VANGUARD MONEY MARKET RESERVES INC
N-30D, 1995-07-17
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<PAGE>   1
                               CHAIRMAN'S LETTER

FELLOW SHAREHOLDER:

Following the sharp rise in short-term interest rates that took place from
March to December of 1994, rates stabilized at high levels during most of the
six months ended May 31--the first half of the 1995 fiscal year for Vanguard
Money Market Reserves--before sliding lower in the final weeks of the period.
The end result was that the net income on each of our three Portfolios
increased by about +80% compared to the first half of 1994.

       The table below shows the impact of the dramatic surge in short-term
rates on our annualized yields over the past year and one-half:

<TABLE>
<CAPTION>
- --------------------------------------------------------
                      Seven-Day Annualized Yield
               -----------------------------------------
               May 31, November 30, May 31, November 30,
Portfolio       1995      1994       1994       1993
- --------------------------------------------------------
<S>             <C>        <C>        <C>       <C>
PRIME           5.9%       5.1%       3.8%      3.0%
FEDERAL         5.8        5.0        3.7       3.0
U.S. TREASURY   5.5        4.8        3.5       2.8
- --------------------------------------------------------
</TABLE>

With the Federal Reserve Board remaining relatively tight-fisted in its
monetary policy during the past six months, the stability in money market
yields resulted simply from the diminishing threat of further increases in the
Federal funds rate (at which banks borrow from one another). Contrast this
stability with fiscal 1994, when the Fed raised this key rate on fully six
separate occasions. It would appear that the Fed's tough policy is bearing
fruit: inflation so far remains quite subdued, and business activity has slowed
to a more normal growth rate.

       As always, the pundits do not agree on what comes next. Some look for a
continuation of the present tight monetary policy; others expect a rate
reduction, given lessened inflation expectations and the likely pressure that
the Administration, with a Presidential election year before it, is apt to put
on the Fed to stimulate the economy. Still others, expecting inflation to
return to the economy, believe that a further rise in short-term rates may be
required. That is a wide spread of opinion! My guess is that extreme changes in
rates--either up or down--are unlikely to take place during the remainder of
our fiscal year.

       Whatever the case may be, your holdings in Vanguard Money Market
Reserves are certain to remain attractive relative to other comparable money
market fund portfolios. The principal reason for our income advantage, as you
know, is that our operating expenses are so much lower than industry norms. Our
Prime Portfolio, for example, operates at an annual expense ratio of about 0.3%
compared with 0.7% for our average competitor. This advantage of 0.4% carries
directly to the bottom line: the yield you receive. Thus, in a market in which
gross yields are, say, 6%, the Prime Portfolio would provide a net yield of
5.7%, compared with 5.3% for other money market portfolios.

       I want to underscore that our higher yields do not arise from the Fund's
ownership of lower quality money market instruments.  Our Portfolio quality is,
we believe, unsurpassed in the money market field. Other funds which stinted on
quality last year ran the risk of price declines that would potentially reduce
their net asset values below the $1.00 level that investors have come to take
for granted. In fact, the managers of some 25 money market funds actually had
to shore up their funds' asset values with cash infusions. Our focus on quality
precluded our having to do so.

       Investors who are concerned about the quality of non-governmental
holdings in their money market funds can, of course, easily exchange to a U.S.
Treasury money market portfolio holding instruments guaranteed by the full
faith and credit of the U.S.  Government. In Vanguard Money Market Reserves, as
shown in the table to the left, the yield sacrifice for making such a switch is
small; in most other prime money market funds, with their substantially higher
costs, switching to Vanguard's Treasury Portfolio can actually result in an
enhanced yield.
                                                                     (continued)





                                       1
<PAGE>   2
         Your Portfolios' early returns for 1995, then, are absolutely good,
and relatively strong. We look forward to providing you with more information
in our Annual Report six months hence.

Sincerely,


/s/ JOHN C. BOGLE    
- ---------------------
John C. Bogle
Chairman of the Board

June 13, 1995

Note: Mutual fund data from Lipper Analytical Services, Inc.

AVERAGE ANNUAL TOTAL RETURNS--THE CURRENT YIELDS QUOTED IN THE CHAIRMAN'S
LETTER ARE CALCULATED IN ACCORDANCE WITH SEC GUIDELINES.  THE AVERAGE ANNUAL
TOTAL RETURNS FOR THE PORTFOLIOS (PERIODS ENDED MARCH 31, 1995) ARE AS FOLLOWS:

<TABLE>
<CAPTION>
                                                               AVERAGE ANNUAL TOTAL RETURN
                                 INCEPTION                    ------------------------------                                  
PORTFOLIO                           DATE                      1 YEAR     5 YEAR      10 YEAR
- -------------                    ---------                    ------     ------      -------
<S>                                <C>                        <C>        <C>         <C>
PRIME                               6/4/75                    +4.78%     +4.91%      +6.27%
FEDERAL                            7/13/81                    +4.72      +4.81       +6.10
U.S. TREASURY                      3/13/89*                   +4.46      +4.63       +5.87
                                                                                           
</TABLE>

*TOTAL RETURNS PROVIDED PRIOR TO MARCH 13, 1989, ARE FOR THE INSURED PORTFOLIO,
WHICH BEGAN OPERATIONS ON MARCH 9, 1983.

ALL OF THESE DATA REPRESENT PAST PERFORMANCE; FUTURE RETURNS WILL FLUCTUATE. AN
INVESTMENT IN A MONEY MARKET FUND IS NEITHER INSURED NOR GUARANTEED BY THE U.S.
GOVERNMENT, AND THERE IS NO ASSURANCE THAT THE FUND WILL BE ABLE TO MAINTAIN A
STABLE NET ASSET VALUE OF $1.00 PER SHARE.





                                       2
<PAGE>   3
                       REPORT FROM THE INVESTMENT ADVISER

On balance, money market interest rates fell somewhat in the first half of
fiscal year 1995 as expectations of future short-term rates traveled from
extreme pessimism to outright optimism. The bond markets started the fiscal
year with the worst case scenario of a protracted period of rising interest
rates factored into interest rate levels. This pessimism was fostered by the
experience of 1994, when the Federal Reserve (the "Fed") raised interest rates
with the intention of cooling the surging economy.

       The Fed, which attempts to steer the economy on a path of sustainable,
non-inflationary growth by raising and lowering the cost of borrowing for
businesses and consumers, did in fact raise short-term interest rates in
February 1995. The Fed increased the Federal funds rate (the rate at which
banks borrow and lend reserves among themselves) by 0.5% to 6.0%.  However, by
this time, government statistics were giving preliminary hints that economic
growth was moderating and inflation was relatively well behaved.  As is typical
of markets, investors looked to the most current data and began to abandon
their expectations of more Fed rate hikes.  This touched off an impressive bond
market rally that has continued up to the timeof this writing.

       As signs of the slower economy have proliferated, money market interest
rates actually have included expectations of cuts in short-term interest rates
by the Fed. The money market yield curve (the curve plotting the relationship
of interest rates for investments of various maturities from short-term to
long-term) has adopted an inverted configuration with six-month and one-year
rates below those for shorter maturities. This condition indicates that the
market expects the Fed to lower short-term rates by as much as 0.5% in the
coming months.

