FIDELITY MONEY MARKET TRUST
N-30D, 1998-10-07
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<TABLE>
<CAPTION>
<S>                                        <C>                   <C>               <C>             <C>             
INVESTMENTS AUGUST 31, 1998
 
Showing Percentage of Total Value of Investment in Securities
FEDERAL AGENCIES - 52.4%                                                                                           
 
DUE                                        ANNUALIZED YIELD AT   PRINCIPAL AMOUNT                  VALUE (NOTE 1)  
DATE                                       TIME OF PURCHASE                                                        
 
FANNIE MAE - 28.5%                                                                                                 
 
Agency Coupons - 22.5%                                                                                             
 
 9/1/98                                     5.49% (b)            $ 49,000,000                      $ 48,989,723    
 
 9/1/98                                     5.55 (b)              30,000,000                        29,990,178     
 
 9/5/98                                     5.43 (b)              81,000,000                        80,951,413     
 
 9/9/98                                     5.77                  16,000,000                        15,999,520     
 
 9/9/98                                     5.79                  12,290,000                        12,289,582     
 
 9/15/98                                    5.45 (b)              31,000,000                        30,978,452     
 
 9/17/98                                    5.43 (b)              59,000,000                        58,978,556     
 
 9/28/98                                    5.44 (b)              48,000,000                        47,963,546     
 
 10/2/98                                    5.35                  20,365,000                        20,366,777     
 
 10/30/98                                   5.54 (b)              48,000,000                        47,965,709     
 
 11/14/98                                   5.48 (b)              32,000,000                        31,981,333     
 
 11/20/98                                   5.73                  28,000,000                        27,991,163     
 
 11/28/98                                   5.46 (b)              110,000,000                       109,928,335    
 
 2/12/99                                    5.43                  30,000,000                        29,977,968     
 
 2/19/99                                    5.43                  19,000,000                        18,986,905     
 
 2/23/99                                    5.45                  13,000,000                        12,993,100     
 
 2/23/99                                    5.47                  16,000,000                        15,989,942     
 
 2/26/99                                    5.56                  32,000,000                        31,960,674     
 
 3/16/99                                    5.52                  32,000,000                        31,980,239     
 
 3/26/99                                    5.55                  45,000,000                        44,974,603     
 
 4/15/99                                    5.54                  15,000,000                        14,980,790     
 
                                                                                                    766,218,508    
 
Discount Notes - 6.0%                                                                                              
 
 9/15/98                                    5.52                  24,388,000                        24,336,121     
 
 9/21/98                                    5.51                  50,000,000                        49,849,167     
 
 1/15/99                                    5.53                  81,000,000                        79,353,720     
 
 6/14/99                                    5.41                  25,000,000                        23,969,208     
 
 8/4/99                                     5.43                  9,865,000                         9,388,488      
 
 8/4/99                                     5.44                  18,000,000                        17,128,855     
 
                                                                                                    204,025,559    
 
FEDERAL FARM CREDIT BANK - 1.8%                                                                                    
 
Agency Coupons - 1.8%                                                                                              
 
 9/2/98                                     5.76                  30,000,000                        29,999,895     
 
 9/10/98                                    5.47 (b)              30,000,000                        29,992,185     
 
                                                                                                    59,992,080     
 
FEDERAL HOME LOAN BANK - 15.1%                                                                                     
 
Agency Coupons - 13.4%                                                                                             
 
 9/1/98                                     5.49% (b)            $ 79,000,000                      $ 78,972,993    
 
 9/1/98                                     5.56 (b)              33,000,000                        32,996,081     
 
 9/1/98                                     5.63 (b)              32,000,000                        31,984,000     
 
 9/18/98                                    5.76                  46,000,000                        45,999,282     
 
 9/24/98                                    5.71                  20,000,000                        19,998,790     
 
 10/23/98                                   5.70                  30,000,000                        29,996,709     
 
 10/23/98                                   5.73                  30,000,000                        29,995,470     
 
 10/30/98                                   5.72                  23,795,000                        23,794,231     
 
 11/27/98                                   5.46 (b)              25,000,000                        24,984,764     
 
 12/17/98                                   5.81                  32,000,000                        31,994,747     
 
 3/11/99                                    5.48 (a)              32,000,000                        32,017,087     
 
 3/26/99                                    5.58                  30,000,000                        29,974,095     
 
 5/19/99                                    5.56                  18,000,000                        17,999,134     
 
 6/22/99                                    5.58                  23,365,000                        23,342,792     
 
                                                                                                    454,050,175    
 
Discount Notes - 1.7%                                                                                              
 
 1/15/99                                    5.53                  60,000,000                        58,780,987     
 
FREDDIE MAC - 6.3%                                                                                                 
 
Agency Coupons - 4.5%                                                                                              
 
 9/21/98                                    5.44 (b)              32,000,000                        31,981,854     
 
 11/27/98                                   5.54 (b)              31,000,000                        30,956,461     
 
 3/12/99                                    5.52                  24,000,000                        24,001,262     
 
 8/13/99                                    5.52                  66,000,000                        65,966,240     
 
                                                                                                    152,905,817    
 
Discount Notes - 1.8%                                                                                              
 
 12/7/98                                    5.50                  63,000,000                        62,087,594     
 
STUDENT LOAN MARKETING ASSOCIATION - 0.7%                                                                          
 
Agency Coupons - 0.7%                                                                                              
 
 2/10/99                                    5.53                  25,000,000                        24,970,975     
 
TOTAL FEDERAL AGENCIES                                                                           1,783,031,695              
 
</TABLE>
 
 
<TABLE>
<CAPTION>
<S>                                   <C>           <C>              <C>             
REPURCHASE AGREEMENTS - 47.6%                                                        
 
                                      MATURITY                       VALUE (NOTE 1)  
                                      AMOUNT                                         
 
In a joint trading account (Note 2)                                                  
(U.S. Government Obligations) dated:                                                 
 
6/16/98 due 9/16/98 At 5.55%          $ 15,212,750                   $ 15,000,000    
 
7/15/98 due 9/16/98 At 5.55%           31,301,088                     31,000,000     
 
7/16/98 due 9/16/98 At 5.55%           63,602,175                     63,000,000     
 
8/6/98 due 9/8/98 At 5.56%             22,112,127                     22,000,000     
 
7/6/98 due:                                                                          
 
9/9/98 At 5.56%                        91,913,539                     91,000,000     
 
9/9/98 At 5.56%                        23,230,894                     23,000,000     
 
3/23/98 due 9/14/98 At 5.56%           154,054,167                    150,000,000    
 
8/13/98 due 9/14/98 At 5.56%           35,172,978                     35,000,000     
 
8/20/98 due 10/19/98 At 5.56%          65,602,333                     65,000,000     
 
8/24/98 due 9/23/98 At 5.57%           63,292,425                     63,000,000     
 
7/2/98 due 9/30/98 At 5.57%            32,445,600                     32,000,000     
 
8/25/98 due 11/2/98 At 5.57%           50,533,792                     50,000,000     
 
8/12/98 due 11/10/98 At 5.57%          101,392,500                    100,000,000    
 
7/30/98 due 9/28/98 At 5.58%           49,455,700                     49,000,000     
 
7/1/98 due 9/29/98 At 5.58%            129,785,600                    128,000,000    
 
7/31/98 due 10/13/98 At 5.58%          32,367,040                     32,000,000     
 
8/26/98 due:                                                                         
 
9/2/98 At 5.60%                        33,035,933                     33,000,000     
 
9/2/98 At 5.60%                        33,035,933                     33,000,000     
 
8/3/98 due 1/13/99 At 5.60%            35,887,444                     35,000,000     
 
8/31/98 due 9/1/98 At 5.86%            572,280,079                    572,187,000    
 
TOTAL REPURCHASE AGREEMENTS                                         1,622,187,000                   
 
TOTAL INVESTMENTS - 100%                                          $ 3,405,218,695                  
 
</TABLE>
 
Total Cost for Income Tax Purposes  $ 3,405,218,695
LEGEND
(a) Security purchased on a delayed delivery or when-issued basis (see
Note 2 of Notes to Financial Statements).
(b) The coupon rate shown on floating or adjustable rate securities
represents the rate at period end. The due dates on these types of
securities reflects the next interest rate reset date or, when
applicable, the final maturity date.
INCOME TAX INFORMATION
At August 31, 1998, the fund had a capital loss carryforward of
approximately $278,000 of which $171,000, $105,000 and $2,000 will
expire on August 31, 2002, 2003 and 2004, respectively.
FINANCIAL STATEMENTS
 
 
 
<TABLE>
<CAPTION>
<S>                                                        <C>          <C>              
STATEMENT OF ASSETS AND LIABILITIES
                                                                        AUGUST 31, 1998  
 
ASSETS                                                                                   
 
Investment in securities, at value (including repurchase                $ 3,405,218,695  
agreements of $1,622,187,000) -                                                          
See accompanying schedule                                                                
 
Receivable for fund shares sold                                          74,999,021      
 
Interest receivable                                                      22,668,092      
 
 TOTAL ASSETS                                                            3,502,885,808   
 
LIABILITIES                                                                              
 
Payable to custodian bank                                  $ 237                         
 
Payable for investments purchased                           31,984,000                   
Regular delivery                                                                         
 
 Delayed delivery                                           32,017,087                   
 
Payable for fund shares redeemed                            35,575,260                   
 
Distributions payable                                       90,812                       
 
Accrued management fee                                      1,162,686                    
 
Other payables and accrued expenses                         18,341                       
 
 TOTAL LIABILITIES                                                       100,848,423     
 
NET ASSETS                                                              $ 3,402,037,385  
 
Net Assets consist of:                                                                   
 
Paid in capital                                                         $ 3,402,328,981  
 
Accumulated net realized gain (loss) on investments                      (291,596)       
 
NET ASSETS, for 3,402,231,181 shares outstanding                        $ 3,402,037,385  
 
