PIONEER MONEY MARKET TRUST
485BPOS, 1996-04-29
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     As Filed With The Securities and Exchange Commission on April 29, 1996
    
                     Registration Nos. 33-13179 and 811-5099

                       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. 13                  / X /
    
                                                                   

                                     and/or
                                                                   
REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940    /   /
                                                                   
   
                  Amendment No. 14                                 / X /
    

                        (Check appropriate box or boxes)

                           PIONEER MONEY MARKET 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 (check appropriate box)

   
                  _X_      immediately upon filing pursuant to paragraph (b)
                  ___      on [date] pursuant to paragraph (b)
                  ___      60 days after filing pursuant to paragraph (a)
                  ___      on [date] pursuant to paragraph (a) of Rule 485


Registrant  has  registered  an  indefinite   amount  of  securities  under  the
Securities Act of 1933 pursuant to Section 24(f) of the  Investment  Company Act
of 1940.  The  Registrant  filed the notice  required by Rule 24f-2 for its most
recent fiscal year on or about February 28, 1996.
    



<PAGE>


   
        CALCULATION OF REGISTRATION FEE UNDER THE SECURITIES ACT OF 1933





Title of      Amount of      Proposed            Proposed
Securities    Shares         Maximum             Maximum            Amount of
Being         Being          Offering            Aggregate          Registration
Registered    Registered     Price Per Unit      Offering Price     Fee

Shares of
Beneficial    10,642,043      $1.00              $10,629,467.59     $100*
Interest

*This  calculation  has been made  pursuant to Rule 24e-2  under the  Investment
Company  Act of 1940.  During  its fiscal  year ended  December  31,  1995,  the
Registrant redeemed or repurchased 728,125,792 shares of beneficial interest, of
which 717,773,749 were utilized by the Registrant on its Rule 24f-2 Notice filed
on or about  February 28, 1996 and 10,352,043 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 10,352,043  shares.  An additional  290,000 shares
being  registered  hereby are valued at the public offering price of $1.00 as of
April 18, 1996.

    


<PAGE>
   
                           PIONEER CASH RESERVES FUND

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


                                                   Location in Prospectus
     Form N-1A Item Number                            or Statement of
          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;
                                                   Management of the Trust
    

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

6.   Capital Stock and Other
     Securities....................................Prospectus - Dividends,
                                                   Distributions and Taxation;
                                                   Management of the Trust; The
                                                   Trust

7.   Purchase of Securities
     Being Offered.................................Prospectus - How to Buy Fund
                                                   Shares; How to Exchange Fund
                                                   Shares; Dividends,
                                                   Distributions and Taxation

8.   Redemption or Repurchase......................Prospectus - How to Sell Fund
                                                   Shares; How to Exchange Fund
                                                   Shares

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


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

13.  Investment Objectives and Policy..............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;
                                                   Custodian; Independent Public
                                                   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;
                                                   Systematic Withdrawal Plan

20.  Tax Status....................................Statement of Additional
                                                   Information - Tax Status

21.  Underwriters..................................Statement of Additional
                                                   Information - Underwriting
                                                   Agreement and Distribution
                                                   Plans; Principal Underwriter
<PAGE>
                                                   Location in Prospectus
     Form N-1A Item Number                            or Statement of
          and Caption                              Additional Information


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

   
23.  Financial Statements..........................Statement of Additional
                                                   Information - Financial
                                                   Statements
    




<PAGE>
   
                       PIONEER U.S. GOVERNMENT MONEY FUND

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


                                                   Location in Prospectus
     Form N-1A Item Number                            or Statement of
          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;
                                                   Management of the Trust
    

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

6.   Capital Stock and Other
     Securities....................................Prospectus - Dividends,
                                                   Distributions and Taxation;
                                                   Management of the Trust; The
                                                   Trust

7.   Purchase of Securities
     Being Offered.................................Prospectus - How to Buy Fund
                                                   Shares; How to Exchange Fund
                                                   Shares; Dividends,
                                                   Distributions and Taxation

8.   Redemption or Repurchase......................Prospectus - How to Sell Fund
                                                   Shares; How to Exchange Fund
                                                   Shares

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
                                                   Location in Prospectus

<PAGE>

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


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

13.  Investment Objectives and Policy..............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;
                                                   Custodian; Independent Public
                                                   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;
                                                   Systematic Withdrawal Plan

20.  Tax Status....................................Statement of Additional
                                                   Information - Tax Status

21.  Underwriters..................................Statement of Additional
                                                   Information - Underwriting
                                                   Agreement and Distribution
                                                   Plans; Principal Underwriter
<PAGE>
                                                   Location in Prospectus
     Form N-1A Item Number                            or Statement of
          and Caption                              Additional Information


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

   
23.  Financial Statements..........................Statement of Additional
                                                   Information - Financial
                                                   Statements
    




<PAGE>
                                                                [Pioneer logo} 

   
Pioneer 
Cash Reserves 
Fund 

Class A, Class B and Class C Shares 

Prospectus 
April 29, 1996 

   Pioneer Cash Reserves Fund (the "Fund") is a money market fund. The Fund's 
Class A shares are offered without a sales charge. The Fund's investment 
objective is to provide high current income, preservation of capital and 
liquidity through investments in high-quality short-term securities. The Fund 
invests in money market instruments, including: securities of the United 
States ("U.S.") government and its agencies and instrumentalities; 
certificates of deposit; corporate commercial paper; and other debt 
instruments. 

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

   The Fund's yield will fluctuate. Shares in the Fund are not deposits or 
obligations of, or guaranteed or endorsed by, any bank, and the shares are 
not federally insured by the Federal Deposit Insurance Corporation, the 
Federal Reserve Board or any other agency. INVESTMENTS IN THE FUND ARE 
NEITHER INSURED NOR GUARANTEED BY THE UNITED STATES GOVERNMENT. THERE CAN BE 
NO ASSURANCE THAT THE FUND WILL BE ABLE TO MAINTAIN A STABLE NET ASSET VALUE 
OF $1.00 PER SHARE. 

            TABLE OF CONTENTS                                     PAGE 
- --------     -------------------------------------------------   ------- 
I.          EXPENSE INFORMATION                                     2 
II.         FINANCIAL HIGHLIGHTS                                    3 
III.        THE TRUST                                               4 
IV.         INVESTMENT OBJECTIVE AND POLICIES                       4 
             Suitability                                            4 
             Investment Policies                                    4 
             Additional Information                                 4 
V.          FUND SHARE ALTERNATIVES                                 5 
VI.         SHARE PRICE                                             6 
VII.        HOW TO BUY FUND SHARES                                  6 
VIII.       HOW TO SELL FUND SHARES                                 9 
IX.         HOW TO EXCHANGE FUND SHARES                            11 
X.          DISTRIBUTION PLANS                                     12 
XI.         DIVIDENDS, DISTRIBUTIONS AND TAXATION                  13 
XII.        MANAGEMENT OF THE TRUST                                14 
XIII.       DESCRIPTION OF SHARES AND VOTING RIGHTS                15 
XIV.        SHAREHOLDER SERVICES                                   15 
             Account and Confirmation Statements                   16 
             Additional Investments                                16 
             Automatic Investment Plans                            16 
             Financial Reports and Tax Information                 16 
             Dividend Options                                      16 
             Voluntary Tax Withholding                             16 
             Retirement Plans                                      16 
             Yield Information                                     17 
             Telecommunications Device for the Deaf (TDD)          17 
             Systematic Withdrawal Plans                           17 
             Telephone Transactions and Related Liabilities        17 
             FactFoneSM                                            17 
XV.         INVESTMENT RESULTS                                     17 
XVI.        APPENDIX                                               18 
    

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 Fund. The table reflects annual operating expenses based upon actual 
expenses of the Class A shares for the fiscal year ended December 31, 1995, 
expressed as a percentage of the average net assets of the Fund and, for 
Class B and Class C shares, percentages are based on estimated expenses that 
would have been incurred during the fiscal year had such shares been 
outstanding. 

Shareholder Transaction Expenses:          Class A     Class B     Class C+ 
Maximum Initial Sales Charge on 
  Purchases (as a percentage of 
  offering price)                           None        None         None 
Maximum Sales Charge on Reinvestment 
  of Dividends                              None        None         None 
Maximum Deferred Sales Charge (as a 
  percentage of original purchase 
  price or redemption proceeds, as 
  applicable)                               None        4.00%        1.00% 
Redemption Fee(1)                           None        None         None 
Exchange Fee                                None        None         None 
Annual Operating Expenses (as a 
  percentage of average net assets): 
Management Fee (after fee 
  reduction)(2)                             0.13%       0.13%        0.13% 
12b-1 Fees                                  0.15%       1.00%        1.00% 
Other Expenses (including transfer 
  agent fee, custodian fees and 
  accounting and printing expenses)         0.57%       0.48%        0.48% 
                                            ------      ------      --------- 
Total Operating Expenses (after fee 
  reduction)(2)                             0.85%       1.61%        1.61% 
                                            ======      ======      ========= 

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

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

   
(2) Effective April 1, 1995, Pioneering Management Corporation ("PMC"), the 
    Fund's investment adviser, has agreed not to impose all or a portion of 
    its management fee and to make other arrangements, if necessary, to limit 
    the Class A operating expenses of the Fund to 0.85% of the average daily 
    net assets attributable to the Class A shares. The portion of fund-wide 
    expenses attributable to Class B and Class C shares will be only reduced 
    to the extent such expenses were reduced for the Class A shares of the 
    Fund. This agreement is voluntary and temporary and may be revised or 
    terminated at any time. 

Expenses Absent Fee Reduction           Class A     Class B     Class C 
                                        --------    --------   ---------- 
Management Fee                           0.40%       0.40%        0.40% 
Total Operating Expenses                 1.15%       1.88%        1.88% 

 Example: 
    

  You would pay the following expenses on a $1,000 investment, assuming a 5% 
annual return and constant expenses, with or without redemption at the end of 
each time period: 

   
                              1 Year     3 Years    5 Years     10 Years 
                              -------     -------    -------   --------- 
Class A Shares                  $ 8        $26        $ 46        $101 
Class B Shares 
  --Assuming complete 
    redemption at end of 
    period                      $56        $81        $108        $170* 
 --Assuming no redemption       $16        $51        $ 88        $170* 
Class C Shares** 
  --Assuming complete 
      redemption at 
      end of period             $26        $51        $ 88        $192 
 --Assuming no 
   redemption                   $16        $51        $ 88        $192 

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

  **Class C shares redeemed during the first year after purchase are subject 
    to a 1% contingent deferred sales charge ("CDSC"). 
    

  The example above assumes reinvestment of all dividends and distributions 
and that the percentage amounts listed under "Annual Operating Expenses" 
remain the same each year. 

  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. 

   
  A sales charge may be applied to exchanges of shares of the Fund for shares 
of certain other Pioneer mutual funds. See "How to Exchange Fund Shares." The 
payment of Rule 12b-1 fees by the Fund may result in long-term shareholders 
of the Fund 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"). 

  For further information regarding management fees, 12b-1 fees and other 
expenses of the Fund, including information regarding the basis upon which 
management fees and 12b-1 fees are paid, see "Management of the Trust," 
"Distribution Plans" and "How To Buy Fund Shares" in this Prospectus and 
"Management of the Trust" and "Distribution Plans" in the Statement of 
Additional Information. 
    


                                      2 
<PAGE>
 
II. FINANCIAL HIGHLIGHTS 

   
  The following information has been derived from the Fund's financial 
statements dated December 31, 1995 which have been audited by Arthur Andersen 
LLP, independent public accountants and which appear in the Trust's (as 
defined in "The Trust") Annual Report incorporated by reference into the 
Statement of Additional Information. The information listed below should be 
read in conjunction with those financial statements. Class C shares are a new 
class of shares; no Financial Highlights exist for Class C shares. 

Pioneer Cash Reserves Fund 
Selected Data for each Class A Share Outstanding For the Periods Presented 

<TABLE>
<CAPTION>
                                                  For the Year Ended December 31, 
                                         -------------------------------------------------- 
                                           1995       1994      1993      1992       1991 
                                          -------    -------    ------    ------   -------- 
<S>                                     <C>        <C>        <C>       <C>        <C>
Net asset value, beginning of period       $1.00      $1.00     $1.00     $1.00      $1.00 
                                           -----      -----      ----      ----      ------ 
Income from investment operations: 
Net investment income                      $0.05      $0.03     $0.02     $0.03      $0.05 
Distributions to shareholders from: 
Net investment income                      (0.05)     (0.03)    (0.02)    (0.03)     (0.05) 
                                           -----      -----      ----      ----      ------ 
Net increase in net asset value            $0.00      $0.00     $0.00     $0.00      $0.00 
                                           -----      -----      ----      ----      ------ 
Net asset value, end of period             $1.00      $1.00     $1.00     $1.00      $1.00 
                                           =====      =====      ====      ====      ====== 
Total return*                               5.17%      3.57%     2.47%     3.06%      5.29% 
Ratio of net operating expenses to 
  average net assets                        0.88%+++   0.50%     0.75%     0.81%      0.88% 
Ratio of net investment income to 
  average net assets                        5.00%+++   2.59%     2.44%     3.03%      5.23% 
Net assets end of period (in 
  thousands)                            $163,820   $173,195   $64,841   $59,097    $73,010 
Ratios assuming no reduction of fees 
  or expenses: 
Net operating expenses                      1.15%      0.65%     1.10%     1.01%         + 
Net investment income                       4.73%      2.44%     2.09%     2.82%         + 
Ratios assuming a reduction of fees 
  and expenses by PMC and a reduction 
  for fees paid indirectly: 
  Net operating expenses                    0.82% 
  Net investment income                     5.06% 
</TABLE>

<TABLE>
<CAPTION>

                                                                               June 22, 
                                          For the Year Ended December 31,      1987 to 
                                          --------------------------------   December 31, 
                                           1990        1989        1988          1987 
                                          --------    --------    --------   ------------ 
<S>                                      <C>          <C>         <C>          <C>
Net asset value, beginning of period        $1.00       $1.00       $1.00        $1.00 
                                          -------     -------     -------      ---------- 
Income from investment operations: 
Net investment income                       $0.07       $0.08       $0.07        $0.03 
Distributions to shareholders from: 
Net investment income                       (0.07)      (0.08)      (0.07)       (0.03) 
                                          -------     -------     -------      ---------- 
Net increase in net asset value             $0.00       $0.00       $0.00        $0.00 
                                          -------     -------     -------      ---------- 
Net asset value, end of period              $1.00       $1.00       $1.00        $1.00 
                                          =======     =======     =======      ========== 
Total return*                                7.74%       8.80%       7.05%        3.48% 
Ratio of net operating expenses to 
  average net assets                         0.75%       0.82%       0.78%        0.53%** 
Ratio of net investment income to 
  average net assets                         7.53%       8.43%       6.91%        6.94%** 
Net assets end of period (in 
  thousands)                             $101,120     $80,121     $59,592      $34,756 
Ratios assuming no reduction of fees 
  or expenses: 
Net operating expenses                          +           +        0.91%        1.01%** 
Net investment income                           +           +        6.77%        6.46%** 
Ratios assuming a reduction of fees 
  and expenses by PMC and a reduction 
  for fees paid indirectly: 
  Net operating expenses 
Net investment income 
</TABLE>

Selected Data for each Class B Share Outstanding For the Periods Presented 

<TABLE>
<CAPTION>
                                                                March 31, 1995 to 
Class B***                                                      December 31, 1995 
                                                                -------------------- 
<S>                                                                 <C>
Net asset value, beginning of period                                $    1.00 
                                                                 ------------------ 
Income from investment operations: 
  Net investment income                                             $    0.03 
Distributions to shareholders from: 
  Net investment income                                                 (0.03) 
                                                                 ------------------ 
Net increase in net asset value                                     $    0.00 
                                                                 ------------------ 
Net asset value, end of period                                      $    1.00 
                                                                 ================== 
Total return*                                                            3.28% 
Ratio of net operating expenses to average net assets                    1.66%**++ 
Ratio of net investment income to average net assets                     4.20%**++ 
Net assets end of period (in thousands)                             $   7,574 
Ratios assuming no reduction of fees or expenses: 
Net operating expenses                                                   1.86%** 
Net investment income                                                    4.00%** 
Ratios assuming a reduction of fees and expenses by PMC and 
  a reduction for fees paid indirectly: 
Net operating expenses                                                   1.61%** 
Net investment income                                                    4.25%** 
</TABLE>

  * Assumes initial investment at net asset value at the beginning of each 
    period, reinvestment of all dividends and distributions, and the complete 
    redemption of the investment at the net asset value at the end of each 
    period. 

 ** Annualized. 

*** Class B Shares were first offered on March 31, 1995. 
  + No reduction of fees or expenses in this period. 
 ++ Ratios include fees paid indirectly. 
    


                                      3 
<PAGE>
 
III. THE TRUST 

   
  Pioneer Cash Reserves Fund is one series of Pioneer Money Market Trust (the 
"Trust"), an open-end, management investment company (commonly referred to as 
a mutual fund) organized as a Massachusetts business trust on March 31, 1987 
and reorganized as a Delaware business trust on March 30, 1995. Pioneer U.S. 
Government Money Fund is also a series of the Trust; however, it is closed to 
new shareholders. The Trust has authorized an unlimited number of shares, 
which are currently organized into these two series, and continuously offers 
its shares to the public. Under normal conditions, each series of the Trust 
must redeem shares upon the demand of any shareholder. The Trustees have the 
authority, without shareholder approval, to classify and reclassify the 
shares of the Funds or any new series of the Trust. As of the date of this 
Prospectus, the Trustees have authorized the issuance of a single class of 
shares for Pioneer U.S. Government Money Fund and, for Pioneer Cash Reserves 
Fund only, three classes of shares, designated Class A, Class B and Class C. 

IV. INVESTMENT OBJECTIVE AND POLICIES 

  The investment objective of Pioneer Cash Reserves Fund is to provide high 
current income, preservation of capital and liquidity through investments in 
high-quality short-term securities. 

  The Fund seeks to maintain a constant net asset value of $1.00 per share by 
investing in a portfolio of money market instruments maturing within 397 days 
and with a dollar-weighted average maturity of 90 days or less. 

  There can be no guarantee that the Fund will achieve its investment 
objective or that it will be able to maintain a constant $1.00 net asset 
value per share. 
    

Suitability 

   
  The Fund is designed to provide a convenient way for individual, corporate 
and institutional investors to earn income on their cash reserves, with easy 
access to their money and stable principal value. 

  Ownership of shares of the Fund also eliminates the bookkeeping and 
administrative inconvenience of purchasing money market securities directly. 
    

Investment Policies 

   
  Pioneer Cash Reserves Fund invests in the following types of high-quality, 
money market instruments: 
    

  (1) U.S. Government Obligations: Marketable obligations issued or guaranteed 
by the U.S. Government or any agency or instrumentality thereof. 

  (2) Bank Obligations: Obligations (including certificates of deposit and 
bankers' acceptances) of U.S. banks (including their foreign branches) and 
savings and loan associations which at the date of their latest public 
reporting had total assets in excess of $1 billion, and obligations of 
certain smaller banks and savings and loan institutions satisfying specified 
investment criteria (see the Statement of Additional Information for further 
details). 

  (3) Commercial Paper: Commercial paper (short-term unsecured promissory 
notes of corporations, including variable amount master demand notes) which 
at the date of investment is rated A-1 by Standard & Poor's Ratings Group 
("S&P") or P-1 by Moody's Investors Service, Inc. ("Moody's"), or, if not 
rated, is issued by companies having outstanding debt rated AAA or AA by S&P 
or Aaa or Aa by Moody's. 

  The Fund may purchase securities carrying fixed rates of return or having 
floating or variable interest rates. Floating and variable rate obligations 
are generally more stable than fixed-rate obligations because their value is 
less affected by changes in interest rate levels. 

   
  (4) Short-term Corporate Debt Securities: Corporate debt securities (bonds 
and debentures) with no more than 397 days remaining to maturity at date of 
settlement and rated AAA or AA by S&P or Aaa or Aa by Moody's. 
    

Additional Information 

   
  In addition to the foregoing policies, the Fund is subject to certain 
regulatory requirements. The Fund may purchase only securities that PMC 
believes present minimal credit risks and that are rated by the major rating 
agencies, such as S&P and Moody's, within the two highest rating categories 
for short-term debt obligations or, if unrated, are determined to be of 
equivalent quality by PMC. If a security has been assigned different ratings 
by different rating agencies, at least two rating agencies must have assigned 
the highest rating in order for PMC to rely on that highest rating. 
    


                                      4 
<PAGE>
 
   
  The Fund may not invest more than 5% of its total assets (taken at amortized 
cost) in securities issued by or subject to puts from any one issuer (except 
U.S. government securities and repurchase agreements collateralized by such 
securities). The Fund will not invest more than 5% of its total assets in 
securities that, although of high quality, have not been rated in the highest 
short-term rating category by at least two rating agencies (or if rated by 
only one rating agency, by that rating agency or, if unrated, determined to 
be of equivalent quality by PMC), provided that within this 5% limitation, 
the Fund will not invest more than the greater of 1% or $1 million of its 
total assets in the securities (other than U.S. Government securities) of any 
one issuer. 

  The Fund may enter into repurchase agreements with approved banks and 
broker-dealers for periods not to exceed seven days and only with respect to 
U.S. Government securities that throughout the period have a value at least 
equal to the amount of the loan (including accrued interest). 

  The Fund will not invest more than 25% of its assets in any one industry, 
except that there is no percentage limitation on investments in bank 
obligations or U.S. Government obligations. 

  The Fund intends to hold its investments until maturity, but may sell them 
prior to maturity for a number of reasons, including: to shorten or lengthen 
the average maturity; to increase the yield; to maintain the quality of the 
portfolio; or to maintain a stable share value. 

  It is the policy of the Fund not to engage in trading for short-term 
profits. The Fund will engage in portfolio trading if PMC believes that a 
transaction net of costs (including custodian's fees) will contribute to the 
achievement of the Fund's investment objective. 

  The Fund has no present plans to change its policies with regard to the 
types or maturities of securities in which it invests. However, if the Fund 
determines that its investment objective can best be achieved by a change in 
investment policy or strategy, the Fund may make such changes without 
shareholder approval by disclosing them in the Prospectus. The Fund's 
investment objective may not be changed without shareholder approval. 
    

  The investment characteristics of U.S. government obligations, bank 
obligations, commercial paper and repurchase agreements are described in 
greater detail in the Appendix to this Prospectus. The Statement of 
Additional Information also provides more information on the above investment 
strategies, as well as information on additional investment restrictions, 
including those which may not be changed without shareholder approval. 

V. FUND SHARE ALTERNATIVES 

   
  The Fund continuously offers three Classes of shares designated as Class A, 
Class B and Class C shares. If you do not specify in your instructions to the 
Fund which Class of shares you wish to purchase, exchange or redeem, the Fund 
will assume that your instructions apply to Class A shares. See "How to Buy 
Fund Shares" for more information on classes of shares. 

  Class A Shares. Class A shares may be purchased at net asset value without a 
sales charge or commission and are subject to distribution and service fees 
at a combined annual rate of up to 0.15% of the Fund's average daily net 
assets attributable to Class A shares. 

  Class B Shares. If your investment in the Fund is for the long-term, Class A 
shares may be more appropriate than Class B shares. Purchases of the Class B 
shares of the Fund may be appropriate if you plan to exchange these shares 
for the Class B shares of another Pioneer mutual fund (except Pioneer 
Short-Term Income Trust or Pioneer Intermediate Tax-Free Fund, which have 
lower CDSCs for their Class B shares). Please consult your investment 
representative. 
    

  Class B shares are sold without an initial sales charge, but are subject to 
a CDSC of up to 4% if redeemed within six years. Class B shares are subject 
to distribution and service fees at a combined annual rate of 1.00% of the 
Fund'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, eight years after the initial purchase. 

   
  Class C Shares. Class C shares are sold without an initial sales charge, but 
are subject to a 1% CDSC if they are redeemed within the first year after 
purchase. Class C 
    

                                      5 
<PAGE>
 
   
shares are subject to distribution and service fees at a combined annual rate 
of up to 1.00% of the Fund's average daily net assets attributable to Class C 
shares. Your entire investment in Class C shares is available to work for you 
from the time you make your investment, but the higher distribution fee paid 
by Class C shares will cause your Class C shares to have a higher expense 
ratio and to pay lower dividends, to the extent dividends are paid, than 
Class A shares. Class C shares have no conversion feature. 
    

  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 Fund 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 

   
  The purchase and redemption price of the Fund's shares is equal to the net 
asset value ("NAV") per share. The NAV per share of a Class of the Fund is 
determined by dividing the value of its assets, less liabilities (expenses 
and fees are accrued daily) attributable to that Class, by the number of 
shares of that Class outstanding. The Fund's NAV is computed twice daily, on 
each day the New York Stock Exchange (the "Exchange") is open, at 12:00 noon 
Eastern Time and as of the close of regular trading on the Exchange. 

  Securities are valued at amortized cost. Under the amortized cost pricing 
method, a portfolio investment is valued at its cost and, thereafter, any 
discount or premium is amortized to maturity, regardless of the impact of 
fluctuating interest rates on the market value of the investment. Amortized 
cost pricing facilitates the maintenance of a $1.00 constant NAV per share, 
but, of course, this cannot be guaranteed. All assets of the Fund 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 FUND SHARES 

  You may buy Fund shares through broker-dealers who have selling agreements 
with the Trust's distributor, Pioneer Funds Distributor, Inc. (" PFD"). Class 
A shares may also be purchased directly from PFD. Call Pioneering Services 
Corporation ("PSC") at 1-800-225-6292 if you need assistance. 

   
  The minimum initial investment is $1,000 for Class A, Class B and Class C 
shares except as specified below. The minimum initial investment is $50 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 and Class C shares except that the subsequent minimum investment 
amount for Class B share accounts may be as little as $100 if an automatic 
investment plan is established (see "Automatic Investment Plans"). 

  Dividends on Purchases. The Fund seeks to be fully invested at all times in 
order to accrue dividends to your account each day. To be eligible for each 
day's dividend accrual, each direct purchase of shares in the Fund must be 
converted to same day funds. Same day funds are monies credited to State 
Street Bank and Trust Company's ("State Street Bank") account with the 
Federal Reserve Bank of Boston. 

  If your purchase order is received in good order and accepted by the Fund by 
12:00 noon Eastern Time, it will be executed at the NAV next determined after 
your purchase payment is converted into same day funds or other immediately 
available funds and your shares will begin earning dividends that day. If 
your purchase order is received in good order and accepted after 12:00 noon 
Eastern Time and prior to the close of the Exchange (usually, 4:00 p.m. 
Eastern Time), it will be executed at the NAV next determined after your 
purchase payment is converted into same day funds or other immediately 
available funds and your shares will begin earning dividends on the next 
business day. When you purchase shares by check, your shares will begin 
earning dividends when the check is converted into same day funds, normally 
within two business days. 

  On any day that State Street Bank, the Custodian (as defined below) or the 
Exchange closes early, or, in PMC's judgment closing early is in the best 
interest of the Fund's shareholders, the Fund reserves the right to advance 
the time by which transactions (purchases, sales or exchanges) must be 
received in order to be eligible for that day's dividends. 
    


                                      6 
<PAGE>
 
Making Your Investment 

   
  All purchases of Class B and Class C shares, except exchanges from other 
Pioneer mutual funds, can only be processed through broker-dealers who have 
selling agreements with PFD. 

  By Mail. (Class A shares only) Send your check or negotiable bank draft, 
drawn on a U.S. bank and payable in U.S. dollars to the Fund, to PSC at the 
above address. Cash will not be accepted. Your payment should be accompanied 
by a completed Account Application or other instructions indicating your 
account number. 

  If you pay by check or draft, State Street Bank will normally make same day 
funds available to the Fund, and the Fund will accept the order, on the first 
business day after receipt. Checks drawn on some other banks may take more 
than one day to be collected and share purchases will not be made until same 
day funds are available to the Fund. 
    

  By Telephone. Your account is automatically authorized to have the telephone 
purchase privilege unless you indicated otherwise on your Account Application 
or by writing to PSC. The telephone purchase option may be used to purchase 
additional shares for an existing 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. Pioneer will 
electronically debit the amount of each purchase from this predesignated 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. 
    

  By Wire. (Class A shares only) When you wish to wire money to an existing 
Pioneer account, call PSC at 1-800-225-6292 to obtain complete instructions. 
You will be asked to instruct your bank to transmit same day funds by wire 
through the Federal Reserve banking system. The wiring instructions must 
include the following information: 

   
Receiving Bank              State Street Bank and Trust Company 
Address                     225 Franklin Street 
                            Boston MA 02101 
ABA Transit                 011000028 
For Further Credit To       Shareholder Name 
                            Existing Pioneer Account # 
                            Pioneer Cash Reserves Fund 

  Federal funds directed to the Custodian must be pre-approved by calling PSC 
at 1-800-225-6292. To be sure that a bank wire is accepted on the same day it 
is sent, you should give the Fund notice of your intention to make such 
investment as early in the day as possible since the process of making a wire 
transfer may take several hours and may be affected by your bank's internal 
procedures concerning wire transfers. Your bank may charge for sending same 
day funds on your behalf. State Street Bank presently does not charge for 
receipt of wired same day funds, but reserves the right to charge for this 
service in the future. 
    

Selecting a Class of Shares 

   
  Class A Shares. You may buy Class A shares at net asset value without the 
imposition of an initial sales charge by mail, by telephone or by wire as 
described above. 

  Class B Shares. You may buy Class B shares at NAV without the imposition of 
an initial sales charge; however, Class B shares redeemed within six 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 Fund will first redeem shares not subject 
to any CDSC, and 
    


                                      7 
<PAGE>
 
then shares held longest during the six-year period. As a result, you will 
pay the lowest possible CDSC. 

                              CDSC as a Percentage of Dollar 
Year Since Purchase               Amount Subject to CDSC 
- -------------------------    -------------------------------- 
First                                      4.0% 
Second                                     4.0% 
Third                                      3.0% 
Fourth                                     3.0% 
Fifth                                      2.0% 
Sixth                                      1.0% 
Seventh and thereafter                     none 

  Class B shares will automatically convert into Class A shares at the end of 
the calendar quarter that is eight years after the purchase date, except as 
noted below. Class B 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 will be subject to the CDSC applicable to 
the shares of the fund originally purchased. 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 Fund 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 will continue to be in effect at the time any particular conversion 
would occur. The conversion of Class B shares to Class A shares will not 
occur if such ruling 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. 

   
  Class C Shares. You may buy Class C shares at net asset value without the 
imposition of an initial sales charge; however, Class C shares redeemed 
within one year of purchase will be subject to a CDSC of 1.00%. 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. Class C shares do not convert to any other Class of Fund 
shares. 

  For the purpose of determining 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 C shares, the Fund will 
first redeem shares not subject to any CDSC, and then shares held for the 
shortest period of time during the one-year period. As a result, you will pay 
the lowest possible CDSC. 

