PIONEER SHORT TERM INCOME TRUST
485BPOS, 1996-03-29
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    As filed with the Securities and Exchange Commission on March 29, 1996.
    
                                                              File Nos. 33-47613
                                                                        811-6657

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM N-1A
                                      ----
  REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933        /_X__/

                      Pre-Effective Amendment No. __             
                                                                 /----/
                                                                 
   
                      Post-Effective Amendment No. 4             /_X__/
    

                                     and/or

     REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY          ____

                               ACT OF 1940                       /_X_ /
                                      
   
                             Amendment No. 5                     /_X_ /
    

                        (Check appropriate box or boxes)

                         PIONEER SHORT-TERM INCOME TRUST

               (Exact name of registrant as specified in charter)

                  60 State Street, Boston, Massachusetts 02109

                (Address of principal executive office) Zip Code

       Registrant's Telephone Number, including Area Code: (617) 742-7825

                      Joseph P. Barri, Esq., Hale and Dorr,
                        60 State Street, Boston, MA 02109

                     (Name and address of agent for service)

It is proposed that this filing will become effective:

   
   _X_       on March 29, 1996 pursuant to paragraph (b) of Rule 485


The Registrant has  registered an indefinite  number of shares  pursuant to Rule
24f-2 under the Investment Company Act of 1940, as amended. The Registrant filed
the notice  required by Rule 24f-2 for its most  recent  fiscal year on or about
January 29, 1996.
    

                         CALCULATION OF REGISTRATION FEE
<TABLE>
<CAPTION>

   
Title of Securities                         Proposed Maximum  Proposed Maximum 
Being Registered         Amount of Shares   Offering Fee      Aggregate Offering     Amount of 
Shares of Beneficial     Being Registered   Per Unit               Price          Registration Fee
<S>                         <C>                <C>               <C>                  <C>     
Interest                    1,891,304          $3.85             $7,030,114           $100.00*
</TABLE>


*This  calculation  has been made  pursuant to Rule 24e-2  under the  Investment
Company  Act of 1940.  During  its fiscal  year ended  November  30,  1996,  the
Registrant redeemed or repurchased  10,696,240 shares of beneficial interest, of
which 8,880,260  shares were utilized by the Registrant on its Rule 24f-2 Notice
filed on  January  29,  1996 and  1,815,980  shares  are being  used  herein for
purposes of reducing the filing fee payable herewith under Rule 24e-2. No fee is
required for the  registration of such 1,815,980  shares.  An additional  75,324
shares being registered  hereby are valued at the public offering price of $3.85
as of March 19, 1996.


    

<PAGE>


                         PIONEER SHORT-TERM INCOME TRUST

                           CLASS A AND CLASS B SHARES

            Cross-Reference Sheet Showing Location in Prospectus and
                     Statement of Additional Information of
             Information Required by Items of the Registration Form


                                                     Location in Prospectus
                                                         or Statement of
Form N-1A Item Number and Caption                    Additional Information
- ---------------------------------                    ----------------------

1.  Cover Page............................      Prospectus - Cover Page

2.  Synopsis..............................      Prospectus - Expense Information

3.  Condensed Financial Information.......      Prospectus - Financial
                                                Highlights

4.  General Description of Registrant.....      Prospectus - Investment
                                                Objective and Policies; The
                                                Trust

5.  Management of the Fund................      Prospectus - Management of the
                                                Trust

6.  Capital Stock and Other Securities....      Prospectus -Investment Objective
                                                and Policies; The Trust

7.  Purchase of Securities Being Offered..      Prospectus - Trust Share
                                                Alternatives; How to Buy Trust
                                                Shares; Shareholder Services;
                                                Distribution Plans

8.  Redemption or Repurchase..............      Prospectus - Trust Share
                                                Alternatives; How to Sell Trust
                                                Shares; Shareholder Services

9.  Pending Legal Proceedings.............      Not Applicable

10. Cover Page............................      Statement of Additional
                                                Information - Cover Page

11. Table of Contents.....................      Statement of Additional
                                                Information - Cover Page
<PAGE>
                                                     Location in Prospectus
                                                         or Statement of
Form N-1A Item Number and Caption                    Additional Information
- ---------------------------------                    ----------------------

12. General Information and History.......      Statement of Additional
                                                Information - Cover Page;
                                                Description of Shares

13. Investment Objectives and Policies....      Statement of Additional
                                                Information - Investment
                                                Policies and Restrictions

14. Management of the Fund................      Statement of Additional
                                                Information - Management of the
                                                Trust; Investment Adviser

15. Control Persons and Principal Holders       
      of Securities.......................      Statement of Additional
                                                Information - Management of the
                                                Trust

16. Investment Advisory and Other            
      Services............................      Statement of Additional
                                                Information - Management of the
                                                Trust; Investment Adviser;
                                                Shareholder Servicing/Transfer
                                                Agent; Underwriting Agreement
                                                and Distribution Plans;
                                                Custodians; Independent
                                                Accountants

17. Brokerage Allocation and Other
       Practices...........................     Statement of Additional
                                                Information - Portfolio
                                                Transactions

18. Capital Stock and Other Securities....      Statement of Additional
                                                Information - Description of
                                                Shares; Certain Liabilities


19. Purchase Redemption and Pricing of
       Securities Being Offered............     Statement of Additional
                                                Information - Determination of
                                                Net Asset Value; Letter of
                                                Intention; Systematic Withdrawal
                                                Plan

20. Tax Status............................      Statement of Additional
                                                Information - Tax Status
<PAGE>
                                                     Location in Prospectus
                                                         or Statement of
Form N-1A Item Number and Caption                    Additional Information
- ---------------------------------                    ----------------------

21.  Underwriters..........................     Statement of Additional
                                                Information - Principal
                                                Underwriter; Underwriting
                                                Agreement and Distribution Plans

22.  Calculation of Performance Data.......     Statement of Additional
                                                Information - Investment Results

23. Financial Statements..................      Balance Sheet; Report of
                                                Independent Public Accountants

[PIONEER LOGO]

Pioneer
Short-Term Income
Trust

   
Class A and Class B Shares
Prospectus
March 29, 1996
    

The investment objective of the Pioneer Short-Term Income Trust (the "Trust")
is a high level of current income consistent with a relatively high level of
principal stability. The Trust is a diversified open-end investment company.

The Trust invests primarily in high grade, short-term debt securities. Under
normal circumstances, the Trust invests at least 85% of its total assets in
securities issued or guaranteed by the United States ("U.S.") government or
its agencies or instrumentalities and other debt securities of U.S. and
foreign issuers rated within the three highest grades by the major recognized
rating services or, if not rated, judged to be of comparable quality by the
Trust's investment adviser. The Trust may invest the remainder of its
portfolio in debt securities rated in the fourth highest grade by the major
rating services or, if not rated, judged to be of comparable quality. The
Trust invests only in securities with remaining maturities of five years or
less. Under normal circumstances, the Trust will maintain a dollar weighted
average maturity of not more than three years.

The Trust is designed for investors seeking:

(bullet) a higher level of current income than normally provided by money
         market investments; and

(bullet) less price volatility than investments in intermediate and long-term
         fixed income securities.

Unlike certain money market instruments, an investment in the Trust is
neither insured nor guaranteed and its net asset value will fluctuate. The
Trust's yield will normally be more sensitive to interest rate fluctuations
than that of a fund investing primarily in securities with intermediate or
long-term remaining maturities.

The value of your account upon redemption may be more or less than your
purchase price. Shares in the Trust are not deposits or obligations of, or
guaranteed or endorsed by, any bank or other depository institution, and the
shares are not federally insured by the Federal Deposit Insurance
Corporation, the Federal Reserve Board or any other government agency.

   
This Prospectus provides the information about the Trust that you should know
before investing. Please read and retain it for your future reference. More
information about the Trust is included in the Statement of Additional
Information also dated March 29, 1996, which is incorporated into this
Prospectus by reference. A copy of the Statement of Additional Information
may be obtained free of charge by calling Shareholder Services at
1-800-225-6292 or by written request to the Trust at 60 State Street, Boston,
Massachusetts 02109. Additional information about the Trust has also been
filed with the Securities and Exchange Commission (the "SEC") and is
available upon request and without charge.
    

   
            TABLE OF CONTENTS                                      PAGE
- -----------------------------------------------------------------------
I.          EXPENSE INFORMATION                                     2
II.         FINANCIAL HIGHLIGHTS                                    3
III.        INVESTMENT OBJECTIVE AND POLICIES                       5
IV.         MANAGEMENT OF THE TRUST                                 7
V.          TRUST SHARE ALTERNATIVES                                8
VI.         SHARE PRICE                                             8
VII.        HOW TO BUY TRUST SHARES                                 9
             Class A Shares                                         9
             Class B Shares                                        10
VIII.       HOW TO SELL TRUST SHARES                               11
IX.         HOW TO EXCHANGE TRUST SHARES                           13
X.          DISTRIBUTION PLANS                                     13
XI.         DIVIDENDS, DISTRIBUTIONS AND TAXATION                  14
XII.        SHAREHOLDER SERVICES                                   15
             Account and Confirmation Statements                   15
             Additional Investments                                15
             Automatic Investment Plans                            15
             Financial Reports and Tax Information                 15
             Distribution Options                                  15
             Directed Dividends                                    15
             Direct Deposit                                        15
             Voluntary Tax Withholding                             16
             Telephone Transactions and Related Liabilities        16
             FactFone(SM)                                          16
             Retirement Plans                                      16
             Telecommunications Device for the Deaf (TDD)          16
             Systematic Withdrawal Plans                           16
             Reinstatement Privilege (Class A Shares Only)         16
XIII.       THE TRUST                                              17
XIV.        INVESTMENT RESULTS                                     17
    


THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE COMMISSION
OR ANY STATE SECURITIES COMMISSION PASSED UPON THE ACCURACY OR ADEQUACY OF
THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.


<PAGE>

I. EXPENSE INFORMATION

   
  This table is designed to help you understand the charges and expenses that
you, as a shareholder, will bear directly or indirectly when you invest in
the Trust. The table reflects estimated annual operating expenses based on
actual expenses for the fiscal year ended November 30, 1995.

                                                      Class A     Class B
                                                      -------     -------
Shareholder Transaction Expenses:
 Maximum Initial Sales Charge on Purchases
  (as a percentage of offering price)                  2.50%       none
 Maximum Sales Charge on Reinvestment
  of Dividends                                         none        none
 Maximum Deferred Sales Charge
  (as a percentage of original purchase price or
  redemption proceeds, as applicable)                  none(1)     2.00%
 Redemption Fee(2)                                     none        none
 Exchange Fee                                          none        none
Annual Operating Expenses
 (as a percentage of average net assets):
  Management Fee (after fee reduction)(3)              0.00%       0.00%
  12b-1 Fees                                           0.25%       1.00%
  Other Expenses (including transfer agent fee,
   custodian fees and accounting and printing
   expenses) (after expense reduction)(3)              0.60%       0.60%
                                                       -----       -----
  Total Operating Expenses (after fee and expense
   reductions)(3)                                      0.85%       1.60%
                                                       =====       =====
    

(1) Purchases of $1,000,000 or more and purchases by participants in certain
group plans are not subject to an initial sales charge but may be subject to
a contingent deferred sales charge as further described under "How to Sell
Trust Shares."

   
(2) Separate fees (currently $10 and $20, respectively) apply to domestic and
international wire transfers of redemption proceeds.
    

   
(3)  Pioneering Management Corporation ("PMC") has agreed not to impose a
portion of its management fee and to make other arrangements, if necessary,
to limit other operating expenses of the Fund to the extent required to
reduce Class A expenses to 0.85% of the average daily net assets attributable
to Class A shares; the portion of fund-wide expenses attributable to Class B
shares will be reduced only to the extent such expenses are reduced for Class
A shares. This agreement is voluntary and temporary and may be revised or
terminated at any time.

Expenses Absent Fee and Expense Reductions            Class A       Class B
                                                      -------       -------
Management Fee                                         0.50%         0.50%
Other Expenses                                         0.63%         0.67%
Total Operating Expenses                               1.38%         2.17%
    

   
 Example:

  You would pay the following dollar amounts on a $1,000 investment, assuming
a 5% annual return and redemption at the end of each of the time periods:

                                       1 Year    3 Years    5 Years   10 Years
                                       ------    -------    -------   --------
Class A Shares                          $33        $51        $71       $127
Class B Shares
  --Assuming complete redemption
     at end of period                   $36        $60        $87       $190*
  --Assuming no redemption              $16        $50        $87       $190*
    

* Class B shares convert to Class A shares five years after purchase;
therefore, Class A expenses are used after year five.

   
   The example is designed for information purposes only, and should not be
considered a representation of past or future expenses or return. Actual Fund
expenses and return vary from year to year and may be higher or lower than
those shown.
    

   For further information regarding management fees, 12b-1 fees and other
expenses of the Trust, including information regarding the basis upon which
fees and expenses are reduced or reallocated, see "Management of the Trust,"
"Distribution Plans" and "How To Buy Trust Shares" in this Prospectus and
"Management of the Trust" and "Underwriting Agreement and Distribution Plans"
in the Statement of Additional Information. The Trust's imposition of a 12b-1
fee may result in long-term shareholders indirectly paying more than the
economic equivalent of the maximum sales charge permitted under the Rules of
Fair Practice of the National Association of Securities Dealers, Inc.
("NASD").

   The maximum initial sales charge is reduced on purchases of specified
amounts of Class A shares and the value of shares owned in other Pioneer
mutual funds is taken into account in determining the applicable initial
sales charge. See "How to Buy Trust Shares." No sales charge is applied to
exchanges of shares of the Trust for shares of other publicly available
Pioneer mutual funds. See "How to Exchange Trust Shares."

                                      2
<PAGE>

   
II. FINANCIAL HIGHLIGHTS
    

   
  The following information has been derived from the financial statements of
the Trust which have been audited by Arthur Andersen LLP, independent public
accountants. Arthur Andersen LLP's report on the Trust's financial statements
for the fiscal year ending November 30, 1995 appears in the Trust's Annual
Report, which is incorporated by reference in the Statement of Additional
Information. The information listed below should be read in conjunction with
those financial statements. The Annual Report includes more information about
the Trust's performance and is available free of charge by calling
Shareholder Services at 1-800-225-6292.
    

   
PIONEER SHORT-TERM INCOME TRUST
Financial Highlights for Each Class A Share Outstanding Throughout Each Period:


<TABLE>
<CAPTION>
                                                                                                August 10
                                                           For the Year Ended November 30,         to
                                                           -------------------------------     November 30,
                                                             1995       1994+        1993          1992
                                                           --------    --------   --------    ------------
<S>                                                        <C>         <C>        <C>           <C>
Net asset value, beginning of period                       $  3.75     $  3.95    $  3.95       $  4.00
                                                           -------     -------    ------        -------
Increase (decrease) from investment operations:
   Net investment income                                   $  0.25     $  0.22    $  0.24       $  0.08
   Net realized and unrealized gain (loss) on
     investments                                              0.10       (0.21)      0.00         (0.05)
                                                           -------     -------    ------        -------
  Total increase (decrease) from investment operations     $  0.35     $  0.01    $  0.24       $  0.03
                                                           -------     -------    ------        -------
Distributions to shareholders from:
 Net investment income                                     $ (0.26)    $ (0.21)   $ (0.24)      $ (0.08)
                                                           -------     -------    ------        -------
Net increase (decrease) in net asset value                 $  0.09     $ (0.20)   $  0.00       $ (0.05)
                                                           -------     -------    ------        -------
Net asset value, end of period                             $  3.84     $  3.75    $  3.95       $  3.95
                                                           =======     =======    ======        =======
Total return*                                                 9.64%       0.32%      6.28%         0.79%
Ratio of net operating expenses to average net assets         0.86%+++    0.85%      0.66%         0.50%**
Ratio of net investment income to average net assets          6.43%+++    5.89%      5.80%         5.93%**
Portfolio turnover rate                                     109.60%     144.17%     83.25%       146.45%**
Net assets, end of period (in thousands)                   $53,860     $59,088    $57,482       $15,588
Ratios assuming no reduction of fees or expenses by PMC:
   Net operating expenses                                     1.38%       1.20%      1.33%         3.40%**
   Net investment income                                      5.29%       5.54%      5.13%         3.03%**
Ratios assuming a reduction of fees and expenses by PMC
  and a reduction for fees paid indirectly:
   Net operating expenses                                     0.85%
   Net investment loss                                        6.44%
</TABLE>
    

   
  +Based upon average shares outstanding and average net assets for the
   period presented.
+++Ratios include 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 B shares were first offered on April 4, 1994.
    

                                      3
<PAGE>

   
II. FINANCIAL HIGHLIGHTS (Continued)
    

   
PIONEER SHORT-TERM INCOME TRUST
Financial Highlights for Each Class B Share Outstanding Throughout Each
Period:***


<TABLE>
<CAPTION>
                                                                                        April 4
                                                              Year ended                  to
                                                           November 30, 1995      November 30, 1994+
                                                          -------------------   ---------------------
<S>                                                            <C>                      <C>
Net asset value, beginning of period                           $  3.75                  $  3.89
                                                               -------                  -------
Increase (decrease) from investment operations:
   Net investment income                                       $  0.22                  $  0.15
   Net realized and unrealized gain (loss) on
     investments                                                  0.11                    (0.16)
                                                               -------                  -------
  Total increase (decrease) from investment operations         $  0.33                  $ (0.01)
                                                               -------                  -------
Distributions to shareholders from:
   Net investment income                                       $ (0.23)                 $ (0.13)
                                                               -------                  -------
Net increase (decrease) in net asset value                     $ (0.10)                 $ (0.14)
                                                               -------                  -------
Net asset value, end of period                                 $  3.85                  $  3.75
                                                               =======                  =======
Total return*                                                     8.96%                   (0.24%)
Ratio of net operating expenses to average net assets             1.63%+++                 1.41%**
Ratio of net investment income to average net assets              5.61%+++                 6.05%**
Portfolio turnover rate                                         109.60%                  144.17%
Net assets, end of period (in thousands)                        $2,924                   $3,182
Ratios assuming no reduction of fees or expenses by PMC:
   Net operating expenses                                         2.17%                    1.82%**
   Net investment income                                          5.08%                    5.64%**
Ratios assuming a reduction of fees and expenses
  by PMC and a reduction for fees paid indirectly:
   Net operating expenses                                         1.60%
   Net investment loss                                            5.64%
</TABLE>
    

   
  +Based upon average shares outstanding and average net assets for the
   period presented.
+++Ratios include 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 B shares were first offered on April 4, 1994.
    


                                      4
<PAGE>

III. INVESTMENT OBJECTIVE AND POLICIES

  The Trust's investment objective is a high level of current income
consistent with a relatively high level of principal stability. The Trust
invests in:

  (bullet) Debt securities issued or guaranteed by the U.S. government or its
           agencies or instrumentalities;

  (bullet) Other debt securities including corporate debt securities such as
           bonds, notes and debentures; mortgage-backed securities including
           collateralized mortgage obligations; other asset-backed securities;
           debt securities of foreign issuers including foreign corporations,
           banks, governments and supranational organizations; and commercial
           paper, including variable and floating rate paper; and

  (bullet) Short-term money market instruments including time deposits and
           certificates of deposit maturing in one year or less, repurchase
           agreements maturing in one week or less, and banker's acceptances.

Although the Trust may invest without limit in short-term obligations of
foreign issuers when PMC as the Trust's investment adviser deems it
advantageous to do so, under normal circumstances not more than 25% of the
Trust's total assets will be invested in securities of foreign issuers (see
"Foreign Investments" below). The Fund may also purchase securities on a
"when-issued" or forward commitment basis and may lend portfolio securities
having a value up to 5% of its total assets.

Quality

  Under normal circumstances, the Trust invests at least 85% of its total
assets in securities that are issued or guaranteed by the U.S. government or
its agencies or instrumentalities or that are rated in the highest three
grades by the major recognized rating services or, if unrated, are judged to
be of comparable quality by PMC. The remainder of the Trust's investments
must be rated within the four highest grades of the major rating services
(i.e., at least "Baa" by Moody's Investors Service or "BBB" by Standard &
Poor's Ratings Group, or their equivalents) or, if not rated, judged to be of
comparable quality. Securities rated BBB or Baa are considered investment
grade securities having adequate capacity to pay interest and repay
principal. Such securities may have speculative characteristics, however, and
changes in economic and other conditions are more likely to lead to a
weakened capacity of the issuer of such securities to make principal and
interest payments than is the case with higher rated securities. In the event
that the credit quality of a security falls below investment grade subsequent
to purchase, the Trust will sell such security as soon as PMC determines it
is prudent to do so. No more than 5% of the Trust's assets may be invested in
securities that are rated below investment grade. For a description of
ratings, see the Statement of Additional Information.

Maturity

  The dollar-weighted average maturity of the Trust's portfolio will not
exceed three years. Generally, the Trust invests only in securities with
remaining maturities of five years or less. For purposes of these policies,
an instrument will be treated as having a maturity earlier than its stated
maturity date if the instrument has technical features (such as puts, demand,
prepayment or redemption features) or a variable rate of interest which,
based on projected cash flows from the instrument, will in the judgment of
PMC result in the instrument being valued in the market as though it has the
earlier maturity. If a security's estimated remaining maturity changes from
under five years to over five years, PMC will decide either to sell or retain
the security based on its determination of the best interests of the Trust.

U.S. Government Securities and Mortgage and Other Asset Backed Securities

  Subject to its policies concerning remaining maturities and average
portfolio maturity, the Trust may invest in a variety of U.S. government
securities, including (1) U.S. Treasury obligations, which differ only in
their interest rates, stated maturities and times of issuance: U.S. Treasury
bills (stated maturities of one year or less), U.S. Treasury notes (stated
maturities of one to ten years) and U.S. Treasury bonds (generally stated
maturities of greater than ten years) and (2) obligations of varying stated
maturities issued or guaranteed by certain agencies and instrumentalities of
the U.S. government, such as mortgage participation certificates guaranteed
by the Government National Mortgage Association ("GNMA"), the Federal
National Mortgage Association ("FNMA") and the Federal Home Loan Mortgage
Corporation ("FHLMC") and Federal Housing Administration debentures.

  Certain U.S. government securities, including U.S. Treasury bills, notes and
bonds, and GNMA certificates, are supported by the full faith and credit of
the United States. Certain other U.S. government securities issued or
guaranteed by Federal agencies or government sponsored enterprises, such as
securities of the Federal Home Loan Banks, are not supported by the full
faith and credit of the U.S., but may be supported by the right of the issuer
to borrow from the U.S. Treasury. Other obligations, such as those of FHLMC
and FNMA, are supported by the discretionary authority of the U.S. government
to purchase the agency's securities although it has no legal obligation to do
so. Still other obligations are supported only by the credit of the
instrumentality itself.

  GNMA, FHLMC and FNMA, as well as private entities, issue mortgage-backed
securities which provide monthly payments which are, in effect, a
"pass-through" of the monthly interest and principal payments (including any
prepayments) made by the individual borrowers on the pooled mortgage loans.
Private issuers of such securities include banks, broker-dealers, mortgage
corporations and other financial institutions.

  The Trust may invest in collateralized mortgage obligations ("CMOs"), which
are obligations fully collateralized by a portfolio of mortgages or
mortgage-related securities. Payments of principal and interest on the
mortgages are passed through to the holders of the CMOs on the same schedule
as they are received, although certain classes of CMOs have priority over
others with respect to the receipt of prepayments on the mortgages.
Therefore, depending on the type of CMOs in which the Trust invests, the
investment may be subject to a greater or lesser risk of prepayment than
other types of mortgage-related securities. A real estate mortgage investment
conduit ("REMIC") is a form of CMO that qualifies for special tax treat-

                                      5
<PAGE>

ment under the Internal Revenue Code of 1986, as amended (the "Code"). The
Trust may acquire "regular" interests in REMICs but does not intend, under
current tax law, to acquire residual interests in REMICs. Mortgage-backed
securities may be less effective than traditional debt obligations of similar
maturity at maintaining yields during periods of declining interest rates.

  Other asset-backed securities in which the Trust may invest represent
interests in pools of consumer loans unrelated to mortgage loans and most
often are structured as pass-through securities. Interest and principal
payments ultimately depend on payment of the underlying loans by individuals,
although the securities may be supported by letters of credit or other credit
enhancements. The value of such asset-backed securities may also depend on
the creditworthiness of the servicing agent for the loan pool, the originator
of the loans or the financial institution providing the credit enhancement.

Foreign Investments

   
  Under normal circumstances the Trust does not invest more than 25% of its
total assets in the securities of foreign issuers (which term excludes for
these purposes Canadian issuers). When PMC believes, however, that it is in
the best interest of the Trust, the Trust may invest without any limitation
in short-term foreign debt securities. These foreign investments may be
issued by foreign governments, banks or corporations, as well as foreign
branches of U.S. banks and certain supranational organizations such as the
World Bank and the European Union. The Trust's foreign investments may be
denominated in U.S. dollars or selected foreign currencies. The Trust does
not currently hold any non-U.S. dollar denominated security and does not
intend to purchase such securities in the coming year. Foreign investments
are subject to the Trust's quality and maturity policies described above.
    

  Investing in securities of foreign companies and countries involves certain
considerations and risks which are not typically associated with investing in
U.S. government securities and securities of domestic companies. Foreign
companies are not subject to uniform accounting, auditing and financial
standards and requirements comparable to those applicable to U.S. companies.
There may also be less government supervision and regulation of foreign
securities exchanges, brokers and listed companies than exists in the United
States. Interest paid by foreign issuers may be subject to withholding and
other foreign taxes which will decrease the net return on such investments as
compared to interest paid to the Trust by the U.S. government or by domestic
companies. In addition, there may be the possibility of expropriation,
confiscatory taxation, political, economic or social instability, or
diplomatic developments which could affect assets of the Trust held in
foreign countries.

  In addition, the value of foreign securities may also be adversely affected
by fluctuations in the relative rates of exchange between the currencies of
different nations and by exchange control regulations. There may be less
publicly available information about foreign companies compared to reports
and ratings published about U.S. companies. Foreign securities markets have
substantially less trading volume than domestic markets and securities of
some foreign companies are less liquid and more volatile than securities of
comparable U.S. companies. Transaction costs on foreign securities exchanges
are generally higher than in the U.S.

  The Trust's investments in securities denominated in foreign currencies are
also subject to currency risk, as the U.S. dollar value of these securities
may be favorably or unfavorably affected by changes in foreign currency
exchange rates and exchange control regulations. Currency exchange rates may
fluctuate significantly over short periods of time causing, among other
factors, the Trust's net asset value to fluctuate as well. Currency exchange
rates are generally determined by forces of supply and demand and the
perceived relative merits of investments in various countries, but can be
affected unpredictably by intervention from U.S. and foreign governments or
central banks, political events and currency control measures.

  The Trust has the ability to hold a portion of its assets in foreign
currencies and to enter into forward foreign currency contracts to facilitate
settlement of foreign securities transactions or to protect against changes
in foreign currency exchange rates. A forward foreign currency contract
involves an obligation to purchase or sell a specific currency on a future
date, at a price set at the time of the contract. The Trust might sell a
foreign currency on either a spot or forward basis to hedge against an
anticipated decline in the dollar value of securities in its portfolio or
securities it intends or has contracted to sell or to preserve the U.S.
dollar value of dividends, interest or other amounts it expects to receive.
Although this strategy could minimize the risk of loss due to a decline in
the value of the hedged foreign currency, it could also limit any potential
gain which might result from an increase in the value of the currency.
Alternatively, the Trust might purchase a foreign currency or enter into a
forward purchase contract for the currency to preserve the U.S. dollar price
of securities it is authorized to purchase or has contracted to purchase.

