PIONEER MONEY MARKET TRUST
497, 1995-04-07
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                           PIONEER MONEY MARKET TRUST
                                60 State Street
                          Boston, Massachusetts 02109


                                             April 7, 1995


VIA ELECTRONIC TRANSMISSION

File Desk
Securities and Exchange Commission
Judiciary Plaza
450 Fifth Street, NW
Washington, DC  20549

     Re:      Pioneer Money Market Trust (the "Trust")
              File Nos. 33-13179 and 811-5099
              CIK No.0000812195`


Ladies and Gentlemen:

     Pursuant to Rule 497(c) and Rule 101 of Regulation S-T under the Securities
Act of 1933, attached for electronic filing are copies of the Trust's Prospectus
and  Statement of  Additional  Information  dated March 31, 1995.  The tags mark
paragraphs  changed  in the  Trust's  Prospectus  and  Statement  of  Additional
Information  since the filing of  Post-Effective  Amendment  No. 12 on March 29,
1995.

     If you have any  questions  concerning  the  foregoing or the  attachments,
please call the undersigned or Elizabeth Watson collect at (617) 742-7825.

                                             Very truly yours,



                                             /s/Eunice R. Simmons
                                             Eunice R. Simmons
                                             EDGAR Compliance Associate


Attachment(s)

cc:  Ms. Elizabeth Watson
     Ms. Collette B. Rajotte
     Joseph P. Barri, Esq.
     Elaine M. Hartnett, Esq.
     (all w/ copy of submission)



<PAGE>

[logo]PIONEER LOGO
Pioneer Cash Reserves Fund 
Pioneer U.S. Government Money Fund 
Pioneer Tax-Free Money Fund 


Class A and Class B Shares 
Prospectus March 31, 1995 



Pioneer Cash Reserves Fund, Pioneer U.S. Government Money Fund and Pioneer 
Tax-Free Money Fund (the "Funds") are money market funds. The Funds' Class A 
shares are offered without a sales charge. The Funds' investment objective is 
to provide high current income, preservation of capital and liquidity through 
investments in high-quality short-term securities. Each Fund employs different 
investment policies to achieve this investment objective. 



Pioneer Cash Reserves Fund (Class A and B Shares)--a portfolio of money market 
instruments, including: securities of the United States government and its 
agencies and instrumentalities; certificates of deposit; corporate commercial 
paper; and other debt instruments. 



Pioneer U.S. Government Money Fund (Class A Shares Only)--a portfolio of 
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. 



Pioneer Tax-Free Money Fund (Class A Shares Only)--a portfolio of obligations 
issued by states, territories and possessions of the United States ("U.S.") the 
interest on which is exempt from federal income tax. 



This Prospectus (Part A of the Registration Statement) provides information 
about the Funds that you should know before investing. Please read and keep it 
for your future reference. More information about the Funds is included in Part 
B, the Statement of Additional Information, dated March 31, 1995, 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 Funds at 60 State 
Street, Boston, Massachusetts 02109. Other information about the Funds has been 
filed with the Securities and Exchange Commission (the "SEC") and is available 
upon request and without charge. 


The yield for each Fund will fluctuate. Shares in the Funds 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 FUNDS ARE NEITHER INSURED 
NOR GUARANTEED BY THE UNITED STATES GOVERNMENT. THERE CAN BE NO ASSURANCE THAT 
THE FUNDS WILL BE ABLE TO MAINTAIN A STABLE NET ASSET VALUE OF $1.00 PER SHARE. 

<TABLE>
<CAPTION>


       TABLE OF CONTENTS                                          PAGE 
<S>      <C>                                                       <C>
I.       EXPENSE INFORMATION                                        2 
II.      FINANCIAL HIGHLIGHTS                                       3 
III.     THE TRUST                                                  4 
IV.      THREE INVESTMENT PROGRAMS                                  4 
          Suitability                                               4 
          Investment Policies                                       4 
          Additional Information                                    6 
V.       FUND SHARE ALTERNATIVES                                    6 
          Class A Shares                                            6 
          Class B Shares                                            6 
VI.      SHARE PRICE                                                7 
VII.     HOW TO BUY FUND SHARES                                     7 
VIII.    HOW TO SELL FUND SHARES                                    9 
IX.      HOW TO EXCHANGE FUND SHARES                               10 
X.       DISTRIBUTION PLANS                                        11 
XI.      DIVIDENDS, DISTRIBUTIONS AND TAXATION                     11 
XII.     MANAGEMENT OF THE TRUST                                   12 
XIII.    DESCRIPTION OF SHARES AND VOTING RIGHTS                   13 
XIV.     SHAREHOLDER SERVICES                                      13 
          Account and Confirmation Statements                      14 
          Additional Investments                                   14 
          Automatic Investment Plans                               14 
          Financial Reports and Tax Information                    14 
          Dividend Options                                         14 
          Voluntary Tax Withholding                                14 
          Retirement Plans                                         14 
          Yield Information                                        14 
          Telecommunications Device for the Deaf (TDD)             14 
          Systematic Withdrawal Plans                              15 
          Telephone Transactions and Related Liabilities           15 
XV.      INVESTMENT RESULTS                                        15 
XVI.     APPENDIX                                                  15 

</TABLE>


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 
Funds. The table reflects annual operating expenses based upon actual expenses 
of the Class A shares for the fiscal year ended December 31, 1994, expressed as 
a percentage of the average net assets of each Fund. 
<TABLE>
<CAPTION>
                                                            Pioneer Cash 
                                                           Reserves Fund 
Shareholder Transaction Expenses:                     Class A        Class B 
<S>                                                   <C>            <C>
Maximum Initial Sales Charge on Purchases (as a 
  percentage of offering price)                        None            None 
Maximum Sales Charge on Reinvestment of 
  Dividends                                            None            None 
Maximum Deferred Sales Charge (as a percentage 
  of original purchase price or redemption 
  price, as applicable)                                None            4.00% 
Redemption Fee(1)                                      None            None 
Exchange Fee                                           None            None 
Annual Operating Expenses (as a percentage of 
  net assets):(3) 
Management Fee (after Expense Limitation)(2)           0.25%           0.25% 
12b-1 Fees                                             0.10%           1.00% 
Other Expenses (including transfer agent fee, 
  custodian fees and accounting and printing 
  expenses)                                            0.50%           0.50% 
Total Operating Expenses: 
  (after Expense Limitation)(2)                        0.85%           1.75% 
</TABLE>


<TABLE>
<CAPTION>
                                                       Pioneer           Pioneer 
                                                     U.S. Govern-       Tax-Free 
                                                      ment Money          Money 
                                                         Fund             Fund 
<S>                                                     <C>               <C>
Shareholder Transaction Expenses: 
Maximum Initial Sales Charge on Purchases (as a 
  percentage of offering price)                         None              None 
Maximum Sales Charge on Reinvestment of 
  Dividends                                             None              None 
Redemption Fee(1)                                       None              None 
Exchange Fee                                            None              None 
Annual Operating Expenses 
   (as a percentage of net assets): 
Management Fee (after Expense Limitation)(2)            0.00%             0.00% 
12b-1 Fees                                              0.12%             0.09% 
Other Expenses (including transfer agent fee, 
  custodian fees and accounting and printing 
  expenses) 
  (after Expense Limitation)(2)                         0.73%             0.66% 
Total Operating Expenses 
  (after Expense Limitation)(2)                         0.85%             0.75% 
</TABLE>



(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 
    Funds' investment adviser, has agreed not to impose its management fee and 
    to make other arrangements, if necessary, to limit the operating expenses 
    of each Fund as listed below. This agreement is voluntary and temporary and 
    may be revised or terminated at any time. 



<TABLE>
<CAPTION>

                                                      Pioneer 
                                      Pioneer           U.S.           Pioneer 
                                        Cash         Government       Tax-Free 
                                      Reserves         Money            Money 
              Fund                      Fund            Fund            Fund 
<S>                                     <C>             <C>             <C>
Management Fee                          0.40%           0.40%           0.40% 
Expense Limitation                      0.85%*          0.85%           0.75% 
Expenses Absent Limitation 
 Other Expenses 
  Class A                               n/a             0.78%           1.63% 
  Class B                               n/a             n/a             n/a 
 Total Operating Expenses 
  Class A                               1.00%           1.30%           2.12% 
  Class B                               1.90%           n/a             n/a 
</TABLE>



*For Pioneer Cash Reserves Fund, the portion of fund-wide expenses attributable 
 to Class B shares will be reduced only to the extent such expenses are reduced 
 for the Class A shares of that Fund. 



(3) For Class B shares, percentages are based on estimated expenses that would 
    have been incurred during the previous fiscal year had Class B shares been 
    outstanding. 


