PIONEER INCOME FUND INC/MA
N-30D, 1996-08-26
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                                                                [Pioneer Logo]

Pioneer 
Income
Fund

Semiannual Report
June 30, 1996
<PAGE>
 
Pioneer Income Fund

Dear Shareowners:

The first six months of 1996 saw mixed results in U.S. financial markets.
Corporate earnings generally remained strong, if no longer increasing robustly,
but interest rates moved up noticeably. Consequently, prices of different types
of securities went in different directions. Many stocks continued to perform
well, particularly those in high-growth sectors. Interest-rate-sensitive
securities such as utility and insurance stocks tended to lag or even decline in
price, and bonds fell across the board.

It was an exciting period for speculators in "hot new issues" in software and
networking technology, biotechnology and other glamorous areas. Managing your
Fund, which concentrates on bonds and higher dividend-paying stocks, we found
ourselves in what seemed at times like an investment backwater. As we write, a
serious "correction" appears to be in progress, and much of the unwarranted
differential in performance between market sectors has vanished. What the rest
of the year holds in store we do not know, but we are hopeful financial markets
will not fluctuate quite so wildly and that relative valuations will again
become more reasonable.

                            HOW YOUR FUND PERFORMED

Following are the results for Pioneer Income Fund for the six months ended 
June 30, 1996:

                                 CLASS A SHARES

*  The Fund provided a 5.47% 30-day yield on June 30, 1996, based on net asset
   value.

*  Shareowners received a total of $0.32 per share in income dividends during
   the six months.

*  Net asset value was $10.09 per share on June 30, 1996, versus $10.30 at
   December 31, 1995. After adjusting for the payment of distributions, the
   Fund's share price was little changed.

*  The Fund produced a six-month total return of 1.11% based on net asset value,
   and -3.48% for shareowners who paid the maximum 4.5% sales charge at the
   beginning of the period. Total return assumes reinvestment of distributions
   at net asset value.

                                 CLASS B SHARES

*  Class B shares offered a 30-day yield of 5.20% as of June 30.

*  Income dividends paid to shareowners during the six months totaled $0.28 per
   share.

*  Net asset value per share was $10.06 at June 30, versus $10.27 at December
   31, 1995. After adjusting for the payment of distributions, the Fund's share
   price was little changed.

*  For the six months, the Fund provided a total return of 0.71% at net asset
   value. If shares were sold and the maximum 4% contingent deferred sales
   charge paid at the end of the period, total return was -3.21%. Total return
   assumes reinvestment of all distributions.

                                 CLASS C SHARES

The Fund introduced Class C shares on January 31, 1996. We report the following
results since that time:

*  On June 30, Class C shares provided a 30-day yield of 7.37%.

*  Since January 31, shareowners received $0.27 per share in income dividends.


<PAGE>

*  Net asset value was $10.09 per share on June 30, versus $10.39 on January 31.

*  The Fund generated a total return of -0.26% if shares were held throughout
   the abbreviated period, and -1.23% if shares were sold and the 1% contingent
   deferred sales charged deducted on June 30.

By way of comparison, the unmanaged Lehman Brothers Corporate Bond Index
recorded a total return of -2.53% for the six months ended June 30, 1996. The
unmanaged Standard & Poor's 500 Index of stocks rose by 10.08% over the period.

The following table shows the Fund's returns over longer time periods.

- --------------------------------------------------------------------------------
                          AVERAGE ANNUAL TOTAL RETURNS
                            (As of June 30, 1996)

    Class A Shares         Net Asset Value         Public Offering Price*
    --------------         ---------------         ----------------------
      10 Years                  9.02%                     8.51%
      5 Years                   9.22                      8.23
      1 Year                   11.04                      6.06

    Class B Shares            If Held                 If Redeemed**
    --------------            -------                 -------------
    Life-of-Fund
    (4/28/95)                  12.20%                     8.87%
    1 Year                     10.17                      6.17
- --------------------------------------------------------------------------------

                      HOW PIONEER MANAGED YOUR INVESTMENT

The Fund continued to have a balance of about 60% bonds and 30% stocks, with 
10% in "hybrid" instruments such as convertible preferred stocks, 
convertible debentures and real estate investment trusts. 

During the first six months of 1996, bond prices in general moved lower as
yields on United States Treasury securities drifted higher by about 1%. Bond
investors became concerned once again about the potential for price-and-wage
inflation. On a positive note, corporate debt securities, the bulk of the Fund's
fixed-income investments, did not decline in price quite as much as Treasurys.
In addition, issues with medium-range maturities, where the portfolio is
concentrated, did not suffer to the full extent that longer maturity bonds did.
Most, 69%, of the Fund's bonds have an effective maturity of less than 10 years.
Overall, the fixed-income securities in the portfolio have an average effective
maturity of nine years, and an average quality rating of A.

The principal change in bond holdings was an increase in industrial bonds and a
corresponding decrease in utility bonds. We took advantage of the weak market to
add positions in the debt securities of Hook SupeRx, Kansas City Southern
Industries, New America Holdings, Tele-Communications and Tenet Healthcare. We
sold electric-cooperative bonds.

On the stock side, we added a number of positions to give the portfolio more
diversification. Chrysler, the automobile and truck manufacturer, Greif
Brothers, a packaging company, and Gorman-Rupp, a maker of pumps, enhance the
portfolio's cyclical exposure. We substituted Mobil for Texaco in the
oil-and-gas sector. Eastman Kodak, the premier film producer, is in the midst of
an improvement attributable to new management. Among convertible stocks, we sold
the Raymond issue, which had performed very well, and purchased a convertible
preferred issue of Kmart, also a company with new management and the potential
for improvement in earnings.