  The Trust may also engage in cross-hedging by using forward contracts in one
currency to hedge against fluctuations in the value of securities denominated
in a different currency, if PMC determines that there is a pattern of
correlation between the two currencies. Cross-hedging may also include
entering into a forward transaction involving two foreign currencies, using
one foreign currency as a proxy for the U.S. dollar to hedge against
variations in the other foreign currency if PMC determines that there is a
pattern of correlation between the proxy currency and the U.S. dollar. To the
extent that the expected correlation between two particular currencies is
imperfect, a forward transaction will not be an effective hedge and the Trust
may be exposed to a loss, which loss may exceed the loss that would have
occurred if a cross-hedge were not attempted.

  If the Trust enters into a forward contract to buy foreign currency for any
purpose, the Trust will be required to place cash or high grade liquid debt
securities in a segregated account of the Trust in an amount equal to the
value of the Trust's total assets committed to the consummation of the
forward contract. The Trust may enter into forward currency

                                      6
<PAGE>

contracts having an intrinsic value of up to 25% of its net assets. Forward
contracts are subject to the risk that the counterparty to such contract will
default on its obligations. Since a forward contract is not guaranteed by an
exchange or clearinghouse, a default would deprive the Trust of unrealized
profits or the benefits of a currency hedge and may force the Trust to cover
its purchase or sale commitments, if any, at the current market price.

Portfolio Trading

  The Trust's portfolio is fully managed by purchasing and selling securities,
as well as holding selected securities to maturity. While the Trust does not
normally engage in trading for short-term profits, the Trust engages in
portfolio trading of securities regardless of the length of time the Trust
has held the securities if it believes a transaction net of costs (including
custodian's fees) will contribute to the achievement of its investment
objective.

  Any such changes in the portfolio may result in increases or decreases in
the Trust's current income available for distribution to shareholders and in
its holding of debt securities which sell at moderate to substantial premiums
or discounts from face value. If the Trust's expectations of changes in
interest rates or its evaluation of the normal yield relationships between
two securities prove to be incorrect, the Trust's income, net asset value and
potential gain may be reduced or its potential loss may be increased. An
increase in interest rates will generally reduce the value of portfolio
investments (and, therefore, the net asset value of the shares of the Trust),
and a decline in interest rates will generally increase their value.

   
  A high portfolio turnover rate (i.e., 100% or higher) will result in
correspondingly higher transaction costs to the Trust and may, under some
circumstances, make it more difficult for the Trust to qualify as a regulated
investment company under the Code. See "Financial Highlights" for actual
turnover rates.
    

Repurchase Agreements

  The Trust may enter into repurchase agreements, generally not exceeding
seven days. Such repurchase agreements will be fully collateralized with U.S.
Treasury and/or U.S. government agency obligations with a market value of not
less than 100% of the obligation, valued daily. Collateral will be held by
the Trust's custodian in a segregated, safekeeping account for the benefit of
the Trust. In the event that a repurchase agreement is not fulfilled, the
Trust could suffer a loss to the extent that the value of the collateral
falls below the repurchase price or if the Trust is prevented from realizing
the value of the collateral by reason of an order of a court with
jurisdiction over an insolvency proceeding with respect to the other party to
the repurchase agreement.

   The Trust's investment objective is fundamental and cannot be changed
without shareholder approval. Other investment policies and restrictions are
described in the Statement of Additional Information. Since all investments
are subject to risks and fluctuations in value due to economic conditions and
other factors, there can be no assurance that the Trust will achieve its
investment objective.

IV. MANAGEMENT OF THE TRUST

  The Trust's Board of Trustees has overall responsibility for management and
supervision of the Trust. There are currently eight Trustees, six of whom are
not "interested persons" of the Trust as defined in the Investment Company
Act of 1940, as amended (the "1940 Act"). The Board meets at least quarterly.
By virtue of the functions performed by PMC as investment adviser, the Trust
requires no employees other than its executive officers, all of whom receive
their compensation from PMC or other sources. The Statement of Additional
Information contains the names and general business and professional
background of each Trustee and executive officer of the Trust.

   
  Each fixed income portfolio managed by PMC, including the Trust, is overseen
by a Fixed Income Committee, which consists of PMC's most senior fixed income
professionals, and a Portfolio Management Committee, which consists of PMC's
fixed income portfolio managers. Both committees are chaired by Mr. David
Tripple, PMC's President and Chief Investment Officer and Executive Vice
President of each of the Pioneer mutual funds. Mr. Tripple joined PMC in 1974
and has had general responsibility for PMC's investment operations and
specific portfolio assignments for over five years. Fixed income investments
at PMC, including those made on behalf of the Trust, are under the general
supervision of Mr. Sherman Russ, a Senior Vice President of PMC. Mr. Russ
joined PMC in 1983. Since August 1992, day-to-day management of the Trust has
been the responsibility of Richard A. Schlanger who joined PMC in 1988 and is
Vice President of PMC and the Trust. In certain instances where Mr. Schlanger
is unavailable, primary responsibility for the day-to-day management of the
Trust may be assumed temporarily by Mr. Russ.
    

   
  The Trust is managed under a contract with PMC. PMC serves as investment
adviser to the Trust and is responsible for the overall management of the
Trust's business affairs, subject only to the authority of the Board of
Trustees. PMC is a wholly-owned subsidiary of The Pioneer Group, Inc.
("PGI"), a publicly-traded Delaware corporation. Pioneer Funds Distributor,
Inc. ("PFD"), an indirect wholly-owned subsidiary of PGI, is the principal
underwriter of shares of the Trust.
    

  In addition to the Trust, PMC also manages and serves as the investment
adviser for other mutual funds and is an investment adviser to certain other
institutional accounts. PMC's and PFD's executive offices are located at 60
State Street, Boston, Massachusetts 02109.

  Under the terms of its contract with the Trust, PMC assists in the
management of the Trust and is authorized in its discretion to buy and sell
securities for the account of the Trust. PMC pays all the expenses, including
executive salaries and the rental of office space, relating to its services
for the Trust, with the exception of the following which are to be paid by
the Trust: (a) taxes and other governmental charges, if any; (b) interest on
borrowed money, if any; (c) legal fees and expenses; (d) auditing fees; (e)
insurance premiums; (f) dues and fees for membership in trade associations;
(g) fees and expenses of registering and maintaining registrations by the

                                      7
<PAGE>

   
Trust of its shares with the SEC, individual states, territories and foreign
jurisdictions and of preparing reports to regulatory agencies; (h) fees and
expenses of Trustees not affiliated with or interested persons of PMC; (i)
fees and expenses of the custodian, dividend disbursing agent, transfer agent
and registrar; (j) issue and transfer taxes chargeable to the Trust in
connection with securities transactions to which the Trust is a party; (k)
costs of reports to shareholders, shareholders' meetings and Trustees'
meetings; (l) the cost of certificates representing shares of the Trust; (m)
bookkeeping and appraisal charges; and (n) certain distribution fees pursuant
to its plan of distribution. The Trust also pays all brokerage commissions in
connection with its portfolio transactions.
    

  Orders for the Trust's portfolio securities transactions are placed by PMC,
which strives to obtain the best price and execution for each transaction. In
circumstances in which two or more broker-dealers are in a position to offer
comparable prices and execution, consideration may be given to whether the
broker-dealer provides investment research or brokerage services or sells
shares of any Pioneer mutual fund. See the Statement of Additional
Information for a further description of PMC's brokerage allocation
practices.

  As compensation for its management services and certain expenses which PMC
incurs, PMC is entitled to a management fee equal to 0.50% per annum of the
Trust's average daily net assets up to $100 million, 0.45% of the next $200
million, and 0.40% on assets over $300 million. The fee is normally computed
daily and paid monthly.

   
  During the fiscal year ended November 30, 1995, the Trust incurred expenses
of $825,975, including management fees paid or payable to PMC of $291,294.
PMC has agreed not to impose a portion of its management fee and to make
other arrangements, if necessary, to limit other operating expenses of the
Fund to the extent required to reduce Class A expenses to 0.85% of the
average daily net assets attributable to Class A shares; the portion of
fund-wide expenses attributable to Class B shares will be reduced only to the
extent such expenses are reduced for Class A shares. This agreement is
voluntary and temporary and may be revised or terminated at any time. During
the fiscal year ended November 30, 1995, as a result of this agreement, PMC
did not impose its management fee.
    

  John F. Cogan, Jr., Chairman and President of the Trust, Chairman of PFD,
President and a Director of PGI and Chairman and a Director of PMC, owned
approximately 15% of the outstanding capital stock of PGI as of the date of
this Prospectus.

V. TRUST SHARE ALTERNATIVES

  The Trust continuously offers two Classes of shares designated as Class A
and Class B shares, as described more fully in "How to Buy Trust Shares." If
you do not specify in your instructions to the Trust which Class of shares
you wish to purchase, exchange or redeem, the Trust will assume that your
instructions apply to Class A shares.

  Class A Shares. If you invest less than $1 million in Class A shares, you
will pay an initial sales charge. Certain purchases may qualify for reduced
initial sales charges. If you invest $1 million or more in Class A shares, no
sales charge will be imposed at the time of purchase, however, shares
redeemed within 12 months of purchase may be subject to a contingent deferred
sales charge ("CDSC"). Class A shares are subject to distribution and service
fees at a combined annual rate of up to 0.25% of the Trust's average daily
net assets attributable to Class A shares.

  Class B Shares. If you plan to invest up to $250,000, Class B shares are
available to you. Class B shares are sold without an initial sales charge,
but are subject to a CDSC of up to 2% if redeemed within three years. Class B
shares are subject to distribution and service fees at a combined annual rate
of 1.00% of the Trust's average daily net assets attributable to Class B
shares. Your entire investment in Class B shares is available to work for you
from the time you make your investment, but the higher distribution fee paid
by Class B shares will cause your Class B shares (until conversion) to have a
higher expense ratio and to pay lower dividends, to the extent dividends are
paid, than Class A shares. Class B shares will automatically convert to Class
A shares, based on relative net asset value, approximately five years after
the initial purchase.

  Purchasing Class A or Class B Shares. The decision as to which Class to
purchase depends on the amount you invest, the intended length of the
investment and your personal situation. If you are making an investment that
qualifies for reduced sales charges, you might consider Class A shares. If
you prefer not to pay an initial sales charge on an investment of $250,000 or
less and you plan to hold the investment for at least three years, you might
consider Class B shares.

   
  Investment dealers or their representatives may receive different
compensation depending on which Class of shares they sell. Shares may be
exchanged only for shares of the same Class of another Pioneer mutual fund
and shares acquired in the exchange will continue to be subject to any CDSC
applicable to the shares of the Trust originally purchased. Shares sold
outside the U.S. to persons who are not U.S. citizens may be subject to
different sales charges, CDSCs and dealer compensation arrangements in
accordance with local laws and business practices.
    

VI. SHARE PRICE

   
  Shares of the Trust are sold at the public offering price, which is the net
asset value per share, plus any applicable sales charge. Net asset value per
share of a Class of the Trust is determined by dividing the value of its
assets, less liabilities attributable to that Class, by the number of shares
of that Class outstanding. The net asset value is computed once daily, on
each day the New York Stock Exchange (the "Exchange") is open, as of the
close of regular trading on the Exchange.
    

  Securities are valued at the last sale price on the principal exchange or
market where they are traded. Securities which have not traded on the date of
valuation, or securities for which sales prices are not generally reported,
are valued at the mean between the current bid and asked prices. Securities
quoted in

                                      8
<PAGE>

foreign currencies are converted to U.S. dollars utilizing foreign exchange
rates employed by the Trust's independent pricing services. Generally,
trading in foreign securities is substantially completed each day at various
times prior to the close of regular trading on the Exchange. The values of
such securities used in computing the net asset value of the Trust's shares
are determined as of such times. Foreign currency exchange rates are also
generally determined prior to the close of regular trading on the Exchange.
Occasionally, events which affect the values of such securities and such
exchange rates may occur between the times at which they are determined and
the close of regular trading on the Exchange and will therefore not be
reflected in the computation of the Trust's net asset value. If events
materially affecting the value of such securities occur during such period,
then these securities are valued at their fair value as determined in good
faith by the Trustees. All assets of the Trust for which there is no other
readily available valuation method are valued at their fair value as
determined in good faith by the Trustees.

   
VII. HOW TO BUY TRUST SHARES

  You may buy Trust shares from any securities broker-dealer which has a sales
agreement with PFD. If you do not have a securities broker-dealer, please
call 1-800-225-6292. Shares will be purchased at the public offering price,
that is, the net asset value per share plus any applicable sales charge, next
computed after receipt of a purchase order, except as set forth below.
    

  The minimum initial investment is $5,000 for Class A and Class B shares
except as specified below. The minimum initial investment is $100 for Class A
accounts being established to utilize monthly bank drafts, government
allotments, payroll deduction and other similar automatic investment plans.
Separate minimum investment requirements apply to retirement plans and to
telephone and wire orders placed by broker-dealers; no sales charges or
minimum requirements apply to the reinvestment of dividends or capital gains
distributions. The minimum subsequent investment is $100 for Class A shares
and $500 for Class B shares except that the subsequent minimum investment
amount for Class B share accounts may be as little as $50 if an automatic
investment plan is established (see "Automatic Investment Plans").

   
  Telephone Purchases. Your account is automatically authorized to have the
telephone purchase privilege unless you indicated otherwise on your Account
Application or by writing to Pioneering Services Corporation ("PSC"). The
telephone purchase option may be used to purchase additional shares for an
existing Pioneer mutual fund account; it may not be used to establish a new
account. Proper account identification will be required for each telephone
purchase. A maximum of $25,000 per account may be purchased by telephone each
day. The telephone purchase privilege is available to Individual Retirement
Accounts ("IRAs") but may not be available to other types of retirement plan
accounts. Call PSC for more information.
    

   
  You are strongly urged to consult with your financial representative prior
to requesting a telephone purchase. To purchase shares by telephone, you must
establish your bank account of record by completing the appropriate section
of your Account Application or an Account Options Form. PSC will
electronically debit the amount of each purchase from this pre-designated
bank account. Telephone purchases may not be made for 30 days after the
establishment of your bank of record or any change to your bank information.
    

   
  Telephone purchases will be priced at the net asset value plus any
applicable sales charge next determined after PSC's receipt of a telephone
purchase instruction and receipt of good funds (usually three days after the
purchase instruction). You may always elect to deliver purchases to PSC by
mail. See "Telephone Transactions and Related Liabilities" for additional
information.
    

Class A Shares

  You may buy Class A shares at the public offering price, that is, at the net
asset value per share next computed after receipt of a purchase order, plus a
sales charge as follows:

                                                                    Dealer
                                        Sales Charge as a % of    Allowance
                                        ----------------------    as a % of
                                                         Net     ----------
                                          Offering     Amount      Offering
       Amount of Purchase                   Price     Invested      Price
- --------------------------------------    ---------    -------   ----------
Less than $50,000                           2.50%       2.56%        2.00%
$50,000 but less than $100,000              2.00        2.06         1.75
$100,000 but less than $250,000             1.50        1.52         1.25
$500,000 but less than $1,000,000           1.00        1.01         1.00
$1,000,000 or more                           -0-         -0-       see below

   
  No sales charge is payable at the time of purchase on investments of
$1,000,000 or more or for participants in certain group plans (described
below) subject to a CDSC of 0.50% which may be imposed in the event of a
redemption of Class A shares within 12 months of purchase. See "How to Sell
Trust Shares." PFD may, in its discretion, pay a commission to broker-dealers
who initiate and are responsible for such purchases as follows: 0.50% on
sales of $1 million to $5 million; and 0.10% on the excess over $5 million.
These commissions will not be paid if the purchaser is affiliated with the
broker-dealer or if the purchase represents the reinvestment of a redemption
made during the previous 12 calendar months. Broker-dealers who receive a
commission in connection with Class A share purchases at net asset value by
401(a) or 401(k) retirement plans with 1,000 or more eligible participants or
with at least $10 million in plan assets will be required to return any
commission paid or a pro rata portion thereof if the retirement plan redeems
its shares within 12 months of purchase. See also "How to Sell Trust Shares."
In connection with PGI's acquisition of Mutual of Omaha Fund Management
Company and contingent upon the achievement of certain sales objectives, PFD
may pay to Mutual of Omaha Investor Services, Inc. 50% of PFD's retention of
any sales commission on sales of the Trust's Class A shares through such
dealer.

  The schedule of sales charges above is applicable to purchases of Class A
shares of the Trust by (i) an individual, (ii) an individual and his or her
spouse and children under the age of 21 and (iii) a trustee or other
fiduciary of a trust estate
    


                                      9
<PAGE>

   
or fiduciary account or related trusts or accounts including pension,
profit-sharing and other employee benefit trusts qualified under Section 401
or 408 of the Code, although more than one beneficiary is involved. The sales
charges applicable to a current purchase of Class A shares of the Trust by a
person listed above is determined by adding the value of shares to be
purchased to the aggregate value (at the then current offering price) of
shares of any of the other Pioneer mutual funds previously purchased and then
owned provided PFD is notified by such person or his or her broker-dealer
each time a purchase is made which would qualify. Pioneer mutual funds
include all mutual funds for which PFD serves as principal underwriter. See
the "Letter of Intention" section of the Account Application.

  Qualifying for a Reduced Sales Charge. Class A shares of the Trust may be
sold at a reduced or eliminated sales charge to certain group plans ("Group
Plans") under which a sponsoring organization makes recommendations to,
permits group solicitation of, or otherwise facilitates purchases by, its
employees, members or participants. Class A shares of the Trust may be sold
at net asset value without a sales charge to 401(k) retirement plans with 100
or more participants or at least $500,000 in plan assets. Class A shares of
the Trust may be sold at net asset value without a sales charge to Optional
Retirement Program (the "Program") participants if (i) the employer has
authorized a limited number of investment company providers for the Program,
(ii) all authorized investment company providers offer their shares to
Program participants at net asset value, (iii) the employer has agreed in
writing to actively promote the authorized investment providers to Program
participants and (iv) the Program provides for a matching contribution for
each participant contribution. Information about such arrangements is
available from PFD.

  Class A shares of the Trust may also be sold at net asset value per share
without a sales charge to: (a) current or former Trustees and officers of the
Trust and partners or employees of its legal counsel; (b) current or former
directors, officers, employees or sales representatives of PGI or its
subsidiaries; (c) current or former directors, officers, employees or sales
representatives of any subadviser or predecessor investment adviser to any
investment company for which PMC serves as investment adviser, and the
subsidiaries or affiliates of such persons; (d) current or former officers,
partners, employees or registered representatives of broker-dealers which
have entered into sales agreements with PFD; (e) members of the immediate
families of any of the persons above; (f) any trust, custodian, pension,
profit-sharing or other benefit plan of the foregoing persons; (g) insurance
company separate accounts; (h) certain "wrap accounts" for the benefit of
clients of financial planners adhering to standards established by PFD; (i)
other funds and accounts for which PMC or any of its affiliates serves as
investment adviser or manager; and (j) certain unit investment trusts. Shares
so purchased are purchased for investment purposes and may not be resold
except through redemption or repurchase by or on behalf of the Trust. The
availability of this privilege is conditioned on the receipt by PFD of
written notification of eligibility. Class A shares of the Trust may also be
issued at net asset value without a sales charge in connection with certain
reorganization, liquidation or acquisition transactions involving other
investment companies or personal holding companies.
    

  Reduced sales charges for Class A shares are available through an agreement
to purchase a specified quantity of Trust shares over a designated 13-month
period by completing the "Letter of Intention" section of the Account
Application. Information about the Letter of Intention procedure, including
its terms, is contained in the Statement of Additional Information. Investors
who are clients of a broker-dealer with a current sales agreement with PFD
may purchase Class A shares of the Trust at net asset value, without a sales
charge, to the extent that the purchase price is paid out of proceeds from
one or more redemptions by the investor of shares of certain other mutual
funds. In order for a purchase to qualify for this privilege, the investor
must document to the broker-dealer that the redemption occurred within 60
days immediately preceding the purchase of Class A shares of the Trust; that
the client paid a sales charge on the original purchase of the shares
redeemed; and that the mutual fund whose shares were redeemed also offers net
asset value purchases to redeeming shareholders of any of the Pioneer mutual
funds. Further details may be obtained from PFD.

Class B Shares

  You may buy Class B shares at net asset value without the imposition of an
initial sales charge; however, Class B shares redeemed within three years of
purchase will be subject to a CDSC at the rates shown in the table below. The
charge will be assessed on the amount equal to the lesser of the current
market value or the original purchase cost of the shares being redeemed. No
CDSC will be imposed on increases in account value above the initial purchase
price, including shares derived from the reinvestment of dividends or capital
gains distributions.

  The amount of the CDSC, if any, will vary depending on the number of years
from the time of purchase until the time of redemption of Class B shares. For
the purpose of determining the number of years from the time of any purchase,
all payments during a quarter will be aggregated and deemed to have been made
on the first day of that quarter. In processing redemptions of Class B
shares, the Trust will first redeem shares not subject to any CDSC, and then
shares held longest during the three-year period. As a result, you will pay
the lowest possible CDSC.

        Year Since              CDSC as a Percentage of Dollar
         Purchase                   Amount Subject to CDSC
- --------------------------   -----------------------------------
First                                         2.0%
Second                                        2.0%
Third                                         1.0%
Fourth and thereafter                         none


  Proceeds from the CDSC are paid to PFD and are used in whole or in part to
defray PFD's expenses related to providing distribution-related services to
the Trust in connection with the sale of Class B shares, including the
payment of compensation to broker-dealers.

  Class B shares will automatically convert into Class A shares at the end of
the calendar quarter that is five years after the purchase date, except as
noted below. Class B

                                      10
<PAGE>

   
shares acquired by exchange from Class B shares of another Pioneer mutual
fund will convert into Class A shares based on the date of the initial
purchase and the applicable CDSC. Class B shares acquired through
reinvestment of distributions will convert into Class A shares based on the
date of the initial purchase to which such shares relate. For this purpose,
Class B shares acquired through reinvestment of distributions will be
attributed to particular purchases of Class B shares in accordance with such
procedures as the Trustees may determine from time to time. The conversion of
Class B shares to Class A shares is subject to the continuing availability of
a ruling from the Internal Revenue Service ("IRS"), which the Trust has
obtained, or an opinion of counsel that such conversions will not constitute
taxable events for federal tax purposes. There can be no assurance that such
ruling or opinion will continue to be in effect at the time any particular
conversion would normally occur. The conversion of Class B shares to Class A
shares will not occur if such ruling or opinion is no longer available and,
therefore, Class B shares would continue to be subject to higher expenses
than Class A shares for an indeterminate period.
    

  Waiver or Reduction of Contingent Deferred Sales
Charge. The CDSC on Class B shares and on any Class A shares subject to a
CDSC may be waived or reduced for non-retirement accounts if: (a) the
redemption results from the death of all registered owners of an account (in
the case of UGMAs, UTMAs and trust accounts, waiver applies upon the death of
all beneficial owners) or a total and permanent disability (as defined in
Section 72 of the Code) of all registered owners occurring after the purchase
of the shares being redeemed or (b) the redemption is made in connection with
limited automatic redemptions as set forth in "Systematic Withdrawal Plans"
(limited in any year to 10% of the value of the account in the Trust at the
time the withdrawal plan is established).

   
  The CDSC on Class B shares and on any Class A shares subject to a CDSC may
be waived or reduced for retirement plan accounts if: (a) the redemption
results from the death or a total and permanent disability (as defined in
Section 72 of the Code) occurring after the purchase of the shares being
redeemed of a shareholder or participant in an employer-sponsored retirement
plan; (b) the distribution is to a participant in an IRA, 403(b) or
employer-sponsored retirement plan, is part of a series of substantially
equal payments made over the life expectancy of the participant or the joint
life expectancy of the participant and his or her beneficiary or as scheduled
periodic payments to a participant (limited in any year to 10% of the value
of the participant's account at the time the distribution amount is
established; a required minimum distribution due to the participant's
attainment of age 701/2 may exceed the 10% limit only if the distribution
amount is based on plan assets held by Pioneer); (c) the distribution is from
a 401(a) or 401(k) retirement plan and is a return of excess employee
deferrals or employee contributions or a qualifying hardship distribution as
defined by the Code or results from a termination of employment (limited with
respect to a termination to 10% per year of the value of the plan's assets in
the Trust as of the later of the prior December 31 or the date the account
was established unless the plan's assets are being rolled over to or
reinvested in the same class of shares of a Pioneer mutual fund subject to
the CDSC of the shares originally held); (d) the distribution is from an IRA,
403(b) or employer-sponsored retirement plan and is to be rolled over to or
reinvested in the same class of shares in a Pioneer mutual fund and which
will be subject to the applicable CDSC upon redemption; (e) the distribution
is in the form of a loan to a participant in a plan which permits loans (each
repayment of the loan will constitute a new sale which will be subject to the
applicable CDSC upon redemption); or (f) the distribution is from a qualified
defined contribution plan and represents a participant's directed transfer
(provided that this privilege has been pre-authorized through a prior
agreement with PFD regarding participant directed transfers).
    

  The CDSC on Class B shares and on any Class A shares subject to a CDSC may
be waived or reduced for either non-retirement or retirement plan accounts
if: (a) the redemption is made by any state, county, or city, or any
instrumentality, department, authority, or agency thereof, which is
prohibited by applicable laws from paying a CDSC in connection with the
acquisition of shares of any registered investment management company; or (b)
the redemption is made pursuant to the Trust's right to liquidate or
involuntarily redeem shares in a shareholder's account.

  Broker-Dealers. An order for either Class of Trust shares received by PFD
from a broker-dealer prior to the close of regular trading on the Exchange is
confirmed at the price appropriate for that Class as determined at the close
of regular trading on the Exchange on the day the order is received, provided
the order is received prior to PFD's close of business (usually, 5:30 p.m.
Eastern Time). It is the responsibility of broker-dealers to transmit orders
so that they will be received by PFD prior to its close of business.

  General. The Trust reserves the right in its sole discretion to withdraw all
or any part of the offering of shares when, in the judgment of the Trust's
management, such withdrawal is in the best interest of the Trust. An order to
purchase shares is not binding on, and may be rejected by, PFD until it has
been confirmed in writing by PFD and payment has been received.

VIII. HOW TO SELL TRUST SHARES

  You can arrange to sell (redeem) Trust shares on any day the Exchange is
open by selling (redeeming) either some or all of your shares to the Trust.

  You may sell your shares either through your broker-dealer or directly to
the Trust.

  (bullet) If you are selling shares from a retirement account, you must make
your request in writing (except for exchanges to other Pioneer mutual funds
which can be requested by phone or in writing). Call 1-800-622-0176 for more
information.

  (bullet) If you are selling shares from a non-retirement account, you may
use any of the methods described below.

   
  Your shares will be sold at the share price next calculated after your order
is received in good order less any applicable CDSC. Sale proceeds generally
will be sent to you in cash, nor-
    


                                      11
<PAGE>

   
mally within seven days after your order is received in good order. The Trust
reserves the right to withhold payment of the sale proceeds until checks
received by the Trust in payment for the shares being sold have cleared,
which may take up to 15 calendar days from the purchase date.