       The underlying assumption is that the Fed has succeeded in engineering a
"soft landing" for the economy. While a soft landing no doubt would be a highly
desirable outcome for bond and stock market investors, a review of economic
history shows that it is highly unlikely. Monetary policy is not precise enough
to achieve such a result without a healthy dose of good luck. Unfortunately,
the high variability in both the timing and magnitude of the economy's response
to policy changes makes the Fed's activities more an art than a science.

       Throughout the wild swings in market expectations of this fiscal half
year, we have steered a conservative course for the various Portfolios of the
Vanguard Money Market Reserves Fund. Specifically, we have kept the average
weighted maturity of the Portfolios in the market neutral band of our
investment policy guidelines. This has helped us to ride out the market's
gyrations this year. By keeping our interest rate sensitivity stable, we were
able to lock in some attractive yields when rates were higher, and by the same
token, we are not making excessive commitments to the market now that rates
have fallen.

       In terms of the credit quality of our investments, we have determined
that lower quality money market securities generally do not provide adequate
additional return for the additional credit risk taken. Thus, we have
emphasized high credit quality issuers in the Prime Portfolio, the holdings of
which are all rated in the highest category by the nationally recognized credit
rating agencies.

       Finally, we have not invested (nor will we) in the risky or exotic
derivative securities that have caused losses for investors whose managers did
not fully evaluate the risks of such strategies. As always, we are relying on
our conservative management philosophy in combination with our exceptionally
low-cost structure to provide our investors with highly competitive returns and
peace of mind.

Sincerely,

Ian A. MacKinnon, Senior Vice President

Robert F. Auwaerter, Vice President

John Hollyer, Assistant Vice President

Vanguard Fixed Income Group

June 15, 1995





                                       3
<PAGE>   4
                                                            FINANCIAL STATEMENTS
                                                                     (unaudited)
                                                                    May 31, 1995

                            STATEMENT OF NET ASSETS


<TABLE>
<CAPTION>
                                                         Face             Market
                                                       Amount              Value
PRIME PORTFOLIO                                         (000)             (000)+
- --------------------------------------------------------------------------------
<S>                                                 <C>             <C>
U.S. GOVERNMENT AND AGENCY
  OBLIGATIONS (14.1%)
- --------------------------------------------------------------------------------
  Federal Home Loan Bank
     5.86%-9.50%,
     5/24/96-6/6/96                                 $  61,615       $     61,327
     6.02%-6.185%,
     6/5/95-7/3/95(1)                                 785,100            784,945
  Federal Home Loan
  Mortgage Corp.
     5.898%-6.649%,
     6/21/95-3/28/96                                   58,975             57,505
     6.083%, 6/5/95(1)                                100,000             99,962
  Federal National Mortgage Assn.
     6.002%-6.205%,
     6/5/95-7/18/95(1)                                600,000            599,736
     5.83%-9.20%, 6/20/95-6/6/96                      781,675            778,278
- --------------------------------------------------------------------------------
TOTAL U.S. GOVERNMENT AND
  AGENCY OBLIGATIONS
     (Cost $2,381,753)                                                 2,381,753
- --------------------------------------------------------------------------------
COMMERCIAL PAPER (57.6%)
- --------------------------------------------------------------------------------
BANK HOLDING COMPANIES (3.9%)
  Banc One Corp.
     5.981%-6.112%,
     6/15/95-8/4/95                                   135,400            134,698
  CoreStates Capital
     6.041%-6.136%,
     6/6/95-7/12/95                                    48,000             47,810
  J.P. Morgan & Co., Inc.
     5.983%-6.114%,
     6/6/95-7/24/95                                   314,000            312,986
  Norwest Corp.
     5.985%-6.097%,
     6/13/95-8/25/95                                  130,000            128,892
  Republic New York Corp.
     6.115%, 6/6/95                                    30,000             29,975
                                                                     -----------
         GROUP TOTAL                                                     654,361
                                                                     -----------
- --------------------------------------------------------------------------------
FINANCE--AUTO (2.1%)
  Daimler-Benz N.A. Co.
     5.975%, 6/23/95                                   20,935             20,859
  Ford Motor Credit Corp.
     5.976%-6.04%,
     6/23/95-7/28/95                                  316,000            313,271
  Toyota Motor Credit Corp.
     6.093%-6.176%,
     6/5/95-8/2/95                                     30,000             29,833
                                                                     -----------
         GROUP TOTAL                                                     363,963
                                                                     -----------
- --------------------------------------------------------------------------------
FINANCE--OTHER (18.4%)
  A.I. Credit Corp.
     6.04%-6.769%,
     6/8/95-7/17/95                                    85,000             84,661
  American Express Credit Corp.
     5.993%-6.113%,
     6/5/95-7/27/95                                   150,000            149,472
  Ameritech Capital Funding Corp.
     5.952%-6.077%,
     7/31/95-2/12/96                                  124,000            121,544
  Asset Securitization
     Cooperative Corp.
     5.995%-6.151%,
     6/1/95-8/14/95                                   301,823            299,428
  Associates Corp.
     6.018%-6.082%,
     6/2/95-8/11/95                                   325,000            322,826
  Cargill Financial
     5.956%-5.969%,
     9/25/95-9/29/95                                   50,000             49,042
  Ciesco L.P.
     5.977%-6.093%,
     6/15/95-8/10/95                                  254,866            252,967
  CIT Group Holdings Inc.
     5.987%-6.121%,
     6/2/95-7/13/95                                   325,000            323,682
  Commercial Credit Co.
     6.018%-6.061%,
     6/13/95-7/14/95                                  125,000            124,374
  Corporate Asset Funding Corp.
     5.996%-6.198%,
     6/26/95-8/3/95                                   155,665            154,437
  Eiger Capital Corp.
     5.965%-5.979%,
     6/8/95-6/23/95                                   113,490            113,138
  General Electric Capital Corp.
     6.023%-6.912%,
     6/12/95-8/28/95                                  620,000            614,613
  Harvard University
     5.961%-6.04%,
     6/2/95-8/14/95                                    30,000             29,875
  Household Finance Corp.
     6.136%-6.137%,
     6/6/95-6/7/95                                    100,000             99,907
  Matterhorn Capital Corp.
     6.03%, 6/14/95                                    50,000             49,892
  Pitney Bowes Credit Corp.
     5.987%-6.122%,
     6/14/95-8/29/95                                  170,380            169,013
  Stanford University
     6.782%, 7/10/95                                   10,000              9,929
</TABLE>



