands) $36,366 $49,552 $56,828 $57,774 Ratios with no assumption of expenses by PIM and no reduction for fees paid indirectly: Net expenses 2.02% 1.99% 2.02% 1.98% Net investment income 3.45% 2.97% 3.32% 3.55% Ratios with assumption of expenses by PIM and reduction for fees paid indirectly: Net expenses 1.90% 1.90% 1.95% 1.98% Net investment income 3.57% 3.06% 3.39% 3.55% - -------------------------------------------------------------------------------------------------------------------- * 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. ** Annualized. The accompanying notes are an integral part of these financial statements. 46 Pioneer Bond Fund | Semi-Annual Report | 12/31/08 Six Months Ended Year 12/31/08 Ended (unaudited) 6/30/08 Class C Net asset value, beginning of period $ 9.02 $ 8.87 - ----------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income $ 0.21 $ 0.35 Net realized and unrealized gain (loss) on investments (0.74) 0.16 - ----------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ (0.53) $ 0.51 Distributions to shareowners: Net investment income (0.24) (0.36) Net realized gain (0.11) -- - ----------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ (0.88) $ 0.15 - ----------------------------------------------------------------------------------------------------- Net asset value, end of period $ 8.14 $ 9.02 ===================================================================================================== Total return* (5.86)% 5.80% Ratio of net expenses to average net assets+ 1.80%** 1.82% Ratio of net investment income to average net assets+ 5.02%** 3.79% Portfolio turnover rate 25%** 73% Net assets, end of period (in thousands) $ 41,053 $35,784 Ratios with no assumption of expenses by PIM and no reduction for fees paid indirectly: Net expenses 1.80%** 1.82% Net investment income 5.02%** 3.79% Ratios with assumption of expenses by PIM and reduction for fees paid indirectly: Net expenses 1.80%** 1.82% Net investment income 5.02%** 3.79% ===================================================================================================== Year Year Year Year Ended Ended Ended Ended 6/30/07 6/30/06 6/30/05 6/30/04 Class C Net asset value, beginning of period $ 8.81 $ 9.32 $ 9.11 $ 9.31 - -------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income $ 0.33 $ 0.28 $ 0.32 $ 0.33 Net realized and unrealized gain (loss) on investments 0.06 (0.47) 0.28 (0.14) - -------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 0.39 $ (0.19) $ 0.60 $ 0.19 Distributions to shareowners: Net investment income (0.33) (0.32) (0.39) (0.39) Net realized gain -- -- -- -- - -------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 0.06 $ (0.51) $ 0.21 $ (0.20) - -------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 8.87 $ 8.81 $ 9.32 $ 9.11 ==================================================================================================================== Total return* 4.39% (2.08)% 6.68% 2.11% Ratio of net expenses to average net assets+ 1.85% 1.89% 1.92% 1.97% Ratio of net investment income to average net assets+ 3.62% 3.07% 3.24% 3.59% Portfolio turnover rate 31% 60% 49% 63% Net assets, end of period (in thousands) $30,934 $35,942 $42,160 $27,545 Ratios with no assumption of expenses by PIM and no reduction for fees paid indirectly: Net expenses 1.85% 1.89% 1.92% 1.97% Net investment income 3.62% 3.07% 3.24% 3.59% Ratios with assumption of expenses by PIM and reduction for fees paid indirectly: Net expenses 1.84% 1.89% 1.91% 1.97% Net investment income 3.63% 3.07% 3.25% 3.59% ==================================================================================================================== * 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. ** Annualized. The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Semi-Annual Report | 12/31/08 47 Financial Highlights (continued) Six Months Ended Year 12/31/08 Ended (unaudited) 6/30/08 Class R Net asset value, beginning of period $ 9.18 $ 9.05 - --------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income $ 0.24 $ 0.40 Net realized and unrealized gain (loss) on investments (0.75) 0.15 - --------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ (0.51) $ 0.55 Distributions to shareowners: Net investment income (0.27) (0.42) Net realized gain (0.11) -- - --------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ (0.89) $ 0.13 - --------------------------------------------------------------------------------------------------- Net asset value, end of period $ 8.29 $ 9.18 =================================================================================================== Total return* (5.56)% 6.15% Ratio of net expenses to average net assets+ 1.25%** 1.25% Ratio of net investment income to average net assets+ 5.58%** 4.35% Portfolio turnover rate 25%** 73% Net assets, end of period (in thousands) $11,702 $11,263 Ratios with no assumption of expenses by PIM and no reduction for fees paid indirectly: Net expenses 1.32%** 1.31% Net investment income 5.52%** 4.30% Ratios with assumption of expenses by PIM and reduction for fees paid indirectly: Net expenses 1.25%** 1.25% Net investment income 5.58%** 4.35% - --------------------------------------------------------------------------------------------------- Year Year Year Year Ended Ended Ended Ended 6/30/07 6/30/06 6/30/05 6/30/04 Class R Net asset value, beginning of period $ 8.99 $ 9.50 $ 9.28 $ 9.50 - ------------------------------------------------------------------------------------------------------------------ Increase (decrease) from investment operations: Net investment income $ 0.39 $ 0.34 $ 0.36 $ 0.47 Net realized and unrealized gain (loss) on investments 0.06 (0.47) 0.30 (0.17) - ------------------------------------------------------------------------------------------------------------------ Net increase (decrease) from investment operations $ 0.45 $ (0.13) $ 0.66 $ 0.30 Distributions to shareowners: Net investment income (0.39) (0.38) (0.44) (0.52) Net realized gain -- -- -- -- - ------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net asset value $ 0.06 $ (0.51) $ 0.22 $ (0.22) - ------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $ 9.05 $ 8.99 $ 9.50 $ 9.28 ================================================================================================================== Total return* 5.04% (1.43)% 7.27% 3.20% Ratio of net expenses to average net assets+ 1.25% 1.25% 1.31% 1.32% Ratio of net investment income to average net assets+ 4.24% 3.50% 3.77% 4.71% Portfolio turnover rate 31% 60% 49% 63% Net assets, end of period (in thousands) $ 6,511 $ 3,042 $ 1,259 $ 345 Ratios with no assumption of expenses by PIM and no reduction for fees paid indirectly: Net expenses 1.44% 1.46% 1.43% 1.32% Net investment income 4.05% 3.29% 3.65% 4.71% Ratios with assumption of expenses by PIM and reduction for fees paid indirectly: Net expenses 1.25% 1.25% 1.31% 1.32% Net investment income 4.24% 3.50% 3.77% 4.71% - ------------------------------------------------------------------------------------------------------------------ * 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 each end of each period. + Ratio with no reduction for fees paid indirectly. ** Annualized. The accompanying notes are an integral part of these financial statements. 