NET ASSET VALUE, offering price and redemption price per                 $1.00           
share ($3,402,037,385 (divided by) 3,402,231,181 shares)                                 
 
</TABLE>
 
 
<TABLE>
<CAPTION>
<S>                                                    <C>           <C>            
STATEMENT OF OPERATIONS
                                                        YEAR ENDED AUGUST 31, 1998 
 
INTEREST INCOME                                                      $ 171,886,379  
 
EXPENSES                                                                            
 
Management fee                                         $ 12,714,749                 
 
Non-interested trustees' compensation                   11,607                      
 
 Total expenses before reductions                       12,726,356                  
 
 Expense reductions                                     (962,269)     11,764,087    
 
NET INTEREST INCOME                                                   160,122,292   
 
NET REALIZED GAIN (LOSS) ON INVESTMENTS                               (13,200)      
 
NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS                 $ 160,109,092  
 
</TABLE>
 
 
<TABLE>
<CAPTION>
<S>                                                       <C>               <C>               
STATEMENT OF CHANGES IN NET ASSETS
                                                          YEAR ENDED        YEAR ENDED        
                                                          AUGUST 31, 1998   AUGUST 31, 1997   
 
INCREASE (DECREASE) IN NET ASSETS                                                             
 
Operations                                                $ 160,122,292     $ 141,415,424     
Net interest income                                                                           
 
 Net realized gain (loss)                                  (13,200)          57,726           
 
 NET INCREASE (DECREASE) IN NET ASSETS RESULTING           160,109,092       141,473,150      
FROM OPERATIONS                                                                               
 
Distributions to shareholders from net interest income     (160,122,292)     (141,415,424)    
 
Share transactions at net asset value of $1.00 per share   4,216,554,049     3,458,323,232    
Proceeds from sales of shares                                                                 
 
 Reinvestment of distributions from net interest income    159,999,327       141,415,424      
 
 Cost of shares redeemed                                   (3,874,344,275)   (3,222,561,829)  
 
 NET INCREASE (DECREASE) IN NET ASSETS AND SHARES          502,209,101       377,176,827      
RESULTING FROM SHARE TRANSACTIONS                                                             
 
  TOTAL INCREASE (DECREASE) IN NET ASSETS                  502,195,901       377,234,553      
 
NET ASSETS                                                                                    
 
 Beginning of period                                       2,899,841,484     2,522,606,931    
 
 End of period                                            $ 3,402,037,385   $ 2,899,841,484   
 
</TABLE>
 
 
 
<TABLE>
<CAPTION>
<S>                               <C>      <C>      <C>      <C>      <C>      
FINANCIAL HIGHLIGHTS
                                            YEARS ENDED AUGUST 31,                          
 
                                  1998     1997     1996     1995     1994  
SELECTED PER-SHARE DATA                                                        
 
Net asset value, beginning        $ 1.000  $ 1.000  $ 1.000  $ 1.000  $ 1.000  
of period                                                                      
 
Income from Investment             .053     .052     .052     .053     .032    
Operations                                                                     
Net interest income                                                            
 
Less Distributions                                                             
 
 From net interest income          (.053)   (.052)   (.052)   (.053)   (.032)  
 
Net asset value, end of period    $ 1.000  $ 1.000  $ 1.000  $ 1.000  $ 1.000  
 
TOTAL RETURN A                     5.41%    5.31%    5.36%    5.46%    3.27%   
 
RATIOS AND SUPPLEMENTAL DATA                                                   
 
Net assets, end of period         $ 3,402  $ 2,900  $ 2,523  $ 2,270  $ 1,655  
(in millions)                                                                  
 
Ratio of expenses to average       .42%     .42%     .37% B   .42%     .42%    
net assets                                                                     
 
Ratio of expenses to average       .39% C   .39% C   .34% C   .42%     .42%    
net assets after expense                                                       
reductions                                                                     
 
Ratio of net interest income to    5.28%    5.16%    5.27%    5.38%    3.26%   
average net assets                                                             
 
</TABLE>
 
A THE TOTAL RETURNS WOULD HAVE BEEN LOWER HAD CERTAIN EXPENSES NOT
BEEN REDUCED DURING THE PERIODS SHOWN (SEE NOTE 5 OF NOTES TO
FINANCIAL STATEMENTS).
B FMR AGREED TO REIMBURSE A PORTION OF THE FUND'S EXPENSES DURING THE
PERIOD. WITHOUT THIS REIMBURSEMENT, THE FUND'S EXPENSE RATIO WOULD
HAVE BEEN HIGHER.
C FMR OR THE FUND HAS ENTERED INTO VARYING ARRANGEMENTS WITH THIRD
PARTIES WHO EITHER PAID OR REDUCED A PORTION OF THE FUND'S EXPENSES
(SEE NOTE 5 OF NOTES TO FINANCIAL STATEMENTS).
NOTES TO FINANCIAL STATEMENTS
For the period ended August 31, 1998 
 