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

**Reflects deduction of the maximum 4% contingent deferred sales charge at the
  end of the period and assumes reinvestment of all distributions.

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

                                       2
<PAGE>
                                 LOOKING AHEAD

So far, 1996 has been as rocky as 1995 was smooth. Investors should keep in mind
that securities prices do not move steadily but rather fluctuate around "trend
lines" over longer periods of time. Overall, stocks generally reflect the
direction of corporate earnings, and bond prices reflect (inversely) the
direction of interest rates. However, stocks, too, are affected by interest
rates. Corporate borrowing costs are often an important part of company
expenses, and higher bond yields also compete directly with stocks for
investors' hard-earned savings. Pioneer Income Fund, through its diversified
bond and stock portfolio, permits the investor to participate in both markets.

On a final note, we are pleased to announce that we will be giving semiannual
and annual reports a facelift, including easy-to-find and use graphic summaries.
Your annual report dated December 31, 1996, will reflect these enhancements. We
wish to thank all of you who took the time to respond to our questions about
what you want to see in fund reports.

On the following pages, please find the Fund's audited Schedule of Investments
and financial statements as of June 30, 1996. If you do wish to speak to someone
about your investment in Pioneer Income Fund, please contact your investment
representative, or call us directly at 1-800-225-6292. Thank you for your
continuing support.

Respectfully submitted,

/s/John F. Cogan, Jr.

John F. Cogan, Jr.
Chairman and President,
Pioneer Income Fund


                                       3
<PAGE>
Pioneer Income Fund
Schedule of Investments
June 30, 1996

<TABLE>
<CAPTION>
             Standard &
             Poor's/Moody's                                                                                          
Principal    Rating  
   Amount    (unaudited)                                                               Value
- ------------------------------------------------------------------------------------------------
<C>          <C>         <S>                                                       <C>         
                         INVESTMENT IN SECURITIES -- 99.6%
                         DEBT OBLIGATIONS -- 62.3%
                         INDUSTRIALS -- 40.9%
$2,000,000   BB+/Baa3    AMR Corp., 9.75%, 2000 ................................   $  2,158,700
 4,950,000   BB+/Baa3    AMR Corp., 9.88%, 2020 ................................      5,753,335
 2,500,000   BBB/Baa1    Ashland Oil ...........................................      2,751,575
 2,000,000   B+/B1       Bethlehem Steel Corp., 10.375%, 2003 ..................      2,120,000
 2,000,000   BBB-/Baa1   Bowater, Inc., 9.0%, 2009 .............................      2,207,460
 3,000,000   BBB/Baa1    Bowater, Inc., 9.375%, 2021 ...........................      3,459,060
 5,000,000   AA-/A1      BP America, Inc., 10.0%, 2018 .........................      5,492,250
 3,000,000   A/A2        Caterpillar Inc., 9.75%, 2019 .........................      3,352,890
 2,000,000   BBB-/Baa3   Centex Corp., 8.75%, 2007 .............................      2,051,180
 5,000,000   BB+/Baa2    Delta Air Lines Trust, 9.2%, 2014 .....................      5,482,600
 3,000,000   BB-/Ba1     Domtar Inc., 11.25%, 2017 .............................      3,180,000
 4,000,000   BB-/Ba1     Federated Department Stores Inc., 10.0%, 2001 .........      4,210,000
 5,000,000   BBB+/A3     General Motors Corp., 9.4%, 2021 ......................      5,844,250
 4,000,000   BBB-/Baa2   Georgia-Pacific Corp., 9.875%, 2021 ...................      4,332,480
 1,000,000   BBB-/Ba1    Hook-SupeRx, Inc., 10.125%, 2002 ......................      1,068,750
 3,000,000   BBB/Ba1     Joy Technologies Inc., 10.25%, 2003 ...................      3,300,000
 3,000,000   BBB+/Baa2   Kansas City Southern Industries, Inc., 8.8%, 2022 .....      3,119,460
 1,500,000   A/A2        The May Department Stores Co., 9.875%, 2000 ...........      1,644,990
 5,000,000   BBB/Baa3    New America Holdings, Inc., 10.125%, 2012 .............      5,622,500
 4,100,000   BBB/Baa1    Phillips Petroleum Co., 8.86%, 2022 ...................      4,351,945
 1,500,000   BB-/B1      Rexene Corp., 11.75%, 2004 ............................      1,552,500
 1,500,000   BBB/Baa2    Shopko Stores Inc., 9.25%, 2022 .......................      1,571,250
 3,000,000   BB-/B1      Stone Container Corp., 10.75%, 2002 ...................      3,030,000
 2,400,000   BBB-/Ba1    Tele-Communications, Inc., 8.75%, 2023 ................      2,264,448
 2,000,000   BB/Ba1      Tenet Healthcare Corp., 8.625%, 2003 ..................      2,027,500
 2,000,000   B+/Ba3      Tenet Healthcare Corp., 10.125%, 2005 .................      2,110,000
 5,000,000   BBB-/Ba1    Time Warner, Inc., 9.15%, 2023 ........................      5,169,700
 1,000,000   BB-/Ba3     Unisys Corp., 13.5%, 1997 .............................      1,057,500
 8,000,000   BB+/Baa3    USX Corp., 9.375%, 2012 ...............................      8,820,320
 2,000,000   BB-/B1      Viacom International Inc., 10.25%, 2001 ...............      2,140,000
 3,000,000   A/A2        Virginia Electric and Power Co., 8.75%, 2021 ..........      3,144,000
 3,500,000   B/B2        Weirton Steel Corp., 10.75%, 2005 .....................      3,325,000
 2,000,000   BBB-/Ba1    Westinghouse Electric Corp., 8.625%, 2012 .............      1,930,340
                                                                                   ------------
                                                                                   $109,645,983
                                                                                   ------------
</TABLE>

