DREYFUS NEW YORK TAX EXEMPT MONEY MARKET FUND/NY
N-30D, 1999-01-29
Previous: DREYFUS NEW YORK TAX EXEMPT INTERMEDIATE BOND FUND, N-30D, 1999-01-29
Next: DREYFUS NEW YORK TAX EXEMPT MONEY MARKET FUND/NY, NSAR-A, 1999-01-29



YEAR 2000 ISSUES (UNAUDITED)

  The  fund  could  be  adversely  affected  if the computer systems used by The
Dreyfus  Corporation  and  the  fund' s  other service providers do not properly
process  and  calculate date-related information from and after January 1, 2000.
The  Dreyfus  Corporation  is working to avoid Year 2000-related problems in its
systems  and  to  obtain  assurances  from other service providers that they are
taking  similar  steps.  In  addition,  issuers  of securities in which the fund
invests may be adversely affected by Year 2000-related problems. This could have
an impact on the value of the fund's investments and its share price.

DREYFUS NEW YORK TAX EXEMPT MONEY MARKET FUND
- -----------------------------------------------------------------------------

LETTER TO SHAREHOLDERS

Dear Shareholder:

We are pleased to provide you with this report for Dreyfus New York Tax Exempt
Money  Market  Fund  for the six-month period ended November 30, 1998. Your Fund
produced  an annualized yield of 2.66% and, after taking into account the effect
of compounding, the annualized effective yield was 2.69%.*

ECONOMY

  During  1998,  the  main  regions  of  the  world  had very different economic
fundamentals.  The  U.S.  began  the  period  with  a  strong  economy near full
employment, with unemployment only slightly above 4%. The tight labor market led
the  Federal  Reserve Board to contemplate a rise in interest rates early in the
year.  The  U.S.  economy  cooled enough over the months that the Fed decided to
stand  pat.  Evidence  of  economic  cooling continued to accumulate and worries
about  the  world economy intensified. Financial stresses pushed the Fed to ease
beginning  in September. After many years of subpar economic growth, continental
Europe  moved  into a sustained economic expansion. The overall European economy
benefited  as  interest  rates  in  peripheral countries such as Spain and Italy
fell,  approaching  the  lower  levels  established  by  Germany,  on the eve of
currency unification. Unlike the U.S., Europe has substantial excess capacity of
productive  plants and labor. In Asia, weak economies were pervasive as a result
of  the  Asian  financial  crisis.  The Latin American economies weakened as the
financial stresses spread throughout that region.

  A  main  influence  on  the  U.S.  economy this year was the foreign financial
crisis  and cooling of the world economy. The positive effects hit first. Actual
inflation  and  expected  inflation  dropped,  causing  a  decline  in long-term
Treasury bond yields and mortgage rates. This caused a boom in housing. The drop
in inflation helped the consumer sector as more of the growth in consumer income
was  left  over  after  inflation to buy goods and services. Consumers benefited
from a combination of good growth in real income, a strong labor market and past
increases in the prices of assets they owned.

  The  negative  effect of Asian weakness was felt in the industrial sector more
than  the  consumer  sector.  Corporate  profits weakened, especially in sectors
affected  by  the Asian crisis such as world-traded commodities (oil, metals and
paper) and exports. One result of the industrial weakness was to cool off a U.S.
economy    that    had    been    growing    rapidly.

  The  major  change  in  the  economic  outlook  over  recent months has been a
downward  shift  in  expectations  for  world  economic  growth. A credit crunch
developed in emerging countries and former communist countries, sharply reducing
the  economic  outlook  for  Asia  and  Latin  America  as well as for commodity
exporting  countries throughout the world. The effect on Europe and the U.S. has
been to lower expectations of profit growth and drive down bond yields. Monetary
policy has begun to ease in both the U.S. and Europe.