 
1. SIGNIFICANT ACCOUNTING POLICIES.
Retirement Government Money Market Portfolio(the fund) is a fund of
Fidelity Money Market Trust (the trust) and is authorized to issue an
unlimited number of shares. The trust is registered under the
Investment Company Act of 1940, as amended (the 1940 Act), as an
open-end management investment company organized as a Delaware
business trust. The financial statements have been prepared in
conformity with generally accepted accounting principles which require
management to make certain estimates and assumptions at the date of
the financial statements. The following summarizes the significant
accounting policies of the fund:
SECURITY VALUATION. As permitted under Rule 2a-7 of the 1940 Act, and
certain conditions therein, securities are valued initially at cost
and thereafter assume a constant amortization to maturity of any
discount or premium.
INCOME TAXES. As a qualified regulated investment company under
Subchapter M of the Internal Revenue Code, the fund is not subject to
income taxes to the extent that it distributes substantially all of
its taxable income for its fiscal year. The schedule of investments
includes information regarding income taxes under the caption "Income
Tax Information."
INTEREST INCOME. Interest income, which includes amortization of
premium and accretion of discount, is accrued as earned. 
EXPENSES. Most expenses of the trust can be directly attributed to a
fund. Expenses which cannot be directly attributed are apportioned
among the funds in the trust.
DISTRIBUTIONS TO SHAREHOLDERS. Dividends are declared daily and paid
monthly from net interest income.
SECURITY TRANSACTIONS. Security transactions are accounted for as of
trade date. Gains and losses on securities sold are determined on the
basis of identified cost.
2. OPERATING POLICIES.
JOINT TRADING ACCOUNT. Pursuant to an Exemptive Order issued by the
Securities and Exchange Commission, the fund, along with other
affiliated entities of Fidelity Management & Research Company (FMR),
may transfer uninvested cash balances into one or more joint trading
accounts. These balances are invested in one or more repurchase
agreements for U.S. Treasury or Federal Agency obligations.
REPURCHASE AGREEMENTS. The underlying U.S. Treasury or Federal Agency
securities are transferred to an account of the fund, or to the Joint
Trading Account, at a bank custodian. The securities are
marked-to-market daily and maintained at a value at least equal to the
principal amount of the repurchase agreement (including accrued
interest). FMR, the fund's investment adviser, is responsible for
determining that the value of the underlying securities remains in
accordance with the market value requirements stated above. 
2. OPERATING POLICIES - 
CONTINUED
WHEN-ISSUED SECURITIES. The fund may purchase or sell securities on a
when-issued basis. Payment and delivery may take place a month or more
after the date of the transaction. The price of the underlying
securities is fixed at the time the transaction is negotiated. The
market values of the securities purchased on a when-issued or forward
commitment basis are identified as such in the fund's schedule of
investments. The fund may receive compensation for interest forgone in
the purchase of a when-issued security. The payables and receivables
associated with the purchases and sales of when-issued securities
having the same settlement date and broker are offset. When-issued
securities that have been purchased from and sold to different brokers
are reflected as both payables and receivables in the statement of
assets and liabilities under the caption "Delayed delivery." Losses
may arise due 
to changes in the market value of the underlying securities, if the
counterparty does not perform under the contract, or if the issuer
does not issue the securities due to political, economic, or other
factors.
RESTRICTED SECURITIES. The fund is permitted to invest in securities
that are subject to legal or contractual restrictions on resale. These
securities generally may be resold in transactions exempt from
registration or to the public if the securities are registered.
Disposal of these securities may involve time-consuming negotiations
and expense, and prompt sale at an acceptable price may be difficult.
At the end of the period, the fund had no investments in restricted
securities.
3. JOINT TRADING ACCOUNT. 
At the end of the period, the fund had 20% or more of its total
investments in repurchase agreements through a joint trading account.
These repurchase agreements were with entities whose creditworthiness
has been reviewed and found satisfactory by FMR. The investments in
repurchase agreements through the joint trading account are summarized
as follows:
SUMMARY OF JOINT TRADING
DATED AUGUST 31, 1998, DUE SEPTEMBER 1, 1998   5.86%
Number of dealers or banks 7
Maximum amount with one dealer or bank 26.8%
Aggregate principal amount of agreements $3,212,361,000
Aggregate maturity amount of agreements $3,212,883,565
Aggregate market value of transferred assets $3,285,651,549
Coupon rates of transferred assets 0% to 13.25%
Maturity dates of transferred assets 9/1/98 to 3/1/38
3. JOINT TRADING ACCOUNT - CONTINUED
SUMMARY OF JOINT TRADING - CONTINUED
DATED AUGUST 26, 1998, DUE SEPTEMBER 2, 1998   5.60%
Number of dealers or banks 1
Maximum amount with one dealer or bank 100%
Aggregate principal amount of agreements $100,000,000
Aggregate maturity amount of agreements $100,108,889
Aggregate market value of transferred assets $102,504,965
Coupon rates of transferred assets 6.0% to 9.0%
Maturity dates of transferred assets 8/1/00 to 9/1/28
DATED AUGUST 26, 1998, DUE SEPTEMBER 2, 1998   5.60%
Number of dealers or banks 1
Maximum amount with one dealer or bank 100%
Aggregate principal amount of agreements $400,000,000
Aggregate maturity amount of agreements $400,435,556
Aggregate market value of transferred assets $408,034,155
Coupon rates of transferred assets 6.14% to 6.15%
Maturity dates of transferred assets 8/1/08 to 4/1/34
DATED AUGUST 6, 1998, DUE SEPTEMBER 8, 1998   5.56%
Number of dealers or banks 1
Maximum amount with one dealer or bank 100%
Aggregate principal amount of agreements $65,000,000
Aggregate maturity amount of agreements $65,331,283
Aggregate market value of transferred assets $66,810,540
Coupon rates of transferred assets 0%
Maturity dates of transferred assets 1/1/24 to 11/1/37
DATED JULY 6, 1998, DUE SEPTEMBER 9, 1998   5.56%
Number of dealers or banks 1
Maximum amount with one dealer or bank 100%
Aggregate principal amount of agreements $41,000,000
Aggregate maturity amount of agreements $41,411,594
Aggregate market value of transferred assets $41,970,177
Coupon rates of transferred assets 8.50% to 9.0%
Maturity dates of transferred assets 5/15/16 to 2/15/28
3. JOINT TRADING ACCOUNT - CONTINUED
SUMMARY OF JOINT TRADING - CONTINUED
DATED JULY 6, 1998, DUE SEPTEMBER 9, 1998   5.56%
Number of dealers or banks 1
Maximum amount with one dealer or bank 100%
Aggregate principal amount of agreements $150,000,000
Aggregate maturity amount of agreements $151,505,833
Aggregate market value of transferred assets $153,549,427
Coupon rates of transferred assets 8.50% to 9.0%
Maturity dates of transferred assets 5/15/16 to 2/15/28
DATED MARCH 23, 1998, DUE SEPTEMBER 14, 1998   5.56%
Number of dealers or banks 1
Maximum amount with one dealer or bank 100%
Aggregate principal amount of agreements $300,000,000
Aggregate maturity amount of agreements $308,108,333
Aggregate market value of transferred assets $306,496,227
Coupon rates of transferred assets 8.50% to 9.0%
Maturity dates of transferred assets 1/15/16 to 1/15/28
DATED AUGUST 13, 1998, DUE SEPTEMBER 14, 1998   5.56%
Number of dealers or banks 1
Maximum amount with one dealer or bank 100%
Aggregate principal amount of agreements $100,000,000
Aggregate maturity amount of agreements $100,494,222
Aggregate market value of transferred assets $102,116,015
Coupon rates of transferred assets 5.50% to 10.0%
Maturity dates of transferred assets 1/1/01 to 9/1/28
DATED JUNE 16, 1998, DUE SEPTEMBER 16, 1998   5.55%
Number of dealers or banks 1
Maximum amount with one dealer or bank 100%
Aggregate principal amount of agreements $50,000,000
Aggregate maturity amount of agreements $50,709,167
Aggregate market value of transferred assets $51,598,468
Coupon rates of transferred assets 0%
Maturity dates of transferred assets 1/1/18 to 9/1/33
3. JOINT TRADING ACCOUNT - CONTINUED
SUMMARY OF JOINT TRADING - CONTINUED
DATED JULY 15, 1998, DUE SEPTEMBER 16, 1998   5.55%
Number of dealers or banks 1
Maximum amount with one dealer or bank 100%
Aggregate principal amount of agreements $100,000,000
Aggregate maturity amount of agreements $100,971,250
Aggregate market value of transferred assets $102,000,000
Coupon rates of transferred assets 0% to 8.50%
Maturity dates of transferred assets 9/1/03 to 4/1/35
DATED JULY 16, 1998, DUE SEPTEMBER 16, 1998   5.55%
Number of dealers or banks 1
Maximum amount with one dealer or bank 100%
Aggregate principal amount of agreements $200,000,000
Aggregate maturity amount of agreements $201,911,667
Aggregate market value of transferred assets $204,000,000
Coupon rates of transferred assets 0% to 8.50%
Maturity dates of transferred assets 9/1/03 to 4/1/35
DATED AUGUST 24, 1998, DUE SEPTEMBER 23, 1998   5.57%
Number of dealers or banks 1
Maximum amount with one dealer or bank 100%
Aggregate principal amount of agreements $100,000,000
Aggregate maturity amount of agreements $100,464,167
Aggregate market value of transferred assets $102,184,428
Coupon rates of transferred assets 0%
Maturity dates of transferred assets 1/1/23 to 8/1/34
DATED JULY 30, 1998, DUE SEPTEMBER 28, 1998   5.58%
Number of dealers or banks 1
Maximum amount with one dealer or bank 100%
Aggregate principal amount of agreements $80,000,000
Aggregate maturity amount of agreements $80,744,000
Aggregate market value of transferred assets $82,418,290
Coupon rates of transferred assets 5.50% to 12.0%
Maturity dates of transferred assets 9/1/98 to 8/1/28
3. JOINT TRADING ACCOUNT - CONTINUED
SUMMARY OF JOINT TRADING - CONTINUED
DATED JULY 1, 1998, DUE SEPTEMBER 29, 1998   5.58%
Number of dealers or banks 1
Maximum amount with one dealer or bank 100%
Aggregate principal amount of agreements $400,000,000
Aggregate maturity amount of agreements $405,580,000
Aggregate market value of transferred assets $411,860,802
Coupon rates of transferred assets 0% to 14.0%
Maturity dates of transferred assets 1/1/99 to 8/1/28
DATED JULY 2, 1998, DUE SEPTEMBER 30, 1998   5.57%
Number of dealers or banks 1
Maximum amount with one dealer or bank 100%
Aggregate principal amount of agreements $100,000,000
Aggregate maturity amount of agreements $101,392,500
Aggregate market value of transferred assets $102,369,112
Coupon rates of transferred assets 8.50% to 9.0%
Maturity dates of transferred assets 4/15/16 to 2/15/28
DATED JULY 31, 1998, DUE OCTOBER 13, 1998   5.58%
Number of dealers or banks 1
Maximum amount with one dealer or bank 100%
Aggregate principal amount of agreements $100,000,000
Aggregate maturity amount of agreements $101,147,000
Aggregate market value of transferred assets $102,962,959
Coupon rates of transferred assets 0% to 11.50%
Maturity dates of transferred assets 5/1/99 to 11/1/32
DATED AUGUST 20, 1998, DUE OCTOBER 19, 1998   5.56%
Number of dealers or banks 1
Maximum amount with one dealer or bank 100%
Aggregate principal amount of agreements $200,000,000
Aggregate maturity amount of agreements $201,853,333
Aggregate market value of transferred assets $205,890,943
Coupon rates of transferred assets 0%
Maturity dates of transferred assets 8/1/25 to 11/1/32
3. JOINT TRADING ACCOUNT - CONTINUED
SUMMARY OF JOINT TRADING - CONTINUED
DATED AUGUST 25, 1998, DUE NOVEMBER 2, 1998   5.57%
Number of dealers or banks 1
Maximum amount with one dealer or bank 100%
Aggregate principal amount of agreements $100,000,000
Aggregate maturity amount of agreements $101,067,583
Aggregate market value of transferred assets $102,204,727
Coupon rates of transferred assets 0%
Maturity dates of transferred assets 3/1/19 to 8/1/34
DATED AUGUST 12, 1998, DUE NOVEMBER 10, 1998   5.57%
Number of dealers or banks 1
Maximum amount with one dealer or bank 100%
Aggregate principal amount of agreements $140,000,000
Aggregate maturity amount of agreements $141,949,500
Aggregate market value of transferred assets $143,618,395
Coupon rates of transferred assets 0% to 12.50%
Maturity dates of transferred assets 10/1/98 to 8/1/28
DATED AUGUST 3, 1998, DUE JANUARY 13, 1999   5.60%
Number of dealers or banks 1
Maximum amount with one dealer or bank 100%
Aggregate principal amount of agreements $100,000,000
Aggregate maturity amount of agreements $102,535,556
Aggregate market value of transferred assets $102,000,000
Coupon rates of transferred assets 0% to 8.50%
Maturity dates of transferred assets 9/1/03 to 4/1/35
4. FEES AND OTHER TRANSACTIONS WITH AFFILIATES. 
MANAGEMENT FEE. As the fund's investment adviser, FMR pays all
expenses, except the compensation of the non-interested Trustees and
certain exceptions such as interest, taxes, brokerage commissions and
extraordinary expenses. FMR receives a fee that is computed daily at
an annual rate of .42% of the fund's average net assets.
SUB-ADVISER FEE. As the fund's investment sub-adviser, Fidelity
Investments Money Management, Inc., a wholly owned subsidiary of FMR,
receives a fee from FMR of 50% of the management fee payable to FMR.
The fee is paid prior to any voluntary expense reimbursements which
may be in effect.
5. EXPENSE REDUCTIONS.
FMR has entered into arrangements on behalf of the fund with the
fund's custodian and transfer agent whereby credits realized as a
result of uninvested cash balances were used to reduce a portion of
the fund's expenses. During the period, the fund's expenses were
reduced by $962,269 under these arrangements.
REPORT OF INDEPENDENT ACCOUNTANTS
 
 
To the Trustees of Fidelity Money Market Trust and the Shareholders of
Retirement Government Money Market Portfolio:
In our opinion, the accompanying statement of assets and liabilities,
including the schedule of investments, and the related statements of
operations and of changes in net assets and the financial highlights
present fairly, in all material respects, the financial position of
Retirement Government Money Market Portfolio (a fund of Fidelity Money
Market Trust) at August 31, 1998, and the results of its operations,
the changes in its net assets and the financial highlights for the
periods indicated, in conformity with generally accepted accounting
principles. These financial statements and financial highlights
(hereafter referred to as "financial statements") are the
responsibility of the Retirement Government Money Market Portfolio's
management; our responsibility is to express an opinion on these
financial statements based on our audits. We conducted our audits of
these financial statements in accordance with generally accepted
auditing standards which require that we plan and perform the audit to
obtain reasonable assurance about whether the financial statements are
free of material misstatement. An audit includes examining, on a test
basis, evidence supporting the amounts and disclosures in the
financial statements, assessing the accounting principles used and
significant estimates made by management, and evaluating the overall
financial statement presentation. We 
believe that our audits, which included confirmation of securities at
August 31, 1998 by correspondence with the custodian and brokers,
provide a reasonable basis for the opinion expressed above.
/s/PricewaterhouseCoopers LLP
PricewaterhouseCoopers LLP
Boston, Massachusetts
October 6, 1998
DISTRIBUTIONS
 
 
A total of 19.14% of the dividends distributed during the fiscal year
was derived from interest on U.S. Government securities which is
generally exempt from state income tax.
The fund will notify shareholders in January 1999 of the applicable
percentage for use in preparing 1998 income tax returns.
 