 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: 
<TABLE>
<CAPTION>

                                    Pioneer Cash Reserves Fund 
                         1 Year      3 Years      5 Years      10 Years 
<S>                      <C>         <C>          <C>          <C>
Class A Shares             $ 9         $27         $  47         $  104 
Class B Shares 
  --Assuming 
  complete 
    redemption at 
    end of period          $58         $85         $ 115         $184* 
 --Assuming no 
    redemption             $18         $55         $ 95          $184* 
</TABLE>



*Class B shares convert to Class A shares eight years after purchase; 
 therefore, Class A expenses are used after year eight. 
<TABLE>
<CAPTION>
                                   1 Year      3 Years      5 Years      10 Years 
<S>                                  <C>         <C>          <C>           <C>
Pioneer U.S. Government Money 
  Fund                               $9          $27          $47           $105 
Pioneer Tax-Free Money Fund          $8          $24          $42           $ 94 
</TABLE>



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 Funds for shares of 
certain other Pioneer mutual funds. See "How to Exchange Fund Shares." The 
payment of Rule 12b-1 fees by each fund may result in long-term shareholders of 
a Fund indirectly paying more than the economic equivalent of the maximum sales 
charge permitted under the National Association of Securities Dealers, Inc. 
Rules of Fair Practice. 
    



For further information regarding management fees, 12b-1 fees and other 
expenses of the Trust, 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 financial statements of the 
Funds which have been audited by Arthur Andersen LLP, independent public 
accountants. Arthur Andersen LLP's report on the Trust's financial statements 
as of December 31, 1994, 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. Class B shares are a new 
class of shares available only for Pioneer Cash Reserves Fund; no Financial 
Highlights exist for Class B 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, 
                                                                                                              June 22, 
                                                                                                              1987 to 
                                                                                                            December 31, 
                                 1994        1993      1992       1991       1990       1989       1988         1987 
<S>                            <C>         <C>        <C>       <C>        <C>        <C>        <C>          <C>
Net asset value, beginning 
  of period                    $   1.00    $  1.00    $  1.00   $  1.00    $   1.00   $  1.00    $  1.00      $  1.00 
Income from investment 
  operations: 
Net investment income          $   0.03    $  0.02    $  0.03   $  0.05    $   0.07   $  0.08    $  0.07      $  0.03 
Distributions to 
  shareholders from: 
Net investment income             (0.03)     (0.02)     (0.03)    (0.05)      (0.07)    (0.08)     (0.07)       (0.03) 
Net increase in net asset 
  value                        $   0.00    $  0.00    $  0.00   $  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   $  1.00    $  1.00      $  1.00 
Total return*                      3.57%      2.47%      3.06%     5.29%       7.74%     8.80%      7.05%        3.48% 
Ratio of net operating 
  expenses to average net 
  assets                           0.50%      0.75%      0.81%     0.88%       0.75%     0.82%      0.78%        0.53%** 
Ratio of net investment 
  income to average net 
  assets                           2.59%      2.44%      3.03%     5.23%       7.53%     8.43%      6.91%        6.94%** 
Net assets end of period 
  (in thousands)               $173,195    $64,841    $59,097   $73,010    $101,120   $80,121    $59,592      $34,756 
Ratios assuming no 
  reduction of fees or 
  expenses: 
Net operating expenses             0.65%      1.10%      1.01%        +           +         +       0.91%        1.01%** 
Net investment income              2.44%      2.09%      2.82%        +           +         +       6.77%        6.46%** 
</TABLE>



Pioneer U.S. Government Money Fund 
Selected Data for each Class A Share Outstanding For the Periods Presented 
<TABLE>
<CAPTION>
                                                         For the Year Ended December 31, 
                                                                                                                    April 11, 
                                                                                                                     1988 to 
                                                                                                                   December 31, 
                                      1994         1993         1992         1991         1990         1989            1988 
<S>                                 <C>          <C>          <C>          <C>          <C>          <C>              <C>
Net asset value, beginning of 
  period                            $  1.00      $  1.00      $  1.00      $  1.00      $  1.00      $  1.00          $ 1.00 
Income from investment 
  operations: 
Net investment income               $  0.04      $  0.03      $  0.03      $  0.05      $  0.07      $  0.08          $ 0.05 
Distributions to shareholders 
  from: 
Net investment income                 (0.04)       (0.03)       (0.03)       (0.05)       (0.07)       (0.08)          (0.05) 
Net increase in net asset value     $  0.00      $  0.00      $  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      $  1.00          $ 1.00 
Total return*                          3.65%        2.63%        3.19%        5.41%        7.61%        8.80%           5.34% 
Ratio of net operating expenses 
  to average net assets                0.63%        0.55%        0.59%        0.60%        0.60%        0.53%           0.50%** 
Ratio of net investment income 
  to average net assets                3.64%        2.61%        3.15%        5.29%        7.37%        8.37%           7.52%** 
Net assets end of period 
(in thousands)                      $29,101      $23,875      $23,619      $28,373      $27,828      $20,508          $9,503 
Ratios assuming no reduction of 
  fees or expenses: 
Net operating expenses                 1.08%        1.37%        1.24%        1.08%        0.80%        1.12%           1.13%** 
Net investment income                  3.19%        1.79%        2.50%        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. 


+ No reduction of fees or expenses in this period. 



                                        3 
<PAGE> 

Pioneer Tax-Free Money Fund 
Selected Data for each Class A Share Outstanding For the Periods Presented 


<TABLE>
<CAPTION>

                                                            For the Year Ended December 31, 
                                                                                                                     April 11, 
                                                                                                                      1988 to 
                                                                                                                    December 31, 
                                            1994        1993        1992        1991        1990        1989            1988 
<S>                                       <C>          <C>         <C>         <C>         <C>         <C>             <C>
Net asset value, beginning of period      $  1.00      $ 1.00      $ 1.00      $ 1.00      $ 1.00      $ 1.00          $ 1.00 
Income from investment operations: 
Net investment income                     $  0.02      $ 0.02      $ 0.02      $ 0.04      $ 0.05      $ 0.06          $ 0.04 
Distributions to shareholders from: 
Net investment income                       (0.02)      (0.02)      (0.02)      (0.04)      (0.05)      (0.06)          (0.04) 
Net increase in net asset value           $  0.00      $ 0.00      $ 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      $ 1.00          $ 1.00 
Total return*                                2.40%       1.92%       2.38%       4.00%       5.48%       6.06%           3.71% 
Ratio of net operating expenses to 
  average net assets                         0.50%       0.50%       0.50%       0.50%       0.50%       0.50%           4.98%** 
Ratio of net investment income to 
  average net assets                         2.34%       1.92%       2.33%       3.91%       5.37%       5.86%           5.13%** 
Net assets end of period (in 
  thousands)                              $10,059      $8,114      $7,241      $7,539      $6,968      $5,351          $3,272 
Ratios assuming no reduction of fees 
  or expenses: 
Net operating expenses                       1.87%       1.85%       2.07%       1.08%       1.91%       2.27%           1.50% 
Net investment income                        0.97%       0.57%       0.77%       4.81%       3.96%       4.09%           4.13%** 
</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. 



III. THE TRUST 



Pioneer Cash Reserves Fund, Pioneer U.S. Government Money Fund and Pioneer 
Tax-Free Money Fund are 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. The Trust has authorized an 
unlimited number of shares, which are currently organized into these three 
series, and continuously offers its shares to the public. Under normal 
conditions, each 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 Pioneer Tax- Exempt 
Money Fund, designated Class A, and, for Pioneer Cash Reserves Fund only, two 
classes of shares, designated Class A and Class B. 


IV. THREE INVESTMENT PROGRAMS 

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

Each of the three Funds 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 Funds will achieve their investment 
objective or that they will be able to maintain constant $1.00 net asset values 
per share. 


Suitability 

The Funds are 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 Funds 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. For further information concerning these fixed and variable rate 
securities, see the description of Pioneer Tax-Free Money Fund's investment 
policies below. 

(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. 


Pioneer U.S. Government Money 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 instrumen- 



                                        4 
<PAGE> 

talities 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. 



Pioneer Tax-Free Money Fund invests under normal conditions at least 80% of its 
portfolio in debt securities issued by or on behalf of states, territories and 
possessions of the United States and the District of Columbia and their 
political subdivisions, agencies or instrumentalities, the interest on which is 
exempt from federal income tax (hereafter called "tax-exempt securities"). The 
Fund's investments are limited to: 



(1) Tax-exempt securities, including (i) municipal bonds which are rated AAA or 
AA by S&P or Aaa or Aa by Moody's, (ii) tax anticipation notes, revenue 
anticipation notes and bond anticipation notes, which are rated SP-1+ or SP-1 
by S&P or MIG-1 or MIG-2 by Moody's and (iii) tax-exempt commercial paper rated 
A-1 by S&P or P-1 by Moody's; 



(2) Tax-exempt securities that are not rated but that, in the opinion of PMC, 
are of at least comparable quality to the two highest grades of S&P or Moody's; 
and 



(3) Taxable obligations issued or guaranteed by the U.S. government or its 
agencies or instrumentalities or taxable commercial paper rated A-1 or P-1. 


The Fund may purchase tax-exempt 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. The Fund's 
investments may include certificates of participation, which are a type of 
floating or variable rate obligation representing interests in a pool of 
tax-exempt securities held by a bank or other financial institution. 