  Evidence  of  a  weaker  world  economy  accumulated as the financial stresses
continued.  A  worsened financial crisis occurred between the Russian default in
mid-August  and  the  fallout  from  the Long-Term Capital Management hedge fund
crisis  through  early October. However, proactive steps were taken to stabilize
the  Japanese  banks,  design  a  support  package  for Brazil and ease monetary
policy.  There  appears to be a shift in the priorities of key policymakers from
fighting potential inflation to restimulating future world economic growth.

MARKET ENVIRONMENT/PORTFOLIO OVERVIEW

  The  manner in which the Federal Reserve eased this past quarter was a gradual
process.  For  three  successive months, beginning in September, the Fed reduced
the  target  rate for Fed Funds a total of 75 basis points. The Fed also lowered
the  Discount  Rate by 25 basis points each, in November and December. The Fed's
actions provided even greater strength to an already strong short-term municipal
money  market.  Prior to these rate cuts, the short-term market had already felt
the  effects  of  the diminished supply of eligible new issuance over the summer
months.  This  year' s  summer calendar of municipal notes (consisting mainly of
California  paper)  was  drastically reduced by a combination of factors. Due to
the strength of local and state economies, several issuers reduced the amount of
short-term  borrowing  needed.  Additionally,  many  issuers came to market with
securities with maturities beyond the 13-month maximum restriction allowable for
tax-exempt  money  funds.  Other  issues were converted to a shortened synthetic
structure  thus  eliminating  the ability to extend out into the one-year range.
This  reduction in supply resulted in lower yields for most one-year paper, both
national and state-specific.

We extended your Fund's average maturity to the 45-day range during the summer
months,  just  prior  to  the market strengthening. Your Fund benefited from our
purchase of securities in the one-year range at yields significantly higher than
what  is  currently  available  in  the market. As the summer progressed, yields
began  to drop as they reflected the diminished supply of one-year notes. During
this  period  we  utilized  the  commercial  paper market to maintain the Fund's
average  maturity.  As year-end approaches, we will continue to search for those
longer-term  investment  opportunities  which  will  lock  in higher rates while
providing  an  attractive return to the New York-tax exempt investor. As always,
we  will  structure  the portfolio in an attempt to maximize current yield while
maintaining our commitment to high quality tax-exempt investments.

               Very truly yours,


               [Signature logo Richard J. Moynihan]


               Richard J. Moynihan

               Director, Municipal Portfolio Management

               The Dreyfus Corporation

December 15, 1998

New York, N.Y.

*Annualized  effective  yield  is  based  upon  dividends  declared  daily  and
reinvested monthly.

<TABLE>
DREYFUS NEW YORK TAX EXEMPT MONEY MARKET FUND
- -----------------------------------------------------------------------------

STATEMENT OF INVESTMENTS                        NOVEMBER 30, 1998 (UNAUDITED)

                                                                                                   Principal

Tax Exempt Investments--100.3%                                                                      Amount            Value
- -------------------------------------------------------
                                                                                                _____________     _____________
<S>                                                                                              <C>               <C>
NEW YORK--98.4%

Erie County, RAN 4%, 10/31/99 (LOC; The Bank of New York). . . . . . . . . . . . . . . . .       $  5,000,000      $  5,042,018

Long Island Power Authority, Electric Systems Revenue, CP
  3%, 2/9/99 (LOC: Bayerische Landesbank and Westdeutche Landesbank) . . . . . . . . . . .          5,000,000         5,000,000

Metropolitan Transportation Authority, Transportation Facility Revenue, CP
  3.10%, Series 1, 2/9/99 (LOC; ABN-Amro Bank)   . . . . . . . . . . . . . . . . . . . . .         13,000,000        13,000,000

Monroe County Industrial Development Agency, Revenue, VRDN (Enbi Corp.)
  3% (LOC; Rabobank Nederland) (a) . . . . . . . . . . . . . . . . . . . . . . . . . . . .          4,700,000         4,700,000

Municipal Assistance Corporation, VRDN
  3.20%, Series K-3 (LOC; Landesbank Hessen) (a) . . . . . . . . . . . . . . . . . . . . .         13,000,000        13,000,000