  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 Fund in connection with the sale of Class C shares, including the payment 
of compensation to broker-dealers. 

  Waiver or Reduction of Contingent Deferred Sales Charge. The CDSC on Class B 
shares 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 Internal Revenue Code of 1986, as amended (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 Fund at the time the 
withdrawal plan is established). 

  The CDSC on Class B shares 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 70-1/2 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 con- 
    


                                      8 
<PAGE>
 
tributions 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 Fund 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 C shares and on any Class A shares subject to a CDSC may 
be waived or reduced as follows: (a) for automatic redemptions as described 
in "Systematic Withdrawal Plans" (limited to 10% of the value of the 
account); (b) if 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 shareowner or participant in 
an employer-sponsored retirement plan; (c) if the distribution 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 (d) if the distribution is to a participant in an 
employer-sponsored retirement plan and is (i) a return of excess employee 
deferrals or contributions, (ii) a qualifying hardship distribution as 
defined by the Code, (iii) from a termination of employment, (iv) in the form 
of a loan to a participant in a plan which permits loans, or (v) 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 company; or (b) the 
redemption is made pursuant to each Fund's right to liquidate or 
involuntarily redeem shares in a shareholder's account. 

   
  Broker-Dealers. Class B and Class C shares may only be purchased through a 
securities broker or dealer. You may purchase Class A shares of either Fund 
through a securities broker or dealer or directly from PFD. A broker or 
dealer may charge for this service. If you do not have a securities broker or 
dealer, PSC can refer you to one. 

  An order for any Class of Fund shares received by PFD from a broker-dealer 
prior to either 12:00 noon Eastern Time or the close of regular trading on 
the Exchange is confirmed at the price appropriate for that Class next 
determined after the order is received. It is the responsibility of 
broker-dealers to transmit orders so that they will be received by PFD prior 
to either 12:00 noon Eastern Time or its close of business (usually 5:30 p.m. 
Eastern Time). 

  General. The Fund reserves the right in its sole discretion to withdraw all 
or any part of the offering of shares when, in the judgment of the Fund's 
management, such withdrawal is in the best interest of the Fund. 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. 

  Conditions of Purchase. The Fund reserves the right to reject any purchase 
or exchange. If a purchase is canceled because your check is returned unpaid, 
you are responsible for any loss the Fund incurs and a separate charge may be 
made for any unpaid check. The Fund may redeem shares from your account(s) to 
cover these costs and charges and you may be restricted from making future 
purchases of shares of any of the Pioneer mutual funds. 
    

VIII. HOW TO SELL FUND SHARES 

  You can arrange to sell (redeem) Fund shares on any day the Exchange is open 
by selling either some or all of your shares to the Fund by mail, by 
telephone or by facsimile ("fax"). Class A share accounts may also sell by 
check when properly authorized in advance. 

  You may sell your shares either through your broker-dealer or directly to 
the Fund. Please note the following: 


                                      9 
<PAGE>
 
   
(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 (expected to 
be a constant $1.00) after your order is received in good order, less any 
applicable CDSC. Subject to the limitation described above for shares 
purchased by check, sale proceeds are normally mailed or wired the next 
business day but in any event not later than seven days after your order is 
received in good order. The Fund reserves the right to withhold payment of 
the sale proceeds until checks received by the Fund in payment for the shares 
being sold have cleared, which may take up to 15 calendar days from the 
purchase date. 

   By Check. (Class A Shares Only) If requested, the Fund will establish a 
checking account for a Class A shareholder(s) with The First National Bank of 
Omaha (the "First National Bank"). Please allow 1 to 2 weeks for receipt of 
your supply of personalized checks. Checks may be drawn for not less than 
$500 nor more than $250,000, payable to anyone. When a check is presented to 
First National Bank for payment, it will cause the Fund to redeem at the net 
asset value next determined a sufficient number of the shareholder's shares 
to cover the check. A shareholder receives the daily dividends declared on 
his or her shares until the day the check clears. 

   The checking account is subject to First National Bank's rules and 
regulations governing checking accounts. If there is an insufficient number 
of shares in a shareholder's account when a check is presented to First 
National Bank for payment, the check will be returned. Since the aggregate 
value of a shareholder's account in the Fund changes each day because of the 
daily dividend, a shareholder should not attempt to withdraw the full amount 
in his or her account by using a check. The checkwriting privilege is not 
available for Class B share accounts. In addition, checkwriting is generally 
not available for retirement plan accounts or accounts subject to backup 
withholding (see "Dividends, Distributions and Tax Status" and "Voluntary Tax 
Withholding"). 
    

   In Writing. You may sell your shares by delivering a written request 
signed by all registered owners and in good order to PSC, at P.O. Box 9014 
Boston, MA 02205-9014, 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 Fund'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, Pioneer 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 accepted until they are received in good 
order by PSC. Good order means that there are no outstanding claims or 
requests to hold redemptions on the account, certificates, if any, 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 fax. The Fund may waive 
the signature guarantee requirement for redemption requests of $50,000 or 
less provided that the redemption proceeds are directed to the shareholder(s) 
of record at the address of record. 
    

   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 the PSC. You may redeem up to $50,000 of 
your shares by telephone or fax and receive the proceeds by check or bank 
wire or electronic funds transfer. The redemption proceeds must be made 
payable exactly as the account is registered. To receive the proceeds by 
check: the check must be sent to the address of 

                                      10 
<PAGE>
 
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. The telephone redemption 
option is not available to retirement plan accounts. 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. 

   
   A redemption order received by telephone or fax in proper form by PMC 
before 12:00 noon Eastern Time on any business day becomes effective as of 
12:00 noon that day, and shares so redeemed will not receive that day's 
dividend. A redemption order received by telephone or fax in proper form by 
PSC after 12:00 noon Eastern Time and prior to the close of the Exchange 
(usually, 4:00 p.m. Eastern Time) on any business day becomes effective as of 
4:00 p.m. that day, and shares so redeemed will receive that day's dividend. 
In either case, proceeds of such a redemption will normally be mailed or 
wired the next business day. State Street Bank charges a fee for wiring 
funds; the fee will be deducted from the amount redeemed. 

   Selling Shares Through Your Broker-Dealer. The Fund has authorized PFD to 
act as its agent in the repurchase of shares of the Fund from qualified 
broker-dealers and reserves the right to terminate this procedure at any 
time. Your broker-dealer must receive your request and transmit it to PFD 
either by 12:00 noon Eastern Time or before PFD's close of business to 
receive the next determined 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 Fund in an account with a net asset value of less than the minimum 
required amount due to redemptions or exchanges, the Fund 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 Fund to you of the Fund's intention to redeem the 
shares. 

   General. The Fund and First National Bank each reserve the right at any 
time to terminate, suspend or change the terms of or impose fees on any 
redemption method described in this Prospectus, except redemption by mail. 
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 Fund of securities owned by it is not reasonably practicable or it is 
not reasonably practicable for the Fund to fairly determine the value of the 
net assets of its portfolio; or the SEC, by order, so permits. 
    

IX. HOW TO EXCHANGE FUND 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 
Pioneer mutual fund out of which you wish to exchange and the name of the 
Pioneer mutual 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 the Fund. 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. 
    


                                      11 
<PAGE>
 
   
  General. Exchanges must be at least $1,000. Shares of the Fund acquired 
through an exchange from another Pioneer mutual fund or through reinvestment 
of dividends or capital gains distributions, may be exchanged at net asset 
value for the same class of shares in any other Pioneer mutual fund. Shares 
of the Fund acquired by direct purchase may be exchanged for the same class 
of any other Pioneer mutual fund at net asset value plus any applicable sales 
charge. Not all Pioneer mutual funds offer more than one Class of shares. 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 the 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 12:00 noon Eastern Time will be 
effective at 12:00 noon if the requirements above have been met and they will 
not be eligible for that day's dividend. Exchange requests received by PSC 
after 12:00 noon and before 4:00 p.m. Eastern Time will be effective at 4:00 
p.m. if the requirements above have been met and they will be eligible for 
that day's dividend. PSC will process exchanges only after receiving an 
exchange request in good order. There are currently no fees or sales charges, 
other than those described above, 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 Fund 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. For the protection of the Fund's performance and 
shareholders, the Fund 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 Fund's portfolio management 
strategy or its operations. In addition, the Fund 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, on behalf of the Fund, has adopted a Plan of Distribution for 
each Class of shares (the "Class A Plan," "Class B Plan," and "Class C Plan") 
in accordance with Rule 12b-1 under the Investment Company Act of 1940, as 
amended (the "1940 Act"), pursuant to which certain distribution and service 
fees are paid. 

  Pursuant to the Class A Plan, the Fund reimburses PFD 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 of Trustees has approved the following categories of expenses for 
Class A shares of the Fund: (i) a service fee to be paid to qualified 
broker-dealers in an amount not to exceed 0.15% per annum of the Fund's 
average daily net assets attributable to Class A shares and (ii) 
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. 
    


                                      12 
<PAGE>
 
   
  Expenditures of the Fund pursuant to the Class A Plan are accrued daily and 
may not exceed 0.15% of the Fund'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 Fund 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 Fund. 

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

  Commissions of 4%, equal to 3.75% 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 therefore, PFD may retain the 
service fee paid by the Fund 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. 
Commissions of up to 1% of the amount invested in Class C shares, consisting 
of 0.75% of the amount invested and a first year's service fee of 0.25% of 
the amount invested, 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 therefore, 
PFD may retain the service fee paid by the Fund with respect to such shares 
for the first year after purchase. Commencing in the 13th month following the 
purchase of Class C shares, dealers will become eligible for additional 
annual distribution fees and service fees of up to 0.75% and 0.25%, 
respectively, of the net asset value of such shares. 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 or Class C 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 Fund 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 Fund 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 Fund 
intends to make distributions in a timely manner and accordingly does not 
expect to be subject to the excise tax. 

  At 4:00 p.m. Eastern Time each business day, the Fund will declare 
substantially all of its net investment income (consisting of earned interest 
income less expenses) as a dividend to its shareholders of record as of 12:00 
noon Eastern Time. Shareholders begin earning dividends on the first business 
day after the Fund is credited with same day funds. However, investors whose 
payments are wired to and received by the Trust's Custodian in federal funds 
by 12:00 noon, Eastern Time, will receive the dividend declared that day. 
Unless you specify otherwise on your Account Application, all distributions 
will be automatically reinvested in additional full and fractional shares of 
the same class of the Fund. 

  Each month's distributions from net investment income will be paid on the 
last business day of the month. Short-term capital gains distributions, if 
any, may be paid with the daily dividend. For federal income tax purposes, 
all distributions will normally be taxable to the Fund's shareholders as 
ordinary income, whether taken in cash or reinvested in shares. Dividends and 
capital gains distributions may also be made at such times as may be 
necessary to avoid federal income or excise tax under the Code. 

  Taxable dividends and other taxable distributions which are paid to 
individuals and other non-exempt payees will be subject to 31% backup 
withholding of federal income tax if the Fund is not provided with the 
    


                                      13 
<PAGE>
 
shareholder's correct taxpayer identification number and certification that 
the number is correct and that the shareholder is not subject to backup 
withholding or the Fund receives notice from the IRS or a broker that 
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, estates and trusts and who are subject to 
U.S. federal income tax. In many states, the portion of the dividends paid by 
the Fund that is attributable to the interest received from certain U.S. 
government obligations will be exempt from state income taxation. A state 
and/or local intangible property tax exemption may also be available to the 
extent the value of the Fund's assets is attributable to such U.S. government 
obligations. In some cases, state tax rules may condition these exemptions on 
certain concentration, designation, reporting or other requirements, and the 
Fund will not necessarily satisfy all such requirements in all states. 
Non-U.S. shareholders and tax-exempt shareholders are subject to different 
tax treatment that is not described above. You should consult your own tax 
adviser regarding applicable state, local and other tax laws. Information as 
to the federal tax status of distributions will be provided to shareholders 
annually. 
    

XII. MANAGEMENT OF THE TRUST 

   
  The Trust's Board of Trustees has overall responsibility for management and 
supervision of the Fund. There are currently eight Trustees of the Trust, six 
of whom are not "interested persons" of the Trust as defined in the 1940 Act. 
The Board meets at least quarterly. By virtue of the functions performed by 
PMC, 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 background of each 
Trustee and executive officer of the Trust. 

  The Fund is managed under a contract with PMC. PMC serves as investment 
adviser to the Fund and is responsible for the overall management of the 
Fund's business affairs, subject to the authority of the Board of Trustees. 
PMC is a wholly-owned subsidiary of The Pioneer Group, Inc. ("PGI"), a 
Delaware corporation. 

  In addition to the Fund, 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 PGI'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 Fund. PMC pays all the expenses, including 
executive salaries and the rental of certain office space, related to its 
services for the Trust, with the exception of the following which are paid by 
the Trust: (a) charges and expenses for fund accounting, pricing and 
appraisal services and related overhead, including, to the extent such 
services are performed by personnel of PMC or its affiliates, office space 
and facilities and personnel compensation, training and benefits; (b) the 
charges and expenses of auditors; (c) the charges and expenses of any 
custodian, transfer agent, plan agent, dividend disbursing agent and 
registrar appointed by the Trust with respect to the Fund; (d) issue and 
transfer taxes, chargeable to the Fund in connection with securities 
transactions to which the Fund is a party; (e) insurance premiums, interest 
charges, dues and fees for membership in trade associations, and all taxes 
and corporate fees payable by the Fund to federal, state or other 
governmental agencies; (f) fees and expenses involved in registering and 
maintaining registrations of the Fund and/or its shares with the SEC, 
individual states or blue sky securities agencies, territories and foreign 
countries, including the preparation of Prospectuses and Statements of 
Additional Information for filing with regulatory agencies; (g) all expenses 
of shareholders' and Trustees' meetings and of preparing, printing and 
distributing prospectuses, notices, proxy statements and all reports to 
shareholders and to governmental agencies; (h) charges and expenses of legal 
counsel to the Trust and the Trustees; (i) distribution fees paid by the Fund 
in accordance with Rule 12b-1 promulgated by the SEC pursuant to the 1940 
Act; (j) compensation of those Trustees of the Trust who are not affiliated 
with or interested persons of PMC, the Trust (other than as Trustees), PGI or 
PFD; (k) the cost of preparing and printing share certificates; and (l) 
interest on borrowed money, if any. In addition to the expenses described 
above, the Trust shall pay all brokers' and underwriting commissions 
chargeable to the Trust in connection with securities transactions to which 
the Fund is a party. 

  Orders for the Fund's portfolio securities transactions are placed by PMC, 
which strives to obtain the best price and 
    


                                      14 
<PAGE>
 
   
execution for each transaction. In circumstances where 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 the Fund or other Pioneer 
mutual funds. 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 0.40% per annum of the 
Fund's average daily net assets. The fee is normally computed daily and paid 
monthly. PMC has voluntarily and temporarily agreed to reduce its management 
fees for the Fund and to make other arrangements as may be necessary to keep 
such expenses below specified levels. See "Expense Information." 

  During the fiscal year ended December 31, 1995, Pioneer Cash Reserves Fund 
incurred actual expenses of $1,996,132 before management fees, paid or 
payable to PMC, and other expenses were reduced pursuant to PMC's voluntary 
expense limitation agreement in effect through December 31, 1995, as 
described further in the Statement of Additional Information. 

  John F. Cogan, Jr., Chairman of the Board and President of the Trust and 
President and a Director of PGI and of PMC, owned approximately 14% of the 
outstanding capital stock of PGI as of the date of this Prospectus. PMC is a 
wholly-owned subsidiary of PGI. PFD is an indirect wholly-owned subsidiary of 
PGI. 
    

XIII. DESCRIPTION OF SHARES AND VOTING RIGHTS 

   
  The shares of the Trust are divided into two series: the Fund and Pioneer 
U.S. Government Money Fund. Each share represents an equal proportionate 
interest in a Fund with each other share. The Trust reserves the right to 
create and issue additional series of shares in addition to the Funds 
currently available. The shares of a series participate equally in the 
earnings, dividends and assets of the particular series, except to the extent 
the rights of a particular class of shares may differ from those of another 
class or classes. As of the date of this Prospectus, the Trustees have 
authorized the issuance of a single class of shares for Pioneer U.S. 
Government Money Fund and three classes of shares, designated Class A, Class 
B and Class C, for Pioneer Cash Reserves Fund. The shares of each class 
represent an interest in the same portfolio of investments of the Fund. 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, Class B and Class C 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. 
    

  The Trust is not required, and does not intend, to hold annual shareholder 
meetings although special meetings may be called for the purpose of electing 
or removing Trustees, changing fundamental investment restrictions or 
approving a management contract. 

  Generally, shares of each Fund will vote as a single series on matters that 
affect all Funds in substantially the same manner. As to matters affecting 
each Fund (e.g., changes in a Fund's investment restrictions), shares of each 
Fund will vote as a separate series. Shares have no preemptive, subscription, 
or conversion rights and are freely transferable. Shareholders are entitled 
to one vote for each share held and may vote in the election of Trustees and 
on other matters submitted to shareholders. Shares are fully-paid and, except 
as set forth in the Statement of Additional Information, non-assessable. 

  Upon liquidation of the Trust, each Fund's shareholders will receive pro 
rata, subject to the rights of creditors, (a) the proceeds of the sale of the 
assets held in the respective series to which the shares of the Fund relate, 
less (b) the liabilities of the Trust attributable to the respective series. 
Shares will remain on deposit with the Trust's transfer agent and 
certificates will not be issued. 

XIV. 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. 
Inquiries to PSC should be mailed to Shareholder Services, 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. The principal address of the Mutual Fund 
division of the Custodian is 40 Water Street, Boston, Massachusetts 02109. 

                                      15 
<PAGE>
 
Account and Confirmation Statements 

  PSC maintains accounts for shareholders and all transactions are recorded in 
these accounts. Confirmation statements showing the details of transactions 
are sent to shareholders monthly. The Pioneer Combined Account Statement, 
mailed quarterly, is available to all shareholders who have more than one 
Pioneer account. The bottom portion of the confirmation statement should be 
used as a remittance slip to make additional investments or to indicate a 
change of address on your account. 

  Shareholders whose shares are held in the name of an investment 
broker-dealer or other party will not normally have an account with the Fund 
and might not be able to utilize some of the services available to 
shareholders of record. Examples of services which 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 
(minimum of $100 for Class A shares and $500 for Class B and Class C 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 Fund 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 $100 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 
draft drawn on a checking account. Pioneer Investomatic Plan investments are 
voluntary, and you may discontinue the plan at any time without penalty upon 
30 days' written notice to PSC. PSC acts as agent for the purchaser, the 
broker-dealer and PFD in maintaining these plans. 

Financial Reports and Tax Information 

   
  Shareholders will receive financial reports semi-annually. Each annual 
report will be audited by the Trust's independent public accountants. In 
January of each year, the Fund will mail to shareholders information about 
the tax status of dividends and distributions. 
    

Dividend Options

   
 Regular Reinvestment. Dividends are automatically reinvested in additional 
shares of the same class of the Fund in which you maintain an investment 
unless you instruct otherwise. 
    

   Check. You may elect (in writing) to receive monthly dividend checks. You 
  may also direct that dividend checks be paid to another person or sent to 
  another address (other than the one on file for your account), although if 
  you make either designation after you have opened your account, a signature 
  guarantee signed by all registered account owners must accompany your 
  instructions. 

   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 
  account of the same class. 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 
  Systematic 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 gains distributions paid from your account (before any reinvestment) 
and forward the amount withheld to the IRS as a credit against your federal 
income taxes. This option is not available for retirement plan accounts or 
for accounts subject to backup withholding. 

Retirement Plans 

  Interested persons should contact the Retirement Plans Department of PSC at 
1-800-622-0176 for information relating to Pioneer's retirement plans for 
businesses, Simplified Employee Pension Plans, IRAs, Section 401(k) 

                                      16 
<PAGE>
 
   
salary reduction plans and Section 403(b) retirement plans for employees of 
associations, public school systems and charities. The Account Application 
accompanying this Prospectus should not be used to establish such plans. 
Separate applications are required. 
    

Yield Information 

   
  Yield information may be obtained by telephone 1-800-225-4321. Yield 
information is updated each weekday and is based on the annualized yield over 
the immediately preceding seven days, determined with a formula established 
by the SEC. See "Investment Results" below. Yields are not fixed and will 
vary with changes in the income and expenses of the Fund. 
    

Telecommunications Device for the Deaf (TDD) 

  If you have a hearing disability and you 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 providing for fixed payments at regular intervals. 
Withdrawals from Class B and Class C 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 monthly or quarterly. You may also 
direct that withdrawal checks be paid to another person, although if you make 
this designation after you have opened your account, a signature guarantee 
must accompany your instructions. 
    

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

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 Fund shares by telephone. 
For personal assistance, call 1-800-225-6292 between 8:00 a.m. and 9:00 p.m. 
Eastern time on weekdays. See "Share Price," "How to Sell Fund Shares," and 
"How to Exchange Fund Shares" for more information. Computer-assisted 
transactions may be available to shareholders who have pre-recorded certain 
bank information (see "FactFoneSM"). 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, each Fund 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 Fund may be liable for any loss due to 
unauthorized or fraudulent instructions. The Fund may implement other 
procedures from time to time. In all other cases, neither the Fund, 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 Fund 
by telephone to institute a redemption or exchange. You should communicate 
with the Fund in writing if you are unable to reach the Fund 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 other third party may not be able to use FactFone(SM). See 
"How to Buy Fund Shares," "How to Exchange Fund Shares," "How to Sell Fund 
Shares" and "Telephone Transactions and Related Liabilities." Call PSC for 
assistance. 
    

XV. INVESTMENT RESULTS 

   
  From time to time, the Fund may include in advertisements or other 
communications to existing or proposed 
    


                                      17 
<PAGE>
 
   
shareholders its respective "yield" and "effective yield." The "yield" is 
computed by dividing the Fund's net investment income per share attributable 
to the appropriate class during a base period of seven days (which period 
will be stated in the communication) by the net asset value per share for the 
appropriate class of the Fund on the last day of such seven-day period. The 
Fund's net investment income per share is determined by dividing net 
investment income during the base period by the average number of shares for 
the appropriate class of the Fund entitled to receive dividends during the 
base period. The Fund's seven-day yield for the appropriate class is then 
annualized by a computation that assumes that the Fund's net investment 
income is earned for a one-year period at the same rate as during the 
seven-day base period. The "effective yield" is calculated similarly, except 
that income is assumed to be reinvested. The "effective yield" will be 
slightly higher than the "yield" because of the compounding effect of the 
assumed reinvestment. 

  The yield of the Fund will vary from time to time depending on market 
conditions, the composition of the Fund's portfolio and operating expenses. 
The temporary policy of the Fund's investment adviser to reduce management 
fees and limit expenses will, so long as such policy is in effect, have the 
effect of increasing yield. These factors and possible differences in the 
methods used in calculating yields should be considered when comparing 
performance information published for other investment companies and other 
investment vehicles. Yield quotations should also be considered relative to 
the risks associated with the Fund's investment objective and policies. At 
any time in the future, yield quotations may be higher or lower than past 
yield quotations, and there can be no assurance that any historical yield 
quotation will continue in the future. 

  The Fund may also include comparative performance information in advertising 
or marketing their shares. This performance information may include data from 
Lipper Analytical Services, Inc., Donoghue's Money Fund Report or other 
industry publications. 
    

  For more information regarding the computation of yield, see the Statement 
of Additional Information. 

XVI. APPENDIX 

  Some of the terms used in this Prospectus are described below. 

   
  "Bank Obligations" include certificates of deposit which are negotiable 
certificates evidencing the indebtedness of a commercial bank to repay funds 
deposited with it for a definite period of time (usually from 14 days to one 
year) at a stated interest rate. Bankers' acceptances are credit instruments 
evidencing the obligation of a bank to pay a draft which has been drawn on it 
by a customer. These instruments reflect the obligation both of the bank and 
of the drawer to pay the face amount of the instrument upon maturity. Time 
deposits are non-negotiable deposits maintained in a banking institution for 
a specified period of time. The Fund generally purchases time deposits with a 
maturity of the following business day. Time deposits with a maturity of two 
business days or more will be considered to be illiquid for purposes of the 
Fund's investment restrictions. 

  "Commercial Paper" consists of short-term (usually from 1 to 270 days) 
unsecured promissory notes issued by corporations in order to finance their 
current operations. The Fund may invest only in commercial paper rated A-1 by 
S&P or P-1 by Moody's. The ratings A-1 and P-1 are the highest commercial 
paper ratings assigned by S&P and Moody's. Commercial paper which is not 
rated is not necessarily of lower quality than that which is rated, but may 
be less marketable and therefore provide a higher yield. 
    

  "Money Market" refers to the marketplace composed of the financial 
institutions which handle the purchase and sale of liquid, short-term, 
high-grade debt instruments. The money market is not a single entity, but 
consists of numerous separate markets, each of which deals in a different 
type of short-term debt instrument. These include U.S. government 
obligations, commercial paper, bank obligations, municipal securities, and 
other debt instruments, generally referred to as money market instruments. 

   
  "Repurchase Agreements" are transactions by which the Fund purchases a 
security and simultaneously commits to resell that security to the seller at 
an agreed upon price on an agreed upon date within a number of days (usually 
not more than seven) from the date of purchase. The resale price reflects the 
purchase price plus an agreed upon market rate of interest which is unrelated 
to the coupon rate or maturity of the purchased security. A repurchase 
agreement involves the obligation of the seller to pay the agreed upon price, 
which obligation is in effect secured by the value (at least equal to the 
amount of the agreed upon resale price and marked to market daily) of the 
underlying security. Whether a repurchase agreement is the purchase and sale 
of a security or a collateralized loan has not been 
    


                                      18 
<PAGE>
 
   
definitely established for purposes other than the application of the federal 
statutory provisions exempting U.S. government obligations from state 
taxation (for which purpose a repurchase agreement is treated as a 
collateralized loan). This might become an issue in the event of the 
bankruptcy of the other party to the transaction. While it is not possible to 
eliminate all risk from these transactions (particularly the possibility of a 
decline in the market value of the underlying securities, as well as delay 
and costs to the Fund in connection with bankruptcy proceedings), it is the 
policy of the Trust to enter into repurchase agreements only with banks and 
broker dealers approved by the Board of Trustees of the Trust and only with 
respect to U.S. government securities which throughout the period have a 
value at least equal to the amount of the loan (including accrued interest). 
It is also the policy of the Board of Trustees to evaluate on a periodic 
basis the creditworthiness of the parties with which the Fund engages in 
repurchase agreements. 
    

  "U.S. Government Obligations" are debt securities (including bills, notes, 
and bonds) issued by the U.S. Treasury or issued by an agency or 
instrumentality of the U.S. government which is established under the 
authority of an Act of Congress. Such agencies or instrumentalities include, 
but are not limited to, the Federal National Mortgage Association, the Small 
Business Administration, the Government National Mortgage Association, and 
the Federal Home Loan Banks. Although all obligations of agencies and 
instrumentalities are not direct obligations of the U.S. Treasury, payment of 
the interest and principal on these obligations is generally backed directly 
or indirectly by the U.S. government. This support can range from the backing 
of the full faith and credit of the United States (U.S. Treasury securities 
and, for example, securities issued by the Small Business Administration and 
the Government National Mortgage Association) to the backing solely of the 
issuing instrumentality itself (securities issued by the Federal National 
Mortgage Association and the Federal Home Loan Banks). In the case of 
obligations not backed by the full faith and credit of the United States, the 
Trust must look principally to the agency issuing or guaranteeing the 
obligation for ultimate repayment and may not be able to assert a claim 
against the United States itself in the event the agency or instrumentality 
does not meet its commitments. 

                                      19 
<PAGE>
 
   
Pioneer Cash Reserves Fund 
60 State Street 
Boston, Massachusetts 02109 
    

OFFICERS 
JOHN F. COGAN, JR., Chairman and President 
DAVID D. TRIPPLE, Executive Vice President 
SHERMAN B. RUSS, Vice President 
WILLIAM H. KEOUGH, Treasurer 
JOSEPH P. BARRI, Secretary 

INVESTMENT ADVISER 
PIONEERING MANAGEMENT CORPORATION 

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 and new accounts, prospectuses, 
 applications, service forms and 
 FactFone(SM) telephone transactions........................... 1-800-225-6292 
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 

   
0496-3260 
(C)Pioneer Funds Distributor, Inc. 
    

                                                                [Pioneer logo] 

Pioneer 
Cash Reserves 
Fund 

   
Class A, Class B and Class C Shares 
Prospectus 
April 29, 1996 
    
                                                                [Pioneer logo] 

   
Pioneer 
U.S. Government 
Money Fund 

Prospectus 
April 29, 1996 

   Pioneer U.S. Government Money Fund is closed to new shareholders. The Fund 
is expected to be acquired by Pioneer Cash Reserves Fund on or about July 1, 
1996 pursuant to an agreement and plan of reorganization approved by the 
Fund's Trustees. As part of the acquisition, Pioneer U.S. Government Money 
Fund will cease operations and its shareholders will become shareholders of 
Pioneer Cash Reserves Fund. See "The Trust" for more information. 

   Pioneer U.S. Government Money Fund (the "Fund") is a money market fund. 
The Fund's shares are offered without a sales charge. The Fund's investment 
objective is to provide high current income, preservation of capital and 
liquidity through investments in high-quality short-term securities. The Fund 
invests exclusively in securities issued or guaranteed as to principal and 
interest by the United States government, the interest on which is generally 
exempt from state income tax. 

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

   The Fund's yield will fluctuate. Shares in the Fund are not deposits or 
obligations of, or guaranteed or endorsed by, any bank, and the shares are 
not federally insured by the Federal Deposit Insurance Corporation, the 
Federal Reserve Board or any other agency. INVESTMENTS IN THE FUND ARE 
NEITHER INSURED NOR GUARANTEED BY THE UNITED STATES GOVERNMENT. THERE CAN BE 
NO ASSURANCE THAT THE FUND WILL BE ABLE TO MAINTAIN A STABLE NET ASSET VALUE 
OF $1.00 PER SHARE. 