  In Writing. You may sell your shares by delivering a written request in good
order to PSC, however, you must use a written request, including a signature
guarantee, to sell your shares if any of the following situations applies:
    

  (bullet) you wish to sell over $50,000 worth of shares,

  (bullet) your account registration or address has changed within the last 30
           days,

  (bullet) the check is not being mailed to the address on your account
           (address of record),

  (bullet) the check is not being made out to the account owners, or

  (bullet) the sale proceeds are being transferred to a Pioneer account with a
           different registration.

   
  Your request should include your name, the Trust's name, your fund account
number, the Class of shares to be redeemed, the dollar amount or number of
shares to be redeemed, and any other applicable requirements as described
below. Unless instructed otherwise, PSC will send the proceeds of the sale to
the address of record. Fiduciaries or corporations are required to submit
additional documents. For more information, contact PSC at 1-800-225-6292.
    

  Written requests will not be processed until they are received in good order
and accepted by PSC. Good order means that there are no outstanding claims or
requests to hold redemptions on the account, certificates are endorsed by the
record owner(s) exactly as the shares are registered and the signature(s) are
guaranteed by an eligible guarantor. You should be able to obtain a signature
guarantee from a bank, broker, dealer, credit union (if authorized under
state law), securities exchange or association, clearing agency or savings
association. A notary public cannot provide a signature guarantee. Signature
guarantees are not accepted by facsimile ("fax"). For additional information
about the necessary documentation for redemption by mail, please contact PSC
at 1-800-225-6292.

   
  By Telephone or by Fax.  Your account is automatically authorized to have
the telephone redemption privilege unless you indicated otherwise on your
Account Application or by writing to PSC. Proper account identification will
be required for each telephone redemption. The telephone redemption option is
not available to retirement plan accounts. A maximum of $50,000 may be
redeemed by telephone or fax and the proceeds may be received by check or by
bank wire or electronic funds tranfer. To receive the proceeds by check: the
check must be made payable exactly as the account is registered and the check
must be sent to the address of record which must not have changed in the last
30 days. To receive the proceeds by bank wire or by electronic funds
transfer: the proceeds must be sent to your bank address of record which must
have been properly pre-designated either on your Account Application or on an
Account Options Form and which must not have changed in the last 30 days. To
redeem by fax, send your redemption request to 1-800-225-4240. You may always
elect to deliver redemption instructions to PSC by mail. See "Telephone
Transactions and Related Liabilities" below. Telephone and fax redemptions
will be priced as described above. You are strongly urged to consult with
your financial representative prior to requesting a telephone redemption.
    

  By Check. If requested by you, the Trust will establish a checking account
for you with The First National Bank of Omaha (the "Bank"). Checks may be
drawn for not less than $500 nor more than $250,000. When a check is
presented to the Bank for payment, it will cause the Trust to redeem, at the
net asset value next determined after presentation, a sufficient number of
your shares to cover the check. You will receive the daily dividends declared
on your shares until the day the check clears. Please allow 1 to 2 weeks for
receipt of personalized checks.

  The checking account will be subject to the Bank's rules and regulations
governing checking accounts. If there is an insufficient number of shares in
your account when a check is presented to the Bank for payment, the check
will be returned.

  Since the aggregate value of a shareholder's account in the Trust changes
each day, you should not attempt to withdraw the full amount in your account
by using a check. The checkwriting privilege is generally not available for
retirement plan accounts or accounts subject to backup withholding (see
"Retirement Plans" below).

  Selling Shares Through Your Broker-Dealer. The Trust has authorized PFD to
act as its agent in the repurchase of shares of the Trust from qualified
broker-dealers and reserves the right to terminate this procedure at any
time. Your broker-dealer must receive your request before the close of
business on the Exchange and transmit it to PFD before PFD's close of
business to receive that day's redemption price. Your broker-dealer is
responsible for providing all necessary documentation to PFD and may charge
you for its services.

  Small Accounts. The minimum account value is $500. If you hold shares of the
Trust in an account with a net asset value of less than the minimum required
amount due to redemptions or exchanges, the Trust may redeem the shares held
in this account at net asset value if you have not increased the net asset
value of the account to at least the minimum required amount within six
months of notice by the Trust to you of the Trust's intention to redeem the
shares.

   
  CDSC on Class A Shares. Purchases of Class A shares of $1,000,000 or more,
or by participants in a Group Plan which were not subject to an initial sales
charge, may be subject to a CDSC upon redemption. A CDSC is payable to PFD on
these investments in the event of a share redemption within 12 months
following the share purchase, at the rate of 0.50% of the lesser of the value
of the shares redeemed (exclusive of reinvested dividend and capital gain
distributions) or the total cost of such shares. Shares subject to the CDSC
which are exchanged into another Pioneer mutual fund will continue to be
subject to the CDSC until the original 12-month period expires. However, no
CDSC is payable upon redemption with respect to Class A shares purchased by
401(a) or 401(k) retirement plans with 1,000 or more eligible participants or
with at least $10 million in plan assets.
    


                                      12
<PAGE>

General. Redemptions may be suspended or payment postponed during any period
in which any of the following conditions exist: the Exchange is closed or
trading on the Exchange is restricted; an emergency exists as a result of
which disposal by the Trust of securities owned by it is not reasonably
practicable or it is not reasonably practicable for the Trust to fairly
determine the value of the net assets of its portfolio; or the SEC, by order,
so permits.

  Redemptions and repurchases are taxable transactions to shareholders. The
net asset value per share received upon redemption or repurchase may be more
or less than the cost of shares to an investor, depending on the market value
of the portfolio at the time of redemption or repurchase.

IX. HOW TO EXCHANGE TRUST SHARES

   
  You may not exchange Class A shares of the Trust, except as noted below, for
shares of any other Pioneer mutual funds for a period of 12 months following
their purchase; following this 12-month period, you may exchange your Class A
shares of the Trust at net asset value, without a sales charge, for shares of
the same Class of any other publicly available Pioneer mutual fund. Accounts
established under a Group Plan and Class A shares purchased at net asset
value without a sales charge are exempt from the 12-month holding period
requirement. Accounts established to utilize Automatic Exchange (see below)
for scheduled periods of 12 months or longer meet this minimum holding
period. Not all Pioneer mutual funds offer more than one Class of shares.
    

  Written Exchanges. You may exchange your shares by sending a letter of
instruction to PSC. Your letter should include your name, the name of the
fund out of which you wish to exchange and the name of the fund into which
you wish to exchange, your fund account number(s), the Class of shares to be
exchanged and the dollar amount or number of shares to be exchanged. Written
exchange requests must be signed by all record owner(s) exactly as the shares
are registered.

   
  Telephone Exchanges.  Your account is automatically authorized to have the
telephone exchange privilege unless you indicated otherwise on your Account
Application or by writing to PSC. Proper account identification will be
required for each telephone exchange. Telephone exchanges may not exceed
$500,000 per account per day. Each telephone exchange request, whether by
voice or by FactFone(SM), will be recorded. You are strongly urged to consult
with your financial representative prior to requesting a telephone exchange.
See "Telephone Transactions and Related Liabilities" below.
    

   
  Automatic Exchanges. You may automatically exchange shares from one Pioneer
mutual fund account for shares of the same Class in another Pioneer mutual
fund account on a monthly or quarterly basis. The accounts must have
identical registrations and the originating account must have a minimum
balance of $5,000. The exchange will be effective on the 18th day of the
month.

  General. Exchanges must be at least $1,000. A new Pioneer mutual fund
account opened through an exchange must have a registration identical to that
on the original account.

  Shares which would normally be subject to a CDSC upon redemption will not be
charged the applicable CDSC at the time of an exchange. Shares acquired in an
exchange will be subject to the CDSC of the shares originally held. For
purposes of determining the amount of any applicable CDSC, the length of time
you have owned shares acquired by exchange will be measured from the date you
acquired the original shares and will not be affected by any subsequent
exchange.

  Exchange requests received by PSC before 4:00 p.m. Eastern Time will be
effective on that day if the requirements below have been met, otherwise,
they will be effective on the next business day. PSC will process exchanges
only after receiving an exchange request in good order. There are currently
no fees or sales charges imposed at the time of an exchange. An exchange of
shares may be made only in states where legally permitted. For federal and
(generally) state income tax purposes, an exchange is considered to be a sale
of the shares of the Trust exchanged and a purchase of shares in another
Pioneer mutual fund. Therefore, an exchange could result in a gain or loss on
the shares sold, depending on the tax basis of these shares and the timing of
the transaction, and special tax rules may apply.

  You should consider the differences in objectives and policies of the
Pioneer mutual funds, as described in each fund's current prospectus, before
making any exchange. Each telephone exchange request, whether by voice or by
FactFone(SM), will be recorded. You are strongly urged to consult with your
financial representative prior to requesting a telephone exchange.

  For the protection of the Trust's performance and shareholders, the Trust
and PFD reserve the right to refuse any exchange request or restrict, at any
time without notice, the number and/or frequency of exchanges to prevent
abuses of the exchange privilege. Such abuses may arise from frequent trading
in response to short-term market fluctuations, a pattern of trading by an
individual or group that appears to be an attempt to "time the market," or
any other exchange request which, in the view of management, will have a
detrimental effect on the Trust's portfolio management strategy or its
operations. In addition, the Trust and PFD reserve the right to charge a fee
for exchanges or to modify, limit, suspend or discontinue the exchange
privilege with notice to shareholders as required by law.
    

   
X. DISTRIBUTION PLANS

  The Trust has adopted a Plan of Distribution for both Class A shares ("Class
A Plan") and Class B shares ("Class B Plan") in accordance with Rule 12b-1
under the 1940 Act pursuant to which certain distribution and service fees
are paid.

  Pursuant to the Class A Plan, the Trust reimburses PFD for its actual
expenditures to finance any activity primarily intended to result in the sale
of Class A shares or to provide services to holders of Class A shares,
provided the categories of expenses for which reimbursement is made are
approved by the Trust's Board of Trustees. As of the date of this Prospectus,
the Board
    


                                      13
<PAGE>

of Trustees has approved the following categories of expenses for Class A
shares of the Trust: (i) a service fee to be paid to qualified broker-dealers
in an amount not to exceed 0.25% per annum of the Trust's daily net assets
attributable to Class A shares; (ii) reimbursement to PFD for its
expenditures for broker-dealer commissions and employee compensation on
certain sales of the Trust's Class A shares with no initial sales charge (See
"How to Buy Trust Shares"); and (iii) reimbursement to PFD for expenses
incurred in providing services to Class A shareholders and supporting
broker-dealers and other organizations (such as banks and trust companies) in
their efforts to provide such services. Banks are currently prohibited under
the Glass-Steagall Act from providing certain underwriting or distribution
services. If a bank was prohibited from acting in any capacity or providing
any of the described services, management would consider what action, if any,
would be appropriate.

   
  Expenditures of the Trust pursuant to the Class A Plan are accrued daily and
may not exceed 0.25% of the Trust's average daily net assets attributable to
Class A shares. Distribution expenses of PFD are expected to substantially
exceed the distribution fees paid by the Trust in a given year. The Class A
Plan may not be amended to increase materially the annual percentage
limitation of average net assets which may be spent for the services
described therein without approval of the shareholders of the Trust. The
Class A Plan does not provide for the carryover of reimbursable expenses
beyond 12 months from the time the Trust is first invoiced for an expense.
The limited carryover provision in the Class A Plan may result in an expense
invoiced to the Trust in one fiscal year being paid in the subsequent fiscal
year and thus being treated for purposes of calculating the maximum
expenditures of the Trust as having been incurred in the subsequent fiscal
year. In the event of termination or non-continuance of the Class A Plan, the
Trust has 12 months to reimburse any expense which it incurs prior to such
termination or non-continuance, provided that payments by the Trust during
such 12-month period shall not exceed 0.25% of the Trust's average daily net
assets during such period.
    

  The Class B Plan provides that the Trust will pay a distribution fee at the
annual rate of 0.75% of the Trust's average daily net assets attributable to
Class B shares and will pay PFD a service fee at the annual rate of 0.25% of
the Trust's average daily net assets attributable to Class B shares. The
distribution fee is intended to compensate PFD for its distribution services
to the Trust. The service fee is intended to be additional compensation for
personal services and/or account maintenance services with respect to Class B
shares. PFD also receives the proceeds of any CDSC imposed on the redemption
of Class B shares.

  Commissions of 2%, equal to 1.75% of the amount invested and a first year's
service fee equal to 0.25% of the amount invested in Class B shares, are paid
to broker-dealers who have selling agreements with PFD. PFD may advance to
dealers the first year service fee at a rate up to 0.25% of the purchase
price of such shares and, as compensation therefor, PFD may retain the
service fee paid by the Trust with respect to such shares for the first year
after purchase. Dealers will become eligible for additional service fees with
respect to such shares commencing in the 13th month following the purchase.
Dealers may from time to time be required to meet certain criteria in order
to receive service fees. PFD or its affiliates are entitled to retain all
service fees payable under the Class B Plan for which there is no dealer of
record or for which qualification standards have not been met as partial
consideration for personal services and/or account maintenance services
performed by PFD or its affiliates for shareholder accounts.

XI. DIVIDENDS, DISTRIBUTIONS AND TAXATION

  The Trust has elected to be treated, has qualified, and intends to qualify
each year as a "regulated investment company" under Subchapter M of the Code
so that it will not pay federal income taxes on income and capital gains
distributed to shareholders at least annually.

  Under the Code, the Trust will be subject to a nondeductible 4% federal
excise tax on a portion of its undistributed ordinary income and capital
gains if it fails to meet certain distribution requirements with respect to
each calendar year. The Trust intends to make distributions in a timely
manner and accordingly does not expect to be subject to the excise tax.

  A state income (and possibly local income and/or intangible property) tax
exemption is generally available to the extent the Trust's distributions are
derived from interest on (or, in the case of intangibles taxes, the value of
its assets is attributable to) certain U.S. government securities, provided
in some states that certain thresholds for holdings of such securities and/or
reporting requirements are satisfied. The Trust will report annually to its
shareholders the percentage of interest income earned from U.S. government
securities during the preceding year. Each shareholder is advised to consult
his own tax adviser regarding the exemptions, if any, available under
applicable state and local law.

  In computing its income for dividend purposes, the Trust attempts to conform
its accounting to the requirements for federal income tax purposes.

   
  Each business day the Trust declares a dividend consisting of substantially
all of the Trust's net investment income (which includes earned interest and
certain other income, less expenses). Shareholders begin earning dividends on
the first business day following receipt of payment for purchased shares.
Shares continue to earn dividends up to and including the date of redemption.
Dividends are normally paid on the last business day of the month or shortly
thereafter. Monthly distributions may also include a portion of any original
issue discount, market discount, income from securities lending, certain net
realized foreign exchange gains, and any net short-term capital gains
realized by the Trust. Distributions from net long-term capital gains, if
any, will be made annually, generally in December. Additional distributions
may be made at such other times as may be necessary to avoid federal income
or excise tax on the Trust.
    

  Unless shareholders specify otherwise, all distributions will be
automatically reinvested in additional full and fractional shares of the
Trust. The Trust's monthly dividend distributions from the sources described
above are taxable as ordinary income, and dividends from the Trust's net
long-

                                      14
<PAGE>

   
term capital gains are taxable as long-term capital gains, regardless of your
holding period for the shares of the Trust. For federal income tax purposes,
all dividends are taxable as described above, whether a shareholder takes
them in cash or reinvests them in additional shares of the Trust. Information
as to the federal tax status of dividends and distributions will be provided
annually to shareholders. For further information on the distribution options
available to shareholders, see "Distribution Options" and "Directed
Dividends" below.
    

  The Trust may be subject to foreign withholding taxes or other foreign taxes
on income (possibly including some capital gains) from certain foreign
investments. The Trust expects that it generally will not qualify to pass
such taxes through to its shareholders, who consequently generally will
neither include such taxes in their gross incomes nor be entitled to
associated foreign tax credits or deductions.

   
  Dividends and other distributions and the proceeds of redemptions,
repurchases or exchanges of Trust shares paid to individuals and other
non-exempt payees will be subject to 31% backup withholding of federal income
tax if the Trust is not provided with the shareholder's correct taxpayer
identification number and certification that the number is correct and the
shareholder is not subject to such backup withholding or the Trust receives
notice from the IRS or a broker that such withholding applies. Please refer
to the Account Application for additional information.
    

  The description above relates only to U.S. federal income tax consequences
for shareholders who are U.S. persons, i.e., U.S. citizens or residents, or
U.S. corporations, partnerships, trusts or estates and who are subject to
U.S. federal income taxes. Non-U.S. shareholders and tax-exempt shareholders
are subject to different tax treatment that is not described above.
Shareholders should consult their own tax advisers regarding state, local and
other applicable tax laws.

XII. SHAREHOLDER SERVICES

  PSC is the shareholder services and transfer agent for shares of the Trust.
PSC, a Massachusetts corporation, is a wholly-owned subsidiary of PGI. PSC's
offices are located at 60 State Street, Boston, Massachusetts 02109, and
inquiries to PSC should be mailed to Pioneering Services Corporation, P.O.
Box 9014, Boston, Massachusetts 02205-9014. Brown Brothers Harriman & Co.
("the Custodian") serves as the custodian of the Trust's portfolio securities
and other assets. The principal business address of the mutual funds division
of the Custodian is 40 Water Street, Boston, Massachusetts 02109.

Account and Confirmation Statements

  PSC maintains an account for each shareholder and all transactions of the
shareholder are recorded in this account. Confirmation statements showing the
details of transactions are sent to shareholders as transactions occur,
except automatic investment plan transactions which are confirmed quarterly.
The Combined Account Statement, mailed quarterly, is available to
shareholders who have more than one Pioneer account.

  Shareholders whose shares are held in the name of a broker-dealer or other
party will not normally have an account with the Trust and might not be able
to utilize some of the services available to shareholders of record. Examples
of services that might not be available are investment or redemption of
shares by mail, automatic reinvestment of dividends and capital gains
distributions, withdrawal plans, Letters of Intention, Rights of
Accumulation, telephone exchanges and redemptions and newsletters.

Additional Investments

  You may add to your account by sending a check ($100 minimum for Class A
shares and $500 for Class B shares) to PSC (account number and Class of
shares should be clearly indicated). The bottom portion of a confirmation
statement may be used as a remittance slip to make additional investments.

  Additions to your account, whether by check or through a Pioneer
Investomatic Plan, are invested in full and fractional shares of the Trust at
the applicable offering price in effect as of the close of the Exchange on
the day of receipt.

Automatic Investment Plans

  You may arrange for regular automatic investments of $50 or more through
government/military allotments, payroll deduction or through a Pioneer
Investomatic Plan. A Pioneer Investomatic Plan provides for a monthly or
quarterly investment by means of a pre-authorized electronic funds transfer
or draft drawn on a checking account. Pioneer Investomatic Plan investments
are voluntary and you may discontinue the Plan without penalty upon 30 days'
written notice to PSC. PSC acts as agent for the purchasers, the
broker-dealer and PFD in maintaining these plans.

Financial Reports and Tax Information

  As a shareholder, you will receive financial reports at least semi-
annually. In January of each year the Trust will mail to you information
about the tax status of dividends and distributions.

Distribution Options

  Dividends and capital gains distributions, if any, will automatically be
invested in additional shares of the Trust, at the applicable net asset value
per share, unless you indicate another option on the Account Application.

  Two other options available are (a) dividends in cash and capital gains
distributions in additional shares; and (b) all dividends and capital gains
distributions in cash. These two options are not available, however, for
retirement plans or an account with a net asset value of less than $500.
Changes in your distribution options may be made by written request to PSC.

Directed Dividends

   
  You may elect (in writing) to have the dividends paid by one Pioneer mutual
fund account invested in a second Pioneer mutual fund. The value of this
second account must be at least $1,000 ($500 for Pioneer Fund or Pioneer II).
Invested dividends may be in any amount, and there are no fees or charges for
this service. Retirement plan shareholders may only direct dividends to
accounts with identical registrations; i.e., "PGI IRA Cust for John Smith"
may only go into another account registered "PGI IRA Cust for John Smith."
    

Direct Deposit

  If you have elected to take distributions, whether dividends or dividends
and capital gains, in cash, or have established a Sys-

                                      15
<PAGE>

tematic Withdrawal Plan, you may choose to have those cash payments deposited
directly into your savings, checking or NOW bank account. You may establish
this service by completing the appropriate section on the Account Application
when opening a new account or the Account Options Form for an existing
account.

Voluntary Tax Withholding

  You may request (in writing) that PSC withhold 28% of the dividends and
capital gain distributions paid from an account (before any reinvestment) and
forward the amount withheld to the IRS as a credit against federal income
taxes. This option is not available for retirement plan accounts or for
accounts subject to backup withholding.

Telephone Transactions and Related Liabilities

   
  Your account is automatically authorized to have telephone transaction
privileges unless you indicate otherwise on your Account Application or by
writing to PSC. You may purchase, sell or exchange Trust shares by telephone.
See "Share Price" for more information. For personal assistance, call
1-800-225-6292 between 8:00 a.m. and 9:00 p.m. Eastern Time on weekdays.
Computer-assisted transactions may be available to shareholders who have
pre-recorded certain bank information (see "FactFone(SM)"). You are strongly
urged to consult with your financial representative prior to requesting any
telephone transaction. To confirm that each transaction instruction received
by telephone is genuine, the Trust will record each telephone transaction,
require the caller to provide the personal identification number ("PIN") for
the account and send you a written confirmation of each telephone
transaction. Different procedures may apply to accounts that are registered
to non-U.S. citizens or that are held in the name of an institution or in the
name of an investment broker-dealer or other third-party. If reasonable
procedures, such as those described above, are not followed, the Trust may be
liable for any loss due to unauthorized or fraudulent instructions. The Trust
may implement other procedures from time to time. In all other cases, neither
the Trust, PSC or PFD will be responsible for the authenticity of
instructions received by telephone, therefore, you bear the risk of loss for
unauthorized or fraudulent telephone transactions.
    

  During times of economic turmoil or market volatility or as a result of
severe weather or a natural disaster, it may be difficult to contact the
Trust by telephone to institute a redemption or exchange. You should
communicate with the Trust in writing if you are unable to reach the Trust by
telephone.

   
FactFone(SM)

  FactFone(SM)is an automated inquiry and telephone transaction system
available to Pioneer shareholders by dialing 1-800-225-4321. FactFone(SM)
allows you to obtain current information on your Pioneer mutual fund accounts
and to inquire about the prices and yields of all publicly available Pioneer
mutual funds. In addition, you may use FactFone(SM) to make computer-assisted
telephone purchases, exchanges and redemptions from your Pioneer accounts if
you have activated your PIN. Telephone purchases and redemptions require the
establishment of a bank account of record. You are strongly urged to consult
with your financial representative prior to requesting any telephone
transaction. Shareholders whose accounts are registered in the name of a
broker-dealer or third party may not be able to use FactFone(SM). See "How to
Buy Trust Shares," "How to Exchange Trust Shares," "How to Sell Trust Shares"
and "Telephone Transactions and Related Liabilities." Call PSC for
assistance.
    

Retirement Plans

  Interested persons should contact the Retirement Plans Department of PSC at
1-800-622-0176 for information relating to retirement plans for businesses,
age-weighted profit sharing plans, Simplified Employee Pension Plans, IRAs,
Section 401(k) salary reduction plans and Section 403(b) retirement plans for
employees of certain non-profit organizations and public school systems, all
of which are available in conjunction with investments in the Trust. The
Account Application accompanying this Prospectus should not be used to
establish such plans. Separate applications are required.

Telecommunications Device for the Deaf (TDD)

  If you have a hearing disability and your own TDD keyboard equipment, you
can call our TDD number toll-free at 1-800-225-1997, weekdays from 8:30 a.m.
to 5:30 p.m. Eastern Time, to contact our telephone representatives with
questions about your account.

Systematic Withdrawal Plans

  If your account has a total value of at least $10,000, you may establish a
Systematic Withdrawal Plan ("SWP") providing for fixed payments at regular
intervals. Withdrawals from Class B share accounts are limited to 10% of the
value of the account at the time the plan is implemented. See "Waiver or
Reduction of Contingent Deferred Sales Charge" for more information. Periodic
checks of $50 or more will be sent to you, or any person designated by you,
monthly or quarterly, and your periodic redemptions of shares may be taxable
to you. Payments can be made either by check or electronic transfer to a bank
account designated by you. If you direct that withdrawal checks be paid to
another after you have opened your account, a signature guarantee must
accompany your instructions. Purchases of Class A shares of the Trust at a
time when you have a SWP in effect may result in the payment of unnecessary
sales charges and may therefore be disadvantageous.

  You may obtain additional information by calling PSC at 1-800-225-6292 or by
referring to the Statement of Additional Information.

Reinstatement Privilege (Class A Shares Only)

  If you redeem all or part of your Class A shares of the Trust, you may
reinvest all or part of the redemption proceeds without a sales charge in
Class A shares of the Trust if you send a written request to PSC not more
than 90 days after your shares were redeemed. Your redemption proceeds will
be reinvested at the next determined net asset value of the Class A shares of
the Trust in effect immediately after receipt of the written request for
reinstatement. You may realize a gain or loss for federal income tax purposes
as a result of the redemption, and special tax rules apply if a reinvestment
occurs. Subject to the provisions outlined under "How to Exchange Trust
Shares" above, you may also reinvest in Class A shares of other Pioneer
mutual funds; in this case

                                      16
<PAGE>

you must meet the minimum investment requirements for each fund you enter.

  The 90-day reinstatement period may be extended by PFD for periods of up to
one year for shareholders living in areas that have experienced a natural
disaster, such as a flood, hurricane, tornado, or earthquake.

   The options and services available to shareholders, including the terms of
the Exchange Privilege and the Pioneer Investomatic Plan, may be revised,
suspended, or terminated at any time by PFD or by the Trust. You may
establish the services described in this section when you open your account.
You may also establish or revise many of them on an existing account by
completing an Account Options Form, which you may obtain by calling
1-800-225-6292.

XIII. THE TRUST

   
  The Trust is a diversified open-end management investment company (commonly
referred to as a mutual fund) organized as a Massachusetts business trust on
August 10, 1992. The Trust has authorized an unlimited number of shares of
beneficial interest and the Trustees are authorized to create additional
series of the Trust. The Trust is not required to hold annual meetings,
although special meetings may be called for the purposes of electing or
removing Trustees, changing fundamental investment restrictions or approving
a management contract. The Trustees have the authority, without further
shareholder approval, to classify and reclassify the shares of the Trust, or
any new series of the Trust, into one or more classes. As of the date of this
Prospectus, the Trustees have authorized the issuance of two Classes of
shares, designated Class A and Class B. The shares of each Class represent an
interest in the same portfolio of investments of the Trust. Each Class has
equal rights as to voting, redemption, dividends and liquidation, except that
each Class bears different distribution and transfer agent fees and may bear
other expenses properly attributable to the particular Class. Class A and
Class B shareholders have exclusive voting rights with respect to the Rule
12b-1 distribution plans adopted by holders of those shares in connection
with the distribution of shares.
    

