PIONEER BOND FUND /MA/
N-30D, 1997-02-26
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[Pioneer Logo]

Pioneer Bond 
Fund 

SEMIANNUAL REPORT 12/31/96

<PAGE> 

T a b l e  o f  C o n t e n t s 

<TABLE>
<CAPTION>
<S>                                                     <C>
Letter from the Chairman                                 1 
Portfolio Summary                                        2 
Performance Update                                       3 
Portfolio Management Discussion                          6 
Schedule of Investments                                  9 
Financial Statements                                    14 
Notes to Financial Statements                           20 
Report of Independent Public Accountants                23 
Trustees, Officers and Service Providers                24 
Programs and Services for Pioneer Shareowners           26 
The Pioneer Family of Mutual Funds                      27 
</TABLE>

<PAGE> 

Pioneer Bond Fund 
LETTER FROM THE CHAIRMAN 12/31/96 

D e a r  S h a r e o w n e r, 

Welcome to this semiannual report on Pioneer Bond Fund, covering the six 
months ended December 31, 1996. Despite what turned out to be a volatile 
period for the bond market, your Fund continued to pay regular dividends and 
posted a modest total return. 

Without question, the past six months were difficult for quality-oriented 
bond investors. High-quality issues, particularly U.S. government securities, 
were in far less demand than low-rated issues. Why? One reason is that the 
performance of "junk" bonds often reflects stock performance; it's no secret 
that 1996 was a year of extraordinary gains in stock prices. The speculative 
edge that seemed to creep into the stock market - typified by investors' 
seemingly unquenchable thirst for little-understood initial public offerings 
and expensive but familiar companies - appears to have spilled over into the 
bond market. As a result, junk bonds cost nearly as much as higher-quality 
issues by the end of the period. 

No one can predict with any accuracy when investor psychology will shift so 
that today's "good" investment suddenly looks "bad" or expensive. However, 
the benefits of a high-quality portfolio and a disciplined investment style 
are clear, and should become more apparent if the stock market runs into any 
difficulty. The backdrop for bonds is favorable again, with interest rates 
moving down and inflation holding at low levels. In all, we think Pioneer 
Bond Fund is still a sound investment for quality-conscious investors looking 
for regular income. 

Please contact your investment representative, or us at 1-800-225-6292, if 
you have questions about your investment in Pioneer Bond Fund. Thank you for 
your continued support. 

Respectfully, 

/s/ John F. Cogan, Jr. 

John F. Cogan, Jr., 
Chairman and President 

                                      1 
<PAGE> 

Pioneer Bond Fund 

PORTFOLIO SUMMARY 12/31/96 

P o r t f o l i o  D i v e r s i f i c a t i o n 

(As a percentage of total investment portfolio) 

[Pie Chart] 

Short-Term Cash Equivalents 1% 
International 7% 
U.S. Government and Agency 34% 
Corporate 58% 

P o r t f o l i o  M a t u r i t y 

(Effective life as a percentage of total investment portfolio) 


[Pie Chart] 

10-20 Years 8% 
7-10 Years 9% 
5-7 Years 9% 
20+ Years 18% 
0-2 Years 17% 
2-5 Years 39% 

1 0  L a r g e s t  H o l d i n g s 

(As a percentage of long-term holdings) 


<TABLE>
<CAPTION>
 <S>                         <C>     <C>                                <C>
 1. U.S. Treasury Notes,             6. Imperial Oil, Ltd., 8.75%, 
    7.0%, 2006               6.22%      2019                            2.41% 
 2. U.S. Treasury Notes,              7. International Bank for 
    8.5%, 2000               5.48        Reconstruction and 
                                         Development, Deb. 9.25%, 
                                         2017                           2.13 
 3. U.S. Treasury Notes,              8. General Motors Corp., Notes, 
    8.25%, 1998              4.65        9.4%, 2021                     2.07 
 4. U.S. Treasury Bonds,              9. U.S. Treasury Notes, 8.75%, 
    7.25%, 2022              3.62        2008                           1.92 
 5. U.S. Treasury Notes,             10. Ford Motor Credit Co., 
    8.0%, 2001               3.20        9.14%, 2014                    1.90 
</TABLE>

Fund holdings will vary for other periods. 

                                      2 
<PAGE> 

Pioneer Bond Fund    

PERFORMANCE UPDATE 12/31/96     CLASS A SHARES 

S h a r e  P r i c e s  a n d  D i s t r i b u t i o n s 

<TABLE>
<CAPTION>
<S>                          <C>            <C>                <C>
Net Asset Value 
  per Share                  12/31/96       6/30/96 
                             $9.15          $9.08 

Distributions per Share      Income         Short-Term         Long-Term 
  (6/30/96-12/31/96)         Dividends      Capital Gains      Capital Gains  
                             $0.321                  -                  -
                             
</TABLE>

I n v e s t m e n t  R e t u r n s 

The mountain chart on the right shows the growth of a $10,000 investment made 
in Pioneer Bond Fund at public offering price, compared to the growth of the 
Lehman Brothers Government/Corporate Bond Index. 

<TABLE>
<CAPTION>
 Average Annual Total Returns 
  (As of December 31, 1996) 

Period           Net Asset      Public Offering 
                   Value             Price* 
<S>                <C>               <C>
10 Years           7.82%              7.33% 
5 Years            6.77%              5.78% 
1 Year             1.96%             -2.60% 
</TABLE>

* Reflects deduction of the maximum 4.5% sales charge at the beginning of the 
  period and assumes reinvestment of distributions at net asset value. 



[Mountain Chart] 

[plots for mountain chart]

Growth of $10,000
 
        Pioneer             Lehman Brothers
         Bond            Government/Corporate
         Fund*                Bond Index
12/86    9550                    10000 
12/87    9809                    10230 
12/88    10563                   11007 
12/89    11790                   12574 
12/90    12652                   13614 
12/91    14618                   15806 
12/92    15771                   17004 
12/93    17573                   18884 
12/94    16836                   18221 
12/95    19893                   21729 
12/96    20283                   22367 

The Lehman Brothers Government/Corporate Bond Index is an unmanaged, composite
index of the U.S. bond market. It contains 5,353 issues, including Treasury and
government agency securities, investment-grade corporate bonds and Yankee bonds.
Index returns assume reinvestment of dividends and, unlike Fund returns, do not
reflect any fees, expenses or sales charges. You cannot invest directly in the
Index.

Past performance does not guarantee future results. Return and share price 
fluctuate, and your shares, when redeemed, may be worth more or less than 
their original cost. 

                                      3 
<PAGE> 

Pioneer Bond Fund   

PERFORMANCE UPDATE 12/31/96  CLASS B SHARES 

S h a r e  P r i c e s  a n d  D i s t r i b u t i o n s 

<TABLE>
<CAPTION>
<S>                          <C>            <C>                <C>
Net Asset Value 
  per Share                  12/31/96       6/30/96 
                             $9.11          $9.02 

Distributions per Share      Income         Short-Term         Long-Term 
  (6/30/96-12/31/96)         Dividends      Capital Gains      Capital Gains 
                             $0.26                   -                   - 

</TABLE>

I n v e s t m e n t  R e t u r n s 


The mountain chart on the right shows the growth of a $10,000 investment made 
in Pioneer Bond Fund, compared to the growth of the Lehman Brothers 
Government/Corporate Bond Index. 