                                       
                                       4
<PAGE>   5
<TABLE>
<CAPTION>
                                                         Face             Market
                                                       Amount              Value
                                                        (000)             (000)+
- --------------------------------------------------------------------------------
<S>                                                 <C>             <C>
Transamerica Finance
  5.999%-6.061%,
  6/16/95-7/7/95                                     $150,000        $   149,491
                                                                      ----------
     GROUP TOTAL                                                       3,118,291
                                                                      ----------
- --------------------------------------------------------------------------------
INDUSTRIAL (13.1%)
  Amtrak Trust
     6.214%, 6/5/95(1)*                                80,581             80,580
  Bayer Corp.
     5.989%-6.114%,
     6/5/95-8/14/95                                    90,000             89,470
  Campbell Soup Co.
     6.04%, 8/4/95                                      6,000              5,937
  Cargill Inc.
     5.959%-6.093%,
     6/21/95-8/30/95                                  142,500            141,607
  Chevron Oil Finance Co.
     5.987%-6.062%,
     6/7/95-7/7/95                                    350,000            348,892
  Chevron Transport Corp.
     5.995%-6.007%,
     7/14/95-9/25/95                                   20,000             19,739
  R.R. Donnelley & Sons Co.
     5.984%-6.008%,
     6/23/95-7/21/95                                   42,800             42,552
  Emerson Electric Co.
     6.002%, 7/10/95                                   22,100             21,958
  Exxon Imperial U.S. Inc.
     5.994%-6.068%,
     6/26/95-8/28/95                                  107,068            106,055
  H.J. Heinz & Co.
     5.976%, 7/10/95                                   32,900             32,688
  Hewlett Packard Co.
     5.969%-6.089%,
     6/27/95-8/29/95                                  105,000            104,026
  Kimberly Clark Corp.
     5.987%, 7/17/95                                   45,000             44,660
  Eli Lilly & Co.
     5.956%-6.138%,
     6/9/95-8/18/95                                   217,000            215,559
  Lockheed Martin Corp.
     6.00%, 6/15/95                                    24,780             24,722
  McDonald's Corp.
     5.966%, 6/13/95                                   24,130             24,082
  Miles Inc.
     6.137%, 6/20/95                                   20,000             19,936
  Mobil Australia Finance Co.
     6.065%-6.144%,
     6/16/95-8/18/95                                   27,887             27,713
  Motorola Inc.
     5.99%-5.997%, 6/1/95-7/13/95                      50,000             49,827
  Nestle Capital Corp.
     5.939%-6.08%,
     6/16/95-10/23/95                                  91,747             91,015
  Norfolk Southern Corp.
     6.07%-6.17%, 7/10/95-8/3/95                       52,904             52,453
  Norwest Corp.
     5.997%, 8/29/95                                   15,000             14,781
  PepsiCo
     5.979%, 6/27/95                                   49,587             49,374
  Pfizer Inc.
     5.958%-5.97%,
     6/7/95-6/20/95                                   176,000            175,656
  Procter & Gamble Co.
     6.07%-6.072%, 8/1/95-8/2/95                       24,350             24,101
  Schering Corp.
     6.122%-6.24%,
     6/12/95-10/30/95                                  75,000             73,920
  Shell Oil Co.
     6.068%, 8/1/95                                    22,000             21,777
  SmithKline Beecham Corp.
     6.126%, 6/1/95                                    46,680             46,680
  United Parcel Service of America Inc.
     6.004%-6.101%, 6/1/95-8/2/95                      34,100             33,764
  Vermont American Corp.
     5.958%, 6/8/95                                    11,408             11,395
  Wal-Mart Stores Inc.
     5.989%-6.04%,
     7/21/95-8/4/95                                   153,000            151,613
  Warner Lambert Co.
     5.976%-6.105%, 6/8/95-8/1/95                      80,000             79,649
                                                                      ----------
         GROUP TOTAL                                                   2,226,181
                                                                      ----------
- --------------------------------------------------------------------------------
INSURANCE (3.6%)
  AIG Funding Inc.
     6.049%-6.323%,
     6/16/95-8/28/95                                   45,740             45,252
  John Hancock Capital Corp.
     6.122%, 6/29/95                                   25,000             24,883
  MetLife Funding Corp.
     5.983%-6.071%,
     7/24/95-7/31/95                                  233,466            231,296
  Prudential Funding Corp.
     5.997%, 7/14/95                                  100,000             99,291
  Prudential Insurance
     5.969%, 6/9/95                                    15,000             14,980
  SAFECO Credit Co. Inc.
     6.033%-6.164%,
     6/14/95-8/7/95                                    36,500             36,247
  USAA Capital Corp.
     6.027%-6.157%,
     6/6/95-8/4/95                                    155,000            154,196
                                                                      ----------
         GROUP TOTAL                                                     606,145
                                                                      ----------
- --------------------------------------------------------------------------------
</TABLE>




                                       5
<PAGE>   6
                      STATEMENT OF NET ASSETS (continued)

<TABLE>
<CAPTION>
                                                         Face             Market
                                                       Amount              Value
                                                        (000)             (000)+
- --------------------------------------------------------------------------------
<S>                                                 <C>             <C>
UTILITIES (2.6%)
  Ameritech Corp.
     6.067%-6.468%,
     6/29/95-7/31/95                                 $123,531        $   122,482
  AT&T Corp.
     5.973%-6.003%,
     6/5/95-6/28/95                                    85,000             84,754
  BellSouth Telecommunications Inc.
     6.023%, 8/7/95                                    24,000             23,735
  Southwestern Bell Telephone Co.
     6.114%, 6/2/95                                    73,000             72,988
  U S WEST Communications Inc.
     6.009%-6.061%,
     6/20/95-7/26/95                                  138,000            137,032
                                                                      ----------
         GROUP TOTAL                                                     440,991
                                                                      ----------
- --------------------------------------------------------------------------------
FOREIGN BANKS (7.3%)
  ABN AMRO
     5.979%-5.981%,
     6/16/95-6/19/95                                   45,000             44,879
  Abbey National N.A.
     6.023%-6.733%,
     6/13/95-8/9/95                                   215,500            214,187
  Barclays U.S. Funding Corp.
     5.981%, 6/19/95                                  100,000             99,703
  Bayerische Landesbank Girozentrale
     6.096%, 7/31/95                                   25,000             24,750
  Bayerische Vereinsbank
     5.964%-6.881%, 6/5/95-7/5/95                      92,000             91,563
  Canadian Imperial Holdings Inc.
     6.009%, 7/7/95                                   138,000            137,179
  Commerzbank U.S. Finance Inc.
     5.979%-6.144%,
     6/9/95-6/30/95                                   142,078            141,770
  Commonwealth Bank of Australia
     6.01%, 7/19/95                                    38,000             37,698
  Toronto Dominion Holdings
     USA Inc.
     6.067%-6.876%,
     6/30/95-8/1/95                                   280,000            277,484
  UBS Finance (Delaware) Inc.
     5.958%, 6/9/95                                   174,841            174,610
                                                                      ----------
         GROUP TOTAL                                                   1,243,823
                                                                      ----------
- --------------------------------------------------------------------------------
CANADIAN GOVERNMENT--
     NATIONAL AND PROVINCIAL (2.0%)
  Canada Bills
     6.547%-6.771%,
     7/10/95-7/20/95                                  200,000            198,426
  Canadian Wheat Board
     6.07%-6.18%, 6/12/95-7/26/95                      74,900             74,548
  Federal Business Development Bank
     6.036%, 8/17/95                                   20,000             19,745
  Province of British Columbia
     5.964%-6.887%,
     7/10/95-11/8/95                                   53,600             52,658
                                                                      ----------
         GROUP TOTAL                                                     345,377
                                                                      ----------
- --------------------------------------------------------------------------------
OTHER FOREIGN GOVERNMENT (3.8%)
  Caisse des Depots et Consignations
     5.951%-6.102%,
     6/8/95-9/1/95                                    265,000            263,485
  Electricite de France
     6.091%-6.155%,
     6/26/95-7/5/95                                    90,000             89,563
  KFW International Finance Inc.
     5.981%-6.104%,
     6/6/95-7/19/95                                    55,000             54,783
  New South Wales Treasury Corp.
     5.997%-6.166%,
     6/5/95-7/21/95                                   180,331            179,449
  Oesterreichische Kontrollbank
     5.979%, 7/11/95                                   16,000             15,895
  Wool International
     5.994%, 7/28/95                                   40,000             39,624
                                                                      ----------
         GROUP TOTAL                                                     642,799
                                                                      ----------
- --------------------------------------------------------------------------------
FOREIGN INDUSTRIAL (.7%)
  BASF Corp.
     6.081%, 6/6/95                                    20,000             19,983
  Ciba Geigy Corp.
     6.094%, 8/3/95                                    10,000              9,895
  Glaxo Holdings
     6.021%-6.04%,
     6/22/95-6/23/95                                   42,500             42,350
  Siemens Corp.
     5.974%-6.345%,
     6/21/95-8/28/95                                   50,000             49,534
                                                                      ----------
         GROUP TOTAL                                                     121,762
                                                                      ----------
- --------------------------------------------------------------------------------
FOREIGN UTILITY (.1%)
  British Telecommunications PLC
     6.052%, 8/23/95                                   15,233             15,024
                                                                      ----------
- --------------------------------------------------------------------------------
TOTAL COMMERCIAL PAPER
  (Cost $9,778,717)                                                    9,778,717
- --------------------------------------------------------------------------------
CERTIFICATES OF DEPOSIT (21.4%)
- --------------------------------------------------------------------------------
U.S. BANKS (1.9%)
  American Express Centurion Bank
     6.10%, 6/9/95                                     25,000             25,000
  Banc One Corp. (Akron)
     5.99%, 6/28/95                                   100,000            100,001