48 Pioneer Bond Fund | Semi-Annual Report | 12/31/08 Six Months Ended Year 12/31/08 Ended (unaudited) 6/30/08 Class Y Net asset value, beginning of period $ 9.02 $ 8.88 - ------------------------------------------------------------------------------------------------------ Increase (decrease) from investment operations: Net investment income $ 0.27 $ 0.45 Net realized and unrealized gain (loss) on investments (0.74) 0.16 - ------------------------------------------------------------------------------------------------------ Net increase (decrease) from investment operations $ (0.47) $ 0.61 Distributions to shareowners: Net investment income (0.29) (0.47) Net realized gain (0.11) -- - ------------------------------------------------------------------------------------------------------ Net increase (decrease) in net asset value $ (0.87) $ 0.14 - ------------------------------------------------------------------------------------------------------ Net asset value, end of period $ 8.15 $ 9.02 ====================================================================================================== Total return* (5.15)% 6.91% Ratio of net expenses to average net assets+ 0.63%** 0.59% Ratio of net investment income to average net assets+ 6.11%** 5.02% Portfolio turnover rate 25%** 73% Net assets, end of period (in thousands) $ 493,404 $710,219 Ratios with no assumption of expenses by PIM and no reduction for fees paid indirectly: Net expenses 0.68%** 0.61% Net investment income 6.07%** 5.00% Ratios with assumption of expenses by PIM and reduction for fees paid indirectly: Net expenses 0.63%** 0.59% Net investment income 6.11%** 5.02% ====================================================================================================== Year Year Year Year Ended Ended Ended Ended 6/30/07 6/30/06 6/30/05 6/30/04 Class Y Net asset value, beginning of period $ 8.83 $ 9.33 $ 9.12 $ 9.35 - ----------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income $ 0.44 $ 0.39 $ 0.44 $ 0.46 Net realized and unrealized gain (loss) on investments 0.06 (0.46) 0.28 (0.14) - ----------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 0.50 $ (0.07) $ 0.72 $ 0.32 Distributions to shareowners: Net investment income (0.45) (0.43) (0.51) (0.55) Net realized gain -- -- -- -- - ----------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 0.05 $ (0.50) $ 0.21 $ (0.23) - ----------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 8.88 $ 8.83 $ 9.33 $ 9.12 ======================================================================================================================= Total return* 5.65% (0.77)% 8.07% 3.48% Ratio of net expenses to average net assets+ 0.57% 0.58% 0.61% 0.58% Ratio of net investment income to average net assets+ 4.89% 4.20% 4.43% 5.05% Portfolio turnover rate 31% 60% 49% 63% Net assets, end of period (in thousands) $613,523 $521,480 $21,027 $13,617 Ratios with no assumption of expenses by PIM and no reduction for fees paid indirectly: Net expenses 0.57% 0.58% 0.61% 0.58% Net investment income 4.89% 4.20% 4.43% 5.05% Ratios with assumption of expenses by PIM and reduction for fees paid indirectly: Net expenses 0.57% 0.58% 0.61% 0.58% Net investment income 4.89% 4.20% 4.43% 5.05% ======================================================================================================================= * 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 each end of each period. + Ratio with no reduction for fees paid indirectly. ** Annualized. The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Semi-Annual Report | 12/31/08 49 Financial Highlights (continued) Six Months Ended 12/31/08 7/6/07 (a) (unaudited) to 6/30/08 Class Z Net asset value, beginning of period $ 9.10 $ 8.89 - -------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income $ 0.23 $ 0.45 Net realized and unrealized gain on investments (0.75) 0.22 - -------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ (0.52) $ 0.67 Distributions to shareowners: Net investment income (0.25) (0.46) Net realized gain (0.11) -- - -------------------------------------------------------------------------------------------- Net increase in net asset value $ (0.88) $ 0.21 - -------------------------------------------------------------------------------------------- Net asset value, end of period $ 8.22 $ 9.10 ============================================================================================ Total return* (5.22)% 7.63%(b) Ratio of net expenses to average net assets+ 0.63%** 0.58%** Ratio of net investment income to average net assets+ 6.18%** 5.00%** Portfolio turnover rate 25%** 73%** Net assets, end of period (in thousands) $ 92 $ 102 Ratios with no assumption of expenses by PIM and no reduction for fees paid indirectly: Net expenses 0.65%** 0.58%** Net investment income 6.16%** 5.00%** Ratios with assumption of expenses by PIM and reduction for fees paid indirectly: Net expenses 0.63%** 0.58%** Net investment income 6.18%** 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 each end of each period. ** Annualized. + Ratios with no fees paid indirectly. The accompanying notes are an integral part of these financial statements. 50 Pioneer Bond Fund | Semi-Annual Report | 12/31/08 Notes to Financial Statements | 12/31/08 (unaudited) 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 six classes of shares designated as Class A, Class B, Class C, Class R, Class Y and Class Z shares. Class R shares were first publicly offered on April 1, 2003. Class Z shares were first publicly offered on April 30, 2007. 