In order to enhance the liquidity, stability or quality of a tax-exempt 
security or to shorten its maturity, the Fund may acquire a right to sell the 
obligation to another party at a guaranteed price approximating par value, 
either on demand or at specified intervals. The right to sell may form part of 
the obligation or be acquired separately by the Fund. These rights may be 
referred to as demand features or standby commitments, depending on their 
characteristics, and may involve letters of credit or other credit support 
arrangements supplied by domestic or foreign banks supporting the other party's 
ability to purchase the obligation from the Fund. In considering whether an 
obligation meets the Fund's quality standards, the Fund may look to the 
creditworthiness of the party providing the right to sell or to the quality of 
the obligation itself. Letters of credit issued by foreign banks (for which 
there may be less public information available) may involve certain risks such 
as future unfavorable political and economic developments, currency controls or 
other governmental restrictions which might affect payment by the bank. See the 
Statement of Additional Information for further description of these risks. 


The Fund intends to minimize the distribution of taxable income to 
shareholders. Thus, the Fund's investments in taxable obligations are limited 
to 20% of its assets and are intended only to meet short-term liquidity needs 
during periods of unusually adverse market conditions. For a description of how 
to compare yields on tax-exempt securities with yields on taxable securities, 
see the Appendix to this Prospectus. Dividends distributed to shareholders 
attributable to income or net gains from the sale of taxable and tax-exempt 
securities will generally be taxable to shareholders as ordinary income. See 
"Dividends, Distributions and Tax Status." However, the Fund has no intention 
of investing in "private activity bonds" or other tax-exempt securities whose 
interest is treated as a tax preference item resulting in tax liability to 
shareholders subject to the alternative minimum tax. 


Pioneer Tax-Free Money Fund may also purchase some tax- exempt securities on a 
"when-issued" basis, which means that up to 60 days may pass before they are 
delivered and paid for. The commitment to purchase a security for which payment 
will be made at a future date may be deemed a separate security. The purchase 
price and interest rate of "when-issued" securities is fixed at the time the 
commitment to purchase is made. Although the amount of tax-exempt securities 
for which there may be purchase commitments on a "when-issued" basis is not 
limited, it is expected that under normal circumstances not more than 10% of 
the total assets of the Fund will be committed to such purchases. The Fund does 
not start earning interest on "when-issued" securities until settlement is 
made. In order to invest the assets of the Fund immediately while awaiting 
delivery of securities purchased on a "when-issued" basis, short- term 
obligations that offer same-day settlement and earnings will normally be 
purchased. Although short-term investments will normally be in tax-exempt 
securities, short-term taxable securities may be purchased if suitable 
short-term tax-exempt securities are not available. 

When a commitment to purchase a security on a "when- issued" basis is made, 
procedures are established consistent with the General Statement of Policy of 
the SEC concerning such purchases. Because that policy currently recommends 
that an amount of the Fund's assets equal to the amount of the purchase be held 
aside or segregated to be used 

                                        5 
<PAGE> 
to pay for the commitment, cash or high-quality debt securities sufficient to 
cover any commitments are always expected to be available. However, although it 
is not intended that such purchases would be made for speculative purposes, and 
although the Fund intends to adhere to the provisions of the SEC policy, 
purchases of securities on a "when-issued" basis may involve more risk than 
other types of purchases. For example, when the time comes to pay for a 
"when-issued" security, portfolio securities of the Fund may have to be sold in 
order for the Fund to meet its payment obligations, and a sale of securities to 
meet such obligations carries with it a greater potential for the realization 
of capital gain, which is not tax-exempt. Also, if it is necessary to sell the 
"when-issued" security before delivery, the Fund may incur a loss because of 
market fluctuations since the time the commitment to purchase the "when-issued" 
security was made. Moreover, any gain resulting from any such sale would not be 
tax-exempt. Additionally, because of market fluctuations between the time of 
commitment to purchase and the date of purchase, the "when-issued" security may 
have a lesser (or greater) value at the time of purchase than the Fund's 
payment obligations with respect to the security. 

Additional Information 

In addition to the foregoing policies each Fund is subject to certain 
regulatory requirements. Each 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. 


Pioneer Cash Reserves 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). With respect to 75% of its total assets, 
Pioneer Tax-Free Money Fund may not invest more than 5% of its assets in 
securities subject to puts from the same institution. Pioneer Cash Reserves 
Fund and Pioneer U.S. Government Money Fund will not invest more than 5% of 
their respective 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, neither Fund will 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. 



Each of the Funds 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, Pioneer 
U.S. Government Money 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 Funds will not invest more than 25% of their assets in any one industry, 
except that there is no percentage limitation on investments in bank 
obligations or U.S. Government obligations. 

The Funds intend to hold their 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 Funds not to engage in trading for short-term profits. 
The Funds 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 Trust's investment objective. 


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


The investment characteristics of U.S. government obligations, bank 
obligations, commercial paper, repurchase agreements and tax-exempt securities 
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 



Pioneer U.S. Government Money and Pioneer Tax-Free Money Fund offer only one 
Class of shares, designated as Class A shares. Pioneer Cash Reserves Fund, 
however, continuously offers two Classes of shares designated as Class A and 
Class B 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 are offered by each Fund. 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. Class B shares are offered by Pioneer Cash Reserves Fund only. 
If your investment in Pioneer Cash Reserves Fund is for the long-term, Class A 
shares may be more appropriate than Class B shares. Purchases of the Class B 
shares of Pioneer Cash Reserves 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 
contingent deferred sales charge ("CDSC") of up to 4% if redeemed within six 
years. Class B shares are 


                                        6 
<PAGE> 

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. 



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 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 each Fund's shares is equal to the net 
asset value ("NAV") per share. The NAV per share of a Class of a 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. Each 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 net asset value 
per share, but, of course, this cannot be guaranteed. All assets of each 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 
Company ("PSC") at 1-800-225-6292 if you need assistance. 



The minimum initial investment is $1,000 for Class A and Class B 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 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. Each 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 Funds 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 net asset value 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 net asset value 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 or the Exchange closes early, 
or, in the PMC's judgment closing early is in the best interest of the Trust's 
shareholders, the Trust 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 


All purchases of Class B 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 in which you would like 
to purchase shares, to PSC at the above address. Cash will not be accepted. 
Your payment should be accompanied by a completed new 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 Trust, and the Trust 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 Trust. 



By Wire. (Class A shares only) When you wish to wire money to an existing 
Pioneer account, call PSC at 1-800-255-6292 to obtain complete instructions. 
You will be asked to instruct your bank to transmit same day funds by wire 
through 



                                        7 
<PAGE> 

the Federal Reserve banking system. The wiring instructions must include the 
following information: 
<TABLE>
<CAPTION>
<S>                             <C>
 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 # 
                                Name of Pioneer Fund 
</TABLE>



Federal funds directed to the Custodian must be pre-approved by calling PSC at 
1-800-255-6292. To be sure that a bank wire is accepted on the same day it is 
sent, you should give the Trust 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. Each Fund offers Class A shares at net asset value without the 
imposition of an initial sales charge by mail or by wire as described above. 



Class B Shares. Class B shares are offered only by Pioneer Cash Reserves Fund. 
You may buy Class B shares at net asset value 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 
then shares held longest during the six-year period. As a result, you will pay 
the lowest possible CDSC. 
<TABLE>
<CAPTION>
                                  CDSC as a Percentage of Dollar 
Year Since Purchase                   Amount Subject to CDSC 
<S>                                             <C>
First.                                          4.0% 
Second                                          4.0% 
Third                                           3.0% 
Fourth                                          3.0% 
Fifth                                           2.0% 
Sixth                                           1.0% 
Seventh and thereafter                          none 
</TABLE> 



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 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, 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. 



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



The CDSC on Class B shares and on any Class A shares subject to a CDSC may be 
waived or reduced for retirement plan accounts if: (a) the redemption results 
from the death or a total and permanent disability as defined in Section 72 of 
the Internal Revenue Code of 1986, as amended (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 



                                        8 
<PAGE> 

fund and which will be subject to the applicable CDSC upon redemption; (e) the 
distribution is in the form of a loan to a participant in a plan which permits 
loans (each repayment of the loan will constitute a new sale which will be 
subject to the applicable CDSC upon redemption); or (f) the distribution is 
from a qualified defined contribution plan and represents a participant's 
directed transfer (provided that this privilege has been pre-authorized through 
a prior agreement with PFD regarding participant directed transfers). 