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

                                       4
<PAGE>

Pioneer Income Fund
<TABLE>
Schedule of Investments
June 30, 1996 (Continued)

<CAPTION>
             Standard &
             Poor's/Moody's                                                                                          
Principal    Rating  
   Amount    (unaudited)                                                               Value
- ------------------------------------------------------------------------------------------------
<C>          <C>         <S>                                                       <C>         
                         UTILITIES -- 12.1%
$2,500,000   NR/Aaa      Big Rivers Electric Cooperative, 9.5%, 2017 ...........   $  2,720,925
 2,000,000   AAA/Aaa     Cajun Electric Power Cooperative, 8.92%, 2019 .........      2,190,000
 3,000,000   AAA/Aaa     Cajun Electric Power Cooperative, 9.52%, 2019 .........      3,264,990
 2,000,000   BB+/Baa3    Coastal Corp., 9.625%, 2012 ...........................      2,278,380
 5,000,000   BBB/Baa2    Commonwealth Edison Co., 9.75%, 2020 ..................      5,651,800
 5,000,000   BB+/Ba2     NorAm Energy Corp., 10.0%, 2019 .......................      5,469,700
 7,000,000   AAA/Aaa     Rural Electric Cooperative (Kansas Electric Power),
                           9.73%, 2017 .........................................      7,554,050
 3,000,000   AAA/Aaa     Rural Electric Cooperative (Soyland), 9.7%, 2017 ......      3,236,790
                                                                                   ------------
                                                                                   $ 32,366,635
                                                                                   ------------
                                                                                             
                         BANKS AND FINANCIAL -- 2.9%
 5,000,000   AAA/Aaa     General Electric Capital Corp., 8.85%, 2005 ...........   $  5,524,100
 2,000,000   BBB+/A3     General Motors Acceptance Corp., 8.5%, 2003 ...........      2,129,660
                                                                                   ------------
                                                                                     $7,653,760
                                                                                   ------------
                         U.S. GOVERNMENT OBLIGATIONS -- 4.0%
 1,500,000   AAA/Aaa     United States Treasury Note, 6.375%, 2000 .............   $  1,499,760
 4,000,000   AAA/Aaa     United States Treasury Note, 7.75%, 2001 ..............      4,203,760
 5,000,000   AAA/Aaa     United States Treasury Note, 8.5%, 1997 ...............      5,105,450
                                                                                   ------------
                                                                                   $ 10,808,970
                                                                                    ------------
                         FOREIGN BONDS -- 2.4%
 4,850,000   A+/A2       Hydro-Quebec, 9.75%, 2018 .............................   $  5,376,759
 1,872,868   NR/NR       Mexico City - Toluca Toll Road, 11.0%, 2002, 144A .....      1,114,356
                                                                                   ------------
                                                                                   $  6,491,115
                                                                                   ------------
                         TOTAL DEBT OBLIGATIONS (Cost $166,379,807).............   $166,966,463
                                                                                   ------------
                         CONVERTIBLE BOND -- 0.4%
   990,000               Atlantic Richfield Co., Exchangeable Notes, 
                           9.0%, 1997...........................................   $    975,000
                                                                                   ------------
                         TOTAL CONVERTIBLE BOND (Cost $990,000).................   $    975,000
                                                                                   ------------
</TABLE>

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

                                       5
<PAGE>
Pioneer Income Fund
<TABLE>
Schedule of Investments
June 30, 1996 (Continued)

<CAPTION>
   Shares                                                                              Value
- ------------------------------------------------------------------------------------------------
<C>                      <S>                                                       <C>         
                         PREFERRED STOCKS -- 5.6%
    50,000               Bethlehem Steel, Conv., $3.50, 1996 ...................   $  2,087,500
    50,000               Reynolds Metals Co., Conv., 7.00%, 1996 ...............      2,318,750
    35,000               Kmart Financing Corp., Conv., 7.75%, 2016 .............      1,898,750
   117,000               Elf Overseas, 8.5% ....................................      2,954,250
    10,200               United Dominion Realty (Class A) ......................        258,825
    65,700               Rouse Co., Conv., 6.5%, 1996 ..........................      3,999,488
    38,150               Sprint Corp., Conv., 8.25%, 2000 ......................      1,535,537
                                                                                   ------------
                         TOTAL PREFERRED STOCKS (Cost $14,132,600)                 $ 15,053,100
                                                                                   ------------