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 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 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. Share classes have exclusive voting rights with respect to matters affecting only that class, including with respect to the distribution plan for that class. There is no distribution plan for Class Y shares and Class Z shares. Class B shares convert to Class A shares approximately eight years after the date of purchase. The Fund's financial statements have been prepared in conformity with U.S. generally accepted accounting principles that require the management of the Fund to, among other things, make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of income, expenses and gains and losses on investments during the reporting period. Actual results could differ from those estimates. 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 prospectuses contain unaudited information regarding the Fund's principal risks. Please refer to those documents when considering the Fund's principal risks. Pioneer Bond Fund | Semi-Annual Report | 12/31/08 51 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. Securities are valued at prices supplied by independent pricing services, which consider such factors as Treasury spreads, yields, maturities and ratings. Valuations may be supplemented by dealers and other sources, as required. Securities for which there are no other readily available valuation methods are valued using fair value methods pursuant to procedures adopted by the Board of Trustees. At December 31, 2008 two securities have been fair valued, which represents 0.45% of net assets. Principal amounts of mortgage-backed securities are adjusted for monthly paydowns. Temporary cash investments are valued at cost which approximates market value. All discounts/premiums on debt securities are accreted/amortized for financial reporting purposes over the life of the respective securities, and are included in interest income. Market discount and premium are accreted or amortized daily. Premiums and discounts related to certain mortgage-backed securities are amortized or accreted in proportion to the underlying monthly paydowns. Interest income is recorded on the accrual basis. 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. 52 Pioneer Bond Fund | Semi-Annual Report | 12/31/08 The tax character of current year distributions paid will be determined at the end of the current taxable year. The tax character of distributions paid during the year ended June 30, 2008 was as follows: 2008 Distributions paid from: Ordinary income $53,255,381 - ------------------------------------------------------------------------------- Total $53,255,381 =============================================================================== The difference between book basis and tax-basis unrealized appreciation is attributable to the tax treatment of 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 $20,808 in underwriting commissions on the sale of Class A shares during the six months ended December 31, 2008. 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 the 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. Class Y and Class Z shares are not subject to a distribution plan. Shareowners of each class participate in all expenses and fees paid to the transfer agent, Pioneer Investment Management Shareholder Services, Inc. (PIMSS), for its services, which are allocated 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 each class of shares can bear 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 at least equal to or in excess of the value of the repurchase Pioneer Bond Fund | Semi-Annual Report | 12/31/08 53 agreement. The collateral for all repurchase agreements is held in safekeeping in the customer-only account of the Fund's custodian or subcustodians. 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 value of the securities loaned, which is invested in temporary cash investments. Credit Suisse, New York Branch, as the Fund's security 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 interest or payments in lieu of dividends on the securities loaned. Gain or loss on the value of the loaned securities that may occur during the term of the loan will be for the account of the Fund. The amount of the collateral is required to be adjusted daily to reflect any price fluctuation in the value of the loaned securities. 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 will be required to return the cash collateral to the borrower and could suffer a loss if the value of the collateral, as invested, has declined. 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 six months ended December 31, 2008, the net management fee was equal to 0.25% of the Fund's average daily net assets. PIM has agreed to limit ordinary operating expenses to the extent required to reduce Fund expenses to 0.85%, 1.90%, 1.90%, 1.25% and 0.65% of the average daily net assets attributable to Class A, Class B, Class C, Class R and Class Z shares, respectively. Class Y shares do not have an expense limitation. These expense limitations are in effect through November 1, 2013 for Class A shares and Class Z shares through November 1, 2010 for Class B, Class C, Class R and Class Z shares. PIM expects to continue its limitation of expenses unless the expense limit agreement with the Fund is terminated pursuant to the terms of the expense limit agreement. However, there can be no assurance that PIM will extend the expense limitation beyond November 1, 2013 for Class A shares and Class Z shares November 1, 2010 for Class B, Class C and Class R shares. 54 Pioneer Bond Fund | Semi-Annual Report | 12/31/08 The Fund may terminate the expense limitation agreement at any time; provided, however, that the Board of Trustees would not take such action unless it determined termination of the agreement be in the best interests of the Fund and its shareowners. 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. Included in "Due to Affiliates" reflected on the Statement of Assets and Liabilities is $11,966 in management fees, administrative costs and certain other services payable to PIM at June 30, 2008. 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 reimbursed PIMSS for out-of-pocket expenses related to shareholder communications activities such as proxy and statement mailings, outgoing phone calls and omnibus relationship contracts. For the year ended December 31, 2008, such out of pocket expenses by class of shares were as follows: Shareholder Communications: Class A $138,937 Class B 7,095 Class C 12,974 Class R 12,047 Class Y 146,653 Class Z 5 - -------------------------------------------------------------------------------- Total: $317,711 ================================================================================ Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $181,544 in transfer agent fees and shareholder communications expense payable to PIMSS at December 31, 2008. 