<TABLE>
<CAPTION>
 Average Annual Total Returns 
  (As of December 31, 1996) 


Period                 If          If 
                      Held      Redeemed 
Life of Fund          6.09%       5.11% 
<S>                   <C>        <C>
(4/4/94) 
1 Year                1.11%      -2.70% 
</TABLE>


* Reflects deduction of the maximum applicable contingent deferred sales 
charge (CDSC) at the end of the period and assumes reinvestment of 
distributions. The maximum CDSC of 4% declines over six years. 



[Mountain Chart] 


[plots for mountain chart]

Growth of $10,000+

          Pioneer              Lehman Brothers
           Bond             Government/Corporate
           Fund*                 Bond Index
4/94       10000                   10000 
6/94       9896                    9959  
9/94       9914                    10009 
12/94      9906                    10046 
3/95       10327                   10546 
6/95       10942                   11231 
9/95       11089                   11446 
12/95      11600                   11980 
3/96       11274                   11699 
6/96       11286                   11753 
9/96       11439                   11960 
12/96      11432                   12326 


*Index comparison begins 4/30/94. The Lehman Brothers Government/Corporate Bond
Index is an unmanaged, composite index of the U.S. bond market. It contains
5,353 issues, including Treasury and government agency securities, investment-
grade corporate bonds and Yankee bonds. Index returns assume reinvestment of
dividends and, unlike Fund returns, do not reflect any fees, expenses or sales
charges. You cannot invest directly in the Index.

Past performance does not guarantee future results. Return and share price 
fluctuate, and your shares, when redeemed, may be worth more or less than 
their original cost. 

                                      4 
<PAGE> 

Pioneer Bond Fund    

PERFORMANCE UPDATE 12/31/96   CLASS C SHARES 

S h a r e  P r i c e s  a n d  D i s t r i b u t i o n s 

<TABLE>
<CAPTION>
<S>                          <C>            <C>                <C>
Net Asset Value 
  per Share                  12/31/96       6/30/96 
                             $9.11          $9.02 

Distributions per Share      Income         Short-Term         Long-Term 
  (6/30/96-12/31/96)         Dividends      Capital Gains      Capital Gains 
                             $0.26                   -                   - 

</TABLE>

I n v e s t m e n t  R e t u r n s 



The mountain chart on the right shows the growth of a $10,000 investment made 
in Pioneer Bond, compared to the growth of the Lehman Brothers 
Government/Corporate Bond Index. 


<TABLE>
<CAPTION>
Cumulative Total Returns 
(As of December 31, 1996) 

Period                 If           If 
Life of Fund          Held      Redeemed* 
<S>                   <C>       <C>
(1/31/96)             0.81%     -0.15% 

</TABLE>

* Reflects deduction of the 1% contingent deferred sales charge (CDSC) at the 
end of the period and assumes reinvestment of distributions. 





[Mountain Chart] 


[plots for mountain chart]

Growth of $10,000

          Pioneer              Lehman Brothers
           Bond             Government/Corporate
           Fund*                 Bond Index
1/96       10000                   10000  
2/96       9766                    9788        
3/96       9679                    9706        
4/96       9612                    9639        
5/96       9620                    9622        
6/96       9700                    9750        
7/96       9714                    9773        
8/96       9687                    9748        
9/96       9831                    9922        
10/96      10029                   10153       
11/96      10207                   10340       
12/96      9986                    10227       
                                   

The Lehman Brothers Government/Corporate Bond Index is an unmanaged, composite
index of the U.S. bond market. It contains 5,353 issues, including Treasury and
government agency securities, investment-grade corporate bonds and Yankee bonds.
Index returns assume reinvestment of dividends and, unlike Fund returns, do not
reflect any fees, expenses or sales charges. You cannot invest directly in the
Index.

Past performance does not guarantee future results. Return and share price 
fluctuate, and your shares, when redeemed, may be worth more or less than 
their original cost. 

                                      5 
<PAGE> 

Pioneer Bond Fund 

PORTFOLIO MANAGEMENT DISCUSSION 12/31/96 

Dear Shareowner, 

Pioneer Bond Fund completed the first half of its nineteenth fiscal year on 
December 31, 1996. The bond market generally gained strength as the period 
progressed, bouncing back nicely from the price declines recorded by many 
high-quality bonds earlier in 1996. While downturns did exist during the six 
months, overall results were solid for investors. 

Rising Bond Prices for Much of the Period 

Financial markets overall ended higher on December 31 than where they stood 
on June 30. Volatility remained an issue, however, with some significant 
price swings recorded - from both stocks and bonds - particularly during July 
and December. The declines in December primarily stemmed from investors' 
unfavorable reaction to Federal Reserve Chairman Greenspan's comments on the 
stock market's "exuberance," and the implied potential for an increase in 
interest rates. In fact, most of the volatility that occurred during the six 
months was the result of perceptions and emotions. Many investors tried to 
anticipate the Federal Reserve's attitude about the economy, or whether it 
would raise or lower short-term interest rates. As it turned out, the Fed 
made no changes to interest rates during the fiscal period. Despite interim 
volatility, results for the six months were positive. Reflecting this, the 
yield on the benchmark 30-year Treasury bond was 6.64% on December 31, versus 
6.91% on July 1, after hitting a low for the period of 6.35% on November 29. 

While Treasury and other high-quality investments proved rewarding, they did 
not match the performance of many lower-quality securities. With the economy 
doing well and stock prices on the rise, many investors became more 
aggressive, selecting "junk" bonds and comparably risky securities. Because 
your Fund is committed to high-quality investments, it lagged funds that held 
low-grade issues in their portfolios. In our view, however, low-quality bonds 
subject investors to risks they may not even realize they are taking, until 
the market turns against them. We hold to our belief that conservative, 
high-quality investments should have a place in most investors' portfolios. 
We intend to maintain the high quality shareowners have come to depend on, as 
we continue to do all we can to deliver consistent 

                                      6 
<PAGE> 

Pioneer Bond Fund 

dividends and competitive investment returns. For additional information 
about Fund performance, please refer to the Performance Update section on 
page 3. 

Maintaining a Diversified, High-Quality Portfolio in a Fast-Moving Market 

Pioneer Bond Fund invests for current income through U.S. government 
securities and high-quality corporate bonds. The Fund chooses only securities 
issued by the U.S. government and its agencies, or corporate bonds rated AAA 
to BBB. What's more, at least 85% of the portfolio must be invested in bonds 
rated A or better by major rating agencies. As of December 31, the average 
quality rating of Fund holdings was AA. Additional information about the 
Fund's portfolio appears on page 2. 