</TABLE>



                                       
                                       6
<PAGE>   7

<TABLE>
<CAPTION>
                                                         Face             Market
                                                       Amount              Value
                                                        (000)             (000)+
- --------------------------------------------------------------------------------
<S>                                                 <C>             <C>
  Banc One Corp. (Cleveland)
     5.99%, 6/28/95                                 $  48,000       $     48,000
  National Bank of Detroit
     6.00%, 6/30/95                                   150,000            150,000
                                                                      ----------
         GROUP TOTAL                                                     323,001
                                                                      ----------
- --------------------------------------------------------------------------------
YANKEE CERTIFICATES OF DEPOSIT--
     CANADIAN BRANCHES (.4%)
  ABN AMRO
     6.00%, 6/16/95                                    50,000             49,876
  Barclays Bank
     6.062%, 6/14/95                                   25,000             24,946
                                                                      ----------
         GROUP TOTAL                                                      74,822
                                                                      ----------
- --------------------------------------------------------------------------------
YANKEE CERTIFICATES OF DEPOSIT--
     U.S. BRANCHES (19.1%)
  ABN AMRO
     5.98%-6.26%, 8/4/95-8/25/95                      170,000            170,005
  Bank of Montreal
     6.01%-6.08%, 6/9/95-7/26/95                      277,000            277,003
  Bank of Nova Scotia
     5.97%-6.18%, 6/9/95-7/17/95                      300,000            300,000
  Barclays Bank
     5.98%, 6/19/95                                   100,000            100,000
  Bayerische Hypo Bank
     6.01%-6.18%, 6/5/95-7/10/95                      152,000            152,003
  Bayerische Landesbank
     6.06%-6.17%, 6/19/95-8/3/95                      316,000            316,007
  Bayerische Vereinsbank
     6.01%, 7/17/95                                   100,000            100,000
  Caisse Nationale de Credit Agricole
     6.12%-6.31%, 6/29/95-9/22/95                     175,000            175,000
  Canadian Imperial
     Bank of Commerce
     6.005%-6.02%,
     6/12/95-7/6/95                                   125,000            125,000
  Commerzbank
     6.08%, 6/12/95                                    40,000             40,000
  Credit Suisse
     6.17%-6.21%,
     9/21/95-10/19/95                                  53,000             53,021
  Dresdner Bank
     6.17%, 6/29/95                                   148,000            148,000
  Lloyds Bank
     6.13%-6.18%, 6/12/95-6/23/95                      70,000             70,001
  National Westminster Bank
     6.01%-6.875%,
     6/12/95-7/31/95                                  337,000            337,008
  Rabobank Nederlanden
     6.75%, 6/5/95                                     19,000             19,000
  Societe Generale
     6.01%-6.06%,
     6/13/95-8/22/95                                  325,000            325,004
  Swiss Bank
     5.97%-6.01%,
     7/24/95-8/29/95                                  243,000            243,000
  Westdeutsche Landesbank
     6.07%-6.08%, 6/6/95-7/27/95                      275,000            275,000
                                                                      ----------
         GROUP TOTAL                                                   3,225,052
                                                                      ----------
- --------------------------------------------------------------------------------
TOTAL CERTIFICATES OF DEPOSIT
  (Cost $3,622,875)                                                    3,622,875
- --------------------------------------------------------------------------------
EURODOLLAR CERTIFICATES
  OF DEPOSIT (4.5%)
- --------------------------------------------------------------------------------
  Abbey National
     6.02%-6.25%,
     6/12/95-7/19/95                                  157,000            157,003
  Bayerische Landesbank Girozentrale
     6.13%-6.17%, 6/1/95-7/6/95                       109,000            109,003
  Commerzbank
     6.08%, 7/26/95                                    35,000             35,002
  Deutsche Bank
     6.13%-6.82%, 6/16/95-8/8/95                      268,000            268,041
  Lloyds Bank
     6.75%, 7/11/95                                    10,000             10,006
  Morgan Guaranty
     6.18%, 9/26/95                                    15,000             15,000
  National Westminster Bank
     6.29%-6.52%, 8/9/95-10/5/95                       35,000             35,030
  Rabobank Nederlanden
     6.10%-6.16%, 8/9/95-9/5/95                        35,000             35,001
  Toronto Dominion
     5.95%, 11/1/95                                    50,000             50,000
  Union Bank of Switzerland
     7.25%, 9/29/95                                    40,000             40,011
- --------------------------------------------------------------------------------
TOTAL EURODOLLAR
  CERTIFICATES OF DEPOSIT
  (Cost $754,097)                                                        754,097
- --------------------------------------------------------------------------------
BANKERS ACCEPTANCES (.9%)
- --------------------------------------------------------------------------------
  Republic Bank of New York
     6.671%, 6/5/95                                    11,000             10,992
  Wachovia Bank of Georgia
     5.966%-6.554%, 6/5/95-8/1/95                      93,100             92,440
  Wachovia Bank of North Carolina
     5.967%-6.141%,
     6/6/95-7/31/95                                    45,200             44,934
- --------------------------------------------------------------------------------
TOTAL BANKERS ACCEPTANCES
  (Cost $148,366)                                                        148,366
- --------------------------------------------------------------------------------
</TABLE>



                                       7

<PAGE>   8
                      STATEMENT OF NET ASSETS (continued)