                         COMMON STOCKS -- 31.3%
                         CHEMICALS -- 1.2%
    42,000               E.I. du Pont de Nemours and Co. .......................   $  3,323,250
                                                                                   ------------
                         CONSUMER DURABLES -- 2.5%
    27,500               Chrysler Corp. ........................................   $  1,705,000
   125,000               Ford Motor Co. ........................................      4,046,875
    22,600               The May Department Stores Co. .........................        988,750
                                                                                   ------------
                                                                                   $  6,740,625
                                                                                   ------------
                         CONSUMER NON-DURABLES -- 3.0%
    50,000               CPC International, Inc. ...............................   $  3,600,000
   150,000               H.J. Heinz & Co. ......................................      4,556,250
                                                                                   ------------
                                                                                    $ 8,156,250
                                                                                   ------------
                         CONTAINERS -- 0.4%
    30,800               Greif Brothers Corp. (Class A) ........................   $    985,600
                                                                                   ------------
                         ELECTRONICS -- 0.2%
    26,000               DuPont Photomask, Inc. ................................   $    533,000
                                                                                   ------------
                         ENERGY -- 0.3%
     5,700               Atlantic Richfield Co. ................................   $    675,450
                                                                                   ------------
                         FINANCIAL -- 3.8%
    50,000               Boatmen's Bancshares, Inc. ............................   $  2,006,250
   216,300               Huntington Bancshares Inc. ............................      5,164,163
    50,000               Northern Trust Corp. ..................................      2,887,500
                                                                                   ------------
                                                                                    $10,057,913
                                                                                   ------------
                         OIL & GAS EXTRACTION -- 1.0%
    25,000               Mobil Corp. ...........................................   $  2,803,125
                                                                                   ------------
</TABLE>

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

                                       6
<PAGE>

Pioneer Income Fund
<TABLE>
Schedule of Investments
June 30, 1996 (Continued)

<CAPTION>
   Shares                                                                              Value
- ------------------------------------------------------------------------------------------------
<C>                      <S>                                                       <C>         
                         PHOTO/INSTRUMENTATION -- 1.5%
    50,000               Eastman Kodak Co. .....................................   $  3,887,500
                                                                                   ------------
                         PRODUCER GOODS -- 0.3%
    60,000               The Gorman-Rupp Co. ...................................   $    795,000
                                                                                   ------------
                         REAL ESTATE -- 5.8%
   200,000               BRE Properties, Inc. (Class A) ........................   $  3,900,000
   180,100               Carr Realty Corp. .....................................      4,322,400
   120,800               Health Care REIT, Inc. ................................      2,597,200
   333,100               United Dominion Realty Trust, Inc. ....................      4,788,313
                                                                                   ------------
                                                                                   $ 15,607,913
                                                                                   ------------
                                                                                              
                         TELECOMMUNICATIONS -- 7.5%
    96,000               Ameritech Corp. .......................................   $  5,700,000
    39,600               AT & T Corp. ..........................................      2,455,200
   100,000               Nynex Corp. ...........................................      4,750,000
   175,000               Pacific Telesis Group .................................      5,906,250
    40,000               U.S. West, Inc. .......................................      1,275,000
                                                                                   ------------
                                                                                   $ 20,086,450
                                                                                   ------------
                         TRANSPORTATION -- 0.2%
    23,700               Canadian National Railway Co.+.........................   $    435,487
                                                                                   ------------
                         UTILITIES -- 3.6%
   200,000               Allegheny Power System, Inc. ..........................   $  6,175,000
    40,000               Brooklyn Union Gas Co. ................................      1,090,000
    89,200               E'Town Corp. ..........................................      2,475,300
                                                                                   ------------
                                                                                   $  9,740,300
                                                                                   ------------
                         TOTAL COMMON STOCKS (Cost $68,627,177) ................   $ 83,827,863
                                                                                   ------------
                         TOTAL INVESTMENT IN SECURITIES (Cost $250,129,584) ....   $266,822,426
                                                                                   ------------
 Principal
  Amount
- ----------              
                         TEMPORARY CASH INVESTMENT -- 0.4%
                         COMMERCIAL PAPER -- 0.4%
$1,168,000               Ford Motor Credit Co., 5.5%, 7/1/96 ...................   $  1,168,000
                                                                                   ------------
                         TOTAL TEMPORARY CASH INVESTMENT (Cost $1,168,000) .....   $  1,168,000
                                                                                   ------------
                         TOTAL INVESTMENT IN SECURITIES AND
                         TEMPORARY CASH INVESTMENT -- 100.0% 
                         (Cost $251,297,584) (a) ...............................   $267,990,426
                                                                                   ============
</TABLE>

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

                                       7
<PAGE>
Pioneer Income Fund
Schedule of Investments
June 30, 1996 (Continued)
- --------------------------------------------------------------------------------

   + Security purchased on an installment basis. Market value reflects only
     those payments made through June 30, 1996. Additional subscription payment
     of C$10.75 will be required on November 26, 1996.
144A Security exempt from registration under Rule 144A of the Securities Act of
     1933. These securities may be resold in transactions exempt from
     registration, normally to qualified institutional buyers. At June 30, 1996,
     the value of these securities amounted to $1,114,356 or 0.4% of total net
     assets.
  NR Not rated.
 (a) At June 30, 1996, the net unrealized gain on investments based on cost for
     federal income tax purposes of $251,297,584 was as follows:
       Aggregate gross unrealized gain for all investments 
       in which there is an excess of value over tax cost......... $ 21,480,342
       Aggregate gross unrealized loss for all investments
       in which there is an excess of tax cost over value.........   (4,787,500)
                                                                   ------------
       Net unrealized gain........................................ $ 16,692,842
                                                                   ============


     Purchases and sales of securities (excluding temporary cash investments) 
     for the six months ended June 30, 1996 were as follows:
                                                   Purchases        Sales
                                                  -----------    -----------
     Long-term U.S. Government                    $12,162,642    $11,810,156
     Other Long-term Securities                    35,875,349     36,010,031