XIV. INVESTMENT RESULTS

  The average annual total return (for a designated period of time) on an
investment in the Trust may be included in advertisements, and furnished to
existing or prospective shareholders. The average annual total return for
each Class is computed in accordance with the SEC's standardized formula. The
calculation for all Classes assumes the reinvestment of all dividends and
distributions at net asset value and does not reflect the impact of federal
or state income taxes. In addition, for Class A shares the calculation
assumes the deduction of the maximum sales charge of 2.50%; for Class B
shares the calculation reflects the deduction of any applicable CDSC. The
periods illustrated would normally include one, five and ten years (or since
the commencement of the public offering of the shares of a Class, if shorter)
through the most recent calendar quarter.

  One or more additional measures and assumptions, including but not limited
to historical total returns; distribution returns; results of actual or
hypothetical investments; changes in dividends, distributions or share
values; or any graphic illustration of such data may also be used. These data
may cover any period of the Trust's existence and may or may not include the
impact of sales charges, taxes or other factors.

   
  Other investments or savings vehicles and/or unmanaged market indexes,
indicators of economic activity or averages of mutual funds results may be
cited or compared with the investment results of the Trust. Rankings or
listings by magazines, newspapers or independent statistical or rating
services, such as Lipper Analytical Services, Inc., may also be referenced.
    

  The Trust's investment results will vary from time to time depending on
market conditions, the composition of the Trust's portfolio and operating
expenses of the Trust. All quoted investment results are historical and
should not be considered representative of what an investment in the Trust
may earn in any future period. For further information about the calculation
methods and uses of the Trust's investment results, see the Statement of
Additional Information.

                                      17
<PAGE>

   
                                    Notes
    

                                      18
<PAGE>

   
THE PIONEER FAMILY OF MUTUAL FUNDS

International Growth Funds

  Pioneer International Growth Fund
  Pioneer Europe Fund
  Pioneer Emerging Markets Fund
  Pioneer India Fund

Growth Funds

  Pioneer Capital Growth Fund
  Pioneer Mid-Cap Fund
  Pioneer Growth Shares
  Pioneer Small Company Fund
  Pioneer Gold Shares

Growth and Income Funds

  Pioneer Equity-Income Fund
  Pioneer Fund
  Pioneer II
  Pioneer Real Estate Shares

Income Funds

  Pioneer Short-Term Income Trust
  Pioneer America Income Trust
  Pioneer Bond Fund
  Pioneer Income Fund

Tax-Free Income Funds

  Pioneer Intermediate Tax-Free Fund*
  Pioneer Tax-Free Income Fund*

Money Market Fund

  Pioneer Cash Reserves Fund

 *Not suitable for retirement accounts
    


                                      19
<PAGE>

[PIONEER LOGO]

Pioneer
Short-Term
Income Trust

60 State Street
Boston, Massachusetts 02109

OFFICERS
JOHN F. COGAN, JR., Chairman and President
DAVID D. TRIPPLE, Executive Vice President
RICHARD A. SCHLANGER, Vice President
WILLIAM H. KEOUGH, Treasurer
JOSEPH P. BARRI, Secretary

INVESTMENT ADVISER
PIONEERING MANAGEMENT CORPORATION

PRINCIPAL UNDERWRITER
PIONEER FUNDS DISTRIBUTOR, INC.

CUSTODIAN
BROWN BROTHERS HARRIMAN & CO.

INDEPENDENT PUBLIC ACCOUNTANTS
ARTHUR ANDERSEN LLP

LEGAL COUNSEL
HALE AND DORR

SHAREHOLDER SERVICES AND TRANSFER AGENT
PIONEERING SERVICES CORPORATION
60 State Street
Boston, Massachusetts 02109
Telephone: 1-800-225-6292

   
SERVICE INFORMATION
If you would like information on the following, please call:

Existing accounts and new accounts, prospectuses,
 applications, service forms and
 telephone transactions  ...................................... 1-800-225-6292
FactFone(SM)
 Automated fund yields, automated prices
 and account information ...................................... 1-800-225-4321
Retirement plans .............................................. 1-800-622-0176
Toll-free fax ................................................. 1-800-225-4240
Telecommunications Device for the Deaf (TDD) .................. 1-800-225-1997
    



   
0396-3258
(C) Pioneer Funds Distributor, Inc.
    


<PAGE>


                         PIONEER SHORT-TERM INCOME TRUST
                                 60 State Street
                           Boston, Massachusetts 02109

                       STATEMENT OF ADDITIONAL INFORMATION

                           Class A and Class B Shares

   
                                 March 29, 1996



         This Statement of Additional  Information  (Part B of the  Registration
Statement)  is not a  Prospectus,  but  should be read in  conjunction  with the
Prospectus (the "Prospectus")  dated March 29, 1996 of Pioneer Short-Term Income
Trust (the "Trust").  A copy of the Prospectus can be obtained free of charge by
calling  Shareholder  Services at  1-800-225-6292  or by written  request to the
Trust at 60 State  Street,  Boston,  Massachusetts  02109.  The Annual Report to
Shareholders dated November 30, 1995 is attached to this Statement of Additional
Information  and is  hereby  incorporated  into  this  Statement  of  Additional
Information by reference.
    

                                TABLE OF CONTENTS

                                                                      Page

   
1.  Investment Policies and Restrictions...............................  1
2.  Management of the Trust............................................  6
3.  Investment Adviser................................................. 10
4.  Underwriting Agreement and Distribution Plans...................... 11
5.  Shareholder Servicing/Transfer Agent............................... 13
6.  Custodian.......................................................... 13
7.  Principal Underwriter.............................................. 14
8.  Independent Public Accountants..................................... 14
9.  Portfolio Transactions............................................. 14
10. Tax Status......................................................... 16
11. Description of Shares.............................................. 18
12. Certain Liabilities................................................ 19
13. Determination of Net Asset Value................................... 19
14. Systematic Withdrawal Plan......................................... 20
15. Letter of Intention................................................ 21
16. Investment Results................................................. 21
17. Financial Statements............................................... 25
    

    Appendix A......................................................... 29
    Appendix B......................................................... 31
    Appendix C......................................................... 41


 THIS STATEMENT OF ADDITIONAL INFORMATION IS NOT A PROSPECTUS AND IS AUTHORIZED
FOR DISTRIBUTION TO PROSPECTIVE INVESTORS ONLY IF PRECEDED OR ACCOMPANIED BY AN
                             EFFECTIVE PROSPECTUS.



<PAGE>


1.   INVESTMENT POLICIES AND RESTRICTIONS

The  Prospectus  of the  Trust  identifies  the  investment  objective  and  the
principal  investment  policies of the Trust.  Other investment  policies of the
Trust  are set  forth  below.  The  Trust's  investment  adviser  is  Pioneering
Management Company ("PMC").

Asset-Backed Securities

The Trust may  invest in  asset-backed  securities,  which are  securities  that
represent a  participation  in, or are secured by and payable  from, a stream of
payments generated by particular  assets,  most often a pool or pools of similar
assets (e.g., trade receivables). The credit quality of these securities depends
primarily  upon the  quality  of the  underlying  assets and the level of credit
support and/or enhancement provided.

The underlying assets (e.g., loans) are subject to prepayments which shorten the
securities'  weighted average maturity and may lower their return. If the credit
support or enhancement  is exhausted,  losses or delays in payment may result if
the required payments of principal and interest are not made. The value of these
securities also may change because of changes in the market's  perception of the
creditworthiness  of the  servicing  agent for the pool,  the  originator of the
pool,  or the financial  institution  or trust  providing the credit  support or
enhancement.

Mortgage-Backed Securities

The Trust may invest in  mortgage-backed  securities issued or guaranteed by the
U.S. government, its agencies or instrumentalities and private entities. Some of
these securities,  such as GNMA  certificates,  are backed by the full faith and
credit of the U.S. Treasury while others, such as Freddie Mac certificates,  are
not.

Mortgage-backed  securities are securities  representing  interests in a pool of
mortgages.  Principal  and  interest  payments  made  on  the  mortgages  in the
underlying   mortgage  pool  are  passed  through  to  the  Trust.   Unscheduled
prepayments of principal  shorten the securities'  weighted average life and may
lower their total return.  The value of these securities also may change because
of changes in the market's  perception  of the  creditworthiness  of the federal
agency that issued them. In addition,  the mortgage securities market in general
may  be  adversely  affected  by  changes  in  governmental  regulations  or tax
policies.

When-Issued Securities

The Trust may from time to time purchase  securities on a  "when-issued"  basis,
provided that at any time not more than 5% of the Trust's net assets may consist
of  "when-issued"  securities.  The  price  of  such  securities,  which  may be
expressed in yield  terms,  is fixed at the time the  commitment  to purchase is
made, but delivery and payment for the  when-issued  securities  take place at a
later date.  It is possible that the value of such  securities  will increase or
decrease prior to the Trust's actual receipt of them.  Normally,  the settlement
date occurs within one month of the purchase.

                                      -2-
<PAGE>

Securities of Foreign Issuers

The Trust may invest in securities  issued by foreign  issuers and securities of
foreign branches of U.S. banks, such as negotiable certificates of deposit. Such
investments are subject to the Trust's quality and maturity standards (set forth
in the Prospectus).

Forward Foreign Currency Transactions

The foreign currency transactions of the Trust may be conducted on a spot, i.e.,
cash,  basis at the spot rate for purchasing or selling  currency  prevailing in
the foreign  exchange  market.  The Trust also has  authority to deal in forward
foreign  currency  exchange  contracts  involving  currencies  of the  different
countries in which it will invest as a hedge against possible  variations in the
foreign  exchange rate between these  currencies  and the U.S.  dollar.  This is
accomplished  through  contractual  agreements  to  purchase or sell a specified
currency at a specified  future date and price set at the time of the  contract.
The Trust's  dealings in forward foreign  currency  contracts will be limited to
hedging either specific transactions or portfolio positions. Transaction hedging
is the purchase or sale of forward  foreign  currency  contracts with respect to
specific  receivables or payables of the Trust  accruing in connection  with the
purchase and sale of its portfolio securities denominated in foreign currencies.
Portfolio  hedging is the use of forward  foreign  currency  contracts to offset
portfolio security positions  denominated or quoted in such foreign  currencies.
There is no guarantee that the Trust will be engaged in hedging  activities when
adverse  exchange rate movements  occur. The Trust will not attempt to hedge all
of its foreign portfolio positions and will enter into such transactions only to
the extent, if any, deemed  appropriate by the Trust's investment  adviser.  The
Trust will not enter into speculative forward foreign currency contracts.

If the Trust enters into a forward  contract to purchase foreign  currency,  its
custodian  bank will  segregate  cash or high grade liquid debt  securities in a
separate  account  of the Trust in an amount  equal to the value of the  Trust's
total assets  committed to the  consummation  of such  forward  contract.  Those
assets  will be  valued at  market  daily and if the value of the  assets in the
separate account  declines,  additional cash or securities will be placed in the
account so that the value of the  account  will equal the amount of the  Trust's
commitment with respect to such contracts.

Hedging  against  a  decline  in the  value of a  currency  does  not  eliminate
fluctuations  in the prices of  portfolio  securities  or prevent  losses if the
prices of such securities decline.  Such transactions also limit the opportunity
for gain if the value of the hedged currency should rise.  Moreover,  it may not
be possible for the Trust to hedge  against a  devaluation  that is so generally
anticipated  that the Trust is not able to  contract  to sell the  currency at a
price above the devaluation level it anticipates.

The cost to the Trust of engaging in foreign currency  transactions  varies with
such factors as the currency involved,  the size of the contract,  the length of
the  contract  period  and  the  market   conditions  then   prevailing.   Since
transactions in foreign currency and forward  contracts are usually conducted on
a principal basis, no fees or commissions are involved.  The Trust may close out
a forward  position in a currency  by selling  the forward  contract or entering
into an offsetting forward contract.

                                      -3-
<PAGE>

Lending of Portfolio Securities

The Trust may lend  portfolio  securities  to member firms of the New York Stock
Exchange,  under  agreements  which  would  require  that the  loans be  secured
continuously  by collateral in cash,  cash  equivalents  or U.S.  Treasury Bills
maintained on a current basis at an amount at least equal to the market value of
the securities loaned. The Trust would continue to receive the equivalent of the
interest  paid by the issuer on the  securities  loaned  and would also  receive
compensation  based on  investment  of the  collateral.  The  Trust  would  not,
however,  have the right to vote any securities  having voting rights during the
existence of the loan, but would call the loan in  anticipation  of an important
vote to be taken among holders of the securities or of the giving or withholding
of their consent on a material matter affecting the investment.

As with other  extensions of credit there are risks of delay in recovery or even
loss of rights in the  collateral  should the  borrower of the  securities  fail
financially.  The  Trust has no  present  intention  to  engage in any  material
portfolio lending in the future.  The Trust will lend portfolio  securities only
to firms which have been  approved in advance by the Trust's  Board of Trustees,
which will  monitor the  creditworthiness  of any such  firms.  The value of the
securities loaned will not exceed 5% of the value of the Trust's total assets.

Restricted Securities

The Trust may  invest up to 5% of its total  assets in  "restricted  securities"
(i.e.,  securities that would be required to be registered prior to distribution
to the public),  including restricted  securities eligible for resale to certain
institutional  investors pursuant to Rule 144A under the Securities Act of 1933.
The  Board of  Trustees  may  adopt  guidelines  and  delegate  to PMC the daily
function of determining  and monitoring the liquidity of restricted  securities.
The  Board,   however,  will  retain  sufficient  oversight  and  be  ultimately
responsible  for the  determinations.  Since it is not  possible to predict with
assurance  exactly how this market for  restricted  securities  sold and offered
under Rule 144A will  develop,  the Board will  carefully  monitor  the  Trust's
investments  in these  securities,  focusing on such  important  factors,  among
others, as valuation, liquidity and availability of information. This investment
practice  could have the effect of increasing  the level of  illiquidity  in the
Trust to the  extent  that  qualified  institutional  buyers  become  for a time
uninterested in purchasing these restricted securities.

Investment Restrictions

Fundamental Investment  Restrictions.  The Trust has adopted certain fundamental
investment restrictions which may not be changed without the affirmative vote of
the holders of a majority of the Trust's outstanding voting securities.  As used
in the Prospectus and Statement of Additional  Information,  such approval means
the  approval  of the  lesser of (i) the  holders  of 67% or more of the  shares
represented  at a meeting  if the  holders  of more than 50% of the  outstanding
shares are  present in person or by proxy,  or (ii) the holders of more than 50%
of the outstanding shares.

         The Trust may not:

         (1)Issue senior securities,  except as permitted by paragraphs (2), (6)
and (7) below.  For  purposes  of this  restriction,  the  issuance of shares of
beneficial  interest  in  multiple  classes or series,  the  purchase or sale of
options,   futures   contracts  and  options  on  futures   contracts,   forward
commitments,  forward  foreign  exchange  contracts  and  repurchase  agreements
entered into in 


                                      -4-
<PAGE>

accordance  with the Trust's  investment  policy,  and the  pledge,  mortgage or
hypothecation  of the Trust's  assets  within the meaning of paragraph (3) below
are not deemed to be senior securities.

         (2)Borrow  money,   except  from  banks  as  a  temporary  measure  for
extraordinary emergency purposes in amounts not to exceed 33 1/3% of the Trust's
total assets  (including the amount  borrowed) taken at market value.  The Trust
will not use leverage to attempt to increase income. The Trust will not purchase
securities while outstanding borrowings exceed 5% of the Trust's total assets.

         (3)Pledge,  mortgage,  or  hypothecate  its  assets,  except  to secure
indebtedness  permitted by paragraph  (2) above and then only if such  pledging,
mortgaging or hypothecating  does not exceed 33 1/3% of the Trust's total assets
taken at market value.

         (4)Act as an underwriter, except to the extent that, in connection with
the  disposition  of  portfolio  securities,  the  Trust  may be deemed to be an
underwriter for purposes of the Securities Act of 1933.

         (5)Purchase  or sell real estate or any interest  therein,  except that
the Trust  may  invest  in  securities  secured  by real  estate  or  marketable
interests  therein or  securities  issued by  companies  (other than real estate
limited partnerships) that invest in real estate or interests therein.

         (6)Make  loans,  except that the Trust may lend  portfolio  securities,
enter into repurchase  agreements,  and purchase bank certificates of deposit, a
portion  of an issue of  publicly  distributed  bonds,  bank loan  participation
agreements,  bankers' acceptances,  debentures and other securities,  whether or
not the  purchase  is made upon the  original  issuance  of the  securities,  in
accordance with its investment policies.

         (7)Invest in commodities or commodity  contracts or in puts,  calls, or
combinations  of both,  except  interest  rate  futures  contracts,  options  on
securities,  securities  indices,  currency  and  other  financial  instruments,
futures  contracts  on  securities,   securities  indices,  currency  and  other
financial  instruments  and options on such futures  contracts,  forward foreign
currency exchange contracts,  forward commitments,  securities index put or call
warrants and repurchase  agreements  entered into in accordance with the Trust's
investment policies.

         (8)Purchase  securities of an issuer  (other than the U.S.  Government,
its agencies or instrumentalities), if

         (a)such  purchase  would cause more than 5% of the Trust's total assets
taken at market value to be invested in the securities of such issuer, or

         (b)such  purchase  would at the  time  result  in more  than 10% of the
outstanding voting securities of such issuer being held by the Trust.

With the  exception of forward  foreign  currency  exchange  contracts,  forward
commitments and repurchase agreements,  the Trust does not intend to invest more
than 5% of its assets during the current  fiscal year in any of the  investments
permitted by the exceptions set forth in paragraph (7) above.

It is the policy of the Trust not to concentrate  its  investments in securities
of  companies  in any  particular  industry.  In the opinion of the staff of the
Securities and Exchange Commission 


                                      -5-
<PAGE>

(the "SEC"),  investments  are  concentrated  in a  particular  industry if such
investments  aggregate  25% or more of the  Trust's  total  assets.  The Trust's
policy does not apply to investments in U.S. Government Securities.

Non-fundamental  Investment  Restrictions.  The following restrictions have been
designated as non-fundamental  and may be changed by a vote of the Trust's Board
of Trustees without  approval of  shareholders.  The Trust has agreed to many of
these non-fundamental restrictions in connection with the offering of its shares
in various states and foreign countries.

         The Trust may not:

         (a)Participate on a  joint-and-several  basis in any securities trading
account.  The  "bunching"  of  orders  for the sale or  purchase  of  marketable
portfolio  securities with other accounts under the management of the investment
adviser to save  commissions  or to average  prices  among them is not deemed to
result in a securities trading account.

         (b)Purchase  securities  on margin or make short sales unless by virtue
of its  ownership  of other  securities,  the  Trust  has the  right  to  obtain
securities  equivalent  in kind and amount to the  securities  sold and,  if the
right is conditional, the sale is made upon the same conditions, except that the
Trust may obtain such  short-term  credits as may be necessary for the clearance
of  purchases  and  sales of  securities  and in  connection  with  transactions
involving forward foreign currency exchange transactions.

         (c)Purchase  a  security  if,  as a  result,  (i) more  than 10% of the
Trust's  assets  would  be  invested  in  securities  of  closed-end  investment
companies,  (ii)  such  purchase  would  result  in more  than  3% of the  total
outstanding  voting  securities of any one such  closed-end  investment  company
being held by the Trust,  or (iii) more than 5% of the Trust's  assets  would be
invested  in any one such  closed-end  investment  company.  The Trust  will not
invest in the securities of any open-end investment company.

         (d)Purchase   securities  of  any  issuer  which,   together  with  any
predecessor,  has a record of less than three years' continuous operations prior
to the purchase if such  purchase  would cause  investments  of the Trust in all
such issuers to exceed 5% of the value of the total assets of the Trust.

         (e)Invest  in  companies  for the  purpose  of  exercising  control  or
management.

         (f)Purchase  warrants of any issuer, if, as a result of such purchases,
more  than 2% of the  value of the  Trust's  net  assets  would be  invested  in
warrants  which are not listed on the New York Stock  Exchange  or the  American
Stock Exchange or more than 5% of the value of the net assets of the Trust would
be invested in warrants generally, whether or not so listed. For these purposes,
warrants are to be valued at the lesser of cost or market, but warrants acquired
by the Trust in units with or attached to debt securities  shall be deemed to be
without value.

         (g)Knowingly  purchase or retain securities of an issuer if one or more
of the  Trustees  or  officers  of the Trust or  directors  or  officers  of the
investment  adviser or any  investment  management  subsidiary of the investment
adviser   individually  owns  beneficially  more  than  0.5%  and  together  own
beneficially more than 5% of the securities of such issuer.

                                      -6-
<PAGE>

         (h)Purchase   interests  in  oil,  gas  or  other  mineral   leases  or
exploration programs;  however, this policy will not prohibit the acquisition of
securities of companies engaged in the production or transmission of oil, gas or
other minerals.

         (i)Invest in any security,  including any repurchase agreement maturing
in more than seven days,  which is illiquid if more than 15% of the total assets
of the Trust, taken at market value, would be invested in such securities.

         (j)Purchase puts, calls, straddles, spreads and any combination thereof
if the value of its  investment in such  securities  will exceed 5% of its total
assets.

         (k)Write  put or call  options,  or enter into futures  contracts  with
respect to more than 25% of its net assets.

Many of these  restrictions  may not be  changed  without  the  approval  of the
regulatory agencies in such states or foreign countries.

2.   MANAGEMENT OF THE TRUST

The Trust's Board of Trustees provides broad supervision over the affairs of the
Trust. The officers of the Trust are responsible for the Trust's operations. The
Trustees and  executive  officers of the Trust are listed  below,  together with
their principal  occupations  during the past five years. An asterisk  indicates
those Trustees who are interested persons of the Trust within the meaning of the
Investment Company Act of 1940, as amended (the "1940 Act").

   
         JOHN F. COGAN, JR.*, Chairman of the Board, President and Trustee, DOB:
June 1926
         President, Chief Executive Officer and a Director of The Pioneer Group,
Inc.  ("PGI");  Chairman  and a Director of  Pioneering  Management  Corporation
("PMC") and Pioneer  Funds  Distributor,  Inc.  ("PFD");  Director of Pioneering
Services   Corporation   ("PSC"),   Pioneer  Capital   Corporation  ("PCC")  and
Forest-Starma (a Russian  corporation);  President and Director of Pioneer Plans
Corporation  ("PPC"),  Pioneer  Investment  Corp.  ("PIC"),  Pioneer  Metals and
Technology,  Inc. ("PMT"), Pioneer International Corp. ("PIntl"),  Pioneer First
Russia, Inc. ("First Russia") and Pioneer Omega, Inc. ("Omega"); Chairman of the
Board  and  Director  of  Pioneer   Goldfields  Limited  ("PGL")  and  Teberebie
Goldfields  Limited;   Chairman  of  the  Supervisory  Board  of  Pioneer  Fonds
Marketing,  GmbH ("Pioneer  GmbH");  Member of the Supervisory  Board of Pioneer
First Polish Trust Fund Joint Stock Company  ("PFPT");  Chairman,  President and
Trustee of all of the Pioneer  mutual funds and Partner,  Hale and Dorr (counsel
to the Trust).

         RICHARD H. EGDAHL, M.D., Trustee,  DOB: December 1926 Boston University
Health Policy Institute, 53 Bay State Rd., Boston, MA 02115
         Professor  of  Management,  Boston  University  School  of  Management;
Professor of Public Health, Boston University School of Public Health; Professor
of Surgery,  Boston University School of Medicine;  Director,  Boston University
Health Policy  Institute and Boston  University  Medical Center;  Executive Vice
President and Vice  Chairman of the Board,  University  Hospital;  Academic Vice
President for Health Affairs,  Boston  University;  Director,  Essex  Investment
Management  Company,  Inc.  (investment  adviser),  Health Payment Review,  Inc.
(health care  containment  software firm),  Mediplex Group,  Inc.  (nursing care
facilities firm),  Peer Review Analysis,  Inc. (health care facilities firm) and
Springer-Verlag  New  York,  Inc.  (publisher);   Honorary  Trustee,  Franciscan
Children's Hospital and Trustee of all of the Pioneer mutual funds.
    

                                      -7-
<PAGE>

   
MARGARET B.W. GRAHAM, Trustee,  DOB:  May 1947
The Keep, P.O. Box 110. Little Deer Isle, ME  04650
         Founding  Director,  Winthrop Group, Inc (consulting  firm) since 1982;
Manager of Research  Operations,  Xerox Palo Alto Research Center,  from 1991 to
1994;  Professor of Operations  Management and Management of Technology,  Boston
University School of Management  ("BUSM"),  from 1989 to 1993 and Trustee of all
of the Pioneer mutual funds, except Pioneer Variable Contracts Trust.

JOHN W. KENDRICK, Trustee,  DOB:  July 1917
6363 Waterway Drive, Falls Church, VA  22044
         Professor Emeritus and Adjunct Scholar,  George Washington  University;
Economic  Consultant and Director,  American  Productivity  and Quality  Center;
American  Enterprise  Institute and Trustee of all of the Pioneer  mutual funds,
except Pioneer Variable Contracts Trust.

MARGUERITE A. PIRET, Trustee,  DOB:  May 1948
ne Boston Place, Suite 2635, Boston, MA 02108

         President,  Newbury,  Piret & Company, Inc. (merchant banking firm) and
Trustee of all of the Pioneer mutual funds.

DAVID D. TRIPPLE*, Trustee and Executive Vice President,  DOB:  February 1944
         Executive  Vice  President  and a  Director  of PGI;  President,  Chief
Investment  Officer and a Director of PMC;  Director of PFD, PCC,  PIC,  PIntl ,
First Russia,  Omega and Pioneer SBIC Corporation,  Executive Vice President and
Trustee of all of the Pioneer mutual funds.

STEPHEN K. WEST, Trustee,  DOB: September 1928
125 Broad Street, New York, NY  10004
         Partner,  Sullivan & Cromwell (law firm);  Trustee,  The Winthrop Focus
Funds (mutual funds) and Trustee of all of the Pioneer mutual funds.

JOHN WINTHROP, Trustee,  DOB:  June 1936
One North Adgers Wharf, Charleston, SC  29401
         President,  John  Winthrop  &  Co.,  Inc.  (private  investment  firm);
Director of NUI Corp.; Trustee of Alliance Capital Reserves, Alliance Government
Reserves  and  Alliance  Tax Exempt  Reserves  and Trustee of all of the Pioneer
mutual funds, except Pioneer Variable Contracts Trust.

WILLIAM H. KEOUGH, Treasurer,  DOB:  April 1937
         Senior Vice President,  Chief  Financial  Officer and Treasurer of PGI;
Treasurer of PFD, PMC, PSC, PCC, PIC, PIntl,  PMT, PGL, First Russia,  Omega and
Pioneer SBIC Corporation;  Treasurer and Director of PPC and Treasurer of all of
the Pioneer mutual funds.

JOSEPH P. BARRI, Secretary, DOB: August 1946
         Secretary of PGI, PMC, PPC, PIC,  PIntl,  PMT, First Russia,  Omega and
PCC;  Clerk of PFD and PSC;  Partner,  Hale and Dorr  (counsel to the Trust) and
Secretary of all of the Pioneer mutual funds.

ERIC W. RECKARD, Assistant Treasurer, DOB:  June 1956
         Manager of Fund Accounting of PMC since May 1994,  Manager of Auditing,
Compliance  and  Business  Analysis  for PGI  prior to May  1994  and  Assistant
Treasurer of all of the Pioneer mutual funds.
    