<TABLE>
<CAPTION>
                                                         Face           Market  
                                                       Amount            Value  
                                                        (000)           (000)+  
- -------------------------------------------------------------------------------  
<S>                                               <C>              <C>          
OTHER NOTES (3.2%)
- -------------------------------------------------------------------------------
  Bank One (Texas)
     6.306%-6.337%,
     6/1/95-6/2/95(1)                                $145,000        $   145,000
  Morgan Bank (Delaware)
     5.86%-5.90%, 6/6/95(1)                           145,000            144,980
  National Bank of Detroit
     6.30%, 9/20/95                                    50,000             49,998
  State Street Bank & Trust
     6.18%, 6/12/95                                    50,000             50,000
  Wachovia Bank of North Carolina
     6.01%, 8/15/95                                    50,000             50,000
     6.115%, 7/3/95(1)                                100,000            100,000
- --------------------------------------------------------------------------------
TOTAL OTHER NOTES
  (Cost $539,978)                                                        539,978
- --------------------------------------------------------------------------------
TOTAL INVESTMENTS (101.7%)
  (Cost $17,225,786)                                                  17,225,786
- --------------------------------------------------------------------------------
OTHER ASSETS AND LIABILITIES (-1.7%)
- --------------------------------------------------------------------------------
  Other Assets--Note B                                                   174,763
  Liabilities                                                           (466,977)
                                                                      ----------
                                                                        (292,214)
- --------------------------------------------------------------------------------
NET ASSETS (100%)
- --------------------------------------------------------------------------------
  Applicable to 16,933,438,795 outstanding
     $.001 par value shares
     (authorized 25,000,000,000 shares)                              $16,933,572
- --------------------------------------------------------------------------------
NET ASSET VALUE PER SHARE                                                  $1.00
================================================================================
</TABLE>

 +  See Note A to Financial Statements.
(1) Floating Rate Note.
 *  Put Option Obligation.

<TABLE>
<CAPTION>
- -----------------------------------------------------------------------------------
AT MAY 31, 1995, NET ASSETS CONSISTED OF:
- -----------------------------------------------------------------------------------
                                                       Amount                   Per
                                                        (000)                 Share
                                                  -----------              --------
<S>                                               <C>                         <C>
  Paid in Capital                                 $16,933,437                 $1.00
  Undistributed Net
     Investment Income                                     --                    --
  Accumulated Net
     Realized Gains                                       135                    --
  Unrealized Appreciation
     of Investments                                        --                    --
- -----------------------------------------------------------------------------------
NET ASSETS                                        $16,933,572                 $1.00
- -----------------------------------------------------------------------------------
</TABLE>

<TABLE>
<CAPTION>
                                                         Face             Market  
                                                       Amount              Value  
FEDERAL PORTFOLIO                                       (000)             (000)+  
- --------------------------------------------------------------------------------  
<S>                                               <C>                         <C>
U.S. GOVERNMENT AND AGENCY
 OBLIGATIONS (92.8%)
- --------------------------------------------------------------------------------
  Federal Home Loan Bank
     6.02%-6.197%,
     6/5/95-7/3/95(1)                                $219,965        $   219,919
     6.026%-7.017%,
     6/5/95-9/6/95                                    132,975            132,345
  Federal Home Loan Mortgage
   Corp.6.083%, 6/5/95(1)                             100,000             99,962
     5.898%-6.649%,6/2/95-3/28/96                     915,387            907,983
  Federal National Mortgage Assn.
     5.889%-6.731%,
     6/9/95-11/27/95                                  767,990            761,547
  Overseas Private Investment Corp.
     (U.S. Government Guaranteed)
     6.286%-6.458%,
     6/6/95-11/25/95(1)*                              124,682            124,682
- --------------------------------------------------------------------------------  
TOTAL U.S. GOVERNMENT AND
 AGENCY OBLIGATIONS
 (Cost $2,246,438)                                                     2,246,438
- --------------------------------------------------------------------------------  
REPURCHASE AGREEMENTS (6.1%)
- --------------------------------------------------------------------------------  
  BT Securities Corp.
     6.15%, 6/1/95
     (Collateralized by U.S. Treasury
     Bond 11.25%, 2/15/15)                            140,000            140,000
  Goldman Sachs
     6.10%, 6/1/95
     (Collateralized by U.S. Treasury
     Bond 8.75%, 8/15/20)                               7,810              7,810
- --------------------------------------------------------------------------------  
TOTAL REPURCHASE AGREEMENTS
 (Cost $147,810)                                                         147,810
- --------------------------------------------------------------------------------  
TOTAL INVESTMENTS (98.9%)
 (Cost $2,394,248)                                                     2,394,248
- --------------------------------------------------------------------------------  
OTHER ASSETS AND LIABILITIES (1.1%)
- --------------------------------------------------------------------------------  
  Other Assets--Note B                                                    34,223
  Liabilities                                                            (8,168)
                                                                      ----------
                                                                          26,055
- --------------------------------------------------------------------------------  
NET ASSETS (100%)
- --------------------------------------------------------------------------------  
  Applicable to 2,420,179,767 outstanding 
    $.001 par value shares                
    (authorized 5,000,000,000 shares)                                 $2,420,303
- --------------------------------------------------------------------------------  
NET ASSET VALUE PER SHARE                                                  $1.00
================================================================================  
</TABLE>
 +  See Note A to Financial Statements.
(1) Floating Rate Note.
 *  Put Option Obligation.




                                       8
<PAGE>   9

<TABLE>
<CAPTION>
- -----------------------------------------------------------------------------------
AT MAY 31, 1995, NET ASSETS CONSISTED OF:
- -----------------------------------------------------------------------------------
                                                       Amount                   Per
                                                        (000)                 Share
                                                   ----------                 -----
<S>                                                <C>                        <C>
Paid in Capital                                    $2,420,209                 $1.00
Undistributed Net
  Investment Income                                        --                    --
Accumulated Net
  Realized Gains                                           94                    --
Unrealized Appreciation
  of Investments                                           --                    --
- -----------------------------------------------------------------------------------
NET ASSETS                                         $2,420,303                 $1.00
- -----------------------------------------------------------------------------------
</TABLE>

<TABLE>
<CAPTION>
                                                         Face             Market
                                                       Amount              Value
U.S. TREASURY PORTFOLIO                                 (000)             (000)+
- --------------------------------------------------------------------------------
<S>                                                <C>                <C>       
U.S. GOVERNMENT OBLIGATIONS (104.4%)                                            
- --------------------------------------------------------------------------------
U.S. TREASURY BILLS                                                             
  5.67%-5.824%,                                                                 
  6/1/95-8/31/95                                   $1,954,633         $1,942,506
U.S. TREASURY NOTES                                                             
  4.125%-10.50%,                                                                
  6/30/95-8/15/95                                     453,340            454,038
- --------------------------------------------------------------------------------
TOTAL U.S. GOVERNMENT                                                           
 OBLIGATIONS (Cost $2,396,544)                                         2,396,544
- --------------------------------------------------------------------------------
OTHER ASSETS AND LIABILITIES (-4.4%)                                            
- --------------------------------------------------------------------------------
  Accounts Receivable for Securities Sold                                226,501
  Other Assets--Note B                                                    25,819
  Accounts Payable for Securities Purchased                             (343,164)
  Other Liabilities                                                      (10,020)
                                                                      -----------
                                                                        (100,864)
- --------------------------------------------------------------------------------
NET ASSETS (100%)                                                               
- --------------------------------------------------------------------------------
  Applicable to 2,295,437,299 outstanding                                       
   $.001 par value shares                                                       
  (authorized 5,000,000,000 shares)                                   $2,295,680
- --------------------------------------------------------------------------------
NET ASSET VALUE PER SHARE                                                  $1.00
================================================================================
</TABLE>
+ See Note A to Financial Statements.