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

                                       8
<PAGE>
Pioneer Income Fund
Balance Sheet
June 30, 1996

ASSETS:
Investment in securities, at value (including temporary 
  cash investment of $1,168,000) (cost $251,297,584; see 
  Schedule of Investments and Note 1)............................. $267,990,426
Cash .............................................................       61,386
Receivables --
  Investment securities sold......................................    3,309,178
  Fund shares sold ...............................................      257,335
  Dividends and interest .........................................    4,339,230
Other ............................................................        1,115
                                                                   ------------
    Total assets ................................................. $275,958,670
                                                                   ------------
LIABILITIES:
Payables --
  Fund shares repurchased ........................................ $     94,557
  Dividends ......................................................          234
  Due to affiliates (Notes 2, 3 and 4) ...........................      379,215
  Accrued expenses ...............................................       47,890
                                                                   ------------
    Total liabilities ............................................ $    521,896
                                                                   ------------
NET ASSETS:
  Paid-in capital (Note 1) ....................................... $258,034,503
  Distributions in excess of net investment income (Note 1).......     (115,467)
  Accumulated undistributed net realized gain 
    on investments (Note 1) ......................................      824,896
  Net unrealized gain on investments..............................   16,692,842
                                                                   ------------
      Total net assets............................................ $275,436,774
                                                                   ============
NET ASSET VALUE PER SHARE:
  Class A -- (based on $270,398,854 / 26,806,764 shares of 
    beneficial interest outstanding -- unlimited number 
    of shares authorized) ........................................       $10.09
                                                                         ======
  Class B -- (based on $4,520,453 / 449,214 shares of 
    beneficial interest outstanding -- unlimited number 
    of shares authorized) ........................................       $10.06
                                                                         ======
  Class C -- (based on $517,467 / 51,278 shares of 
    beneficial interest outstanding -- 
    unlimited number of shares authorized)........................       $10.09
                                                                         ======

MAXIMUM OFFERING PRICE:
  Class A ........................................................       $10.57
                                                                         ======

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

                                       9
<PAGE>
Pioneer Income Fund
Statement of Operations
For the Six Months Ended June 30, 1996

INVESTMENT INCOME (NOTE 1):
  Dividends (net of foreign taxes withheld of $2,351) ............  $ 2,500,801
  Interest .......................................................    7,586,498
                                                                    -----------
    Total investment income ......................................  $10,087,299
                                                                    -----------
EXPENSES:
  Management fees (Note 2) .......................................  $   693,788
  Distribution fees (Note 4)
    Class A ......................................................      343,975
    Class B ......................................................       16,160
    Class C ......................................................        1,531
  Transfer agent fees (Note 3)
    Class A ......................................................      373,515
    Class B ......................................................        4,092
    Class C ......................................................          397
  Registration fees ..............................................       35,820
  Professional fees ..............................................       18,233
  Accounting (Note 2) ............................................       31,500
  Custodian fees .................................................       22,705
  Printing .......................................................        5,390
  Fees and expenses of nonaffiliated trustees ....................        9,220
  Miscellaneous ..................................................       20,850
                                                                    -----------
    Total expenses ...............................................  $ 1,577,176
    Less fees paid indirectly (Note 5) ...........................      (32,996)
                                                                    -----------
    Net expenses .................................................  $ 1,544,180
                                                                    -----------
      Net investment income ......................................  $ 8,543,119
                                                                    -----------
REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS:
  Net realized gain on investments (Note 1) ......................  $ 1,613,709
  Change in net unrealized gain on investments ...................   (7,211,060)
                                                                    -----------
    Net loss on investments ......................................  $(5,597,351)
                                                                    -----------
      Net increase in net assets resulting from operations .......  $ 2,945,768
                                                                    ===========

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

                                      10
<PAGE>
Pioneer Income Fund
Statements of Changes in Net Assets
For the Six Months Ended June 30, 1996 and the Year Ended December 31, 1995
<TABLE>
<CAPTION>

                                                                        Six Months        Year
                                                                          Ended          Ended
                                                                         June 30,     December 31,
                                                                           1996           1995
                                                                        ----------    ------------
<S>                                                                   <C>             <C>         
FROM OPERATIONS:
  Net investment income ...........................................   $  8,543,119    $ 17,780,699
  Net realized gain on investments ................................      1,613,709       2,830,576
  Change in net unrealized gain/loss on investments ...............     (7,211,060)     33,075,737
                                                                      ------------    ------------
    Net increase in net assets resulting from operations ..........      2,945,768    $ 53,687,012
                                                                      ------------    ------------
DISTRIBUTIONS TO SHAREHOLDERS:
  From net investment income
    Class A ($0.32 and $0.65 per share, respectively) .............     (8,444,663)   $(17,646,195)
    Class B ($0.25 and $0.46 per share, respectively) .............        (89,674)        (40,696)
    Class C ($0.20 and $0.00 per share, respectively) .............         (8,782)           --
  In excess of net investment income
    Class A ($0.00 and $0.00 per share, respectively) .............        (96,324)           --
    Class B ($0.03 and $0.00 per share, respectively) .............        (15,524)           --
    Class C ($0.07 and $0.00 per share, respectively) .............         (3,619)           --
  From net realized gain on investments
    Class A ($0.00 and $0.11 per share, respectively) .............           --        (2,813,942)
    Class B ($0.00 and $0.11 per share, respectively) .............           --           (16,634)
  In excess of net realized gain on investments
    Class A ($0.00 and $0.00 per share, respectively) .............           --           (83,040)
    Class B ($0.00 and $0.00 per share, respectively) .............           --              (491)
                                                                      ------------    ------------
  Decrease in net assets resulting from distributions
    to shareholders ...............................................   $ (8,658,586)   $(20,600,998)
                                                                      ------------    ------------
FROM FUND SHARE TRANSACTIONS:
  Net proceeds from sale of shares ................................     17,949,210    $ 22,365,044
  Net asset value of shares issued to shareholders in
    reinvestment of distributions .................................      7,281,971      17,287,840
  Cost of shares repurchased ......................................    (27,519,994)    (49,270,950)
                                                                      ------------    ------------
    Net decrease in net assets resulting from 
      fund share transactions......................................   $ (2,288,813)   $ (9,618,066)
                                                                      ------------    ------------
    Net increase (decrease) in net assets .........................     (8,001,631)   $ 23,467,948
NET ASSETS:
  Beginning of period .............................................    283,438,405     259,970,457
                                                                      ------------    ------------
  End of period (including distributions in excess of
    net investment income of $115,467 and $0, respectively) .......   $275,436,774    $283,438,405
                                                                      ============    ============
</TABLE>