We kept the portfolio fairly constant over the six months, given the overall 
volatility in bond prices. At year-end, securities with fewer than five years 
to maturity comprised 55% of the portfolio, down slightly from 61% on June 
30. We favored issues in the two-to-five year range (38%) since they 
generated more income than their shorter-term counterparts, while still 
contributing to overall price stability. We did modestly increase the Fund's 
position in long-term Treasury bonds, since they offer a good way to 
participate in the bond market's improving performance. Treasurys also can be 
traded quickly and therefore give us an efficient way to adjust the 
portfolio. Adding these securities caused the Fund's duration (which reflects 
the sensitivity of bond prices to changes in interest rates) to increase 
slightly over the six months, reflecting our more optimistic, yet still 
conservative, outlook for the bond market. The portfolio's average effective 
life also increased, from 7.6 years on June 30 to 8.5 years on December 31. 

Over the six months, we added a few corporate issues with an A or BBB rating, 
to take advantage of the strong performance being turned in by lower-rated 
bonds. As always, however, we performed a lengthy credit analysis before 
adding these securities to the portfolio. We are comfortable with the Fund's 
mix of quality, especially since no issue falls below investment-grade, and 
the average rating remains conservative. Industrial issues stayed the most 
prominent within the portfolio's corporate holdings, although we kept the 
Fund diversified across a variety of sectors. Our bias 

                                      7 
<PAGE> 

Pioneer Bond Fund 

PORTFOLIO MANAGEMENT DISCUSSION (continued) 

remains on well-known, proven companies that have a history of repaying their 
debt. Examples include Caterpillar, CoreStates Capital and Tenneco. 

Moving Forward 

As we indicated in your Fund's June 30 annual report, bond prices remained 
volatile over the period, reflecting how emotionally driven markets became in 
1996 - especially in a year when the Fed made only one change (furthermore, a 
cut) in short-term interest rates. We believe, particularly in the face of 
increasing emotions, that a long-term view is the best way to overcome 
volatility and pursue financial goals. 


We also are encouraged by factors that affect bond investing. Namely, we 
believe inflation will remain tame moving into 1997, since signs of an 
accelerated economy are, in our view, simply not apparent. The economy has 
shown sustainable and good growth, without "over-heating" - an important 
difference. As more investors realize the actual state of the economy and 
inflation, they may become less emotional, which could help lower the 
volatility we saw in the bond market in 1996. Moreover, the improving budget 
deficit, as well as ongoing efforts to achieve a balanced budget, could 
benefit bonds. Finally, we expect that investors - especially those who asset 
allocate - may look to rebalance their portfolios with more bond investments, 
given the appreciation that stocks experienced during the past year. Of 
course, whatever factors come into play, our primary focus for your Fund 
remains unchanged: We will pursue a steady stream of income from high-quality 
holdings. We expect Pioneer Bond Fund's conservative focus will reward 
patient investors. Thank you for your continued support. 

Respectfully, 

/s/ Sherman B. Russ 

Sherman B. Russ 
Portfolio Manager 

                                      8 
<PAGE> 

Pioneer Bond Fund 

SCHEDULE OF INVESTMENTS 12/31/96 
<TABLE>
<CAPTION>
             S&P/Moody's 
Principal    Ratings 
Amount       (Unaudited)                                                     Value 
<S>          <C>           <C>                                          <C>
                           INVESTMENT IN SECURITIES - 99.5% 
                           U.S. Government and Agency 
                           Obligations - 34.2% 
$  68,778                  Federal Home Loan Mortgage Corp., 10.0%, 
                           2002                                         $   72,260 
  117,511                  Federal Home Loan Mortgage Corp., 10.5%, 
                           2019                                            130,105 
  149,187                  Federal Home Loan Mortgage Corp., REMIC 
                           Series 1988-24B, 9.5%, 2005                     156,614 
1,000,000                  Federal National Mortgage Association, 8.8%, 
                           1997                                          1,017,970 
1,000,000                  Federal National Mortgage Association, 9.2%, 
                           1997                                          1,014,530 
1,500,000                  Federal National Mortgage Association, 9.2%, 
                           2000                                          1,642,740 
1,000,000                  Federal National Mortgage Association, 
                           10.35%, 2015                                  1,343,120 
   91,054                  Federal National Mortgage Association, 
                           10.0%, 2019                                     100,215 
  790,187                  Federal National Mortgage Association, 
                           11.0%, 2019                                     894,270 
1,269,464                  Federal National Mortgage Association, REMIC 
                           Series 1989-72D, 8.9%, 2019                   1,311,903 
  587,247                  Federal National Mortgage Association, REMIC 
                           Series 1989-19A, 10.3%, 2019                    647,645 
    7,752                  Federal National Mortgage Association, REMIC 
                           Series 1989-19B, 10.3%, 2019                      8,156 
  115,813                  Government National Mortgage Association, 
                           Midget, 10.0%, 2004                             122,544 
  301,747                  Government National Mortgage Association, 
                           10.0%, 2006                                     319,285 
  337,638                  Government National Mortgage Association, 
                           10.0%, 2018                                     371,875 
  190,953                  Government National Mortgage Association, 
                           9.5%, 2020                                      206,560 
  436,347                  Government National Mortgage Association, 
                           10.0%, 2020                                     479,981 

The accompanying notes are an integral part of these financial statements.

                                        9
<PAGE> 

Pioneer Bond Fund

SCHEDULE OF INVESTMENTS 12/31/96 (continued)

                           U.S. Government and Agency              
                           Obligations - (continued) 
$1,000,000                 Resolution Trust Corp., Series 1992-5A6, 
                           9.238%, 2026                                 $ 1,010,000 
 4,000,000                 U.S. Treasury Bonds, 7.25%, 2022               4,231,240 
 5,250,000                 U.S. Treasury Notes, 8.25%, 1998               5,437,005 
 6,000,000                 U.S. Treasury Notes, 8.5%, 2000                6,407,820 
 3,500,000                 U.S. Treasury Notes, 8.0%, 2001                3,740,065 
 7,000,000                 U.S. Treasury Notes, 7.0%, 2006                7,272,370 
 2,000,000                 U.S. Treasury Notes, 8.75%, 2008               2,245,620 
                                                                       ------------- 
                           Total U.S. Government and Agency 
                           Obligations (Cost $40,286,878)               $40,183,893 
                                                                       ------------- 
                           Industrials - 30.1% 
 1,000,000          A-/A2  Alcan Aluminum, Ltd., Deb., 9.625%, 2019     $ 1,131,940 
 1,916,853        BBB-/A3  American Airlines, Inc., 9.71%, 2007           2,149,885 
 1,000,000           A/A3  Arco Chemical Co., Deb., 9.8%, 2020            1,257,720 
   500,000           A/A2  Atlantic Richfield Co., Deb., 9.875%, 2016       625,940 
 1,500,000           A/A2  Caterpillar, Inc., 9.75%, 2019                 1,643,865 
 1,200,000       BBB/Baa3  Centex Corp., Deb., 8.75%, 2007                1,275,000 
 1,500,000       BB+/Baa3  Coastal Corp., Deb., 9.625%, 2012              1,788,615 
 2,000,000          A-/A3  General Motors Corp., Notes, 9.4%, 2021        2,414,740 
 1,000,000      BBB-/Baa2  Georgia-Pacific Corp., Deb., 9.5%, 2022        1,081,890 
 2,600,000        AA+/Aa2  Imperial Oil, Ltd., 8.75%, 2019                2,812,550 
 1,000,000        BBB/Ba1  Joy Technologies Co., Sen. Notes, 10.25%, 
                    2003                                                  1,102,500 
 1,500,000       BBB/Baa3  News America Holdings, 10.125%, 2012           1,720,215 
 1,000,000         AA/Aa3  Norfolk Southern Corp., Notes, 9.0%, 2021      1,142,260 
 1,000,000          A+/A1  J.C. Penney Company, Inc., Deb., 9.75%, 2021   1,120,060 
 2,000,000       BBB/Baa1  Phillips Petroleum Co., Deb., 9.18%, 2021      2,201,880 
 1,500,000         AA/Aa2  Procter & Gamble Co., Notes, 9.36%, 2021       1,821,600 
 1,000,000        BBB+/A3  Supervalue, Inc., Notes, 8.875%, 2022          1,060,670 
 1,250,000       BBB-/Ba1  Tele-Communication Inc., Deb., 10.125%, 2022   1,372,525 
 1,500,000      BBB-/Baa2  Tenneco, Inc., Notes, 10.075%, 2001            1,658,490 
 1,250,000          A+/A1  Texaco Capital Corp., Gtd. Deb., 9.75%, 2020   1,590,875 

