VANGUARD INDEX TRUST
497, 1995-09-13
Previous: FIDELITY DESTINY PORTFOLIOS, 485APOS, 1995-09-13
Next: FIRSTAR CORP /WI/, S-4, 1995-09-13



<PAGE>   1
 
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
 
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
 
                                   FORM N-1A

                   REGISTRATION STATEMENT (NO. 2-56846) UNDER
                           THE SECURITIES ACT OF 1933
                          PRE-EFFECTIVE AMENDMENT NO.
                        POST-EFFECTIVE AMENDMENT NO. 41
                                      AND
 
              REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY
                                  ACT OF 1940
                                AMENDMENT NO. 43


                              VANGUARD INDEX TRUST
               (EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER)
 
                     P.O. BOX 2600, VALLEY FORGE, PA 19482
                    (ADDRESS OF PRINCIPAL EXECUTIVE OFFICE)
 
                  REGISTRANT'S TELEPHONE NUMBER (610) 669-1000
 
                         RAYMOND J. KLAPINSKY, ESQUIRE
                                  P.O. BOX 876
                             VALLEY FORGE, PA 19482
 
              IT IS PROPOSED THAT THIS AMENDMENT BECOME EFFECTIVE;
           on April 28, 1995, pursuant to paragraph (b) of Rule 485.
 
                 APPROXIMATE DATE OF PROPOSED PUBLIC OFFERING:
  As soon as practicable after this Registration Statement becomes effective.
 
     REGISTRANT ELECTS TO REGISTER AN INDEFINITE NUMBER OF SHARES PURSUANT TO
REGULATION 24F-2 UNDER THE INVESTMENT COMPANY ACT OF 1940. REGISTRANT FILED ITS
RULE 24F-2 NOTICE FOR THE YEAR ENDED DECEMBER 31, 1994 ON FEBRUARY 15, 1995.
 
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
<PAGE>   2
 
                              VANGUARD INDEX TRUST
 
                             CROSS REFERENCE SHEET
<TABLE>
<CAPTION>
FORM N-1A
ITEM NUMBER                                                    LOCATION IN PROSPECTUS
<C>           <S>                                              <C>
    Item 1.   Cover Page....................................   Cover Page
    Item 2.   Synopsis......................................   Highlights
    Item 3.   Condensed Financial Information...............   Financial Highlights
    Item 4.   General Description of Registrant.............   Investment Objectives; Investment
                                                               Limitations; Investment Policies;
                                                               General Information
    Item 5.   Management of the Funds.......................   Management of the Funds
    Item 6.   Capital Stock and Other Securities............   Opening an Account and Purchasing
                                                               Each Funds Shares; Selling Your
                                                               Shares; The Share Price of Each
                                                               Portfolio; Dividends, Capital Gains
                                                               and Taxes; General Information
    Item 7.   Purchase of Securities Being Offered..........   Cover Page; Opening an Account and
                                                               Purchasing Shares
    Item 8.   Redemption or Repurchase......................   Selling Your Shares
    Item 9.   Pending Legal Proceedings.....................   Not Applicable
 
<CAPTION>
FORM N-1A                                                      LOCATION IN STATEMENT
ITEM NUMBER                                                    OF ADDITIONAL INFORMATION
<C>           <S>                                              <C>
   Item 10.   Cover Page....................................   Cover Page
   Item 11.   Table of Contents.............................   Cover Page
   Item 12.   General Information and History...............   Investment Objectives and Policies
   Item 13.   Investment Objective and Policies.............   Investment Objectives and Policies;
                                                               Investment Limitations
   Item 14.   Management of the Fund........................   Management of the Fund
   Item 15.   Control Persons and Principal Holders of
              Securities....................................   Management of the Fund
   Item 16.   Investment Advisory and Other Services........   Management of the Fund
   Item 17.   Brokerage Allocation..........................   Not Applicable
   Item 18.   Capital Stock and Other Securities............   Financial Statements
   Item 19.   Purchase, Redemption and Pricing of Securities
              Being Offered.................................   Purchase of Shares; Redemption of
                                                               Shares
   Item 20.   Tax Status....................................   Appendix
   Item 21.   Underwriters..................................   Not Applicable
   Item 22.   Calculations of Yield Quotations of Money
              Market Fund...................................   Not Applicable
   Item 23.   Financial Statements..........................   Financial Statements
</TABLE>
<PAGE>   3
 