            TABLE OF CONTENTS                                     PAGE 
- --------     -------------------------------------------------   ------- 
I.           EXPENSE INFORMATION                                    2 
II.          FINANCIAL HIGHLIGHTS                                   2 
III.         THE TRUST                                              3 
IV.          INVESTMENT OBJECTIVE AND POLICIES                      3 
              Suitability                                           4 
              Investment Policies                                   4 
              Additional Information                                4 
V.           FUND SHARES                                            5 
VI.          SHARE PRICE                                            5 
VII.         HOW TO BUY FUND SHARES                                 5 
VIII.        HOW TO SELL FUND SHARES                                7 
IX.          HOW TO EXCHANGE FUND SHARES                            9 
X.           DISTRIBUTION PLANS                                    10 
XI.          DIVIDENDS, DISTRIBUTIONS AND TAXATION                 10 
XII.         MANAGEMENT OF THE TRUST                               11 
XIII.        DESCRIPTION OF SHARES AND VOTING RIGHTS               12 
XIV.         SHAREHOLDER SERVICES                                  13 
              Account and Confirmation Statements                  13 
              Additional Investments                               13 
              Automatic Investment Plans                           13 
              Financial Reports and Tax Information                13 
              Dividend Options                                     13 
              Voluntary Tax Withholding                            14 
              Retirement Plans                                     14 
              Yield Information                                    14 
              Telecommunications Device for the Deaf (TDD)         14 
              Systematic Withdrawal Plans                          14 
              Telephone Transactions and Related Liabilities       14 
              FactFone(SM)                                         15 
XV.          INVESTMENT RESULTS                                    15 
XVI.         APPENDIX                                              15 
    

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 Fund. The table reflects annual operating expenses based upon actual 
expenses for the fiscal year ended December 31, 1995, expressed as a 
percentage of the average net assets of the Fund. 

 Shareholder Transaction Expenses: 
Maximum Initial Sales Charge on Purchases 
  (as a percentage of offering price)             None 
Maximum Sales Charge on Reinvestment of 
  Dividends                                       None 
Redemption Fee(1)                                 None 
Exchange Fee                                      None 
Annual Operating Expenses 
 (as a percentage of average net assets): 
Management Fee (after fee reduction)(2)           0.00% 
12b-1 Fees                                        0.12% 
Other Expenses (including transfer agent 
  fee, custodian fees and accounting and 
  printing expenses) 
  (after expense reduction)(2)                    0.73% 
Total Operating Expenses 
  (after fee and expense reduction)(2)            0.85% 
                                                  ====== 
    

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

   
(2) Effective April 1, 1995, Pioneering Management Corporation ("PMC"), the 
    Fund's investment adviser, agreed not to impose all or a portion of its 
    management fee and to make other arrangements, if necessary, to limit the 
    operating expenses of the Fund to 0.85% of its average daily net assets. 
    This agreement is voluntary and temporary and may be revised or 
    terminated at any time. 
Expenses Absent Fee Reduction 
Management Fee                  0.40% 
Other Expenses                  0.84% 
Total Operating Expenses        1.36% 

 Example: 

  You would pay the following expenses on a $1,000 investment, assuming a 5% 
annual return and constant expenses, with or without redemption at the end of 
each time period: 
  1 Year       3 Years     5 Years     10 Years 
    $9           $27         $47         $105 

    
  The example above assumes reinvestment of all dividends and distributions 
and that the percentage amounts listed under "Annual Operating Expenses" 
remain the same each year. 

  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. 
   

  A sales charge may be applied to exchanges of shares of the Fund for shares 
of certain other Pioneer mutual funds. See "How to Exchange Fund Shares." The 
payment of Rule 12b-1 fees by the Fund may result in long-term shareholders 
of the Fund 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"). 

  For further information regarding management fees, 12b-1 fees and other 
expenses of the Fund, including information regarding the basis upon which 
management fees and 12b-1 fees are paid, see "Management of the Trust," 
"Distribution Plan" and "How To Buy Fund Shares" in this Prospectus and 
"Management of the Trust" and "Distribution Plan" in the Statement of 
Additional Information. 

II. FINANCIAL HIGHLIGHTS 

  The following information has been derived from financial statements of the 
Fund which have been audited by Arthur Andersen LLP, independent public 
accountants. Arthur Andersen LLP's report on the Trust's (as defined in "The 
Trust") financial statements as of December 31, 1995, appears in the Trust's 
Annual Report which is incorporated by reference into the Statement of 
Additional Information. The information listed below should be read in 
conjunction with the financial statements contained in the Trust's Annual 
Report. 
    

                                      2 
<PAGE>
 
   
Pioneer U.S. Government Money Fund 
Selected Data for each Share Outstanding For the Periods Presented 

<TABLE>
<CAPTION>
                                             For the Year Ended December 31, 
                                          -------------------------------------- 
                                           1995      1994      1993       1992 
                                           ------    ------    ------   -------- 
<S>                                      <C>       <C>       <C>        <C>
Net asset value, beginning of period       $1.00     $1.00     $1.00      $1.00 
                                            ----      ----      ----      ------ 
Income from investment operations: 
Net investment income                      $0.05     $0.04     $0.03      $0.03 
Distributions to shareholders from: 
Net investment income                      (0.05)    (0.04)    (0.03)     (0.03) 
                                            ----      ----      ----      ------ 
Net increase in net asset value            $0.00     $0.00     $0.00      $0.00 
                                            ----      ----      ----      ------ 
Net asset value, end of period             $1.00     $1.00     $1.00      $1.00 
                                            ====      ====      ====      ====== 
Total return*                               5.16%     3.65%     2.63%      3.19% 
Ratio of net operating expenses to 
  average net assets                        0.86%+    0.63%     0.55%      0.59% 
Ratio of net investment income to 
  average net assets                        4.96%+    3.64%     2.61%      3.15% 
Net assets end of period 
 (in thousands)                          $28,312   $29,101   $23,875    $23,619 
Ratios assuming no reduction of fees 
  or expenses: 
Net operating expenses                      1.36%     1.08%     1.37%      1.24% 
Net investment income                       4.46%     3.19%     1.79%      2.50% 
Net investment income                       5.03% 
Ratios assuming a reduction of fees 
  and expenses by PMC and a reduction 
  for fees paid indirectly: 
Net operating expenses                      0.79% 
Net investment income                       5.03% 
</TABLE>

<TABLE>
<CAPTION>
                                                  For the Year Ended December 31, 
                                           ---------------------------------------------- 
                                                                            April 11,   
                                                                             1988 to    
                                                                          December 31,  
                                            1991      1990      1989          1988
                                            ----      ----      ----     --------------- 
<S>                                      <C>       <C>       <C>             <C>
Net asset value, beginning of period       $1.00     $1.00     $1.00          $1.00 
                                            ----      ----      ----     --------------- 
Income from investment operations: 
Net investment income                      $0.05     $0.07     $0.08          $0.05 
Distributions to shareholders from: 
Net investment income                      (0.05)    (0.07)    (0.08)         (0.05) 
                                            ----      ----      ----     --------------- 
Net increase in net asset value            $0.00     $0.00     $0.00          $0.00 
                                            ----      ----      ----     --------------- 
Net asset value, end of period             $1.00     $1.00     $1.00          $1.00 
                                            ====      ====      ====     =============== 
Total return*                               5.41%     7.61%     8.80%          5.34% 
Ratio of net operating expenses to 
  average net assets                        0.60%     0.60%     0.53%          0.50%** 
Ratio of net investment income to 
  average net assets                        5.29%     7.37%     8.37%          7.52%** 
Net assets end of period 
 (in thousands)                          $28,373   $27,828   $20,508         $9,503 
Ratios assuming no reduction of fees 
  or expenses: 
Net operating expenses                      1.08%     0.80%     1.12%          1.13%** 
Net investment income                       4.81%     7.17%     7.77%          6.88%** 
</TABLE>

 * Assumes initial investment at net asset value at the beginning of each 
   period, reinvestment of all dividends and distributions, and the complete 
   redemption of the investment at the net asset value at the end of each 
   period. 
** Annualized. 
 + Ratios include fees paid indirectly. 
    

III. THE TRUST 

   
  Pioneer U.S. Government Money Fund is one series of Pioneer Money Market 
Trust (the "Trust"), an open-end, management investment company (commonly 
referred to as a mutual fund) organized as a Massachusetts business trust on 
March 31, 1987 and reorganized as a Delaware business trust on March 30, 
1995. Pioneer Cash Reserves Fund is also a series of the Trust. The Trust has 
authorized an unlimited number of shares, which are currently organized into 
these two series, and continuously offers its shares to the public. Pioneer 
U.S. Government Money Fund is closed to new shareholders. The Fund is 
expected to be acquired by Pioneer Cash Reserves Fund on or about July 1, 
1996 pursuant to an agreement and plan of reorganization approved by the 
Fund's Trustees. As part of the acquisition, Pioneer U.S. Government Money 
Fund will cease operations and its shareholders will become holders of the 
Class A shares of Pioneer Cash Reserves Fund. The acquisition is expected to 
be a tax-free reorganization. Under normal conditions, each series of the 
Trust must redeem shares upon the demand of any shareholder. The Trustees 
have the authority, without shareholder approval, to classify and reclassify 
the shares of the Funds or any new series of the Trust. As of the date of 
this Prospectus, the Trustees have authorized the issuance of a single class 
of shares for Pioneer U.S. Government Money Fund, designated Class A, and, 
for Pioneer Cash Reserves Fund only, three classes of shares, designated 
Class A, Class B and Class C. 

IV. INVESTMENT OBJECTIVE AND POLICIES 

  The investment objective of Pioneer U.S. Government Money Fund is to provide 
high current income, preservation of capital and liquidity through 
investments in high-quality short-term securities. 

  The Fund seeks to maintain a constant net asset value of $1.00 per share by 
investing in a portfolio of money market instruments maturing within 397 days 
and with a dollar-weighted average maturity of 90 days or less. 
    

                                      3 
<PAGE>
 
   
  There can be no guarantee that the Fund will achieve its investment 
objective or that it will be able to maintain a constant $1.00 net asset 
value per share. 
    

Suitability 

   
  The Fund is designed to provide a convenient way for individual, corporate 
and institutional investors to earn income on their cash reserves, with easy 
access to their money and stable principal value. 

  Ownership of shares of the Fund also eliminates the bookkeeping and 
administrative inconvenience of purchasing money market securities directly. 

Investment Policies 

  The Fund invests exclusively in obligations issued by or guaranteed as to 
principal and interest by the U.S. government or any of its agencies or 
instrumentalities and in repurchase agreements secured by these obligations. 
The government securities in which the Fund invests may or may not be backed 
by the full faith and credit of the U.S. government. U.S. Treasury notes, 
bills, certificates of indebtedness and bonds, and certain obligations issued 
by government-sponsored agencies and enterprises acting under the authority 
of Congress, are backed by the full faith and credit of the U.S. government. 
Such obligations include, but are not limited to, obligations issued by the 
Government National Mortgage Association, the Farmers' Home Administration 
and the Small Business Administration. The Fund may also invest in securities 
issued by government agencies or instrumentalities (such as executive 
departments of the government or independent federal organizations supervised 
by Congress) which are supported by the right of the issuer to borrow from 
the U.S. Treasury or by the credit of the agency, authority or 
instrumentality itself. Such obligations include, but are not limited to, 
obligations issued by the Tennessee Valley Authority, the Bank for 
Cooperatives, Federal Home Loan Banks, Federal Intermediate Credit Banks and 
Federal Land Banks. The Fund may also invest in obligations backed solely by 
the credit of the issuing agency itself. There is no guarantee that the U.S. 
government would support such securities and, accordingly, they may involve a 
risk of nonpayment of principal and interest. 
    

  While the Fund may invest in any of the obligations described above, the 
Fund generally intends, under normal circumstances and to the extent 
practicable, to limit its investments to certain U.S. government obligations 
the interest on which is generally exempt from state income taxes in order to 
increase the percentage of the Fund's distributions attributable to such 
interest and therefore exempt from such taxes in most states. 

Additional Information 

   
  In addition to the foregoing policies, the Fund is subject to certain 
regulatory requirements. The Fund may purchase only securities that PMC 
believes present minimal credit risks and that are rated by the major rating 
agencies, such as Standard & Poor's Ratings Group ("S&P") and Moody's 
Investor Services, Inc. ("Moody's"), within the two highest rating categories 
for short-term debt obligations or, if unrated, are determined to be of 
equivalent quality by PMC. If a security has been assigned different ratings 
by different rating agencies, at least two rating agencies must have assigned 
the highest rating in order for PMC to rely on that highest rating. 

  Pioneer U.S. Government Money Fund will not invest more than 5% of its total 
assets in securities that, although of high quality, have not been rated in 
the highest short-term rating category by at least two rating agencies (or if 
rated by only one rating agency, by that rating agency or, if unrated, 
determined to be of equivalent quality by PMC), provided that within this 5% 
limitation, the Fund will not invest more than the greater of 1% or $1 
million of its total assets in the securities (other than U.S. Government 
securities) of any one issuer. 

  The Fund may enter into repurchase agreements with approved banks and 
broker-dealers for periods not to exceed seven days and only with respect to 
U.S. Government securities that throughout the period have a value at least 
equal to the amount of the loan (including accrued interest). However, the 
Fund does not intend to engage in repurchase agreements as long as the income 
from such agreements continues to be generally subject to state income taxes. 

  The Fund will not invest more than 25% of its assets in any one industry, 
except that there is no percentage limitation on investments in bank 
obligations or U.S. Government obligations. 

  The Fund intends to hold its investments until maturity, but may sell them 
prior to maturity for a number of reasons, including: to shorten or lengthen 
the average maturity; to increase the yield; to maintain the quality of the 
portfolio; or to maintain a stable share value. 
    

                                      4 
<PAGE>
 
   
  It is the policy of the Fund not to engage in trading for short-term 
profits. The Fund will engage in portfolio trading if PMC believes that a 
transaction net of costs (including custodian's fees) will contribute to the 
achievement of the Fund's investment objective. 

  The Fund has no present plans to change its policies with regard to the 
types or maturities of securities in which it invests. However, if the Fund 
determine that its investment objective can best be achieved by a change in 
investment policy or strategy, the Fund may make such changes without 
shareholder approval by disclosing them in the Prospectus. The Fund's 
investment objective may not be changed without shareholder approval. 

  The investment characteristics of U.S. Government obligations, bank 
obligations, commercial paper and repurchase agreements are described in 
greater detail in the Appendix to this Prospectus. The Statement of 
Additional Information also provides more information on the above investment 
strategies, as well as information on additional investment restrictions, 
including those which may not be changed without shareholder approval. 

V. FUND SHARES 

  Pioneer U.S. Government Money Fund offers only one Class of shares, 
designated as Class A shares. Class A shares may be purchased at net asset 
value without a sales charge or commission and are subject to distribution 
and service fees at a combined annual rate of up to 0.15% of the Fund's 
average daily net assets attributable to Class A shares. 

  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 contingent deferred sales charges ("CDSC") applicable to the shares of 
the Fund 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 

   
  The purchase and redemption price of the Fund's shares is equal to the net 
asset value ("NAV") per share. The NAV per share of the Fund is determined by 
dividing the value of its assets, less liabilities (expenses and fees are 
accrued daily), by the number of shares outstanding. The Fund's NAV is 
computed twice daily, on each day the New York Stock Exchange (the 
"Exchange") is open, at 12:00 noon Eastern Time and as of the close of 
regular trading on the Exchange. 

  Securities are valued at amortized cost. Under the amortized cost pricing 
method, a portfolio investment is valued at its cost and, thereafter, any 
discount or premium is amortized to maturity, regardless of the impact of 
fluctuating interest rates on the market value of the investment. Amortized 
cost pricing facilitates the maintenance of a $1.00 constant NAV per share, 
but, of course, this cannot be guaranteed. All assets of the Fund 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 FUND SHARES 

   
  The Fund is closed to new shareholders. If you are already a Fund 
shareholder, you may buy Fund shares through broker-dealers who have selling 
agreements with the Trust's distributor, Pioneer Funds Distributor, Inc. (" 
PFD"). Shares may also be purchased directly from PFD. Call Pioneering 
Services Corporation ("PSC") at 1-800-225-6292 if you need assistance. 

  The minimum initial investment is $1,000 except as specified below. The 
minimum initial investment is $50 for 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. 

  Dividends on Purchases. The Fund seeks to be fully invested at all times in 
order to accrue dividends to your account each day. To be eligible for each 
day's dividend accrual, each direct purchase of shares in the Fund must be 
converted to same day funds. Same day funds are monies credited to State 
Street Bank and Trust Company's ("State Street Bank") account with the 
Federal Reserve Bank of Boston. 
    

  If your purchase order is received in good order and accepted by the Fund by 
12:00 noon Eastern Time, it will be executed at the NAV next determined after 
your purchase payment is converted into same day funds or other immediately 
available funds and your shares will begin earning dividends that day. If 
your purchase order is 

                                      5 
<PAGE>
 
received in good order and accepted after 12:00 noon Eastern Time and prior 
to the close of the Exchange (usually, 4:00 p.m. Eastern Time), it will be 
executed at the NAV next determined after your purchase payment is converted 
into same day funds or other immediately available funds and your shares will 
begin earning dividends on the next business day. When you purchase shares by 
check, your shares will begin earning dividends when the check is converted 
into same day funds, normally within two business days. 

   
  On any day that State Street Bank, the Custodian (as defined below) or the 
Exchange closes early, or, in PMC's judgment closing early is in the best 
interest of the Fund's shareholders, the Fund reserves the right to advance 
the time by which transactions (purchases, sales or exchanges) must be 
received in order to be eligible for that day's dividends. 

Making Your Investment 

  By Mail. Send your check or negotiable bank draft, drawn on a U.S. bank and 
payable in U.S. dollars to the Fund, to PSC at the above address. Cash will 
not be accepted. Your payment should be accompanied by a completed Account 
Application or other instructions indicating your account number. 

  If you pay by check or draft, State Street Bank will normally make same day 
funds available to the Fund, and the Fund will accept the order, on the first 
business day after receipt. Checks drawn on some other banks may take more 
than one day to be collected and share purchases will not be made until same 
day funds are available to the Fund. 
    

  By Telephone. Your account is automatically authorized to have the telephone 
purchase privilege unless you indicated otherwise on your Account Application 
or by writing to PSC. The telephone purchase option may be used to purchase 
additional shares for an existing 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. Pioneer will 
electronically debit the amount of each purchase from this predesignated 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. 

  By Wire. When you wish to wire money to an existing Pioneer account, call 
PSC at 1-800-225-6292 to obtain complete instructions. You will be asked to 
instruct your bank to transmit same day funds by wire through the Federal 
Reserve banking system. The wiring instructions must include the following 
information: 

Receiving Bank              State Street Bank and Trust Company 
Address                     225 Franklin Street 
                            Boston MA 02101 
ABA Transit                 011000028 
For Further Credit To       Shareholder Name 
                            Existing Pioneer Account # 
                            Pioneer U.S. Government Money Fund 

  Federal funds directed to the Custodian must be pre-approved by calling PSC 
at 1-800-225-6292. To be sure that a bank wire is accepted on the same day it 
is sent, you should give the Fund notice of your intention to make such 
investment as early in the day as possible since the process of making a wire 
transfer may take several hours and may be affected by your bank's internal 
procedures concerning wire transfers. Your bank may charge for sending same 
day funds on your behalf. State Street Bank presently does not charge for 
receipt of wired same day funds, but reserves the right to charge for this 
service in the future. 

  Waiver or Reduction of Contingent Deferred Sales Charge. The CDSC on any 
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 Internal Revenue Code of 1986, as amended (the 
"Code") of all registered owners occurring 


                                      6 
<PAGE>
 
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 Fund at the time the withdrawal plan is established). 

  The CDSC on any 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 70-1/2 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 Fund 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 any 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 
company; or (b) the redemption is made pursuant to each Fund's right to 
liquidate or involuntarily redeem shares in a shareholder's account. 

  Broker-Dealers. Shares of the Fund may be purchased through a securities 
broker or dealer or directly from PFD. A broker or dealer may charge for this 
service. If you do not have a securities broker or dealer, PSC can refer you 
to one. 

  An order for Fund shares received by PFD from a broker-dealer prior to 
either 12:00 noon Eastern Time or the close of regular trading on the 
Exchange is confirmed at the price next determined after the order is 
received. It is the responsibility of broker-dealers to transmit orders so 
that they will be received by PFD prior to either 12:00 noon Eastern Time or 
its close of business (usually 5:30 p.m. Eastern Time). 

  General. The Fund reserves the right in its sole discretion to withdraw all 
or any part of the offering of shares when, in the judgment of the Fund's 
management, such withdrawal is in the best interest of the Fund. 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. 

  Conditions of Purchase. The Fund reserves the right to reject any purchase 
or exchange. If a purchase is canceled because your check is returned unpaid, 
you are responsible for any loss the Fund incurs and a separate charge may be 
made for any unpaid check. The Fund may redeem shares from your account(s) to 
cover these costs and charges and you may be restricted from making future 
purchases of shares of any of the Pioneer mutual funds. 
    

VIII. HOW TO SELL FUND SHARES 

   
  You can arrange to sell (redeem) Fund shares on any day the Exchange is open 
by selling either some or all of your shares to the Fund by mail, by 
telephone or by facsimile ("fax"). Shares may also be sold by check when 
properly authorized in advance. 
    


                                      7 
<PAGE>
 
  You may sell your shares either through your broker-dealer or directly to 
the Fund. Please note the following: 

(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 (expected to 
be a constant $1.00) after your order is received and in good order, less any 
applicable CDSC. Subject to the limitation described above for shares 
purchased by check, sale proceeds are normally mailed or wired the next 
business day but in any event not later than seven days after your order is 
received in good order. The Fund reserves the right to withhold payment of 
the sale proceeds until checks received by the Fund in payment for the shares 
being sold have cleared, which may take up to 15 calendar days from the 
purchase date. 

   By Check. Shareholder(s) who have established a checking account with The 
First National Bank of Omaha (the "First National Bank") may draw checks for 
not less than $500 nor more than $250,000, payable to anyone. When a check is 
presented to First National Bank for payment, it will cause the Fund to 
redeem at the net asset value next determined a sufficient number of the 
shareholder's shares to cover the check. A shareholder receives the daily 
dividends declared on his or her shares until the day the check clears. 

   The checking account is subject to First National Bank's rules and 
regulations governing checking accounts. If there is an insufficient number 
of shares in a shareholder's account when a check is presented to First 
National Bank for payment, the check will be returned. Since the aggregate 
value of a shareholder's account in the Fund changes each day because of the 
daily dividend, a shareholder should not attempt to withdraw the full amount 
in his or her account by using a check. Checkwriting is generally not 
available for retirement plan accounts or accounts subject to backup 
withholding (see "Dividends, Distributions and Tax Status" and "Voluntary Tax 
Withholding"). 
    

   In Writing. You may sell your shares by delivering a written request 
signed by all registered owners and in good order to PSC, at P.O. Box 9014 
Boston, MA 02205-9014, 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 Fund's name, your fund account 
number, the dollar amount or number of shares to be redeemed, and any other 
applicable requirements as described below. Unless instructed otherwise, 
Pioneer 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 accepted until they are received in good 
order by PSC. Good order means that there are no outstanding claims or 
requests to hold redemptions on the account, certificates, if any, 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 fax. The Fund may waive 
the signature guarantee requirement for redemption requests of $50,000 or 
less provided that the redemption proceeds are directed to the shareholder(s) 
of record at the address of record. 
    

   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 the PSC. You may redeem up to $50,000 of 
your shares by telephone or fax and receive the proceeds by check or bank 
wire or electronic funds transfer. The redemption proceeds must be made 
payable exactly as the account is registered. To receive the proceeds by 
check: 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 

                                      8 
<PAGE>
 
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. The telephone redemption option is not available to 
retirement plan accounts. 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. 

  A redemption order received by telephone or fax in proper form by PMC before 
12:00 noon Eastern Time on any business day becomes effective as of 12:00 
noon that day, and shares so redeemed will not receive that day's dividend. A 
redemption order received by telephone or fax in proper form by PSC after 
12:00 noon Eastern Time and prior to the close of the Exchange (usually, 4:00 
p.m. Eastern Time) on any business day becomes effective as of 4:00 p.m. that 
day, and shares so redeemed will receive that day's dividend. In either case, 
proceeds of such a redemption will normally be mailed or wired the next 
business day. State Street Bank charges a fee for wiring funds; the fee will 
be deducted from the amount redeemed. 

   
  Selling Shares Through Your Broker-Dealer. The Fund has authorized PFD to 
act as its agent in the repurchase of shares of the Fund from qualified 
broker-dealers and reserves the right to terminate this procedure at any 
time. Your broker-dealer must receive your request and transmit it to PFD 
either by 12:00 noon Eastern Time or before PFD's close of business to 
receive the next determined 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 
Fund in an account with a net asset value of less than the minimum required 
amount due to redemptions or exchanges, the Fund 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 Fund to you of the Fund's intention to redeem the 
shares. 

  General. The Fund and First National Bank each reserve the right at any time 
to terminate, suspend or change the terms of or impose fees on any redemption 
method described in this Prospectus, except redemption by mail. 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 Fund 
of securities owned by it is not reasonably practicable or it is not 
reasonably practicable for the Fund to fairly determine the value of the net 
assets of its portfolio; or the SEC, by order, so permits. 
    

IX. HOW TO EXCHANGE FUND 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 
Pioneer mutual fund out of which you wish to exchange and the name of the 
Pioneer mutual fund into which you wish to exchange, your fund account 
number(s) 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 the Fund. 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. Shares of the Fund acquired 
through an exchange from another Pioneer mutual fund or through reinvestment 
of dividends or capital gains distributions, may be exchanged at net asset 
value for the same class of shares in any other Pioneer mutual fund. Shares 
of the Fund acquired by direct purchase may be exchanged for the same class 
of any other Pioneer 


                                      9 
<PAGE>
 
mutual fund at net asset value plus any applicable sales charge. Not all 
Pioneer mutual funds offer more than one Class of shares. 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 the 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 12:00 noon Eastern Time will be 
effective at 12:00 noon if the requirements above have been met and they will 
not be eligible for that day's dividend. Exchange requests received by PSC 
after 12:00 noon and before 4:00 p.m. Eastern Time will be effective at 4:00 
p.m. if the requirements above have been met and they will be eligible for 
that day's dividend. PSC will process exchanges only after receiving an 
exchange request in good order. There are currently no fees or sales charges, 
other than those described above, 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 Fund 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. For the protection of the Fund's performance and 
shareholders, the Fund 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 Fund's portfolio management 
strategy or its operations. In addition, the Fund 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 PLAN 

  The Trust, on behalf of the Fund, has adopted a Plan of Distribution for its 
Class A shares ("Class A Plan") in accordance with Rule 12b-1 under the 
Investment Company Act of 1940, as amended (the "1940 Act"), pursuant to 
which certain distribution and service fees are paid. 

  Pursuant to the Fund's Class A Plan, the Fund reimburses PFD 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 of Trustees has approved the following categories of expenses for 
Class A shares of the Fund: (i) a service fee to be paid to qualified 
broker-dealers in an amount not to exceed 0.15% per annum of the Fund's 
average daily net assets attributable to Class A shares and (ii) 
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 Fund pursuant to the Class A Plan are accrued daily and 
may not exceed 0.15% of the Fund'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 Fund 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 Fund. 
    

XI. DIVIDENDS, DISTRIBUTIONS AND TAXATION 

   
  The Fund 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 


                                      10 
<PAGE>
 
to shareholders at least annually. Under the Code, the Fund 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 Fund intends to make 
distributions in a timely manner and accordingly does not expect to be 
subject to the excise tax. 

  At 4:00 p.m. Eastern Time each business day, the Fund will declare 
substantially all of its net investment income (consisting of earned interest 
income less expenses) as a dividend to its shareholders of record as of 12:00 
noon Eastern Time. Shareholders begin earning dividends on the first business 
day after the Fund is credited with same day funds. However, investors whose 
payments are wired to and received by the Trust's Custodian in federal funds 
by 12:00 noon, Eastern Time, will receive the dividend declared that day. 
Unless you specify otherwise on your Account Application, all distributions 
will be automatically reinvested in additional full and fractional shares of 
the Fund. 

  Each month's distributions from net investment income will be paid on the 
last business day of the month. Short-term capital gains distributions, if 
any, may be paid with the daily dividend. For federal income tax purposes, 
all distributions will normally be taxable to the Fund's shareholders as 
ordinary income, whether taken in cash or reinvested in shares. Dividends and 
capital gains distributions may also be made at such times as may be 
necessary to avoid federal income or excise tax under the Code. 

  Taxable dividends and other taxable distributions which are paid to 
individuals and other non-exempt payees will be subject to a 31% backup 
withholding of federal income tax if the Fund is not provided with the 
shareholder's correct taxpayer identification number and certification that 
the number is correct and that the shareholder is not subject to backup 
withholding or the Fund receives notice from the IRS or a broker that 
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, estates and trusts and who are subject to 
U.S. federal income tax. In many states, the portion of the dividends paid by 
the Fund that is attributable to the interest received from certain U.S. 
government obligations will be exempt from state income taxation. A state 
and/or local intangible property tax exemption may also be available to the 
extent the value of the Fund's assets is attributable to such U.S. government 
obligations. In some cases, state tax rules may condition these exemptions on 
certain concentration, designation, reporting or other requirements, and the 
Fund will not necessarily satisfy all such requirements in all states. 
Non-U.S. shareholders and tax-exempt shareholders are subject to different 
tax treatment that is not described above. You should consult your own tax 
adviser regarding applicable state, local and other tax laws. Information as 
to the federal tax status of distributions will be provided to shareholders 
annually. 
    

XII. MANAGEMENT OF THE TRUST 

   
  The Trust's Board of Trustees has overall responsibility for management and 
supervision of the Fund. There are currently eight Trustees of the Trust, six 
of whom are not "interested persons" of the Trust as defined in the 1940 Act. 
The Board meets at least quarterly. By virtue of the functions performed by 
PMC, 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 background of each 
Trustee and executive officer of the Trust. 

  The Fund is managed under a contract with PMC. PMC serves as investment 
adviser to the Fund and is responsible for the overall management of the 
Fund's business affairs, subject to the authority of the Board of Trustees. 
PMC is a wholly-owned subsidiary of The Pioneer Group, Inc. ("PGI"), a 
Delaware corporation. 

  In addition to the Fund, 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 PGI'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 Fund. PMC pays all the expenses, including 
executive salaries and the rental of certain office space, related to its 
services for the Trust, with the exception of the following which are paid by 
the Trust: (a) charges and expenses for fund accounting, pricing and 
appraisal services and related overhead, including, to the extent such 
services are performed by personnel of PMC or its affili- 


                                      11 
<PAGE>
 
ates, office space and facilities and personnel compensation, training and 
benefits; (b) the charges and expenses of auditors; (c) the charges and 
expenses of any custodian, transfer agent, plan agent, dividend disbursing 
agent and registrar appointed by the Trust with respect to the Fund; (d) 
issue and transfer taxes, chargeable to the Fund in connection with 
securities transactions to which the Fund is a party; (e) insurance premiums, 
interest charges, dues and fees for membership in trade associations, and all 
taxes and corporate fees payable by the Fund to federal, state or other 
governmental agencies; (f) fees and expenses involved in registering and 
maintaining registrations of the Fund and/or its shares with the SEC, 
individual states or blue sky securities agencies, territories and foreign 
countries, including the preparation of Prospectuses and Statements of 
Additional Information for filing with regulatory agencies; (g) all expenses 
of shareholders' and Trustees' meetings and of preparing, printing and 
distributing prospectuses, notices, proxy statements and all reports to 
shareholders and to governmental agencies; (h) charges and expenses of legal 
counsel to the Trust and the Trustees; (i) distribution fees paid by the Fund 
in accordance with Rule 12b-1 promulgated by the SEC pursuant to the 1940 
Act; (j) compensation of those Trustees of the Trust who are not affiliated 
with or interested persons of PMC, the Trust (other than as Trustees), PGI or 
PFD; (k) the cost of preparing and printing share certificates; and (l) 
interest on borrowed money, if any. In addition to the expenses described 
above, the Trust shall pay all brokers' and underwriting commissions 
chargeable to the Trust in connection with securities transactions to which 
the Fund is a party. 