The accompanying notes are an integral part of these financial statements.

                                      10 

<PAGE> 

Pioneer Bond Fund

                           Industrials - (continued) 
$2,000,000      BBB-/Ba1   Time Warner, Inc., Deb., 9.15%, 2023         $ 2,167,980 
 1,000,000      BB+/Baa3   USX Corp.-U.S. Steel Group, Deb., 9.375%, 
                           2012                                           1,160,390 
 1,000,000        AA/Aa2   Wal-Mart Stores, Inc., Deb., 8.50%, 2024       1,070,050 
                                                                       ------------- 
                           Total Industrials (Cost $34,047,535)         $35,371,640 
                                                                       ------------- 
                           Financial - 8.7% 
 2,000,000         A+/A1   Ford Motor Credit Co., 9.14%, 2014           $ 2,223,220 
 1,500,000        AA/Aa2   GEICO Corp., Deb., 9.15%, 2021                 1,726,095 
 2,000,000       AAA/Aaa   Standard Credit Card Master Trust Series 
                           1991-3A, 8.875%, 1998                          2,080,000 
 2,000,000       AAA/Aaa   Standard Credit Card Trust Series 1990-6A, 
                           9.375%, 1997                                   2,035,000 
 1,000,000          A/A2   Transamerica Corp., 9.875%, 1998               1,037,150 
 1,000,000         A+/A3   W.R. Berkley, Deb., 8.7%, 2022                 1,099,120 
                                                                       ------------- 
                           Total Financial (Cost $10,032,928)           $10,200,585 
                                                                       ------------- 
                           Banks - 14.5% 
 1,000,000         A+/A1   Banc One Corp., Sub. Notes, 10.0%, 2010      $ 1,233,060 
 1,000,000          A/A3   BankAmerica, Sub. Notes, 9.375%, 2001          1,096,680 
 1,000,000       AA-/Aa3   Barclays North American Capital Corp., Gtd. 
                           Sub. Cap. Notes, 9.75%, 2021                   1,139,640 
 1,000,000         A-/A2   Chase Manhattan, 8.5%, 2002                    1,073,510 
 1,000,000         A-/A2   Chemical NY Corp., Sub. Notes, 9.75%, 1999     1,072,920 
 1,250,000         A-/A3   Comerica, Inc., Sub. Deb., 10.125%, 1998       1,310,862 
 1,550,000         A-/A2   CoreStates Capital Corp., Gtd. Sub. Notes, 
                           9.375%, 2003                                   1,751,686 
 1,500,000         A-/A2   First Chicago Corp., Sub. Notes, 10.25%, 
                           2001                                           1,698,825 
 2,000,000       BBB+/A3   First Interstate Bancorp, Sub. Notes, 9.0%, 
                           2004                                           2,118,000 
 1,500,000       BBB+/A3   Fleet/Norstar Financial Group, Sub. Notes, 
                           9.9%, 2001                                     1,684,560 
 1,000,000         A-/A3   Mellon Financial, Sub. Deb., 9.75%, 2001       1,111,680 
 1,000,000       AA-/Aa3   National Westminster Bancorp, Inc., Gtd. 
                           Cap. Notes, 9.375%, 2003                       1,139,900 

The accompanying notes are an integral part of these financial statements.

                                      11 
<PAGE> 

Pioneer Bond Fund

SCHEDULE OF INVESTMENTS 12/31/96 (continued) 


                           Banks - (continued) 
$ 500,000          AA-/A1  Republic New York Corp., Sub. Notes, 9.3%, 
                           2021                                        $    601,680 
                                                                       ------------- 
                           Total Banks (Cost $16,171,334)              $ 17,033,003 
                                                                       ------------- 
                           Utilities - 5.1% 
  500,000         AAA/Aaa  Cajun Electric Power, Cooperative Utility 
                           Trust, 10.125%, 2019                        $    546,945 
2,000,000        BBB/Baa2  Commonwealth Edison, First Mortgage Bonds, 
                           9.75%, 2020                                    2,214,040 
1,000,000            A/A2  Virginia Electric Power, 8.75%, 2021           1,072,030 
1,000,000           A-/A3  ONEOK, Inc., Deb., 9.7%, 2019                  1,097,450 
1,000,000       BBB+/Baa1  GTE Corp., Deb., 10.3%, 2017                   1,082,450 
                                                                       ------------- 
                           Total Utilities (Cost $5,850,410)           $  6,012,915 
                                                                       ------------- 
                           Foreign - 6.9% 
2,000,000         AAA/Aaa  British Telecom Finance, Deb., 9.625%, 2019 $  2,213,320 
1,000,000         AAA/Aaa  Inter-American Development Bank, Notes, 
                           9.45%, 1998                                    1,053,100 
2,000,000         AAA/Aaa  International Bank for Reconstruction and 
                           Development, Deb., 9.25%, 2017                 2,487,920 
  500,000         AA-/Aa3  Province of Ontario, 15.75%, 2012                540,450 
1,000,000         BBB+/A2  Province of Saskatchewan, 9.375%, 2020         1,234,000 
  500,000         AAA/Aaa  Tokyo (Metropolis of), Gtd. Bonds, 10.375%, 
                           1997                                             516,665 
                                                                       ------------- 
                           Total Foreign (Cost $7,779,587)             $  8,045,455 
                                                                       ------------- 
                           TOTAL INVESTMENT IN SECURITIES (Cost 
                           $114,168,672)                               $116,847,491 
                                                                       ------------- 
                           TEMPORARY CASH 
                           INVESTMENT - 0.5% 
                           Commercial Paper - 0.5% 
  585,000                  Household Finance Corp., 6.55%, 1/2/97      $    585,000 
                                                                       ------------- 
                           TOTAL TEMPORARY CASH INVESTMENT (Cost 
                           $585,000)                                   $    585,000 
                                                                       ------------- 
                           TOTAL INVESTMENT IN SECURITIES AND TEMPORARY 
                           CASH INVESTMENT - 100% 
                           (Cost $114,753,672) (a)(b)                  $117,432,491 
                                                                       ------------- 
</TABLE>

The accompanying notes are an integral part of these financial statements.