New York City, VRDN:
  3.30%, Series B-3 (Insured; MBIA and LOC; Bank of Nova Austria) (a)  . . . . . . . . . .          6,950,000         6,950,000
  3.30%, Series E-2 (LOC; Morgan Guaranty Trust Co.) (a) . . . . . . . . . . . . . . . . .          2,600,000         2,600,000
  3.30%, Series E-5 (LOC; Morgan Guaranty Trust Co.) (a) . . . . . . . . . . . . . . . . .          7,750,000         7,750,000
  3.35%, Series A-4 (LOC; Chase Manhattan Bank) (a)  . . . . . . . . . . . . . . . . . . .          5,000,000         5,000,000

New York City Health and Hospital Corporation, Health Systems Revenue, VRDN
  2.90%, Series B (LOC; Canadian Imperial Bank of Commerce) (a)  . . . . . . . . . . . . .          7,900,000         7,900,000

New York City Housing Development Corporation, MFMR, VRDN
  (York Avenue Development Project) 3.15% (LOC; Midland Bank) (a)  . . . . . . . . . . . .          7,000,000         7,000,000

New York City Industrial Development Agency, VRDN:
  Civil Facility Revenue (Mercy College Project)
    3.05% (LOC; The Bank of New York) (a)  . . . . . . . . . . . . . . . . . . . . . . . .          1,600,000         1,600,000
  IDR (Stroheim & Roman Project)
    3.05% (LOC; Westdeutsche Landesbank) (a) . . . . . . . . . . . . . . . . . . . . . . .          5,700,000         5,700,000

New York City Municipal Water Finance Authority:
  CP 3%, Series 1, 3/15/99 (LOC: Bank of Nova Scotia, Commerz Bank and
    Toronto-Dominion Bank) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .         15,000,000        15,000,000
  Water and Sewer Systems Revenue, VRDN
    3.30%, Series C (Liquidity and Insured; FGIC) (a)  . . . . . . . . . . . . . . . . . .         25,605,000        25,605,000

New York City Trust, Cultural Resource Revenue, Refunding, VRDN
  (American Museum of Natural History)
  2.75%, Series A (Insured; MBIA and BPA; Credit Suisse) (a) . . . . . . . . . . . . . . .          5,765,000         5,765,000

State of New York, CP 3.10%, 2/17/99 (LOC; Westdeutsche Landesbank). . . . . . . . . . . .         10,000,000        10,000,000

New York State Dormitory Authority, LR, Refunding (State University Dormitory Facilities)
  5%, Series A, 7/1/99 (Insured; AMBAC)  . . . . . . . . . . . . . . . . . . . . . . . . .          7,385,000         7,440,408

New York State Energy, Research and Development Authority, PCR:
  (LILCO Project)
    3.531%, Series B, 3/1/99 (LOC; Deutsche Bank) (a)  . . . . . . . . . . . . . . . . . .         10,000,000        10,000,000
  VRDN:
    (Central Hudson Gas and Electric)
       3.25%, Series A (LOC; Union Bank of Switzerland) (a)  . . . . . . . . . . . . . . .          2,600,000         2,600,000
    (Niagara Mohawk Power Corp.)
       3.35%, Series C (LOC; Canadian Imperial Bank of Commerce) (a) . . . . . . . . . . .          2,100,000         2,100,000

DREYFUS NEW YORK TAX EXEMPT MONEY MARKET FUND
- -----------------------------------------------------------------------------

STATEMENT OF INVESTMENTS (CONTINUED)            NOVEMBER 30, 1998 (UNAUDITED)

                                                                                                   Principal

Tax Exempt Investments (continued)                                                                  Amount            Value
- -------------------------------------------------------