                                      -8-
<PAGE>

   
ROBERT P. NAULT, Assistant Secretary, DOB:   March 1964
         General  Counsel and Assistant  Secretary of PGI since 1995;  Assistant
Secretary of PMC, PIntl, PGL, First Russia,  Omega and all of the Pioneer mutual
funds;  Assistant  Clerk of PFD and PSC: and .formerly of Hale and Dorr (counsel
to the Trust) where he most recently served as junior partner.

RICHARD A. SCHLANGER, Vice President,  DOB:  July 1948
         Vice President of PMC.

The Trust's  Declaration of Trust provides that the holders of two-thirds of its
outstanding  shares may vote to remove a Trustee of the Trust at any  meeting of
shareholders.  See  "Description of Shares" below.  The business  address of all
officers is 60 State Street, Boston, Massachusetts 02109.

All of the outstanding  capital stock of PFD, PMC and PSC is owned,  directly or
indirectly,  by PGI, a  publicly-owned  Delaware  corporation.  PMC, the Trust's
investment  adviser,  serves as the  investment  adviser for the Pioneer  mutual
funds  listed  below  and  manages  the  investments  of  certain  institutional
accounts.
    

The table below  lists all the Pioneer  mutual  funds  currently  offered to the
public and the investment adviser and principal underwriter for each fund.

                                              Investment        Principal
Fund Name                                       Adviser        Underwriter

   
Pioneer International Growth Fund                 PMC              PFD
Pioneer Europe Fund                               PMC              PFD
Pioneer Emerging Markets Fund                     PMC              PFD
Pioneer India Fund                                PMC              PFD
Pioneer Capital Growth Fund                       PMC              PFD
Pioneer Mid-Cap Fund                              PMC              PFD
Pioneer Growth Shares                             PMC              PFD
Pioneer Small Company Fund                        PMC              PFD
Pioneer Gold Shares                               PMC              PFD
Pioneer Equity-Income Fund                        PMC              PFD
Pioneer Fund                                      PMC              PFD
Pioneer II                                        PMC              PFD
Pioneer Real Estate Shares                        PMC              PFD
Pioneer Short-Term Income Trust                   PMC              PFD
Pioneer America Income Trust                      PMC              PFD
Pioneer Bond Fund                                 PMC              PFD
Pioneer Income Fund                               PMC              PFD
Pioneer Intermediate Tax-Free Fund                PMC              PFD
Pioneer Tax-Free Income Fund                      PMC              PFD
Pioneer New York Triple Tax-Free Fund             PMC              PFD
Pioneer Massachusetts Double Tax-Free Fund        PMC              PFD
Pioneer California Double Tax-Free Fund           PMC              PFD
    


                                      -9-
<PAGE>

   
Pioneer U.S. Government Money Fund                PMC              PFD
Pioneer Cash Reserves Fund                        PMC              PFD
Pioneer Interest Shares, Inc.                     PMC              Note 1
Pioneer Variable Contracts Trust                  PMC              Note 2

Note 1   This fund is a closed-end fund.

Note 2   This is a series  of eight  separate  portfolios  designed  to  provide
         investment   vehicles  for  the  variable  annuity  and  variable  life
         insurance  contracts  of various  insurance  companies  or for  certain
         qualified pension plans.
    

         The  Trust's   Declaration  of  Trust  provides  that  the  holders  of
two-thirds of its  outstanding  shares may vote to remove a Trustee of the Trust
at any meeting of shareholders.  See "Description of Shares" below. The business
address of all officers is 60 State Street, Boston, Massachusetts 02109.

   
         At  February  29,  1996,   the  Trustees  and  officers  of  the  Trust
beneficially owned, in the aggregate,  less than 1% of the outstanding shares of
the Trust. At February 29, 1996,  Merrill Lynch Pierce Fenner & Smith,  Inc. and
Donaldson  Lufkin Jenrette  Securities  Corporation,  4800 Deer Lake Drive East,
Jacksonville,  Florida, owned of record, respectively,  1,202,705 Class A shares
(8.78% of the Class A shares outstanding), and 197,975 Class B shares (21.50% of
the Class B shares  outstanding)  of the Trust.  At  February  29,  1996,  First
Alabama Bank as Custodian  for John A. Gorham IRA,  Box 5126,  Glencoe,  Alabama
owned of record  52,083  shares of the Class B shares of the Trust (5.65% of the
Class B shares  outstanding).  To the  knowledge  of the  Trust,  no  individual
officer or Trustee of the Trust  owned 5% or more of the issued and  outstanding
shares of PGI on the date of the  Prospectus,  except  Mr.  Cogan who then owned
approximately 15% of such shares.

         Commencing on December 1, 1995, the Trust will pay an annual  trustees'
fee to each Trustee who is not  affiliated  with PGI, PMC, PFD or PSC consisting
of two components:  (a) a base fee of $500 and (b) a variable fee, calculated on
the  basis  of  the  average  net  assets  of  each  series,   estimated  to  be
approximately $60 for 1996. In addition, the Trust will pay a per meeting fee of
$120 to each Trustee who is not affiliated  with PGI, PMC, PFD or PSC. The Trust
also will pay an annual committee  participation  fee to each Trustee who serves
as a member of any committees established to act on behalf of one or more of the
of Pioneer  mutual funds.  Committee  fees will be allocated to the Trust on the
basis of the Trust's  average net  assets.  Each  Trustee who is a member of the
Audit Committee for the Pioneer mutual funds will receive an annual fee equal to
10% of the aggregate  annual  trustees' fee, except the Committee Chair who will
receive an annual  trustees' fee equal to 20% of the aggregate  annual trustees'
fee. The 1996 fees for the Audit Committee  members and Chair are expected to be
approximately $6,000 and $12,000, respectively. Members of the Pricing Committee
for the Pioneer  mutual  funds,  as well as any other  committee  which  renders
material  functional  services to the Board of Trustees  for the Pioneer  mutual
funds,  will  receive  an annual fee equal to 5% of the  annual  trustees'  fee,
except the Committee Chair who will receive an annual trustees' fee equal to 10%
of the annual trustees' fee. The 1996 fees for the Pricing Committee members and
Chair are expected to be approximately $3,000 and $6,000, respectively. Any such
fees paid to  affiliates  or  interested  persons  of PGI,  PMC,  PFD or PSC are
reimbursed  to the  Trust  under its  Management  Contract.  The  Trust  pays no
salaries of compensation to any of its officers.
    

                                      -10-
<PAGE>

   
         For the fiscal year ended November 30, 1995, the Trust paid no salaries
or compensation to any of its officers.  The Trust paid an annual  trustees' fee
of $500 to each Trustee who was not affiliated  with PMC, PFD or PSC and paid an
annual trustees' fee of $500 plus expenses to each Trustee  affiliated with PMC,
PFD or PSC.
    
<TABLE>
<CAPTION>

                                                                             Total Compensa-
                                                                              tion from the
                                                    Pension or               Trust and other
                             Aggregate              Retirement                funds in the
                           Compensation              Benefits                Pioneer Family
TrusteeFrom the Trust         Accrued            of Mutual Funds**

<S>                             <C>                      <C>                    <C>     
   
John F. Cogan, Jr.              $  500*                  $0                     $11,000*
Richard H. Egdahl, M.D.          1,000                    0                      63,315
Margaret B.W. Graham             1,000                    0                      62,398
John W. Kendrick                 1,000                    0                      62,398
Marguerite A. Piret              1,254                    0                      76,704
David D. Tripple                   500*                   0                      11,000*
Stephen K. West                  1,172                    0                      68,180
John Winthrop                    1,260                    0                      71,199
                                -------------------------------------------------------
    

  Totals                        $7,632                   $0                    $426,694
                                =========================                      ========

</TABLE>


- --------

*    PMC fully reimbursed the Trust and the other funds in the Pioneer Family of
     Mutual Funds for compensation paid to Messrs. Cogan and Tripple.

   
**   For the calendar year ended December 31, 1995.
    

         Any fees and expenses paid to affiliates or interested  persons of PMC,
PFD or PSC are reimbursed to the Trust under its Management Contract.

3.       INVESTMENT ADVISER

         The  Trust  has   contracted   with  PMC,  60  State  Street,   Boston,
Massachusetts,  to act as its investment adviser.  PMC assists in the management
of the Trust and is authorized in its discretion to buy and sell  securities for
the  account  of the  Trust,  subject to the right of the  Trust's  trustees  to
disapprove any such purchase or sale. A description of the services  provided to
the Trust under the management contract and the expenses paid by the Trust under
the contract is set forth in the Prospectus under the caption "Management of the
Trust."

         The management  contract expires initially on April 30, 1994, but it is
renewable  annually  after such date by the vote of a  majority  of the Board of
Trustees of the Trust (including a majority of the Board of Trustees who are not
parties to the  contract  or  interested  persons of any such  parties)  cast in
person at a meeting  called  for the  purpose  of voting on such  renewal.  This
contract  terminates if assigned and may be terminated without penalty by either
party, by the giving of sixty days' written notice.

         As compensation for its management services and expenses incurred,  PMC
is entitled to a management fee at the rate of 0.50% per annum on the first $100
million;  0.45% on the next $200 


                                      -11-
<PAGE>

million;  and 0.40% on assets over $300  million.  The fee is normally  computed
daily and paid monthly.

         Effective December 1, 1993, PMC agreed not to impose its management fee
to the extent  necessary  to limit the Trust's  expenses to 0.85% of its average
daily net assets.  This  agreement is voluntary and temporary and may be revised
or terminated at any time.

   
         During the fiscal years ended  November 30,  1995,  1994 and 1993,  PMC
would  have  earned   management  fees  of  $291,294,   $337,731  and  $156,492,
respectively, if a voluntary expense limitation had not been in effect. However,
pursuant to the expense  limitation  agreement  described above, PMC reduced its
management fees during the fiscal year ended November 30, 1994 by $235,347, and,
PMC voluntarily agreed not to impose any management fees during the fiscal years
ended November 30, 1995 and 1993.
    

4.       UNDERWRITING AGREEMENT AND DISTRIBUTION PLANS

         The Trust has entered  into an  Underwriting  Agreement  with PFD.  The
Underwriting Agreement provides that PFD will bear any distribution expenses not
borne by the Trust.

         PFD  bears all  expenses  it incurs  in  providing  services  under the
Underwriting Agreement.  Such expenses include compensation to its employees and
representatives  and to securities  dealers for  distribution  related  services
performed for the Trust.  PFD also pays certain  expenses in connection with the
distribution  of the Trust's shares,  including the cost of preparing,  printing
and distributing  advertising or promotional materials, and the cost of printing
and distributing prospectuses and supplements to prospective  shareholders.  The
Trust bears the cost of registering its shares under federal,  state and foreign
securities law.

         The Trust and PFD have agreed to indemnify  each other against  certain
liabilities, including liabilities under the Securities Act of 1933, as amended.
Under the  Underwriting  Agreement,  PFD will use its best  efforts in rendering
services to the Trust.

         The Trust has  adopted a plan of  distribution  pursuant  to Rule 12b-1
under the 1940 Act with  respect  to Class A shares  (the  "Class A Plan") and a
plan of  distribution  with  respect  to  Class B  shares  (the  "Class B Plan")
(together, the "Plans").

         Class A Plan

         Pursuant  to the  Class A Plan,  the Trust  may  reimburse  PFD for its
expenditures in financing any activity  primarily intended to result in the sale
of Trust shares.  Certain  categories of such expenditures have been approved by
the Board of Trustees  and are set forth in the  Prospectus.  See  "Distribution
Plans" in the Prospectus. The expenses of the Trust pursuant to the Class A Plan
are accrued on a fiscal year basis and may not exceed,  with  respect to Class A
shares,  the  annual  rate of 0.25% of the  Trust's  average  annual  net assets
attributable  to Class A shares.  The Plan does not provide for the carryover of
reimbursable expenses beyond twelve months from the date they are incurred.

         Class B Plan

         The Class B Plan  provides that the Trust shall pay PFD, as the Trust's
distributor for its Class B shares, a daily  distribution fee equal on an annual
basis to 0.75% of the Trust's  average


                                      -12-
<PAGE>

daily net assets  attributable  to Class B shares and will pay PFD a service fee
equal to 0.25% of the Trust's  average daily net assets  attributable to Class B
shares  (which PFD will in turn pay to  securities  dealers  which  enter into a
sales  agreement with PFD at a rate of up to 0.25% of the Trust's  average daily
net  assets  attributable  to Class B shares  owned by  investors  for whom that
securities  dealer  is the  holder or dealer of  record).  This  service  fee is
intended to be consideration  for personal  services and/or account  maintenance
services rendered by the dealer with respect to Class B shares. PFD will advance
to dealers  the first-  year  service fee at a rate equal to 0.25% of the amount
invested. As compensation therefore,  PFD may retain the service fee paid by the
Trust with  respect to such  shares for the first year after  purchase.  Dealers
will become  eligible  for  additional  service fees with respect to such shares
commencing in the thirteenth month following purchase.  Dealers may from time to
time be  required to meet  certain  other  criteria in order to receive  service
fees.  PFD or its  affiliates  are  entitled to retain all service  fees payable
under  the  Class B Plan for  which  there is no  dealer  of record or for which
qualification  standards have not been met as partial consideration for personal
services and/or account maintenance  services performed by PFD or its affiliates
for shareholder accounts.

         The purpose of  distribution  payments to PFD under the Class B Plan is
to  compensate  PFD  for  its  distribution  services  to the  Trust.  PFD  pays
commissions to dealers as well as expenses of printing  prospectuses and reports
used for sales  purposes,  expenses with respect to the preparation and printing
of sales literature and other distribution related expenses,  including, without
limitation,  the cost  necessary to provide  distribution-  related  services or
personnel, travel, office expenses and equipment. The Class B Plan also provides
that  PFD  will  receive  all  CDSC's  attributable  to  Class  B  shares.  (See
"Distribution Plans" in the Prospectus.)

         General

         In  accordance  with the terms of the Plans,  PFD provides to the Trust
for review by the Trustees a quarterly  written  report of the amounts  expended
under the respective Plan and the purpose for which such expenditures were made.
In the Trustees' quarterly review of the Plans, they will consider the continued
appropriateness  and the  level  of  reimbursement  or  compensation  the  Plans
provide.

         No interested  person of the Trust, nor any Trustee of the Trust who is
not an interested person of the Trust, has any direct financial  interest in the
operation  of the  Plans  except  to the  extent  that  PFD and  certain  of its
employees  may be deemed to have such an  interest  as a result of  receiving  a
portion of the amounts  expended  under the Plans by the Trust and except to the
extent certain officers may have an interest in PFD's ultimate parent, PGI.

         The Plans were  adopted by a  majority  vote of the Board of  Trustees,
including  all of the Trustees who are not, and were not at the time they voted,
interested persons of the Trust, as defined in the 1940 Act (none of whom had or
have any direct or indirect  financial  interest in the operation of the Plans),
cast in person at a meeting  called for the  purpose of voting on the Plans.  In
approving  the  Plans,  the  Trustees  identified  and  considered  a number  of
potential  benefits which the Plans may provide.  The Board of Trustees believes
that there is a reasonable  likelihood that the Plans will benefit the Trust and
its current and future  shareholders.  Under their  terms,  the Plans  remain in
effect from year to year provided such continuance is approved  annually by vote
of the Trustees in the manner  described 


                                      -13-
<PAGE>

above. The Plans may not be amended to increase materially the annual percentage
limitation  of average net assets which may be spent for the services  described
therein without approval of the shareholders of the Trust affected thereby,  and
material  amendments  of the Plans must also be approved by the  Trustees in the
manner described above. A Plan may be terminated at any time, without payment of
any penalty,  by vote of the  majority of the  Trustees  who are not  interested
persons of the Trust and have no direct or  indirect  financial  interest in the
operation  of the Plan,  or by a vote of a majority  of the  outstanding  voting
securities (as defined in the 1940 Act) of the respective  class of the Trust. A
Plan will automatically  terminate in the event of its assignment (as defined in
the 1940 Act).

         During the fiscal year ended  November  30,  1995,  the Trust  incurred
total  distribution  fees  pursuant to the Class A and Class B Plans of $138,238
and $30,305,  respectively.  Distribution  fees were paid by the Trust to PFD in
reimbursement of expenses related to compensating dealers and sales personnel.

   
         During the fiscal  year  ended  November  30,  1995,  CDSCs,  at a rate
declining from a maximum of 2.0% of the lower of the cost or market value of the
shares being redeemed,  of $11,523 were charged to redemptions of Class B shares
made within 3 years of purchase (as  described in How to Buy Trust Shares in the
Prospectus).  Such CDSCs are paid to PFD in reimbursement of expenses related to
servicing of shareholders  accounts and  compensation  paid to dealers and sales
personnel.
    

5.       SHAREHOLDER SERVICING/TRANSFER AGENT

         The  Trust  has   contracted   with  PSC,  60  State  Street,   Boston,
Massachusetts,  to act as shareholder servicing agent and transfer agent for the
Trust.  This  contract  terminates  if assigned  and may be  terminated  without
penalty  by either  party by vote of its Board of  Directors  or  Trustees  or a
majority of its  outstanding  voting  securities  and the giving of ninety days'
written notice.

         Under  the  terms of its  contract  with the  Trust,  PSC will  service
shareholder  accounts,  and its  duties  will  include:  (i)  processing  sales,
redemptions and exchanges of shares of the Trust;  (ii)  distributing  dividends
and  capital  gains  associated  with  Trust  portfolio   accounts;   and  (iii)
maintaining account records and responding to routine shareholder inquiries.

   
         PSC  receives  an  annual  fee  of  $30.00  per  Class  A and  Class  B
shareholder  account from the Trust as compensation  for the services  described
above.  This fee is set at an amount  determined  by vote of a  majority  of the
Trustees  (including  a  majority  of the  Trustees  who are not  parties to the
contract with PSC or interested persons of any such parties) to be comparable to
fees for such services being paid by other investment companies.
    

6.       CUSTODIAN

         Brown  Brothers  Harriman  (the  "Custodian")  is the  custodian of the
Trust's  assets.  The  Custodian's   responsibilities  include  safekeeping  and
controlling the Trust's cash and  securities,  handling the receipt and delivery
of securities, and collecting interest and dividends on the Trust's investments.
The Custodian does not determine the investment  policies of the Trust or decide
which securities the Trust will buy or sell. The Trust may,  however,  invest in
securities,  including  repurchase  agreements,  issued by the Custodian and may
deal with the  Custodian  as  principal in  securities  transactions.  Portfolio
securities may be deposited into the Federal  Reserve-Treasury  Department  Book
Entry System or the Depository Trust Company.

                                      -14-
<PAGE>

7.       PRINCIPAL UNDERWRITER

         PFD, 60 State Street,  Boston,  Massachusetts,  serves as the principal
underwriter  for the Trust in  connection  with the  continuous  offering of its
shares.

         The Trust will not generally issue Trust shares for consideration other
than cash. At the Trust's sole  discretion,  however,  it may issue Trust shares
for consideration other than cash in connection with an acquisition of portfolio
securities  (other than  municipal  debt  securities  issued by state  political
subdivisions or their agencies or  instrumentalities) or pursuant to a bona fide
purchase of assets,  merger or other reorganization  provided (i) the securities
meet the investment  objectives  and policies of the Trust;  (ii) the securities
are  acquired  by the  Trust  for  investment  and not  for  resale;  (iii)  the
securities  are not  restricted  as to transfer  either by law or  liquidity  of
market; and (iv) the securities have a value which is readily ascertainable (and
not established only by evaluation  procedures) as evidenced by a listing on the
American  Stock  Exchange or the New York Stock  Exchange or by quotation on the
NASD Automated Quotation System. An exchange of securities for Trust shares will
generally be a taxable transaction to the shareholder.

         The Trust has  elected to be  governed by Rule 18f-1 under the 1940 Act
pursuant to which the Trust is obligated to redeem  shares  solely in cash up to
the lesser of $250,000  or 1% of the  Trust's net asset value  during any 90-day
period for any one shareholder.

   
         During the fiscal years ended  November 30,  1995,  1994 and 1993,  net
underwriting  commissions earned by PFD in connection with its offering of Trust
shares  were   approximately   $24,247,   $49,173  and  $79,000,   respectively.
Commissions  reallowed to dealers by PFD in the same periods were  approximately
$107,008, $257,537 and $538,000, respectively.
    

8.       INDEPENDENT PUBLIC ACCOUNTANTS

         Arthur  Andersen  LLP is the  Trust's  independent  public  accountant,
providing audit  services,  tax return review,  and assistance and  consultation
with  respect to the  preparation  of filings with the  Securities  and Exchange
Commission.

9.       PORTFOLIO TRANSACTIONS

         The Trust  intends to fully manage its  portfolio by buying and selling
securities,  as  well  as  holding  securities  to  maturity.  In  managing  its
portfolio,  the Trust seeks to take advantage of market  developments  and yield
disparities, which may include use of the following strategies:

          (1) shortening the average  maturity of its portfolio in  anticipation
     of a rise in interest rates so as to minimize depreciation of principal;

          (2) lengthening the average  maturity of its portfolio in anticipation
     of a decline in interest rates so as to maximize yield;

          (3)  selling  one  type of  debt  security  and  buying  another  when
     disparities arise in the relative values of each; and

          (4) changing  from one debt  security to an  essentially  similar debt
     security  when  their  respective  yields  appear  distorted  due to market
     factors.


                                      -15-
<PAGE>


         The Trust engages in portfolio trading if it believes a transaction net
of costs  (including  custodian  charges)  will help in  achieving  the  Trust's
investment objective.

         Decisions  relating  to the  purchase  and sale of  securities  for the
Trust,  the  allocation of portfolio  transactions  and, where  applicable,  the
negotiation of commission rates are made by officers of PMC.

         The primary consideration in placing portfolio security transactions is
execution  at the most  favorable  prices.  PMC has  complete  freedom as to the
markets in which and  broker-dealers  through  which it seeks this result.  Debt
securities are traded principally in the over-the-counter  market on a net basis
through  dealers  acting for their own account  and not as brokers.  The cost of
securities purchased from underwriters  includes an underwriter's  commission or
concession,  and the prices at which  securities are purchased and sold from and
to dealers include a dealer's markup or markdown. PMC attempts to negotiate with
underwriters  to decrease the  commission or  concession  for the benefit of the
Trust.  PMC  normally  seeks to deal  directly  with the primary  market  makers
unless, in its opinion, better prices are available elsewhere.

   
         Subject to the  requirement of seeking  execution at the best available
price,  securities may, as authorized by PMC's  management  contract,  be bought
from or sold to dealers who furnish  statistical  research and other information
or  services  to PMC and the  Trust,  or who sell  shares of any of the  Pioneer
mutual funds.  Brokerage and research services may include advice concerning the
value of securities;  the  advisability  of investing in,  purchasing or selling
securities;  the  availability  of  securities  or the  purchasers or sellers of
securities;  and furnishing  analyses,  manuals and reports concerning  issuers,
securities,  economic  factors and trends,  portfolio  strategy,  performance of
accounts, comparative fund statistics and credit rating service information. PMC
maintains  a listing of dealers who provide  such  services on a regular  basis.
Management  believes  that no exact  dollar  value  can be  calculated  for such
services.
    

         The   Trustees   periodically   review   PMC's   performance   of   its
responsibilities  in connection with the placement of portfolio  transactions on
behalf  of the  Trust and  review  the  dealer  spreads  paid by the Trust  over
representative  periods of time to determine if they are  reasonable in relation
to the benefits to the Trust.

   
         The Trust is managed by PMC which also serves as investment  adviser to
other  Pioneer  mutual  funds  and  certain  private  accounts  with  investment
objectives  similar  to  those  of the  Trust.  Securities  frequently  meet the
investment  objectives of the Trust, such other funds and such private accounts.
In such  cases,  the  decision  to  recommend  a purchase to one fund or account
rather than another is based on a number of factors.  The determining factors in
most cases are the amount of  securities  of the issuer  then  outstanding,  the
value of those securities and the market for them.  Other factors  considered in
the  investment  recommendations  include other  investments  which each fund or
account  presently  has  in  a  particular  industry  and  the  availability  of
investment funds in each fund or account.
    

         It is possible that at times identical  securities will be held by more
than one fund and/or account. However,  positions in the same issue may vary and
the length of time that any fund or account may choose to hold its investment in
the same issue may likewise  vary. To the extent that the Trust,  another mutual
fund in the Pioneer group or a private account managed by PMC may not be able to
acquire as large a position in such security as it desires, it may have to pay a
higher price for the security. Similarly, the Trust may not be able to obtain as
large an  execution  of an order to sell or as high a price  for any  particular
portfolio  security if PMC decides to sell on behalf


                                      -16-
<PAGE>

of another  account the same  portfolio  security at the same time. On the other
hand,  if the same  securities  are bought or sold at the same time by more than
one fund or account,  the resulting  participation in volume  transactions could
produce better  executions for the Trust or the account.  In the event more than
one account  purchases or sells the same security on a given date, the purchases
and sales will normally be made as nearly as  practicable on a pro rata basis in
proportion to the amounts desired to be purchased or sold by each.

   
         During the fiscal years ended  November 30,  1995,  1994 and 1993,  the
Trust paid no brokerage or underwriting commissions.
    

10.      TAX STATUS

   
         It is the Trust's  policy to meet the  requirements  of Subchapter M of
the Internal Revenue Code of 1986, as amended (the "Code") for  qualification as
a regulated investment company.  These requirements relate to the sources of its
income,  the  diversification of its assets, and the timing of its distributions
to shareholders. If the Trust meets all such requirements and distributes to its
shareholders, in accordance with the Code's timing requirements,  all investment
company  taxable  income and net capital  gain, if any,  which it receives,  the
Trust will be relieved of the necessity of paying federal income tax.

         Dividends from investment  company  taxable income,  which includes net
investment  income,  net  short-term  capital  gain in excess  of net  long-term
capital loss, and certain net foreign  exchange  gains,  are taxable as ordinary
income,  whether  received in cash or in additional  shares.  Dividends from net
long-term capital gain in excess of net short-term capital loss, if any, whether
received in cash or additional shares,  are taxable to the Trust's  shareholders
as long-term capital gains for federal income tax purposes without regard to the
length of time shares of the Trust have been held. The federal income tax status
of all distributions will be reported to shareholders annually.  Because none of
the Trust's  income is expected to arise from  dividends  paid by U.S.  domestic
corporations,  no part of the distributions to its U.S.  corporate  shareholders
will qualify for the dividends-received deduction for corporations.
    

         Any dividend declared by the Trust in October,  November or December as
of a record date in such a month and paid during the  following  January will be
treated for federal income tax purposes as received by  shareholders on December
31 of the calendar year in which it is declared.

         Foreign  exchange gains and losses  realized by the Trust in connection
with  certain   transactions   involving   foreign   currency-denominated   debt
securities,  forward foreign currency contracts, foreign currencies, or payables
or receivables  denominated in a foreign  currency are subject to Section 988 of
the Code, which generally causes such gains and losses to be treated as ordinary
income  and  losses  and  may  affect  the  amount,   timing  and  character  of
distributions  to  shareholders.  Any such  transactions  that are not  directly
related to the Trust's  investment in securities may increase the amount of gain
it is deemed to  recognize  from the sale of certain  investments  held for less
than 3  months,  which  gain is  limited  under the Code to less than 30% of its
annual gross income,  and may under future Treasury  regulations  produce income
not among the types of  "qualifying  income" from which the Trust must derive at
least 90% of its annual gross  income.  If the net foreign  exchange  loss for a
year were to exceed the Trust's  investment  company  taxable  income  (computed
without regard to such loss) the resulting  overall  ordinary loss for such year
would not be deductible by the Trust or its shareholders in future years.