                                      12 
<PAGE> 

Pioneer Bond Fund

(a) At December 31, 1996, the net unrealized gain on investments, based 
    on cost for federal income tax purposes of $114,753,672, was as follows: 
<TABLE>
<CAPTION>
<S>                                                                  <C>
    Aggregate gross unrealized gain for all investments in which
     there is an excess of value over tax cost                       $ 4,064,858 
    Aggregate gross unrealized loss for all investments in which 
     there is an excess of tax cost over value                        (1,386,039) 
                                                                --------------- 
Net unrealized gain                                                  $ 2,678,819 
                                                                --------------- 
</TABLE>

(b) At June 30, 1996, the Fund had a net capital loss carryforward of 
    approximately $3,200,964 which will expire between 1998 and 2004 if 
    not utilized. 

   Note: The Fund's investments in mortgage-backed securities of the 
         Government National Mortgage Association (GNMA) are interests in 
         separate pools of mortgages. All separate investments in this issuer 
         which have the same coupon rate have been aggregated for the purpose 
         of presentation in this schedule of investments. 

   Purchases and sales of securities (excluding temporary cash investments) 
for the six months ended December 31, 1996 were as follows: 
<TABLE>
<CAPTION>
                                Purchases       Sales 
                             --------------- ------------ 
<S>                            <C>            <C>
Long-term U.S. Government      $18,497,500    6,755,974 
Other Long-term Securities       1,493,775    1,580,759 
</TABLE>

The accompanying notes are an integral part of these financial statements.


                                      13 
<PAGE> 

Pioneer Bond Fund 

BALANCE SHEET 12/31/96 
<TABLE>
<CAPTION>
<S>                                                         <C>
ASSETS: 
Investment in securities, at value (including temporary 
  cash investments of $585,000) (cost $114,753,672)         $117,432,491 
Receivables - 
 Fund shares sold                                                492,067 
 Dividends and interest                                        2,693,907 
Other                                                             14,918 
                                                        -------------------- 
  Total assets                                              $120,633,383 
                                                        -------------------- 
LIABILITIES: 
Payables - 
 Fund shares repurchased                                    $    105,009 
 Dividends                                                       185,716 
Due to bank                                                       90,487 
Due to affiliates                                                151,919 
Accrued expenses                                                  44,658 
                                                        -------------------- 
  Total liabilities                                         $    577,789 
                                                        -------------------- 
NET ASSETS: 
Paid-in capital                                             $121,328,031 
Accumulated undistributed net investment income                   16,973 
Accumulated net realized loss on investments                  (3,968,229) 
Net unrealized gain on investments                             2,678,819 
                                                        -------------------- 
  Total net assets                                          $120,055,594 
                                                        -------------------- 

Net Asset Value Per Share: 
(Unlimited number of shares authorized) 
Class A (based on $100,471,981/10,983,945 shares)           $       9.15 
                                                        -------------------- 
Class B (based on $18,709,280/2,053,288 shares)             $       9.11 
                                                        -------------------- 
Class C (based on $874,333/95,985 shares)                   $       9.11 
                                                        -------------------- 

Maximum Offering Price: 
Class A                                                     $       9.58 
                                                        -------------------- 

</TABLE>

The accompanying notes are an integral part of these financial statements.


                                      14 
<PAGE> 


Pioneer Bond Fund
STATEMENT OF OPERATIONS 
For the Six Months Ended 12/31/96 
<TABLE>
<CAPTION>
INVESTMENT INCOME: 
<S>                                                         <C>         <C>
Interest                                                                $4,869,865 
                                                                       ------------- 
EXPENSES: 
Management fees                                             $300,285 
Transfer agent fees 
 Class A                                                      95,817 
 Class B                                                      21,659 
 Class C                                                       1,000 
Distribution fees 
 Class A                                                     112,440 
 Class B                                                      86,524 
 Class C                                                       2,952 
Accounting                                                    38,005 
Custodian fees                                                15,098 
Registration fees                                             28,635 
Professional fees                                             30,590 
Printing                                                       1,940 
Fees and expenses of nonaffiliated trustees                    8,622 
Miscellaneous                                                  7,653 
                                                           ----------- 
  Total expenses                                                        $  751,220 
  Less fees paid indirectly                                                (10,655) 
                                                                       ------------- 
  Net expenses                                                          $  740,565 
                                                                       ------------- 
  Net investment income                                                 $4,129,300 
                                                                       ------------- 

REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS: 
Net realized loss on investments                                        $ (252,999) 
Change in net unrealized gain on investments                             1,103,276 
                                                                       ------------- 
 Net gain on investments                                                $  850,277 
                                                                       ------------- 
 Net increase in net assets resulting from operations                   $4,979,577 
                                                                       ------------- 

</TABLE>

The accompanying notes are an integral part of these financial statements.


                                      15 
<PAGE> 

Pioneer Bond Fund

STATEMENTS OF CHANGES IN NET ASSETS 
For the Six Months Ended 12/31/96 and the Year Ended 6/30/96

<TABLE>
<CAPTION>
                                                             Six Months 
                                                                Ended        Year Ended 
                                                              12/31/96         6/30/96 
<S>                                                         <C>             <C>
FROM OPERATIONS: 
Net investment income                                       $  4,129,300    $  7,957,548 
Net realized loss on investments                                (252,999)       (759,570) 
Change in net unrealized gain on investments                   1,103,276      (2,778,133) 
                                                          -------------------------------- 
 Net increase in net assets resulting from operations       $  4,979,577    $  4,419,845 
                                                          -------------------------------- 

DISTRIBUTIONS TO SHAREHOLDERS: 
Net investment income: 
 Class A ($0.32 and $0.64 per share, respectively)          $ (3,555,364)   $ (7,298,352) 
 Class B ($0.26 and $0.57 per share, respectively)              (489,702)       (714,880) 
 Class C ($0.26 and $0.22 per share, respectively)               (16,771)         (4,649) 
In excess of net investment income: 
 Class B ($0.00 and $0.01 per share, respectively)                     -         (34,464) 
 Class C ($0.00 and $0.01 per share, respectively)                     -            (189) 
                                                          -------------------------------- 
  Total distributions to shareholders                       $ (4,061,837)   $ (8,052,534) 
                                                          -------------------------------- 
FROM FUND SHARE TRANSACTIONS: 
Net proceeds from sale of shares                            $ 16,697,845    $ 32,345,460 
Reinvestment of distributions                                  2,942,856       5,865,063 
Cost of shares repurchased                                   (17,645,279)    (34,931,359) 
                                                          -------------------------------- 
 Net increase in net assets resulting from 
  fund share transactions                                   $  1,995,422    $  3,279,164 
                                                          -------------------------------- 
 Net increase (decrease) in net assets                      $  2,913,162    $   (353,525) 

NET ASSETS: 
Beginning of period                                          117,142,432     117,495,957 
                                                          -------------------------------- 
End of period (including accumulated undistributed/ 
  (distributions in excess of) net investment income of 
  $16,973 and ($50,490), respectively)                      $120,055,594    $117,142,432 
                                                          -------------------------------- 
</TABLE>