  Orders for the Fund's portfolio securities transactions are placed by PMC, 
which strives to obtain the best price and execution for each transaction. In 
circumstances where 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 the Fund or other Pioneer mutual funds. 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 0.40% per annum of the 
Fund's average daily net assets. The fee is normally computed daily and paid 
monthly. PMC has voluntarily and temporarily agreed to reduce its management 
fees for the Fund and to make other arrangements as may be necessary to keep 
such expenses below specified levels. See "Expense Information." 

  During the fiscal year ended December 31, 1995, Pioneer U.S. Government 
Money Fund incurred actual expenses of $408,989 before management fees, paid 
or payable to PMC, and other expenses were reduced pursuant to PMC's 
voluntary expense limitation agreement in effect through December 31, 1995, 
as described further in the Statement of Additional Information. 

  John F. Cogan, Jr., Chairman of the Board and President of the Trust and 
President and a Director of PGI and of PMC, owned approximately 14% of the 
outstanding capital stock of PGI as of the date of this Prospectus. PMC is a 
wholly-owned subsidiary of PGI. PFD is an indirect wholly-owned subsidiary of 
PGI. 
    

XIII. DESCRIPTION OF SHARES AND VOTING RIGHTS 

   
  The shares of the Trust are divided into two series: the Fund and Pioneer 
Cash Reserves Fund. The Fund is expected to cease operations on or about July 
1, 1996 in accordance with a plan of reorganization approved by the Trustees. 
Each share represents an equal proportionate interest in a Fund with each 
other share. The Trust reserves the right to create and issue additional 
series of shares in addition to the Funds currently available. The shares of 
a series participate equally in the earnings, dividends and assets of the 
particular series, except to the extent the rights of a particular class of 
shares may differ from those of another class or classes. As of the date of 
this Prospectus, the Trustees have authorized the issuance of a single class 
of shares for Pioneer U.S. Government Money and three classes of shares, 
designated Class A, Class B and Class C, for Pioneer Cash Reserves Fund. The 
shares of each class represent an interest in the same portfolio of 
investments of the Fund. 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, Class B and Class C 
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. 
    

  The Trust is not required, and does not intend, to hold annual shareholder 
meetings although special meetings 

                                      12 
<PAGE>
 
may be called for the purpose of electing or removing Trustees, changing 
fundamental investment restrictions or approving a management contract. 

  Generally, shares of each Fund will vote as a single series on matters that 
affect all Funds in substantially the same manner. As to matters affecting 
each Fund (e.g., changes in a Fund's investment restrictions), shares of each 
Fund will vote as a separate series. Shares have no preemptive, subscription, 
or conversion rights and are freely transferable. Shareholders are entitled 
to one vote for each share held and may vote in the election of Trustees and 
on other matters submitted to shareholders. Shares are fully-paid and, except 
as set forth in the Statement of Additional Information, non-assessable. 

  Upon liquidation of the Trust, each Fund's shareholders will receive pro 
rata, subject to the rights of creditors, (a) the proceeds of the sale of the 
assets held in the respective series to which the shares of the Fund relate, 
less (b) the liabilities of the Trust attributable to the respective series. 
Shares will remain on deposit with the Trust's transfer agent and 
certificates will not be issued. 

XIV. 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. 
Inquiries to PSC should be mailed to Shareholder Services, 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. The principal address of the Mutual Fund 
division of the Custodian is 40 Water Street, Boston, Massachusetts 02109. 

Account and Confirmation Statements 

  PSC maintains accounts for shareholders and all transactions are recorded in 
these accounts. Confirmation statements showing the details of transactions 
are sent to shareholders monthly. The Pioneer Combined Account Statement, 
mailed quarterly, is available to all shareholders who have more than one 
Pioneer account. The bottom portion of the confirmation statement should be 
used as a remittance slip to make additional investments or to indicate a 
change of address on your account. 

  Shareholders whose shares are held in the name of an investment 
broker-dealer or other party will not normally have an account with the Fund 
and might not be able to utilize some of the services available to 
shareholders of record. Examples of services which 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 
(minimum of $100) to PSC (your account number 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 Fund 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 $100 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 
draft drawn on a checking account. Pioneer Investomatic Plan investments are 
voluntary, and you may discontinue the plan at any time without penalty upon 
30 days' written notice to PSC. PSC acts as agent for the purchaser, the 
broker-dealer and PFD in maintaining these plans. 

Financial Reports and Tax Information 

   
  Shareholders will receive financial reports semi-annually. Each annual 
report will be audited by the Trust's independent public accountants. In 
January of each year, the Fund will mail to shareholders information about 
the tax status of dividends and distributions. 

   Regular Reinvestment. Dividends are automatically reinvested in additional 
  shares of the Fund unless you instruct otherwise. 
    

   Check. You may elect (in writing) to receive monthly dividend checks. You 
  may also direct that dividend checks be paid to another person or sent to 
  another address (other than the one on file for your account), although if 
  you make either designation after you have opened your account, a signature 
  guarantee signed by all registered account owners must accompany your 
  instructions. 

   Directed Dividends. You may elect (in writing) to have the dividends paid 
  by one Pioneer mutual fund account 

                                      13 
<PAGE>
 
  invested in a second Pioneer mutual fund account of the same class. 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 
  Systematic 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 gains distributions paid from your account (before any reinvestment) 
and forward the amount withheld to the IRS as a credit against your federal 
income taxes. This option is not available for retirement plan accounts or 
for accounts subject to backup withholding. 

Retirement Plans 

   
  Interested persons should contact the Retirement Plans Department of PSC at 
1-800-622-0176 for information relating to Pioneer's retirement plans for 
businesses, Simplified Employee Pension Plans, IRAs, Section 401(k) salary 
reduction plans and Section 403(b) retirement plans for employees of 
associations, public school systems and charities. The Account Application 
accompanying this Prospectus should not be used to establish such plans. 
Separate applications are required. 
    

Yield Information 

   
  Yield information may be obtained by telephone 1-800-225-4321. Yield 
information is updated each weekday and is based on the annualized yield over 
the immediately preceding seven days, determined with a formula established 
by the SEC. See "Investment Results" below. Yields are not fixed and will 
vary with changes in the income and expenses of the Fund. 
    

Telecommunications Device for the Deaf (TDD) 

  If you have a hearing disability and you 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 providing for fixed payments at regular intervals. 
Periodic checks of $50 or more will be sent to you monthly or quarterly. You 
may also direct that withdrawal checks be paid to another person, although if 
you make this designation after you have opened your account, a signature 
guarantee must accompany your instructions. 
    

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

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 Fund shares by telephone. 
For personal assistance, call 1-800-225-6292 between 8:00 a.m. and 9:00 p.m. 
Eastern time on weekdays. See "Share Price," "How to Sell Fund Shares," and 
"How to Exchange Fund Shares" for more information. 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 Fund 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 Fund may be liable for any loss due to 
unauthorized or fraudulent instructions. The Fund may implement other 
procedures from time to time. In all other cases, neither the Fund, 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 


                                      14 
<PAGE>
 
be difficult to contact the Fund by telephone to institute a redemption or 
exchange. You should communicate with the Fund in writing if you are unable 
to reach the Fund 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 other third party may not be able to use FactFone(SM). See 
"How to Buy Fund Shares," "How to Exchange Fund Shares," "How to Sell Fund 
Shares" and "Telephone Transactions and Related Liabilities." Call PSC for 
assistance. 
    

XV. INVESTMENT RESULTS 

   
  From time to time, the Fund may include in advertisements or other 
communications to existing or proposed shareholders its respective "yield" 
and "effective yield." The "yield" is computed by dividing the Fund's net 
investment income per share during a base period of seven days (which period 
will be stated in the communication) by the net asset value per share of the 
Fund on the last day of such seven-day period. The Fund's net investment 
income per share is determined by dividing net investment income during the 
base period by the average number of shares of the Fund entitled to receive 
dividends during the base period. The Fund's seven-day yield is then 
annualized by a computation that assumes that the Fund's net investment 
income is earned for a one-year period at the same rate as during the 
seven-day base period. The "effective yield" is calculated similarly, except 
that income is assumed to be reinvested. The "effective yield" will be 
slightly higher than the "yield" because of the compounding effect of the 
assumed reinvestment. 

  The yield of the Fund will vary from time to time depending on market 
conditions, the composition of the Fund's portfolio and operating expenses. 
The temporary policy of the Fund's investment adviser to reduce management 
fees and limit expenses will, so long as such policy is in effect, have the 
effect of increasing yield. These factors and possible differences in the 
methods used in calculating yields should be considered when comparing 
performance information published for other investment companies and other 
investment vehicles. Yield quotations should also be considered relative to 
the risks associated with the Fund's investment objective and policies. At 
any time in the future, yield quotations may be higher or lower than past 
yield quotations, and there can be no assurance that any historical yield 
quotation will continue in the future. 

  The Fund may also include comparative performance information in advertising 
or marketing their shares. This performance information may include data from 
Lipper Analytical Services, Inc., Donoghue's Money Fund Report or other 
industry publications. 
    

  For more information regarding the computation of yield, see the Statement 
of Additional Information. 

XVI. APPENDIX 

   
  Some of the terms used in this Prospectus are described below. 
    

  "Money Market" refers to the marketplace composed of the financial 
institutions which handle the purchase and sale of liquid, short-term, 
high-grade debt instruments. The money market is not a single entity, but 
consists of numerous separate markets, each of which deals in a different 
type of short-term debt instrument. These include U.S. government 
obligations, commercial paper, bank obligations, municipal securities, and 
other debt instruments, generally referred to as money market instruments. 

   
  "Repurchase Agreements" are transactions by which the Fund purchases a 
security and simultaneously commits to resell that security to the seller at 
an agreed upon price on an agreed upon date within a number of days (usually 
not more than seven) from the date of purchase. The resale price reflects the 
purchase price plus an agreed upon market rate of interest which is unrelated 
to the coupon rate or maturity of the purchased security. A repurchase 
agreement involves the obligation of the seller to pay the agreed upon price, 
which obligation is in effect secured by the value (at least equal to the 
amount of the agreed upon resale price and marked to market daily) of the 
underlying security. 


                                      15 
<PAGE>
 
Whether a repurchase agreement is the purchase and sale of a security or a 
collateralized loan has not been definitely established for purposes other 
than the application of the federal statutory provisions exempting U.S. 
government obligations from state taxation (for which purpose a repurchase 
agreement is treated as a collateralized loan). This might become an issue in 
the event of the bankruptcy of the other party to the transaction. While it 
is not possible to eliminate all risk from these transactions (particularly 
the possibility of a decline in the market value of the underlying 
securities, as well as delay and costs to the Fund in connection with 
bankruptcy proceedings), it is the policy of the Fund to enter into 
repurchase agreements only with banks and broker dealers approved by the 
Board of Trustees of the Trust and only with respect to U.S. government 
securities which throughout the period have a value at least equal to the 
amount of the loan (including accrued interest). It is also the policy of the 
Board of Trustees to evaluate on a periodic basis the creditworthiness of the 
parties with which the Fund engages in repurchase agreements. 
    

  "U.S. Government Obligations" are debt securities (including bills, notes, 
and bonds) issued by the U.S. Treasury or issued by an agency or 
instrumentality of the U.S. government which is established under the 
authority of an Act of Congress. Such agencies or instrumentalities include, 
but are not limited to, the Federal National Mortgage Association, the Small 
Business Administration, the Government National Mortgage Association, and 
the Federal Home Loan Banks. Although all obligations of agencies and 
instrumentalities are not direct obligations of the U.S. Treasury, payment of 
the interest and principal on these obligations is generally backed directly 
or indirectly by the U.S. government. This support can range from the backing 
of the full faith and credit of the United States (U.S. Treasury securities 
and, for example, securities issued by the Small Business Administration and 
the Government National Mortgage Association) to the backing solely of the 
issuing instrumentality itself (securities issued by the Federal National 
Mortgage Association and the Federal Home Loan Banks). In the case of 
obligations not backed by the full faith and credit of the United States, the 
Trust must look principally to the agency issuing or guaranteeing the 
obligation for ultimate repayment and may not be able to assert a claim 
against the United States itself in the event the agency or instrumentality 
does not meet its commitments. 

                                      16 
<PAGE>
 
   
Pioneer U.S. Government Money Fund 
60 State Street 
Boston, Massachusetts 02109 
    

OFFICERS 
JOHN F. COGAN, JR., Chairman and President 
DAVID D. TRIPPLE, Executive Vice President 
SHERMAN B. RUSS, Vice President 
WILLIAM H. KEOUGH, Treasurer 
JOSEPH P. BARRI, Secretary 

INVESTMENT ADVISER 
PIONEERING MANAGEMENT CORPORATION 

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 and new accounts, prospectuses, 
 applications, service forms and 
 FactFone(SM) telephone transactions........................... 1-800-225-6292 
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 

   
0496-3261 
(C)Pioneer Funds Distributor, Inc. 
    

                                                                [Pioneer logo] 

   
Pioneer 
U.S. Government 
Money Fund 

Prospectus 
April 29, 1996 
    

<PAGE>


                           PIONEER MONEY MARKET TRUST
                           Pioneer Cash Reserves Fund
   
                       Class A, Class B and Class C Shares
    

                                 60 State Street
                           Boston, Massachusetts 02109

   
                       STATEMENT OF ADDITIONAL INFORMATION
                                 April 29, 1996

         This  Statement of  Additional  Information  is not a  Prospectus,  but
should be read in conjunction with the Prospectus (the "Prospectus") dated April
29, 1996 of Pioneer Cash Reserves  Fund (the "Fund").  The Fund is one series of
Pioneer  Money  Market  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 Fund at 60 State Street, Boston, Massachusetts 02109. The
Fund's Annual Report for the fiscal year ended  December 31, 1995 is attached to
this  Statement of  Additional  Information  and is hereby  incorporated  in the
Statement of Additional Information by reference.
    

                                TABLE OF CONTENTS
                                                                         Page

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

Appendix A................................................................21
Appendix B................................................................34

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

          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 identifies the Fund's investment objective and principal
investment policies. Other investment policies and a further description of some
of the policies described in the Prospectus are set forth below.

         The following  policies and limitations  supplement  those discussed in
the  Prospectus.  Whenever an investment  policy or limitation  states a maximum
percentage  of the Fund's  assets that may be  invested in any  security or sets
forth a policy regarding  quality  standards,  such standard or other limitation
shall be determined  immediately after and as a result of the Fund's investment.
Accordingly,  any later increase or decrease  resulting from a change in values,
net assets or other  circumstances will not be considered in determining whether
the investment complies with the Fund's investment objectives and policies.

         Certificates of Deposit. The Fund may invest in certificates of deposit
of large domestic banks and savings and loan associations  (i.e., banks which at
the time of their most recent annual  financial  statements show total assets in
excess of $1 billion), including foreign branches of such domestic banks, and of
smaller banks as described  below.  The Fund will not invest in  certificates of
deposit of foreign banks.
    

         Investment in  certificates  of deposit  issued by foreign  branches of
domestic  banks  involves  investment  risks that are different in some respects
from those  associated  with  investment in  certificates  of deposit  issued by
domestic  banks,  including  the possible  imposition  of  withholding  taxes on
interest  income,  the possible  adoption of foreign  governmental  restrictions
which might  adversely  affect the  payment of  principal  and  interest on such
certificates of deposit, or other adverse political or economic developments. In
addition,  it might be more difficult to obtain and enforce a judgment against a
foreign branch of a domestic bank.

         Although the Fund's  investment  adviser  recognizes that the size of a
bank  is  important,  this  fact  alone  is not  necessarily  indicative  of its
creditworthiness. The Fund may invest in certificates of deposit issued by banks
and  savings  and loan  institutions  which had at the time of their most recent
annual financial  statements total assets not in excess of $1 billion,  provided
that (i) the principal amounts of such certificates of deposit are insured by an
agency  of the U.S.  government,  (ii) at no time  will the Fund  hold more than
$100,000  principal  amount of  certificates of deposit of any one such bank and
(iii) at the time of  acquisition,  no more than 10% of the Fund's assets (taken
at current value) are invested in  certificates  of deposit of such banks having
total assets not in excess of $1 billion.

   
         Investment Restrictions. The following numerical list sets forth all of
the  fundamental   investment   restrictions   applicable  to  the  Fund.  These
restrictions  cannot be changed unless a majority of the outstanding  securities
of the Fund approves the change. As used in the Prospectus and this 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 Fund may not:
    

         (1) except with respect to  investments  in obligations of (a) the U.S.
government,  its agencies,  authorities  or  instrumentalities  and (b) domestic
banks,  purchase  any security if, as a result


                                      -2-
<PAGE>

(i) more than 5% of the assets of the Fund would be in the securities of any one
issuer, or (ii) more than 25% of its assets would be in a particular industry;

   
         (2) borrow money,  except from banks for  extraordinary  purposes or to
meet redemptions in amounts not exceeding 33 1/3% of its total assets (including
the amount borrowed). The Fund does not intend to borrow money during the coming
year;
    

         (3)      make short sales of securities;

         (4)      purchase securities on margin;

         (5) write,  purchase or otherwise invest in any put, call,  straddle or
spread  option or buy or sell real  estate,  commodities  or  commodity  futures
contracts or invest in oil, gas or mineral exploration or development programs;

         (6) make  loans to any  person,  except by (a) the  purchase  of a debt
obligation  in  which  the Fund is  permitted  to  invest  and (b)  engaging  in
repurchase agreements;

         (7) purchase the securities of other investment companies or investment
trusts,  unless  they  are  acquired  as  part  of a  merger,  consolidation  or
acquisition of assets;

         (8)  act  as an  underwriter,  except  as it  may  be  deemed  to be an
underwriter in a sale of restricted securities;

         (9)  invest in  companies  for the  purpose  of  exercising  control or
management; or

         (10) issue  senior  securities,  except  that the  issuance of multiple
classes of shares,  in  accordance  with a statute,  regulation  or order of the
Securities  and  Exchange  Commission,  shall not  constitute  the issuance of a
senior security.

   
         In  addition,  in order to  comply  with  certain  state  statutes  and
non-fundamental  policies of the Fund, the Fund will not (i) pledge, mortgage or
hypothecate its portfolio  securities if at the time of such action the value of
the  securities so pledged,  mortgaged or  hypothecated  would exceed 10% of the
value  of the  Fund,  (ii)  commit  more  than  10% of its  assets  to  illiquid
investments,  such as repurchase agreements that mature in more than seven days,
(iii)  invest  more  than  5%  of  its  assets  in  companies  which,  including
predecessors,  have a record of less than three years continuous operation, (iv)
invest in warrants,  (v) purchase or retain the  securities of any issuer if any
officer  or  Trustee  of the Fund or its  investment  adviser  is an  officer or
director  of such  issuer  and  beneficially  owns  more  than  1/2 of 1% of the
securities  of such issuer and all of the  officers and the Trustees of the Fund
and the Fund's investment adviser together own more than 5% of the securities of
such  issuer,  (vi) buy or sell  real  estate,  including  real  estate  limited
partnerships, except that the Fund may acquire or lease office space for its own
use,  invest in  securities  of issuers  that invest in real estate or interests
therein,  invest in  securities  that are  secured by real  estate or  interests
therein,  purchase and sell  mortgage-related  securities and hold and sell real
estate  acquired by the Fund as a result of the ownership of securities or (vii)
invest in oil, gas or mineral exploration or development programs or leases. The
term  "person"  as used in  fundamental  investment  restriction  no. 6 includes
institutions as well as  individuals.  Policies in this paragraph may be changed
by the Trustees without shareholder approval or notification.
    

                                      -3-
<PAGE>

   
         See the  Prospectus for a discussion of certain  additional  regulatory
requirements applicable to the Fund.
    

2.       MANAGEMENT OF THE FUND

   
         The  Fund's  Board of  Trustees  provides  broad  supervision  over the
affairs of the Fund.  The  officers of the Fund are  responsible  for the Fund's
operations.  The Trustees and  executive  officers of the Fund are listed below,
together  with  their  principal  occupations  during  the past five  years.  An
asterisk  indicates those Trustees who are interested persons of the Fund 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 (Russian timber joint venture);  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 Fund).

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.

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.
    

                                      -4-
<PAGE>

   
MARGUERITE A. PIRET, Trustee,  DOB:  May 1948
One 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 Fund) 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.

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 Fund) where he most recently served as junior partner.

SHERMAN B. RUSS, Vice President,  DOB:   July 1937
         Senior Vice  President  of PMC;  Vice  President  of Pioneer Bond Fund,
Pioneer America Income Trust and Pioneer Interest Shares, Inc.

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

                                      -5-
<PAGE>

   
         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
Fund'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 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.

   
         To the  knowledge of the Fund,  no officer or Trustee of the Fund owned
5% or more of the issued and outstanding shares of PGI on March 31, 1996, except
Mr. Cogan who then owned approximately 14% of such shares.

         At March 31,  1996,  the Trustees and officers of the Fund owned in the
aggregate  less than 1% of the  outstanding  securities of the Fund. As of March
31, 1996, no shareholders  owned more than 5% of the outstanding  Class A shares
of the Fund.  The  International  Masonry Inc.  MPPP owned  approximately  5.93%
(455,701) of the  outstanding  Class B shares of the Fund; PFD, 60 State Street,
Boston, MA 02109 owned approximately 63.85% (100,601) of the outstanding Class C
shares of the Fund;  Branko Premk and Darinla  Premk,  911 Mill Pond 
    


                                      -6-
<PAGE>

   
Valley  Dr.,  McClean,  VA 22102  owned  approximately  19.10%  (30,103)  of the
outstanding  Class C shares of the Fund; The Helen G. Passapae  Trust,  457 Huff
Lane, Aberdeen, NC, 28315 owned approximately 11.55% (18,206) of the outstanding
Class C shares of the Fund;  and David L.  Byers and Karen A.  Byers,  505 Basil
St.,  Springboro,  NH 45066 owned approximately 5.48% (8,637) of the outstanding
Class C shares of the Fund.

         Compensation  of Officers and Trustees.  Commencing on January 1, 1996,
the Fund 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 the
Fund,  estimated to be approximately  $179 for 1996. In addition,  the Fund will
pay a per meeting fee of $120 to each  Trustee who is not  affiliated  with PGI,
PMC, PFD or PSC. The Fund also will pay an annual committee participation fee to
Trustees who serve as members of committees  established to act on behalf of one
or more of the Pioneer  mutual  funds.  Committee  fees will be allocated to the
Fund on the basis of the Fund'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 Audit Committee members and the Audit Committee
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
Pricing  Committee  members and the Pricing  Committee  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 Fund under
its management contract.

         The Fund pays no salaries or compensation  to any of its officers.  For
the fiscal period ended December 31,1995,  the Fund paid an annual trustees' fee
of $100,  and a payment of $1,000 plus  expenses per meeting  attended,  to each
Trustee  who was not  affiliated  with PGI,  PMC,  PFD or PSC and paid an annual
trustees'  fee of $500 plus expenses to each Trustee  affiliated  with PGI, PMC,
PFD or PSC. Any such fees and expenses paid to affiliates or interested  persons
of PGI,  PMC,  PFD or PSC were  reimbursed  to the  Fund  under  its  Management
Contract.

         The following  table provides  information  regarding the  compensation
paid by the Fund and other Pioneer Funds to the Trustees for their services.

                                                 Pension or
                                                 Retirement          Total
                                                  Benefits        Compensation
                              Aggregate          Accrued as       from Fund and
                            Compensation         Part of the     Pioneer Family
Name of Trustee            from the Fund*      Fund's Expenses      of Funds**
    

   
John F. Cogan, Jr.***            $  500             $0              $11,000
Richard H. Egdahl, M.D.           3,155              0              $63,315
Margaret B.W. Graham              3,155              0              $62,398
John W. Kendrick                  3,155              0              $62,398
Marguerite A. Piret               3,897              0              $76,704
David D. Tripple***                 500              0              $11,000
Stephen K. West                   3,492              0              $68,180
John Winthrop                     3,680              0              $71,199

*    As of the Fund's fiscal year end.
**   As of December  31, 1995  (calendar  year end for all Pioneer  Funds listed
     above).
***  All fees paid by the Fund to  "interested"  Trustees are  reimbursed to the
     Fund by PMC.
    


                                      -7-
<PAGE>

3.  INVESTMENT ADVISER

   
         The  Fund  has   contracted   with  PMC,  60  State   Street,   Boston,
Massachusetts, to act as its investment adviser. The term of the contract is one
year and it is  renewable  annually  by the vote of a  majority  of the Board of
Trustees of the Fund  (including a majority of the Board of Trustees who are not
parties to the contract or  interested  persons of any such  parties).  The vote
must be 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 vote of its Board of  Directors  or  Trustees  or a
majority  of its  outstanding  voting  securities  and 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 0.40% per annum of
the Fund's average daily net assets. The fee is normally computed daily and paid
monthly. PMC has agreed not to impose all or a portion of its management fee for
the Fund and if necessary to limit or otherwise reduce other operating  expenses
to the extent  needed to limit the expenses of the Fund in  accordance  with the
schedule set forth in the Prospectus under Note 2 to "Expense  Information." The
management fee  attributable  to Class B and Class C Shares will only be imposed
to the extent it is imposed for Class A Shares. PMC's agreement is voluntary and
temporary  and may be revised or  terminated  at any time.  The  purpose of this
policy is to enhance the Fund's  dividend yield during the period when,  because
of its smaller size, fixed expenses have a more significant impact on yield.

         During  the  fiscal  years  ended  December  31,  1993,  1994 and 1995,
pursuant to the expense  limitation  discussed  above,  the  management  fee was
reduced by $201,232,  $250,479 and $463,300,  respectively,  resulting in actual
management  fees paid to PMC during  such  periods  of  $28,991,  $214,043,  and
$221,389, respectively.
    

4.       PRINCIPAL UNDERWRITER

   
         PFD serves as the principal underwriter for the Fund in connection with
the continuous  offering of the shares of the Fund. During the Fund's three most
recently  completed fiscal years, no underwriting  commissions were paid to PFD.
PFD commenced service as the Fund's principal underwriter as of March 31, 1995.

         The  Trust,  on  behalf  of the  Fund,  entered  into  an  Underwriting
Agreement with PFD. The  Underwriting  Agreement will continue from year to year
if annually approved by the Trustees.  The Underwriting  Agreement provides that
PFD will bear expenses for the  distribution  of the Fund's  shares,  except for
expenses  incurred by PFD for which it is  reimbursed by the Fund under the Rule
12b-1 distribution plan applicable to the Fund's Class A shares.
    

                                      -8-
<PAGE>

   
         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 Fund.  PFD also pays certain  expenses in connection  with the
distribution of the Fund'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 Fund
bears the cost of registering its shares under federal and state  securities law
and the laws of certain foreign countries.

         The Fund 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 Fund.

         The Fund will not generally issue shares for  consideration  other than
cash.  At  the  Fund's  sole  discretion,  however,  it  may  issue  shares  for
consideration  other than cash in  connection  with a bona fide  reorganization,
statutory  merger,  or other  acquisition  of portfolio  securities  (other than
municipal  debt  securities  issued  by state  political  subdivisions  or their
agencies or  instrumentalities)  provided (i) the securities meet the investment
objectives  and policies of the Fund;  (ii) the  securities  are acquired by the
Fund 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.  An exchange of securities for Fund
shares may be a taxable transaction to the shareholder.

         The redemption price of shares of beneficial  interest of the Fund may,
at PMC's  discretion,  be paid in cash or  portfolio  securities.  The Fund has,
however,  elected to be governed  by Rule 18f-1  under the 1940 Act  pursuant to
which the Fund is obligated to redeem  shares solely in cash up to the lesser of
$250,000  or 1% of the Fund's net asset value  during any 90-day  period for any
one shareholder. Should the amount of redemptions by any shareholder exceed such
limitation,  the Fund will have the  option of  redeeming  the excess in cash or
portfolio securities.  In the latter case, the securities are taken at the value
employed in determining  the Fund's net asset value. A shareholder  whose shares
are  redeemed  in-kind may incur  brokerage  charges in selling  the  securities
received  in-kind.  The selection of such securities will be made in such manner
as the Board deems fair and reasonable.
    

5.       DISTRIBUTION PLANS

   
         The Trust,  on behalf of the Fund,  has adopted a plan of  distribution
pursuant to Rule 12b-1  promulgated by the  Securities  and Exchange  Commission
(the "SEC")  under the 1940 Act with respect to the Class A, Class B and Class C
shares  of the Fund (the  "Class A Plan,"  the  "Class B Plan" and the  "Class C
Plan," respectively) (together, the "Plans").
    

                                      -9-
<PAGE>

   
         Class A Plan.  Pursuant to the Class A Plan the Fund may  reimburse PFD
for its expenditures in financing any activity  primarily  intended to result in
the sale of the Class A 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 Fund pursuant to the
Class A Plan are accrued daily at a rate which may not exceed the annual rate of
0.15% of the Fund's average daily net assets attributable to Class A shares.

         Class B Plan. The Class B Plan provides that the Fund shall pay PFD, as
the Fund's distributor for its Class B shares, a daily distribution fee equal on
an annual basis to 0.75% of the Fund's average daily net assets  attributable to
Class B shares  and  will pay PFD a  service  fee  equal to 0.25% of the  Fund'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 Fund'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  therefor,  PFD may
retain the  service  fee paid by the Fund 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  Fund.  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  contingent  deferred  sales  charges  (the  "CDSCs")
attributable to Class B shares. (See "Distribution Plans" in the Prospectus.)

         The Class C Plan  provides  that the Fund will pay PFD,  as the  Fund's
distributor  for its Class C shares,  a distribution  fee accrued daily and paid
quarterly,  equal on an annual  basis to 0.75% of the Fund's  average  daily net
assets  attributable  to Class C shares and will pay PFD a service  fee equal to
0.25% of the Fund's average daily net assets attributable to Class C shares. PFD
will in turn pay to securities  dealers which enter into a sales  agreement with
PFD a  distribution  fee and a service  fee at rates of up to 0.75%  and  0.25%,
respectively,  of the Fund's  average daily net assets  attributable  to Class C
shares  owned by  investors  for whom that  securities  dealer is the  holder or
dealer of record. The service fee is intended to be in consideration of personal
services and/or account maintenance services rendered by the dealer with respect
to Class C shares.  PFD will advance to dealers the first-year  service fee at a
rate equal to 0.25% of the amount invested.  As compensation  therefor,  PFD may
retain the  service  fee paid by the Fund with  respect  to such  shares for the
first year after  purchase.  Commencing  in the  thirteenth  month  following  a
purchase of Class C shares,  dealers will become eligible for additional service
fees at a rate of up to 0.25% of the amount invested and additional compensation
at a rate of up to 0.75% of the average net asset value of such shares.  Dealers
    



                                      -10-
<PAGE>

   
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 C 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 C Plan is
to  compensate  PFD for its  distribution  services  with respect to the Class C
shares of the Fund.  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 C Plan also  provides that PFD will receive all CDSCs
attributable to Class C shares. (See "Distribution Plans" in the Prospectus.)