4. Distribution and Service Plans The Fund 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 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 pays PFD 0.50% of the average daily net assets attributable to Class R shares for distribution services. Prior to Pioneer Bond Fund | Semi-Annual Report | 12/31/08 55 February 1, 2008, PFD was reimbursed under the Distribution Plan for distribution expenses in an amount of up to 0.25% of the average daily net assets attributable to Class A shares. Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $3,905 in distribution fees payable to PFD at December 31, 2008. 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 and Class Y shares) may be subject to a contingent deferred sales charge (CDSC). A CDSC of 1.00% may be imposed on redemptions of certain net asset value purchases of Class A shares within 18 months of purchase. Class B shares that are redeemed within five years of purchase are subject to a CDSC at declining rates beginning at 4.00% based on the lower of cost or market value of shares being redeemed. Shares purchased as part of an exchange or acquired as a result of a reorganization of another fund into the Fund remain subject to any contingent deferred sales charge that applied to the shares you originally purchased. 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. Proceeds from the CDSCs are paid to PFD. For the six months ended December 31, 2008, CDSCs in the amount of $44,910 were paid to PFD. 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 six months ended December 31, 2008, the Fund's expenses were reduced $4,257 under such arrangements. 6. Unfunded Loan Commitments As of December 31, 2008, the Fund had unfunded loan commitments of approximately $708,489 (excluding unrealized appreciation on those commitments of $341,544 as of December 31, 2008) which could be extended at the option of the borrower, pursuant to the following loan agreements: Unfunded Borrower Commitment Bausch & Lomb, Inc., Delayed Draw Term Loan $144,000 CHS/Community Health Systems, Inc., Delayed Draw Term Loan $ 58,289 Fontainebleau Las Vegas, LLC, Delayed Draw Term Loan $506,200 56 Pioneer Bond Fund | Semi-Annual Report | 12/31/08 7. New Pronouncement In March 2008, Statement of Financial Accounting Standards No. 161, Disclosures about Derivative Instruments and Hedging Activities ("SFAS 161"), was issued and is effective for fiscal years beginning after November 15, 2008. SFAS 161 requires enhanced disclosures about an entity's derivative and hedging activities. Management is currently evaluating the impact the adoption of SFAS 161 will have on the Fund's financial statement disclosures. Pioneer Bond Fund | Semi-Annual Report | 12/31/08 57 Trustees, Officers and Service Providers Trustees John F. Cogan, Jr., Chairman David R. Bock Mary K. Bush Benjamin M. Friedman Margaret B.W. Graham Daniel K. Kingsbury Thomas J. Perna Marguerite A. Piret Stephen K. West Officers John F. Cogan, Jr., President Daniel K. Kingsbury, Executive Vice President Mark E. Bradley, Treasurer Dorothy E. Bourassa, Secretary Investment Adviser and Administrator Pioneer Investment Management, Inc. Custodian Brown Brothers Harriman & Co. Principal Underwriter Pioneer Funds Distributor, Inc. Legal Counsel Bingham McCutchen LLP Shareowner Services and Transfer Agent Pioneer Investment Management Shareholder Services, Inc. Proxy Voting Policies and Procedures of the Fund are available without charge, upon request, by calling our toll free number (1-800-225-6292). Information regarding how the Fund voted proxies relating to portfolio securities during the most recent 12-month period ended June 30 is publicly available to shareowners at pioneerinvestments.com. This information is also available on the Securities and Exchange Commission's web site at http://www.sec.gov. 58 Pioneer Bond Fund | Semi-Annual Report | 12/31/08 This page for your notes. Pioneer Bond Fund | Semi-Annual Report | 12/31/08 59 This page for your notes. 60 Pioneer Bond Fund | Semi-Annual Report | 12/31/08 How To Contact Pioneer We are pleased to offer a variety of convenient ways for you to contact us for assistance or information. Call us for: - -------------------------------------------------------------------------------- Account Information, including existing accounts, new accounts, prospectuses, applications and service forms 1-800-225-6292 FactFone(SM) for automated fund yields, prices, account information and transactions 1-800-225-4321 Retirement plans information 1-800-622-0176 Telecommunications Device for the Deaf (TDD) 1-800-225-1997 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 accompanied by a prospectus. The Fund files a complete schedule of investments with the Securities and Exchange Commission for the first and third quarters for each fiscal year on Form N-Q. Shareholders may view the filed Form N-Q by visiting the Commission's web site at http://www.sec.gov. The filed form may also be viewed and copied at the Commission's Public Reference Room in Washington, DC. Information regarding the operations of the Public Reference Room may be obtained by calling 1-800-SEC-0330. ITEM 2. CODE OF ETHICS. (a) Disclose whether, as of the end of the period covered by the report, the registrant has adopted a code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party. If the registrant has not adopted such a code of ethics, explain why it has not done so. The registrant has adopted, as of the end of the period covered by this report, a code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer and controller. (b) For purposes of this Item, the term "code of ethics" means written standards that are reasonably designed to deter wrongdoing and to promote: (1) Honest and ethical conduct, including the ethical handling of actual or apparent conflicts of interest between personal and professional relationships; (2) Full, fair, accurate, timely, and understandable disclosure in reports and documents that a registrant files with, or submits to, the Commission and in other public communications made by the registrant; (3) Compliance with applicable governmental laws, rules, and regulations; (4) The prompt internal reporting of violations of the code to an appropriate person or persons identified in the code; and (5) Accountability for adherence to the code. (c) The registrant must briefly describe the nature of any amendment, during the period covered by the report, to a provision of its code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party, and that relates to any element of the code of ethics definition enumerated in paragraph (b) of this Item. The registrant must file a copy of any such amendment as an exhibit pursuant to Item 10(a), unless the registrant has elected to satisfy paragraph (f) of this Item by posting its code of ethics on its website pursuant to paragraph (f)(2) of this Item, or by undertaking to provide its code of ethics to any person without charge, upon request, pursuant to paragraph (f)(3) of this Item. The registrant has made no amendments to the code of ethics during the period covered by this report. (d) If the registrant has, during the period covered by the report, granted a waiver, including an implicit waiver, from a provision of the code of ethics to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party, that relates to one or more of the items set forth in paragraph (b) of this Item, the registrant must briefly describe the nature of the waiver, the name of the person to whom the waiver was granted, and the date of the waiver. Not applicable. (e) If the registrant intends to satisfy the disclosure requirement under paragraph (c) or (d) of this Item regarding an amendment to, or a waiver from, a provision of its code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions and that relates to any element of the code of ethics definition enumerated in paragraph (b) of this Item by posting such information on its Internet website, disclose the registrant's Internet address and such intention. Not applicable. (f) The registrant must: (1) File with the Commission, pursuant to Item 10(a), a copy of its code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, as an exhibit to its annual report on this Form N-CSR; (2) Post the text of such code of ethics on its Internet website and disclose, in its most recent report on this Form N-CSR, its Internet address and the fact that it has posted such code of ethics on its Internet website; or (3) Undertake in its most recent report on this Form N-CSR to provide to any person without charge, upon request, a copy of such code of ethics and explain the manner in which such request may be made. 	See Item 10(2) ITEM 3. AUDIT COMMITTEE FINANCIAL EXPERT. (a) (1) Disclose that the registrant's board of trustees has determined that the registrant either: (i) Has at least one audit committee financial expert serving on its audit committee; or (ii) Does not have an audit committee financial expert serving on its audit committee. The registrant's Board of Trustees has determined that the registrant has at least one audit committee financial expert. (2) If the registrant provides the disclosure required by paragraph (a)(1)(i) of this Item, it must disclose the name of the audit committee financial expert and whether that person is "independent." In order to be considered "independent" for purposes of this Item, a member of an audit committee may not, other than in his or her capacity as a member of the audit committee, the board of trustees, or any other board committee: (i) Accept directly or indirectly any consulting, advisory, or other compensatory fee from the issuer; or (ii) Be an "interested person" of the investment company as defined in Section 2(a)(19) of the Act (15 U.S.C. 80a-2(a)(19)). Ms. Marguerite A. Piret, an independent trustee, is such an audit committee financial expert. (3) If the registrant provides the disclosure required by paragraph (a)(1) (ii) of this Item, it must explain why it does not have an audit committee financial expert. Not applicable. ITEM 4. PRINCIPAL ACCOUNTANT FEES AND SERVICES. (a) Disclose, under the caption AUDIT FEES, the aggregate fees billed for each of the last two fiscal years for professional services rendered by the principal accountant for the audit of the registrant's annual financial statements or services that are normally provided by the accountant in connection with statutory and regulatory filings or engagements for those fiscal years. N/A (b) Disclose, under the caption AUDIT-RELATED FEES, the aggregate fees billed in each of the last two fiscal years for assurance and related services by the principal accountant that are reasonably related to the performance of the audit of the registrant's financial statements and are not reported under paragraph (a) of this Item. Registrants shall describe the nature of the services comprising the fees disclosed under this category. N/A (c) Disclose, under the caption TAX FEES, the aggregate fees billed in each of the last two fiscal years for professional services rendered by the principal accountant for tax compliance, tax advice, and tax planning. Registrants shall describe the nature of the services comprising the fees disclosed under this category. N/A (d) Disclose, under the caption ALL OTHER FEES, the aggregate fees billed in each of the last two fiscal years for products and services provided by the principal accountant, other than the services reported in paragraphs (a) through (c) of this Item. Registrants shall describe the nature of the services comprising the fees disclosed under this category. N/A (e) (1) Disclose the audit committee's pre-approval policies and procedures described in paragraph (c)(7) of Rule 2-01 of Regulation S-X. PIONEER FUNDS APPROVAL OF AUDIT, AUDIT-RELATED, TAX AND OTHER SERVICES PROVIDED BY THE INDEPENDENT AUDITOR SECTION I - POLICY PURPOSE AND APPLICABILITY The Pioneer Funds recognize the importance of maintaining the independence of their outside auditors. Maintaining independence is a shared responsibility involving Pioneer Investment Management, Inc ("PIM"), the audit committee and the independent auditors. The Funds recognize that a Fund's independent auditors: 1) possess knowledge of the Funds, 2) are able to incorporate certain services into the scope of the audit, thereby avoiding redundant work, cost and disruption of Fund personnel and processes, and 3) have expertise that has value to the Funds. As a result, there are situations where it is desirable to use the Fund's independent auditors for services in addition to the annual audit and where the potential for conflicts of interests are minimal. Consequently, this policy, which is intended to comply with Rule 210.2-01(C)(7), sets forth guidelines and procedures to be followed by the Funds when retaining the independent audit firm to perform audit, audit-related tax and other services under those circumstances, while also maintaining independence. Approval of a service in accordance with this policy for a Fund shall also constitute approval for any other Fund whose pre-approval is required pursuant to Rule 210.2-01(c)(7)(ii). In addition to the procedures set forth in this policy, any non-audit