<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------
AT MAY 31, 1995, NET ASSETS CONSISTED OF:
- --------------------------------------------------------------------------------
                                                       Amount                Per
                                                        (000)              Share
                                                   ----------              -----
<S>                                                <C>                     <C>
Paid in Capital                                    $2,295,456              $1.00
Undistributed Net                                                          
  Investment Income                                        --                 --
Accumulated Net                                                            
  Realized Gains                                          224                 --
Unrealized Appreciation                                                    
  of Investments                                           --                 --
- --------------------------------------------------------------------------------
NET ASSETS                                         $2,295,680              $1.00
- --------------------------------------------------------------------------------
</TABLE>



                                       9
<PAGE>   10
                            STATEMENT OF OPERATIONS


<TABLE>
<CAPTION>
                                                                      PRIME                   FEDERAL             U.S. TREASURY
                                                                  PORTFOLIO                 PORTFOLIO                 PORTFOLIO
- -------------------------------------------------------------------------------------------------------------------------------
                                                           Six Months Ended          Six Months Ended          Six Months Ended
                                                               May 31, 1995              May 31, 1995               May 31,1995
                                                                      (000)                     (000)                     (000)
- -------------------------------------------------------------------------------------------------------------------------------
<S>                                                    <C>          <C>          <C>           <C>          <C>         <C>
INVESTMENT INCOME
  INCOME
     Interest   . . . . . . . . . . . . . . . . .                   $482,454                   $67,912                  $61,589
- -------------------------------------------------------------------------------------------------------------------------------
         Total Income   . . . . . . . . . . . . .                    482,454                    67,912                   61,589
- -------------------------------------------------------------------------------------------------------------------------------
  EXPENSES
     The Vanguard Group--Note B
         Investment Advisory Services   . . . . .      $     984                 $   142                    $   137
         Management and Administrative  . . . . .         20,844                   2,916                      2,825
         Marketing and Distribution   . . . . . .          2,142      23,970         309         3,367          295       3,257
                                                       ---------                 -------                    -------
     Custodian's Fees   . . . . . . . . . . . . .                        229                        46                       30
     Taxes (other than income taxes)  . . . . . .                        647                       107                       86
     Auditing Fees  . . . . . . . . . . . . . . .                         11                         4                        4
     Shareholders' Reports  . . . . . . . . . . .                        254                        38                       31
     Annual Meeting and Proxy Costs   . . . . . .                        322                        47                       50
     Directors' Fees and Expenses   . . . . . . .                         29                         4                        4
- -------------------------------------------------------------------------------------------------------------------------------
         Total Expenses   . . . . . . . . . . . .                     25,462                     3,613                    3,462
- -------------------------------------------------------------------------------------------------------------------------------
           Net Investment Income  . . . . . . . .                    456,992                    64,299                   58,127
- -------------------------------------------------------------------------------------------------------------------------------
REALIZED NET GAIN (LOSS) ON
  INVESTMENT SECURITIES SOLD    . . . . . . . . .                        (53)                       17                       51
- -------------------------------------------------------------------------------------------------------------------------------
UNREALIZED APPRECIATION
  (DEPRECIATION) OF
  INVESTMENT SECURITIES   . . . . . . . . . . . .                         --                        --                       --
- -------------------------------------------------------------------------------------------------------------------------------
           Net Increase in Net Assets
              Resulting from Operations   . . . .                   $456,939                   $64,316                  $58,178
===============================================================================================================================
</TABLE>




                                      10
<PAGE>   11

                      STATEMENT OF CHANGES IN NET ASSETS

<TABLE>
<CAPTION>
                                                                 PRIME                     FEDERAL                 U.S. TREASURY
                                                             PORTFOLIO                   PORTFOLIO                     PORTFOLIO
- --------------------------------------------------------------------------------------------------------------------------------
                                             SIX MONTHS           Year    SIX MONTHS            Year  SIX MONTHS            Year
                                                  ENDED          Ended         ENDED           Ended       ENDED           Ended
                                                MAY 31,   November 30,       MAY 31,    November 30,      MAY 31,   November 30,
                                                   1995           1994          1995            1994         1995           1994
                                                  (000)          (000)         (000)           (000)        (000)          (000)
- ------------------------------------------------------------------------------------------------------------------------------- 
<S>                                         <C>            <C>            <C>             <C>          <C>           <C>
INCREASE IN NET ASSETS
OPERATIONS
  Net Investment Income   . . . . . . . .   $   456,992    $   510,164    $   64,299      $   76,777   $   58,127    $   69,207
  Realized Net Gain (Loss)  . . . . . . .           (53)           (97)           17             (55)          51           (24)
  Unrealized Appreciation
    (Depreciation)  . . . . . . . . . . .            --             --            --              --           --            --
- ------------------------------------------------------------------------------------------------------------------------------- 
         Net Increase in
            Net Assets Resulting       
            from Operations . . . . . . .       456,939        510,067        64,316          76,722       58,178        69,183
- ------------------------------------------------------------------------------------------------------------------------------- 
DISTRIBUTIONS (1)
  Net Investment Income   . . . . . . . .      (456,992)      (510,164)      (64,299)        (76,777)     (58,127)      (69,207)
- ------------------------------------------------------------------------------------------------------------------------------- 
CAPITAL SHARE TRANSACTIONS
  (AT $1.00 PER SHARE)
  Issued   --Regular  . . . . . . . . . .     7,906,110     12,442,610       842,343       1,302,611    1,061,740     1,583,805
           --In Lieu of Cash
             Distributions  . . . . . . .       435,991        489,573        61,218          73,348       55,479        66,010
           --Exchange   . . . . . . . . .     2,332,473      5,289,175       259,978         643,634      303,799       594,652
  Redeemed --Regular  . . . . . . . . . .    (6,769,396)   (11,774,731)     (725,506)     (1,294,420)    (770,859)   (1,269,326)
           --Exchange   . . . . . . . . .    (2,080,270)    (3,705,050)     (214,171)       (435,756)    (410,587)     (670,287)
- ------------------------------------------------------------------------------------------------------------------------------- 
  Net Increase from
     Capital Share
     Transactions   . . . . . . . . . . .     1,824,908      2,741,577       223,862         289,417      239,572       304,854
- ------------------------------------------------------------------------------------------------------------------------------- 
  Total Increase  . . . . . . . . . . . .     1,824,855      2,741,480       223,879         289,362      239,623       304,830
- ------------------------------------------------------------------------------------------------------------------------------- 
NET ASSETS
  Beginning of Period   . . . . . . . . .    15,108,717     12,367,237     2,196,424       1,907,062    2,056,057     1,751,227
- ------------------------------------------------------------------------------------------------------------------------------- 
  End of Period   . . . . . . . . . . . .   $16,933,572    $15,108,717    $2,420,303      $2,196,424   $2,295,680    $2,056,057
=============================================================================================================================== 
  (1) Income Dividends
      Per Share   . . . . . . . . . . . .         $.029          $.038         $.028           $.038        $.027         $.036
- ------------------------------------------------------------------------------------------------------------------------------- 
</TABLE>