         General. In accordance with the terms of the Plans, PFD provides to the
Fund 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 Fund,  nor any Trustee of the Fund who is
not an  interested  person of the Fund,  has any  direct or  indirect  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 Fund 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 Fund, as defined in the 1940 Act (none of whom has or
have any direct or indirect  financial  interest in the  operation of the Plans)
(the "Qualified  Trustees"),  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 Fund 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  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 Class or Classes  affected  thereby,  and
material  amendments  of the Plans must also be approved by the  Trustees in the
manner  described  above.  On March 10, 1995, the Board of Trustees  approved an
amendment  to the Fund's  Class A Plan,  authorizing  PFD,  in its  capacity  as
principal  underwriter of the Fund's shares,  to receive  compensation  from the
Fund pursuant to the Class A Plan.  Under the original  Class A Plan, PFD served
as servicing  agent for the Fund with respect to the Plan. The Board of Trustees
determined  that this  amendment  would not result in an  increase of the annual
percentage  limitation  of average net assets which may be spent by the Fund for
the services  described with respect to the Fund's Class A shares in the Class A
Plan. 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 Fund
and have no direct or indirect financial interest in the operations of the Plan,
or by a  vote  of a  majority  of  the  outstanding  voting  securities  of  the
respective  Class  of the  Fund  (as  defined  in the  1940  Act).  A Plan  will
automatically  terminate in the event of its  assignment (as defined in the 1940
Act). In the  Trustees'  quarterly  review of the Plans,  they will consider the
Plans' continued appropriateness and the level of compensation they provide.
    

                                      -11-
<PAGE>

   
         During the fiscal year ended December 31, 1995, the Fund incurred total
distribution fees of $207,029 and $37,445 pursuant to the Class A Plan and Class
B Plan, respectively. Class C shares were first offered January 31, 1996.

         Distribution  fees  were  paid by the Fund to PFD in  reimbursement  of
expenses  related to  servicing  of  shareholder  accounts  and to  compensating
dealers and sales personnel.

         During the fiscal  year  ended  December  31,  1995,  CDSCs,  at a rate
declining from a maximum of 4.0% of the lower of the cost or market value of the
shares being redeemed,  of $12,858 were charged to redemptions of Class B shares
made within 6 years of purchase (as described in "How to Buy Fund Shares" in the
Prospectus).  Such CDSCs are paid to PFD in reimbursement of expenses related to
servicing of  shareholder  accounts and  compensation  paid to dealers and sales
personnel.
    

6.       SHAREHOLDER SERVICING/TRANSFER AGENT

   
         The  Fund  has   contracted   with  PSC,  60  State   Street,   Boston,
Massachusetts,  to act as shareholder  services and transfer agent for the Fund.
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 Fund, PSC services shareholder
accounts,  and  its  duties  include:  (i)  processing  sales,  redemptions  and
exchanges of shares of the Fund; (ii)  distributing  dividends and capital gains
associated with Fund portfolio  accounts;  and (iii) maintaining account records
and responding to shareholder inquiries.  PSC handles all routine communications
with  shareholders  but obtains data  processing and  operational  services from
Advanced Information Service Company of Boston, Massachusetts.

         PSC receives an annual fee of $28.00 per  shareholder  account from the
Fund 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.

7.       CUSTODIAN

         Brown  Brothers  Harriman & Co.  (the  "Custodian"),  40 Water  Street,
Boston,  Massachusetts  02109,  is the  custodian  of  the  Fund's  assets.  The
Custodian's responsibilities include safekeeping and controlling the Fund's cash
and  securities,  handling the receipt and delivery of securities and collecting
interest  and  dividends  on the  Fund's  investments.  The  Custodian  does not
determine the  investment  policies of the Fund or decide which  securities  the
Fund will buy or sell. The Fund 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.
    

                                      -12-
<PAGE>

   
         Pursuant to a separate agreement with the Custodian, the Custodian also
provides certain accounting  services to the Fund,  including the calculation of
yield for the Fund.

8.       INDEPENDENT PUBLIC ACCOUNTANTS

         Arthur Andersen LLP, One  International  Place,  Boston,  Massachusetts
02110, is the Fund's independent  public  accountant,  providing audit services,
tax  return  review  and  assistance  and  consultation   with  respect  to  the
preparation of filings with the SEC.

9.       PORTFOLIO TRANSACTIONS

         The Fund intends to fully manage its  portfolios  by buying and selling
securities,  as  well  as  holding  securities  to  maturity.  In  managing  its
portfolio,  the Fund 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.

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

         Decisions relating to the purchase and sale of securities for the Fund,
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  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  mark-up or mark-down.  PMC attempts to negotiate
with  underwriters  to decrease the  commission or concession for the benefit of
the Fund.  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
have furnished statistical research and other information or services to PMC and
the Fund.  Management  believes that no exact dollar value can be calculated for
such services.
    

                                      -13-
<PAGE>

   
         During the fiscal  years  ended  December  31,  1995,  1994,  and 1993,
respectively, the Fund paid no brokerage or underwriting commissions.

10.      TAX STATUS

         Federal Taxes. Each series of the Trust is treated as a separate entity
for  federal  income  tax  purposes.  It  is  the  Fund'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,  diversification of its assets
and the distribution of its income to  shareholders.  If the Fund meets all such
requirements   and  distributes  to  its  shareholders  at  least  annually  all
investment  company  taxable  income  and net  capital  gain,  if any,  which it
receives,  the Fund will be relieved of the necessity of paying  federal  income
tax.  Because none of the Fund's income is expected to arise from dividends,  no
part of the  distributions  to its corporate  shareholders  will qualify for the
dividends-received deduction for corporations.  Any distribution from the excess
of the Fund's net long-term  capital gain over its net  short-term  capital loss
would be treated by  shareholders  as long-term  capital gain without  regard to
their holding periods for their Fund shares.

         Any dividend  declared by the Fund 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.

         For federal income tax purposes, the Fund is permitted to carry forward
a net realized capital loss in any year to offset its realized capital gains, if
any,  during  the eight  years  following  the year of the loss.  To the  extent
subsequent net realized capital gains are offset by such losses,  they would not
result in federal  income tax  liability  to the Fund and are not expected to be
distributed as such to shareholders. As of December 31, 1995, the Fund had a net
capital loss  carryforward of $276,063,  which  carryforward will expire between
2002 and 2003 if not utilized.

         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.

         Provided  that the Fund  qualifies  as a regulated  investment  company
("RIC") under the Code, it will not be required to pay any Massachusetts income,
corporate excise or franchise taxes.  Provided that the Fund qualifies as a RIC,
the Fund should also not be required to pay Delaware corporation income tax.

         It is possible that some states will exempt from tax that portion of an
ordinary  dividend  which  represents  interest  received  by the Fund on direct
obligations of the U.S. Government.  Therefore, the Fund will report annually to
its shareholders the percentage of interest income received during the preceding
year,  indicating  the source of such  income.  Each  shareholder  is advised to
consult his own tax adviser  regarding the tax status of distributions  from and
an investment in the Fund under applicable state or local tax law, including, in
those states or localities  that impose taxes on intangible  personal  property,
whether the  portion of the value of the Fund's  shares  attributable  to direct
obligations of the U.S. government may be exempt from such taxes.
    

                                      -14-
<PAGE>

   
         Redemptions  and  exchanges  of shares will  generally  not result in a
taxable  gain or loss to the extent the Fund  successfully  maintains a constant
net asset value per share of $1.00, but a loss may be recognized to the extent a
CDSC is imposed in connection with the redemption or exchange.

         Federal law requires that the Fund withhold 31% of reportable payments,
including dividends, 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 Fund 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,  or U.S.  corporations,  partnerships,  trusts or estates and who are
subject to U.S.  federal income tax.  Investors  other than U.S.  persons may be
subject to different U.S. tax treatment,  including a 30% U.S.  withholding  tax
(or  withholding  tax at a lower  treaty rate) on certain  dividends  treated as
ordinary  income.  The  description  above also does not address the special tax
rules  applicable  to certain  classes of  investors,  such as banks,  insurance
companies or  tax-exempt  entities.  Shareholders  should  consult their own tax
advisers on these matters and on state, local and other applicable tax laws.

11.      DESCRIPTION OF SHARES

   
         The Fund is one of two  separate  series  of the  Trust.  Pioneer  U.S.
Government  Money  Fund is also a  separate  series of the  Trust.  The  Trust's
Agreement  and  Declaration  of Trust permits the 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.  Currently,  the Trust  consists of the two series
named herein.  Pioneer U.S.  Government Money Fund is expected to be acquired by
the  Fund  on or  about  July 1,  1996  pursuant  to an  agreement  and  plan of
reorganization  approved by the Trustees.  The Trustees may establish additional
series of shares in the  future,  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  Agreement  and  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 three classes of shares of the Fund,  Class A, Class B and Class
C shares.  Each share of a class of the Fund  represents an equal  proportionate
interest in the assets of that Fund allocable to that class. Upon liquidation of
the Fund,  shareholders of each class of the Fund are entitled to share pro rata
in the Fund'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.
    

         Shareholders  are entitled to one vote for each share held and may vote
in the  election  of  Trustees  and on other  matters  submitted  to meetings of
shareholders.  Although  Trustees are not elected annually by the  shareholders,
shareholders have, under certain circumstances,  the right to remove one or more
Trustees. No amendment adversely affecting certain rights of shareholders may be
made to the Trust's  Agreement and  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 nonassessable by the Trust,  except as stated
below.

                                      -15-
<PAGE>

12.  CERTAIN LIABILITIES

   
         As a Delaware  business trust,  the Trust's  operations are governed by
its  Agreement  and  Declaration  of Trust  dated  March 7, 1995.  A copy of the
Trust's  Certificate  of Trust,  also dated  March 7, 1995,  is on file with the
Office of the Secretary of State of the State of Delaware.  Generally,  Delaware
business trust  shareholders  are not personally  liable for  obligations of the
Delaware business trust under Delaware law. The Delaware Business Trust Act (the
"Delaware  Act") provides that a shareholder of a Delaware  business trust shall
be entitled to the same  limitation  of liability  extended to  shareholders  of
private for-profit corporations.  The Trust's Agreement and Declaration of Trust
expressly  provides that the Trust has been organized under the Delaware Act and
that the Agreement and  Declaration  of Trust is to be governed by Delaware law.
It is nevertheless  possible that a Delaware  business trust, such as the Trust,
might become a party to an action in another state whose courts refused to apply
Delaware  law,  in which  case the  Trust's  shareholders  could be  subject  to
personal liability.
    

         To guard against this risk, the Agreement and  Declaration of Trust (i)
contains an express disclaimer of shareholder  liability for acts or obligations
of the Trust and provides  that notice of such  disclaimer  may be given in each
agreement,  obligation and  instrument  entered into or executed by the Trust or
its Trustees, (ii) 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 and (iii)  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
Trust shareholder  incurring financial loss beyond his or her investment because
of  shareholder  liability  is  limited  to  circumstances  in which  all of the
following  factors are present:  (1) a court refused to apply  Delaware law; (2)
the  liability  arose under tort law or, if not, no  contractual  limitation  of
liability  was in effect;  and (3) the Trust  itself would be unable to meet its
obligations.  In the light of Delaware  law, the nature of the Trust's  business
and  the  nature  of its  assets,  the  risk  of  personal  liability  to a Fund
shareholder is remote.

         The Agreement and 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 Agreement and 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 Fund is  determined
twice daily,  on each day the New York Stock Exchange (the  "Exchange") is open,
at 12:00  noon  Eastern  Time  and as of the  close of  regular  trading  on the
Exchange.  As of the date of this  Statement of  Additional  Information,  these
institutions  are open for  business  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 Fund is also  determined  twice  daily,  at
12:00 noon Eastern Time and as of the close of regular  trading on the Exchange,
if the Exchange was open,  on any other day in which the level of trading in its
portfolio  securities is sufficiently  high that the current net asset value per
share  might be  materially  affected  by changes in the value of its  portfolio
securities.  On any day in which no  purchase  orders for the shares of the Fund
become effective and no shares are tendered for redemption, the Fund's net asset
value per share may not be determined.
    

                                      -16-
<PAGE>

   
         The net asset  value per share of each class of the Fund is computed by
taking the amount of the value of all of a Fund's  assets  attributable  to that
class,  less its liabilities  attributable to that class, and dividing it by the
number of  outstanding  shares of that class.  For purposes of  determining  net
asset  value,  expenses of each class of the Fund are accrued  twice  daily,  at
12:00 noon Eastern Time and as of the close of regular  trading on the Exchange,
and taken into account.

         Except as set forth in the following  paragraph,  the Fund's  portfolio
investments  are valued on each business day on the basis of amortized  cost, if
the Board of Trustees  determines  in good faith that such  method  approximates
fair value.  This  technique  involves  valuing an  instrument  at its cost and,
thereafter,  assuming a constant  amortization  to maturity  of any  discount or
premium,  regardless of the impact of  fluctuating  interest rates on the market
value of the instrument.  While this method provides certainty in valuation,  it
may result in periods  during which value,  as determined by amortized  cost, is
higher or lower than the price the Fund would receive if it sold the investment.
During  periods of  declining  interest  rates,  the yield on shares of the Fund
computed as described below may tend to be higher than a like  computation  made
by a fund with identical  investments utilizing a method of valuation based upon
market  prices  and  estimates  of  market  prices  for  all  of  its  portfolio
investments.  Thus, if the use of amortized cost by the Fund resulted in a lower
aggregate  portfolio  value on a particular  day, a prospective  investor in the
Fund would be able to obtain a somewhat  higher  yield  than would  result  from
investment in a fund utilizing solely market values. The converse would apply in
a period of rising interest rates.
    

         Standby  commitments  will be valued at zero in  determining  net asset
value.  "When-issued"  securities will be valued at the value of the security at
the time the commitment to purchase is entered into.

   
         The  valuation  of the Fund's  portfolio  investments  based upon their
amortized cost and the concomitant  expectation to maintain the Fund's per share
net asset value of $1.00 is  permitted  in  accordance  with Rule 2a-7 under the
1940 Act pursuant to which the Fund must adhere to certain  conditions which are
described in detail in the Prospectus.  The Fund must maintain a dollar-weighted
average  portfolio  maturity of 90 days or less. The maturities of variable rate
demand  instruments held in the Fund's portfolio will be deemed to be the longer
of the  demand  period or the  period  remaining  until the next  interest  rate
adjustment,  although  stated  maturities  may be in  excess  of one  year.  The
Trustees  have  established  procedures  designed  to  stabilize,  to the extent
reasonably  possible,  the  price  per  share of each  class of the Fund for the
purpose  of  maintaining  sales and  redemptions  at a single  value.  It is the
intention of the Fund to maintain each class' per-share net asset value of $1.00
but there can be no assurance of this.  Such  procedures  will include review of
the Fund's  portfolio  holdings by the Trustees,  at such  intervals as they may
deem  appropriate,  to  determine  whether  the Fund's net asset value per class
calculated by using available  market  quotations  deviates from $1.00 per share
and,  if so,  whether  such  deviation  may result in  material  dilution  or is
otherwise unfair to existing  shareholders.  In the event the Trustees determine
that such a deviation exists, they have agreed to take such corrective action as
they regard as necessary and appropriate,  including:  (i) the sale of portfolio
instruments  prior to maturity to realize  capital gains or losses or to shorten
average portfolio maturity;  (ii) withholding dividends;  (iii) redeeming shares
in kind;  or (iv)  establishing  a net asset value per share by using  available
market quotations.
    

                                      -17-
<PAGE>

14.      SYSTEMATIC WITHDRAWAL PLAN

   
         The  Systematic  Withdrawal  Plan  ("SWP")  is  designed  to  provide a
convenient  method of receiving fixed payments at regular  intervals from shares
of the Fund deposited by the applicant under this SWP.  Withdrawals from Class B
and Class C share accounts are limited to 10% of the value of the account at the
time the plan is  implemented if a CDSC applies (see the  Prospectus).  You must
deposit or purchase for deposit with PSC shares of the Fund having a total value
of not less than  $10,000.  Periodic  payments of $50 or more will be  deposited
monthly or quarterly  directly into a bank account designated by you, or will be
sent to you, or any person designated by you.

         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.  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 capital.

         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 Fund.

15.      INVESTMENT RESULTS

         From  time to time,  the Fund will  provide  yield  quotations  for its
shares.  These quotations are calculated by standard  methods  prescribed by the
SEC and may from time to time be used in the  Fund's  Prospectus,  Statement  of
Additional   Information,   advertisements,   shareholder   reports   or   other
communications  to shareholders.  However,  these yield quotations should not be
considered as representative of the performance of the Fund in the future since,
unlike  some bank  deposits or other  investments  which pay a fixed yield for a
stated  period of time,  the  yields  of the Fund  will vary  based on the type,
quality and maturities of the securities held in its portfolio,  fluctuations in
short-term interest rates and changes in its expenses.

         The Fund's yield quotations are computed using the appropriate  figures
for a particular class as follows: the net change,  exclusive of capital changes
(i.e.,  realized  gains and losses from the sale of  securities  and  unrealized
appreciation  and  depreciation),  in the value of a  hypothetical  pre-existing
Class  A,  Class B or  Class C  account  having a  balance  of one  share at the
beginning  of  the  seven-day   base  period  is  determined  by  subtracting  a
hypothetical charge reflecting expense deductions from the hypothetical account,
and dividing the net change in value by the value of the share at the  beginning
of the base period. This base period return is then multiplied by 365/7 with the
resulting yield figure carried to the nearest 100th of 1%. The  determination of
net change in account value  reflects the value of additional  shares  purchased
with dividends from the original share,  dividends declared on both the original
share and any such additional shares, and all fees that are charged to the Fund,
in  proportion to the length of the base period and the Fund's  average  account
size (with respect to any fees that vary with the size of an account).
    

                                      -18-
<PAGE>

   
         The Fund may also advertise  quotations of effective  yield.  Effective
yield is computed by compounding the unannualized  base period return determined
as in the preceding paragraph by adding 1 to the base period return, raising the
sum to a power equal to 365 divided by 7, and  subtracting  one from the result,
according to the following formula:

              Effective Yield = (base period return + 1) 365/7 - 1

         The  yield and  effective  yield of the Fund for the  seven-day  period
    
ended December 31, 1995 is as follows:

                     Before Expense Limitation      After Expense Limitation

   
                   Effective     Effective        Effective     Effective
                   Yield         Yield              Yield         Yield

Class A Shares       4.63%         4.75%            4.91%         5.03%

Class B Shares       4.34%         3.88%            4.91%         5.03%


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


         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:

          .    net asset value prices for all Pioneer mutual funds;

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

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

          .    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,  and  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 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.

                                      -19-
<PAGE>

16.      FINANCIAL STATEMENTS

   
         The Fund's  financial  statements  for the year ended December 31, 1995
are included in the Fund's Annual Report dated  December 31, 1995,  which report
is  incorporated  by  reference  into  and is  attached  to  this  Statement  of
Additional  Information  in  reliance  upon the report of Arthur  Andersen  LLP,
independent public  accountants,  as experts. A copy of the Fund's Annual Report
may  also  be  obtained  without  charge  by  calling  Shareholder  Services  at
1-800-225-6292  or by written  request to the Fund at 60 State  Street,  Boston,
Massachusetts 02109.
    












                                      -20-
<PAGE>


                                   APPENDIX A
                    Description of Commercial Paper Ratings1

                         Moody's Investors Service, Inc.

Commercial Paper

         P-1: P-1 is the highest  commercial  paper rating  assigned by Moody's.
Among the factors  considered by Moody's in assigning ratings are the following:
(i) evaluation of the management of the issuer;  (ii) economic evaluation of the
issuer's industry or industries and an appraisal of speculative-type risks which
may be inherent in certain areas;  (iii) evaluation of the issuer's  products in
relation to competition and customer acceptance;  (iv) liquidity; (v) amount and
quality of long-term  debt;  (vi) trend of earnings  over a period of ten years;
(vii) financial strength of any parent company and the relationships which exist
with  the  issuer;  and  (viii)  recognition  by  management  of the  issuer  of
obligations  which may be  present  or may arise as a result of public  interest
questions and preparations to meet such obligations.

                         Standard & Poor's Ratings Group

Commercial Paper

         A-1:   Commercial   paper  rated  A-1  or  better  has  the   following
characteristics:  (i) the liquidity ratio of its issuer is adequate to meet cash
requirements; (ii) its issuer has outstanding debt rated AA or better; (iii) the
issuer has access to at least two additional sources of borrowing;  and (iv) the
issuer's  basic  earnings and cash flow have an upward trend with allowance made
for unusual circumstances. Typically, the issuer's industry is judged to be well
established and the issuer has a strong position within the industry.







   
1The  ratings  indicated  herein  are  believed  to be the most  recent  ratings
available  at the  date of this  Statement  of  Additional  Information  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 Fund's fiscal year-end.
    





                                      -21-
<PAGE>

                             Pioneer Cash Reserves A
<TABLE>
<CAPTION>

  Date        Initial Investment    Offering Price    Sales Charge   Shares Purchased    Net Asset Value    Initial Net
                                                        Included                            Per Share          Value
 <S>                 <C>                <C>               <C>            <C>                <C>              <C>    
 6/22/87             $10,000            $1.0000           0.00%          10,000.000         $1.0000          $10,000


                     Dividends and Capital Gains Reinvested

                                 Value of Shares

  Date        From Investment       From Cap. Gains     From Dividends              Total Value
                                      Reinvested          Reinvested
<C>                  <C>                  <C>                <C>                      <C>    
12/31/87             $10,000              $0                 $348                     $10,348
12/31/88             $10,000              $0                $1,077                    $11,077
12/31/89             $10,000              $0                $2,052                    $12,052
12/31/90             $10,000              $0                $2,985                    $12,985
12/31/91             $10,000              $0                $3,672                    $13,672
12/31/92             $10,000              $0                $4,091                    $14,091
12/31/93             $10,000              $0                $4,438                    $14,438
12/31/94             $10,000              $0                $4,954                    $14,954
12/31/95             $10,000              $0                $5,727                    $15,727


</TABLE>






                                      -22-
<PAGE>
                             Pioneer Cash Reserves B
<TABLE>
<CAPTION>

  Date        Initial Investment      Offering Price      Sales Charge       Shares Purchased       Net Asset Value     Initial Net
                                                            Included                                   Per Share           Value
<S>                  <C>                  <C>                <C>                <C>                    <C>               <C>    
 3/31/95             $10,000              $1.0000            0.00%              10,000.000             $1.0000           $10,000


                     Dividends and Capital Gains Reinvested

                                 Value of Shares

  Date        From Investment       From Cap. Gains        From Dividends       Total Value
                                      Reinvested             Reinvested
<S>                  <C>                  <C>                   <C>                 <C> 
12/31/95             $10,000              $0                    $328                9928




</TABLE>






                                      -23-
<PAGE>

                             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 



                                      -24-
<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



                                      -25-
<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.



                                      -26-
<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

















                                      -27-
<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



                                      -28-
<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




                                      -29-
<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




                                      -30-
<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
                                                                                



                                      -31-
<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
     


                                      -32-
<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
          
     


                                      -33-
<PAGE>
     
     
   
                                   APPENDIX B
                            Other Pioneer Information

         The  Pioneer  group of mutual  funds was  established  in 1928 with the
creation  of Pioneer  Fund.  Pioneer  is one of the oldest and most  experienced
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.

         Total assets of all Pioneer  mutual  funds at December  31, 1995,  were
approximately $12 billion  representing  982,369 shareholder  accounts - 637,060
non-retirement accounts and 345,309 retirement accounts.
    












                                      -34-
<PAGE>

                           PIONEER MONEY MARKET TRUST
                       Pioneer U.S. Government Money Fund
                                 Class A Shares

                                 60 State Street
                           Boston, Massachusetts 02109

   
                       STATEMENT OF ADDITIONAL INFORMATION
                                 April 29, 1996


         This  Statement of  Additional  Information  is not a  Prospectus,  but
should be read in conjunction with the Prospectus (the "Prospectus") dated April
29, 1996 of Pioneer U.S.  Government  Money Fund (the  "Fund").  The Fund is one
series of Pioneer Money Market 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 Fund's Annual Report for the fiscal year ended December 31, 1995 is attached
to this Statement of Additional  Information and is hereby  incorporated in this
Statement of Additional Information by reference.
    

                                TABLE OF CONTENTS
                                                                        Page

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

Appendix A...............................................................15
Appendix B...............................................................26

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

        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 identifies the Fund's investment objective and principal
investment policies. Other investment policies and a further description of some
of the policies described in the Prospectus are set forth below.

         The following  policies and limitations  supplement  those discussed in
the  Prospectus.  Whenever an investment  policy or limitation  states a maximum
percentage  of the Fund's  assets that may be  invested in any  security or sets
forth a policy regarding  quality  standards,  such standard or other limitation
shall be determined  immediately after and as a result of the Fund's investment.
Accordingly,  any later increase or decrease  resulting from a change in values,
net assets or other  circumstances will not be considered in determining whether
the investment complies with the Fund's investment objectives and policies.

         Investment Restrictions. The following numerical list sets forth all of
the  fundamental   investment   restrictions   applicable  to  the  Fund.  These
restrictions  cannot be changed unless a majority of the outstanding  securities
of the Fund approves the change. As used in the Prospectus and this 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 Fund may not:
    

         (1) except with respect to  investments  in obligations of (a) the U.S.
government,  its agencies,  authorities  or  instrumentalities  and (b) domestic
banks,  purchase  any security if, as a result (i) more than 5% of the assets of
the Fund would be in the securities of any one issuer,  or (ii) more than 25% of
its assets would be in a particular industry;

   
         (2) borrow money,  except from banks for  extraordinary  purposes or to
meet redemptions in amounts not exceeding 33 1/3% of its total assets (including
the amount borrowed). The Fund does not intend to borrow money during the coming
year;
    

         (3) make short sales of securities;

         (4) purchase securities on margin;

         (5) write,  purchase or otherwise invest in any put, call,  straddle or
spread  option or buy or sell real  estate,  commodities  or  commodity  futures
contracts or invest in oil, gas or mineral exploration or development programs;

         (6) make  loans to any  person,  except by (a) the  purchase  of a debt
obligation  in  which  the Fund is  permitted  to  invest  and (b)  engaging  in
repurchase agreements;

         (7) purchase the securities of other investment companies or investment
trusts,  unless  they  are  acquired  as  part  of a  merger,  consolidation  or
acquisition of assets;

         (8)  act  as an  underwriter,  except  as it  may  be  deemed  to be an
underwriter in a sale of restricted securities;

         (9)  invest in  companies  for the  purpose  of  exercising  control or
management; or

         (10) issue  senior  securities,  except  that the  issuance of multiple
classes of shares,  in  accordance  with a statute,  regulation  or order of the
Securities  and  Exchange  Commission,  shall not  constitute  the issuance of a
senior security.

   
         In  addition,  in order to  comply  with  certain  state  statutes  and
non-fundamental  policies of the Fund, the Fund will not (i) pledge, mortgage or
hypothecate its portfolio  securities if at the time of such action the value of
the  securities so pledged,  mortgaged or  hypothecated  would exceed 10% of the
value  of the  Fund,  (ii)  commit  more  than  10% of its  assets  to  illiquid
investments,  such as repurchase agreements that mature in more than seven days,
(iii)  invest  more  than  5%  of  its  assets  in  companies  which,  including
predecessors,  have a record of less than three years continuous operation, (iv)
invest in warrants,  (v) purchase or retain the  securities of any issuer if any
officer  or  Trustee  of the Fund or its  investment  adviser  is an  officer or
director  of such  issuer  and  beneficially  owns  more  than  1/2 of 1% of the
securities  of such issuer and all of the  officers and the Trustees of the Fund
and the Fund's investment 
    


                                      -2-
<PAGE>

   
adviser together own more than 5% of the securities of such issuer,  (vi) buy or
sell real estate,  including real estate limited  partnerships,  except that the
Fund may acquire or lease office space for its own use,  invest in securities of
issuers that invest in real estate or interests  therein,  invest in  securities
that  are  secured  by real  estate  or  interests  therein,  purchase  and sell
mortgage-related  securities and hold and sell real estate  acquired by the Fund
as a result of the  ownership  of  securities  or (vii)  invest  in oil,  gas or
mineral exploration or development programs or leases. The term "person" as used
in fundamental  investment  restriction  no. 6 includes  institutions as well as
individuals.  Policies in this paragraph may be changed by the Trustees  without
shareholder approval or notification.

         See the  Prospectus for a discussion of certain  additional  regulatory
requirements applicable to the Fund.

2.       MANAGEMENT OF THE FUND

         The  Fund's  Board of  Trustees  provides  broad  supervision  over the
affairs of the Fund.  The  officers of the Fund are  responsible  for the Fund's
operations.  The Trustees and  executive  officers of the Fund are listed below,
together  with  their  principal  occupations  during  the past five  years.  An
asterisk  indicates those Trustees who are interested persons of the Fund 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 (Russian timber joint venture);  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 Fund).

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.

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
One Boston Place, Suite 2635, Boston, MA 02108
         President,  Newbury,  Piret & Company, Inc. (merchant banking firm) and
Trustee of all of the Pioneer mutual funds.
    

                                      -3-
<PAGE>

   
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 Fund) 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.

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 Fund) where he most recently served as junior partner.

SHERMAN B. RUSS, Vice President,  DOB:   July 1937
         Senior Vice  President  of PMC;  Vice  President  of Pioneer Bond Fund,
Pioneer America Income Trust and Pioneer Interest Shares, Inc.

         The Fund's Amended and Restated  Declaration of Trust (the "Declaration
of Trust") provides that the holders of two-thirds of its outstanding shares may
vote to  remove  a  Trustee  of the Fund 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
Fund'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.


                                      -4-
<PAGE>


                                           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 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.

   
         To the  knowledge of the Fund,  no officer or Trustee of the Fund owned
5% or more of the issued and outstanding shares of PGI on March 31, 1996, except
Mr. Cogan who then owned approximately 14% of such shares.

         At March 31,  1996,  the Trustees and officers of the Fund owned in the
aggregate  less than 1% of the  outstanding  securities of the Fund. As of March
31, 1996, PGI-Rollover IRA Custodian for George E. Siek, Sr. owned approximately
6.96% of Pioneer U.S. Government Money Fund's total assets.
    