<TABLE>
<CAPTION>
                                  12/96 Shares    12/96 Amount    6/96 Shares     6/96 Amount 
<S>                                <C>            <C>              <C>            <C>
Class A 
Shares sold                         1,072,909     $  9,773,226      2,099,659     $ 19,598,057 
Reinvestment of distributions         286,071        2,607,186        574,935        5,351,873 
Less shares repurchased            (1,604,807)     (14,608,393)    (3,229,151)     (30,032,780) 
                                ----------------------------------------------- ---------------- 
  Net decrease                       (245,827)    $ (2,227,981)      (554,557)    $ (5,082,850) 
                                ----------------------------------------------- ---------------- 
Class B 
Shares sold                           699,417     $  6,327,465      1,330,447     $ 12,402,112 
Reinvestment of distributions          35,429          321,483         55,012          508,688 
Less shares repurchased              (326,575)      (2,953,727)      (528,935)      (4,897,315) 
                                ----------------------------------------------- ---------------- 
  Net increase                        408,271     $  3,695,221        856,524     $  8,013,485 
                                ----------------------------------------------- ---------------- 
Class C* 
Shares sold                            65,630     $    597,154         37,622     $    345,291 
Reinvestment of distributions           1,560           14,187            497            4,502 
Less shares repurchased                (9,183)         (83,159)          (141)          (1,264) 
                                ----------------------------------------------- ---------------- 
  Net increase                         58,007     $    528,182         37,978     $    348,529 
                                ----------------------------------------------- ---------------- 
</TABLE>

   *Class C shares were first publicly offered on January 31, 1996. 

The accompanying notes are an integral part of these financial statements.

                                      16 
<PAGE> 

Pioneer Bond Fund

FINANCIAL HIGHLIGHTS 12/31/96 




<TABLE>
<CAPTION>
                                       Six Months    Year Ended   Year Ended   Year Ended   Year Ended   Year Ended 
                                     Ended 12/31/96    6/30/96      6/30/95     6/30/94      6/30/93      6/30/92 
<S>                                     <C>           <C>          <C>          <C>          <C>          <C>
CLASS A 
Net asset value, beginning of 
  period                                $   9.08      $   9.35     $   9.04     $   9.81     $   9.37     $   8.99 
                                    ---------------- ------------ ------------ ------------ ------------ ------------ 
Increase (decrease) from investment 
  operations: 
 Net investment income                  $   0.32      $   0.64     $   0.68     $   0.67     $   0.70     $   0.74 
 Net realized and unrealized gain 
  (loss) on investments                     0.07         (0.27)        0.31        (0.77)        0.44         0.39 
                                    ---------------- ------------ ------------ ------------ ------------ ------------ 
  Net increase (decrease) from 
  investment operations                 $   0.39      $   0.37     $   0.99     $  (0.10)    $   1.14     $   1.13 
Distributions to shareholders: 
 Net investment income                     (0.32)        (0.64)       (0.68)       (0.67)       (0.70)       (0.75) 
                                    ---------------- ------------ ------------ ------------ ------------ ------------ 
Net increase (decrease) in net 
  asset value                           $   0.07      $  (0.27)    $   0.31     $  (0.77)    $   0.44     $   0.38 
                                    ---------------- ------------ ------------ ------------ ------------ ------------ 
Net asset value, end of period          $   9.15      $   9.08     $   9.35     $   9.04     $   9.81     $   9.37 
                                    ---------------- ------------ ------------ ------------ ------------ ------------ 
Total return*                               4.37%         4.02%       11.48%       (1.26)%      12.67%       13.03% 
Ratio of net expenses to average 
  net assets                                1.13% **+     1.19%+       1.14%        1.05%        1.10%        1.09% 
Ratio of net investment income to 
  average net assets                        7.01% **+     6.80%+       7.55%        6.93%        7.37%        8.04% 
Portfolio turnover rate                       15% **        39%          37%          39%          37%          17% 
Net assets, end of period (in 
  thousands)                            $100,472      $101,957     $110,158     $106,659     $112,900     $102,503 
Ratios assuming reduction for fees 
  paid indirectly: 
 Net expenses                               1.11% **      1.18%           -            -            -            - 
 Net investment income                      7.03% **      6.81%           -            -            -            - 
</TABLE>
*  Assumes  initial  investment  at net asset value at the beginning of each
period, reinvestment of 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.  
** Annualized.  
+  Ratio assuming no reduction for fees paid indirectly.


The accompanying notes are an integral part of these financial statements.

                                      17 
<PAGE> 

Pioneer Bond Fund

FINANCIAL HIGHLIGHTS 12/31/96 
<TABLE>
<CAPTION>
                                                 Six Months     Year Ended   Year Ended   4/4/94 to 
                                               Ended 12/31/96    6/30/96      6/30/95      6/30/94 
<S>                                                <C>           <C>           <C>         <C> 
CLASS B 
Net asset value, beginning of period               $  9.02       $  9.31       $ 9.02      $ 9.23 
                                              ---------------- ------------ ------------ ----------- 
Increase (decrease) from investment 
  operations: 
 Net investment income                             $  0.28       $  0.57       $ 0.60      $ 0.14 
 Net realized and unrealized gain  (loss) on 
  investments                                         0.07         (0.28)        0.31       (0.21) 
                                              ---------------- ------------ ------------ ----------- 
  Net increase (decrease) from   investment 
  operations                                       $  0.35       $  0.29       $ 0.91      $(0.07) 
Distributions to shareholders: 
 Net investment income                               (0.26)        (0.57)       (0.62)      (0.14) 
 In excess of net investment income                      -         (0.01)           -           - 
                                              ---------------- ------------ ------------ ----------- 
Net increase (decrease) in net asset value         $  0.09       $ (0.29)      $ 0.29      $(0.21) 
                                              ---------------- ------------ ------------ ----------- 
Net asset value, end of period                     $  9.11       $  9.02       $ 9.31      $ 9.02 
                                              ---------------- ------------ ------------ ----------- 
Total return*                                         3.93%         3.15%       10.57%      (0.73)% 
Ratio of net expenses to average net assets           1.97% **+     1.96%+       1.97%       1.92% ** 
Ratio of net investment income to average net 
  assets                                              6.16% **+     6.01%+       6.60%       6.09% ** 
Portfolio turnover rate                                 15% **        39%          37%         39% 
Net assets, end of period (in thousands)           $18,709       $14,843       $7,338      $1,212 
Ratios assuming reduction for fees paid 
  indirectly: 
 Net expenses                                         1.96% **      1.94%           -           - 
 Net investment income                                6.17% **      6.03%           -           - 
</TABLE>


 * Assumes initial investment at net asset value at the beginning of each 
   period, reinvestment of 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. 
** Annualized. 
+ Ratio assuming no reduction for fees paid indirectly. 

The accompanying notes are an integral part of these financial statements.