                                      -17-
<PAGE>

         If the Trust invests in certain PIKs,  zero coupon  securities,  or, in
general,  any other  securities  with  original  issue  discount (or with market
discount if the Trust elects to include  market  discount in income  currently),
the Trust must  accrue  income on such  investments  prior to the receipt of the
corresponding  cash  payments.  However,  the Trust  must  distribute,  at least
annually,  all or  substantially  all of its net income,  including such accrued
income, to shareholders to qualify as a regulated  investment  company under the
Code and avoid Federal income and excise taxes. Therefore, the Trust may have to
dispose of its  portfolio  securities  under  disadvantageous  circumstances  to
generate cash, or may have to leverage  itself by borrowing the cash, to satisfy
distribution requirements.

   
         At the time of an investor's purchase of Trust shares, a portion of the
purchase price is often  attributable to realized or unrealized  appreciation in
the  Trust's  portfolio.   Consequently,   subsequent  distributions  from  such
appreciation  on such  shares may be taxable  to such  investor  even if the net
asset  value of the  investor's  shares  is, as a result  of the  distributions,
reduced  below the  investor's  cost for such  shares and the  distributions  in
reality represent a return of a portion of the investment.

         Redemptions  and exchanges are taxable  events.  Any loss realized upon
the  redemption or other sale of shares with a tax holding  period of six months
or less will be treated as a long-term capital loss to the extent of any amounts
treated as distributions of long-term capital gain with respect to such shares.

         In addition, if Class A shares redeemed or exchanged have been held for
less than 91 days, (1) in the case of a reinvestment at net asset value pursuant
to the  reinvestment  privilege,  the sales  charge  paid on such  shares is not
included in their tax basis under the Code,  and (2) in the case of an exchange,
all or a portion of the sales  charge  paid on such  shares is not  included  in
their  tax basis  under  the  Code,  to the  extent a sales  charge  that  would
otherwise  apply to the shares  received  is reduced  pursuant  to the  exchange
privilege.  In either case,  the portion of the sales charge not included in the
tax basis of the shares  redeemed or  surrendered  in an exchange is included in
the tax basis of the shares acquired in the reinvestment or exchange.  Losses on
certain  redemptions  may be disallowed  under "wash sale" rules in the event of
other  investments  in the Trust  (including  those made  pursuant to  automatic
dividend  reinvestment)  within a period of 61 days beginning 30 days before and
ending 30 days after a redemption or other sale of shares.

         For  federal  income  tax  purposes,  the Trust is  permitted  to carry
forward a net capital loss in any year to offset capital gains,  if any,  during
the eight years following the year of the loss. To the extent subsequent capital
gains are offset by such  losses,  they  would not result in federal  income tax
liability  to the  Trust  and  are not  expected  to be  distributed  as such to
shareholders. For the fiscal period ended November 30, 1995, the Trust had a net
capital loss  carryforward of $2,801,943 which will expire between 2000 and 2003
if not utilized.

         The Trust may be  subject to  withholding  and other  taxes  imposed by
foreign  countries  with  respect to its  investments  in those  countries.  Tax
conventions  between certain countries and the U.S. may reduce or eliminate such
taxes in some cases.  The Trust does not expect to satisfy the  requirements for
passing through to  shareholders  their pro rata shares of foreign taxes paid by
the Trust,  with the result that  shareholders  will not  include  such taxes in
their  gross  incomes (in  addition  to  dividends  and  distributions  actually
received by shareholders)  and will not be entitled to a tax deduction or credit
for such taxes on their own tax returns.
    

                                      -18-
<PAGE>

         Different  tax  treatment,   including   penalties  on  certain  excess
contributions  and  deferrals,   certain   pre-retirement  and   post-retirement
distributions,  and  certain  prohibited  transactions,  is accorded to accounts
maintained as qualified retirement plans.
Shareholders should consult their tax advisers for more information.

         The Trust is not subject to Massachusetts corporate excise or franchise
taxes. Provided that the Trust qualifies as a regulated investment company under
the Code, it will also not be required to pay any Massachusetts income tax.

   
         Federal law requires that the Trust withhold (as "backup  withholding")
31% of reportable payments, including dividends, capital gain dividends, and the
proceeds of redemptions  (including  exchanges) and  repurchases to shareholders
who have not complied with IRS  regulations.  In order to avoid this withholding
requirement, shareholders must certify on their Applications, or on separate W-9
Forms, that the Social Security Number or other Taxpayer  Identification  Number
they provide is their correct number and that they are not currently  subject to
backup withholding,  or that they are exempt from backup withholding.  The Trust
may nevertheless be required to withhold if it receives notice from the IRS or a
broker that the number provided is incorrect or backup withholding is applicable
as a result of previous underreporting of interest or dividend income.

         The  description   above  relates  only  to  U.S.  federal  income  tax
consequences  for  shareholders  who are U.S.  persons,  i.e., U.S.  citizens or
residents and U.S. domestic  corporations,  partnerships trusts or estates,  and
who are  subject to U.S.  federal  income  taxation.  The  description  does not
address the special tax rules applicable to particular types of investors,  such
as banks, insurance companies, or tax-exempt entities. Investors other than U.S.
persons may be subject to different U.S. tax treatment, including a possible 30%
U.S. non-resident alien withholding tax (or a non-resident alien withholding tax
at a lower treaty rate) on any amounts  treated as ordinary  dividends  from the
Trust and, unless an effective IRS Form W-8 or authorized substitute is on file,
to 31% backup withholding on certain other payments from the Trust. Shareholders
should  consult their own tax advisors on these matters and on state,  local and
other applicable tax laws.
    

11.      DESCRIPTION OF SHARES

         The  Trust's  Declaration  of Trust  permits  its Board of  Trustees to
authorize the issuance of an unlimited  number of full and fractional  shares of
beneficial  interest (without par value) which may be divided into such separate
series as the Trustees may  establish.  The  Trustees may  establish  additional
series of shares,  and may divide or combine the shares into a greater or lesser
number of shares without thereby changing the proportionate beneficial interests
in the Trust.  The  Declaration  of Trust  further  authorizes  the  Trustees to
classify  or  reclassify  any  series of the  shares  into one or more  classes.
Pursuant  thereto,  the Trustees have  authorized the issuance of two classes of
shares of the Trust, Class A shares and Class B shares. Each share of a class of
the Trust represents an equal proportionate  interest in the assets of the Trust
allocable to that class. Upon liquidation of the Trust, the shareholders of each
class are entitled to share pro rata in the Trust's net assets allocable to such
class available for distribution to  shareholders.  The Trust reserves the right
to create and issue  additional  series or classes of shares,  in which case the
shares of each class of a series  would  participate  equally  in the  earnings,
dividends and assets allocable to that class of the particular series.

         The  shares of the Trust are  entitled  to vote  separately  to approve
investment  advisory  agreements  or changes  in  investment  restrictions,  but
shareholders  of all series  vote  together in the  election  and  selection  of
Trustees  and  accountants.  Shares of the  Trust  vote  together  as a class on

                                      -19-
<PAGE>

matters that affect the Trust in  substantially  the same manner.  As to matters
affecting a single class, shares of such class will vote separately.

         Although  Trustees  are  not  elected  annually  by  the  shareholders,
shareholders  holding  10% or more of the  outstanding  shares  of the Trust may
cause the Trust to hold a meeting of shareholders for the purpose of voting upon
the question of the removal of one or more  trustees.  Removal shall require the
affirmative  vote of the  holders  of  two-thirds  of the  shares  of the  Trust
outstanding  and  entitled  to vote at a meeting  called  for such  purpose.  No
amendment that adversely  affects the rights of shareholders  may be made to the
Trust's  Declaration of Trust without the affirmative  vote of a majority of its
shares.  Shares have no preemptive or conversion  rights.  Shares are fully paid
and non-assessable, except as set forth below. See "Certain Liabilities."

12.      CERTAIN LIABILITIES

         As a Massachusetts  business trust, the Trust's operations are governed
by its  Declaration  of Trust dated April 30,  1992,  a copy of which is on file
with the Office of the Secretary of State of the Commonwealth of  Massachusetts.
Theoretically, shareholders of a Massachusetts business trust may, under certain
circumstances,  be held  personally  liable  for the  obligations  of the trust.
However,  the Declaration of Trust contains an express disclaimer of shareholder
liability  for acts or  obligations  of the Trust or any series of the Trust and
provides that notice of such disclaimer be given in each  agreement,  obligation
or instrument  entered into or executed by the Trust or its Trustees.  Moreover,
the Declaration of Trust provides for the  indemnification out of Trust property
of any shareholders  held personally  liable for any obligations of the Trust or
any series of the Trust.  The  Declaration of Trust also provides that the Trust
shall,  upon  request,  assume  the  defense  of  any  claim  made  against  any
shareholder  for any act or  obligation  of the Trust and satisfy  any  judgment
thereon.  Thus, the risk of a shareholder incurring financial loss beyond his or
her   investment   because  of  shareholder   liability   would  be  limited  to
circumstances  in which the Trust itself will be unable to meet its obligations.
In light of the nature of the Trust's  business and the nature and amount of its
assets,  the possibility of the Trust's  liabilities  exceeding its assets,  and
therefore a shareholder's risk of personal liability, is remote.

         The  Declaration  of  Trust  further  provides  that  the  Trust  shall
indemnify  each of its Trustees and officers  against  liabilities  and expenses
reasonably  incurred by them, in connection with, or arising out of, any action,
suit or proceeding,  threatened  against or otherwise  involving such Trustee or
officer,  directly or indirectly, by reason of being or having been a Trustee or
officer of the Trust.  The  Declaration of Trust does not authorize the Trust to
indemnify any Trustee or officer  against any liability to which he or she would
otherwise be subject by reason of or for willful  misfeasance,  bad faith, gross
negligence or reckless disregard of such person's duties.

13.      DETERMINATION OF NET ASSET VALUE

         The net asset value per share of each class of the Trust is  determined
as of the close of regular trading  (currently 4:00 p.m.,  Eastern Time) on each
day on which the New York Stock Exchange is open for trading.  As of the date of
this  Statement of Additional  Information,  the New York Stock Exchange is open
for trading every weekday  except for the  following  holidays:  New Year's Day,
Presidents'  Day,  Good  Friday,  Memorial  Day,  Independence  Day,  Labor Day,
Thanksgiving  Day and Christmas Day. The net asset value per share of each class
of the Trust is also  determined  on any other day in which the level of trading
in its portfolio  securities is


                                      -20-
<PAGE>

sufficiently  high so that the  current  net  asset  value  per  share  might be
materially  affected by changes in the value of its  portfolio  securities.  The
Trust is not required to  determine  its net asset value per share on any day in
which no purchase  orders for the shares of the Trust  become  effective  and no
shares are tendered for redemption.

         The net asset  value per share of each class the Trust is  computed  by
taking the value of all of its assets, less the Trust's liabilities attributable
to the class, and dividing it by the number of outstanding  shares of the class.
For purposes of determining  net asset value,  expenses of the Trust are accrued
daily.

         The Board of Trustees  has  directed  that the fair market value of the
Trust's assets should be determined as follows. Ordinarily,  investments in debt
securities are valued on the basis of information furnished by a pricing service
which  utilizes  primarily  a matrix  system  (which  reflects  such  factors as
security  prices,  yields,  maturities and ratings),  supplemented by dealer and
exchange  quotations,  to recommend  valuations  for normal  institutional-sized
trading units of debt securities. In addition, the Board has instructed advisory
personnel  not to rely  exclusively  on this pricing  service if the fair market
value of certain  securities may be more  accurately  determined on the basis of
information available from other sources.  Temporary cash investments are valued
at cost, which approximates market value.

         The Trust's  maximum  offering price per Class A share is determined by
adding the maximum sales charge to the net asset value per Class A share.  Class
B shares are offered at net asset value  without  the  imposition  of an initial
sales charge.

14.      SYSTEMATIC WITHDRAWAL PLAN

         The  Systematic  Withdrawal  Plan  ("SWP")  is  designed  to  provide a
convenient  method of receiving fixed payments at regular intervals from Class A
shares of the Trust  deposited by the  applicant  under this SWP. The  applicant
must deposit or purchase for deposit with PSC Class A shares of the Trust having
a total value of not less than $10,000.  Periodic  checks of $50 or more will be
sent to the applicant,  or any person designated by him, monthly or quarterly. A
designation of a third party to receive checks requires an acceptable  signature
guarantee.  Withdrawals  from Class B share  accounts  are limited to 10% of the
value of the account at the time the SWP is implemented.

         Any income dividends or capital gains distributions on shares under the
SWP  will be  credited  to the  SWP  account  on the  payment  date in full  and
fractional shares at the net asset value per share in effect on the record date.

         SWP  payments are made from the  proceeds of the  redemption  of shares
deposited  under  the  SWP  in a SWP  account.  Share  redemptions  are  taxable
transactions to  shareholders.  To the extent that such redemptions for periodic
withdrawals  exceed  dividend  income  reinvested  in  the  SWP  account,   such
redemptions  will  reduce  and may  ultimately  exhaust  the  number  of  shares
deposited in the SWP account. In addition, the amounts received by a shareholder
cannot  be  considered  as an actual  yield or  income on his or her  investment
because part of such payments may be a return of his or her investment.

                                      -21-
<PAGE>

         The SWP may be terminated  at any time (1) by written  notice to PSC or
from PSC to the shareholder;  (2) upon receipt by PSC of appropriate evidence of
the  shareholder's  death;  or (3)  when all  shares  under  the SWP  have  been
redeemed. The fees of PSC for maintaining SWPs are paid by the Trust.

15.      LETTER OF INTENTION

         Purchases  of  $50,000  or  over  of  Class  A  shares  (excluding  any
reinvestments  of  dividends  and  capital  gains  distributions)  made within a
13-month period  pursuant to a Letter of Intention  provided by PFD will qualify
for a reduced  sales  charge.  Such reduced sales charge will be the charge that
would be applicable to the purchase of all Class A shares  purchased during such
13-month period pursuant to a Letter of Intention had such shares been purchased
all at once.  See "How to Buy Trust Shares" in the  Prospectus.  For example,  a
person who signs a Letter of Intention providing for a total investment in Trust
shares of  $50,000  over a  13-month  period  would be charged at the 2.0% sales
charge rate with respect to all purchases during that period.  Should the amount
actually  purchased  during  the  13-month  period  be more or  less  than  that
indicated  in the Letter,  an  adjustment  in the sales  charge will be made.  A
purchase not made pursuant to a Letter of Intention  may be included  thereafter
if the Letter is filed within 90 days of such purchase. Any shareholder may also
obtain the reduced  sales  charge by  including  the value (at current  offering
price) of all shares of record held in the Trust and other Pioneer  mutual funds
as of the date of the Letter of Intention  as a credit  toward  determining  the
applicable  scale of sales charge for the Class A shares to be  purchased  under
the Letter of Intention.

         The  Letter  of  Intention  authorizes  PSC to escrow  shares  having a
purchase price equal to 5% of the stated  investment in the Letter of Intention.
A Letter of Intention is not a binding obligation upon the investor to purchase,
or the Trust to sell, the full amount indicated and the investor should read the
provisions  of the Letter of  Intention  contained  in the  Account  Application
carefully before signing.

16.      INVESTMENT RESULTS

         The Trust's yield quotations and average annual total return quotations
as they may appear in the Prospectus,  this Statement of Additional  Information
or in advertising are calculated by standard methods prescribed by the SEC.

         Quotations, Comparisons, and General Information

         From  time to  time,  in  advertisements,  in sales  literature,  or in
reports to  shareholders,  the past  performance of the Trust may be illustrated
and/or  compared  with  that of  other  mutual  funds  with  similar  investment
objectives,  and to other relevant indices.  For example,  the Trust may compare
its yield to the Shearson Lehman Hutton Government  Index, U.S.  Government bond
rates, or other comparable indices or investment vehicles.

         In  addition,  the  performance  of the  classes  of the  Trust  may be
compared to  alternative  investment  or savings  vehicles  and/or to indices or
indicators of economic activity,  e.g., inflation or interest rates. Performance
rankings and listings  reported in newspapers or national business and financial
publications,  such  as  Barron's,  Business  Week,  Consumer  Digest,  Consumer
Reports, Financial World, Forbes, Fortune, Investors Business Daily, Kiplinger's
Personal Finance Magazine,  Money Magazine,  New York Times,  Personal Investor,
Smart Money, USA Today, U.S. News and World Report, The Wall Street Journal, and
Worth may also be cited (if the


                                      -22-
<PAGE>

Trust is  listed in any such  publication)  or used for  comparison,  as well as
performance listings and rankings from various other sources including Bloomberg
Financial Markets, CDA Wiesenberger,  Donoghue's Mutual Fund Almanac, Investment
Company Data, Inc., Ibbotson Associates, Johnson's Charts, Kanon Block Carre and
Co., Lipper  Analytical  Services,  Inc.,  Micropal,  Inc.,  Morningstar,  Inc.,
Schabacker Investment Management and Tower Data Systems, Inc.

         In addition,  from time to time quotations from articles from financial
publications such as those listed above may be used in advertisements,  in sales
literature, or in reports to shareholders of the Trust.

         One of the primary  methods used to measure the  performance of a class
of the Trust is "total  return."  "Total  return" will  normally  represent  the
percentage change in value of an account, or of a hypothetical investment in the
class,  over  any  period  up  to  the  lifetime  of  the  class.  Total  return
calculations  will usually assume the  reinvestment of all dividends and capital
gains  distributions and will be expressed as a percentage  increase or decrease
from an  initial  value,  for the  entire  period  or for one or more  specified
periods within the entire period.  Total return  percentages for periods of less
than one year will not  usually be  annualized;  total  return  percentages  for
periods  longer  than one year  will  usually  be  accompanied  by total  return
percentages  for each  year  within  the  period  and/or by the  average  annual
compounded total return for the period.  The income and capital  components of a
given  return may be  separated  and  portrayed in a variety of ways in order to
illustrate  their relative  significance.  Performance  may also be portrayed in
terms of cash or  investment  values,  without  percentages  or by  reference to
historical  information  depicting  the value of a  hypothetical  account in the
Trust  since the  Trust's  inception.  Past  performance  cannot  guarantee  any
particular future result.

         In  representing  investment  results  of a class,  the  Trust may also
include  references to certain  financial  planning  concepts,  including (a) an
investor's  need to evaluate his financial  assets and  obligations to determine
how  much to  invest;  (b)  his  need  to  analyze  the  objectives  of  various
investments to determine  where to invest;  and (c) his need to analyze his time
frame for future  capital  needs to determine  how long to invest.  The investor
controls  these three  factors,  all of which affect the use of  investments  in
building assets.

         Standardized Yield Quotations

         The yield of a class is computed by dividing the class's net investment
income per share during a base period of 30 days,  or one month,  by the maximum
offering  price per  share of the  class on the last day of such base  period in
accordance with the following formula:

                                             a-b
                           YIELD = 2[ ( ----- +1)6-1]
                                             cd

Where:            a        =        interest earned during the period

                  b        =        net expenses accrued for the period

                  c        =        the   average   daily   number   of   shares
                                    outstanding  during  the  period  that  were
                                    entitled to receive dividends

                  d        =        the maximum  offering price per share on the
                                    last day of the period

                                      -23-
<PAGE>

         For purposes of  calculating  interest  earned on debt  obligations  as
provided in item "a" above:


         (i)The  yield  to  maturity  of each  obligation  held by the  Trust is
computed based on the market value of the obligation  (including  actual accrued
interest,  if any) at the close of  business  each day during  the  30-day  base
period, or, with respect to obligations purchased during the month, the purchase
price (plus  actual  accrued  interest,  if any) on  settlement  date,  and with
respect to obligations sold during the month the sale price (plus actual accrued
interest, if any) between the trade and settlement dates.


         (ii) The yield to maturity of each  obligation  is then  divided by 360
and the resulting  quotient is multiplied by the market value of the  obligation
(including actual accrued interest,  if any) to determine the interest income on
the obligation for each day. The yield to maturity  calculation has been made on
each obligation during the 30 day base period.

         (iii) Interest earned on all debt obligations  during the 30-day or one
month period is then totaled.

         (iv) The maturity of an obligation with a call provision(s) is the next
call date on which the obligation reasonably may be expected to be called or, if
none, the maturity date.

         With  respect to the  treatment  of discount and premium on mortgage or
other receivables-backed obligations which are expected to be subject to monthly
payments of principal and interest ("pay downs"), the Trust accounts for gain or
loss  attributable  to actual  monthly  pay downs as an  increase or decrease to
interest  income  during the  period.  In  addition,  the Trust may elect (i) to
amortize the discount or premium  remaining on a security,  based on the cost of
the security,  to the weighted  average  maturity  date, if such  information is
available,  or to the remaining  term of the security,  if the weighted  average
maturity date is not available,  or (ii) not to amortize the remaining  discount
or premium on a security.

   
         For purposes of  computing  yield,  interest  income is  recognized  by
accruing  1/360 of the stated  interest  rate of each  obligation in the Trust's
portfolio each day that the obligation is in the portfolio.  Expenses of a class
accrued during any base period, if any, pursuant to the respective  Distribution
Plan are included among the expenses accrued during the base period.

         The yield on Class A and  Class B shares  of the  Trust for the  30-day
period  ended  November  30,  1995  computed  as  above  was  5.58%  and  4.90%,
respectively,  except that absent expense limitations,  the yield on Class A and
Class B shares of the Fund would have been 5.25% and 4.61%, respectively.
    

         Standardized Average Annual Total Return Quotations.

         Average  annual total return  quotations for Class A and Class B shares
are computed by finding the average annual compounded rates of return that would
cause  a  hypothetical  investment  in the  class  made  on the  first  day of a
designated  period (assuming all dividends and  distributions


                                      -24-
<PAGE>

are  reinvested)  to equal  the  ending  redeemable  value of such  hypothetical
investment  on the last day of the  designated  period  in  accordance  with the
following formula:

                                    P(1+T)n =        ERV

Where:            P        =      a hypothetical initial payment of $1,000, less
                                  the  maximum  sales  load of $25  for  Class A
                                  shares or the deduction of the CDSC on Class B
                                  shares at the end of the period.

                  T        =      average annual total return

                  n        =      number of years

                  ERV      =      ending  redeemable  value of the  hypothetical
                                  $1,000  initial  payment made at the beginning
                                  of  the   designated   period  (or  fractional
                                  portion thereof)

         For purposes of the above  computation,  it is assumed that the maximum
sales  charge of 2.5% was  deducted  from the  initial  investment  and that all
dividends and distributions  made by the Trust are reinvested at net asset value
during the  designated  period.  The average  annual total  return  quotation is
determined to the nearest 1/100 of 1%.

         In determining the average annual total return  (calculated as provided
above), recurring fees, if any, that are charged to all shareholder accounts are
taken into  consideration.  For any account  fees that vary with the size of the
account,  the account fee used for purposes of the above  computation is assumed
to be the fee that would be charged to the Trust's mean account size.

   
         The average  annual total returns for period  ending  November 30, 1995
were:


                  1 Year          5 Years           10 Years         Life
                  ------          -------           --------         ----

Class A Shares    6.93%           N/A               N/A              3.97% *
Class B Shares    6.79%           N/A               N/A              4.30% **

*        Commencement of operations, August 10, 1992.
**       Class B shares first offered on April 4, 1994.


         Class A share results reflect the maximum sales charge of 5.75%.  Class
B share  results  reflect the effect of the CDSC that would have been charged if
shares  were  redeemed at the end of each  period.  If PMC's  voluntary  fee and
expense reduction  agreement had not been in place, total return would have been
lower.
    

Automated Information Line

   
         FactFoneSM,   Pioneer's  24-hour  automated  information  line,  allows
shareholders   to  dial   toll-free   1-800-225-4321   and  hear  recorded  fund
information, including:
    

         o        net asset value prices for all Pioneer mutual funds;

         o        annualized 30-day yields on Pioneer's fixed-income funds;

                                      -25-
<PAGE>

         o        annualized 7-day yields and 7-day effective  (compound) yields
                  for Pioneer's money market funds; and

         o        dividends  and  capital  gains  distributions  on all  Pioneer
                  mutual funds.

Yields are calculated in accordance with SEC mandated standard formulas.

   
         In  addition,  by  using  a  personal  identification  number  ("PIN"),
shareholders  may enter  purchases,  exchanges  and  redemptions,  access  their
account balance and last three transactions and may order a duplicate statement.
See "FactFoneSM" in the Prospectus for more information.

         All performance numbers  communicated through FactFoneSM represent past
performance;  figures for all quoted bond funds  include the maximum  applicable
sales  charge.  A  shareholder's  actual  yield and total  return will vary with
changing market conditions.  The value of Class A and Class B shares (except for
Pioneer  money  market  funds,  which seek a stable $1.00 share price) will also
vary and may be worth more or less at redemption than their original cost.
    

 17.     FINANCIAL STATEMENTS

   
         The Trust's  financial  statements for the year ended November 30, 1995
are  included in the Trust's  Annual  Report to  Shareholders,  which  report is
incorporated  by  reference  into and attached to this  Statement of  Additional
Information.  The Trust's Annual Report to Shareholders  is so incorporated  and
attached in reliance upon the report of Arthur Andersen LLP,  independent public
accountants, as experts in accounting and auditing.
    




                                      -26-
<PAGE>
   
                                   APPENDIX A

                          Description of Bond Ratings1

                        Moody's Investor's Service, Inc.2

Aaa: Bonds which are rated Aaa are judged to be of the best quality.  They carry
the smallest  degree of investment  risk and are generally  referred to as "gilt
edge." Interest payments are protected by a large or by an exceptionally  stable
margin and principal is secure. While the various protective elements are likely
to change,  such changes as can be  visualized  are most  unlikely to impair the
fundamentally strong position of such issues.

Aa: Bonds which are rated Aa are judged to be of high quality by all  standards.
Together with the Aaa group they comprise what are generally known as high grade
bonds.  They are rated lower than the best bonds  because  margins of protection
may not be as large as in Aaa securities or  fluctuation of protective  elements
may be of greater  amplitude or there may be other  elements  present which make
the long-term risks appear somewhat bigger than in Aaa securities.

A: Bonds which are rated A possess many favorable investment  attributes and are
to be considered as upper medium grade  obligations.  Factors giving security to
principal and interest are considered adequate but elements may be present which
suggest susceptibility to impairment sometime in the future.

 Baa:  Bonds which are rated Baa are  considered  as medium  grade  obligations,
i.e., they are neither highly  protected nor poorly secured.  Interest  payments
and principal  security appear  adequate for the present but certain  protective
elements may be lacking or may be  characteristically  unreliable over any great
length of time. Such bonds lack outstanding  investment  characteristics  and in
fact have speculative characteristics as well.


                         Standard & Poor's Corporation3

AAA:  Bonds rated AAA are highest grade  obligations.  This rating  indicates an
extremely strong capacity to pay principal and interest.

- --------

1        The ratings  described below are believed to be the most recent ratings
available at the date of this Prospectus for the securities listed.  Ratings are
generally given to securities at the time of issuance. While the rating agencies
may from time to time revise such  ratings,  they  undertake no obligation to do
so, and the ratings indicated do not necessarily represent ratings which will be
given to these securities on the date of the Trust's fiscal year-end.