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

                                      11
<PAGE>
Pioneer Income Fund
Statements of Changes in Net Assets 
For the Six Months Ended June 30, 1996 and the Year Ended December 31, 1995 
(Continued)
<TABLE>
<CAPTION>
                                              Six Months Ended                Year Ended
                                                June 30, 1996              December 31, 1995
                                         --------------------------    --------------------------
                                            Shares        Amount         Shares          Amount
                                         ----------     -----------    ----------     ----------- 
<S>                                      <C>           <C>              <C>          <C>         
CLASS A
  Shares sold ........................    1,412,853    $ 14,461,882     2,103,203    $ 20,546,527
  Shares issued to shareholders in
    reinvestment of distributions ....      715,305       7,185,185     1,747,425      17,240,367
  Less shares repurchased ............   (2,664,057)    (27,262,378)   (5,050,730)    (49,169,717)
                                         ----------     -----------    ----------     ----------- 
    Net decrease .....................     (535,899)   $ (5,615,311)   (1,200,102)   $(11,382,823)
                                         ==========     ===========    ==========     =========== 
CLASS B*
  Shares sold ........................      290,267    $  2,966,920       180,493    $  1,818,517
  Shares issued to shareholders in
    reinvestment of distributions ....        8,950          89,640         4,715          47,473
  Less shares repurchased ............      (25,215)       (256,516)       (9,996)       (101,233)
                                         ----------    ------------    ----------    ------------
    Net increase .....................      274,002    $  2,800,044       175,212    $  1,764,757
                                         ==========    ============    ==========    ============
CLASS C**
  Shares sold ........................       50,672    $    520,408
  Shares issued to shareholders in
    reinvestment of distributions ....          714           7,146
  Less shares repurchased ............         (108)         (1,100)
                                         ----------    ------------
    Net increase .....................       51,278    $    526,454
                                         ==========    ============

<FN>
   *Class B shares were first publicly offered on April 28, 1995.
  **Class C shares were first publicly offered on January 31, 1996.
</FN>
</TABLE>

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

                                      12
<PAGE>
Pioneer Income Fund
Financial Highlights -- Selected Data for a Share Outstanding for the Periods
Presented
<TABLE>
<CAPTION>
                                 Six Months
                                   Ended
                                  June 30,   For the Years Ended December 31,
                                 ----------  --------------------------------------------------------------------------------------
CLASS A                              1996      1995     1994     1993++   1992     1991     1990     1989     1988     1987    1986
                                   ------    ------   ------   ------   ------   ------   ------   ------   ------   ------  ------
<S>                                <C>       <C>      <C>      <C>      <C>      <C>      <C>      <C>      <C>      <C>     <C>   
Net asset value,
  beginning of period              $10.30    $ 9.11   $10.21   $10.13   $10.14   $ 9.14   $ 9.53   $ 8.92   $ 8.67   $ 8.94  $ 9.17
                                   ------    ------   ------   ------   ------   ------   ------   ------   ------   ------  ------
Increase (decrease) from
  investment operations:
  Net investment income            $ 0.32    $ 0.66   $ 0.66   $ 0.65   $ 0.65   $ 0.65   $ 0.70   $ 0.74   $ 0.77   $ 0.76  $ 0.80
  Net realized and unrealized
    gain (loss) on investments      (0.21)     1.29    (1.09)    0.37     0.09     1.00    (0.38)    0.63     0.27    (0.14)   0.04
                                   ------    ------   ------   ------   ------   ------   ------   ------   ------   ------  ------
    Net increase (decrease) from 
      investment operations          0.11    $ 1.95   $(0.43)  $ 1.02   $ 0.74   $  1.65  $ 0.32   $ 1.37   $ 1.04   $ 0.62  $ 0.84
Distributions to 
  shareholders from:
  Net investment income             (0.32)    (0.65)   (0.67)   (0.64)   (0.66)   (0.65)   (0.71)   (0.75)   (0.76)   (0.76)  (0.80)
  Net realized gain                   --      (0.11)     --     (0.30)   (0.09)     --      --      (0.01)   (0.03)   (0.13)  (0.27)
                                   ------    ------   ------   ------   ------   ------   ------   ------   ------   ------  ------
Net increase (decrease) 
  in net asset value               $(0.21)   $ 1.19   $(1.10)  $ 0.08   $(0.01)  $ 1.00  $(0.39)   $ 0.61   $ 0.25   $(0.27) $(0.23)
                                   ------    ------   ------   ------   ------   ------   ------   ------   ------   ------  ------
Net asset value, end of period     $10.09    $10.30   $ 9.11   $10.21   $10.13   $10.14  $ 9.14    $ 9.53   $ 8.92   $ 8.67  $ 8.94
                                   ======    ======   ======   ======   ======   ======  ======    ======   ======   ======  ======
Total return*                        1.11%    22.00%   (4.31%)  10.24%    7.59%   18.62%   3.59%    15.89%   12.29%    6.82%   9.29%
Ratio of net expenses to average 
  net assets                         1.12%**+  1.13%+   1.11%    1.06%    0.99%    1.04%   0.94%     0.78%    0.80%    0.79%   0.77%
Ratio of net investment income 
  to average net assets              6.12%**+  6.58%+   7.07%    6.52%    6.47%    6.73%   7.67%     7.98%    8.55%    8.29%   8.46%
Portfolio turnover rate                35%**     25%      50%      69%      54%      43%     44%       69%      87%     115%     76%
Average commission rate paid per
  exchange listed transaction    $ 0.0579       --       --       --       --        --      --        --       --       --      --
Net assets, end of period 
  (in thousands)                 $270,399 $281,639 $259,970 $296,699 $250,033 $197,184 $166,205 $169,607 $159,212 $149,659 $118,760
Ratios assuming reduction for
  fees paid indirectly:
    Net expenses                     1.10%**  1.11%      --       --       --        --      --        --       --       --      --
    Net investment income            6.14%**  6.60%      --       --       --        --      --        --       --       --      --