 
 
INVESTMENT ADVISER
Fidelity Management & 
 Research Company
Boston, MA
SUB-ADVISER
Fidelity Investments Money 
 Management, Inc.
Merrimack, NH
OFFICERS
Edward C. Johnson 3d, PRESIDENT
Robert C. Pozen, SENIOR VICE PRESIDENT
Fred L. Henning, Jr., VICE PRESIDENT
Boyce I. Greer, VICE PRESIDENT
Robert Litterst, VICE PRESIDENT
Eric D. Roiter, SECRETARY
Richard A. Silver, TREASURER
Stanley N. Griffith, 
 ASSISTANT VICE PRESIDENT
John H. Costello, ASSISTANT TREASURER
Leonard M. Rush, ASSISTANT TREASURER
Thomas J. Simpson, ASSISTANT TREASURER
BOARD OF TRUSTEES
Ralph F. Cox *
Phyllis Burke Davis *
Robert M. Gates *
Edward C. Johnson 3d
E. Bradley Jones *
Donald J. Kirk *
Peter S. Lynch
Marvin L. Mann *
William O. McCoy *
Gerald C. McDonough *
Robert C. Pozen
Thomas R. Williams *
ADVISORY BOARD
J. Gary Burkhead
* INDEPENDENT TRUSTEES
GENERAL DISTRIBUTOR
Fidelity Distributors Corporation
Boston, MA
TRANSFER AND SHAREHOLDER
SERVICING AGENT
Fidelity Investments Institutional 
 Operations Company, Inc.
Boston, MA
CUSTODIAN
The Bank of New York
New York, NY
(registered trademark)
 
 
<TABLE>
<CAPTION>
<S>                                                       <C>                   <C>           <C>             <C> 
INVESTMENTS AUGUST 31, 1998  
 
Showing Percentage of Total Value of Investment in Securities
 
CERTIFICATES OF DEPOSIT - 30.2% 
 
DUE                                                       ANNUALIZED YIELD AT   PRINCIPAL                     VALUE    
DATE                                                      TIME OF PURCHASE      AMOUNT                        (NOTE 1) 
 
CHICAGO BRANCH, YANKEE DOLLAR, FOREIGN BANK - 0.3% 
 
ABN-AMRO Bank NV 
 
 2/2/99                                                    5.54%                $ 25,000,000                  $ 24,995,863 
 
DOMESTIC CERTIFICATES OF DEPOSIT - 0.9% 
 
CoreStates Bank, NA, Philadelphia 
 
 9/9/98                                                    5.60 (b)              5,000,000                     5,000,000  
 
First Tennessee Bank, NA 
 
 9/14/98                                                   5.58                  15,000,000                    14,999,830
 
Fleet National Bank 
 
 9/15/98                                                   5.55                  50,000,000                    50,000,000
 
                                                                                                                69,999,830 
 
LONDON BRANCH, EURODOLLAR, DOMESTIC BANKS - 0.4% 
 
NationsBank, NA 
 
 2/16/99                                                   5.60                  30,000,000                    30,000,000 
 
LONDON BRANCH, EURODOLLAR, FOREIGN BANKS - 7.8% 
 
Abbey National Treasury Services, PLC 
 
 9/28/98                                                   5.60                  25,000,000                    25,000,000 
 
 10/6/98                                                   5.61                  50,000,000                    50,000,000 
 
Australia & New Zealand Banking Group Ltd.
 
 9/30/98                                                   5.63                  25,000,000                    25,000,306  
 
Banque Nationale de Paris 
 
 9/17/98                                                   5.60                  25,000,000                    25,000,381
 
Barclays Bank, PLC 
 
 9/24/98                                                   5.60                  10,000,000                    10,000,000  
 
 10/6/98                                                   5.63                  100,000,000                   100,000,000 
 
 10/21/98                                                  5.60                  10,000,000                    10,000,000  
 
 10/28/98                                                  5.65                  30,000,000                    29,998,328  
 
Commerzbank AG 
 
 9/28/98                                                   5.55                  15,000,000                    15,000,000  
 
Deutsche Bank AG 
 
 9/28/98                                                   5.55                  120,000,000                   120,000,000 
 
Halifax, PLC 
 
 10/23/98                                                  5.58                  50,000,000                    50,000,000  
 
National Australia Bank Ltd.
 
 9/16/98                                                   5.60                  25,000,000                    24,999,729 
 
Norddeutsche Landesbank Girozentrale
 
 9/8/98                                                    5.57                  8,000,000                     8,000,000 
 
 10/13/98                                                  5.57                  15,000,000                    14,999,790 
 
RaboBank Nederland, Coop. Central 
 
 9/9/98                                                    5.61                  25,000,000                    25,000,000 
 
 
 
Toronto-Dominion Bank
 
 10/14/98                                                  5.93%                $ 25,000,000                  $ 25,000,000 
 
 2/11/99                                                   5.60                  50,000,000                    50,006,219 
 
Westdeutsche Landesbank Girozentrale 
 
 10/20/98                                                  5.58                  35,000,000                    35,000,000 
 
                                                                                                                643,004,753
 
NEW YORK BRANCH, YANKEE DOLLAR, FOREIGN BANKS - 20.8% 
 
ABN-AMRO Bank NV 
 
 3/12/99                                                   5.72                  10,000,000                    9,991,944  
 
Banque Nationale de Paris
 
 10/26/98                                                  5.59                  50,000,000                    50,000,377 
 
Bayerische Landesbank Girozentrale 
 
 12/1/98                                                   5.56                  25,000,000                    25,000,000 
 
Bayerische Vereinsbank AG 
 
 2/2/99                                                    5.59                  48,000,000                    48,002,746 
 
Canadian Imperial Bank of Commerce 
 
 9/9/98                                                    5.56                  35,000,000                    35,000,000 
 
 11/4/98                                                   5.55                  55,000,000                    55,000,000 
 
 12/1/98                                                   5.54                  45,000,000                    45,000,000 
 
 3/2/99                                                    5.70                  30,000,000                    29,990,680 
 
Commerzbank AG 
 
 9/10/98                                                   5.55                  100,000,000                   100,000,000
 
Credit Agricole Indosuez 
 
 10/21/98                                                  5.62                  50,000,000                    50,000,000 
 
 12/2/98                                                   5.48                  50,000,000                    50,000,000 
 
 2/26/99                                                   5.70                  15,000,000                    14,997,195 
 
Credit Communale de Belgique 
 
 11/2/98                                                   5.50                  15,000,000                    15,000,000 
 
 2/3/99                                                    5.64                  30,000,000                    30,000,000 
 
Deutsche Bank AG
 
 10/20/98                                                  5.63                  40,000,000                    40,001,385 
 
 10/20/98                                                  5.65                  30,000,000                    30,000,797 
 
 3/2/99                                                    5.70                  30,000,000                    29,992,831 
 
Dresdner Bank AG 
 
 9/8/98                                                    5.56                  34,000,000                    34,000,000 
 
 9/15/98                                                   5.55                  65,000,000                    65,000,000 
 
 9/16/98                                                   5.55                  55,000,000                    55,000,000 
 
 
National Bank of Canada  
 
 9/8/98                                                    5.56%                $ 15,000,000                  $ 14,999,915
 
National Westminster Bank, PLC
 
 9/9/98                                                    5.56                  65,000,000                    65,000,000 
 
 9/25/98                                                   5.88                  11,000,000                    10,999,372 
 
 2/26/99                                                   5.70                  25,000,000                    24,995,326 
 
 3/2/99                                                    5.70                  30,000,000                    29,992,831 
 
 6/7/99                                                    5.75                  50,000,000                    49,975,292 
 
Norddeutsche Landesbank Girozentrale
 
 10/21/98                                                  5.97                  45,000,000                    44,996,906 
 
RaboBank Nederland, Coop. Central 
 
 2/2/99                                                    5.54                  25,000,000                    24,995,863 
 
 2/2/99                                                    5.70                  30,000,000                    29,961,588 
 
 3/2/99                                                    5.50                  45,000,000                    45,000,000 
 
 6/1/99                                                    5.75                  25,000,000                    24,987,460 
 
Royal Bank of Canada 
 
 2/10/99                                                   5.60                  25,000,000                    24,992,548 
 
 2/26/99                                                   5.63                  40,000,000                    39,987,838 
 
 6/11/99                                                   5.80                  25,000,000                    24,987,007 
 
Royal Bank of Scotland, PLC 
 
 11/25/98                                                  5.58                  35,000,000                    35,000,000 
 
Societe Generale, France 
 
 10/28/98                                                  5.57                  90,000,000                    90,000,000 
 
Swiss Bank Corp.
 