                                                                                                _____________     _____________
NEW YORK (CONTINUED)

New York State Environmental Facilities Corporation, RRR, VRDN (Equity Huntington Project)
  3.35% (LOC: Union Bank of Switzerland) (a) . . . . . . . . . . . . . . . . . . . . . . .       $  1,300,000      $  1,300,000

New York State Housing Finance Agency, Contract Obligation, VRDN
  2.90%, Series A (LOC; Commerzbank) (a) . . . . . . . . . . . . . . . . . . . . . . . . .         11,000,000        11,000,000

New York State Local Government Assistance Corporation, VRDN:
  2.90%, Series A (LOC: Credit Suisse and Union Bank of Switzerland) (a) . . . . . . . . .         38,000,000        38,000,000
  2.90%, Series F (LOC; Toronto-Dominion Bank) (a) . . . . . . . . . . . . . . . . . . . .          9,900,000         9,900,000
  2.95%, Series B (LOC; Krediet Bank) (a)  . . . . . . . . . . . . . . . . . . . . . . . .          5,000,000         5,000,000

New York State Medical Care Facilities Finance Agency, Revenue, VRDN
  (Pooled Equipment Loan Program) 3.10%, Series 1  (LOC; Chase Manhattan Bank) (a) . . . .         10,000,000        10,000,000

New York State Power Authority, Revenue, CP
  3%, 12/2/98 (Liquidity: Bank of Nova Scotia, Commerzbank, Credit Locale de France,
  Landeshessen-Thuringen, Morgan Guaranty Trust Co. and Toronto-Dominion Bank) . . . . . .         13,000,000        13,000,000

Port Authority of New York and New Jersey, Special Obligation Revenue, VRDN
  (Versatile Structure) 3.35%, Series A (LOC; Landesbank Hessen) (a) . . . . . . . . . . .          4,300,000         4,300,000

Sachem Central School District, TAN (Holbrook) 4%, 6/25/99 . . . . . . . . . . . . . . . .          7,500,000         7,513,495

Three Village Central School District, TAN (Brookhaven and Smithtown) 3.90%, 6/30/99 . . .          8,000,000         8,013,359

Westchester County Health Care Corporation, CP 3%, Series 1, 12/7/98 . . . . . . . . . . .         10,000,000        10,000,000

U.S. Related--1.9%

Commonwealth of Puerto Rico, TRAN 3.50%, Series A, 7/30/99 . . . . . . . . . . . . . . . .          5,500,000         5,523,100

                                                                                                                  _____________

TOTAL INVESTMENTS (cost $287,302,380). . . . . . . . . . . . . . . . . . . . . . . . . . .             100.3%      $287,302,380

                                                                                                      =======     =============


LIABILITIES, LESS CASH AND RECEIVABLES . . . . . . . . . . . . . . . . . . . . . . . . . .               (.3%)    $    (732,116)

                                                                                                      =======     =============

NET ASSETS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .             100.0%      $286,570,264

                                                                                                      =======     =============


DREYFUS NEW YORK TAX EXEMPT MONEY MARKET FUND
- -----------------------------------------------------------------------------


Summary of Abbreviations
- -----------------------------------------------------------------------------

AMBAC       American Municipal Bond Assurance Corporation           MFMR        Multi-Family Mortgage Revenue

BPA         Bond Purchase Agreement                                 PCR         Pollution Control Revenue

CP          Commercial Paper                                        RAN         Revenue Anticipation Notes

FGIC        Financial Guaranty Insurance Company                    RRR         Resources Recovery Revenue

IDR         Industrial Development Revenue                          TAN         Tax Anticipation Notes

LOC         Letter of Credit                                        TRAN        Tax and Revenue Anticipation Notes

LR          Lease Revenue                                           VRDN        Variable Rate Demand Notes

MBIA        Municipal Bond Investors Assurance

               Insurance Corporation

Summary of Combined Ratings (Unaudited)
- -----------------------------------------------------------------------------

Fitch                or            Moody's             or            Standard & Poor's              Percentage of Value

____                               ________                          ________________               __________________

F1+/F1                             VMIG1/MIG1, P1                    SP1+/SP1, A1+/A1                      97.4%

Not Rated (b)                      Not Rated (b)                     Not Rated (b)                           2.6

                                                                                                          ______

                                                                                                          100.0%

                                                                                                          ======


Notes to Statement of Investments:
- -----------------------------------------------------------------------------

(a)Securities  payable  on demand. Variable interest rate--subject to periodic
 change.