                                      -5-
<PAGE>

   
         Compensation  of Officers and Trustees.  Commencing on January 1, 1996,
the Fund 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 the
Fund, estimated to be approximately $26 for 1996. In addition, the Fund will pay
a per meeting fee of $120 to each Trustee who is not  affiliated  with PGI, PMC,
PFD or PSC.  The Fund  also will pay an annual  committee  participation  fee to
Trustees who serve as members of committees  established to act on behalf of one
or more of the Pioneer  mutual  funds.  Committee  fees will be allocated to the
Fund on the basis of the Fund'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 Audit Committee members and the Audit Committee
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
Pricing  Committee  members and the Pricing  Committee  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 were reimbursed to the Fund under
its management contract.

         The Fund pays no salaries or compensation  to any of its officers.  For
the fiscal period ended December 31, 1995, the Fund paid an annual trustees' fee
of $100, and $1,000 plus expenses per meeting attended,  to each Trustee who was
not  affiliated  with PGI,  PMC, PFD or PSC and paid an annual  trustees' fee of
$500 plus  expenses to each Trustee  affiliated  with PGI,  PMC, PFD or PSC. Any
such fees and expenses paid to  affiliates or interested  persons of PMC, PFD or
PSC were reimbursed to the Fund under its Management Contract.

         The following  table provides  information  regarding the  compensation
paid by the Fund and other Pioneer Funds to the Trustees for their services.
    

                                             Pension or
                                             Retirement           Total
                                              Benefits         Compensation
                             Aggregate       Accrued as       from Fund and
                           Compensation        Part of        ioneer Family
Name of Trustee           from the Fund*   Fund's Expenses     of Funds**

   
John F. Cogan, Jr.***        $  500             $0             $11,000
Richard H. Egdahl, M.D.       3,155              0             $63,315
Margaret B.W. Graham          3,155              0             $62,398
John W. Kendrick              3,155              0             $62,398
Marguerite A. Piret           3,897              0             $76,704
David D. Tripple***             500              0             $11,000
Stephen K. West               3,492              0             $68,180
John Winthrop                 3,680              0             $71,199

*    As of the Fund's fiscal year end.
**   As of December  31, 1995  (calendar  year end for all Pioneer  Funds listed
     above).
***  All fees paid by the Fund to  "interested"  Trustees are  reimbursed to the
     Fund by PMC.
    



3.  INVESTMENT ADVISER

   
         The  Fund  has   contracted   with  PMC,  60  State   Street,   Boston,
Massachusetts, to act as its investment adviser. The term of the contract is one
year and it is  renewable  annually  by the vote of a  majority  of the Board of
Trustees of the Fund  (including a majority of the Board of Trustees who are not
parties to the contract or  interested  persons of any such  parties).  The vote
must be 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 vote of its
    


                                      -6-
<PAGE>

   
Board  of  Directors  or  Trustees  or a  majority  of  its  outstanding  voting
securities and 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 0.40% per annum of the Fund's  average daily net assets.  The fee
is  normally  computed  daily and paid  monthly.  PMC has  agreed  not to impose
management fees for the Fund and if necessary to limit or otherwise reduce other
operating  expenses  to the extent  needed to limit the  expenses of the Fund in
accordance  with the  schedule  set  forth  in the  Prospectus  under  Note 2 to
"Expense  Information."  PMC's  agreement is voluntary  and temporary and may be
revised or terminated at any time.  The purpose of this policy is to enhance the
Fund's dividend yield during the period when, because of its smaller size, fixed
expenses have a more significant impact on yield.

         During  the  fiscal  years  ended  December  31,  1993,  1994 and 1995,
pursuant to the expense  limitation  discussed  above,  the management fees were
reduced by $92,361, $117,274 and $119,725, respectively,  resulting in no actual
management fees paid during each of the three fiscal years.
    

4.       PRINCIPAL UNDERWRITER

   
         PFD serves as the principal underwriter for the Fund in connection with
the  continuous  offering of Fund shares.  During the Fund's three most recently
completed  fiscal  years,  no  underwriting  commissions  were paid to PFD.  PFD
commenced service as the Fund's principal underwriter as of March 31, 1995.

         The  Fund  entered  into  an  Underwriting   Agreement  with  PFD.  The
Underwriting  Agreement will continue from year to year if annually  approved by
the Trustees.  The Underwriting  Agreement  provides that PFD will bear expenses
for the distribution of the Fund's shares,  except for expenses  incurred by PFD
for which it is  reimbursed by the Fund under the Rule 12b-1  distribution  plan
applicable to the Class A shares.

         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 Fund.  PFD also pays certain  expenses in connection  with the
distribution of the Fund'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 Fund
bears the cost of registering its shares under federal and state  securities law
and the laws of certain foreign countries.

         The Fund 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 Fund.

         The Fund will not generally issue shares for  consideration  other than
cash.  At  the  Fund's  sole  discretion,  however,  it  may  issue  shares  for
consideration  other than cash in  connection  with a bona fide  reorganization,
statutory  merger,  or other  acquisition  of portfolio  securities  (other than
municipal  debt  securities  issued  by state  political  subdivisions  or their
agencies or  instrumentalities)  provided (i) the securities meet the investment
objectives  and policies of the Fund;  (ii) the  securities  are acquired by the
Fund 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.  An exchange of securities for Fund
shares may be a taxable transaction to the shareholder.

         The redemption price of shares of beneficial  interest of the Fund may,
at PMC's  discretion,  be paid in cash or  portfolio  securities.  The Fund has,
however,  elected to be governed  by Rule 18f-1  under the 1940 Act  pursuant to
which the Fund is obligated to redeem  shares solely in cash up to the lesser of
$250,000  or 1% of the Fund's net asset value  during any 90-day  period for any
one shareholder. Should the amount of redemptions by any shareholder exceed such
limitation,  the Fund will have the  option of  redeeming  the excess in cash or
portfolio securities.  In the latter case, the securities are taken at the value
employed in determining  the Fund's net asset value. A shareholder  whose shares
are  redeemed  in-kind may incur  brokerage  charges in selling  the  securities
received  in-kind.  The selection of such securities will be made in such manner
as the Board deems fair and reasonable.
    

                                      -7-
<PAGE>

5.       DISTRIBUTION PLANS

   
         The Fund has  adopted a plan of  distribution  pursuant  to Rule  12b-1
promulgated by the Securities and Exchange Commission (the "SEC") under the 1940
Act with respect to Class A shares (the "Class A Plan" or the "Plan").

         Class A Plan.  Pursuant to the Class A Plan the Fund may  reimburse PFD
for its expenditures in financing any activity  primarily  intended to result in
the sale of the Class A Plan 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 Fund pursuant to
the Class A Plan are  accrued  daily at a rate  which may not  exceed the annual
rate of 0.15% of the Fund's  average  daily net assets  attributable  to Class A
shares.

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

         No  interested  person of the Fund,  nor any Trustee of the Fund who is
not an  interested  person of the Fund,  has any  direct or  indirect  financial
interest in the  operation of the Plan 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 Plan by the Fund and except to the
extent certain officers may have an interest in PFD's ultimate parent, PGI.

         The Plan was  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 Fund, as defined in the 1940 Act (none of whom has or
have any direct or indirect  financial  interest in the  operation  of the Plan)
(the "Qualified  Trustees"),  cast in person at a meeting called for the purpose
of voting on the Plan.  In  approving  the Plan,  the  Trustees  identified  and
considered a number of potential benefits which the Plan may provide.  The Board
of Trustees  believes that there is a reasonable  likelihood  that the Plan will
benefit the Fund and its current and future  shareholders.  Under its terms, the
Plan remains in effect from year to year provided such  continuance  is approved
annually by vote of the Trustees in the manner described above. The 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,  and material  amendments of the Plan must also be
approved by the Trustees in the manner  described  above. On March 10, 1995, the
Board of Trustees approved an amendment to the Fund's Class A Plan,  authorizing
PFD, in its capacity as principal  underwriter of the Fund's shares,  to receive
compensation  from the Fund  pursuant  to the Class A Plan.  Under the  original
Class A Plan,  PFD served as  servicing  agent for the Fund with  respect to the
Plan. The Board of Trustees  determined  that this amendment would not result in
an increase of the annual percentage  limitation of average net assets which may
be spent by the Fund for the services described with respect to the Fund's Class
A shares in the Class A Plan.  The 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 Fund and have no direct or indirect financial interest
in the  operations  of the Plan,  or by a vote of a majority of the  outstanding
voting  securities.  The Plan will  automatically  terminate in the event of its
assignment  (as defined in the 1940 Act). In the Trustees'  quarterly  review of
the Plan, they will consider the Plan's continued  appropriateness and the level
of compensation they provide.

         During the fiscal year ended December 31, 1995, the Fund incurred total
distribution fees pursuant to the Class A Plan of $37,232.
    

         Distribution  fees  were  paid by the Fund to PFD in  reimbursement  of
expenses  related to  servicing  of  shareholder  accounts  and to  compensating
dealers and sales personnel.

6.       SHAREHOLDER SERVICING/TRANSFER AGENT

   
         The  Fund  has   contracted   with  PSC,  60  State   Street,   Boston,
Massachusetts,  to act as shareholder  services and transfer agent for the Fund.
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.
    

                                      -8-
<PAGE>

   
         Under the terms of its contract with the Fund, PSC services shareholder
accounts,  and  its  duties  include:  (i)  processing  sales,  redemptions  and
exchanges of shares of the Fund; (ii)  distributing  dividends and capital gains
associated with Fund portfolio  accounts;  and (iii) maintaining account records
and responding to shareholder inquiries.  PSC handles all routine communications
with  shareholders  but obtains data  processing and  operational  services from
Advanced Information Service Company of Boston, Massachusetts.

         PSC receives an annual fee of $28.00 per  shareholder  account from the
Fund 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.
    

7.       CUSTODIAN

   
         Brown  Brothers  Harriman & Co.  (the  "Custodian"),  40 Water  Street,
Boston,  Massachusetts  02109,  is the  custodian  of  the  Fund's  assets.  The
Custodian's responsibilities include safekeeping and controlling the Fund's cash
and  securities,  handling the receipt and delivery of securities and collecting
interest  and  dividends  on the  Fund's  investments.  The  Custodian  does not
determine the  investment  policies of the Fund or decide which  securities  the
Fund will buy or sell. The Fund 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.

         Pursuant to a separate agreement with the Custodian, the Custodian also
provides certain accounting  services to the Fund,  including the calculation of
yield for the Fund.
    

8.       INDEPENDENT PUBLIC ACCOUNTANTS

   
         Arthur Andersen LLP, One  International  Place,  Boston,  Massachusetts
02110, is the Fund's independent public  accountants,  providing audit services,
tax  return  review  and  assistance  and  consultation   with  respect  to  the
preparation of filings with the SEC.
    

9.       PORTFOLIO TRANSACTIONS

   
         The Fund intends to fully manage its  portfolios  by buying and selling
securities,  as  well  as  holding  securities  to  maturity.  In  managing  its
portfolio,  the Fund 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.

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

         Decisions relating to the purchase and sale of securities for the Fund,
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  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

                                      -9-
<PAGE>

   
concession,  and the prices at which  securities are purchased and sold from and
to dealers  include a dealer's  mark-up or mark-down.  PMC attempts to negotiate
with  underwriters  to decrease the  commission or concession for the benefit of
the Fund.  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
have furnished statistical research and other information or services to PMC and
the Fund.  Management  believes that no exact dollar value can be calculated for
such services.

         During  the  fiscal  years  ended  December  31,  1995,  1994 and 1993,
respectively, the Fund paid no brokerage or underwriting commissions.
    

10.      TAX STATUS

   
         Federal Taxes. Each series of the Trust is treated as a separate entity
for  federal  income  tax  purposes.  It  is  the  Fund'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,  diversification of its assets
and the distribution of its income to  shareholders.  If the Fund meets all such
requirements   and  distributes  to  its  shareholders  at  least  annually  all
investment  company  taxable  income  and net  capital  gain,  if any,  which it
receives,  the Fund will be relieved of the necessity of paying  federal  income
tax.  Because none of the Fund's income is expected to arise from dividends,  no
part of the  distributions  to its corporate  shareholders  will qualify for the
dividends-received deduction for corporations.  Any distribution from the excess
of the Fund's net long-term  capital gain over its net  short-term  capital loss
would be treated by  shareholders  as long-term  capital gain without  regard to
their holding periods for their Fund shares.

         Any dividend  declared by the Fund 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.

         For federal income tax purposes, the Fund is permitted to carry forward
a net realized capital loss in any year to offset its realized capital gains, if
any,  during  the eight  years  following  the year of the loss.  To the  extent
subsequent net realized capital gains are offset by such losses,  they would not
result in federal  income tax  liability  to the Fund and are not expected to be
distributed as such to shareholders.
    

         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.

   
         Provided  that the Fund  qualifies  as a regulated  investment  company
("RIC") under the Code, it will not be required to pay any Massachusetts income,
corporate excise or franchise taxes.  Provided that the Fund qualifies as an RIC
and meets certain income source requirements under Delaware Law, the Fund should
also not be required to pay Delaware corporation income tax.

         It is possible that some states will exempt from tax that portion of an
ordinary  dividend  which  represents  interest  received  by the Fund on direct
obligations of the U.S. Government.  Therefore, the Fund will report annually to
its shareholders the percentage of interest income received during the preceding
year,  indicating  the source of such  income.  Each  shareholder  is advised to
consult his own tax adviser  regarding the tax status of distributions  from and
an investment in the Fund under applicable state or local tax law, including, in
those states or localities  that impose taxes on intangible  personal  property,
whether the  portion of the value of the Fund's  shares  attributable  to direct
obligations of the U.S. government may be exempt from such taxes.

         Redemptions  and  exchanges  of shares  will  generally  not  result in
taxable  gain or loss to the extent the Fund  successfully  maintains a constant
net asset value per share of $1.00, but a loss may be recognized to the extent a
CDSC is imposed,  i.e.,  in connection  with the  redemption or exchange of Fund
shares that were acquired by exchange subject to a CDSC.

         Federal law requires that the Fund withhold 31% of reportable payments,
including dividends, 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 
    


                                      -10-
<PAGE>

   
withholding,  or that they are  exempt  from  backup  withholding.  The Fund 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,  or U.S.  corporations,  partnerships,  trusts or estates and who are
subject to U.S.  federal income tax.  Investors  other than U.S.  persons may be
subject to different U.S. tax treatment,  including 30% U.S. withholding tax (or
withholding tax at a lower treaty rate) on certain dividends treated as ordinary
income.  The  description  above also does not  address  the  special  tax rules
applicable to certain classes of investors,  such as banks,  insurance companies
or tax-exempt  entities.  Shareholders  should consult their own tax advisers on
these matters and on state, local and other applicable tax laws.

11.      DESCRIPTION OF SHARES

         The Fund is one of two  separate  series  of the  Trust.  Pioneer  Cash
Reserves Fund is also a separate series of the Trust. The Trust's  Agreement and
Declaration  of Trust permits the 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.  Currently,  the Trust consists of the two series named
herein.  The Fund is expected to be acquired by Pioneer Cash Reserves Fund on or
about July 1, 1996 pursuant to an agreement and plan of reorganization  approved
by the Trustees.  The Trustees may establish  additional series of shares in the
future,  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 Agreement and Declaration of Trust further authorizes the Trustees to
classify or reclassify any series of the shares into one or more classes.
    

         Shareholders  are entitled to one vote for each share held and may vote
in the  election  of  Trustees  and on other  matters  submitted  to meetings of
shareholders.  Although  Trustees are not elected annually by the  shareholders,
shareholders have, under certain circumstances,  the right to remove one or more
Trustees. No amendment adversely affecting certain rights of shareholders may be
made to the Trust's  Agreement and  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 nonassessable by the Trust,  except as stated
below.

12.  CERTAIN LIABILITIES

   
         As a Delaware  business trust,  the Trust's  operations are governed by
its  Agreement  and  Declaration  of Trust  dated  March 7, 1995.  A copy of the
Trust's  Certificate  of Trust,  also dated  March 7, 1995,  is on file with the
Office of the Secretary of State of the State of Delaware.  Generally,  Delaware
business trust  shareholders  are not personally  liable for  obligations of the
Delaware business trust under Delaware law. The Delaware Business Trust Act (the
"Delaware  Act") provides that a shareholder of a Delaware  business trust shall
be entitled to the same  limitation  of liability  extended to  shareholders  of
private for-profit corporations.  The Trust's Agreement and Declaration of Trust
expressly  provides that the Trust has been organized under the Delaware Act and
that the Agreement and  Declaration  of Trust is to be governed by Delaware law.
It is nevertheless  possible that a Delaware  business trust, such as the Trust,
might become a party to an action in another state whose courts refused to apply
Delaware  law,  in which  case the  Trust's  shareholders  could be  subject  to
personal liability.
    

         To guard against this risk, the Agreement and  Declaration of Trust (i)
contains an express disclaimer of shareholder  liability for acts or obligations
of the Trust and provides  that notice of such  disclaimer  may be given in each
agreement,  obligation and  instrument  entered into or executed by the Trust or
its Trustees, (ii) 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 and (iii)  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
Trust shareholder  incurring financial loss beyond his or her investment because
of  shareholder  liability  is  limited  to  circumstances  in which  all of the
following  factors are present:  (1) a court refused to apply  Delaware law; (2)
the  liability  arose under tort law or, if not, no  contractual  limitation  of
liability  was in effect;  and (3) the Trust  itself would be unable to meet its
obligations.  In the light of Delaware  law, the nature of the Trust's  business
and  the  nature  of its  assets,  the  risk  of  personal  liability  to a Fund
shareholder is remote.

                                      -11-
<PAGE>

         The Agreement and 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 Agreement and 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 the Fund is determined twice daily, on
each day the New York Stock  Exchange  (the  "Exchange")  is open, at 12:00 noon
Eastern Time and as of the close of regular  trading on the Exchange.  As of the
date of this Statement of Additional  Information,  these  institutions are open
for business  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 the Fund is
also  determined  twice daily, at 12:00 noon Eastern Time and as of the close of
regular  trading on the Exchange,  if the Exchange was open, on any other day in
which the level of trading in its portfolio securities is sufficiently high that
the current net asset value per share might be materially affected by changes in
the value of its portfolio  securities.  On any day in which no purchase  orders
for the  shares of the Fund  become  effective  and no shares are  tendered  for
redemption, the Fund's net asset value per share may not be determined.

         The net asset  value per share of the Fund is  computed  by taking  the
amount of the  value of all of the  Fund's  assets,  less its  liabilities,  and
dividing it by the number of outstanding shares. For purposes of determining net
asset value, expenses are accrued twice daily, at 12:00 noon Eastern Time and as
of the close of regular trading on the Exchange, and taken into account.

         Except as set forth in the following  paragraph,  the Fund's  portfolio
investments  are valued on each business day on the basis of amortized  cost, if
the Board of Trustees  determines  in good faith that such  method  approximates
fair value.  This  technique  involves  valuing an  instrument  at its cost and,
thereafter,  assuming a constant  amortization  to maturity  of any  discount or
premium,  regardless of the impact of  fluctuating  interest rates on the market
value of the instrument.  While this method provides certainty in valuation,  it
may result in periods  during which value,  as determined by amortized  cost, is
higher or lower than the price the Fund would receive if it sold the investment.
During  periods of  declining  interest  rates,  the yield on shares of the Fund
computed as described below may tend to be higher than a like  computation  made
by a fund with identical  investments utilizing a method of valuation based upon
market  prices  and  estimates  of  market  prices  for  all  of  its  portfolio
investments.  Thus, if the use of amortized cost by the Fund resulted in a lower
aggregate  portfolio  value on a particular  day, a prospective  investor in the
Fund would be able to obtain a somewhat  higher  yield  than would  result  from
investment in a fund utilizing solely market values. The converse would apply in
a period of rising interest rates.

         Standby  commitments  will be valued at zero in  determining  net asset
value.  "When-issued"  securities will be valued at the value of the security at
the time the commitment to purchase is entered into.

         The  valuation  of the Fund's  portfolio  investments  based upon their
amortized cost and the concomitant  expectation to maintain the Fund's per share
net asset value of $1.00 is  permitted  in  accordance  with Rule 2a-7 under the
1940 Act pursuant to which the Fund must adhere to certain  conditions which are
described in detail in the Prospectus.  The Fund must maintain a dollar-weighted
average  portfolio  maturity of 90 days or less. The maturities of variable rate
demand  instruments held in the Fund's portfolio will be deemed to be the longer
of the  demand  period or the  period  remaining  until the next  interest  rate
adjustment,  although  stated  maturities  may be in  excess  of one  year.  The
Trustees  have  established  procedures  designed  to  stabilize,  to the extent
reasonably  possible,  the  price  per  share  of the Fund  for the  purpose  of
maintaining  sales and redemptions at a single value. It is the intention of the
Fund to  maintain  the  per-share  net asset  value of $1.00 but there can be no
assurance of this. Such  procedures will include review of the Fund's  portfolio
holdings by the Trustees,  at such  intervals as they may deem  appropriate,  to
determine  whether  the Fund's  net asset  value per class  calculated  by using
available  market  quotations  deviates from $1.00 per share and, if so, whether
such  deviation  may  result in  material  dilution  or is  otherwise  unfair to
existing shareholders. In the event the Trustees determine that such a deviation
exists,  they  have  agreed  to take such  corrective  action as they  regard as
necessary  and  appropriate,  including:  (i) the sale of portfolio  instruments
prior to  maturity  to realize  capital  gains or losses or to  shorten  average
portfolio maturity; (ii) withholding dividends;  (iii) redeeming shares in kind;
or (iv)  establishing  a net asset  value per  share by using  available  market
quotations.
    

                                      -12-
<PAGE>

14.      SYSTEMATIC WITHDRAWAL PLAN

   
         The  Systematic  Withdrawal  Plan  ("SWP")  is  designed  to  provide a
convenient  method of receiving fixed payments at regular  intervals from shares
of the Fund deposited by the applicant  under this SWP.  Withdrawals are limited
to 10% of the value of the account at the time the plan is implemented if a CDSC
applies (see the Prospectus).  You must deposit or purchase for deposit with PSC
shares  of the Fund  having a total  value of not less  than  $10,000.  Periodic
payments of $50 or more will be deposited  monthly or quarterly  directly into a
bank account designated by you, or will be sent to you, or any person designated
by you.

         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.  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 capital.

         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 Fund.
    

15.      INVESTMENT RESULTS

   
         From  time to time,  the Fund will  provide  yield  quotations  for its
shares.  These quotations are calculated by standard  methods  prescribed by the
SEC and may from time to time be used in the  Fund's  Prospectus,  Statement  of
Additional   Information,   advertisements,   shareholder   reports   or   other
communications  to shareholders.  However,  these yield quotations should not be
considered as representative of the performance of the Fund in the future since,
unlike  some bank  deposits or other  investments  which pay a fixed yield for a
stated  period of time,  the  yields  of the Fund  will vary  based on the type,
quality and maturities of the securities held in its portfolios, fluctuations in
short-term interest rates and changes in its expenses.

         The Fund's yield  quotations  are computed as follows:  the net change,
exclusive of capital  changes (i.e.,  realized gains and losses from the sale of
securities  and unrealized  appreciation  and  depreciation),  in the value of a
hypothetical  pre-existing  share  account  having a balance of one share at the
beginning  of  the  seven-day   base  period  is  determined  by  subtracting  a
hypothetical charge reflecting expense deductions from the hypothetical account,
and dividing the net change in value by the value of the share at the  beginning
of the base period. This base period return is then multiplied by 365/7 with the
resulting yield figure carried to the nearest 100th of 1%. The  determination of
net change in account value  reflects the value of additional  shares  purchased
with dividends from the original share,  dividends declared on both the original
share and any such additional shares, and all fees that are charged to the Fund,
in  proportion to the length of the base period and the Fund's  average  account
size (with respect to any fees that vary with the size of an account).

         The Fund may also advertise  quotations of effective  yield.  Effective
yield is computed by compounding the unannualized  base period return determined
as in the preceding paragraph by adding 1 to the base period return, raising the
sum to a power equal to 365 divided by 7, and  subtracting  one from the result,
according to the following formula:
    

              Effective Yield = (base period return + 1) 365/7 - 1

   
         The  yield and  effective  yield of the Fund for the  seven-day  period
ended December 31, 1995 are as follows:
    

                                      -13-
<PAGE>

                     Before Expense Limitation        After Expense Limitation
                   Effective                      Effective
Class A Shares       Yield              Yield       Yield            Yield

   
Pioneer U.S.
Government Money
Fund                  4.34%            4.46%       4.96%                5.09%
    


         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:

          .    net asset value prices for all Pioneer mutual funds;

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

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

          .    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,  and  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 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.

16. FINANCIAL STATEMENTS

   
         The Fund's  financial  statements  for the year ended December 31, 1995
are included in the Fund's Annual Report dated  December 31, 1995,  which report
is  incorporated  by  reference  into  and is  attached  to  this  Statement  of
Additional  Information  in  reliance  upon the report of Arthur  Andersen  LLP,
independent public  accountants,  as experts. A copy of the Fund's Annual Report
may  also  be  obtained  without  charge  by  calling  Shareholder  Services  at
1-800-225-6292  or by written  request to the Fund at 60 State  Street,  Boston,
Massachusetts 02109.
    


                                      -14-
<PAGE>

                                   APPENDIX A
                    Description of Commercial Paper Ratings1

                         Moody's Investors Service, Inc.

Commercial Paper

         P-1: P-1 is the highest  commercial  paper rating  assigned by Moody's.
Among the factors  considered by Moody's in assigning ratings are the following:
(i) evaluation of the management of the issuer;  (ii) economic evaluation of the
issuer's industry or industries and an appraisal of speculative-type risks which
may be inherent in certain areas;  (iii) evaluation of the issuer's  products in
relation to competition and customer acceptance;  (iv) liquidity; (v) amount and
quality of long-term  debt;  (vi) trend of earnings  over a period of ten years;
(vii) financial strength of any parent company and the relationships which exist
with  the  issuer;  and  (viii)  recognition  by  management  of the  issuer  of
obligations  which may be  present  or may arise as a result of public  interest
questions and preparations to meet such obligations.

                         Standard & Poor's Ratings Group

Commercial Paper

         A-1:   Commercial   paper  rated  A-1  or  better  has  the   following
characteristics:  (i) the liquidity ratio of its issuer is adequate to meet cash
requirements; (ii) its issuer has outstanding debt rated AA or better; (iii) the
issuer has access to at least two additional sources of borrowing;  and (iv) the
issuer's  basic  earnings and cash flow have an upward trend with allowance made
for unusual circumstances. Typically, the issuer's industry is judged to be well
established and the issuer has a strong position within the industry.





   
1The  ratings  indicated  herein  are  believed  to be the most  recent  ratings
available  at the  date of this  Statement  of  Additional  Information  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 Fund's fiscal year-end.
    




                                      -15-
<PAGE>
                             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 


                                      -16-
<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



                                      -17-
<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.


                                      -18-
<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








                                      -19-
<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


                                      -20-
<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




                                      -21-
<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


                                      -22-
<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
                                                                                
                                                                                


                                      -23-
<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
     


                                      -24-
<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
          
     

                                      -25-
<PAGE>
     
     
   
                                   APPENDIX B
                            Other Pioneer Information

         The  Pioneer  group of mutual  funds was  established  in 1928 with the
creation  of Pioneer  Fund.  Pioneer  is one of the oldest and most  experienced
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.

         Total assets of all Pioneer  mutual  funds at December  31, 1995,  were
approximately $12 billion  representing  982,369 shareholder  accounts - 637,060
non-retirement accounts and 345,309 retirement accounts.












    







                                      -26-

<PAGE>

                           PIONEER MONEY MARKET 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  December 31, 1995
                  (filed  electronically  on February  20, 1996,  accession  no.
                  0000812195-96-000003; file no. 33-13179 and 811-5099.
    


         (b)      Exhibits:

   
                  1.       Agreement and Declaration of Trust (Delaware Business
                           Trust)*

                  1.1      Establishment  and Designation of Classes for Pioneer
                           Cash Reserves Fund+

                  2.       By-laws (Delaware Business Trust)*
    

                  3.       None

   
                  4.       Specimen Stock Certificate*

                  5.       Management Contract between Registrant,  on behalf of
                           each series,  and Pioneering  Management  Corporation
                           and  schedule  of   substantially   similar   omitted
                           documents*

                  6.1      Underwriting Agreement between Registrant,  on behalf
                           of each series, and Pioneer Funds Distributor, Inc.*

                  6.2      Form of Dealer Sales Agreement+
    

                  7.       None

   
                  8.       Custodian  Agreement with Brown  Brothers  Harriman &
                           Co.*

                  9.       Investment Company Service Agreement*

                  10.      Opinion of Morris, Nichols, Arsht and Tunnell+
    

                  11.      Consent of Arthur Andersen LLP+

                                      C-1
<PAGE>

   
                  12.      None

                  13.      Stock Purchase Agreement*

                  14.      None

                  15.1     Amended Class A Rule 12b-1 Distribution Plan*

                  15.2     Class B Rule  12b-1  Distribution  Plan on  behalf of
                           Pioneer Cash Reserves Fund*

                  15.3     Class C Rule  12b-1  Distribution  Plan on  behalf of
                           Pioneer Cash Reserves Fund+

                  16.      Description  of Average Annual Total Return and Yield
                           Calculation*

                  17.      Financial Data Schedules+

                  18.1     Multiple  Class  Plan  Pursuant  to  Rule  18f-3  for
                           Pioneer Cash Reserves Fund for Classes A and B+

                  18.2     Multiple  Class  Plan  Pursuant  to  Rule  18f-3  for
                           Pioneer Cash Reserves Fund for Classes A, B and C+  

                  19.      Powers of Attorney*

- ------------------------
+    Filed electronically herewith.

*    Incorporated by reference from the  Registrant's  Post-Effective  Amendment
     No.  12 to the  Registration  Statement  as filed  electronically  with the
     Securities  and Exchange  Commission  on March 28, 1996  (accession  number
     00000812195-95-000011).


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
    


                                      C-2
<PAGE>

   
Pioneer Goldfields Ltd (PGL)             PGI        100%       MA
Pioneer Investments Corp. (PIC)          PGI        100%       MA
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   DE
Pioneer II     DE
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:

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

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

 .    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 14% 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
record  holders of each class of securities of the Registrant as of December 31,
1995:
    

                                      C-4
<PAGE>

                                               Number of
Title of Class                               Record Holders

   
                                      Class A      Class B        Class C

Shares of Pioneer
  Cash Reserves Fund

Shares of Pioneer
  U.S. Government Money Fund                         N/A            N/A

    

Item 27. Indemnification

         Except pursuant to the Agreement and Declaration of Trust, establishing
the Registrant as a Trust under Delaware 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 Agreement and  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
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 Pioneering Management  Corporation.  The following
sections of such Forms ADV are incorporated herein by reference:

                  (a)      Items 1 and 2 of Part 2;

                  (b)      Section 6, 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

                                      C-5
<PAGE>

David D. Tripple          Director                        Executive Vice
                                                          President and Trustee

Steven M. Graziano        Senior Vice President           None

Stephen W. Long           Senior Vice President           None

   
John W. Drachman          Vice President                  None
    

Barry G. Knight           Vice President                  None

William A. Misata         Vice President                  None

Anne W. Patenaude         Vice President                  None

   
Gail A. Smyth             Vice President                  None

Constance D. Spiros       Vice President                  None

Marcy L. Supovitz         Vice President                  None

Mary Kleeman              Vice President                  None
    

Steven R. Berke           Assistant Vice                  None
                          President

Mary Sue Hoban            Assistant Vice                  None
                          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 02109; contact the Treasurer.