 3/19/99                                                   5.70                  50,000,000                    49,981,710 
 
 3/24/99                                                   5.75                  50,000,000                    49,972,736 
 
 6/3/99                                                    5.75                  50,000,000                    49,978,346 
 
Toronto-Dominion Bank  
 
 12/2/98                                                   5.49                  40,000,000                    40,000,000 
 
 6/4/99                                                    5.75                  50,000,000                    49,974,645 
 
Westdeutsche Landesbank Girozentrale 
 
 9/8/98                                                    5.56                  17,000,000                    17,000,000 
 
 9/28/98                                                   5.55                  30,000,000                    30,000,000 
 
 2/4/99                                                    5.64                  35,000,000                    35,000,000 
 
                                                                                                            1,714,757,338 
TOTAL CERTIFICATES OF DEPOSIT                                                                               2,482,757,784 
 
 
 
COMMERCIAL PAPER - 47.9% 
 
 
ABN-AMRO North America, Inc. 
 
 10/5/98                                                   5.61%               $ 40,000,000                  $ 39,794,111 
 
AC Acquisition Holding Co. 
 
 10/16/98                                                  5.56                  20,000,000                    19,862,000  
 
American Express Credit Corp.
 
 9/15/98                                                   5.57                  25,000,000                    24,946,333  
 
American General Finance Corp. 
 
 9/22/98                                                   5.60                  10,000,000                    9,967,742    
 
Aspen Funding Corp. 
 
 9/17/98                                                   5.58                  10,000,000                    9,975,333    
 
 10/15/98                                                  5.58                  30,000,000                    29,797,233   
 
 11/23/98                                                  5.60                  20,000,000                    19,745,697   
 
Asset Securitization Coop. Corp.
 
 9/1/98                                                    5.61                  13,100,000                    13,100,000   
 
 9/1/98                                                    5.68                  20,000,000                    20,000,000   
 
 9/3/98                                                    5.61                  38,000,000                    37,988,283   
 
 9/22/98                                                   5.58                  30,000,000                    29,903,400   
 
 9/23/98                                                   5.57                  10,000,000                    9,966,144    
 
 10/27/98                                                  5.58                  72,000,000                    71,381,760   
 
 11/4/98                                                   5.60                  20,000,000                    19,803,733   
 
 12/8/98                                                   5.59                  20,000,000                    19,700,556   
 
 12/9/98                                                   5.59                  20,000,000                    19,697,500   
 
Associates Corp. of North America  
 
 9/8/98                                                    5.60                  15,000,000                    14,983,871   
 
 9/22/98                                                   5.60                  15,000,000                    14,951,875   
 
 10/20/98                                                  5.59                  23,000,000                    22,827,506   
 
 10/21/98                                                  5.59                  10,000,000                    9,923,472    
 
AVCO Financial Services, Inc.
 
 10/5/98                                                   5.59                  19,000,000                    18,900,588   
 
Barclays US Funding Corp.
 
 9/8/98                                                    5.55                  110,000,000                   109,881,826  
 
Bear Stearns Companies, Inc. 
 
 9/23/98                                                   5.57                  25,000,000                    24,915,819   
 
 9/23/98                                                   5.58                  25,000,000                    24,915,667   
 
BMW US Capital Corp. 
 
 9/1/98                                                    5.58                  15,000,000                    15,000,000   
 
 9/2/98                                                    5.58                  20,000,000                    19,996,922   
 
 11/10/98                                                  5.54                  33,359,000                    33,003,541   
 
 11/20/98                                                  5.55                  19,617,000                    19,378,109   
 
 
CIESCO L.P. 
 
 9/22/98                                                   5.55%                $ 20,000,000                  $ 19,935,600  
 
CIT Group, Inc. 
 
 9/8/98                                                    5.57                  15,000,000                    14,983,900   
 
 9/14/98                                                   5.57                  38,000,000                    37,924,253   
 
 9/15/98                                                   5.57                  30,000,000                    29,935,600   
 
Citibank Credit Card Master Trust I (Dakota Certificate Program) 
 
 9/10/98                                                   5.57                  20,000,000                    19,972,300   
 
 9/21/98                                                   5.58                  15,000,000                    14,953,917   
 
 10/6/98                                                   5.58                  25,000,000                    24,865,104   
 
 10/13/98                                                  5.58                  10,000,000                    9,935,483    
 
 10/20/98                                                  5.59                  25,000,000                    24,812,507   
 
 10/22/98                                                  5.60                  25,000,000                    24,804,146   
 
 10/27/98                                                  5.59                  5,000,000                     4,956,989    
 
 10/28/98                                                  5.58                  20,000,000                    19,825,200   
 
Commercial Credit Group, Inc. 
 
 10/14/98                                                  5.60                  10,000,000                    9,933,888    
 
Commonwealth Bank of Australia
 
 9/8/98                                                    5.55                  10,000,000                    9,989,267    
 
Den Danske Corp., Inc. 
 
 9/30/98                                                   5.60                  10,000,000                    9,955,775    
 
Deutsche Bank Financial, Inc.
 
 10/16/98                                                  5.57                  55,000,000                    54,620,500   
 
 11/12/98                                                  5.59                  80,000,000                    79,118,400   
 
Diageo Capital, PLC 
 
 9/28/98                                                   5.60                  15,000,000                    14,937,900   
 
 9/29/98                                                   5.60                  30,000,000                    29,871,667   
 
 11/30/98                                                  5.59                  9,500,000                     9,369,375    
 
du Pont (E.I.) de Nemours & Co.  
 
 9/9/98                                                    5.55                  5,000,000                     4,993,867    
 
Enterprise Funding Corp.
 
 9/1/98                                                    5.92                  20,000,000                    20,000,000   
 
 9/3/98                                                    5.58                  25,000,000                    24,992,319   
 
 9/16/98                                                   5.57                  30,140,000                    30,070,301   
 
 9/17/98                                                   5.56                  5,000,000                     4,987,689    
 
 9/23/98                                                   5.58                  14,651,000                    14,601,577   
 
 10/22/98                                                  5.58                  5,000,000                     4,960,829    
 
Finova Capital Corp. 
 
 10/28/98                                                  5.60                  15,000,000                    14,868,425   
 
 11/3/98                                                   5.63                  10,000,000                    9,902,875    
 
 
Fleet Funding Corp.
 
 10/15/98                                                  5.57%                $ 30,000,000                  $ 29,797,233  
 
Ford Motor Credit Co. 
 
 9/8/98                                                    5.55                  200,000,000                   199,785,334  
 
 9/17/98                                                   5.54                  70,000,000                    69,828,267   
 
 10/5/98                                                   5.57                  50,000,000                    49,739,333   
 
 11/10/98                                                  5.57                  30,000,000                    29,679,750   
 
 2/1/99                                                    5.61                  20,000,000                    19,535,900   
 
General Electric Capital Corp.
 
 9/10/98                                                   5.61                  15,000,000                    14,979,338   
 
 9/17/98                                                   5.57                  40,000,000                    39,901,867   
 
 9/21/98                                                   5.55                  35,000,000                    34,892,667   
 
 10/8/98                                                   5.63                  75,000,000                    74,575,271   
 
 10/14/98                                                  5.60                  50,000,000                    49,669,139   
 
 10/20/98                                                  5.62                  5,000,000                     4,962,569    
 
 10/27/98                                                  5.59                  25,000,000                    24,785,333   
 
 11/24/98                                                  5.58                  20,000,000                    19,743,333   
 
 2/1/99                                                    5.62                  100,000,000                   97,675,250   
 
General Electric Capital Services, Inc.  
 
 9/17/98                                                   5.57                  25,000,000                    24,938,667   
 
General Electric Co. 
 
 9/24/98                                                   5.60                  30,000,000                    29,894,008   
 
General Motors Acceptance Corp. 
 
 9/23/98                                                   5.60                  40,000,000                    39,864,822   
 
 9/30/98                                                   5.63                  40,000,000                    39,822,778   
 
 10/29/98                                                  5.61                  55,000,000                    54,510,867   
 
 11/12/98                                                  5.62                  35,000,000                    34,613,600   
 
 1/26/99                                                   5.67                  35,000,000                    34,213,958   
 
General Motors Corp.
 
 9/10/98                                                   5.56                  25,000,000                    24,965,375   
 
 9/15/98                                                   5.59                  35,000,000                    34,924,458   
 
 9/16/98                                                   5.58                  5,000,000                     4,988,458    
 
 9/23/98                                                   5.56                  14,000,000                    13,952,688   
 
 9/23/98                                                   5.57                  10,000,000                    9,966,144    
 
GTE Corp. 
 
 9/3/98                                                    5.60                  15,000,000                    14,995,350   
 
 9/24/98                                                   5.60                  5,000,000                     4,982,207    
 
 10/6/98                                                   5.59                  20,000,000                    19,891,889   
 
 
Heller Financial, Inc. 
 
 9/16/98                                                   5.69%                $ 7,000,000                   $ 6,983,521   
 
 9/21/98                                                   5.70                  12,000,000                    11,962,333   
 
 9/23/98                                                   5.65                  5,000,000                     4,982,828    
 
 10/28/98                                                  5.70                  10,000,000                    9,911,017    
 
Household Finance Corp. 
 
 9/22/98                                                   5.56                  40,000,000                    39,870,967   
 
Kitty Hawk Funding Corp.
 
 10/7/98                                                   5.58                  25,069,000                    24,930,118   
 
 11/30/98                                                  5.59                  10,000,000                    9,862,250    
 
Lehman Brothers Holdings, Inc. 
 
 9/8/98                                                    5.59                  25,000,000                    24,972,924   
 
 10/15/98                                                  5.61                  25,000,000                    24,830,417   
 
Merrill Lynch & Co., Inc. 
 
 10/14/98                                                  5.65                  50,000,000                    49,670,333   
 
 11/18/98                                                  5.60                  35,000,000                    34,582,429   
 
 11/30/98                                                  5.65                  20,000,000                    19,724,000   
 
 11/30/98                                                  5.66                  100,000,000                   98,625,000   
 
Monsanto Co. 
 