The CDSC on Class B shares and on any Class A shares subject to a CDSC may be 
waived or reduced for either non- retirement or retirement plan accounts if: 
(a) the redemption is made by any state, county, or city, or any 
instrumentality, department, authority, or agency thereof, which is prohibited 
by applicable laws from paying a CDSC in connection with the acquisition of 
shares of any registered investment 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. Pioneer Cash Reserve Fund's Class B shares may only be 
purchased through a securities broker or dealer. You may purchase Class A 
shares of any Fund in the Trust 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 either 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 Trust 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 Trust incurs and a separate charge may be made 
for any unpaid check. The Trust 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, 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: 
* 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. 
* 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 accepted, 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 accepted. 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, each 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 will be 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 each 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: 
 * you wish to sell over $50,000 worth of shares, 
 * your account registration or address has changed within the last 30 days, 
 * the check is not being mailed to the address on your account (address of 
   record), 
 * the check is not being made out to the account owners, or 
 * 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, 



                                        9 
<PAGE> 

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 are endorsed by the record owner(s) 
exactly as the shares are registered and the signature(s) are guaranteed by an 
eligible guarantor. You should be able to obtain a signature guarantee from a 
bank, broker, dealer, credit union (if authorized under state law), securities 
exchange or association, clearing agency or savings association. A notary 
public cannot provide a signature guarantee. Signature guarantees are not 
accepted by facsimile (fax). The Trust 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 Fund. You may redeem up to $50,000 of your 
shares by telephone or fax and receive the proceeds by check or by wire. 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: the wire must be sent to your previously designated bank wire 
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. 



   
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. 
    



Redemption Through Compatible Computer Facilities. Certain broker-dealers or 
other institutions may be able to redeem shares through compatible computer 
facilities. Contact PSC at 1-800-225-6292 to determine whether your computer 
facilities are compatible and to receive further instructions. The proceeds of 
redemption requests received through compatible computer facilities before 
12:00 noon Eastern Time will normally be transmitted in Federal Funds on the 
same day and those shares will not receive the dividend declared on that 
business day. 



Small Accounts. The minimum account value is $500. If you hold shares of a 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 Trust 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 a Fund of 
securities owned by it is not reasonably practicable or it is not reasonably 
practicable for a 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 Fund 
out of which you wish to exchange and the name of the Fund into which you wish 
to exchange, your fund account number(s), the Class of shares to be exchanged 
and the dollar amount or number of shares to be exchanged. Written exchange 
requests must be signed by all record owner(s) exactly as the shares are 
registered. 



Telephone Exchanges. Your account is automatically authorized to have the 
telephone exchange privilege unless you indicated otherwise on your Account 
Application or by writing to the Fund. Proper account identification will be 
required for each telephone exchange. Telephone exchanges may not exceed 
$500,000 per account per day. All telephone exchange requests will be recorded. 
See "Telephone Transactions and Related Liabilities" below. 



Automatic Exchanges. You may automatically exchange shares from one Pioneer 
account for shares of the same Class in another Pioneer 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 any of the Funds in the 
Trust acquired through an exchange 


                                       10 
<PAGE> 

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 any Fund of the 
Trust 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 funds offer more than one Class of shares. A new Pioneer 
account opened through an exchange must have a registration identical to that 
on the original account. 



Class A or Class B 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 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. Shareholders will be given 60 days notice 
prior to any termination or change which materially limits the existing 
exchange privilege. 
    



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. To prevent abuse of the exchange privilege to the detriment of other 
Fund shareholders, the Trust and PFD reserve the right to limit the number 
and/or frequency of exchanges and/or to charge a fee for exchanges. The 
exchange privilege may be changed or discontinued and may be subject to 
additional limitations, including certain restrictions on purchases by market 
timer accounts. 



X. DISTRIBUTION PLANS 



The Trust, on behalf of the Funds, has adopted a Plan of Distribution for Class 
A shares ("Class A Plan") and, on behalf of Pioneer Cash Reserves Fund, for 
Class B shares ("Class B 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 
Fund'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 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. 



The Class B Plan provides 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 
Class B 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 Class B 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 
shares. PFD also receives the proceeds of any CDSC imposed on the redemption of 
Class B 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. Dealers may from 
time to time be required to meet certain criteria in order to receive service 
fees. PFD or its affiliates are entitled to retain all service fees payable 
under the Class B Plan for which there is no dealer of record or for which 
qualification standards have not been met as partial consideration for personal 
services and/or account maintenance services performed by PFD or its affiliates 
for shareholder accounts. 



XI. DIVIDENDS, DISTRIBUTIONS AND TAXATION 



Each Fund of the Trust has elected to be treated, has qualified and intends to 
qualify each year as a "regulated investment company" under Subchapter M of the 
Code so that it will not pay 


                                       11 
<PAGE> 

federal income taxes on income and capital gains distributed to shareholders at 
least annually. Under the Code, a 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. Each 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, each 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 a 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 in which you hold shares. 
    



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 shareholders of Pioneer Cash Reserves 
Fund and Pioneer U.S. Government Money Fund 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. 


The Code permits tax-exempt interest received by Pioneer Tax-Free Money Fund to 
flow through as tax-exempt "exempt interest dividends" to the Fund's 
shareholders, provided that at least 50% of the value of the total assets of 
the Fund at the close of each quarter of its taxable year consists of 
tax-exempt obligations. Although Pioneer Tax-Free Money Fund does not intend to 
invest in private activity bonds or other tax-exempt securities generating 
interest that is treated as a tax preference item for individuals subject to 
the federal alternative minimum tax, all tax-exempt distributions of the Fund 
may affect a corporate shareholder's liability for such tax. Distributions of 
income from certain investment activities of Pioneer Tax-Free Money Fund, such 
as repurchase agreements, may be taxable. 

Interest on indebtedness incurred by a shareholder of Pioneer Tax-Free Money 
Fund to purchase or carry shares of the Fund will generally not be deductible 
for federal income tax purposes. The Fund may also not be an appropriate 
investment for persons who are "substantial users" of facilities financed by 
private activity bonds or persons related to substantial users. Shareholders 
receiving social security or certain railroad retirement benefits may be 
subject to federal income tax on a portion of such benefits as a result of 
receiving investment income, including exempt-interest dividends and other 
distributions paid by the Fund. 

While Pioneer Tax-Free Money Fund seeks to maximize the percentage of income 
distributed which is not subject to federal income taxes, it is possible that 
under certain circumstances (see "Investment Policies") a small portion of the 
income dividends paid by the Fund will be subject to federal income tax. 


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 a 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 
Pioneer U.S. Government Money Fund or Pioneer Cash Reserves Fund that is 
attributable to the interest received from certain U.S. Government obligations 
will be exempt from state income taxation. Further, in some states, exempt- 
interest dividends received from Pioneer Tax-Free Money Fund may be exempt from 
state income taxation to the extent such dividends are attributable to interest 
on obligations issued by the particular state or its political subdivisions, 
agencies of instrumentalities. In some cases, state income tax rules that apply 
to such distributions may condition either of these exemptions on certain 
concentration, designation, reporting or other requirements, and these Funds 
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 Funds. There are currently eight Trustees, 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 Trust is managed under a contract with PMC. PMC serves as investment 
adviser to the Trust and is responsible for the overall management of the 
Trust's business affairs, subject 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 three Funds that make up the Trust, PMC also manages and 
serves as the investment adviser for other mutual funds and is an investment 
adviser to certain other institutional accounts. PMC's and 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 each Fund 


                                       12 
<PAGE> 

in the Trust. 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 a Fund; 
(d) issue and transfer taxes, chargeable to a 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 a Fund to federal, state or other 
governmental agencies; (f) fees and expenses involved in registering and 
maintaining registrations of each 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 the SEC; (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 Fund 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 a Fund is a party. 


Orders for each 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 Trust or other Pioneer 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 each 
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 each 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, 1994, Pioneer Cash Reserves Fund, 
Pioneer U.S. Government Money Fund and Pioneer Tax-Free Money Fund incurred 
actual expenses of $1,117,021, $324,626 and $167,214, respectively, 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, 1994, 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 15% of the 
outstanding capital stock of PGI as of January 31, 1995. PMC is a wholly-owned 
subsidiary of PGI. 



XIII. DESCRIPTION OF SHARES AND VOTING RIGHTS 



The shares of the Trust are divided into three series. 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 three 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, designated Class A 
shares, for Pioneer U.S. Government Money and Pioneer Tax- Exempt Money Fund 
and two classes of shares, designated Class A and Class B, 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 and Class B shareholders have 
exclusive voting rights with respect to the Rule 12b-1 distribution plans 
adopted by holders of those shares in connection with the distribution of 
shares. 



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. 

                                       13 
<PAGE> 
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 for Class A shares and $500 for Class B shares) to PSC (account number 
and Class of shares should be clearly indicated). The bottom portion of a 
confirmation statement may be used as a remittance slip to make additional 
investments. Additions to your account, whether by check or through a Pioneer 
Investomatic Plan, are invested in full and fractional shares of the 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, each 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 each 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 fund account invested in a second Pioneer 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 Internal Revenue Service 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, Individual Retirement Accounts 
(IRA's), Section 401(k) salary reduction plans and Section 403(b) retirement 
plans for employees of associations, public school systems and charities, all 
of which are available in conjunction with investments in Pioneer Cash Reserves 
Fund and Pioneer U.S. Government Money Fund. The Account Application contained 
in 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 Funds. 