                                      C-6
<PAGE>

Item 31. Management Services

         The Registrant is a party to one contract,  described in the Prospectus
and the Statement of Additional Information,  under which it receives management
and advisory services from Pioneering Management Corporation.


Item 32.  Undertakings

         The  Registrant  hereby  undertakes  to furnish  each  person to whom a
prospectus is delivered with a copy of the Registrant's  latest Annual Report to
shareholders upon request and without charge.





                                      C-7
<PAGE>


                                   SIGNATURES


   
Pursuant to the  requirements  of the  Securities Act of 1933 and the Investment
Company Act of 1940, the Registrant certifies that it meets all the requirements
for effectiveness of this  Post-Effective  Amendment No. 13 (the "Amendment") to
the Registration  Statement  pursuant to Rule 485(b) under the Securities Act of
1933 and has duly  caused  this  Amendment  to be  signed  on its  behalf by the
undersigned,  thereunto duly authorized,  in the City of Boston and Commonwealth
of Massachusetts, on the 26th day of April, 1996.
    



                                            PIONEER MONEY MARKET TRUST



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


         Pursuant  to the  requirements  of the  Securities  Act of  1933,  this
Amendment  No.  11 has  been  signed  below  by  the  following  persons  in the
capacities and on the dates indicated:

         Signature                                         Date

Principal Executive Officer:                 )
                                             )
John F. Cogan, Jr.*                          )
John F. Cogan, Jr.                           )
                                             )
                                             )
Principal Financial and                      )
Accounting Officer:                          )
                                             )
William H. Keough*                           )
William H. Keough                            )   



A MAJORITY OF THE BOARD OF TRUSTEES:

                                    )
John F. Cogan, Jr.*                 )
John F. Cogan, Jr.                  )
                                    )

<PAGE>

Richard H. Egdahl, M.D.*            )
Richard H. Egdahl, M.D.             )
                                    )
John W. Kendrick*                   )
John W. Kendrick                    )
                                    )
Marguerite A. Piret*                )
Marguerite A. Piret                 )
                                    )
David D. Tripple*                   )
David D. Tripple                    )
                                    )
Stephen K. West*                    )
Stephen K. West                     )
                                    )
John Winthrop*                      )
John Winthrop                       )
                                    )
Margaret B.W. Graham*               )
Margaret B.W. Graham                )


   
*By      /s/Joseph P. Barri                       April 26, 1996
         Joseph P. Barri
         Attorney-in-Fact
    


<PAGE>




                                  Exhibit Index

Exhibit
Number              Document Title


   
1.1  Establishment and Designation of Classes for Pioneer Cash Reserves Fund

6.2  Form of Dealer Sales Agreement

10.  Opinion of Morris, Nichols, Arsht and Tunnell
    

11.  Consent of Arthur Andersen LLP

   
15.3 Class C Rule 12b-1  Distribution  Plan on behalf of Pioneer  Cash  Reserves
     Fund

17.  Financial Data Schedules

18.1 Multiple  Class Plan  Pursuant to Rule 18f-3 for Pioneer Cash Reserves Fund
     for Classes A and B

18.2 Multiple  Class Plan  Pursuant to Rule 18f-3 for Pioneer Cash Reserves Fund
     for Classes A, B and C
    



                           PIONEER MONEY MARKET TRUST


                          Establishment and Designation
                                       of
                Class A Shares, Class B Shares and Class C Shares
                            of Beneficial Interest of
                           Pioneer Cash Reserves Fund



     The  undersigned,  being a majority of the Trustees of Pioneer Money Market
Trust, a Delaware  business trust (the "Trust"),  acting  pursuant to Article V,
Section 1 of the Agreement and Declaration of Trust dated February,  1995 of the
Trust (the "Declaration"), do hereby divide the shares of beneficial interest of
Pioneer Cash Reserves Fund (the "Fund") (the  "Shares"),  a series of the Trust,
to create three classes of Shares of the Fund as follows:

     1.   The three  classes of Shares  established  and  designated  hereby are
          "Class A Shares," "Class B Shares" and "Class C Shares," respectively.

     2.   Class A  Shares,  Class B  Shares  and  Class C Shares  shall  each be
          entitled to all of the rights and preferences accorded to Shares under
          the Declaration.

     3.   The  purchase  price of Class A  Shares,  Class B Shares  and  Class C
          Shares,  the  method of  determining  the net  asset  value of Class A
          Shares,  Class B Shares and Class C Shares and the  relative  dividend
          rights of holders of Class A Shares, Class B Shares and Class C Shares
          shall be established  by the Trustees of the Trust in accordance  with
          the  provisions  of the  Declaration  and  shall  be set  forth in the
          Trust's  Registration  Statement on Form N-1A under the Securities Act
          of 1933 and/or the  Investment  Company Act of 1940, as amended and as
          in effect at the time of issuing such Shares.

     4.   The Trustees, acting in their sole discretion,  may determine that any
          Shares of the Fund issued are Class A Shares,  Class B Shares, Class C
          Shares  or  Shares  of  any  other  class  of  the  Fund   hereinafter
          established and designated by the Trustees.

<PAGE>

     IN WITNESS WHEREOF,  the undersigned have executed this instrument this 4th
day of October, 1995.




/s/John F. Cogan, Jr.                   /s/Marguerite A. Piret
John F. Cogan, Jr.                      Marguerite A. Piret
as Trustee and not individually         as Trustee and not individually
975 Memorial Drive, #802                162 Washington Street
Cambridge, MA  02138                    Belmont, MA  02178



/s/Richard H. Egdahl, M.D.              /s/David D. Tripple
Richard H. Egdahl, M.D.                 David D. Tripple
as Trustee and not individually         as Trustee and not individually
Health Policy Institute                 6 Woodbine Road
53 Bay State Road                       Belmont, MA  02178
Boston, MA  02215


/s/Margaret B.W. Graham                 /s/Stephen K. West, Esq.
Margaret B.W. Graham                    Stephen K. West, Esq.
as Trustee and not individually         as Trustee and not individually
The Keep                                Sullivan & Cromwell
P.O. Box 110                            125 Broad Street
Little Deer Isle, ME 04650              New York, NY  10004


/s/John W. Kendrick                     /s/John Winthrop
John W. Kendrick                        John Winthrop
as Trustee and not individually         as Trustee and not individually
6363 Waterway Drive                     One North Adgers Wharf
Falls Church, VA 22044                  Charleston, SC  29401




                         PIONEER FUNDS DISTRIBUTOR, INC.
                                 60 State Street
                                Boston, MA 02109
                                 (617) 742-7825

                                 SALES AGREEMENT

Gentlemen:

      Pioneer Funds Distributor,  Inc. (PFD), acts as principal underwriter,  as
defined in the Investment  Company Act of 1940,  for the  registered  investment
companies  (the "Funds")  listed on Appendix A attached (as amended from time to
time by PFD.)  Acting as a  principal,  PFD  offers to sell  shares of the Funds
subject to the conditions set forth in this agreement and subsequent  amendments
thereto.

      1. Shares  purchased  from PFD for sale to the public shall be offered and
sold at the price or prices,  and on the terms and conditions,  set forth in the
currently  effective  prospectus of the Funds, as amended or  supplemented  from
time to time (the "Prospectus" or "Prospectuses"). In the sale of such shares to
the  public  you shall act as dealer  for your own  account or as agent for your
customer  and in no  transaction  shall  you have any  authority  to act or hold
yourself  out as agent for PFD,  any of the Funds,  the Funds'  Custodians,  the
Funds' Transfer  agent, or any other party,  and nothing in this agreement shall
constitute you a partner, employee or agent of ours or give you any authority to
act for PFD.  Neither  PFD nor the funds shall be liable for any of your acts or
obligations as a  broker-dealer  under this  agreement.  Nothing herein shall be
construed to prohibit your acting as agent for one or both customers in the sale
of shares by one customer to another and charging such  customer(s) a reasonable
commission.

       2. Shares  purchased  from PFD for sale to the public  shall be purchased
only to cover  orders  previously  received by you from your  customers.  Shares
purchased  for your own bona  fide  investment  shall not be  reoffered  or sold
except to the applicable Fund or to PFD. PFD also agrees to purchase shares only
for investment or to cover orders received.

       3. If you  purchase  shares  from your  customers,  you agree to pay such
customers not less than the redemption  price in effect on the date of purchase,
as defined in the prospectus of the applicable  Fund.  Sales of shares at prices
reflecting a discount, concession, commission or other reallowance shall be made
only to registered  broker-dealers which are members of the National Association
of  Securities  Dealers  Inc.  (NASD)  and who  also  have  entered  into  sales
agreements with PFD.

       4. Only unconditional  orders for a designated number of shares or dollar
amount of investment shall be accepted.  Procedures  relating to handling orders
shall be conveyed to you from time to time. All orders are subject to acceptance
or rejection by PFD in our sole discretion.

       5. If any shares sold to or through you under the terms of this agreement
are  repurchased by PFD or by the issuer or are tendered for  redemption  within
seven business days after the date of our confirmation of the original  purchase
by you, we both agree to pay to the Fund all commissions on such shares.

       6.  Sales by you to the  public  shall earn a  commission  computed  as a
percentage of the  applicable  offering price and which varies with the size and
nature of each such purchase.  The terms and conditions affecting the applicable
offering  prices  on shares  sold  with a  front-end  sales  charge ,  including
features such as combined purchase, rights of accumulation, Letters of Intention
and net asset value purchases, are described in the prospectuses.  The schedules
of commissions generally payable with respect to sales of the Funds are outlined
on Appendix A to this agreement.  Commission checks for less than $1 will not be
issued.

      PFD may, from time to time,  offer  additional  commissions  or bonuses on
sales by you or your representatives  without otherwise revising this agreement.
Any such additional  commissions or bonuses shall take effect in accordance with
the terms and conditions contained in written notification to you.

       7.  Remittance of the net amount due for shares  purchased from PFD shall
be  made  payable  to  Pioneering  Services  Corporation  (PSC)  Agent  for  the
Underwriter,  in New York or Boston funds, within three days of our confirmation
of sale to you, or within such  shorter  time as  specified  by the rules of the
NASD or of a registered clearing agent through which the transaction is settled.
Payments  made to PSC should be sent to Post Office Box 9014,  Boston,  MA 02205
(or  wired  to  an  account   designated  by  PSC),  along  with  your  transfer
instructions on the appropriate copy of our confirmation of sale to you. If such
payment is not  received by PSC, we reserve  the right to  liquidate  the shares
purchased for your account and risk.  Promptly  upon receipt of payment,  shares
sold to you shall be  deposited by PSC to an account on the books of the Fund(s)
in accordance  with your  instructions.  Certificates  will not be issued unless
specifically requested and we reserve the right to levy a charge for issuance of
certificates.

       8. You represent  that you are and, at the time of purchasing  any shares
of the Funds, will be registered as a broker-dealer  with the US. Securities and
Exchange  Commission (SEC) or are exempt from such registration;  if required to
be registered as a broker-dealer  you are a member in good standing of the NASD;
you are qualified to act as a broker-dealer  in the states or  jurisdictions  in
which you intend to offer shares of the Funds;  you will abide by all applicable
federal and state  statutes and the rules of the NASD;  and when making sales to
citizens  or  residents  of  foreign  countries,  that  you  will  abide  by all
applicable  laws and  regulations of that country.  Expulsion or suspension from
the  NASD or  revocation  or  suspension  of SEC  registration  shall  act as an
immediate cancellation of this agreement.

       9. No person is authorized to make any representations  concerning shares
of any of the Funds except those  contained  in the then current  Prospectus  or
Statement of Additional Information for such Fund. In purchasing shares from PFD
you shall rely solely on the representations  contained in such Prospectuses and
Statements of Additional Information.

      10.  Additional  copies  of  the  current   prospectuses,   Statements  of
Additional   Information  (SAI),  and  other  literature  will  be  supplied  in
reasonable quantities upon request.


<PAGE>


      11. We reserve the right in our  discretion  to suspend  sales or withdraw
the offering of shares of any Fund  entirely.  Either party hereto has the right
to cancel this agreement  upon five days' written notice to the other party.  We
reserve  the right to amend  this  agreement  at any time and you agree  that an
order to purchase  shares of any one of the Funds  placed by you after notice of
such amendment has been sent to you shall  constitute your agreement to any such
amendment.

      12. All written communications to PFD should be sent to the above address.
All written communications to you will be sent to your address listed below.

      13. This  agreement  shall  become  effective  upon  receipt by us of your
acceptance  hereof and supersedes any prior agreement between us with respect to
the sales of Shares of any of the Funds.

      14. This  agreement  shall be  construed  in  accordance  with the laws of
Massachusetts. The parties hereby agree that all disputes between us of whatever
subject matter, whether existing on the date hereof or arising hereafter,  shall
be  submitted  to  arbitration  in  accordance  with  the then  current  Code of
Arbitration Procedure of the NASD, the Uniform Arbitration Act or similar rules.
Arbitration shall take place in the city of Boston, Massachusetts.  Any decision
that shall be made in such arbitration shall be final and binding and shall have
the  same  force  and  effect  as a  judgment  made  in  a  court  of  competent
jurisdiction.

      15. You appoint the transfer  agent for each Fund as your agent to execute
the purchase  transactions  of Shares of such Fund in accordance  with the terms
and provisions of any account,  program,  plan or service established or used by
your  customers and to confirm each  purchase to your  customers on your behalf,
except as modified in writing by the transfer agent, and you guarantee to us and
the Fund the legal capacity of your customers so purchasing  such Shares and any
other person in whose name the Shares are to be registered.

                                          PIONEER FUNDS DISTRIBUTOR, INC.
Date:           ,

                                          By:__________________________________
                                             William A. Misata
                                             Vice President


The undersigned hereby accepts the offer set forth in above letter.

By:__________________________________________________


Title:________________________________________________



                      RETAIN ONE COPY AND RETURN THE OTHER

<PAGE>
                                   APPENDIX A

                                     CLASS A

                                   Schedule 1

<TABLE>
<CAPTION>
<S>                                    <C>                                 <C>
Pioneer Fund                           Pioneer Mid-Cap Fund*               Pioneer Equity-Income Fund
Pioneer II                             Pioneer Gold Shares                 Pioneer Growth Shares
Pioneer International Growth Fund      Pioneer Europe Fund                 Pioneer Real Estate Shares
Pioneer Capital Growth Fund            Pioneer Emerging Markets Fund       Pioneer Small Company Fund
Pioneer India Fund

                                       Sales Charge
                                       as % of Public                      Broker/Dealer
Purchase Amount                        Offering Price                      Commission
Less than  $ 50,000..........              5.75                                 5.00%
 $ 50,000 -  99,999..........              4.50                                 4.00
  100,000 - 249,999..........              3.50                                 3.00
  250,000 - 499,999..........              2.50                                 2.00
  500,000 - 999,999..........              2.00                                 1.75
1,000,000  or more ..........              none                            a) see below


                                   Schedule 2

Pioneer Bond Fund                      Pioneer America Income Trust            Pioneer Tax-Free Income Fund
Pioneer Income Fund

                                       Sales Charge
                                       as % of Public                      Broker/Dealer
Purchase Amount                        Offering Price                      Commission
Less than  $100,000..........              4.50                                 4.00%
 $100,000 - 249,999..........              3.50                                 3.00
  250,000 -  499,000.........              2.50                                 2.00
  500,000 -  999,999.........              2.00                                 1.75
1,000,000  or more ..........              none                            a) see below


                                   Schedule 3

Pioneer Intermediate Tax-Free Fund

                                       Sales Charge
                                       as % of Public                      Broker/Dealer
Purchase Amount                        Offering Price                      Commission
Less than  $ 50,000..........              3.50                                 3.00%
 $ 50,000 -   99,999.........              3.00                                 2.50
  100,000 - 499,999..........              2.50                                 2.00
  500,000 - 999,999..........              2.00                                 1.75
1,000,000  or more ..........              none                            a) see below

                                   Schedule 4

Pioneer Short-Term Income Trust
                                       Sales Charge
                                       as % of Public                      Broker/Dealer
Purchase Amount                        Offering Price                      Commission
Less than  $ 50,000..........              2.50                                 2.00%
 $ 50,000 -   99,999.........              2.00                                 1.75
  100,000 - 249,999..........              1.50                                 1.25
  250,000 - 999,999..........              1.00                                 1.00
1,000,000  or more ..........              none                            a) see below

</TABLE>

a) Purchases of $1 million or more, and certain group plans,  are not subject to
an initial sales charge. PFD may pay a commission to broker-dealers who initiate
and are  responsible  for such purchases at the following rate: for funds listed
on schedules 1 and 2 above,  the rate is as follows:  1% on the first $5 million
invested,  .50 of 1% on the next $45 million and .25 of 1% on the excess over 50
million.  For funds  listed on  schedules 3 and 4 : .50 of 1% on purchases of $1
million to $5 million and .10 of 1% on the excess  over $5  million.  A one-year
prepaid service fee is included in this commission.  These commissions shall not
be payable 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.  A contingent  deferred  sales charge will be payable on these
investments  in the event of share  redemption  within 12 months  following  the
share purchase,  at the rate of 1% on funds in schedules 1 and 2 ; and .50 of 1%
on funds in schedules 3 and 4, 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.  For  additional  information  about  the  broker-dealer
commission   and   contingent   deferred   sales  charge   applicable  to  these
transactions, refer to the Fund's prospectus.



                             PLEASE RETAIN THIS COPY


<PAGE>




                                   Schedule 5

Pioneer Cash Reserves Fund                   Pioneer U.S. Government Money Fund

                                       No Load





                                     CLASS B

    Schedule 1                     Schedule 2                         Schedule 3
    ----------                     ----------                         ----------
<TABLE>
<CAPTION>
<S>                                <C>                                <C>
Pioneer Equity Income Fund         Pioneer Intermediate Tax-Free      Pioneer Short-Term 
Pioneer Bond Fund                       Fund                              Income Trust
Pioneer Capital Growth Fund
Pioneer Europe Fund
Pioneer Gold Share
Pioneer America Income Trust
Pioneer Emerging Markets Fund
Pioneer India Fund
Pioneer Cash Reserves Fund
Pioneer Growth Shares
Pioneer Income Fund
Pioneer Tax-Free Income Fund
Pioneer Small Company Fund
Pioneer International Growth Fund
Pioneer Real Estate Shares
Pioneer Mid-Cap Fund*
</TABLE>

Broker/Dealer
Commission               4.00%           3.00%           2.00%
- ----------

Year Since
Purchase                 CDSC%           CDSC%           CDSC%

First                     4.0             3.0             2.0
Second                    4.0             3.0             2.0
Third                     3.0             2.0             1.0
Fourth                    3.0             1.0             none
Fifth                     2.0            none             none
Sixth                     1.0            none         To A Class
Seventh                  none         To A Class
Eigth                    none
Ninth                 To A Class


a)Dealer  Commission  includes  a first year  service  fee equal to 0.25% of the
amount invested in all Class B shares.

                                     CLASS C

<TABLE>
<CAPTION>
<S>                                    <C>                               <C>
Pioneer America Income Trust           Pioneer Bond Fund                 Pioneer Capital Growth Fund
Pioneer Cash Reserves Funds            Pioneer Emerging Markets Fund     Pioneer Equity-Income Fund
Pioneer Europe Fund                    Pioneer Gold Shares               Pioneer Growth Shares
Pioneer Income Fund                    Pioneer Real Estate Shares        Pioneer India Fund
Pioneer Intermediate Tax-Free Fund     Pioneer Small Company Fund        Pioneer Tax-Free Income Fund
Pioneer International Growth Fund      Pioneer Mid-Cap Fund*
</TABLE>

a) 1% Payout to Broker
b) 1% CDSC for One Year

*formerly Pioneer Three Fund

<PAGE>
                         PIONEER FUNDS DISTRIBUTOR, INC.
                                 60 State Street
                                Boston, MA 02109
                                 (617) 742-7825


                    SUPPLEMENTAL SALES AND SERVICE AGREEMENT



You have entered into a Sales  Agreement  with Pioneer Funds  Distributor,  Inc.
("PFD")  with  respect  to the  Pioneer  mutual  funds for  which PFD  serves as
principal underwriter ("the Funds").

This agreement incorporates and supplements that agreement.  In consideration of
your sales of shares of the Funds, for providing services to shareholders of the
Funds and of the Pioneer money market funds and assisting PFD and its affiliates
in providing such services, we are authorized to pay you certain service fees as
specified  herein.  Receipt  by you of any such  service  fees is subject to the
terms and  conditions  contained  in the Funds'  prospectuses  and/or  specified
below, as may be amended from time to time.

1. You agree to cooperate  as requested  with  programs  that the Funds,  PFD or
their affiliates provide to enhance shareholder service.

2. You agree to take an active role in providing  such  shareholder  services as
processing purchase and redemption transactions and, where applicable, exchanges
and  account  transfers;  establishing  and  maintaining  shareholder  accounts;
providing  certain  information  and  assistance  with  respect  to  the  Funds;
responding  to  shareholder  inquiries  or advising us of such  inquiries  where
appropriate.

3., You agree to assign an active registered  representative to each shareholder
account  on your  and our  records  and to  reassign  accounts  when  registered
representatives  leave your firm. You also agree, with respect to accounts which
are held in  nominee  or  "street"  name,  to  provide  such  documentation  and
verification  that active  representatives  are assigned to all such accounts as
PFD may require from time to time.

4. You agree to pay to the  registered  representatives  assigned to shareholder
accounts a share of any service fees paid to you pursuant to this agreement. You
also agree to instruct your  representatives  to regularly contact  shareholders
whose accounts are assigned to them.

5. You acknowledge that service fee payments are subject to terms and conditions
set forth  herein  and in the  Funds'  prospectuses,  Statements  of  Additional
Information and Plans of Distribution  and that this agreement may be terminated
by  either  party at any time by  written  notice  to the  other.  Any  order to
purchase or sell shares  received by PFD from you  subsequent to the date of our
notification  to you of an amendment of the Agreement shall be deemed to be your
acceptance of such an amendment.

6. You  acknowledge  that your  continued  participation  in this  agreement  is
subject to your providing a level of support to PFD's  marketing and shareholder
retention  efforts  that is  deemed  acceptable  by PFD.  Factors  which  may be
considered by PFD in this respect include,  but are not limited to, the level of
shareholder  redemptions,  the level of assistance in disseminating  shareholder
communications,  reasonable access to your offices and/or representatives by PFD
wholesalers  or  other  employees  and  whether  your  compensation   system  or
"preferential  list"  unduly  discriminates  against  the sale of  shares of the
Funds.

7. Service fees will  generally  be paid  quarterly,  at the rates and under the
conditions specified on schedule A hereto.

8. All communications to PFD should be sent to the above address.  Any notice to
you shall be duly given if mailed or telegraphed to the address specified by you
below.  This agreement,  in conjunction with the Sales Agreement,  describes the
complete understanding of the parties.
This  agreement  shall  be  construed  under  the  laws of the  Commonwealth  of
Massachusetts.

Accepted:                        Execute this Agreement in duplicate 
                                 and return one ofthe duplicate originals to us.
By:___________________________
                                 By:_________________________________________
Title:________________________      William A. Misata
                                    Vice President






                      RETAIN ONE COPY AND RETURN THE OTHER


<PAGE>



                    SUPPLEMENTAL SALES AND SERVICE AGREEMENT
                      WITH PIONEER FUNDS DISTRIBUTOR, INC.

                                   SCHEDULE A

     1. Except as  specified in Section 4 below,  service fees on the  aggregate
net asset value of each account assigned to you in Pioneer Fund, Pioneer II, and
Pioneer Mid-Cap Fund** will be paid at the rate of:

      a.    0.15% annually on shares acquired prior to August 19, 1991.

      b.    0.25% annually on shares acquired on or after August 19, 1991.


     2. Except as  specified in Section 4 below,  service fees on the  aggregate
net asset value of each account assigned to you in:

Pioneer America Income Trust            Pioneer International  Growth  Fund
Pioneer  Bond  Fund                     Pioneer  Growth  Shares   
Pioneer Intermediate Tax-Free Fund      Pioneer Real Estate Shares 
Pioneer Europe Fund                     Pioneer Income Fund 
Pioneer Capital Growth Fund             Pioneer Tax-Free Income Fund 
Pioneer Equity-Income  Fund             Pioneer  Short-Term  Income Trust  
Pioneer Gold Shares                     Pioneer  India Fund
Pioneer Emerging  Markets  Fund         Pioneer  Small Company Fund*

                                will be paid at the rate of:

      a. 0.15%  annually if the shares are acquired on or after August 19, 1991,
as a result of an exchange  from Pioneer  Fund,  Pioneer II, or Pioneer  Mid-Cap
Fund** of shares owned prior to August 19, 1991.

      b.   0.25% annually on all other shares.


     3. Except as specified in Section 4 below,  service fees will be paid at an
annual rate of 0.15% of the aggregate  net asset value of each account  assigned
to you in:

                       Pioneer Cash Reserves Fund
                       Pioneer US. Government Money Fund
                       Pioneer California Double Tax-Free Fund
                       Pioneer Massachusetts Double Tax-Free Fund
                       Pioneer New York Triple Tax-Free Fund



     4. Exceptions -- Service fees will not be paid on accounts representing:

          a.   Purchases   by   you   or   your    affiliates,    employees   or
               representatives.

          b    Shares which were purchased at net asset value,  except for sales
               of the  money  market  funds or  sales  on  which  you are paid a
               commission and which are subject to the contingent deferred sales
               charge described in the funds' prospectuses.

          c.   "House"  accounts or any other accounts not assigned to an active
               registered representative(s).

          d.   Accounts  established  in  Pioneer  Bond Fund prior to January 1,
               1986.

          e.   Service  fees of less than $50 per  calendar  quarter will not be
               paid.

          f.   Pioneer  reserves  the right to reduce  the  service  fee paid on
               individual accounts of more than $10 million.

          g.   First year services  fees on shares  subject to a CDSC are at the
               rate of  0.25%  and are  prepaid  as  part of the  initial  sales
               commission.

      5.  Service  fees on shares sold with a front-end  sales  charge  normally
begin  to be  earned  as  soon  as the  transaction  settles,  unless  specified
otherwise in the fund  prospectus.  Since the  commission  on shares sold with a
CDSC  includes a prepaid one year  service fee , periodic  service  fees on such
shares are paid beginning one year following the transaction.

     6. Service Fees of 1% on class C shares will begin after first year.


*  Service fees begin accruing January 1, 1996
** Formerly Pioneer Three Fund


                        MORRIS, NICHOLS, ARSHT & TUNNELL
                            1201 NORTH MARKET STREET
                                 P.O. BOX 1347
                           WILMINGTON, DE 19899-1347


                                         April 25, 1996



Pioneer Money Market Trust
60 State Street
Boston, Massachusetts  02109

                  Re:      Pioneer Money Market Trust

Ladies and Gentlemen:

                  We have acted as  special  Delaware  counsel to Pioneer  Money
Market Trust,  a Delaware  business  trust (the  "Trust"),  in  connection  with
certain  matters  relating  to the  formation  of the Trust and the  issuance of
Shares of beneficial  interest in the Trust.  Capitalized  terms used herein and
not  otherwise  herein  defined  are  used  as  defined  in  the  Agreement  and
Declaration  of  Trust  of  the  Trust  dated  March  7,  1995  (the  "Governing
Instrument").

                  We  understand  that  you are  about  to  register  under  the
Securities Act of 1933, as amended, 10,642,043 Shares of beneficial in the Trust
by Post-Effective Amendment No. 13 to the Trust's Registration Statement on Form
N-1A (the "Post-Effective Amendment").

                  In rendering  this  opinion,  we have  examined  copies of the
following  documents,  each in the form provided to us: the Certificate of Trust
of the Trust as filed in the  Office of the  Secretary  of State of the State of
Delaware  (the  "Recording  Office") on March 7, 1995 (the  "Certificate");  the
Governing  Instrument;  the  By-laws of the Trust;  certain  resolutions  of the
Trustees  of  the  Trust;  an  Adoption  Of And  Amendment  To  Notification  Of
Registration by which the Trust adopted the  Notification of Registration  Filed
Pursuant to Section 8(a) of the  Investment  Company Act of 1940 on Form N-8A of
Pioneer Money Market  Trust,  a  Massachusetts  business  trust;  Post-Effective
Amendment  No. 12 to the  Registration  Statement on Form N-1A of Pioneer  Money
Market Trust, a  Massachusetts  business  trust, by which the Trust adopted such
Registration  Statement;  the Post-Effective  Amendment;  and a certification of
good  standing  of the Trust  obtained  as of a recent  

<PAGE>
Pioneer Money Market Trust
April 25, 1996
Page 2


date from the  Recording  Office.  In such  examinations,  we have  assumed  the
genuineness  of all  signatures,  the  conformity  to original  documents of all
documents  submitted to us as copies or drafts of documents to be executed,  and
the legal capacity of natural persons to complete the execution of documents. We
have further assumed for the purpose of this opinion: (i) the due authorization,
execution  and delivery by, or on behalf of, each of the parties  thereto of the
above-referenced  instruments,  certificates  and  other  documents,  and of all
documents  contemplated by the Governing Instrument,  the By-laws and applicable
resolutions  of the  Trustees  to be executed  by  investors  desiring to become
Shareholders;  (ii) the payment of consideration for Shares, and the application
of such consideration,  as provided in the Governing Instrument,  and compliance
with the other terms,  conditions  and  restrictions  set forth in the Governing
Instrument  and all  applicable  resolutions  of the  Trustees  of the  Trust in
connection  with the  issuance of Shares  (including,  without  limitation,  the
taking of all appropriate  action by the Trustees to designate  Series of Shares
and the rights and  preferences  attributable  thereto  as  contemplated  by the
Governing  Instrument);  (iii)  that  appropriate  notation  of  the  names  and
addresses  of, the  number of Shares  held by,  and the  consideration  paid by,
Shareholders will be maintained in the appropriate registers and other books and
records of the Trust in connection with the issuance,  redemption or transfer of
Shares;  (iv)  that no  event  has  occurred  subsequent  to the  filing  of the
Certificate that would cause a termination or  reorganization of the Trust under
Section 4 or Section 5 of Article IX of the Governing  Instrument;  (v) that the
activities of the Trust have been and will be conducted in  accordance  with the
terms of the Governing  Instrument and the Delaware  Business Trust Act, 12 Del.
C. ss.ss. 3801 et seq. (the "Delaware Act"); and (vi) that each of the documents
examined  by  us is in  full  force  and  effect  and  has  not  been  modified,
supplemented or otherwise  amended.  No opinion is expressed herein with respect
to the requirements of, or compliance with,  federal or state securities or blue
sky laws.  Further,  we express no opinion on the sufficiency or accuracy of any
registration or offering  documentation  relating to the Trust or the Shares. As
to any facts material to our opinion,  other than those assumed,  we have relied
without independent  investigation on the above-referenced  documents and on the
accuracy, as of the date hereof, of the matters therein contained.