 11/3/98                                                   5.60                  15,000,000                    14,855,100   
 
Morgan Stanley, Dean Witter, Discover and Co. 
 
 9/15/98                                                   5.60 (b)              25,000,000                    25,000,000   
 
 10/8/98                                                   5.60                  30,000,000                    29,829,800   
 
NationsBank Corp.  
 
 11/16/98                                                  5.60                  10,000,000                    9,883,678    
 
Nationwide Building Society 
 
 10/5/98                                                   5.61                  10,000,000                    9,948,056    
 
 10/26/98                                                  5.61                  90,000,000                    89,245,583   
 
 11/2/98                                                   5.63                  20,000,000                    19,810,556   
 
New Center Asset Trust  
 
 9/21/98                                                   5.56                  30,000,000                    29,907,833   
 
 9/21/98                                                   5.61                  45,000,000                    44,861,750   
 
 9/22/98                                                   5.62                  40,000,000                    39,870,733   
 
 9/30/98                                                   5.64                  35,000,000                    34,844,649   
 
Norfolk Southern Corp. 
 
 9/9/98                                                    5.73                  9,000,000                     8,988,600    
 
 9/14/98                                                   5.72                  10,000,000                    9,979,417    
 
 9/14/98                                                   5.73                  2,000,000                     1,995,883    
 
 10/14/98                                                  5.74                  2,000,000                     1,986,383    
 
 10/14/98                                                  5.75                  5,000,000                     4,965,958    
 
 10/19/98                                                  5.75                  4,000,000                     3,969,600    
 
 
Preferred Receivables Funding Corp.
 
 9/3/98                                                    5.57%                $ 65,450,000                  $ 65,429,856  
 
 9/8/98                                                    5.60                  20,000,000                    19,978,533   
 
 9/16/98                                                   5.56                  26,425,000                    26,364,112   
 
 9/22/98                                                   5.58                  17,100,000                    17,044,639   
 
 9/24/98                                                   5.56                  10,000,000                    9,964,669    
 
 10/8/98                                                   5.59                  50,000,000                    49,715,819   
 
 10/14/98                                                  5.57                  50,000,000                    49,670,333   
 
 10/19/98                                                  5.58                  20,000,000                    19,852,800   
 
 10/20/98                                                  5.58                  10,000,000                    9,924,731    
 
Royal Bank of Canada  
 
 9/25/98                                                   5.56                  25,000,000                    24,908,000   
 
 9/25/98                                                   5.57                  30,000,000                    29,889,400   
 
Salomon Smith Barney 
 
 10/19/98                                                  5.58                  10,000,000                    9,926,133    
 
 11/3/98                                                   5.60                  10,000,000                    9,903,225    
 
Sears Roebuck Acceptance Corp. 
 
 9/16/98                                                   5.58                  50,000,000                    49,884,792   
 
 9/17/98                                                   5.58                  50,000,000                    49,877,111   
 
 10/14/98                                                  5.59                  10,000,000                    9,933,828    
 
 2/25/99                                                   5.55                  15,000,000                    14,601,750   
 
Societe Generale North America, Inc. 
 
 9/15/98                                                   5.58                  30,000,000                    29,935,483   
 
Textron, Inc.
 
 9/1/98                                                    5.72                  10,000,000                    10,000,000   
 
 9/9/98                                                    5.73                  6,953,000                     6,944,193    
 
Three Rivers Funding Corp. 
 
 9/2/98                                                    5.57                  24,543,000                    24,539,216   
 
 9/3/98                                                    5.57                  10,000,000                    9,996,917    
 
 9/10/98                                                   5.58                  10,000,000                    9,986,125    
 
 9/15/98                                                   5.58                  14,341,000                    14,309,992   
 
Transamerica Finance Corp.
 
 9/10/98                                                   5.55                  20,000,000                    19,972,400   
 
Triple A One Funding Corp.
 
 9/9/98                                                    5.58                  10,120,000                    10,107,519   
 
 9/15/98                                                   5.58                  10,000,000                    9,978,456    
 
 9/17/98                                                   5.57                  10,000,000                    9,975,378    
 
 9/17/98                                                   5.58                  5,099,000                     5,086,422    
 
 10/7/98                                                   5.59                  10,000,000                    9,944,600    
 
 10/8/98                                                   5.58                  15,000,000                    14,914,746   
 
 10/19/98                                                  5.58                  15,175,000                    15,063,110   
 
 
UBS Finance (Delaware), Inc. 
 
 9/14/98                                                   5.54%                $ 19,500,000                  $ 19,461,165  
 
Unifunding, Inc.
 
 12/16/98                                                  5.65                  15,000,000                    14,757,525   
 
Vereinsbank Finance (Del.), Inc.
 
 9/2/98                                                    5.60                  40,000,000                    39,993,789   
 
TOTAL COMMERCIAL PAPER                                                                                      3,947,153,010   
 
</TABLE>
 
 
<TABLE>
<CAPTION>
<S>                                          <C>           <C>           <C>           <C>           
BANK NOTES - 6.1%                                                                                    
 
                                                                                                     
 
Abbey National Treasury Services, PLC                                                                
 
 11/17/98                                     5.54 (a)(b)   40,000,000                  39,966,630   
 
CoreStates Bank, NA, Philadelphia                                                                    
 
 9/14/98                                      5.61 (b)      10,000,000                  10,000,000   
 
First National Bank of Chicago                                                                       
 
 9/2/98                                       5.56          34,000,000                  34,000,005   
 
First Union National Bank of North Carolina                                                          
 
 9/1/98                                       5.65 (b)      35,000,000                  34,997,575   
 
 9/1/98                                       5.66 (b)      60,000,000                  60,000,000   
 
 3/1/99                                       5.50          100,000,000                 100,000,000  
 
Key Bank, NA                                                                                         
 
 9/1/98                                       5.62 (b)      15,000,000                  14,996,927   
 
 9/21/98                                      5.52 (b)      30,000,000                  29,980,089   
 
 9/23/98                                      5.52 (b)      10,000,000                  9,999,526    
 
LaSalle National Bank, Chicago                                                                       
 
 9/16/98                                      5.57          10,000,000                  10,000,000   
 
National City Bank, Kentucky                                                                         
 
 9/7/98                                       5.55 (b)      25,000,000                  24,993,691   
 
PNC Bank, NA                                                                                         
 
 9/1/98                                       5.54 (b)      40,000,000                  39,973,436   
 
 10/16/98                                     5.58 (b)      40,000,000                  39,991,168   
 
SouthTrust Bank, Alabama                                                                             
 
 9/11/98                                      5.55 (b)      11,000,000                  10,999,825   
 
US Bank, NA                                                                                          
 
 9/16/98                                      5.53 (b)      11,000,000                  10,999,667   
 
Westpac Banking Corp.                                                                                
 
 5/5/99                                       5.85          35,000,000                  34,988,677   
 
TOTAL BANK NOTES                                                                       505,887,216                
 
</TABLE>
 
 
<TABLE>
<CAPTION>
<S>                             <C>                   <C>            <C>           <C>            
MASTER NOTES - 2.7%                                                                               
 
DUE                             ANNUALIZED YIELD AT   PRINCIPAL                    VALUE          
DATE                            TIME OF PURCHASE      AMOUNT                       (NOTE 1)       
 
Goldman Sachs Group L.P. (The)                                                                    
 
 9/13/98                         5.69% (b)(d)         $ 110,000,000                $ 110,000,000  
 
 11/4/98                         5.69 (b)              11,000,000                   11,000,000    
 
J.P. Morgan Securities, Inc.                                                                      
 
 9/8/98                          5.63 (b)              25,000,000                   25,000,000    
 
 9/8/98                          5.63 (b)              67,000,000                   67,000,000    
 
SunTrust Banks, Inc.                                                                              
 
 9/4/98                          5.60 (b)              10,000,000                   10,000,000    
 
TOTAL MASTER NOTES                                                                 223,000,000                 
 
</TABLE>
 
 
<TABLE>
<CAPTION>
<S>                                            <C>           <C>          <C>           <C>          
MEDIUM-TERM NOTES - 1.4%                                                                             
 
                                                                                                     
 
Merrill Lynch & Co., Inc.                                                                            
 
 9/1/98                                         5.63 (b)      26,000,000                 25,999,764  
 
 9/4/98                                         5.62 (b)      25,000,000                 24,996,291  
 
Morgan Stanley, Dean Witter, Discover & Co.                                                          
 
 9/1/98                                         5.75 (b)      35,000,000                 35,000,000  
 
Norwest Corp.                                                                                        
 
 10/22/98                                       5.71 (b)      31,000,000                 31,000,000  
 
TOTAL MEDIUM-TERM NOTES                                                                 116,996,055               
 
SHORT-TERM NOTES - 6.3%                                                                              
 
                                                                                                     
 
Capital One Funding Corp. (1994-C)                                                                   
 
 9/8/98                                         5.61 (b)      6,097,000                  6,097,000   
 
Capital One Funding Corp. (1994-E)                                                                   
 
 9/8/98                                         5.61 (b)      5,952,000                  5,952,000   
 
Capital One Funding Corp. (1995-D)                                                                   
 
 9/8/98                                         5.61 (b)      10,970,000                 10,970,000  
 
Capital One Funding Corp. (1995-E)                                                                   
 
 9/8/98                                         5.61 (b)      9,808,000                  9,808,000   
 
Capital One Funding Corp. (1995-F)                                                                   
 
 9/8/98                                         5.61 (b)      2,900,000                  2,900,000   
 
Liquid Asset Backed Securities Trust (1996-1)                                                        
 
 9/15/98                                        5.63 (a)(b)   28,000,000                 28,000,000  
 
Liquid Asset Backed Securities Trust (1996-2)                                                        
 
 9/1/98                                         5.64 (a)(b)   35,000,000                 35,000,000  
 
Liquid Asset Backed Securities Trust (1997-5)                                                        
 
 9/17/98                                        5.63 (a)(b)   57,000,000                 57,000,000  
 