                                      18 
<PAGE> 

Pioneer Bond Fund

FINANCIAL HIGHLIGHTS 12/31/96 
<TABLE>
<CAPTION>
                                                            Six Months     1/31/96 to 
                                                          Ended 12/31/96    6/30/96 
<S>                                                           <C>            <C>
CLASS C (a) 
Net asset value, beginning of period                          $ 9.02         $ 9.54 
                                                         ---------------- ------------ 
Increase (decrease) from investment operations: 
 Net investment income                                        $ 0.28         $ 0.23 
 Net realized and unrealized gain (loss) on  investments        0.07          (0.52) 
                                                         ---------------- ------------ 
  Net increase (decrease) from investment   operations        $ 0.35         $(0.29) 
Distributions to shareholders: 
 Net investment income                                         (0.26)         (0.22) 
 In excess of net investment income                                -          (0.01) 
                                                         ---------------- ------------ 
Net increase (decrease) in net asset value                    $ 0.09         $(0.52) 
                                                         ---------------- ------------ 
Net asset value, end of period                                $ 9.11         $ 9.02 
                                                         ---------------- ------------ 
Total return*                                                   3.93%         (3.00)% 
Ratio of net expenses to average net assets                     2.06%**+       2.18%**+ 
Ratio of net investment income to average net assets            6.09%**+       5.79%**+ 
Portfolio turnover rate                                           15%**          39% 
Net assets, end of period (in thousands)                      $  874         $  343 
Ratios assuming reduction for fees paid indirectly: 
 Net expenses                                                   2.04%**        2.13%** 
 Net investment income                                          6.11%**        5.84%** 
</TABLE>


(a) Class C shares were first publicly offered on January 31, 1996. 
 * Assumes initial investment at net asset value at the beginning of each 
   period, reinvestment of 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. 
** Annualized. 
+ Ratio assuming no reduction for fees paid indirectly. 

The accompanying notes are an integral part of these financial statements.

                                      19 
<PAGE> 

Pioneer Bond Fund 

NOTES TO FINANCIAL STATEMENTS 12/31/96 

1. Organization and Significant Accounting Policies 

Pioneer Bond Fund (the Fund) is a Massachusetts business trust registered 
under the Investment Company Act of 1940 as a diversified, open-end 
management investment company. The investment objective of the Fund is to 
seek current income from a high quality portfolio, consistent with the 
preservation of capital. 

The Fund offers three classes of shares - Class A, Class B, and Class C 
shares. Class C shares were first publicly offered on January 31, 1996. The 
shares of Class A, Class B, and Class C each represent an interest in the 
same portfolio of investments of the Fund and have equal rights to voting, 
redemptions, dividends and liquidation, except that each class of shares can 
bear different transfer agent and distributions fees and have exclusive 
voting rights with respect to the distribution plans that have been adopted 
by Class A, Class B, and Class C shareholders, respectively. 

The Fund's financial statements have been prepared in conformity with 
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 revenues and expenses during the reporting periods. 
Actual results could differ from those estimates. The following is a summary 
of significant accounting policies consistently followed by the Fund, which 
are in conformity with those generally accepted in the investment company 
industry: 

A. Security Valuation 

Security transactions are recorded on trade date. Securities are valued based 
on valuations furnished by an independent pricing service that utilizes a 
matrix system. These matrix systems reflect such factors as security prices, 
yields, maturities, and ratings and are supplemented by dealer and exchange 
quotations and fair market value information from other sources, as required. 
Principal amounts of mortgage-backed securities are adjusted for monthly 
paydowns. Premium and discount 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. Temporary cash investments 
are valued at amortized cost. 

Gains and losses on sales of investments are calculated on the identified 
cost method for both financial reporting and federal income tax purposes. It 
is the Fund's practice to first select for sale those securities 

                                      20 
<PAGE> 
Pioneer Bond Fund

that have the highest cost and also qualify for long-term capital gain or 
loss treatment for 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 
shareholders. Therefore, no federal income tax provision is required. 

C. Fund Shares 

The Fund records sales and repurchases of its shares on trade date. Net 
losses, if any, as a result of cancellations are absorbed by Pioneer Funds 
Distributor, Inc. (PFD), the principal underwriter for the Fund and an 
indirect subsidiary of The Pioneer Group, Inc. (PGI). PFD earned $15,010 in 
underwriting commissions on the sale of fund shares during the six months 
ended December 31, 1996. 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 paid by the Fund, if any, with respect to each class 
of shares are calculated in the same manner, at the same time, and in the 
same amount, except that Class A, Class B, and Class C shares can bear 
different transfer agent and distribution fees. 

D. Class Allocations 

Distribution fees are calculated based on the average daily net asset value 
attributable to Class A, Class B, and Class C shares of the Fund, 
respectively. Shareholders of each class share all expenses and fees paid to 
the transfer agent, Pioneering Services Corporation (PSC), for their 
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). 
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. 

2. Management Agreement 

Pioneering Management Corporation (PMC), the Fund's investment adviser, 
manages the Fund's portfolio, and is a wholly owned subsidiary of PGI. 
Management fees are calculated daily at the annual rate of 0.50% of the 
Fund's average daily net assets. 

                                      21 
<PAGE> 

Pioneer Bond Fund

NOTES TO FINANCIAL STATEMENTS 12/31/96 (continued) 

In addition, under the management agreement, certain other services and 
costs, including accounting, regulatory reporting and insurance premiums, are 
paid by the Fund. At December 31, 1996, $58,215 was payable to PMC related to 
management fees and certain other services

3. Transfer Agent 

PSC, a wholly owned subsidiary of PGI, provides substantially all transfer 
agent and shareholder services to the Fund at negotiated rates. Included in 
due to affiliates is $20,110 in transfer agent fees payable to PSC at 
December 31, 1996. 

4. Distribution Plans 

The Fund adopted a Plan of Distribution for each class of shares (Class A 
Plan, Class B Plan and Class C Plan) in accordance with Rule 12b-1 of the 
Investment Company Act of 1940. Pursuant to Class A Plan, the fund pays PFD a 
service fee of up to 0.25% of the Fund's average daily net assets in 
reimbursement of its actual expenditures to finance activities primarily 
intended to result in the sale of Class A shares. Pursuant to Class B Plan 
and Class C Plan, the Fund pays PFD 1.00% of the average daily net assets 
attributable to each class of shares. The fee 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. Included in due to affiliates is $73,594 in 
distribution fees payable to PFD at December 31, 1996. 

In addition, redemptions of each class of 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 one 
year of purchase. Class B shares that are redeemed within six years of 
purchase are subject to a CDSC at declining rates beginning at 4.0%, based on 
the lower of cost or market value of shares being redeemed. Redemptions of 
Class C shares within one year of purchase are subject to a CDSC of 1.00%. 
Proceeds from the CDSC are paid to PFD. For the six months ended December 31, 
1996, CDSCs in the amount of $45,435 were paid to PFD. 

5. Expense Offsets 

The Fund has entered into certain expense offset arrangements resulting in a 
reduction in the Fund's total expenses. For the six months ended December 31, 
1996, the Fund's expenses were reduced by $10,655 under such arrangements. 

                                      22 
<PAGE> 

Pioneer Bond Fund

REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS 

To the Shareholders and the Board of Trustees of Pioneer Bond Fund: 


We have audited the accompanying balance sheet of Pioneer Bond Fund, 
including the schedule of investments, as of December 31, 1996, and the 
related statement of operations, the statements of changes in net assets and 
financial highlights for the periods presented. These financial statements 
and financial highlights are the responsibility of the Fund's management. Our 
responsibility is to express an opinion on these financial statements and 
financial highlights based on our audits. 