                  Based on and  subject  to the  foregoing,  and  limited in all
respects to matters of Delaware law, it is our opinion that:

                  1. The Trust is a duly organized and validly existing business
trust in good standing under the laws of the State of Delaware.

<PAGE>
Pioneer Money Market Trust
April 25, 1996
Page 3


                  2. The Shares covered by the  Post-Effective  Amendment,  when
issued to Shareholders in accordance  with the terms,  conditions,  requirements
and procedures set forth in the Governing  Instrument,  will constitute  legally
issued,  fully paid and  non-assessable  Shares of  beneficial  interest  in the
Trust.

                  3.  Under  the  Delaware  Act and the  terms of the  Governing
Instrument, each Shareholder of the Trust, in such capacity, will be entitled to
the same  limitation of personal  liability as that extended to  stockholders of
private  corporations for profit organized under the general  corporation law of
the State of  Delaware;  provided,  however,  that we express  no  opinion  with
respect to the  liability of any  Shareholder  who is, was or may become a named
Trustee of the Trust.  Neither the  existence  nor exercise of the voting rights
granted to Shareholders under the Governing  Instrument will, of itself, cause a
Shareholder  to be  deemed a  trustee  of the  Trust  under  the  Delaware  Act.
Notwithstanding  the foregoing or the opinion expressed in paragraph 2 above, we
note that,  pursuant to Section 2 of Article VIII of the  Governing  Instrument,
the  Trustees  have the  power  to  cause  Shareholders,  or  Shareholders  of a
particular  Series,  to pay certain  custodian,  transfer,  servicing or similar
agent charges by setting off the same against  declared but unpaid  dividends or
by reducing Share ownership (or by both means).

                  We hereby consent to the filing of a copy of this opinion with
the Securities and Exchange Commission as part of the Post-Effective  Amendment.
In giving this consent, we do not thereby admit that we come within the category
of persons whose consent is required  under Section 7 of the  Securities  Act of
1933, as amended,  or the rules and  regulations  of the Securities and Exchange
Commission  thereunder.  Except as provided in this  paragraph,  the opinion set
forth above is expressed  solely for the benefit of the addressee hereof and may
not be relied upon by, or filed with, any other person or entity for any purpose
without our prior written consent.

                                         Sincerely,

                                         /s/MORRIS, NICHOLS, ARSHT & TUNNELL
                                         MORRIS, NICHOLS, ARSHT & TUNNELL


                    CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS



As independent  public  accountants,  we hereby consent to the use of our report
dated  February 2, 1996  included in Pioneer  Money  Market  Trust's 1995 Annual
Report  (and to all  references  to our firm)  included in or made a part of the
Pioneer  Money  Market Trust  Post-Effective  Amendment  No. 13 to  Registration
Statement  File No.  33-13179  and  Amendment  No. 14 to  Registration  File No.
811-5099.




                                                 /s/ARTHUR ANDERSEN LLP
                                                 ARTHUR ANDERSEN LLP




Boston, Massachusetts
April 26, 1996




                        CLASS C SHARES DISTRIBUTION PLAN
                     PIONEER MONEY MARKET TRUST ON BEHALF OF
                           PIONEER CASH RESERVES FUND


     CLASS C SHARES  DISTRIBUTION PLAN, dated as of January 31, 1996, of PIONEER
CASH  RESERVES FUND (the  "Fund"),  a series of PIONEER  MONEY MARKET  TRUST,  a
Massachusetts business trust (the "Trust").

                                   WITNESSETH

     WHEREAS,  the Trust is engaged in  business  as an  open-end,  diversified,
management investment company and is registered under the Investment Company Act
of 1940, as amended  (collectively  with the rules and  regulations  promulgated
thereunder, the "1940 Act");

     WHEREAS,  the Trust, on behalf of the Fund, intends to distribute shares of
beneficial  interest (the "Class C Shares") of the Fund in accordance  with Rule
12b-1  promulgated by the Securities and Exchange  Commission under the 1940 Act
("Rule 12b-1"),  and desires to adopt this Class C Shares distribution plan (the
"Class C Plan") as a plan of distribution pursuant to such Rule;

     WHEREAS,  the Trust,  on behalf of the Fund,  desires  that  Pioneer  Funds
Distributor,   Inc.,  a  Massachusetts   corporation  ("PFD"),  provide  certain
distribution services for the Fund's Class C Shares in connection with the Class
C Plan;

     WHEREAS, the Trust, on behalf of the Fund, has entered into an underwriting
agreement  (in a form  approved  by the  Trust's  Board of  Trustees in a manner
specified  in such Rule 12b-1) with PFD,  whereby PFD  provides  facilities  and
personnel and renders  services to the Trust in connection with the offering and
distribution of Class C Shares (the "Underwriting Agreement");

     WHEREAS,  the Trust, on behalf of the Fund, also recognizes and agrees that
(a) PFD may retain the  services  of firms or  individuals  to act as dealers or
wholesalers  (collectively,  the  "Dealers") of the Class C Shares in connection
with the  offering  of Class C Shares,  (b) PFD may  compensate  any Dealer that
sells  Class C Shares in the  manner and at the rate or rates to be set forth in
an agreement  between PFD and such Dealer and (c) PFD may make such  payments to
the Dealers for distribution services out of the fee paid to PFD hereunder,  any
deferred sales charges imposed by PFD in connection with the repurchase of Class
C shares, its profits or any other source available to it;
<PAGE>

     WHEREAS,  the Trust, on behalf of the Fund,  recognizes and agrees that PFD
may impose certain  deferred sales charges in connection  with the repurchase of
Class C Shares by the Fund,  and PFD may retain (or receive  from the Trust,  as
the case may be) all such deferred sales charges; and

     WHEREAS,  the Board of Trustees of the Trust,  in  considering  whether the
Trust, on behalf of the Fund,  should adopt and implement this Class C Plan, has
evaluated such information as it deemed  necessary to an informed  determination
whether this Class C Plan should be adopted and  implemented  and has considered
such pertinent  factors as it deemed  necessary to form the basis for a decision
to use assets of the Trust for such purposes, and has determined that there is a
reasonable  likelihood that the adoption and implementation of this Class C Plan
will benefit the Trust and its Class C shareholders;

     NOW, THEREFORE, the Board of Trustees of the Trust hereby adopts this Class
C Plan for the Fund as a plan of  distribution  of Class C Shares in  accordance
with Rule 12b-1, on the following terms and conditions:

     1.  (a) The Trust,  on behalf of the Fund, is authorized to compensate  PFD
         for (1) distribution  services and (2) personal and account maintenance
         services  performed and expenses incurred by PFD in connection with the
         Fund's  Class C  Shares.  Such  compensation  shall be  calculated  and
         accrued daily and paid monthly or at such other  intervals as the Board
         of Trustees may determine.

                      (b) The amount of  compensation  paid  during any one year
              for distribution  services with respect to Class C Shares shall be
              .75% of the Fund's average daily net assets  attributable to Class
              C Shares for such year.

                      (c)  Distribution  services and expenses for which PFD may
              be compensated pursuant to this Plan include,  without limitation:
              compensation to and expenses (including allocable overhead, travel
              and telephone expenses) of (i) Dealers,  brokers and other dealers
              who are members of the National Association of Securities Dealers,
              Inc.  ("NASD")  or  their  officers,   sales  representatives  and
              employees,  (ii)  PFD and any of its  affiliates  and any of their
              respective officers,  sales  representatives and employees,  (iii)
              banks and their officers, sales representatives and employees, who
              engage in or support  distribution  of the Fund's  Class C Shares;
              printing  of reports  and  prospectuses  for other  than  existing
              shareholders; and preparation,  printing 


                                      -2-
<PAGE>

              and distribution of sales literature and advertising materials.

                      (d) The amount of  compensation  paid  during any one year
              for personal and account  maintenance  services and expenses shall
              be .25% of the Fund's  average  daily net assets  attributable  to
              Class C  Shares  for  such  year.  As  partial  consideration  for
              personal services and/or account maintenance  services provided by
              PFD to the Class C Shares,  PFD shall be  entitled  to be paid any
              fees payable  under this clause (d) with respect to Class C shares
              for  which  no  dealer  of  record  exists,  where  less  than all
              consideration  has  been  paid to a  dealer  of  record  or  where
              qualification standards have not been met.

                      (e)  Personal and account  maintenance  services for which
              PFD or any of its affiliates,  banks or Dealers may be compensated
              pursuant to this Plan include,  without limitation:  payments made
              to or on account  of PFD or any of its  affiliates,  banks,  other
              brokers  and  dealers  who  are  members  of the  NASD,  or  their
              officers,  sales  representatives  and  employees,  who respond to
              inquiries of, and furnish  assistance to,  shareholders  regarding
              their ownership of Class C Shares or their accounts or who provide
              similar  services  not  otherwise  provided by or on behalf of the
              Fund.

                      (f) PFD may  impose  certain  deferred  sales  charges  in
              connection  with the repurchase of Class C Shares by the Trust and
              PFD may retain (or  receive  from the Fund as the case may be) all
              such deferred sales charges.

                      (g)  Appropriate  adjustments to payments made pursuant to
              clauses  (b) and (d) of this  paragraph  1 shall be made  whenever
              necessary  to ensure that no payment is made by the Fund in excess
              of the  applicable  maximum cap imposed on asset based,  front-end
              and  deferred  sales  charges by  subsection  (d) of Section 26 of
              Article III of the Rules of Fair Practice of the NASD.

     2. The Trust, on behalf of the Fund,  understands  that agreements  between
PFD and Dealers may  provide for payment of fees to Dealers in  connection  with
the sale of Class C Shares and the provision of services to  shareholders of the
Fund.  Nothing in this Class C Plan shall be construed as requiring  the Fund to
make any  payment  to any  Dealer or to have any  obligations  to any  Dealer in
connection with services as a dealer of the Class C Shares.  PFD shall agree and
undertake  that any  agreement  entered  into  


                                      -3-
<PAGE>

between PFD and any Dealer  shall  provide that such Dealer shall look solely to
PFD for compensation for its services thereunder and that in no event shall such
Dealer seek any payment from Trust or the Fund.

     3. Nothing herein contained shall be deemed to require the Trust, on behalf
of the Fund, to take any action  contrary to its Declaration of Trust, as it may
be amended or restated from time to time, or By-Laws or any applicable statutory
or regulatory  requirement to which it is subject or by which it is bound, or to
relieve or deprive the Trust's Board of Trustees of the  responsibility  for and
control of the conduct of the affairs of the Fund.

     4.  This  Class  C Plan  shall  become  effective  upon  approval  by (i) a
"majority of the outstanding  voting securities" of Class C of the Trust, (ii) a
vote of the Board of  Trustees,  and (iii) a vote of a majority of the  Trustees
who are not "interested persons" of the Trust and who have no direct or indirect
financial  interest in the  operation  of the Class C Plan or in any  agreements
related to the Class C Plan (the "Qualified Trustees"),  such votes with respect
to (ii) and (iii) above to be cast in person at a meeting called for the purpose
of voting on this Class C Plan.

     5. This Class C Plan will remain in effect indefinitely, provided that such
continuance  is  "specifically  approved at least  annually" by a vote of both a
majority of the Trustees of the Trust and a majority of the Qualified  Trustees.
If such  annual  approval  is not  obtained,  this Class C Plan shall  expire on
January 31, 1997.

     6. This Class C Plan may be  amended at any time by the Board of  Trustees,
provided  that this Class C Plan may not be amended to increase  materially  the
limitations on the annual percentage of average net assets which may be expended
hereunder  without the  approval of holders of a  "majority  of the  outstanding
voting  securities" of Class C of the Fund and may not be materially  amended in
any case  without a vote of a majority of both the  Trustees  and the  Qualified
Trustees.  This  Class  C Plan  may be  terminated  at any  time  by a vote of a
majority of the Qualified Trustees or by a vote of the holders of a "majority of
the outstanding voting securities" of Class C of the Fund.

     7. The Trust,  on behalf of the Fund,  and PFD shall provide to the Trust's
Board of Trustees, and the Board of Trustees shall review, at least quarterly, a
written report of the amounts  expended under this Class C Plan and the purposes
for which such expenditures were made.

                                      -4-
<PAGE>

     8. While this Class C Plan is in effect,  the selection  and  nomination of
Qualified  Trustees shall be committed to the discretion of the Trustees who are
not "interested persons" of the Trust.

     9.  For  the  purposes  of  this  Class C  Plan,  the  terms  "assignment,"
"interested  persons,"  "majority  of the  outstanding  voting  securities"  and
"specifically approved at least annually" are used as defined in the 1940 Act.

     10. The Trust, on behalf of the Fund, shall preserve copies of this Class C
Plan, and each agreement related hereto and each report referred to in Paragraph
7 hereof  (collectively,  the "Records"),  for a period of not less than six (6)
years from the end of the fiscal year in which such Records were made and, for a
period  of two (2)  years,  each  of such  Records  shall  be kept in an  easily
accessible place.

     11. This Class C Plan shall be construed in accordance with the laws of The
Commonwealth of Massachusetts and the applicable provisions of the 1940 Act.

     12. If any  provision of this Class C Plan shall be held or made invalid by
a court decision,  statute, rule or otherwise, the remainder of the Class C Plan
shall not be affected thereby.











                                      -5-


[ARTICLE] 6
[CIK] 0000812195
[NAME] PIONEER MONEY MARKET TRUST
[SERIES]
   [NUMBER] 011
   [NAME] PIONEER CASH RESERVES CLASS A
[PERIOD-TYPE]                   YEAR
[FISCAL-YEAR-END]                          DEC-31-1995
[PERIOD-END]                               DEC-31-1995
[INVESTMENTS-AT-COST]                        177236677
[INVESTMENTS-AT-VALUE]                       177236677
[RECEIVABLES]                                  2404119
[ASSETS-OTHER]                                   24411
[OTHER-ITEMS-ASSETS]                             70013
[TOTAL-ASSETS]                               179735220
[PAYABLE-FOR-SECURITIES]                       5000000
[SENIOR-LONG-TERM-DEBT]                              0
[OTHER-ITEMS-LIABILITIES]                      3340705
[TOTAL-LIABILITIES]                            8340705
[SENIOR-EQUITY]                                      0
[PAID-IN-CAPITAL-COMMON]                     171670578
[SHARES-COMMON-STOCK]                        164096391
[SHARES-COMMON-PRIOR]                        173470628
[ACCUMULATED-NII-CURRENT]                            0
[OVERDISTRIBUTION-NII]                               0
[ACCUMULATED-NET-GAINS]                       (276063)
[OVERDISTRIBUTION-GAINS]                             0
[ACCUM-APPREC-OR-DEPREC]                             0
[NET-ASSETS]                                 171394515
[DIVIDEND-INCOME]                                    0
[INTEREST-INCOME]                             10082013
[OTHER-INCOME]                                       0
[EXPENSES-NET]                               (1443220)
[NET-INVESTMENT-INCOME]                        8638793
[REALIZED-GAINS-CURRENT]                         (639)
[APPREC-INCREASE-CURRENT]                            0
[NET-CHANGE-FROM-OPS]                          8638154
[EQUALIZATION]                                       0
[DISTRIBUTIONS-OF-INCOME]                    (8479787)
[DISTRIBUTIONS-OF-GAINS]                             0
[DISTRIBUTIONS-OTHER]                                0
[NUMBER-OF-SHARES-SOLD]                      548292258
[NUMBER-OF-SHARES-REDEEMED]                  565382384
[SHARES-REINVESTED]                            7715889
[NET-CHANGE-IN-ASSETS]                       (1800689)
[ACCUMULATED-NII-PRIOR]                              0
[ACCUMULATED-GAINS-PRIOR]                     (275424)
[OVERDISTRIB-NII-PRIOR]                              0
[OVERDIST-NET-GAINS-PRIOR]                           0
[GROSS-ADVISORY-FEES]                           684689
[INTEREST-EXPENSE]                                   0
[GROSS-EXPENSE]                                1996132
[AVERAGE-NET-ASSETS]                         167700948
[PER-SHARE-NAV-BEGIN]                             1.00
[PER-SHARE-NII]                                   0.05
[PER-SHARE-GAIN-APPREC]                              0
[PER-SHARE-DIVIDEND]                            (0.05)
[PER-SHARE-DISTRIBUTIONS]                            0
[RETURNS-OF-CAPITAL]                                 0
[PER-SHARE-NAV-END]                               1.00
[EXPENSE-RATIO]                                   0.88
[AVG-DEBT-OUTSTANDING]                               0
[AVG-DEBT-PER-SHARE]                                 0
<PAGE>
[ARTICLE] 6
[CIK] 0000812195
[NAME] PIONEER MONEY MARKET TRUST
[SERIES]
   [NUMBER] 012
   [NAME] PIONEER CASH RESERVES CLASS B
[PERIOD-TYPE]                   YEAR
[FISCAL-YEAR-END]                          DEC-31-1995
[PERIOD-END]                               DEC-31-1995
[INVESTMENTS-AT-COST]                        177236677
[INVESTMENTS-AT-VALUE]                       177236677
[RECEIVABLES]                                  2404119
[ASSETS-OTHER]                                   24411
[OTHER-ITEMS-ASSETS]                             70013
[TOTAL-ASSETS]                               179735220
[PAYABLE-FOR-SECURITIES]                       5000000
[SENIOR-LONG-TERM-DEBT]                              0
[OTHER-ITEMS-LIABILITIES]                      3340705
[TOTAL-LIABILITIES]                            8340705
[SENIOR-EQUITY]                                      0
[PAID-IN-CAPITAL-COMMON]                     171670578
[SHARES-COMMON-STOCK]                          7574187
[SHARES-COMMON-PRIOR]                                0
[ACCUMULATED-NII-CURRENT]                            0
[OVERDISTRIBUTION-NII]                               0
[ACCUMULATED-NET-GAINS]                       (276063)
[OVERDISTRIBUTION-GAINS]                             0
[ACCUM-APPREC-OR-DEPREC]                             0
[NET-ASSETS]                                 171394515
[DIVIDEND-INCOME]                                    0
[INTEREST-INCOME]                             10082013
[OTHER-INCOME]                                       0
[EXPENSES-NET]                               (1443220)
[NET-INVESTMENT-INCOME]                        8638793
[REALIZED-GAINS-CURRENT]                         (639)
[APPREC-INCREASE-CURRENT]                            0
[NET-CHANGE-FROM-OPS]                          8638154
[EQUALIZATION]                                       0
[DISTRIBUTIONS-OF-INCOME]                     (159006)
[DISTRIBUTIONS-OF-GAINS]                             0
[DISTRIBUTIONS-OTHER]                                0
[NUMBER-OF-SHARES-SOLD]                       23024569
[NUMBER-OF-SHARES-REDEEMED]                   15595946
[SHARES-REINVESTED]                             145564
[NET-CHANGE-IN-ASSETS]                       (1800689)
[ACCUMULATED-NII-PRIOR]                              0
[ACCUMULATED-GAINS-PRIOR]                     (275424)
[OVERDISTRIB-NII-PRIOR]                              0
[OVERDIST-NET-GAINS-PRIOR]                           0
[GROSS-ADVISORY-FEES]                           684689
[INTEREST-EXPENSE]                                   0
[GROSS-EXPENSE]                                1996132
[AVERAGE-NET-ASSETS]                           4945606
[PER-SHARE-NAV-BEGIN]                             1.00
[PER-SHARE-NII]                                   0.03
[PER-SHARE-GAIN-APPREC]                              0
[PER-SHARE-DIVIDEND]                            (0.03)
[PER-SHARE-DISTRIBUTIONS]                            0
[RETURNS-OF-CAPITAL]                                 0
[PER-SHARE-NAV-END]                               1.00
[EXPENSE-RATIO]                                   1.66
[AVG-DEBT-OUTSTANDING]                               0
[AVG-DEBT-PER-SHARE]                                 0



                           PIONEER MONEY MARKET TRUST

                                  on behalf of

                           PIONEER CASH RESERVES FUND

                   Multiple Class Plan Pursuant to Rule 18f-3

                        Class A Shares and Class B Shares

                                December 5, 1995


     Each class of shares of PIONEER CASH RESERVES  FUND (the "Fund"),  a series
of PIONEER MONEY MARKET TRUST (the "Trust"),  will have the same relative rights
and  privileges  and be subject to the same sales  charges,  fees and  expenses,
except as set forth  below.  The Board of Trustees of the Fund may  determine in
the  future  that  other  distribution  arrangements,  allocations  of  expenses
(whether  ordinary  or  extraordinary)  or services to be provided to a class of
shares are appropriate and amend this Plan  accordingly  without the approval of
shareholders of any class. Except as set forth in the Fund's prospectus,  shares
may be  exchanged  only for shares of the same class of another  Pioneer  mutual
fund.

     Article I.  Class A Shares

     Class A Shares are sold at net asset value and subject to the initial sales
charge  schedule  or  contingent  deferred  sales  charge  ("CDSC")  and minimum
purchase  requirements  as set forth in the  Fund's  prospectus.  Class A Shares
shall be entitled to the shareholder services set forth from time to time in the
Fund's prospectus with respect to Class A Shares.  Class A Shares are subject to
fees calculated as a stated percentage of the net assets attributable to Class A
shares  under the Fund's  Class A Rule 12b-1  Distribution  Plan as set forth in
such  Distribution  Plan. The Class A Shareholders have exclusive voting rights,
if any,  with  respect to the Class A Rule  12b-1  Distribution  Plan.  Transfer
agency fees are allocated to Class A Shares on a per account basis except to the
extent,  if any, such an allocation  would cause the Fund to fail to satisfy any
requirement  necessary  to obtain or rely on a private  letter  ruling  from the
Internal Revenue Service ("IRS") relating to the issuance of multiple classes of
shares.  Class A shares  shall  bear the  costs  and  expenses  associated  with
conducting a shareholder meeting for matters relating to Class A shares.
<PAGE>


     Article II.  Class B Shares

     Class B Shares are sold at net asset value per share without the imposition
of an initial sales charge.  However, Class B shares redeemed within a specified
number of years of purchase will be subject to a CDSC as set forth in the Fund's
prospectus. Class B Shares are sold subject to the minimum purchase requirements
set forth in the Fund's  prospectus.  Class B Shares  shall be  entitled  to the
shareholder  services set forth from time to time in the Fund's  prospectus with
respect to Class B Shares.  Class B Shares are subject to fees  calculated  as a
stated  percentage  of the net assets  attributable  to Class B shares under the
Class B Rule 12b-1 Distribution Plan as set forth in such Distribution Plan. The
Class B  Shareholders  of the Fund have exclusive  voting  rights,  if any, with
respect to the Fund's Class B Rule 12b-1 Distribution Plan. Transfer agency fees
are allocated to Class B Shares on a per account basis except to the extent,  if
any, such an allocation  would cause the Fund to fail to satisfy any requirement
necessary to obtain or rely on a private  letter ruling from the IRS relating to
the issuance of multiple classes of shares.  Class B shares shall bear the costs
and  expenses  associated  with  conducting  a  shareholder  meeting for matters
relating to Class B shares.

     Class B Shares will automatically  convert to Class A Shares of the Fund at
the end of a specified  number of years after the initial purchase date of Class
B shares,  except as provided in the Fund's  prospectus.  Such  conversion  will
occur at the  relative  net  asset  value per share of each  class  without  the
imposition of any sales charge,  fee or other charge.  The conversion of Class B
Shares  to  Class  A  Shares  may be  suspended  if it is  determined  that  the
conversion  constitutes or is likely to constitute a taxable event under federal
income tax law.

     The  initial  purchase  date  for  Class  B  shares  acquired  through  (i)
reinvestment  of  dividends  on Class B Shares  or (ii)  exchange  from  another
Pioneer  mutual fund will be deemed to be the date on which the original Class B
shares were purchased.

     Article III.     Approval by Board of Trustees

     This Plan shall not take effect until it has been approved by the vote of a
majority (or whatever  greater  percentage  may,  from time to time, be required
under Rule 18f-3  under the  Investment  Company  Act of 1940,  as amended  (the
"Act")) of (a) all of the  Trustees of the Fund,  and (b) those of the  Trustees
who are not  "interested  persons" of the Fund, as such term may be from time to
time defined under the Act.

     Article IV.      Amendments

     No material  amendment to the Plan shall be effective unless it is approved
by the Board of Trustees in the same manner as is provided  for approval of this
Plan in Article III.




                                      -2-


                           PIONEER MONEY MARKET TRUST

                                  on behalf of

                           PIONEER CASH RESERVES FUND

                   Multiple Class Plan Pursuant to Rule 18f-3

                Class A Shares, Class B Shares and Class C Shares

                                January 31, 1996


     Each class of shares of PIONEER CASH RESERVES  FUND (the "Fund"),  a series
of PIONEER MONEY MARKET TRUST (the "Trust"),  will have the same relative rights
and  privileges  and be subject to the same sales  charges,  fees and  expenses,
except as set forth  below.  The Board of Trustees  may  determine in the future
that other distribution arrangements,  allocations of expenses (whether ordinary
or  extraordinary)  or  services  to  be  provided  to a  class  of  shares  are
appropriate and amend this Plan accordingly without the approval of shareholders
of any  class.  Except  as set forth in the  Fund's  prospectus,  shares  may be
exchanged only for shares of the same class of another Pioneer mutual fund.

     Article I.  Class A Shares

     Class A Shares are sold at net asset value and subject to the initial sales
charge  schedule  or  contingent  deferred  sales  charge  ("CDSC")  and minimum
purchase  requirements  as set forth in the  Fund's  prospectus.  Class A Shares
shall be entitled to the shareholder services set forth from time to time in the
Fund's prospectus with respect to Class A Shares.  Class A Shares are subject to
fees calculated as a stated percentage of the net assets attributable to Class A
shares  under the Fund's  Class A Rule 12b-1  Distribution  Plan as set forth in
such  Distribution  Plan. The Class A Shareholders have exclusive voting rights,
if any,  with  respect to the Class A Rule  12b-1  Distribution  Plan.  Transfer
agency fees are allocated to Class A Shares on a per account basis except to the
extent,  if any, such an allocation  would cause the Fund to fail to satisfy any
requirement  necessary  to obtain or rely on a private  letter  ruling  from the
Internal Revenue Service ("IRS") relating to the issuance of multiple classes of
shares.  Class A shares  shall  bear the  costs  and  expenses  associated  with
conducting a shareholder meeting for matters relating to Class A shares.

     Article II.  Class B Shares

     Class B Shares are sold at net asset value per share without the imposition
of an initial sales charge.  However, Class B 

<PAGE>

shares redeemed  within a specified  number of years of purchase will be subject
to a CDSC as set forth in the Fund's prospectus. Class B Shares are sold subject
to the minimum purchase requirements set forth in the Fund's prospectus. Class B
Shares shall be entitled to the shareholder services set forth from time to time
in the Fund's  prospectus  with  respect  to Class B Shares.  Class B Shares are
subject to fees calculated as a stated percentage of the net assets attributable
to Class B shares under the Class B Rule 12b-1 Distribution Plan as set forth in
such  Distribution  Plan.  The Class B  Shareholders  of the Fund have exclusive
voting  rights,  if  any,  with  respect  to  the  Fund's  Class  B  Rule  12b-1
Distribution Plan. Transfer agency fees are allocated to Class B Shares on a per
account basis except to the extent,  if any, such an allocation  would cause the
Fund to fail to satisfy any requirement necessary to obtain or rely on a private
letter  ruling  from the IRS  relating to the  issuance  of multiple  classes of
shares.  Class B shares  shall  bear the  costs  and  expenses  associated  with
conducting a shareholder meeting for matters relating to Class B shares.

     Class B Shares will automatically  convert to Class A Shares of the Fund at
the end of a specified  number of years after the initial purchase date of Class
B shares,  except as provided in the Fund's  prospectus.  Such  conversion  will
occur at the  relative  net  asset  value per share of each  class  without  the
imposition of any sales charge,  fee or other charge.  The conversion of Class B
Shares  to  Class  A  Shares  may be  suspended  if it is  determined  that  the
conversion  constitutes or is likely to constitute a taxable event under federal
income tax law.

     The  initial  purchase  date  for  Class  B  shares  acquired  through  (i)
reinvestment  of  dividends  on Class B Shares  or (ii)  exchange  from  another
Pioneer  mutual fund will be deemed to be the date on which the original Class B
shares were purchased.

     Article III.     Class C Shares

     Class C Shares are sold at net asset value per share without the imposition
of an initial sales charge.  However, Class C shares redeemed within one year of
purchase will be subject to a CDSC as set forth in the Fund's prospectus.  Class
C Shares are sold subject to the minimum purchase  requirements set forth in the
Fund's prospectus.  Class C Shares shall be entitled to the shareholder services
set forth from time to time in the  Fund's  prospectus  with  respect to Class C
Shares.  Class C Shares are subject to fees calculated as a stated percentage of
the net  assets  attributable  to Class C shares  under the  Class C Rule  12b-1
Distribution  Plan  as  set  forth  in  such  Distribution  Plan.  The  Class  C
Shareholders of the Fund have exclusive  voting rights,  if any, with respect to
the Fund's  Class C Rule  12b-1  Distribution  Plan.  Transfer  agency  fees are
allocated to Class C Shares on a 

                                      -2-
<PAGE>

per account basis except to the extent,  if any, such an allocation  would cause
the Fund to fail to satisfy  any  requirement  necessary  to obtain or rely on a
private letter ruling from the IRS relating to the issuance of multiple  classes
of shares.  Class C shares  shall bear the costs and  expenses  associated  with
conducting a shareholder meeting for matters relating to Class C shares.

     The  initial  purchase  date  for  Class  C  shares  acquired  through  (i)
reinvestment  of  dividends  on Class C Shares  or (ii)  exchange  from  another
Pioneer  mutual fund will be deemed to be the date on which the original Class C
shares were purchased.

     Article IV.      Approval by Board of Trustees

     This Plan shall not take effect until it has been approved by the vote of a
majority (or whatever  greater  percentage  may,  from time to time, be required
under Rule 18f-3  under the  Investment  Company  Act of 1940,  as amended  (the
"Act")) of (a) all of the Trustees of the Trust,  on behalf of the Fund, and (b)
those of the Trustees  who are not  "interested  persons" of the Trust,  as such
term may be from time to time defined under the Act.

     Article V.       Amendments

     No material  amendment to the Plan shall be effective unless it is approved
by the Board of Trustees in the same manner as is provided  for approval of this
Plan in Article IV.













                                      -3-




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