<FN>
  + Ratios assuming no reduction for fees paid indirectly.
 ++ Prior to the assumption of the management agreement on December 1, 1993 by Pioneering Management Corporation, the Fund was
    advised by Mutual of Omaha Fund Management Company.
  * 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.
 ** Annualized.
</FN>
</TABLE>
   The accompanying notes are an integral part of these financial statements.

                                      13
<PAGE>
Pioneer Income Fund
Financial Highlights - Selected Data for a Share Outstanding 
for the Periods Presented (Continued)
<TABLE>
<CAPTION>


                                                                    April 28,
                                                   Six Months        1995, to
                                                     Ended         December 31, 
                                                 June 30, 1996         1995
                                                 -------------     ------------
<S>                                               <C>               <C>
CLASS B
Net asset value, beginning of period                 $ 10.27         $  9.55
                                                     -------         -------
Increase (decrease) from
  investment operations:
  Net investment income                              $  0.25         $  0.39
  Net realized and unrealized gain
    (loss) on investments                              (0.18)           0.90
                                                     -------         -------
    Net increase from
      investment operations                          $  0.07         $  1.29
Distributions to shareholders:
  From net investment income                           (0.25)          (0.46)
  In excess of net investment income                   (0.03)           --
  From net realized gain                                --             (0.11)
                                                     -------         -------
Net increase (decrease) in net asset value           $ (0.21)        $  0.72
                                                     -------         -------

Net asset value, end of period                       $ 10.06         $ 10.27
                                                     =======         =======
Total return*                                           0.71%          13.74%
Ratio of net expenses
  to average net assets                                 1.85%**+        1.88%**+
Ratio of net investment income
  to average net assets                                 5.48%**+        5.83%**+
Portfolio turnover rate                                   35%**           25%
Average commission rate paid per
exchange listed transaction                          $0.0579            --
Net assets, end of period (in thousands)             $ 4,520         $ 1,800
Ratios assuming reduction for fees paid indirect
ly:
  Net expenses                                          1.81%**         1.78%**
  Net investment income                                 5.52%**         5.93%**

                                                                January 31, 1996
                                                                to June 30, 1996
                                                                ----------------

CLASS C***
Net asset value, beginning of period                                 $ 10.39
                                                                     -------
Increase (decrease) from investment operations:
  Net investment income                                              $  0.20
  Net realized and unrealized loss
    on investments                                                     (0.23)
                                                                     -------
    Net decrease from investment operations                          $ (0.03)
Distributions to shareholders:
  From net investment income                                           (0.20)
  In excess of net investment income                                   (0.07)
                                                                     -------
Net decrease in net asset value                                      $ (0.30)
                                                                     -------
Net asset value, end of period                                       $ 10.09
                                                                     =======
Total return*                                                          (0.26%)
Ratio of net expenses
  to average net assets                                                 1.86%**+
Ratio of net investment income
  to average net assets                                                 5.64%**+
Portfolio turnover rate                                                   35%**
Average commission rate paid per
  exchange listed transaction                                        $0.0579
Net assets, end of period (in thousands)                             $   517
Ratios assuming reduction for fees paid indirectly:
  Net expenses                                                          1.80%**
  Net investment income                                                 5.70%**

<FN>
  + Ratios assuming no reduction for fees paid indirectly.
  * 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.
 ** Annualized
*** Class C shares were first publicly offered on January 31, 1996.
</FN>
</TABLE>

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

                                      14
<PAGE>
Pioneer Income Fund
Notes To Financial Statements
June 30, 1996

1. Pioneer Income Fund (the Fund) is a Delaware 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 consistent with preservation and conservation of capital. Growth of
capital is a secondary consideration.