services that may be provided consistently with Rule 210.2-01 may be approved by the Audit Committee itself and any pre-approval that may be waived in accordance with Rule 210.2-01(c)(7)(i)(C) is hereby waived. Selection of a Fund's independent auditors and their compensation shall be determined by the Audit Committee and shall not be subject to this policy. SECTION II - POLICY - ---------------- -------------------------------- ------------------------------------------------- SERVICE SERVICE CATEGORY DESCRIPTION SPECIFIC PRE-APPROVED SERVICE SUBCATEGORIES CATEGORY - ---------------- -------------------------------- ------------------------------------------------- I. AUDIT Services that are directly o Accounting research assistance SERVICES related to performing the o SEC consultation, registration independent audit of the Funds statements, and reporting o Tax accrual related matters o Implementation of new accounting standards o Compliance letters (e.g. rating agency letters) o Regulatory reviews and assistance regarding financial matters o Semi-annual reviews (if requested) o Comfort letters for closed end offerings - ---------------- -------------------------------- ------------------------------------------------- II. Services which are not o AICPA attest and agreed-upon procedures AUDIT-RELATED prohibited under Rule o Technology control assessments SERVICES 210.2-01(C)(4) (the "Rule") o Financial reporting control assessments and are related extensions of o Enterprise security architecture the audit services support the assessment audit, or use the knowledge/expertise gained from the audit procedures as a foundation to complete the project. In most cases, if the Audit-Related Services are not performed by the Audit firm, the scope of the Audit Services would likely increase. The Services are typically well-defined and governed by accounting professional standards (AICPA, SEC, etc.) - ---------------- -------------------------------- ------------------------------------------------- ------------------------------------- ------------------------------------ AUDIT COMMITTEE APPROVAL POLICY AUDIT COMMITTEE REPORTING POLICY ------------------------------------- ------------------------------------ o "One-time" pre-approval o A summary of all such for the audit period for all services and related fees pre-approved specific service reported at each regularly subcategories. Approval of the scheduled Audit Committee independent auditors as meeting. auditors for a Fund shall constitute pre approval for these services. ------------------------------------- ------------------------------------ o "One-time" pre-approval o A summary of all such for the fund fiscal year within services and related fees a specified dollar limit (including comparison to for all pre-approved specified dollar limits) specific service subcategories reported quarterly. o Specific approval is needed to exceed the pre-approved dollar limit for these services (see general Audit Committee approval policy below for details on obtaining specific approvals) o Specific approval is needed to use the Fund's auditors for Audit-Related Services not denoted as "pre-approved", or to add a specific service subcategory as "pre-approved" ------------------------------------- ------------------------------------ SECTION III - POLICY DETAIL, CONTINUED - ----------------------- --------------------------- ----------------------------------------------- SERVICE CATEGORY SERVICE CATEGORY SPECIFIC PRE-APPROVED SERVICE SUBCATEGORIES DESCRIPTION - ----------------------- --------------------------- ----------------------------------------------- III. TAX SERVICES Services which are not o Tax planning and support prohibited by the Rule, o Tax controversy assistance if an officer of the Fund o Tax compliance, tax returns, excise determines that using the tax returns and support Fund's auditor to provide o Tax opinions these services creates significant synergy in the form of efficiency, minimized disruption, or the ability to maintain a desired level of confidentiality. - ----------------------- --------------------------- ----------------------------------------------- - ------------------------------------- ------------------------- AUDIT COMMITTEE APPROVAL POLICY AUDIT COMMITTEE REPORTING POLICY - ------------------------------------- ------------------------- - ------------------------------------- ------------------------- o "One-time" pre-approval o A summary of for the fund fiscal year all such services and within a specified dollar limit related fees 				 (including comparison 			 to specified dollar 			 limits) reported 			 quarterly. o Specific approval is needed to exceed the pre-approved dollar limits for these services (see general Audit Committee approval policy below for details on obtaining specific approvals) o Specific approval is needed to use the Fund's auditors for tax services not denoted as pre-approved, or to add a specific service subcategory as "pre-approved" - ------------------------------------- ------------------------- SECTION III - POLICY DETAIL, CONTINUED - ----------------------- --------------------------- ----------------------------------------------- SERVICE CATEGORY SERVICE CATEGORY SPECIFIC PRE-APPROVED SERVICE SUBCATEGORIES DESCRIPTION - ----------------------- --------------------------- ----------------------------------------------- IV. OTHER SERVICES Services which are not o Business Risk Management support prohibited by the Rule, o Other control and regulatory A. SYNERGISTIC, if an officer of the Fund compliance projects UNIQUE QUALIFICATIONS determines that using the Fund's auditor to provide these services creates significant synergy in the form of efficiency, minimized disruption, the ability to maintain a desired level of confidentiality, or where the Fund's auditors posses unique or superior qualifications to provide these services, resulting in superior value and results for the Fund. - ----------------------- --------------------------- ----------------------------------------------- - --------------------------------------- ------------------------ AUDIT COMMITTEE APPROVAL POLICY AUDIT COMMITTEE REPORTING POLICY - ------------------------------------- -------------------------- o "One-time" pre-approval o A summary of for the fund fiscal year within all such services and a specified dollar limit related fees 			 (including comparison 			 to specified dollar 				 limits) reported quarterly. o Specific approval is needed to exceed the pre-approved dollar limits for these services (see general Audit Committee approval policy