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. 

                                       14 
<PAGE> 
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 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 sell or exchange your Fund shares by telephone by 
calling 1-800-225-6292 between 8:00 a.m. and 8:00 p.m. Eastern Time on 
weekdays. See "Share Price," "How to Sell Fund Shares" and "How to Exchange 
Fund Shares" for more information. 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, a Fund may be liable for any 
loss due to unauthorized or fraudulent instructions. Each Fund may implement 
other procedures from time to time. In all other cases, neither a 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 a Fund by 
telephone to institute a redemption or exchange. You should communicate with a 
Fund in writing if you are unable to reach the Fund by telephone. 



XV. INVESTMENT RESULTS 



From time to time, each of the Funds may include in advertisements or other 
communications to existing or proposed shareholders its respective "yield" and 
"effective yield." The "yield" is computed by dividing a 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. 


Pioneer Tax-Free Money Fund may also from time to time advertise its taxable 
equivalent yield and taxable equivalent effective yield. The Fund's taxable 
equivalent yield is determined by dividing that portion of the Fund's yield 
(calculated as described above) that is tax exempt by one minus a stated 
marginal federal income tax rate. The Fund's taxable equivalent effective yield 
is determined in a similar manner. For further information on the computation 
of taxable equivalent yield, see the Appendix to this Prospectus. 

The yields of the Funds will vary from time to time depending on market 
conditions, the composition of the Funds' portfolios and operating expenses of 
the Funds. The temporary policy of the Funds' 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 Funds' investment objective and policies. At any time 
in the future, yield quotations may be higher or lower than past return or 
yield quotations, and there can be no assurance that any historical yield 
quotation will continue in the future. 

The Funds 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 Funds generally purchase 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 
Funds' 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 Funds may 

                                       15 
<PAGE> 
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 a 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 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 a 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 Funds engage 
in repurchase agreements. 



"Tax-Exempt Securities" are debt obligations issued to obtain funds for various 
public purposes, including the construction of a wide range of public 
facilities such as bridges, highways, housing, mass transportation, schools, 
streets and water and sewer works. Other public purposes for which tax-exempt 
municipal securities may be issued include refunding outstanding obligations, 
obtaining funds for general operating expenses, and obtaining funds to loan to 
other public institutions. Such obligations are included within the category of 
tax-exempt securities only if the interest paid thereon is both exempt from 
regular federal income tax and not an item of tax preference under the federal 
alternative minimum tax. There are a variety of short-term tax-exempt 
securities in which Pioneer Tax-Free Money Fund may invest, including: (i) tax 
anticipation notes, which finance working capital needs of municipalities and 
are issued in anticipation of the receipt of tax revenue; (ii) revenue 
anticipation notes, which are issued in expectation of the receipt of other 
kinds of revenue, such as federal revenues available under the federal revenue 
sharing program; (iii) bond anticipation notes, which are normally issued to 
provide interim financing until long-term financing can be arranged; and (iv) 
tax-exempt commercial paper, which includes short-term promissory notes issued 
by municipalities to supplement their cash flow. The two principal 
classifications of medium and long-term tax-exempt municipal securities are 
"general obligation" and "revenue" bonds. General obligation bonds are secured 
by the issuer's pledge of its faith, credit and taxing power for the payment of 
principal and interest. The payment of such bonds may be dependent upon an 
appropriation by the issuer's legislative body. The characteristics and 
enforcement of general obligation bonds vary according to the law applicable to 
the particular issuer. Revenue bonds are payable only from the revenues derived 
from a particular facility or class of facilities or, in some cases, from the 
proceeds of a special excise or other specific revenue source. There are, of 
course, variations in the security of all tax-exempt municipal securities, both 
within a particular classification and between classifications, depending on 
numerous factors. The yields on such securities are also dependent on a variety 
of factors, including general money market conditions, supply and demand and 
general conditions of the municipal securities markets, size of a particular 
offering, the maturity of the obligation and rating of the issue. The ratings 
of Moody's and S&P represent their opinions as to the quality of various 
tax-exempt municipal securities. It should be emphasized, however, that ratings 
are not absolute standards of quality. Consequently, securities with the same 
maturity, coupon and rating may have different yields while securities of the 
same maturity and coupon with different ratings may have the same yield. 


"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> 

Taxable Equivalent Yields* 


The tables below show the approximate taxable yields which are equivalent to 
hypothetical tax-exempt yields from 3% to 7% under Federal income tax laws 
applicable to individuals during 1994. 
<TABLE>
<CAPTION>
                                                                    Taxable Yield Required 
   Single Return          Joint Return        Tax                To Equal A Tax Free Yield Of: 
            (Taxable Income)*                 Rate       3%        4%        5%        6%         7% 
<S>                     <C>                   <C>       <C>       <C>       <C>       <C>        <C>
Up to $22,750           Up to $38,000         15.0%     3.53      4.71      5.88      7.06        8.24 
$22,751-$55,100         $38,001-$91,850       28.0%     4.17      5.56      6.94      8.33        9.72 
$55,101-$115,000        $91,851-$140,000      31.0%     4.35      5.80      7.25      8.70       10.12 
$115,001-$250,000       $140,001-$250,000     36.0%     4.69      6.25      7.81      9.38       10.94 
Over $250,000           Over $250,000         39.6%     4.97      6.62      8.78      9.93       11.95 
</TABLE>

 *Net amount subject to Federal income tax after deductions and exemptions. 
  Table does not reflect the effect of Deduction Limitation and Exemption 
  Phaseout described below** or of the alternative minimum tax, if any. Table 
  assumes person filing Single Return is not a married individual filing a 
  separate return, a surviving spouse, or a head of household. 

**Deduction Limitation: Each $100 of adjusted gross income ("AGI") in excess of 
  $111,800 ($55,900 for marrieds filing separately) causes the loss of $3 of 
  itemized deductions. This limitation affects all itemized deductions other 
  than medical expenses, investment interest, and casualty, theft and wagering 
  losses. However, not more than 80% of a taxpayer's itemized deductions can be 
  eliminated. The threshold amounts will be adjusted for inflation from year to 
  year. 
  Exemption Phaseout: Each $2,500 or fraction thereof of AGI in excess of 
  $167,700 for joint filers ($111,800 for single taxpayers) causes taxpayers to 
  lose 2% of their personal exemptions. The threshold amounts will be adjusted 
  for inflation from year to year. 

Some tax brackets and the threshold amounts will be adjusted for inflation in 
1994. 

The following formula can be used to calculate a taxable yield 
which is equivalent to the corresponding tax-free yield: 

       Tax Free Yield        = Taxable Equivalent Yield 
     1 - Your Tax Bracket 

For example, if you are in the 28% tax bracket and earn a tax-free 
yield of 5%, the taxable equivalent yield would be 6.94%. 

   5%   =  .05  = 6.94% 
1 - 28%    .72 

There can be no assurance that the Pioneer Tax-Free Money Fund will achieve any 
specific tax-exempt yield. While it is expected that a substantial portion of 
the interest income distributed to investors in the Tax-Free Fund will be 
exempt from regular federal income taxes, portions of such distributions may be 
subject to regular federal income tax or federal alternative minimum tax. In 
addition, all or a substantial portion of such distributions may be subject to 
state and local taxes. Subsequent tax law changes could result in prospective 
or retroactive changes in the tax brackets, tax rates and tax equivalent yields 
set forth above. 

                                       17 
<PAGE> 
[logo]PIONEER LOGO
Pioneer Cash Reserves Fund 
Pioneer U.S. Government Money Fund 
Pioneer Tax-Free 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 

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 
 telephone transactions  ..................................1-800-225-6292 
Automated fund yields, 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 


0395-2371 
(C)The Pioneer Group, Inc. 


Pioneer 
Cash Reserves 
Fund 

Pioneer 
U.S. Government 
Money Fund 

Pioneer 
Tax-Free 
Money Fund 


Class A and Class B Shares 
Prospectus 
March 31, 1995 

                                       









<PAGE>

                           Pioneer Cash Reserves Fund
                           Class A and Class B Shares
                       Pioneer U.S. Government Money Fund
                                 Class A Shares
                          Pioneer Tax-Free Money Fund
                                 Class A Shares

                                60 State Street
                          Boston, Massachusetts 02109


                      STATEMENT OF ADDITIONAL INFORMATION

                                 March 31, 1995


     This  Statement  of  Additional  Information  (Part  B of the  Registration
Statement)  is not a  Prospectus,  but  should be read in  conjunction  with the
Prospectus  dated March 31, 1995 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 Trust's financial statements for the
most recent fiscal year ended  December 31, 1994 are attached to this  Statement
of Additional Information.

                               TABLE OF CONTENTS
                                                                Page

1.   Investment Policies and Restrictions.........................2
2.   Management of the Trust......................................4
3.   Investment Adviser...........................................9
4.   Principal Underwriter........................................10
5.   Distribution Plans...........................................11
6.   Shareholder Servicing/Transfer Agent.........................13
7.   Custodian....................................................14
8.   Independent Public Accountants...............................14
9.   Portfolio Transactions.......................................14
10.  Tax Status...................................................16
11.  Description of Shares........................................18
12.  Certain Liabilities..........................................18
13.  Determination of Net Asset Value.............................19
14.  Systematic Withdrawal Plan...................................21
15.  Investment Results...........................................22
16.  Financial Statements.........................................