2        Rates  bonds of issuers  which have  $600,000  or more of debt,  except
bonds of  educational  institutions,  projects under  construction,  enterprises
without established earnings records and situations where current financial data
is unavailable.

3        Rates  all  governmental  bodies  having  $1,000,000  or  more  of debt
outstanding, unless adequate information is not available.



                                      -27-
<PAGE>

AA: Bonds rated AA also  qualify as  high-quality  obligations.  Capacity to pay
principal  and  interest is very strong,  and in the majority of instances  they
differ from AAA issues only in small degree.

A: Bonds rated A have a strong capacity to pay principal and interest,  although
they are more susceptible to the adverse effects of changes in circumstances and
economic conditions.

BBB:  Bonds  rated  BBB are  regarded  as  having an  adequate  capacity  to pay
principal  and  interest.  Whereas they  normally  exhibit  adequate  protection
parameters,  adverse  economic  conditions  or changing  circumstances  are more
likely to lead to a weakened capacity to pay principal and interest for bonds in
this category than for bonds in the A category.















                                      -28-
<PAGE>

                        Pioneer Short-Term Income Trust A
<TABLE>
<CAPTION>

  Date    Initial Investment    Offering Price   Sales Charge   Shares Purchased       Net Asset Value  Initial Net Asset
                                                   Included                               Per Share           Value
<S>           <C>                  <C>              <C>            <C>                     <C>               <C>   
 8/10/92      $10,000              $4.1000          2.50%          2,439.024               $4.0000           $9,756
</TABLE>


                     Dividends and Capital Gains Reinvested

                                 Value of Shares

  Date     From Investment    From Cap. Gains     From Dividends   Total Value
                                 Reinvested         Reinvested
12/31/92       $9,659               $0                $256          $9,915
12/31/93       $9,634               $0                $863          $10,497
12/31/94       $9,122               $0               $1,395         $10,517
12/31/95       $9,390               $0               $2,190         $11,580











                                      -29-
<PAGE>


                        Pioneer Short-Term Income Trust B

<TABLE>
<CAPTION>
  Date    Initial Investment      Offering Price   Sales Charge   Shares Purchased     Net Asset Value     Initial Net Asset
                                                     Included                             Per Share              Value
<S>               <C>                <C>              <C>                <C>               <C>                  <C>    
 4/4/94           $10,000            $3.8900          4.00%              2,570.694         $3.8900              $10,000

</TABLE>

                     Dividends and Capital Gains Reinvested

                                 Value of Shares

  Date    From Investment     From Cap. Gains     From Dividends    Total Value
                                 Reinvested         Reinvested
12/31/94       $9,589             $0                $385           $9,977
12/31/95       $9,897             $0               $1,021          $10,522

















                                      -30-
<PAGE>

                                   APPENDIX B
                             COMPARATIVE PERFORMANCE
                               INDEX DESCRIPTIONS

The following  securities  indices are well-known,  unmanaged measures of market
performance. Advertisements and sales literature for the Fund may refer to these
indices or may present  comparisons  between the performance of the Fund and one
or more of the indices.  Other indices may be used, if appropriate.  The indices
are not available for direct  investment.  The data presented is not meant to be
indicative of the  performance of the Fund,  reflects past  performance and does
not guarantee future results.

S&P 500
This index is a readily available, carefully constructed,  market value weighted
benchmark  of common  stock  performance.  Currently,  the S&P  Composite  Index
includes  500 of the  largest  stocks  (in terms of stock  market  value) in the
United States; prior to March 1957 it consisted of 90 of the largest stocks.

DOW JONES INDUSTRIAL AVERAGE
This is a total return index based on the performance of 30 blue chip stocks.

U.S. SMALL STOCK INDEX
This index is a market value  weighted  index of the ninth and tenth  deciles of
the New York Stock  Exchange  (NYSE),  plus stocks listed on the American  Stock
Exchange (AMEX) and over-the-counter  (OTC) with the same or less capitalization
as the upper bound of the NYSE ninth decile.

U.S. INFLATION
The  Consumer  Price  Index  for All Urban  Consumers  (CPI-U),  not  seasonally
adjusted, is used to measure inflation,  which is the rate of change of consumer
goods prices.  Unfortunately,  the  inflation  rate as derived by the CPI is not
measured  over the same period as the other asset  returns.  All of the security
returns are measured  from one  month-end to the next  month-end.  CPI commodity
prices are collected during the month.  Thus,  measured  inflation rates lag the
other  series  by about  one-half  month.  Prior to  January  1978,  the CPI (as
compared with CPI-U) was used.  Both inflation  measures are  constructed by the
U.S. Department of Labor, Bureau of Labor Statistics, Washington, DC.

S&P/BARRA INDEXES
The S&P/BARRA Growth and Value Indexes are constructed by dividing the stocks in
the S&P 500 Index according to price-to-book  ratios.  The Growth Index contains
stocks with higher  price-to-book  ratios,  and the Value Index contains  stocks
with  lower  price-to-book   ratios.  Both  indexes  are  market  capitalization
weighted.

LONG-TERM U.S. GOVERNMENT BONDS
The  total  returns  on  long-term  government  bonds  from  1977  to  1991  are
constructed  with data from The Wall Street Journal.  Over  1926-1976,  data are
obtained  from the  Government  bond file at the Center for Research in Security
Prices (CRSP), Graduate School of Business,  University of Chicago. Each year, a
one-bond  portfolio  with a term of  approximately  20  years  and a  reasonably
current  coupon  was used,  and whose  returns  did not  reflect  potential  tax
benefits,  impaired  negotiability,  or special  redemption or call  privileges.
Where  callable  bonds had to be used,  the term of the bond was assumed to be a
simple  average of the maturity and first call dates 


                                      -31-
<PAGE>

                             COMPARATIVE PERFORMANCE
                               INDEX DESCRIPTIONS


minus the current  date.  The bond was "held" for the calendar  year and returns
were  computed.  Total returns for 1977-1991 are calculated as the change in the
flat price or and-interest price.

INTERMEDIATE-TERM U.S. GOVERNMENT BONDS
Total  returns  of the  intermediate-term  government  bonds for  1977-1991  are
calculated from The Wall Street Journal prices,  using the change in flat price.
Returns from 1934-1986 are obtained from the CRSP Government Bond File.

Each year,  one-bond  portfolios  are formed,  the bond  chosen is the  shortest
noncallable  bond with a maturity not less than 5 years, and this bond is "held"
for the  calendar  year.  Monthly  returns are  computed.  (Bonds with  impaired
negotiability or special redemption  privileges are omitted, as are partially or
fully  tax-exempt  bonds starting with 1943.) From  1934-1942,  almost all bonds
with maturities near 5 years were partially or full tax-exempt and were selected
using the rules described  above.  Personal tax rates were generally low in that
period,  so that yields on  tax-exempt  bonds were  similar to yields on taxable
bonds. From 1926-1933, there are few bonds suitable for construction of a series
with a 5-year  maturity.  For this period,  five year bond yield  estimates  are
used.

MSCI
Morgan  Stanley  Capital  International   Indices,   developed  by  the  Capital
International  S.A., are based on share prices of some 1470 companies  listed on
the stock exchanges around the world.

Countries in the MSCI EAFE Portfolio are:
Australia;  Austria;  Belgium;  Denmark;  Finland;  France;  Germany; Hong Kong;
Italy;  Japan;  Netherlands;  N.  Zealand;  Norway;  Singapore/Malaysia;  Spain;
Sweden; Switzerland; United Kingdom.

6 MONTH CDs
Data sources include the Federal Reserve Bulletin and The Wall Street Journal.

LONG-TERM U.S. CORPORATE BONDS
For  1969-1991,  corporate  bond total  returns are  represented  by the Salomon
Brothers Long-Term  High-Grade  Corporate Bond Index. Since most large corporate
bond  transactions  take place over the  counter,  a major dealer is the natural
source of these data. The index includes  nearly all Aaa- and Aa-rated bonds. If
a bond is  downgraded  during a  particular  month,  its return for the month is
included in the index before removing the bond from future portfolios.

Over  1926-1968  the total  returns  were  calculated  by  summing  the  capital
appreciation returns and the income returns. For the period 1946-1968,  Ibbotson
and Sinquefield  backdated the Salomon Brothers' index,  using Salomon Brothers'
monthly  yield  data with a  methodology  similar  to that used by  Salomon  for
1969-1991. Capital appreciation returns were calculated from yields assuming (at
the beginning of each monthly holding period) a 20-year  maturity,  a bond price
equal to par,  and a  coupon  equal to the  beginning-of-period  yield.  For the
period 1926-1945, the Standard and Poor's monthly High-Grade Corporate Composite
yield data were used,  assuming a 4 percent coupon and a 20-year  maturity.  The
conventional  present-value  formula  for  bond  price  for  the  beginning  and
end-of-month  prices was used.  (This formula is presented in Ross,  Stephen A.,
and Randolph W. Westerfield,  Corporate Finance, Times



                                      -32-
<PAGE>

                             COMPARATIVE PERFORMANCE
                               INDEX DESCRIPTIONS


Mirror/Mosby, St. Louis, 1990, p. 97 ["Level-Coupon Bonds"].) The monthly income
return was assumed to be one-twelfth the coupon.

U.S. (30 DAY) TREASURY BILLS
For the U.S. Treasury bill index, data from The Wall Street Journal are used for
1977-1991;  the CRSP U.S.  Government  Bond File is the source until 1976.  Each
month a one-bill  portfolio  containing the  shortest-term  bill having not less
than one month to maturity is constructed. (The bill's original term to maturity
is not relevant.) To measure holding period returns for the one-bill  portfolio,
the bill is priced as of the last trading day of the previous  month-end  and as
of the last trading day of the current month.

NAREIT-EQUITY INDEX
All of the  data is  based  upon the last  closing  price of the  month  for all
tax-qualified  REITs  listed  on the  NYSE,  AMSE  and the  NASDAQ.  The data is
market-value-weighted.  Prior to 1987 REITs were added to the index the  January
following  their  listing.  Since 1987 Newly formed or listed REITs are added to
the total  shares  outstanding  figure in the month that the shares are  issued.
Only  common  shares  issued by the REIT are  included  in the index.  The total
return  calculation  is based upon the weighing at the  beginning of the period.
Only  those  REITs  listed for the  entire  period are used in the total  return
calculation.  Dividends are included in the month based upon their payment date.
There is no smoothing of income. Liquidating dividends, whether full or partial,
are treated as income.

RUSSELL 2000 SMALL STOCK INDEX
Index of the 2,000 smallest  stocks in the Russell 3000 Index (TM); the smallest
company has a market capitalization of approximately $13 million.
The Russell  30000 is comprised of the 3,000  largest US companies as determined
by market capitalization representing approximately 98% of the US equity market.
The largest company in the index has a market capitalization of $67 billion. The
Russell Indexes (TM) are reconstituted  annually as of June 1st, based on May 31
market capitalization rankings.

WILSHIRE REAL ESTATE SECURITIES INDEX
The Wilshire Real Estate  Securities  Index is a market  capitalization-weighted
index which measures the performance of more than 85 securities.

The index  contains  performance  data on five  major  categories  of  property;
office, retail, industrial, apartment and miscellaneous. Additionally, the Index
has real estate portfolio encumbered by 16% third party mortgages. The companies
in the WRESEC are 79% equity  and hybrid  REIT's and 21% real  estate  operating
companies. The capitalization is 47% NYSE, 33% AMEX and 20% OTC."

STANDARD & POOR'S MIDCAP 400 INDEX
The Standard and Poor's MidCap 400 Index is a  market-value-weighted  index. The
performance  data for the MidCap 400 Index were  calculated by taking the stocks
presently in the MidCap 400 Index and tracking them backwards in time as long as
there were prices reported.  No attempt was made to determine what stocks "might
have  been" in the  MidCap  400  Index  five or ten  years  ago had it  existed.
Dividends  are  reinvested  on a monthly  basis prior to June 30, 1991,  and are
reinvested daily thereafter.



                                      -33-
<PAGE>

                             COMPARATIVE PERFORMANCE
                               INDEX DESCRIPTIONS


The S&P MidCap 400 Index and the S&P 500 together represent approximately 85% of
the total market capitalization of stocks traded in the United States.

BANK SAVINGS ACCOUNT
Data sources include the U.S. League of Savings Institutions Sourcebook; average
annual yield on savings  deposits in FSLIC [FDIC] insured  savings  institutions
for the years 1963-1987 and The Wall Street Journal for the years 1988-1994.






Source:           Ibbotson Associates











                                      -34-
<PAGE>

                  PERFORMANCE STATISTICS - TOTAL RETURN PERCENT


          S&P 500       Dow      U.S. Small                  S&P/     S&P/   
                       Jones       Stock         U.S.       BARRA    BARRA
                    Industrials    Index      Inflation    Growth    Value
Dec 1928   43.61       55.38       39.69       -0.97         N/A      N/A
Dec 1929   -8.42      -13.64      -51.36        0.20         N/A      N/A
Dec 1930  -24.90      -30.22      -38.15       -6.03         N/A      N/A
Dec 1931  -43.34      -49.03      -49.75       -9.52         N/A      N/A
Dec 1932   -8.19      -16.88       -5.39      -10.30         N/A      N/A
Dec 1933   53.99       73.71      142.87        0.51         N/A      N/A
Dec 1934   -1.44        8.07       24.22        2.03         N/A      N/A
Dec 1935   47.67       43.77       40.19        2.99         N/A      N/A
Dec 1936   33.92       30.23       64.80        1.21         N/A      N/A
Dec 1937  -35.03      -28.88      -58.01        3.10         N/A      N/A
Dec 1938   31.12       33.16       32.80       -2.78         N/A      N/A
Dec 1939   -0.41        1.31        0.35       -0.48         N/A      N/A
Dec 1940   -9.78       -7.96       -5.16        0.96         N/A      N/A
Dec 1941  -11.59       -9.88       -9.00        9.72         N/A      N/A
Dec 1942   20.34       14.12       44.51        9.29         N/A      N/A
Dec 1943   25.90       19.06       88.37        3.16         N/A      N/A
Dec 1944   19.75       17.19       53.72        2.11         N/A      N/A
Dec 1945   36.44       31.60       73.61        2.25         N/A      N/A
Dec 1946   -8.07       -4.40      -11.63       18.16         N/A      N/A
Dec 1947    5.71        7.61        0.92        9.01         N/A      N/A
Dec 1948    5.50        4.27       -2.11        2.71         N/A      N/A
Dec 1949   18.79       20.92       19.75       -1.80         N/A      N/A
Dec 1950   31.71       26.40       38.75        5.79         N/A      N/A
Dec 1951   24.02       21.77        7.80        5.87         N/A      N/A
Dec 1952   18.37       14.58        3.03        0.88         N/A      N/A
Dec 1953   -0.99        2.02       -6.49        0.62         N/A      N/A
Dec 1954   52.62       51.25       60.58       -0.50         N/A      N/A
Dec 1955   31.56       26.58       20.44        0.37         N/A      N/A
Dec 1956    6.56        7.10        4.28        2.86         N/A      N/A
Dec 1957  -10.78       -8.63      -14.57        3.02         N/A      N/A
Dec 1958   43.36       39.31       64.89        1.76         N/A      N/A
Dec 1959   11.96       20.21       16.40        1.50         N/A      N/A
Dec 1960    0.47       -6.14       -3.29        1.48         N/A      N/A
Dec 1961   26.89       22.60       32.09        0.67         N/A      N/A
Dec 1962   -8.73       -7.43      -11.90        1.22         N/A      N/A
Dec 1963   22.80       20.83       23.57        1.65         N/A      N/A
Dec 1964   16.48       18.85       23.52        1.19         N/A      N/A
Dec 1965   12.45       14.39       41.75        1.92         N/A      N/A
Dec 1966  -10.06      -15.78       -7.01        3.35         N/A      N/A
Dec 1967   23.98       19.16       83.57        3.04         N/A      N/A
Dec 1968   11.06        7.93       35.97        4.72         N/A      N/A



                                      -35-
<PAGE>

                  PERFORMANCE STATISTICS - TOTAL RETURN PERCENT


          S&P 500       Dow      U.S. Small                  S&P/     S&P/   
                       Jones       Stock         U.S.       BARRA    BARRA
                    Industrials    Index      Inflation    Growth    Value

Dec 1969   -8.50      -11.78      -25.05        6.11        N/A      N/A
Dec 1970    4.01        9.21      -17.43        5.49        N/A      N/A
Dec 1971   14.31        9.83       16.50        3.36        N/A      N/A
Dec 1972   18.98       18.48        4.43        3.41        N/A      N/A
Dec 1973  -14.66      -13.28      -30.90        8.80        N/A      N/A
Dec 1974  -26.47      -23.58      -19.95       12.20        N/A      N/A
Dec 1975   37.20       44.75       52.82        7.01       31.72    43.38
Dec 1976   23.84       22.82       57.38        4.81       13.84    34.93
Dec 1977   -7.18      -12.84       25.38        6.77      -11.82    -2.57
Dec 1978    6.56        2.79       23.46        9.03        6.78     6.16
Dec 1979   18.44       10.55       43.46       13.31       15.72    21.16
Dec 1980   32.42       22.17       39.88       12.40       39.40    23.59
Dec 1981   -4.91       -3.57       13.88        8.94       -9.81     0.02
Dec 1982   21.41       27.11       28.01        3.87       22.03    21.04
Dec 1983   22.51       25.97       39.67        3.80       16.24    28.89
Dec 1984    6.27        1.31       -6.67        3.95        2.33    10.52
Dec 1985   32.16       33.55       24.66        3.77       33.31    29.68
Dec 1986   18.47       27.10        6.85        1.13       14.50    21.67
Dec 1987    5.23        5.48       -9.30        4.41        6.50     3.68
Dec 1988   16.81       16.14       22.87        4.42       11.95    21.67
Dec 1989   31.49       32.19       10.18        4.65       36.40    26.13
Dec 1990   -3.17       -0.56      -21.56        6.11        0.20    -6.85
Dec 1991   30.55       24.19       44.63        3.06       38.37    22.56
Dec 1992    7.67        7.41       23.35        2.90        5.07    10.53
Dec 1993    9.99       16.94       20.98        2.75        1.68    18.60
Dec 1994    1.31        5.06        3.11        2.78        3.13    -0.64
Dec 1995   37.43       36.84       34.46        2.74       38.13    36.99



                                      -36-
<PAGE>

                  PERFORMANCE STATISTICS - TOTAL RETURN PERCENT



                         Intermediate      MSCI               Long-
          Long-Term       -Term U.S.       EAFE        6     Term U.S.    U.S.
          U.S. Gov't      Government     - Net of    MONTH   Corporate  (30 Day)
            Bonds           Bonds          Taxes      CDs      Bonds    T- Bill 
     
Dec 1925     N/A              N/A           N/A       N/A      N/A      N/A
Dec 1926     7.77             5.38          N/A       N/A      7.37     3.27
Dec 1927     8.93             4.52          N/A       N/A      7.44     3.12
Dec 1928     0.1              0.92          N/A       N/A      2.84     3.56
Dec 1929     3.42             6.01          N/A       N/A      3.27     4.75
Dec 1930     4.66             6.72          N/A       N/A      7.98     2.41
Dec 1931    -5.31            -2.32          N/A       N/A      -1.85    1.07
Dec 1932    16.84             8.81          N/A       N/A      10.82    0.96
Dec 1933    -0.07             1.83          N/A       N/A      10.38    0.30
Dec 1934    10.03             9.00          N/A       N/A      13.84    0.16
Dec 1935     4.98             7.01          N/A       N/A      9.61     0.17
Dec 1936     7.52             3.06          N/A       N/A      6.74     0.18
Dec 1937     0.23             1.56          N/A       N/A      2.75     0.31
Dec 1938     5.53             6.23          N/A       N/A      6.13    -0.02
Dec 1939     5.94             4.52          N/A       N/A      3.97     0.02
Dec 1940     6.09             2.96          N/A       N/A      3.39     0.00
Dec 1941     0.93             0.50          N/A       N/A      2.73     0.06
Dec 1942     3.22             1.94          N/A       N/A      2.60     0.27
Dec 1943     2.08             2.81          N/A       N/A      2.83     0.35
Dec 1944     2.81             1.80          N/A       N/A      4.73     0.33
Dec 1945    10.73             2.22          N/A       N/A      4.08     0.33
Dec 1946    -0.10             1.00          N/A       N/A      1.72     0.35
Dec 1947    -2.62             0.91          N/A       N/A     -2.34     0.50
Dec 1948     3.40             1.85          N/A       N/A      4.14     0.81 
Dec 1949     6.45             2.32          N/A       N/A      3.31     1.10
Dec 1950     0.06             0.70          N/A       N/A      2.12     1.20
Dec 1951    -3.93             0.36          N/A       N/A     -2.69     1.49
Dec 1952     1.16             1.63          N/A       N/A      3.52     1.66
Dec 1953     3.64             3.23          N/A       N/A      3.41     1.82
Dec 1954     7.19             2.68          N/A       N/A      5.39     0.86
Dec 1955    -1.29            -0.65          N/A       N/A      0.48     1.57
Dec 1956    -5.59            -0.42          N/A       N/A     -6.81     2.46
Dec 1957     7.46             7.84          N/A       N/A      8.71     3.14
Dec 1958    -6.09            -1.29          N/A       N/A     -2.22     1.54
Dec 1959    -2.26            -0.39          N/A       N/A     -0.97     2.95
Dec 1960    13.78            11.76          N/A       N/A      9.07     2.66
Dec 1961     0.97             1.85          N/A       N/A      4.82     2.13
Dec 1962     6.89             5.56          N/A       N/A      7.95     2.73
Dec 1963     1.21             1.64          N/A       N/A      2.19     3.12
Dec 1964     3.51             4.04          N/A      4.18      4.77     3.54
Dec 1965     0.71             1.02          N/A      4.68     -0.46     3.93




                                      -37-
<PAGE>

                  PERFORMANCE STATISTICS - TOTAL RETURN PERCENT


                         Intermediate      MSCI               Long-
          Long-Term       -Term U.S.       EAFE        6     Term U.S.    U.S.
          U.S. Gov't      Government     - Net of    MONTH   Corporate  (30 Day)
            Bonds           Bonds          Taxes      CDs      Bonds    T- Bill 
                                                                                
Dec 1966     3.65           4.69            N/A       5.75     0.20       4.76  
Dec 1967    -9.18           1.01            N/A       5.48    -4.95       4.21  
Dec 1968    -0.26           4.54            N/A       6.44     2.57       5.21 
Dec 1969    -5.07          -0.74            N/A       8.71    -8.09       6.58
Dec 1970    12.11          16.86          -11.66      7.06    18.37       6.52
Dec 1971    13.23           8.72           29.59      5.36    11.01       4.39
Dec 1972     5.69           5.16           36.35      5.38     7.26       3.84
Dec 1973    -1.11           4.61          -14.92      8.60     1.14       6.93
Dec 1974     4.35           5.69          -23.16     10.20    -3.06       8.00
Dec 1975     9.20           7.83           35.39      6.51    14.64       5.80
Dec 1976    16.75          12.87            2.54      5.22    18.65       5.08
Dec 1977    -0.69           1.41           18.06      6.12     1.71       5.12
Dec 1978    -1.18           3.49           32.62     10.21    -0.07       7.18
Dec 1979    -1.23           4.09            4.75     11.90    -4.18      10.38
Dec 1980    -3.95           3.91           22.58     12.33    -2.76      11.24
Dec 1981     1.86           9.45           -2.28     15.50    -1.24      14.71
Dec 1982    40.36          29.1            -1.86     12.18    42.56      10.54
Dec 1983     0.65           7.41           23.69      9.65     6.26       8.80
Dec 1984    15.48          14.02            7.38     10.65    16.86       9.85
Dec 1985    30.97          20.33           56.16      7.82    30.09       7.72
Dec 1986    24.53          15.14           69.44      6.30    19.85       6.16
Dec 1987    -2.71           2.90           24.63      6.58    -0.27       5.47
Dec 1988     9.67           6.10           28.27      8.15    10.70       6.35
Dec 1989    18.11          13.29           10.54      8.27    16.23       8.37
Dec 1990     6.18           9.73          -23.45      7.85     6.78       7.81
Dec 1991    19.3           15.46           12.13      4.95    19.89       5.60
Dec 1992     8.05           7.19          -12.17      3.27     9.39       3.51
Dec 1993    18.24          11.24           32.56      2.88    13.19       2.90
Dec 1994    -7.77          -5.14            7.78      5.40    -5.76       3.90
Dec 1995    31.67          16.8            11.21      5.21    26.39       5.60
                                                                                



                                      -38-
<PAGE>

                  PERFORMANCE STATISTICS - TOTAL RETURN PERCENT
     
                                           S & P    Bank
             NAREIT -  Russell  Wilshire   Midcap  Savings 
             Equity     2000  Real Estate   400    Account
     
Dec 1925        N/A      N/A      N/A     N/A      N/A
Dec 1926        N/A      N/A      N/A     N/A      N/A
Dec 1927        N/A      N/A      N/A     N/A      N/A
Dec 1928        N/A      N/A      N/A     N/A      N/A
Dec 1929        N/A      N/A      N/A     N/A      N/A
Dec 1930        N/A      N/A      N/A     N/A      5.30
Dec 1931        N/A      N/A      N/A     N/A      5.10
Dec 1932        N/A      N/A      N/A     N/A      4.10
Dec 1933        N/A      N/A      N/A     N/A      3.40
Dec 1934        N/A      N/A      N/A     N/A      3.50
Dec 1935        N/A      N/A      N/A     N/A      3.10
Dec 1936        N/A      N/A      N/A     N/A      3.20
Dec 1937        N/A      N/A      N/A     N/A      3.50
Dec 1938        N/A      N/A      N/A     N/A      3.50
Dec 1939        N/A      N/A      N/A     N/A      3.40
Dec 1940        N/A      N/A      N/A     N/A      3.30
Dec 1941        N/A      N/A      N/A     N/A      3.10
Dec 1942        N/A      N/A      N/A     N/A      3.00
Dec 1943        N/A      N/A      N/A     N/A      2.90
Dec 1944        N/A      N/A      N/A     N/A      2.80
Dec 1945        N/A      N/A      N/A     N/A      2.50
Dec 1946        N/A      N/A      N/A     N/A      2.20
Dec 1947        N/A      N/A      N/A     N/A      2.30
Dec 1948        N/A      N/A      N/A     N/A      2.30
Dec 1949        N/A      N/A      N/A     N/A      2.40
Dec 1950        N/A      N/A      N/A     N/A      2.50
Dec 1951        N/A      N/A      N/A     N/A      2.60
Dec 1952        N/A      N/A      N/A     N/A      2.70
Dec 1953        N/A      N/A      N/A     N/A      2.80
Dec 1954        N/A      N/A      N/A     N/A      2.90
Dec 1955        N/A      N/A      N/A     N/A      2.90
Dec 1956        N/A      N/A      N/A     N/A      3.00
Dec 1957        N/A      N/A      N/A     N/A      3.30
Dec 1958        N/A      N/A      N/A     N/A      3.38
Dec 1959        N/A      N/A      N/A     N/A      3.53
Dec 1960        N/A      N/A      N/A     N/A      3.86
Dec 1961        N/A      N/A      N/A     N/A      3.90
Dec 1962        N/A      N/A      N/A     N/A      4.08
Dec 1963        N/A      N/A      N/A     N/A      4.17
Dec 1964        N/A      N/A      N/A     N/A      4.19
Dec 1965        N/A      N/A      N/A     N/A      4.23
Dec 1966        N/A      N/A      N/A     N/A      4.45
Dec 1967        N/A      N/A      N/A     N/A      4.67
Dec 1968        N/A      N/A      N/A     N/A      4.68
Dec 1969        N/A      N/A      N/A     N/A      4.80
     


                                      -39-
<PAGE>

                  PERFORMANCE STATISTICS - TOTAL RETURN PERCENT


                                           S & P    Bank
             NAREIT -  Russell  Wilshire   Midcap  Savings 
             Equity     2000  Real Estate   400    Account
          Bank Savings Account
     
Dec 1970        N/A      N/A      N/A     N/A      5.14
Dec 1971        N/A      N/A      N/A     N/A      5.30
Dec 1972        8.01     N/A      N/A     N/A      5.37
Dec 1973       -15.52    N/A      N/A     N/A      5.51
Dec 1974       -21.40    N/A      N/A     N/A      5.96
Dec 1975        19.30    N/A      N/A     N/A      6.21
Dec 1976        47.59    N/A      N/A     N/A      6.23
Dec 1977        22.42    N/A      N/A     N/A      6.39
Dec 1978        10.34    N/A      13.04   N/A      6.56
Dec 1979        35.86    43.09    70.81   N/A      7.29
Dec 1980        24.37    38.58    22.08   N/A      8.78
Dec 1981         6.00     2.03     7.18   N/A     10.71
Dec 1982        21.60    24.95    24.47   22.68   11.19
Dec 1983        30.64    29.13    27.61   26.10    9.71
Dec 1984        20.93    -7.30    20.64    1.18    9.92
Dec 1985        19.10    31.05    22.20   35.58    9.02
Dec 1986        19.16     5.68    20.30   16.21    7.84
Dec 1987        -3.64    -8.77    -7.86   -2.03    6.92
Dec 1988        13.49    24.89    24.18   20.87    7.20
Dec 1989         8.84    16.24     2.37   35.54    7.91
Dec 1990       -15.35   -19.51   -33.46   -5.12    7.80
Dec 1991        35.7     46.05    20.03    50.1    4.61
Dec 1992        14.59    18.41     7.36    11.91   2.89
Dec 1993        19.65    18.91    15.24    13.96   2.73
Dec 1994         3.17    -1.82     1.64    -3.57   4.96
Dec 1995        15.27    28.44    13.65    30.94   5.24
     
Source:  Ibbotson Associates
          
     
     


                                      -40-
<PAGE>



                                   APPENDIX c

         The Pioneer  family of mutual  funds was  established  in 1928 with the
creation of Pioneer  Fund.  Pioneer is one of the  oldest,  most  respected  and
successful money managers in the United States.