We conducted our audits in accordance with generally accepted auditing 
standards. Those standards require that we plan and perform the audit to 
obtain reasonable assurance about whether the financial statements and 
financial highlights are free of material misstatement. An audit includes 
examining, on a test basis, evidence supporting the amounts and disclosures 
in the financial statements. Our procedures included confirmation of 
securities owned as of December 31, 1996 by correspondence with the 
custodian. An audit also includes assessing the accounting principles used 
and significant estimates made by management, as well as evaluating the 
overall financial statement presentation. We believe that our audits provide 
a reasonable basis for our opinion. 

In our opinion, the financial statements and financial highlights referred 
to above present fairly, in all material respects, the financial position of 
Pioneer Bond Fund as of December 31, 1996, the results of its operations, the 
changes in its net assets and financial highlights for the periods presented, 
in conformity with generally accepted accounting principles. 

ARTHUR ANDERSEN LLP 

Boston, Massachusetts 
February 3, 1997 

                                      23 
<PAGE> 

Pioneer Bond Fund 

TRUSTEES, OFFICERS AND SERVICE PROVIDERS 

Trustees
John F. Cogan, Jr. 
Richard H. Egdahl, M.D. 
Margaret B.W. Graham 
John W. Kendrick 
Marguerite A. Piret 
David D. Tripple 
Stephen K. West 
John Winthrop 

Officers 
John F. Cogan, Jr., Chairman and 
 President 
David D. Tripple, Executive Vice President 
Sherman B. Russ, Vice President 
William H. Keough, Treasurer 
Joseph P. Barri, Secretary 

Investment Adviser 
Pioneering Management Corporation 

Custodian 
Brown Brothers Harriman & Co. 

Independent Public Accountants 
Arthur Andersen LLP 

Principal Underwriter 
Pioneer Funds Distributor, Inc. 

Legal Counsel 
Hale and Dorr LLP 

Shareholder Services and Transfer Agent 
Pioneering Services Corporation 

                                      24 
<PAGE> 

                           This page for your notes. 

                                      25 
<PAGE> 

PROGRAMS AND SERVICES FOR PIONEER SHAREOWNERS 

Your investment representative can give you additional information on 
Pioneer's programs and services. If you want to order literature on any of 
the following items directly, simply call Pioneer at 1-800-225-6292. 

FactFoneSM 
Our automated account information service, available to you 24 hours a day, 
seven days a week. FactFone gives you a quick and easy way to check fund 
share prices, yields, dividends and distributions, as well as information 
about your own account. Simply call 1-800-225-4321. For specific account 
information, have your 13-digit account number and four-digit personal 
identification number at hand. 

90-Day Reinstatement Privilege (for Class A Shares)
Enables you to reinvest all or a portion of the money you redeem from your 
Pioneer account - without paying a sales charge - within 90 days of your 
redemption. You have the choice of investing in any Pioneer fund, as long as 
you meet its minimum investment requirement. 

Investomatic Plan 
An easy and convenient way for you to invest on a regular basis. All you need 
to do is authorize a set amount of money to be moved out of your bank account 
into the Pioneer fund of your choice. Investomatic also allows you to change 
the dollar amount, frequency and investment date right over the phone. By 
putting aside affordable amounts of money regularly, you can build a 
long-term investment - without sacrificing your current standard of living. 

Payroll Investment Program (PIP) 
Lets you invest in a Pioneer fund directly through your paycheck. All that's 
involved is for your employer to fill out an authorization form allowing 
Pioneer to deduct from participating employees' paychecks. You specify the 
dollar amount you want to invest into the Pioneer fund(s) of your choice. 

                                      26 
<PAGE> 

Automatic Exchange Program 
A simple way to move money from a money market or bond fund into a stock fund 
over a period of time. Just invest a lump sum in a Pioneer money market fund 
or bond fund. Then, select the Pioneer equity fund or funds you wish to 
invest in, and choose the amounts and dates for Pioneer to sell shares of 
your money market or bond fund and use the proceeds to buy shares of the 
Pioneer equity fund you have chosen. Over time, your original investment will 
be shifted to your Pioneer equity fund. 

Directed Dividends 
Lets you invest cash dividends from one Pioneer fund to an account in another 
Pioneer fund with no sales charge or fee. Simply fill out the applicable 
information on a Pioneer Account Options Form. (This program is available for 
dividend payments only; capital gains distributions are not eligible at this 
time.) 

Direct Deposit 
Lets you move money into your bank account using electronic funds transfer 
(EFT). EFT moves your money faster than you would receive a check, eliminates 
unnecessary paper and mail, and avoids lost checks. Simply fill out a Pioneer 
Direct Deposit Form, giving your instructions. 

Systematic Withdrawal Plan (SWP) 
Lets you establish automatic withdrawals from your account at set intervals. 
You decide the frequency and the day of the month you want. Pioneer will send 
the proceeds by check to the address you designate, or electronically to your 
bank account. You also can authorize Pioneer to make the redemptions payable 
to someone else. (SWPs are available only for accounts with a value of 
$10,000 or more.) 

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The Pioneer Family of Mutual Funds 

Growth Funds 
Global/International 
Pioneer Emerging Markets Fund 
Pioneer Europe Fund 
Pioneer Gold Shares 
Pioneer India Fund 
Pioneer International Growth Fund 
Pioneer World Equity Fund 

United States 
Pioneer Capital Growth Fund 
Pioneer Growth Shares 
Pioneer Mid-Cap Fund 
Pioneer Small Company Fund 

Growth and Income Funds 
Pioneer Balanced Fund 
Pioneer Equity-Income Fund 
Pioneer Fund 
Pioneer Real Estate Shares 
Pioneer II 

Income Funds Taxable
Pioneer America 
Income Trust 
Pioneer Bond Fund 
Pioneer Short-Term Income Trust* 

Tax-Exempt 
Pioneer Intermediate Tax-Free Fund 
Pioneer Tax-Free Income Fund 

Money Market Fund 
Pioneer Cash Reserves Fund 

*Offers Class A and B Shares only 

                                      28 
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                           This page for your notes. 

                                       
<PAGE> 

HOW TO CONTACT PIONEER 

We are pleased to offer a variety of convenient ways for you to contact us 
for assistance or information. 

You can call us for: 

Account information, including existing accounts, 
new accounts, prospectuses, applications 
and service forms                                            1-800-225-6292 

FactFoneSM for automated fund yields, prices, 
account information and transactions                         1-800-225-4321 

Retirement plans information                                 1-800-622-0176 

Telecommunications Device for the Deaf (TDD)                 1-800-225-1997 

Or write to us at: 

Pioneering Services Corporation 
60 State Street 
Boston, Massachusetts 02109 

Our toll-free fax                                            1-800-225-4240 

Our Internet e-mail address                            [email protected] 
(for general questions about Pioneer only) 

This report must be preceded or accompanied by a current 
Fund prospectus. 

[Pioneer Logo]

Pioneer Funds Distributor, Inc. 
60 State Street 
Boston, Massachusetts 02109 

0297-3931 
(c) Pioneer Funds Distributor, Inc. 

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