below for details on obtaining specific approvals) o Specific approval is needed to use the Fund's auditors for "Synergistic" or "Unique Qualifications" Other Services not denoted as pre-approved to the left, or to add a specific service subcategory as "pre-approved" - ------------------------------------- -------------------------- SECTION III - POLICY DETAIL, CONTINUED - ----------------------- ------------------------- ----------------------------------------------- SERVICE CATEGORY SERVICE CATEGORY SPECIFIC PROHIBITED SERVICE SUBCATEGORIES DESCRIPTION - ----------------------- ------------------------- ----------------------------------------------- PROHIBITED SERVICES Services which result 1. Bookkeeping or other services in the auditors losing related to the accounting records or independence status financial statements of the audit under the Rule. client* 2. Financial information systems design and implementation* 3. Appraisal or valuation services, fairness* opinions, or contribution-in-kind reports 4. Actuarial services (i.e., setting actuarial reserves versus actuarial audit work)* 5. Internal audit outsourcing services* 6. Management functions or human resources 7. Broker or dealer, investment advisor, or investment banking services 8. Legal services and expert services unrelated to the audit 9. Any other service that the Public Company Accounting Oversight Board determines, by regulation, is impermissible - ----------------------- ------------------------- ----------------------------------------------- - ------------------------------------------- ------------------------------ AUDIT COMMITTEE APPROVAL POLICY AUDIT COMMITTEE REPORTING POLICY - ------------------------------------------- ------------------------------ o These services are not to be o A summary of all performed with the exception of the(*) services and related services that may be permitted fees reported at each if they would not be subject to audit regularly scheduled procedures at the audit client (as Audit Committee meeting defined in rule 2-01(f)(4)) level will serve as continual the firm providing the service. confirmation that has 				 not provided any restricted services. - ------------------------------------------- ------------------------------ - -------------------------------------------------------------------------------- GENERAL AUDIT COMMITTEE APPROVAL POLICY: o For all projects, the officers of the Funds and the Fund's auditors will each make an assessment to determine that any proposed projects will not impair independence. o Potential services will be classified into the four non-restricted service categories and the "Approval of Audit, Audit-Related, Tax and Other Services" Policy above will be applied. Any services outside the specific pre-approved service subcategories set forth above must be specifically approved by the Audit Committee. o At least quarterly, the Audit Committee shall review a report summarizing the services by service category, including fees, provided by the Audit firm as set forth in the above policy. - -------------------------------------------------------------------------------- (2) Disclose the percentage of services described in each of paragraphs (b) through (d) of this Item that were approved by the audit committee pursuant to paragraph (c)(7)(i)(C) of Rule 2-01 of Regulation S-X. N/A (f) If greater than 50 percent, disclose the percentage of hours expended on the principal accountant's engagement to audit the registrant's financial statements for the most recent fiscal year that were attributed to work performed by persons other than the principal accountant's full-time, permanent employees. N/A (g) Disclose the aggregate non-audit fees billed by the registrant's accountant for services rendered to the registrant, and rendered to the registrant's investment adviser (not including any sub-adviser whose role is primarily portfolio management and is subcontracted with or overseen by another investment adviser), and any entity controlling, controlled by, or under common control with the adviser that provides ongoing services to the registrant for each of the last two fiscal years of the registrant. N/A (h) Disclose whether the registrant's audit committee of the board of trustees has considered whether the provision of non-audit services that were rendered to the registrant's investment adviser (not including any subadviser whose role is primarily portfolio management and is subcontracted with or overseen by another investment adviser), and any entity controlling, controlled by, or under common control with the investment adviser that provides ongoing services to the registrant that were not pre-approved pursuant to paragraph (c)(7)(ii) of Rule 2-01 of Regulation S-X is compatible with maintaining the principal accountant's independence. The Fund's audit committee of the Board of Trustees has considered whether the provision of non-audit services that were rendered to the Affiliates (as defined) that were not pre- approved pursuant to paragraph (c)(7)(ii) of Rule 2-01 of Regulation S-X is compatible with maintaining the principal accountant's independence. Item 5. Audit Committee of Listed Registrants (a) If the registrant is a listed issuer as defined in Rule 10A-3 under the Exchange Act (17 CFR 240.10A-3), state whether or not the registrant has a separately-designated standing audit committee established in accordance with Section 3(a)(58)(A) of the Exchange Act (15 U.S.C. 78c(a)(58)(A)). If the registrant has such a committee, however designated, identify each committee member. If the entire board of directors is acting as the registrants audit committee as specified in Section 3(a)(58)(B) of the Exchange Act (15 U.S.C. 78c(a)(58)(B)), so state. N/A (b) If applicable, provide the disclosure required by Rule 10A-3(d) under the Exchange Act (17 CFR 240.10A-3(d)) regarding an exemption from the listing standards for audit committees. N/A Item 6. Schedule of Investments. File Schedule I Investments in securities of unaffiliated issuers as of the close of the reporting period as set forth in 210.12- 12 of Regulation S-X [17 CFR 210.12-12], unless the schedule is included as part of the report to shareholders filed under Item 1 of this Form. Included in Item 1 ITEM 7. DISCLOSURE OF PROXY VOTING POLICIES AND PROCEDURES FOR CLOSED-END MANAGEMENT INVESTMENT COMPANIES. A closed-end management investment company that is filing an annual report on this Form N-CSR must, unless it invests exclusively in non-voting securities, describe the policies and procedures that it uses to determine how to vote proxies