                                       11
<PAGE>   12
                              FINANCIAL HIGHLIGHTS


<TABLE>
<CAPTION>
                                                                                       PRIME PORTFOLIO
- -----------------------------------------------------------------------------------------------------------------------------
                                                                                    Year Ended November 30,
                                                  SIX MONTHS ENDED     ------------------------------------------------------
For a Share Outstanding Throughout Each Period        MAY 31, 1995      1994       1993        1992          1991        1990
- -----------------------------------------------------------------------------------------------------------------------------
<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
  Net Investment Income   . . . . . . . . . . .               .029      .038       .030        .038          .062        .080
  Net Realized and Unrealized Gain (Loss)
     on Investments   . . . . . . . . . . . . .                 --        --         --          --            --          --
                                                             -----     -----      -----       -----         -----       -----
         TOTAL FROM INVESTMENT OPERATIONS   . .               .029      .038       .030        .038          .062        .080
- -----------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
  Dividends from Net Investment Income  . . . .              (.029)    (.038)     (.030)      (.038)        (.062)      (.080)
  Distributions from Realized Capital Gains . .                 --        --         --          --            --          --
                                                             -----     -----      -----       -----         -----       -----
         TOTAL DISTRIBUTIONS    . . . . . . . .              (.029)    (.038)     (.030)      (.038)        (.062)      (.080)
- -----------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD  . . . . . . . .              $1.00     $1.00      $1.00       $1.00         $1.00       $1.00
=============================================================================================================================
TOTAL RETURN  . . . . . . . . . . . . . . . . .             +2.90%    +3.87%     +3.02%      +3.89%        +6.39%      +8.32%
- -----------------------------------------------------------------------------------------------------------------------------
RATIOS/SUPPLEMENTAL DATA
- ------------------------
Net Assets, End of Period (Millions)  . . . . .            $16,934   $15,109    $12,367     $12,638       $13,496     $13,579
Ratio of Expenses to Average Net Assets . . . .              .32%*      .32%       .32%        .30%          .30%        .30%
Ratio of Net Investment Income to
  Average Net Assets  . . . . . . . . . . . . .             5.74%*     3.84%      2.98%       3.82%         6.20%       8.06%
- -----------------------------------------------------------------------------------------------------------------------------
</TABLE>

<TABLE>
<CAPTION>
                                                                                      FEDERAL PORTFOLIO
- -----------------------------------------------------------------------------------------------------------------------------
                                                                                    Year Ended November 30,
                                                  SIX MONTHS ENDED    -------------------------------------------------------
For a Share Outstanding Throughout Each Period        MAY 31, 1995      1994       1993        1992          1991        1990
- -----------------------------------------------------------------------------------------------------------------------------
<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
  Net Investment Income   . . . . . . . . . . .               .028      .038       .029        .038          .060        .078
  Net Realized and Unrealized Gain (Loss)   . .
    on Investments  . . . . . . . . . . . . . .                 --        --         --          --            --          --
                                                             -----     -----      -----       -----         -----       -----
        TOTAL FROM INVESTMENT OPERATIONS    . .               .028      .038       .029        .038          .060        .078
- -----------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
  Dividends from Net Investment Income  . . . .              (.028)    (.038)     (.029)      (.038)        (.060)      (.078)
  Distributions from Realized Capital Gains . .                 --        --         --          --            --          --
                                                             -----     -----      -----       -----         -----       -----
         TOTAL DISTRIBUTIONS    . . . . . . . .              (.028)    (.038)     (.029)      (.038)        (.060)      (.078)
- -----------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD  . . . . . . . .              $1.00     $1.00      $1.00       $1.00         $1.00       $1.00
=============================================================================================================================
TOTAL RETURN  . . . . . . . . . . . . . . . . .             +2.87%    +3.82%     +2.98%      +3.83%        +6.18%      +8.14%
- -----------------------------------------------------------------------------------------------------------------------------
RATIOS/SUPPLEMENTAL DATA
- ------------------------
Net Assets, End of Period (Millions)  . . . . .             $2,420    $2,196     $1,907      $1,986        $2,000      $1,950
Ratio of Expenses to Average Net Assets . . . .              .32%*      .32%       .32%        .30%          .30%        .30%
Ratio of Net Investment Income to
  Average Net Assets  . . . . . . . . . . . . .             5.69%*     3.78%      2.94%       3.76%         6.01%       7.90%
- -----------------------------------------------------------------------------------------------------------------------------
* Annualized.
</TABLE>



                                      12
<PAGE>   13
<TABLE>
<CAPTION>
                                                                                   U.S. TREASURY PORTFOLIO
- -----------------------------------------------------------------------------------------------------------------------------
                                                                                    Year Ended November 30,
                                                  SIX MONTHS ENDED    -------------------------------------------------------
For a Share Outstanding Throughout Each Period        MAY 31, 1995      1994       1993        1992          1991        1990
- -----------------------------------------------------------------------------------------------------------------------------
<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
  Net Investment Income   . . . . . . . . . . .               .027      .036       .028        .036          .058        .077
  Net Realized and Unrealized Gain (Loss)
     on Investments   . . . . . . . . . . . . .                 --        --         --          --            --          --
                                                             -----     -----      -----       -----         -----       -----

         TOTAL FROM INVESTMENT OPERATIONS   . .               .027      .036       .028        .036          .058        .077
- -----------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
  Dividends from Net Investment Income  . . . .              (.027)    (.036)     (.028)      (.036)        (.058)      (.077)
  Distributions from Realized Capital Gains . .                 --        --         --          --            --          --
                                                             -----     -----      -----       -----         -----       -----
         TOTAL DISTRIBUTIONS    . . . . . . . .              (.027)    (.036)     (.028)      (.036)        (.058)      (.077)
- -----------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD  . . . . . . . .              $1.00     $1.00      $1.00       $1.00         $1.00       $1.00
=============================================================================================================================
TOTAL RETURN  . . . . . . . . . . . . . . . . .             +2.71%    +3.63%     +2.86%      +3.68%        +5.94%      +8.02%
- -----------------------------------------------------------------------------------------------------------------------------
RATIOS/SUPPLEMENTAL DATA
- ------------------------
Net Assets, End of Period (Millions)  . . . . .             $2,296    $2,056     $1,751      $2,321        $2,092      $1,594
Ratio of Expenses to Average Net Assets . . . .              .32%*      .32%       .32%        .30%          .30%        .30%
Ratio of Net Investment Income to
  Average Net Assets  . . . . . . . . . . . . .             5.37%*     3.59%      2.83%       3.60%         5.76%       7.74%
- -----------------------------------------------------------------------------------------------------------------------------
* Annualized.
</TABLE>




                                       13
<PAGE>   14
                         NOTES TO FINANCIAL STATEMENTS

Vanguard Money Market Reserves is registered under the Investment Company Act
of 1940 as a diversified open-end investment company and consists of the Prime,
Federal, and U.S. Treasury Portfolios. The Prime Portfolio invests in
short-term debt instruments of companies primarily operating in specific
industries; the issuers' abilities to meet their obligations may be affected by
economic developments in such industries. The Federal Portfolio invests in
short-term debt instruments issued by the U.S. Government or its agencies and
instrumentalities. The U.S. Treasury Portfolio invests in short-term debt
instruments backed by the full faith and credit of the U.S. Government.

A.  The following significant accounting policies are in conformity with
generally accepted accounting principles for investment companies. Such
policies are consistently followed by the Fund in the preparation of financial
statements.

1. SECURITY VALUATION: Securities are stated at amortized cost which
   approximates market value.

2. FEDERAL INCOME TAXES: Each Portfolio of the Fund intends to continue to
   qualify as a regulated investment company and distribute all of its taxable
   income. Accordingly, no provision for Federal income taxes is required in
   the financial statements.