    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 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 distribution 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.
Debt securities are valued based on valuations furnished by an independent
pricing service that utilizes a matrix system. This matrix system reflects such
factors as security prices, yields, maturities and ratings and is supplemented
by dealer and exchange quotations and fair market value information from other
sources, as required. Market discount and premium are accreted or amortized
daily on a straight-line basis. Equity securities are valued at the last sale
price on the principal exchange where they are traded. Equity securities that
have not traded on the date of valuation, or securities for which sale prices
are not generally reported, are valued at the mean between the last bid and
asked prices. Securities for which market quotations are not readily available
are valued at their fair values as determined by, or under the direction of, the
Board of Trustees. Temporary cash investments are valued at amortized cost.
Dividend income is recorded on the ex-dividend date and 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. It is
the Fund's practice to first select for sale those securities that have the
highest cost and also qualify for long-term capital gain or loss treatment for
tax purposes.

    Settlements from litigation and class action suits are recognized when the
Fund acquires an enforceable right to such awards. These settlements are
included in other income to the extent that they are not identifiable with
realized or unrealized losses. Included in net realized gain from investments is
$65,026 of class action settlements received by the Fund during the year ended
December 31, 1995.

    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.

    The characterization of distributions to shareholders for financial
reporting purposes is determined in accordance with income tax rules. Therefore,
the source of the Fund's distributions may be shown in the accompanying
financial statements as either from or in excess of net investment income or net
realized gain on investment transactions, or from paid-in capital, depending on
the type of book/tax differences that may exist.

    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 wholly owned subsidiary of The Pioneer Group, Inc. (PGI). PFD
earned $46,271 in underwriting commissions on the sale of fund shares during the
six months ended June 30, 1996. Distributions to shareholders are recorded as of
the ex-dividend date. Distributions paid by the Fund, if any, with respect to
each class of shares are calculated in the same manner, at the same time, on

                                       15

<PAGE>
Pioneer Income Fund
Notes To Financial Statements
June 30, 1996 (Continued)

the same day 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. 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 up to $250 million; 0.48% of the next $50 million; and 0.45% of
the excess over $300 million.

    In addition, under the management agreement, certain other services and
costs, including accounting, regulatory reporting and insurance premiums, are
paid by the Fund. Included in due to affiliates is $112,317 and $5,429 in
management fees and accounting fees, respectively, payable to PMC at June 30,
1996.

3. 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 $80,542 in transfer agent fees payable to PSC at June 30, 1996.

4. 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 the 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 the 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 $180,927 in distribution fees
payable to PFD at June 30, 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
certain net asset value purchases of Class A shares that are redeemed 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 June 30, 1996, CDSCs in the
amount of $1,191 were paid to PFD.

5. The Fund has entered into certain expense offset arrangements resulting in a
reduction in the Fund's total expenses. For the six months ended June 30, 1996,
the Fund's expenses were reduced by $32,996 under such arrangements.

                                       16
<PAGE>
Pioneer Income Fund
Report of Independent Public Accountants 

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

    We have audited the accompanying balance sheet of Pioneer Income Fund,
including the schedule of investments, as of June 30, 1996, and the related
statement of operations for the period then ended, and statements of changes in
net assets for the periods presented and financial highlights for the periods
ended June 30, 1996, December 31, 1995 and December 31, 1994. 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. The financial
highlights for each of the eight years ended December 31, 1993, were audited by
other auditors whose report dated February 22, 1994 expressed an unqualified
opinion.
 
    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 June
30, 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 Income Fund as of June 30, 1996, the results of its operations for the
period then ended, and the changes in its net assets for the periods presented,
and financial highlights for the periods ended June 30, 1996, December 31, 1995
and December 31, 1994, in conformity with generally accepted accounting
principles. 

                                                             ARTHUR ANDERSEN LLP

Boston, Massachusetts 
August 1, 1996

                                       17

<PAGE>

                              PIONEER INCOME FUND
                                60 State Street
                          Boston, Massachusetts 02109

OFFICERS                              TRUSTEES
JOHN F. COGAN, JR.                    JOHN F. COGAN, JR.
Chairman and President                MARGARET B. W. GRAHAM
DAVID D. TRIPPLE                      JOHN W. KENDRICK                   
Executive Vice President              MARGUERITE A. PIRET
JOHN A. CAREY                         DAVID D. TRIPPLE
Vice President                        STEPHEN K. WEST
SHERMAN B. RUSS                       JOHN WINTHROP
Vice President
WILLIAM H. KEOUGH
Treasurer
JOSEPH P. BARRI 
Secretary

INVESTMENT ADVISER                    PRINCIPAL UNDERWRITER
Pioneering Management                 Pioneer Funds
Corporation                           Distributor, Inc.

CUSTODIAN                             LEGAL COUNSEL
Brown Brothers                        Hale and Dorr
Harriman & Co.

SHAREHOLDER                           INDEPENDENT
SERVICES AND                          PUBLIC
TRANSFER AGENT                        ACCOUNTANTS
Pioneering Services Corporation       Arthur Andersen LLP
60 State  Street
Boston, Massachusetts 
02109

- --------------------------------------------------------------------------------

    Please call Pioneer for information on:
    Existing accounts, new accounts, prospectuses, 
    applications and service forms.................         1-800-225-6292
    Fund yields and prices.........................         1-800-225-4321
    Toll-free fax..................................         1-800-225-4240
    Retirement plans...............................         1-800-622-0176
    Telecommunications Device for the Deaf (TDD)...         1-800-225-1997

- --------------------------------------------------------------------------------

    When distributed to persons who are not shareowners of the Fund, this report
    must be accompanied by a current prospectus, which discusses the objectives,
    policies and other information about the Fund. 0896-3599 Copy Rights Pioneer
    Funds Distributor, Inc.


    0896-3599
    [Copyright] Pioneer Funds Distributor, Inc.



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