     Appendix A...................................................A-1
     Appendix B...................................................B-1

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

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


<PAGE>




1.   INVESTMENT POLICIES AND RESTRICTIONS

     The  Prospectus of the Trust (the  "Prospectus")  identifies the investment
objective of each series of the Trust:  Pioneer Cash Reserves Fund, Pioneer U.S.
Government  Money  Fund and  Pioneer  Tax-Free  Money  Fund  (collectively,  the
"Funds"),  and the principal  investment policies of the Funds. 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 a 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 such Fund's investment objectives and policies. For
this  purpose,  the issuer of a  tax-exempt  security is deemed to be the entity
(public or private)  primarily  responsible  for the payment of the principal of
and interest on the security.

     Certificates  of  Deposit.   Pioneer  Cash  Reserves  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 of less than $1 billion,  provided that
(i) the  principal  amounts of such  certificates  of deposit  are insured by an


                                       2
<PAGE>

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 Funds. These restrictions
cannot be changed for a Fund unless a majority of the outstanding  securities of
such 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.

     A 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).  None of the Funds  intends 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;


                                       3
<PAGE>

     (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 Funds, the Funds will not (i) pledge,  mortgage
or  hypothecate  their  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 a Fund,  (ii) commit  more than 10% of their  assets to illiquid
investments,  such as repurchase agreements that mature in more than seven days,
(iii)  invest  more  than 5% of  their  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 each 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 Funds.

2.   MANAGEMENT OF THE TRUST

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


                                       4
<PAGE>

JOHN F. COGAN, JR.,* Chairman of the Board, President and Trustee
     President and Director of The Pioneer  Group,  Inc.  ("PGI");  Chairman and
     Director of  Pioneering  Management  Corporation  ("PMC");  Chairman of the
     Board and Chief Executive  Officer of Pioneer  Winthrop  Advisers  ("PWA");
     Chairman  of the Board and  Director  of Pioneer  Funds  Distributor,  Inc.
     ("PFD");  Director of Pioneering  Services  Corporation ("PSC") and Pioneer
     Capital  Corporation  ("PCC");  President  and  Director  of Pioneer  Plans
     Corporation   ("PPC"),    Pioneer   Investment   Corp.   ("PIC"),   Pioneer
     International  Corp.  ("PIntl"),  and  Pioneer  Metals &  Technology,  Inc.
     ("PMT"); Chairman of the Board and Director of Teberebie Goldfields Limited
     ("TGL");  Chairman,  President and Director of Pioneer  Goldfields  Limited
     ("PGL");  Chairman of the Supervisory Board of Pioneer Fonds Marketing GmbH
     ("PFM"); and Chairman and Partner,  Hale and Dorr (counsel to the Fund). 60
     State Street, Boston, Massachusetts

RICHARD H. EGDAHL, M.D., Trustee
     Professor of Management,  Boston  University  School of  Management,  since
     1988;  Professor  of  Public  Health,  Boston  University  School of Public
     Health;  Professor  of Surgery,  Boston  University  School of Medicine and
     Boston  University  Health Policy  Institute;  Director,  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   utilization   management   firm)   and
     Springer-Verlag New York, Inc. (publisher);  Honorary Director,  Franciscan
     Children's  Hospital.  Boston University  Health Policy  Institute,  53 Bay
     State Road, Boston, Massachusetts

MARGARET B. W. GRAHAM, Trustee
     Manager of Research  Operations,  Xerox Palo Alto  Research  Center,  since
     September  1991;  Professor of  Operations  Management  and  Management  of
     Technology,  Boston University School of Management,  since 1989; Associate
     Dean, BUSM, 1988 to 1990 and previously, Associate Professor, Department of
     Operations Management, Boston University School of Management.
     The Keep, P. O. Box 110, Little Deer Isle, Maine 04650

JOHN W. KENDRICK, Trustee
          Professor  Emeritus of Economics,  George  Washington  University  and
          Adjunct Scholar, American Enterprise Institute.  Hyatt Residence, Apt.
          1521, 8100 Connecticut Avenue, Chevy Chase, Maryland 20815


                                       5
<PAGE>

MARGUERITE A. PIRET, Trustee
     President, Newbury, Piret & Company, Inc.
     (merchant banking firm).
     One State Street, Suite 415, Boston, Massachusetts

DAVID D. TRIPPLE,* Trustee and Executive Vice President
     Executive Vice  President and Director of PGI;  Director of PCC and Pioneer
     SBIC  Corporation  ("PSBIC");  Executive Vice President,  President,  Chief
     Investment  Officer  and a  Director  of  PMC.  60  State  Street,  Boston,
     Massachusetts

STEPHEN K. WEST, Trustee
     Partner, Sullivan & Cromwell (law firm)
     125 Broad Street, New York, New York

JOHN WINTHROP, Trustee
     President,  John  Winthrop  & Co.,  Inc.  (a private  investment  firm) and
     Director  of NUI Corp.,  Alliance  Capital  Reserves,  Alliance  Government
     Reserves  and  Alliance  Tax  Exempt  Reserves.  One  North  Adgers  Wharf,
     Charleston, South Carolina

SHERMAN B. RUSS, Vice President
     Vice President of PMC, Pioneer Bond Fund and Pioneer America Income Trust.

WILLIAM H. KEOUGH, Treasurer
     Treasurer of each of the Pioneer mutual funds; Senior Vice President, Chief
     Financial  Officer and  Treasurer of PGI;  Treasurer of PFD, PMC, PSC, PCC,
     PIC, PIntl, PMT, PGL and SBIC and Treasurer and Director of PPC.

ERIC RECKARD, Assistant Treasurer
     Assistant  Treasurer  to each of the Pioneer  Funds since 1994;  Manager of
     Fund Accounting for PMC and Assistant to Chief  Financial  Officer prior to
     1994.

JOSEPH P. BARRI, Secretary
     Secretary of PCC, PGI and PMC; and Partner,  Hale and Dorr  (counsel to the
Fund).

ROBERT NAULT, Assistant Secretary
     General  Counsel of PGI since 1995;  formerly of Hale and Dorr  (counsel to
     the Fund) where he most recently served as a junior partner.

     Each of the above,  with the  exception of Mr. Russ,  is an officer  and/or
trustee or director of the Pioneer Funds listed below.  The Trust's  Declaration
of Trust provides that the holders of two-thirds of its  outstanding  shares may


                                       6
<PAGE>

vote to remove a Trustee of the Trust at any  special  meeting of  shareholders.
The business address of all officers is 60 State Street,  Boston,  Massachusetts
02109.

     To the knowledge of the Trust,  no officer or Trustee of the Trust owned 5%
or more of the issued and outstanding shares of PGI on February 28, 1995, except
Mr. Cogan who then owned approximately 15% of such shares.

     At February 28,  1995,  the Trustees and officers of the Trust owned in the
aggregate  less  than  1% of the  outstanding  securities  of the  Trust.  As of
February 28, 1995,  PGI-Rollover  IRA  Custodian  for George E. Siek,  Sr. owned
approximately  6.95% of Pioneer  U.S.  Government  Money Fund's total assets and
Kirpet Co.  owned  approximately  9.95% of Pioneer  Cash  Reserves  Fund's total
assets.  To the knowledge of the Trust, as of February 28, 1995, no person other
than  mentioned  above  owned of  record  or  beneficially  more  than 5% of the
outstanding shares of any series of the Trust.

     PGI, a  publicly-owned  Delaware  corporation,  owns all of the outstanding
capital stock of PMC and PSC. PMC owns all of the  outstanding  capital stock of
PFD. The table below lists all the Pioneer Funds currently offered to the public
and the investment adviser and principal underwriter for each fund.

                                            Investment          Principal
Fund Name                                    Adviser           Underwriter

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


                                       7
<PAGE>

Pioneer Cash Reserves Fund                     PMC                 PFD
Pioneer U.S. Government Money Market Fund      PMC                 PFD
Pioneer Tax-Free Money Fund                    PMC                 PFD
Pioneer Interest Shares, Inc.                  PMC                 **

   * Pioneer Winthrop Advisers is the investment adviser of this fund.
  ** This fund is a closed-end investment company.


     PMC, the Fund's investment adviser, also manages the investments of certain
institutional private accounts.