relating to portfolio securities, including the procedures that the company uses when a vote presents a conflict between the interests of its shareholders, on the one hand, and those of the company's investment adviser; principal underwriter; or any affiliated person (as defined in Section 2(a)(3) of the Investment Company Act of 1940 (15 U.S.C. 80a-2(a)(3)) and the rules thereunder) of the company, its investment adviser, or its principal underwriter, on the other. Include any policies and procedures of the company's investment adviser, or any other third party, that the company uses, or that are used on the company's behalf, to determine how to vote proxies relating to portfolio securities. Not applicable to open-end management investment companies. Item 8. Portfolio Managers of Closed-End Management Investment Companies. (a) If the registrant is a closed-end management investment company that is filing an annual report on this Form N-CSR,provide the following information: (1) State the name, title, and length of service of the person or persons employed by or associated with the registrant or an investment adviser of the registrant who are primarily responsible for the day-to-day management of the registrants portfolio (Portfolio Manager). Also state each Portfolio Managers business experience during the past 5 years. Not applicable to open-end management investment companies. Item 9. Purchases of Equity Securities by Closed-End Management Investment Company and Affiliated Purchasers. (a) If the registrant is a closed-end management investment company, in the following tabular format, provide the information specified in paragraph (b) of this Item with respect to any purchase made by or on behalf of the registrant or any affiliated purchaser, as defined in Rule 10b-18(a)(3) under the Exchange Act (17 CFR 240.10b-18(a)(3)), of shares or other units of any class of the registrants equity securities that is registered by the registrant pursuant to Section 12 of the Exchange Act (15 U.S.C. 781). Instruction to paragraph (a). Disclose all purchases covered by this Item, including purchases that do not satisfy the conditions of the safe harbor of Rule 10b-18 under the Exchange Act (17 CFR 240.10b-18), made in the period covered by the report. Provide disclosures covering repurchases made on a monthly basis. For example, if the reporting period began on January 16 and ended on July 15, the chart would show repurchases for the months from January 16 through February 15, February 16 through March 15, March 16 through April 15, April 16 through May 15, May 16 through June 15, and June 16 through July 15. Not applicable to open-end management investment companies. Item 10. Submission of Matters to a Vote of Security Holders. Describe any material changes to the procedures by which shareholders may recommend nominees to the registrants board of directors, where those changes were implemented after the registrant last provided disclosure in response to the requirements of Item 7(d)(2)(ii)(G) of Schedule 14A (17 CFR 240.14a-101), or this Item. There have been no material changes to the procedures by which the shareholders may recommend nominees to the registrants board of directors since the registrant last provided disclosure in response to the requirements of Item 7(d)(2)(ii)(G) of Schedule 14(A) in its definitive proxy statement, or this Item. ITEM 11. CONTROLS AND PROCEDURES. (a) Disclose the conclusions of the registrant's principal executive officer or officers and principal financial officer or officers, or persons performing similar functions, about the effectiveness of the registrant's disclosure controls and procedures (as defined in Rule 30a-2(c) under the Act (17 CFR 270.30a-2(c))) based on their evaluation of these controls and procedures as of a date within 90 days of the filing date of the report that includes the disclosure required by this paragraph. The registrant's principal executive officer and principal financial officer have concluded that the registrant's disclosure controls and procedures are effective based on their evaluation of these controls and procedures as of a date within 90 days of the filing date of this report. (b) Disclose whether or not there were significant changes in the registrant's internal controls or in other factors that could significantly affect these controls subsequent to the date of their evaluation, including any corrective actions with regard to significant deficiencies and material weaknesses. There were no significant changes in the registrant's internal control over financial reporting that occurred during the second fiscal quarter of the period covered by this report that have materially affected, or are reasonably likely to materially affect, the registrant's internal control over financial reporting. The registrant's principal executive officer and principal financial officer, however, voluntarily are reporting the following information: In August of 2006 the registrant's investment adviser enhanced its internal procedures for reporting performance information required to be included in prospectuses. Those enhancements involved additional internal controls over the appropriateness of performance data generated for this purpose. Such enhancements were made following an internal review which identified prospectuses relating to certain classes of shares of a limited number of registrants where, inadvertently, performance information not reflecting the deduction of applicable sales charges was included. Those prospectuses were revised, and the revised prospectuses were distributed to shareholders. ITEM 12. EXHIBITS. File the exhibits listed below as part of this Form. Letter or number the exhibits in the sequence indicated. (a) Any code of ethics, or amendment thereto, that is the subject of the disclosure required by Item 2, to the extent that the registrant intends to satisfy the Item 2 requirements through filing of an exhibit. (b) A separate certification for each principal executive officer and principal financial officer of the registrant as required by Rule 30a-2 under the Act (17 CFR 270.30a-2). Filed herewith. SIGNATURES [See General Instruction F] Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. (Registrant) Pioneer Bond Fund By (Signature and Title)* /s/ John F. Cogan, Jr. John F. Cogan, Jr, President Date February 27, 2009 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 February 27, 2009 By (Signature and Title)* /s/ Mark Bradley Mark Bradley, Treasurer Date February 27, 2009 * Print the name and title of each signing officer under his or her signature.