(b)Securities  which,  while not rated by Fitch, Moody's and Standard & Poor's
 have  been determined by the Manager to be of comparable quality to those rated
 securities in which the Fund may invest.

                      SEE NOTES TO FINANCIAL STATEMENTS.
</TABLE>
<TABLE>

DREYFUS NEW YORK TAX EXEMPT MONEY MARKET FUND
- -----------------------------------------------------------------------------

STATEMENT OF ASSETS AND LIABILITIES             NOVEMBER 30, 1998 (UNAUDITED)

                                                                                                     Cost            Value


                                                                                                _____________     _____________
<S>                                                                                              <C>               <C>
ASSETS:                          Investments in securities--See Statement of Investments . .     $287,302,380      $287,302,380

                                 Cash  . . . . . . . . . . . . . . . . . . . . . . . . . .                            3,858,057

                                 Interest receivable . . . . . . . . . . . . . . . . . . .                            1,110,198

                                                                                                                  _____________

                                                                                                                    292,270,635

                                                                                                                  _____________

LIABILITIES:                     Due to The Dreyfus Corporation and affiliates . . . . . .                              127,053

                                 Payable for investment securities purchased . . . . . . .                            5,523,100

                                 Accrued expenses and other liabilities  . . . . . . . . .                               50,218

                                                                                                                  _____________

                                                                                                                      5,700,371

                                                                                                                  _____________

NET ASSETS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                         $286,570,264

                                                                                                                  =============


REPRESENTED BY:                  Paid-in capital . . . . . . . . . . . . . . . . . . . . .                         $286,633,367

                                 Accumulated net realized gain (loss) on investments . . .                             (63,103)

                                                                                                                  _____________

NET ASSETS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                         $286,570,264

                                                                                                                  =============

SHARES OUTSTANDING

(UNLIMITED NUMBER OF $.001 PAR VALUE SHARES OF BENEFICIAL INTEREST AUTHORIZED) . . . . . .                          286,633,367

NET ASSET VALUE, offering and redemption price per share . . . . . . . . . . . . . . . . .                                $1.00

                                                                                                                         ======


STATEMENT OF OPERATIONS                SIX MONTHS ENDED NOVEMBER 30, 1998 (UNAUDITED)

</TABLE>
<TABLE>

INVESTMENT INCOME
<S>                                                                                           <C>                   <C>
INCOME                           Interest Income . . . . . . . . . . . . . . . . .                               $    4,738,505

EXPENSES:                        Management fee--Note 2(a) . . . . . . . . . . . .            $       717,424

                                 Shareholder servicing costs--Note 2(b)  . . . . .                    152,328

                                 Professional fees . . . . . . . . . . . . . . . .                     18,886

                                 Custodian fees  . . . . . . . . . . . . . . . . .                     15,688

                                 Trustees' fees and expenses--Note 2(c)  . . . . .                      9,351

                                 Registration fees . . . . . . . . . . . . . . . .                      6,752

                                 Prospectus and shareholders' reports  . . . . . .                      2,969

                                 Miscellaneous . . . . . . . . . . . . . . . . . .                      4,619

                                                                                                _____________

                                    Total Expenses . . . . . . . . . . . . . . . .                                      928,017

                                                                                                                  _____________

INVESTMENT INCOME--NET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                                    3,810,488

NET REALIZED GAIN (LOSS) ON INVESTMENTS--Note 1(b) . . . . . . . . . . . . . . . .                                         (632)

                                                                                                                  _____________

NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS . . . . . . . . . . . . . . .                               $    3,809,856