     Compensation  of  Officers  and  Trustees.  The Trust pays no  salaries  or
compensation to any of its officers.  The Trust pays an annual  trustees' fee of
$100,  and a payment of $1,000  plus  expenses  per  meeting  attended,  to each
Trustee who is not affiliated with PMC, PFD or PSC and pays an annual  trustees'
fee of $500 plus expenses to each Trustee  affiliated  with PMC, PFD or PSC. Any
such fees and expenses paid to  affiliates or interested  persons of PMC, PFD or
PSC are  reimbursed to the Trust under its  Management  Contract.  The following
table sets forth certain  information  with respect to the  compensation of each
Trustee of the Trust:

<TABLE>
<CAPTION>

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

<S>                             <C>                                 <C>                          <C>    
John F. Cogan, Jr.***           $  500                              $0                           $ 9,000
Richard H. Egdahl, M.D.          3,400                               0                           $55,650
Margaret B.W. Graham             3,400                               0                           $55,650
John W. Kendrick                 3,400                               0                           $55,650
Marguerite A. Piret              4,300                               0                           $66,650
David D. Tripple***                500                               0                           $ 9,000
Stephen K. West                  4,000                               0                           $63,650
John Winthrop                    4,000                               0                           $63,650

<FN>
 *      As of Trust's fiscal year end.
 **     As of December 31, 1994 (calendar year end for all Pioneer Funds listed above).
 ***    All fees paid by the Trust to "interested" Trustees are reimbursed to the Trust by PMC.
</FN>
</TABLE>
                                       8
<PAGE>



3.  INVESTMENT ADVISER

     The Trust 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
Trust  (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 each 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  Funds  and if  necessary  to limit or
otherwise  reduce  other  operating  expenses to the extent  needed to limit the
expenses  of each  Fund  in  accordance  with  the  schedule  set  forth  in the
Prospectus   under  Note  2  to  "Expense   Information."   The  management  fee
attributable  to Class B 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 a
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 year ended  December  31,  1994,  pursuant to the expense
limitation  discussed  above, the management fees of Pioneer Cash Reserves Fund,
Pioneer U.S.  Government Money Fund and Pioneer Tax Free Money Fund were reduced
by $250,479, $117,274 and $36,209, respectively,  resulting in actual management
fees paid during such period of $214,043,  $0 and $0,  respectively.  During the
fiscal  year ended  December  31,  1993,  the  management  fees of Pioneer  Cash
Reserves Fund,  Pioneer U.S.  Government  Money Fund and Pioneer  Tax-Free Money
Fund were reduced by $201,232, $92,361 and $29,957,  respectively,  resulting in
actual  management  fees  paid  during  such  period  of  $28,991,  $0  and  $0,
respectively.  During the fiscal year ended  December 31, 1992,  the  management
fees of Pioneer  Cash  Reserves  Fund,  Pioneer U.S.  Government  Money Fund and
Pioneer  Tax-Free  Money Fund were  reduced by  $136,097,  $104,034 and $30,942,
respectively, resulting in actual management fees paid during such period to PMC
of $125,487, $0 and $0, respectively.


                                       9
<PAGE>

4.       PRINCIPAL UNDERWRITER

     PFD serves as the principal  underwriter  for the Trust in connection  with
the continuous  offering of the Trust's Class A shares and Pioneer Cash Reserves
Fund Class B shares.  During the  Trust's  two most  recently  completed  fiscal
years, no underwriting  commissions  were paid to PFD. PFD commenced  service as
the Trust's principal underwriter as of March 31, 1995.

     The Trust, on behalf of each 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  Trust's  shares,  except  for  expenses
incurred  by PFD for which it is  reimbursed  by the Trust  under the Rule 12b-1
distribution plans applicable to the Class A and Class B 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 Trust.  PFD also pays certain  expenses in connection with the
distribution  of the Trust's shares,  including the cost of preparing,  printing
and distributing  advertising or promotional materials, and the cost of printing
and distributing prospectuses and supplements to prospective  shareholders.  The
Trust  bears  the  cost of  registering  its  shares  under  federal  and  state
securities law and the laws of certain foreign countries.

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

     The Trust will not  generally  issue  shares for  consideration  other than
cash.  At the  Trust'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 Trust;  (ii) the  securities are acquired by the
Trust for investment and not for resale; (iii) the securities are not restricted
as to transfer  either by law or  liquidity of market;  and (iv) the  securities
have a value which is readily ascertainable. An exchange of securities for Trust
shares may be a taxable transaction to the shareholder.


                                       10
<PAGE>

     The redemption price of shares of beneficial  interest of the Trust may, at
the Manager's  discretion,  be paid in cash or portfolio  securities.  The Trust
has,  however,  elected to be governed by Rule 18f-1 under the 1940 Act pursuant
to which the Trust is obligated to redeem shares solely in cash up to the lesser
of $250,000 or 1% of the  Trust's net asset value  during any 90-day  period for
any one shareholder.  Should the amount of redemptions by any shareholder exceed
such limitation,  the Trust 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 Trust'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 each  Fund,  has  adopted a plan of  distribution
pursuant to Rule 12b-1  promulgated  by the  Commission  under the 1940 Act with
respect to Class A shares (the "Class A Plan") and a plan of  distribution  with
respect  to Class B shares of  Pioneer  Cash  Reserves  Fund only (the  "Class B
Plan") (together, the "Plans").

     Class A Plan. Pursuant to the Class A Plan a 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 each Fund pursuant to
the Class A Plan are  accrued  daily at a rate  which may not  exceed the annual
rate of 0.15% of a Fund's  average  daily  net  assets  attributable  to Class A
shares.

     Class B Plan.  The Class B Plan  provides  that Pioneer Cash  Reserves 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


                                       11
<PAGE>

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 Pioneer Cash Reserves 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 CDSCs  attributable  to Class B shares.  (See
"Distribution Plans" in the Prospectus.)

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

     No interested  person of the Trust, nor any Trustee of the Trust who is not
an interested person of the 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 each of the Funds and except
to the extent certain  officers may have an interest in PFD's  ultimate  parent,
PGI.

     The  Plans  were  adopted  by a  majority  vote of the  Board of  Trustees,
including  all of the Trustees who are not, and were not at the time they voted,
interested persons of the Trust, as defined in the 1940 Act (none of whom 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  each Fund and its current and future  shareholders.  Under their terms,


                                       12
<PAGE>

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 Trust's Class A Plan, on behalf of each Fund,  authorizing PFD,
in its  capacity as  principal  underwriter  of the Trust's  shares,  to receive
compensation  from the Trust  pursuant to the Class A Plan.  Under the  original
Class A Plan,  PFD served as  servicing  agent for the Trust 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 Trust,  on behalf of each Fund, for the services  described with
respect  to each  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 Trust 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 a 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.

     During the fiscal year ended  December 31, 1994,  the Funds  incurred total
distribution fees pursuant to the Class A Distribution Plan as follows:

     Pioneer Cash      Pioneer U.S. Government     Pioneer Tax-Free   
     Reserves Fund           Money Fund               Money Fund

        $165,050              $36,283                   $8,147

     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. There were no Class B Shares outstanding on December 31, 1994.

6.       SHAREHOLDER SERVICING/TRANSFER AGENT

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


                                       13
<PAGE>

     Under the terms of its contract  with the Trust,  PSC services  shareholder
accounts,  and  its  duties  include:  (i)  processing  sales,  redemptions  and
exchanges of shares of the Trust; (ii) distributing  dividends and capital gains
associated with Trust portfolio accounts;  and (iii) maintaining account records
and responding to 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 $27.45 per shareholder account from the Trust
as compensation for the services  described above.  This fee is set at an amount
determined  by vote of a majority of the  Trustees  (including a majority of the
Trustees who are not parties to the contract with PSC or  interested  persons of
any such parties) to be comparable to fees for such services being paid by other
investment companies.

7.       CUSTODIAN

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

8.       INDEPENDENT PUBLIC ACCOUNTANTS

     Arthur Andersen LLP, One International Place, Boston,  Massachusetts 02110,
are the Trust'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 Funds  intend to fully manage  their  portfolios  by buying and selling
securities,  as well as  holding  securities  to  maturity.  In  managing  their


                                       14
<PAGE>

portfolios,  the Funds seek to take advantage of market  developments  and yield
disparities, which may include use of the following strategies:

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

          (2)   lengthening  the  average   maturity  of  their   portfolios  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 Funds engage in portfolio  trading if they believe a transaction net of
costs (including taxes and custodian charges) will help in achieving the Trust's
investment objective.

     Decisions  relating to the purchase and sale of  securities  for the Funds,
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 Funds.  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 Funds.  Management believes that no exact dollar value can be calculated for
such services.


                                       15
<PAGE>

     During  the  fiscal  years  ended   December  31,  1994,   1993  and  1992,
respectively, the Funds 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 each 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 a 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 each
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  dividend  declared by a 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, a 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.