 
 
New York Life Insurance Co.                                                                                
 
 9/23/98                                        5.68% (b)   $ 30,000,000                $ 30,000,000  
 
 11/28/98                                       5.64 (b)      25,000,000                  25,000,000   
 
Pacific Life Insurance Co.                                                                                 
 
 9/9/98                                         5.73 (a)(b)   25,000,000                  25,000,000   
 
 12/9/98                                        5.73(a)(b)(c) 25,000,000                  25,000,000   
 
Peoples Security Life Insurance Co.                                                                        
 
 9/1/98                                         5.80 (b)(d)   10,000,000                  10,000,000   
 
SMM Trust (1997-P)                                                                                         
 
 9/16/98                                        5.65 (a)(b)   20,000,000                  20,000,000   
 
SMM Trust (1997-X)                                                                                         
 
 9/14/98                                        5.65 (a)(b)   53,000,000                  53,000,000   
 
SMM Trust (1998-I)                                                                                         
 
 9/28/98                                        5.65 (a)(b)   16,000,000                  16,000,000   
 
Strategic Money Market Trust (1997-A)                                                                      
 
 9/23/98                                        5.69 (a)(b)   82,000,000                  82,000,000   
 
Strategic Money Market Trust (1998-B)                                                                      
 
 9/7/98                                         5.66 (a)(b)   50,000,000                  50,000,000   
 
Transamerica Life Insurance & Annuity Co.                                                                  
 
 9/8/98                                         5.70 (b)      16,000,000                  16,000,000   
 
 9/15/98                                        5.67 (a)(b)   10,000,000                  10,000,000   
 
TOTAL SHORT-TERM NOTES                                                                   517,727,000                
 
</TABLE>
 
TIME DEPOSITS - 1.1%                                                     
 
                                                                         
 
RaboBank Nederland, Coop. Central                                        
 
 9/1/98                             5.88   90,000,000        90,000,000  
 
 
<TABLE>
<CAPTION>
<S>                                           <C>              <C>              <C>           
REPURCHASE AGREEMENTS - 4.3%                                                                  
 
                                              MATURITY AMOUNT                                 
 
In a joint trading account (U.S. Government                                                   
Obligations) dated:                                                                           
 
8/26/98 due 9/2/98 At 5.60%                   $ 250,272,222                      250,000,000  
 
8/31/98 due 9/1/98 At 5.86%                    101,344,483                       101,328,000  
 
TOTAL REPURCHASE AGREEMENTS                                                      351,328,000                   
 
TOTAL INVESTMENTS - 100%                                                     $ 8,234,849,065                
 
</TABLE>
 
Total Cost for Income Tax Purposes  $ 8,234,849,065
LEGEND
(a) Security exempt from registration under Rule 144A of the
Securities Act of 1933.  These securities may be resold in
transactions exempt from registration, normally to qualified
institutional buyers. At the period end, the value of these securities
amounted to $440,966,630 or 5.6% of net assets.
(b) The coupon rate shown on floating or adjustable rate securities
represents the rate at period end. The due dates on these types of
securities reflects the next interest rate reset date or, when
applicable, the final maturity date.
(c) Security purchased on a delayed delivery or when-issued basis.
Interest rate to be determined at settlement date (see Note 2 of Notes
to Financial Statements).
(d) Restricted securities - Investment in securities not registered
under the Securities Act of 1933 (see Note 2 of Notes to Financial
Statements).
SECURITY             ACQUISTION   ACQUISITION   
                     DATE         COST          
 
Goldman Sachs        3/10/98       110,000,000  
Group LP (The)                                  
5.69% 9/13/98                                   
 
Peoples Security     7/31/98        10,000,000  
Life Insurance Co.                              
5.80% 9/1/98                                    
 
INCOME TAX INFORMATION
At August 31, 1998, the fund had a capital loss carryforward of
approximately $395,000 of which $279,000, $42,000, $73,000 and $1,000
will expire on August 31, 2002, 2004, 2005 and 2006, respectively.
FINANCIAL STATEMENTS
 
 
 
<TABLE>
<CAPTION>
<S>                                                        <C>           <C>              
STATEMENT OF ASSETS AND LIABILITIES
                                                                         AUGUST 31, 1998  
 
ASSETS                                                                                    
 
INVESTMENT IN SECURITIES, AT VALUE (INCLUDING                            $ 8,234,849,065  
REPURCHASE AGREEMENTS OF $351,328,000) -                                                  
SEE ACCOMPANYING SCHEDULE                                                                 
 
RECEIVABLE FOR FUND SHARES SOLD                                           195,266,654     
 
INTEREST RECEIVABLE                                                       44,121,105      
 
OTHER RECEIVABLES                                                         1,981           
 
 TOTAL ASSETS                                                             8,474,238,805   
 
LIABILITIES                                                                               
 
PAYABLE TO CUSTODIAN BANK                                  $ 7,396                        
 
PAYABLE FOR INVESTMENTS PURCHASED                           481,795,022                   
REGULAR DELIVERY                                                                          
 
 DELAYED DELIVERY                                           25,000,000                    
 
PAYABLE FOR FUND SHARES REDEEMED                            43,108,126                    
 
DISTRIBUTIONS PAYABLE                                       84,450                        
 
ACCRUED MANAGEMENT FEE                                      2,649,738                     
 
OTHER PAYABLES AND ACCRUED EXPENSES                         50,318                        
 
 TOTAL LIABILITIES                                                        552,695,050     
 
NET ASSETS                                                               $ 7,921,543,755  
 
NET ASSETS CONSIST OF:                                                                    
 
PAID IN CAPITAL                                                          $ 7,921,972,481  
 
ACCUMULATED NET REALIZED GAIN (LOSS) ON INVESTMENTS                       (428,726)       
 
NET ASSETS, FOR 7,921,900,471 SHARES OUTSTANDING                         $ 7,921,543,755  
 
NET ASSET VALUE, OFFERING PRICE AND REDEMPTION PRICE PER                  $1.00           
SHARE ($7,921,543,755 (DIVIDED BY) 7,921,900,471 SHARES)                                  
 
</TABLE>
 
 
<TABLE>
<CAPTION>
<S>                                                    <C>           <C>            
STATEMENT OF OPERATIONS
                                                        YEAR ENDED AUGUST 31, 1998 
 
INTEREST INCOME                                                      $ 381,051,939  
 
EXPENSES                                                                            
 
MANAGEMENT FEE                                         $ 27,958,963                 
 
NON-INTERESTED TRUSTEES' COMPENSATION                   25,751                      
 
 TOTAL EXPENSES BEFORE REDUCTIONS                       27,984,714                  
 
 EXPENSE REDUCTIONS                                     (2,225,308)   25,759,406    
 
NET INTEREST INCOME                                                   355,292,533   
 
NET REALIZED GAIN (LOSS) ON INVESTMENTS                               (34,936)      
 
NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS                 $ 355,257,597  
 
</TABLE>
 
 
<TABLE>
<CAPTION>
<S>                                                       <C>                <C>               
STATEMENT OF CHANGES IN NET ASSETS
                                                          YEAR ENDED         YEAR ENDED        
                                                          AUGUST 31,         AUGUST 31,        
                                                          1998               1997              
 
INCREASE (DECREASE) IN NET ASSETS                                                              
 
OPERATIONS                                                $ 355,292,533      $ 309,818,664     
NET INTEREST INCOME                                                                            
 
 NET REALIZED GAIN (LOSS)                                  (34,936)           (73,225)         
 
 NET INCREASE (DECREASE) IN NET ASSETS RESULTING           355,257,597        309,745,439      
FROM OPERATIONS                                                                                
 
DISTRIBUTIONS TO SHAREHOLDERS FROM NET INTEREST INCOME     (355,292,533)      (309,818,664)    
 
SHARE TRANSACTIONS AT NET ASSET VALUE OF $1.00 PER SHARE   11,617,803,340     7,484,258,226    
PROCEEDS FROM SALES OF SHARES                                                                  
 
 REINVESTMENT OF DISTRIBUTIONS FROM NET INTEREST INCOME    354,492,137        309,818,664      
 
 COST OF SHARES REDEEMED                                   (10,277,557,678)   (6,894,419,990)  
 
 NET INCREASE (DECREASE) IN NET ASSETS AND SHARES          1,694,737,799      899,656,900      
RESULTING FROM SHARE TRANSACTIONS                                                              
 
  TOTAL INCREASE (DECREASE) IN NET ASSETS                  1,694,702,863      899,583,675      
 
NET ASSETS                                                                                     
 
 BEGINNING OF PERIOD                                       6,226,840,892      5,327,257,217    
 
 END OF PERIOD                                            $ 7,921,543,755    $ 6,226,840,892   
 
</TABLE>
 
 
<TABLE>
<CAPTION>
<S>                                <C>                     <C>      <C>      <C>      <C>      
FINANCIAL HIGHLIGHTS
                                   YEARS ENDED AUGUST 31,                                      
 
                                   1998                    1997     1996     1995     1994     
 
SELECTED PER-SHARE DATA                                                                        
 
NET ASSET VALUE,                   $ 1.000                 $ 1.000  $ 1.000  $ 1.000  $ 1.000  
BEGINNING OF PERIOD                                                                            
 
INCOME FROM INVESTMENT OPERATIONS   .053                    .052     .053     .054     .034    
NET INTEREST INCOME                                                                            
 
LESS DISTRIBUTIONS                                                                             
 
 FROM NET INTEREST INCOME           (.053)                  (.052)   (.053)   (.054)   (.034)  
 
NET ASSET VALUE, END OF PERIOD     $ 1.000                 $ 1.000  $ 1.000  $ 1.000  $ 1.000  
 
TOTAL RETURN A                      5.46%                   5.37%    5.40%    5.57%    3.41%   
 
RATIOS AND SUPPLEMENTAL DATA                                                                   
 
NET ASSETS, END OF PERIOD          $ 7,922                 $ 6,227  $ 5,327  $ 4,350  $ 2,800  
(IN MILLIONS)                                                                                  
 