3. OTHER: Security transactions are accounted for on the date the securities are
   purchased or sold. Costs used in determining realized gains and losses on
   the sale of investment securities are those of specific securities sold.
   Discounts and premiums are accreted and amortized, respectively, to interest
   income over the lives of the respective securities. Distributions from net
   investment income are declared on a daily basis payable on the first
   business day of the following month.

4. REPURCHASE AGREEMENTS: Securities pledged as collateral for repurchase
   agreements are held by the Fund's custodian bank until maturity of the
   repurchase agreement. Provisions of each agreement ensure that the market
   value of the collateral is sufficient in the event of default; however, in
   the event of default or bankruptcy by the other party to the agreement,
   realization and/or retention of the collateral may be subject to legal
   proceedings.

B.  The Vanguard Group, Inc. furnishes at cost investment advisory, corporate
management, administrative, marketing, and distribution services. The costs of
such services are allocated to the Fund under methods approved by the Board of
Directors. At May 31, 1995, the Fund had contributed capital of $2,964,000 to
Vanguard (included in Other Assets), representing 14.8% of Vanguard's
capitalization. The directors and officers of the Fund are also directors and
officers of Vanguard.





                                       14
<PAGE>   15

                             DIRECTORS AND OFFICERS

JOHN C. BOGLE, Chairman and Chief Executive Officer
Chairman and Director of The Vanguard Group, Inc., and of each of the
investment companies in The Vanguard Group.

JOHN J. BRENNAN, President
President and Director of The Vanguard Group, Inc., and of each of the
investment companies in The Vanguard Group.

ROBERT E. CAWTHORN, Chairman of Rhone-Poulenc Rorer, Inc.; Director of Sun
Company, Inc.

BARBARA BARNES HAUPTFUHRER, Director of The Great Atlantic and Pacific Tea
Company, Alco Standard Corp., Raytheon Company, Knight-Ridder, Inc., and
Massachusetts Mutual Life Insurance Co.

BRUCE K. MACLAURY, President of The Brookings Institution; Director of American
Express Bank Ltd., The St. Paul Companies, Inc., and Scott Paper Company.

BURTON G. MALKIEL, Chemical Bank Chairman's Professor of Economics, Princeton
University; Director of Prudential Insurance Co. of America, Amdahl
Corporation, Baker Fentress & Co., The Jeffrey Co., and Southern New England
Communications Company.

ALFRED M. RANKIN, JR., Chairman, President, and Chief Executive Officer of
NACCO Industries, Inc.; Director of NACCO Industries, The BFGoodrich Company,
Reliance Electric Company, and The Standard Products Company.

JOHN C. SAWHILL, President and Chief Executive Officer of The Nature
Conservancy; formerly, Director and Senior Partner of McKinsey & Co. and
President of New York University; Director of Pacific Gas and Electric Company
and NACCO Industries.

JAMES O. WELCH, JR., Retired Chairman of Nabisco Brands, Inc.; retired Vice
Chairman and Director of RJR Nabisco; Director of TECO Energy, Inc.

J. LAWRENCE WILSON, Chairman and Chief Executive Officer of Rohm & Haas
Company; Director of Cummins Engine Company; Trustee of Vanderbilt University
and the Culver Educational Foundation.


OTHER FUND OFFICERS

RICHARD F. HYLAND, Treasurer; Treasurer of The Vanguard Group, Inc., and of
each of the investment companies in The Vanguard Group.

RAYMOND J. KLAPINSKY, Secretary; Senior Vice President and Secretary of The
Vanguard Group, Inc.; Secretary of each of the investment companies in The
Vanguard Group.

KAREN E. WEST, Controller; Vice President of The Vanguard Group, Inc.;
Controller of each of the investment companies in The Vanguard Group.


OTHER VANGUARD GROUP OFFICERS

ROBERT A. DISTEFANO           IAN A. MACKINNON
Senior Vice President         Senior Vice President
Information Technology        Fixed Income Group

JEREMY G. DUFFIELD            F. WILLIAM MCNABB III
Senior Vice President         Senior Vice President
Planning & Development        Institutional

JAMES H. GATELY               RALPH K. PACKARD
Senior Vice President         Senior Vice President
Individual Investor Group     Chief Financial Officer





                                      15
<PAGE>   16
                         THE VANGUARD FAMILY OF FUNDS
                                      
                              FIXED INCOME FUNDS

MONEY MARKET FUNDS
Vanguard Admiral Funds
U.S. Treasury Money
Market Portfolio
Vanguard Money Market Reserves

TAX-EXEMPT MONEY MARKET FUNDS
Vanguard Municipal Bond Fund
Money Market Portfolio
Vanguard State Tax-Free Funds
Money Market Portfolios
(CA, NJ, OH, PA)

TAX-EXEMPT INCOME FUNDS
Vanguard Municipal Bond Fund
Vanguard State Tax-Free Funds
Insured Longer-Term Portfolios
(CA, FL, NJ, NY, OH, PA)

INCOME FUNDS
Vanguard Admiral Funds
Vanguard Fixed IncomeSecurities Fund
Vanguard Preferred Stock Fund


                           EQUITY AND BALANCED FUNDS

GROWTH AND INCOME FUNDS
Vanguard Convertible
Securities Fund
Vanguard Equity Income Fund
Vanguard Quantitative Portfolios
Vanguard/Trustees' Equity Fund
U.S. Portfolio
Vanguard/Windsor Fund
Vanguard/Windsor II

BALANCED FUNDS
Vanguard Asset Allocation Fund
Vanguard LifeStrategy Funds
Income Portfolio
Conservative Growth Portfolio
Moderate Growth Portfolio
Growth Portfolio
Vanguard STAR Portfolio
Vanguard/Wellesley Income Fund
Vanguard/Wellington Fund

GROWTH FUNDS
Vanguard/Morgan Growth Fund
Vanguard/PRIMECAP Fund
Vanguard U.S. Growth Portfolio

AGGRESSIVE GROWTH FUNDS
Vanguard Explorer Fund
Vanguard Specialized Portfolios

INTERNATIONAL FUNDS
Vanguard International
Growth Portfolio
Vanguard/Trustees' Equity Fund
International Portfolio


                                  INDEX FUNDS

Vanguard Index Trust
Total Stock Market Portfolio
500 Portfolio
Extended Market Portfolio
Growth Portfolio
Value Portfolio
Small Capitalization Stock Portfolio

Vanguard International Equity
Index Fund
European Portfolio
Pacific Portfolio
Emerging Markets Portfolio
Vanguard Bond Index Fund
Vanguard Tax-Managed Fund
Vanguard Balanced Index Fund


                                    [LOGO]

<TABLE>
<S>                                                         <C>
                Vanguard Financial Center                   Valley Forge, Pennsylvania 19482

New Account Information: 1-(800) 662-7447                   Shareholder Account Services: 1-(800) 662-2739
</TABLE>

    This Report has been prepared for shareholders and may be distributed
to others only if preceded or accompanied by a current prospectus.  All Funds
            in the Vanguard Family are offered by prospectus only.

                                   Q302-5/95



[VANGUARD MONEY MARKET 
RESERVES LOGO]



SEMI-ANNUAL REPORT
MAY 31, 1995


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