     Shareholders  of the  Pioneer  Tax Free  Money  Fund  should be aware  that
tax-exempt interest (including  "exempt-interest dividends" paid by the Fund) is
reportable  for federal  income tax  purposes  and that  shareholders  receiving
social  security  or  certain  railroad  retirement  benefits  may be subject to
federal  income  tax on up to 85% of these  benefits  as a result  of  receiving
investment income, including  exempt-interest  dividends and other distributions
paid by the Fund.  This Fund may realize  some  taxable  income from the taxable
investments described in the prospectus,  any recognized market discount income,
or a portion of discount from certain  stripped  tax-exempt  securities.  To the
extent that taxable income,  if any, is distributed to shareholders of the Fund,
the  distribution  of such taxable  income will be accounted  for on an "average
annualized" as opposed to an "actual earned" basis.  Although applicable tax law
is not  entirely  clear under all  circumstances,  the Fund  intends to take the


                                       16
<PAGE>

position that it is the tax owner of a municipal  obligation acquired subject to
a put option or standby  commitment or acquired or held with certain other types
of put rights.

     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 each 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 each Fund qualifies as an RIC
and meets  certain  income  source  requirements  under  Delaware Law, each Fund
should also not be required to pay Delaware corporation income tax.

     The exemption of exempt-interest  dividends for federal income tax purposes
does not  necessarily  result  in  exemption  under the tax laws of any state or
local taxing authority, which vary with respect to the taxation of such dividend
income.  It is possible that some states will exempt from tax that portion of an
exempt-interest  dividend which represents interest received by Pioneer Tax-Free
Money Fund on that state's  securities  or that portion of an ordinary  dividend
which  represents  interest  received by Pioneer U.S.  Government  Money Fund or
Pioneer  Cash  Reserves  Fund on  direct  obligations  of the  U.S.  Government.
Therefore,  such Funds will report annually to their 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 a 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 a Fund's shares  attributable  to direct  obligations of the U.S.  Government
and/or obligations issued by such state or its political subdivisions,  agencies
and instrumentalities may be exempt from such taxes.

     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


                                       17
<PAGE>

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  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 three series named herein.  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 two classes of shares of Pioneer Cash Reserves Fund, Class A shares and Class
B shares.  Each share of a class of the Pioneer Cash Reserves Fund represents an
equal proportionate interest in the assets of that Fund allocable to that class.
Upon  liquidation of the Pioneer Cash Reserves 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.

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


                                       18
<PAGE>

"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 each Fund in the Trust 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
    


                                       19
<PAGE>

   
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 each 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 a Fund
become  effective  and no shares are  tendered for  redemption,  such Fund's net
asset value per share may not be determined.

     The net asset  value per share of each  class of each Fund is  computed  by
taking  the  amount of the  value of all of a Fund's  assets  attributable  to a
class,  less its  liabilities  attributable  to a 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 each 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,  each  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  such  Fund  would  receive  if it sold  the
investment.  During periods of declining  interest rates, the yield on shares of
the  Funds  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 Funds resulted
in a lower aggregate portfolio value on a particular day, a prospective investor
in a 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.


                                       20
<PAGE>

     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  Funds'  portfolio  investments  based  upon  their
amortized cost and the concomitant  expectation to maintain the Funds' per share
net asset value of $1.00 is  permitted  in  accordance  with Rule 2a-7 under the
1940 Act pursuant to which the Funds must adhere to certain conditions which are
described in detail in the Prospectus. The Funds must maintain a dollar-weighted
average  portfolio  maturity of 90 days or less. The maturities of variable rate
demand instruments held in the Funds' portfolios 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 each Fund for the
purpose  of  maintaining  sales and  redemptions  at a single  value.  It is the
intention  of each 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 Funds' portfolio holdings by the Trustees,  at such intervals as they may
deem  appropriate,  to  determine  whether  the Funds' 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.

14.  SYSTEMATIC WITHDRAWAL PLAN

     The Systematic  Withdrawal Plan is designed to provide a convenient  method
of receiving fixed payments at regular  intervals from shares of any Fund in the
Trust deposited by the applicant under this Plan. Withdrawals from Class B share
accounts  are limited to 10% of the value of the account at the time the plan is
implemented (see the Prospectus).  You must deposit or purchase for deposit with
PSC shares of any 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.


                                       21
<PAGE>

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

     Systematic  Withdrawal  Plan  payments  are made from the  proceeds  of the
redemption of shares  deposited under the Plan in a Plan account.  To the extent
that such redemptions for periodic withdrawals exceed dividend income reinvested
in the Plan account, such redemptions will reduce and may ultimately exhaust the
number of  shares  deposited  in the Plan  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 Systematic Withdrawal Plan 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  Plan  have  been  redeemed.  The  fees  of PSC for  maintaining  Systematic
Withdrawal Plans are paid by the Trust.

15.  INVESTMENT RESULTS

     From time to time, the Funds will provide yield  quotations for Class A and
Class B shares.  These quotations are calculated by standard methods  prescribed
by the SEC and may from time to time be used in the Funds' 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 Funds 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 Funds  will vary  based on the
type,  quality  and  maturities  of the  securities  held in  their  portfolios,
fluctuations in short-term interest rates and changes in their expenses.

     The Funds' 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 or B 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


                                       22
<PAGE>

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 Funds 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 Funds for the seven-day  period ended
December 31, 1994 are as follows:

<TABLE>
<CAPTION>
                              Before Expense Limitation            After Expense Limitation
                                                 Effective                            Effective
Class A Shares              Yield                  Yield         Yield                  Yield

<S>                         <C>                   <C>            <C>                    <C>  
Pioneer Cash
Reserves Fund               4.64%                  4.75%         4.91%                  5.03%

Pioneer U.S.
Government Money
Fund                        4.24%                  4.34%         5.03%                  5.15%

Pioneer Tax-Free
Money Fund                  1.56%                  1.59%         4.63%                  4.73%
</TABLE>

Class B shares are a new class of shares  first  offered on the date  hereof for
Pioneer Cash Reserves Fund only.

     Pioneer  Tax-Free  Money Fund's taxable  equivalent  yield is determined by
dividing that portion of the Fund's yield  (calculated as described  above) that
is tax exempt by one minus a stated marginal federal income tax rate. The Fund's
taxable equivalent effective yield is determined by dividing that portion of the
Fund's effective yield (calculated as described above) that is tax exempt by one
minus a stated marginal  federal income tax rate. The Fund's taxable  equivalent
yield and taxable  equivalent  effective  yield  assume that the  proportion  of
income  of the  Fund  that is tax  exempt  over  the  seven-day  period  used in
determining the yield and effective  yield  quotations will be constant over the
52-week period over which such yield quotations are annualized. Pioneer Tax-Free
Money Fund's taxable equivalent yield and taxable equivalent effective yield for
the 7-day period ended  December 31, 1994,  for an investor in the 39.6% federal


                                       23
<PAGE>

income tax  bracket  were  7.67% and 7.83%,  respectively,  except  that  absent
expense limitations,  the Fund's taxable equivalent yield and taxable equivalent
effective yield would have been 2.58% and 2.63%, respectively.

     Automated   Information  Line  (FactFone).   FactFone,   Pioneer's  24-hour
automated information line, allows shareholders to dial toll-free 1-800-225-4321
and hear recorded fund information, including:

     o    net asset value prices for all Pioneer Funds;

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

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

     o    dividends and capital gains distributions on all funds.

     Yields are calculated in accordance with SEC mandated standard formulas.

     In addition, by using a personal identification number (PIN),  shareholders
may access their  account  balance and last three  transactions  and may order a
duplicate statement.

     All  performance  numbers  communicated  through  FactFone  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.




                                       24
<PAGE>


                                   APPENDIX A

                   Description of Municipal Bond, Short-Term
                       Note and Commercial Paper Ratings1

                        Moody's Investors Service, Inc.2

Municipal Bonds

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

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

Municipal Short-Term Notes

     MIG-1:  Notes which are rated  MIG-1 are judged to be of the best  quality,
enjoying strong  protection from  established  cash flows for their servicing or
from established and broad-based access to the market for refinancing, or both.

     MIG-2:  Notes which are rated MIG-2 are judged to be of high quality,  with
margins of protection ample though not so large as in the MIG-1 group.

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

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

                                      A-1
<PAGE>

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 Group3

Municipal Bonds

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

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

Municipal Short-Term Notes

     SP-1+:  Notes which are rated  SP-1+ are judged to be of the best  quality,
enjoying overwhelming safety characteristics.

     SP-1:  Notes which are rated SP-1 have a very strong or strong  capacity to
pay principal and interest.

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.

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

                                      A-2
<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,  most  respected and  successful
money managers in the United States.

     As of December 31, 1994,  PMC employed a professional  investment  staff of
46, with a combined  average of 14 years'  experience in the financial  services
industry.

     Total assets for all Pioneer funds at December 31, 1994 were  approximately
$10,037,952,211   representing  583,478  non-retirement   accounts  and  337,050
retirement  accounts.  At December  31,  1994,  there were  12,908,  921 and 391
non-retirement  shareholder accounts in Pioneer Cash Reserves Fund, Pioneer U.S.
Government Money Fund and Pioneer Tax-Free Money Fund,  respectively,  and there
were 1,965,  815 and 7 retirement  accounts for Pioneer Cash  Reserves  Fund and
Pioneer  U.S.   Government   Money  Fund  and  Pioneer   Tax-Free   Money  Fund,
respectively.













                                      B-1


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