         As of December 31, 1995, PMC employed a professional  investment  staff
of 44, with a combined average of 15 years' experience in the financial services
industry.

         At December 31, 1995,  there were  637,060  non-retirement  shareholder
accounts and 345,309  retirement  shareholder  accounts in the Pioneer's  funds.
Total  assets for all Pioneer  Funds at December  31, 1995 were  $12,764,708,124
representing 982,369 shareholder accounts.








                                      -41-
    

<PAGE>

                         PIONEER SHORT-TERM INCOME TRUST

                            PART C. OTHER INFORMATION


Item 24.  Financial Statements and Exhibits
  
          (a)   Financial Statements:

   
                The financial  highlights of the Registrant are included in Part
                A of the Registration  Statement and the financial statements of
                the Registrant are  incorporated by reference into Part B of the
                Registration   Statement   from  the  1995   Annual   Report  to
                Shareholders  for  the  year  ended  November  30,  1995  (filed
                electronically on January 29, 1996; file no. 33-47613; accession
                number 0000887228-96-000006 ).
    


          (b)   Exhibits:

   
                1.1     Declaration of Trust*

                1.2     Establishment and Designation of Classes*

                2.      By-Laws*

                3.      None

                4.      Specimen Stock Certificate*

                5.      Form of Management Contract*

                6.1     Form of Underwriting Agreement*

                6.2     Form of Dealer Sales Agreement*

                7.      None

                8.      Form of Custodian Agreement*

                9.      Form of Investment Company Service Agreement*

                10.     Opinion of Hale and Dorr_

                11.     Consent of Independent Public Accountants_

                12.     None

                13.     Stock Purchase Agreement*
    

                                      C-1
<PAGE>

                14.     None

   
                15.1    Amended Form of Distribution Plan*

                15.2    Form of Class B Rule 12b-1 Distribution Plan*

                16.1    Schedule of Computation of Total Return*

                16.2    Schedule of Computation of Yield*

                17.     Financial Data Schedule_
                    
                19.1    Powers  of  Attorney  (John  F.  Cogan,  Jr.;  David  D.
                        Tripple; William H. Keough; Franklin R. Johnson; John W.
                        Kendrick; Marguerite A. Piret; John Winthrop)*

                19.2    Powers of Attorney (Richard H. Egdahl, M.D.; Margaret B.
                        W. Graham)*

                19.3    Powers of Attorney (Stephen K. West)*

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

*    Incorporated by reference from the Registrant's  Registration  Statement on
     Form N-1A (File Nos.  33-47613 and 811-6657) as filed  electronically  with
     the  Securities  and  Exchange  Commission  (the  "SEC") on March 29,  1995
     (accession number 0000887228-95-000011).

_    Filed electronically herewith in accordance with EDGAR requirements.


Item 25. Persons Controlled By or Under
         Common Control With Registrant

                                                       Percent    State/Country
                                                         of            of
         Company                           Owned By    Shares     Incorporation

Pioneering Management Corp. (PMC)             PGI       100%           DE
Pioneering Services Corp. (PSC)               PGI       100%           MA
Pioneer Capital Corp. (PCC)                   PGI       100%           MA
Pioneer Fonds Marketing GmbH (GmbH)           PGI       100%           MA
Pioneer SBIC Corp. (SBIC)                     PGI       100%           MA
Pioneer Associates, Inc. (PAI)                PGI       100%           MA
Pioneer International Corp. (PInt)            PGI       100%           MA
Pioneer Plans Corp. (PPC)                     PGI       100%           MA
Pioneer Goldfields Ltd (PGL)                  PGI       100%           MA
Pioneer Investments Corp. (PIC)               PGI       100%           MA
    


                                      C-2
<PAGE>

   
Pioneer Metals and Technology, Inc. (PMT)     PGI       100%           DE
Pioneer First Polish Trust Fund
    Joint Stock Co. (First Polish)            PGI       100%         Poland
Teberebie Goldfields Ltd. (TGL)               PGI        90%          Ghana
Pioneer Funds Distributor, Inc. (PFD)         PMC       100%           MA
SBIC's outstanding capital stock              PCC       100%           MA

THE FUNDS:  All are parties to management contracts with PMC.

                                            BUSINESS
                  FUND                       TRUST

Pioneer International Growth Fund             MA
Pioneer Europe Fund                           MA
Pioneer Emerging Markets Fund                 DE
Pioneer India Fund                            DE
Pioneer Growth Trust                          MA
Pioneer Mid-Cap Fund                          DE
Pioneer Growth Shares                         DE
Pioneer Small Company Fund                    DE
Pioneer Fund                                  MA
Pioneer II                                    MA
Pioneer Real Estate Shares                    DE
Pioneer Short-Term Income Fund                MA
Pioneer America Income Trust                  MA
Pioneer Bond Fund                             MA
Pioneer Income Fund                           DE
Pioneer Intermediate Tax-Free Fund            MA
Pioneer Tax-Free Income Fund                  DE
Pioneer Tax-Free State Series Trust           MA
Pioneer Money Market Trust                    DE
Pioneer Variable Contracts Trust              DE
Pioneer Interest Shares, Inc.                 NE Corporation

OTHER:


^27  SBIC is the sole general partner of Pioneer Ventures Limited Partnership, a
     Massachusetts limited partnership.

^27  ITI Pioneer AMC Ltd.  (ITI  Pioneer)  (Indian  Corp.),  is a joint  venture
     between PMC and Investment Trust of India Ltd. (ITI) (Indian Corp.)

^27  ITI and PMC own  approximately  54% and  45%,  respectively,  of the  total
     equity capital of ITI Pioneer.
    


                                      C-3
<PAGE>



   
                               JOHN F. COGAN, JR.


Owns approximately 15% of the outstanding shares of PGI.



                                                          TRUSTEE/
         ENTITY        CHAIRMAN         PRESIDENT         DIRECTOR    OTHER

Pioneer Family
  of Mutual Funds           X                X              X

PGL                         X                X              X

PGI                         X                X              X

PPC                                          X              X

PIC                                          X              X

PIntl                                        X              X

PMT                                          X              X

PCC                                                         X

PSC                                                         X

PMC                         X                               X

PFD                         X                               X

TGL                         X                               X

First Polish                X                                       Member of
                                                                    Supervisory
                                                                    Board

Hale and Dorr                                                       Partner

GmbH                                                                Chairman of
                                                                    Supervisory
                                                                    Board

Item 26.  Number of Holders of Securities

                  The  following  table  sets  forth the  approximate  number of
recordholders  of each class of securities of the  Registrant as of February 29,
1996:
    

                                      C-4
<PAGE>

                                 Class A   Class B

   
Number of Record Holders:          2,406    190
    


Item 27. Indemnification

                  Except for the  Declaration  of Trust  dated  April 30,  1992,
establishing  the  Registrant as a trust under  Massachusetts  law,  there is no
contract,  arrangement or statute under which any director, officer, underwriter
or  affiliated  person  of  the  Registrant  is  insured  or  indemnified.   The
Declaration  of Trust  provides  that no Trustee or officer will be  indemnified
against any  liability  to which the  Registrant  would  otherwise be subject by
reason of or for willful  misfeasance,  bad faith,  gross negligence or reckless
disregard of such person's duties.

Item 28. Business and Other Connections of Investment Adviser

                  All of the  information  required by this item is set forth in
the Forms ADV, as amended, of the Registrant's  Manager,  Pioneering  Management
Corporation.  The  following  sections  of each such  Form ADV are  incorporated
herein by reference:

                  (a) Items 1 and 2 of Part 2;

                  (b) Section IV, Business Background, of
                      each Schedule D.

Item 29. Principal Underwriter

                  (a)  See Item 25 above.

                  (b)      Directors and Officers of PFD:


                        Positions and Offices      Positions and Offices
Name                    with Underwriter           with Registrant

John F. Cogan, Jr.      Director and Chairman      Chairman of the Board,
                                                   President and Trustee

Robert L. Butler        Director and President     None

       

David D. Tripple        Director                   Executive Vice
                                                   President and Trustee

   
Steven M. Graziano      Senior                     None
                        Vice President
    

                                      C-5
<PAGE>

   
Stephen W. Long         Senior                     None
                        Vice President
    

John W. Drachman        Vice President             None

   
Mary Kleeman            Vice President             None

Barry G. Knight         Vice President             None
    

William A. Misata       Vice President             None

Anne W. Patenaude       Vice President             None

   
Elizabeth B. Rice       Vice President             None

Gail A. Smyth           Vice President             None

Constance D. Spiros     Vice President             None

Marcy L. Supovitz       Vice President             None

Steven R. Berke         Assistant                  None
                        Vice President

Mary Sue Hoban          Assistant                  None
                        Vice President
    

William H. Keough       Treasurer                  Treasurer

Roy P. Rossi            Assistant Treasurer        None

Joseph P. Barri         Clerk                      Secretary

   
Robert P. Nault         Assistant Clerk            Assistant Secretary
    


                  (c)      Not applicable.



Item 30. Location of Accounts and Records

                  The accounts and records are  maintained  at the  Registrant's
office at 60 State Street, Boston, Massachusetts; contact the Treasurer.

Item 31. Management Services

                  The  Registrant is a party to one  contract,  described in the
Prospectus and the Statement of Additional Information,  under 


                                      C-6
<PAGE>

                    which it receives  management  and  advisory  services  from
                    Pioneering Management Corporation.

Item 32. Undertakings

                  (A)      None.

                  (B)      None.

                  (C) The Registrant hereby undertakes to deliver or cause to be
delivered with the Prospectus,  to each person to whom the Prospectus is sent or
given,  a copy of the  Registrant's  annual  report  to  shareholders  furnished
pursuant to and meeting the  requirements of Rule 30d-1 from which the specified
information is  incorporated  by reference,  unless such person  currently holds
securities of the  Registrant  and otherwise has received a copy of such report,
in which case the Registrant shall state in the Prospectus that it will furnish,
without  charge,  a copy of such  report on request,  and the name,  address and
telephone number of the person to whom such a request should be directed.











                                      C-7
<PAGE>


                                   SIGNATURES

   
     Pursuant  to  the  requirements  of the  Securities  Act of  1933  and  the
Investment   Company  Act  of  1940,   the   Registrant  has  duly  caused  this
Post-Effective  Amendment No. 4 to its Registration  Statement (the "Amendment")
(which meets all the requirements for effectiveness pursuant to paragraph (b) of
Rule 485 and the  Securities  Act of 1933) to be  signed  on its  behalf  by the
undersigned,   thereunto  duly  authorized,  in  the  City  of  Boston  and  The
Commonwealth of Massachusetts, on the 28th day of March, 1996.
    


                                             PIONEER SHORT-TERM INCOME TRUST




   
                                             By:  /s/John F. Cogan, Jr.
                                                  John F. Cogan, Jr.
                                                  Chairman


     Pursuant  to  the   requirements  of  the  Securities  Act  of  1933,  this
Post-Effective  Amendment  No.  4  to  the  Registration  Statement  of  Pioneer
Short-Term Income Trust (File Nos. 33-47613;  811-6657) has been signed below by
the following persons in the capacities and on the dates indicated:
    

         Signature                                                Date

   
Principal Executive Officer:        )
                                    )
                                    )
/s/John F. Cogan, Jr.               )
John F. Cogan, Jr.*                 )
                                    )
                                    )
Principal Financial and             )                         March 28, 1996
Accounting Officer:                 )
                                    )
                                    )
                                    )
/s/William H. Keough                )
William H. Keough, Treasurer*       )
    





<PAGE>


A MAJORITY OF THE BOARD OF TRUSTEES:


   
                              )
/s/John F. Cogan, Jr.         )
John F. Cogan, Jr.*           )
                              )
                              )
/s/John W. Kendrick           )
John W. Kendrick*             )
                              )
                              )
/s/Marguerite A. Piret        )
Marguerite A. Piret*          )
                              )
                              )
/s/David D. Tripple           )
David D. Tripple*             )
                              )
                              )
/s/John Winthrop              )                      March 28, 1996
John Winthrop*                )
                              )
                              )
/s/Margaret B.W. Graham       )
Margaret B.W. Graham*         )
                              )
                              )
/s/Richard H. Egdahl, M.D.    )
Richard H. Egdahl, M.D.*      )
                              )
                              )
/s/Stephen K. West            )
Stephen K. West*              )
    



*By:     /s/Joseph P. Barri
         Joseph P. Barri
         Attorney-in-fact




<PAGE>


                                  Exhibit Index



Exhibit
Number            Document Title

       

   
10.               Opinion of Hale and Dorr
    

11.               Consent of Arthur Andersen LLP
       
17.               Financial Data Schedule




   
                    CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS



     As  independent  public  accountants,  we hereby  consent to the use of our
report dated  December 29, 1995 included in Pioneer  Short-Term  Income  Trust's
1995 Annual  Report (and to all  references  to our firm)  included in or made a
part of the Pioneer Short-Term Income Trust  Post-Effective  Amendment No. 5 and
Amendment  No. 6 to  Registration  Statement  File Nos.  33-47613 and  811-6657,
respectively.




                                           /S/ARTHUR ANDERSEN LLP
                                           ARTHUR ANDERSEN LLP




Boston, Massachusetts
March 28, 1996
    



                                  HALE AND DORR
                                 60 State Street
                           Boston, Massachusetts 02109



                                                  March 22, 1996


Board of Trustees of Pioneer
   Short-Term Income Trust
60 State Street
Boston, MA 02109

Re:      Post-Effective Amendment No. 4 to Registration Statement on
         Form N-1A (File No. 33-47613) (the "Registration Statement")

Ladies and Gentlemen:

         Pioneer  Short-Term  Income  Trust  (the  "Trust")  is a  Massachusetts
business trust  organized under a written  Declaration of Trust dated,  executed
and delivered in Boston, Massachusetts on April 30, 1992, as amended December 7,
1993 and  November  7, 1995 (as so amended,  the  "Declaration  of Trust").  The
beneficial  interests  thereunder  are  represented  by  transferable  shares of
beneficial interest without par value.

         The Trustees of the Trust have the powers set forth in the  Declaration
of Trust,  subject to the terms,  provisions  and conditions  therein  provided.
Pursuant to Article V, Section 5.1 of the  Declaration  of Trust,  the number of
shares of beneficial  interest  authorized to be issued under the Declaration of
Trust is unlimited and the Trustees are authorized to divide the shares into one
or more series of shares and one or more classes  thereof as they deem necessary
or  desirable.  As of the date of this  opinion,  the Trustees  have divided the
shares of the Trust into three classes, designated as Class A, Class B and Class
C, but only Class A and Class B shares  have been  issued to date.  Pursuant  to
Article V,  Section 5.4 of the  Declaration  of Trust,  the  Trustees  may issue
shares of any series for such amount and type of  consideration,  including cash
or property,  and on such terms as they may deem best without action or approval
of the shareholders.


<PAGE>
Board of Trustees of Pioneer
      Short-Term Income Trust
March 22, 1996
Page 2


         We understand  that you are about to register  under the Securities Act
of 1933, as amended,  1,891,304 shares of beneficial  interest by Post-Effective
Amendment No. 4 to the Trust's Registration Statement.

         We have examined the Declaration of Trust, the By-laws,  resolutions of
the Board of  Trustees,  the  minutes of the Board of  Trustees  relating to the
authorization  and issuance of shares of beneficial  interest of the Trust,  and
such other documents as we have deemed necessary or appropriate for the purposes
of this opinion,  including,  but not limited to, originals, or copies certified
or otherwise identified to our satisfactions,  of such documents,  Trust records
and  other  instruments.  In our  examination  of the above  documents,  we have
assumed the  genuineness of all  signatures,  the  authenticity of all documents
submitted  to us as  originals,  the  conformity  to original  documents  of all
documents  submitted to us as certified or photostatic  copies, the authenticity
of the  originals  of such latter  documents  and the legal  competence  of each
individual executing any documents.

         For purposes of this opinion  letter,  we have not made an  independent
review of the laws of any state or jurisdiction  other than The  Commonwealth of
Massachusetts   and  express  no  opinion  with  respect  to  the  laws  of  any
jurisdiction other than the laws of The Commonwealth of Massachusetts.  Further,
we  express no opinion  as to  compliance  with any state or federal  securities
laws, including the securities laws of The Commonwealth of Massachusetts.

         Our opinion below, as it relates to the non-assessability of the shares
of the  Trust,  is  qualified  to  the  extent  that  under  Massachusetts  law,
shareholders of a Massachusetts  business trust,  such as the Trust, may be held
personally  liable for the obligations of such Trust.  In this regard,  however,
please be advised that the Declaration of Trust disclaims  shareholder liability
for acts or obligations of the Trust and provides that notice of such disclaimer
may be given in each note,  bond,  contract,  certificate or undertaking made or
issued by or on behalf of the Trust. Also, the Declaration of Trust provides for
indemnification  out  of  Trust  property  for  all  loss  and  expense  of  any
shareholder held personally  liable solely by reason of his being or having been
a shareholder  of the Trust;  provided,  however,  that no Trust property may be
used to indemnify  any  shareholder  of any series of the Trust other than Trust
property allocated or belonging to that series.

<PAGE>
Board of Trustees of Pioneer
      Short-Term Income Trust
March 22, 1996
Page 2


         We are of the opinion that all necessary Trust action  precedent tot he
issuance of the Shares of beneficial interest of the Trust comprising the shares
covered by Post-Effective Amendment No. 4 to the Registration Statement has been
duly taken,  and that all such Shares may legally and validly be issued for cash
or property,  and when sold will be fully paid and  non-assessable  by the Trust
upon receipt by the Trust or its agent of the Trust's  Declaration  of Trust and
the  Registration  Statement,  subject to compliance  with the Securities Act of
1933,  the  Investment  Company  Act of  1940  and  the  applicable  state  laws
regulating the sale of securities.

         We consent to your filing this opinion with the Securities and Exchange
Commission as an Exhibit to  Post-Effective  Amendment No. 4 to the Registration
Statement.

                                                  Very truly your,

                                                  /s/ Hale and Dorr

                                                  HALE AND DORR





[ARTICLE] 6
[CIK] 0000887228
[NAME] PIONEER SHORT-TERM INCOME TRST
[SERIES]
   [NUMBER] 001
   [NAME] PIONEER SHORT-TERM INCOME TRST CLASS A
[PERIOD-TYPE]                   YEAR
[FISCAL-YEAR-END]                          NOV-30-1995
[PERIOD-END]                               NOV-30-1995
[INVESTMENTS-AT-COST]                         55724277
[INVESTMENTS-AT-VALUE]                        56107160
[RECEIVABLES]                                   755509
[ASSETS-OTHER]                                    2177
[OTHER-ITEMS-ASSETS]                            132446
[TOTAL-ASSETS]                                56997292
[PAYABLE-FOR-SECURITIES]                             0
[SENIOR-LONG-TERM-DEBT]                              0
[OTHER-ITEMS-LIABILITIES]                       213550
[TOTAL-LIABILITIES]                             213550
[SENIOR-EQUITY]                                      0
[PAID-IN-CAPITAL-COMMON]                      59192702
[SHARES-COMMON-STOCK]                         14008266
[SHARES-COMMON-PRIOR]                         15736555
[ACCUMULATED-NII-CURRENT]                        16107
[OVERDISTRIBUTION-NII]                               0
[ACCUMULATED-NET-GAINS]                      (2807950)
[OVERDISTRIBUTION-GAINS]                             0
[ACCUM-APPREC-OR-DEPREC]                        382883
[NET-ASSETS]                                  56783742
[DIVIDEND-INCOME]                                    0
[INTEREST-INCOME]                              4246756
[OTHER-INCOME]                                       0
[EXPENSES-NET]                                (517319)
[NET-INVESTMENT-INCOME]                        3729437
[REALIZED-GAINS-CURRENT]                      (804710)
[APPREC-INCREASE-CURRENT]                      2442228
[NET-CHANGE-FROM-OPS]                          5366955
[EQUALIZATION]                                       0
[DISTRIBUTIONS-OF-INCOME]                    (3791748)
[DISTRIBUTIONS-OF-GAINS]                             0
[DISTRIBUTIONS-OTHER]                                0
[NUMBER-OF-SHARES-SOLD]                        4746546
[NUMBER-OF-SHARES-REDEEMED]                    7218106
[SHARES-REINVESTED]                             743271
[NET-CHANGE-IN-ASSETS]                       (5486241)
[ACCUMULATED-NII-PRIOR]                         256973
[ACCUMULATED-GAINS-PRIOR]                    (2003240)
[OVERDISTRIB-NII-PRIOR]                              0
[OVERDIST-NET-GAINS-PRIOR]                           0
[GROSS-ADVISORY-FEES]                           291294
[INTEREST-EXPENSE]                                   0
[GROSS-EXPENSE]                                 825975
[AVERAGE-NET-ASSETS]                          55216471
[PER-SHARE-NAV-BEGIN]                             3.75
[PER-SHARE-NII]                                   0.25
[PER-SHARE-GAIN-APPREC]                           0.10
[PER-SHARE-DIVIDEND]                            (0.26)
[PER-SHARE-DISTRIBUTIONS]                            0
[RETURNS-OF-CAPITAL]                                 0
[PER-SHARE-NAV-END]                               3.84
[EXPENSE-RATIO]                                   0.86
[AVG-DEBT-OUTSTANDING]                               0
[AVG-DEBT-PER-SHARE]                                 0

<PAGE>
[ARTICLE] 6
[CIK] 0000887228
[NAME] PIONEER SHORT-TERM INCOME TRST
[SERIES]
   [NUMBER] 002
   [NAME] PIONEER SHORT-TERM INCOME TRST CLASS B
[PERIOD-TYPE]                   YEAR
[FISCAL-YEAR-END]                          NOV-30-1995
[PERIOD-END]                               NOV-30-1995
[INVESTMENTS-AT-COST]                         55724277
[INVESTMENTS-AT-VALUE]                        56107160
[RECEIVABLES]                                   755509
[ASSETS-OTHER]                                    2177
[OTHER-ITEMS-ASSETS]                            132446
[TOTAL-ASSETS]                                56997292
[PAYABLE-FOR-SECURITIES]                             0
[SENIOR-LONG-TERM-DEBT]                              0
[OTHER-ITEMS-LIABILITIES]                       213550
[TOTAL-LIABILITIES]                             213550
[SENIOR-EQUITY]                                      0
[PAID-IN-CAPITAL-COMMON]                      59192702
[SHARES-COMMON-STOCK]                           759882
[SHARES-COMMON-PRIOR]                           847573
[ACCUMULATED-NII-CURRENT]                        16107
[OVERDISTRIBUTION-NII]                               0
[ACCUMULATED-NET-GAINS]                      (2807950)
[OVERDISTRIBUTION-GAINS]                             0
[ACCUM-APPREC-OR-DEPREC]                        382883
[NET-ASSETS]                                  56783742
[DIVIDEND-INCOME]                                    0
[INTEREST-INCOME]                              4246756
[OTHER-INCOME]                                       0
[EXPENSES-NET]                                (517319)
[NET-INVESTMENT-INCOME]                        3729437
[REALIZED-GAINS-CURRENT]                      (804710)
[APPREC-INCREASE-CURRENT]                      2442228
[NET-CHANGE-FROM-OPS]                          5366955
[EQUALIZATION]                                       0
[DISTRIBUTIONS-OF-INCOME]                     (178555)
[DISTRIBUTIONS-OF-GAINS]                             0
[DISTRIBUTIONS-OTHER]                                0
[NUMBER-OF-SHARES-SOLD]                        3354078
[NUMBER-OF-SHARES-REDEEMED]                    3478134
[SHARES-REINVESTED]                              36365
[NET-CHANGE-IN-ASSETS]                       (5486241)
[ACCUMULATED-NII-PRIOR]                         256973
[ACCUMULATED-GAINS-PRIOR]                    (2003240)
[OVERDISTRIB-NII-PRIOR]                              0
[OVERDIST-NET-GAINS-PRIOR]                           0
[GROSS-ADVISORY-FEES]                           291294
[INTEREST-EXPENSE]                                   0
[GROSS-EXPENSE]                                 825975
[AVERAGE-NET-ASSETS]                           3030304
[PER-SHARE-NAV-BEGIN]                             3.75
[PER-SHARE-NII]                                   0.22
[PER-SHARE-GAIN-APPREC]                           0.11
[PER-SHARE-DIVIDEND]                            (0.23)
[PER-SHARE-DISTRIBUTIONS]                            0
[RETURNS-OF-CAPITAL]                                 0
[PER-SHARE-NAV-END]                               3.85
[EXPENSE-RATIO]                                   1.63
[AVG-DEBT-OUTSTANDING]                               0
[AVG-DEBT-PER-SHARE]                                 0


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