                                                                                                                  =============


                       SEE NOTES TO FINANCIAL STATEMENTS
</TABLE>
<TABLE>

DREYFUS NEW YORK TAX EXEMPT MONEY MARKET FUND
- -----------------------------------------------------------------------------

STATEMENT OF CHANGES IN NET ASSETS

                                                                                         Six Months Ended

                                                                                        November 30, 1998         Year Ended

                                                                                           (Unaudited)           May 31, 1998

                                                                                        __________________       _____________
<S>                                                                                         <C>                  <C>
OPERATIONS:

   Investment income--net  . . . . . . . . . . . . . . . . . . . . . . . . . . . . .        $    3,810,488       $    8,620,715

   Net realized gain (loss) on investments . . . . . . . . . . . . . . . . . . . . .                  (632)              (4,789)

                                                                                             _____________        _____________

       Net Increase (Decrease) in Net Assets Resulting from Operations . . . . . . .             3,809,856            8,615,926

                                                                                             _____________        _____________

DIVIDENDS TO SHAREHOLDERS FROM:

   Investment income--net  . . . . . . . . . . . . . . . . . . . . . . . . . . . . .            (3,810,488)          (8,620,715)

                                                                                             _____________        _____________

BENEFICIAL INTEREST TRANSACTIONS ($1.00 per share):

   Net proceeds from shares sold . . . . . . . . . . . . . . . . . . . . . . . . . .           162,415,473          357,550,281

   Dividends reinvested  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .             3,606,072            8,147,298

   Cost of shares redeemed . . . . . . . . . . . . . . . . . . . . . . . . . . . . .          (160,724,527)        (375,947,667)

                                                                                             _____________        _____________

       Increase (Decrease) in Net Assets from Beneficial Interest Transactions . . .             5,297,018          (10,250,088)

                                                                                             _____________        _____________

          Total Increase (Decrease) in Net Assets  . . . . . . . . . . . . . . . . .             5,296,386          (10,254,877)

NET ASSETS:

   Beginning of Period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .           281,273,878          291,528,755

                                                                                             _____________        _____________

   End of Period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .          $286,570,264         $281,273,878

                                                                                             =============        =============


                      SEE NOTES TO FINANCIAL STATEMENTS.
</TABLE>
<TABLE>

DREYFUS NEW YORK TAX EXEMPT MONEY MARKET FUND
- -----------------------------------------------------------------------------

FINANCIAL HIGHLIGHTS

  Contained  below  is  per  share  operating  performance  data  for a share of
Beneficial  Interest outstanding, total investment return, ratios to average net
assets  and  other supplemental data for each period indicated. This information
has been derived from the Fund's financial statements.




                                                      Six Months Ended

                                                      November 30, 1998                 Year Ended May 31,

                                                                             __________________________________________________

PER SHARE DATA:                                        (Unaudited)            1998       1997       1996      1995     1994

                                                      _____________          _______    _______   _______   _______   _______
<S>                                                         <C>             <C>         <C>       <C>       <C>       <C>
   Net asset value, beginning of period  . . . . . .        $  1.00         $  1.00     $  1.00   $  1.00   $  1.00   $  1.00

                                                            _______          _______    _______   _______   _______   _______


   Investment Operations:

   Investment income--net  . . . . . . . . . . . . .           .013             .029       .028      .030      .027      .017

                                                            _______          _______    _______   _______   _______   _______


   Distributions:

   Dividends from investment income--net . . . . . .          (.013)           (.029)     (.028)    (.030)    (.027)    (.017)

                                                            _______          _______    _______   _______   _______   _______

   Net asset value, end of period  . . . . . . . . .        $  1.00          $  1.00    $  1.00   $  1.00   $  1.00   $  1.00

                                                            =======          =======    =======   =======   =======   =======


TOTAL INVESTMENT RETURN. . . . . . . . . . . . . . .           2.67%*           2.97%      2.83%     3.05%     2.76%     1.69%

RATIOS/SUPPLEMENTAL DATA:

   Ratio of expenses to average net assets . . . . .            .65%*            .67%       .68%      .64%      .68%      .68%

   Ratio of net investment income

       to average net assets . . . . . . . . . . . .           2.66%*           2.93%      2.79%     3.00%     2.71%     1.68%

   Net Assets, end of period (000's Omitted) . . . .       $286,570         $281,274   $291,529  $298,768  $317,840  $343,964
- -----------------------------

*   Annualized.