RATIO OF EXPENSES TO AVERAGE        .42%                    .42%     .37% B   .42%     .42%    
NET ASSETS                                                                                     
 
RATIO OF EXPENSES TO AVERAGE NET    .39% C                  .39% C   .34% C   .42%     .42%    
ASSETS AFTER EXPENSE REDUCTIONS                                                                
 
RATIO OF NET INTEREST INCOME        5.33%                   5.21%    5.31%    5.49%    3.44%   
TO AVERAGE NET ASSETS                                                                          
 
</TABLE>
 
D THE TOTAL RETURNS WOULD HAVE BEEN LOWER HAD CERTAIN EXPENSES NOT
BEEN REDUCED DURING THE PERIODS SHOWN (SEE NOTE 4 OF NOTES TO
FINANCIAL STATEMENTS).
E FMR AGREED TO REIMBURSE A PORTION OF THE FUND'S EXPENSES DURING THE
PERIOD. WITHOUT THIS REIMBURSEMENT, THE FUND'S EXPENSE RATIO WOULD
HAVE BEEN HIGHER.
F FMR OR THE FUND HAS ENTERED INTO VARYING ARRANGEMENTS WITH THIRD
PARTIES WHO EITHER PAID OR REDUCED A PORTION OF THE FUND'S EXPENSES
(SEE NOTE 4 OF NOTES TO FINANCIAL STATEMENTS).
NOTES TO FINANCIAL STATEMENTS
For the period ended August 31, 1998
 
 
1. SIGNIFICANT ACCOUNTING POLICIES.
Retirement Money Market Portfolio (the fund) is a fund of Fidelity
Money Market Trust (the trust) and is authorized to issue an unlimited
number of shares. The trust is registered under the Investment Company
Act of 1940, as amended (the 1940 Act), as an open-end management
investment company organized as a Delaware business trust. The
financial statements have been prepared in conformity with generally
accepted accounting principles which require management to make
certain estimates and assumptions at the date of the financial
statements. The following summarizes the significant accounting
policies of the fund:
SECURITY VALUATION. As permitted under Rule 2a-7 of the 1940 Act, and
certain conditions therein, securities are valued initially at cost
and thereafter assume a constant amortization to maturity of any
discount or premium.
INCOME TAXES. As a qualified regulated investment company under
Subchapter M of the Internal Revenue Code, the fund is not subject to
income taxes to the extent that it distributes substantially all of
its taxable income for its fiscal year. The schedule of investments
includes information regarding income taxes under the caption "Income
Tax Information."
INTEREST INCOME. Interest income, which includes amortization of
premium and accretion of discount, is accrued as earned. 
EXPENSES. Most expenses of the trust can be directly attributed to a
fund. Expenses which cannot be directly attributed are apportioned
among the funds in the trust.
DEFERRED TRUSTEE COMPENSATION. Under a Deferred Compensation Plan (the
Plan) non-interested Trustees must defer receipt of a portion of, and
may elect to defer receipt of an additional portion of, their annual
compensation. Deferred amounts are treated as though equivalent dollar
amounts had been invested in shares of the fund or are invested in a
cross-section of other Fidelity money market funds. Deferred amounts
remain in the fund until distributed in accordance with the Plan.
DISTRIBUTIONS TO SHAREHOLDERS. Dividends are declared daily and paid
monthly from net interest income.
SECURITY TRANSACTIONS. Security transactions are accounted for as of
trade date. Gains and losses on securities sold are determined on the
basis of identified cost.
2. OPERATING POLICIES.
JOINT TRADING ACCOUNT. Pursuant to an Exemptive Order issued by the
Securities and Exchange Commission, the fund, along with other
affiliated entities of Fidelity Management & Research Company (FMR),
may transfer uninvested cash balances into one or more joint trading
accounts. These balances are invested in one or more repurchase
agreements for U.S. Treasury or Federal Agency obligations.
2. OPERATING POLICIES - 
CONTINUED
REPURCHASE AGREEMENTS. The underlying U.S. Treasury or Federal Agency
securities are transferred to an account of the fund, or to the Joint
Trading Account, at a bank custodian. The securities are
marked-to-market daily and maintained at a value at least equal to the
principal amount of the repurchase agreement (including accrued
interest). FMR, the fund's investment adviser, is responsible for
determining that the value of the underlying securities remains in
accordance with the market value requirements stated above. 
WHEN-ISSUED SECURITIES. The fund may purchase or sell securities on a
when-issued basis. Payment and delivery may take place a month or more
after the date of the transaction. The price of the underlying
securities is fixed at the time the transaction is negotiated. The
market values of the securities purchased on a when-issued or forward
commitment basis are identified as such in the fund's schedule of
investments. The fund may receive compensation for interest forgone in
the purchase of a when-issued security. The payables and receivables
associated with the purchases and sales of when-issued securities
having the same settlement date and broker are offset. When-issued
securities that have been purchased from and sold to different brokers
are reflected as both payables and receivables in the statement of
assets and liabilities under the caption "Delayed delivery." Losses
may arise due 
to changes in the market value of the underlying securities, if the
counterparty does not perform under the contract, or if the issuer
does not issue the securities due to political, economic, or other
factors.
RESTRICTED SECURITIES. The fund is permitted to invest in securities
that are subject to legal or contractual restrictions on resale. These
securities generally may be resold in transactions exempt from
registration or to the public if the securities are registered.
Disposal of these securities may involve time-consuming negotiations
and expense, and prompt sale at an acceptable price may be difficult.
At the end of the period, restricted securities (excluding 144A
issues) amounted to $120,000,000 or 1.5% of net assets.
3. FEES AND OTHER TRANSACTIONS WITH AFFILIATES. 
MANAGEMENT FEE. As the fund's investment adviser, FMR pays all
expenses, except the compensation of the non-interested Trustees and
certain exceptions such as interest, taxes, brokerage commissions and
extraordinary expenses. FMR receives a fee that is computed daily at
an annual rate of .42% of the fund's average net assets.
SUB-ADVISER FEE. As the fund's investment sub-adviser, Fidelity
Investments Money Management, Inc., a wholly owned subsidiary of FMR,
receives a fee from FMR of 50% of the management fee payable to FMR.
The fee is paid prior to any voluntary expense reimbursements which
may be in effect.
4. EXPENSE REDUCTIONS.
FMR has entered into  arrangements on behalf of the fund with the
fund's custodian and transfer agent whereby credits realized as a
result of uninvested cash balances were used to reduce a portion of
the fund's expenses. During the period, the fund's expenses were
reduced by $2,225,308 under these arrangements.
REPORT OF INDEPENDENT ACCOUNTANTS
 
 
To the Trustees of Fidelity Money Market Trust and the Shareholders of
Retirement Money Market Portfolio:
In our opinion, the accompanying statement of assets and liabilities,
including the schedule of investments, and the related statements of
operations and of changes in net assets and the financial highlights
present fairly, in all material respects, the financial position of
Retirement Money Market Portfolio (a fund of Fidelity Money Market
Trust) at August 31, 1998, and the results of its operations, the
changes in its net assets and the financial highlights for the periods
indicated, in conformity with generally accepted accounting
principles. These financial statements and financial highlights
(hereafter referred to as "financial statements") are the
responsibility of the Retirement Money Market Portfolio's management;
our responsibility is to express an opinion on these financial
statements based on our audits. We conducted our audits of these
financial statements in accordance with generally accepted auditing
standards which require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free
of material misstatement. An audit includes examining, on a test
basis, evidence supporting the amounts and disclosures in the
financial statements, assessing the accounting principles used and
significant estimates made by management, and evaluating the overall
financial statement presentation. We believe that our audits, which
included 
confirmation of securities at August 31, 1998 by correspondence with
the custodian and brokers, provide a reasonable basis for the opinion
expressed above.
/s/PricewaterhouseCoopers LLP
PricewaterhouseCoopers LLP
Boston, Massachusetts
October 6, 1998
DISTRIBUTIONS
 
 
A total of 0.09% of the dividends distributed during the fiscal year
was derived from interest on U.S. Government securities which is
generally exempt from state income tax.
The fund will notify shareholders in January 1999 of the applicable
percentage for use in preparing 1998 income tax returns.
 
 
 
 
 
 
 
INVESTMENT ADVISER
Fidelity Management & 
 Research Company
Boston, MA
SUB-ADVISER
Fidelity Investments Money 
 Management, Inc.
Merrimack, NH
OFFICERS
Edward C. Johnson 3d, PRESIDENT
Robert C. Pozen, SENIOR VICE PRESIDENT
Fred L. Henning, Jr., VICE PRESIDENT
Boyce I. Greer, VICE PRESIDENT
Robert K. Duby, VICE PRESIDENT
Eric D. Roiter, SECRETARY
Richard A. Silver, TREASURER
Stanley N. Griffith, 
 ASSISTANT VICE PRESIDENT
John H. Costello, ASSISTANT TREASURER
Leonard M. Rush, ASSISTANT TREASURER
Thomas J. Simpson, ASSISTANT TREASURER
BOARD OF TRUSTEES
Ralph F. Cox *
Phyllis Burke Davis *
Robert M. Gates *
Edward C. Johnson 3d
E. Bradley Jones *
Donald J. Kirk *
Peter S. Lynch
Marvin L. Mann *
William O. McCoy *
Gerald C. McDonough *
Robert C. Pozen
Thomas R. Williams *
ADVISORY BOARD
J. Gary Burkhead
* INDEPENDENT TRUSTEES
GENERAL DISTRIBUTOR
Fidelity Distributors Corporation
Boston, MA
TRANSFER AND SHAREHOLDER
SERVICING AGENT
Fidelity Investments Institutional 
 Operations Company, Inc.
Boston, MA
CUSTODIAN
The Bank of New York
New York, NY
(registered trademark)



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