                      SEE NOTES TO FINANCIAL STATEMENTS.
</TABLE>

DREYFUS NEW YORK TAX EXEMPT MONEY MARKET FUND
- -----------------------------------------------------------------------------

NOTES TO FINANCIAL STATEMENTS (UNAUDITED)

NOTE 1--SIGNIFICANT ACCOUNTING POLICIES:

Dreyfus New York Tax Exempt Money Market Fund (the "Fund") is registered under
the  Investment Company Act of 1940, as amended (the "Act") as a non-diversified
open-end  management  investment  company. The Fund's investment objective is to
provide  investors  with  as high a level of current income exempt from Federal,
New  York  State  and  New  York  City  income  taxes  as is consistent with the
preservation   of   capital  and  the  maintenance  of  liquidity.  The  Dreyfus
Corporation (the "Manager") serves as the Fund's investment adviser. The Manager
is  a  direct subsidiary of Mellon Bank, N.A. Premier Mutual Fund Services, Inc.
is  the distributor of the Fund's shares, which are sold to the public without a
sales charge.

  It  is the Fund's policy to maintain a continuous net asset value per share of
$1.00; the Fund has adopted certain investment, portfolio valuation and dividend
and distribution policies to enable it to do so. There is no assurance, however,
that  the  Fund  will  be able to maintain a stable net asset value per share of
$1.00.

  The  Fund' s  financial  statements  are prepared in accordance with generally
accepted accounting principles which may require the use of management estimates
and assumptions. Actual results could differ from those estimates.

  (A)  PORTFOLIO  VALUATION:  Investments  in securities are valued at amortized
cost, which has been determined by the Fund's Board of Trustees to represent the
fair value of the Fund's investments.

(B) SECURITIES TRANSACTIONS AND INVESTMENT INCOME: Securities transactions are
recorded  on  a  trade date basis. Interest income, adjusted for amortization of
premiums  and original issue discounts on investments, is earned from settlement
date and recognized on the accrual basis. Realized gain and loss from securities
transactions  are  recorded  on  the  identified cost basis. Cost of investments
represents  amortized  cost.  Under the terms of the custody agreement, the Fund
received  net  earnings  credits of $10,470 during the period ended November 30,
1998  based on available cash balances left on deposit. Income earned under this
arrangement is included in interest income.

  The  Fund  follows  an  investment  policy of investing primarily in municipal
obligations  of  one  state. Economic changes affecting the state and certain of
its  public  bodies  and municipalities may affect the ability of issuers within
the  state to pay interest on, or repay principal of, municipal obligations held
by the Fund.

  (C)  DIVIDENDS  TO  SHAREHOLDERS:  It  is  the  policy  of the Fund to declare
dividends  daily  from  investment  income-net. Such dividends are paid monthly.
Dividends from net realized capital gain, if any, are normally declared and paid
annually, but the Fund may make distributions on a more frequent basis to comply
with  the  distribution  requirements  of  the Internal Revenue Code of 1986, as
amended (the "Code"). To the extent that net realized capital gain can be offset
by  capital loss carryovers, it is the policy of the Fund not to distribute such
gain.

  (D)  FEDERAL INCOME TAXES: It is the policy of the Fund to continue to qualify
as a regulated investment company, which can distribute tax exempt dividends, by
complying  with the applicable provisions of the Code, and to make distributions
of  income  and  net  realized  capital  gain  sufficient  to  relieve  it  from
substantially all Federal income and excise taxes.

  The  Fund  has  an  unused  capital  loss  carryover  of approximately $44,000
available  for  Federal  income  tax  purposes  to be applied against future net
securities  profits,  if any, realized subsequent to May 31, 1998. The carryover
does  not  include  net realized securities losses from November 1, 1997 through
May  31,  1998, which are treated, for Federal income tax purposes as arising in
fiscal  1999.  If  not  applied, $1,000 of the carryover expires in fiscal 1999,
$2,000 expires in fiscal 2002, $27,000 expires in fiscal 2003, $7,000 expires in
fiscal 2004, $3,000 expires in fiscal 2005 and $4,000 expires in fiscal 2006.

DREYFUS NEW YORK TAX EXEMPT MONEY MARKET FUND
- -----------------------------------------------------------------------------

NOTES TO FINANCIAL STATEMENTS (UNAUDITED) (CONTINUED)

  At  November 30, 1998, the cost of investments for Federal income tax purposes
was substantially the same as the cost for financial reporting purposes (see the
Statement of Investments).

NOTE 2--MANAGEMENT FEE AND OTHER TRANSACTIONS WITH AFFILIATES:

  (A)  Pursuant  to  a  management agreement ("Agreement") with the Manager, the
management  fee  is computed at the annual rate of .50 of 1% of the value of the
Fund' s  average daily net assets and is payable monthly. The Agreement provides
that if in any full fiscal year the aggregate expenses of the Fund, exclusive of
taxes, brokerage, interest on borrowings and extraordinary expenses, exceed 1(1)
/2%  of  the value of the Fund's average net assets the Fund may deduct from the
payments  to  be  made  to  the  Manager,  or  the Manager will bear such excess
expense.  During  the  period  ended  November  30,  1998,  there was no expense
reimbursement pursuant to the Agreement.

  (B)  Under  the Shareholder Services Plan, the Fund reimburses Dreyfus Service
Corporation,  a  wholly-owned subsidiary of the Manager, an amount not to exceed
an  annual rate of .25 of 1% of the value of the Fund's average daily net assets
for certain allocated expenses of providing personal services and/or maintaining
shareholder  accounts.  The  services  provided  may  include  personal services
relating  to  shareholder  accounts,  such  as  answering  shareholder inquiries
regarding  the  Fund  and  providing reports and other information, and services
related  to  the  maintenance  of  shareholder accounts. During the period ended
November  30,  1998,  the  Fund  was charged $74,103 pursuant to the Shareholder
Services Plan.

  The  Fund compensates Dreyfus Transfer, Inc., a wholly-owned subsidiary of the
Manager,   under  a  transfer  agency  agreement  for  providing  personnel  and
facilities  to  perform transfer agency services for the Fund. During the period
ended  November  30, 1998, the Fund was charged $53,728 pursuant to the transfer
agency agreement.

  (C)  Each  trustee  who  is  not  an "affiliated person" as defined in the Act
receives from the Fund an annual fee of $1,500 and an attendance fee of $250 per
meeting.  The  Chairman  of  the  Board  receives  an  additional  25%  of  such
compensation.


Dreyfus lion "d" logo                                   (reg.tm)

Dreyfus logo                                   (reg.tm)

DREYFUS NEW YORK  TAX EXEMPT

MONEY MARKET FUND

200 Park Avenue

New York, NY 10166

MANAGER

The Dreyfus Corporation

200 Park Avenue

New York, NY 10166

CUSTODIAN

The Bank of New York

90 Washington Street

New York, NY 10286

TRANSFER AGENT &

DIVIDEND DISBURSING AGENT

Dreyfus Transfer, Inc.

P.O. Box 9671

Providence, RI 02940










Printed in U.S.A.                                             273SA9811

New York

Tax Exempt

Money Market Fund

Semi-Annual Report

November 30, 1998






© 2022 IncJournal is not affiliated with or endorsed by the U.S. Securities and Exchange Commission