--------------------------------------------------------------------------------
 
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
 
[VANGUARD INDEX TRUST LOGO]
                                                  A Member of The Vanguard Group
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
 
   
PROSPECTUS -- APRIL 28, 1995; REVISED SEPTEMBER 15, 1995
    
--------------------------------------------------------------------------------
 
NEW ACCOUNT INFORMATION: INVESTOR INFORMATION DEPARTMENT -- 1-800-662-7447 
(SHIP)
--------------------------------------------------------------------------------
 
SHAREHOLDER ACCOUNT SERVICES: CLIENT SERVICES DEPARTMENT -- 1-800-662-2739 
(CREW)
--------------------------------------------------------------------------------
 
INVESTMENT
OBJECTIVE
AND POLICIES          Vanguard Index Trust (the "Trust") is an open-end
                      diversified investment company designed as an "index"
                      fund. THE TRUST CONSISTS OF SIX PORTFOLIOS: THE 500,
                      EXTENDED MARKET, TOTAL STOCK MARKET, SMALL CAPITALIZATION
                      STOCK, VALUE AND GROWTH PORTFOLIOS. Each of the Portfolios
                      invests in common stocks in order to match the investment
                      performance of a distinct market index. There is no
                      assurance that the Portfolios will achieve their stated
                      objectives. Shares of the Trust are neither insured nor
                      guaranteed by any agency of the U.S. Government, including
                      the FDIC.
--------------------------------------------------------------------------------
 
OPENING AN
ACCOUNT               To open a regular (non-retirement) account, please
                      complete and return the Account Registration Form. If you
                      need assistance in completing this Form, please call our
                      Investor Information Department. To open an Individual
                      Retirement Account (IRA), please use a Vanguard IRA
                      Adoption Agreement. To obtain a copy of this form, call
                      1-800-662-7447, Monday through Friday, from 8:00 a.m. to
                      8:00 p.m. and Saturday, from 9:00 a.m. to 4:00 p.m.
                      (Eastern time). The minimum initial investment is $3,000
                      for each Portfolio or $500 for Uniform Gifts/Transfers to
                      Minors Act accounts. A portfolio transaction fee of 1% is
                      deducted from purchases of the Small Capitalization Stock
                      Portfolio; a 0.5% portfolio transaction fee is deducted
                      from purchases of the Extended Market Portfolio; and a
                      0.25% portfolio transaction fee is deducted from purchases
                      of the Total Stock Market Portfolio. Portfolio transaction
                      fees are paid to the Portfolios to offset transaction
                      costs of buying securities of small- and medium-sized
                      companies. Shareholders in each Portfolio will also incur
                      a $10 annual account maintenance fee, deducted from the
                      Portfolio's dividend. See "Trust Expenses."
--------------------------------------------------------------------------------
 
   
ABOUT THIS
PROSPECTUS            This Prospectus is designed to set forth concisely the
                      information you should know about the Trust before you
                      invest. It should be retained for future reference. A
                      "Statement of Additional Information" containing
                      additional information about the Trust has been filed with
                      the Securities and Exchange Commission. This Statement is
                      dated April 28, 1995; revised September 15, 1995 and has
                      been incorporated by reference into this Prospectus. A
                      copy may be obtained without charge by writing to the
                      Trust or by calling the Investor Information Department.
    
--------------------------------------------------------------------------------
TABLE OF CONTENTS
 
<TABLE>
<S>                                         <C>                                         <C>
                                   Page                                         Page                                        Page
Highlights ........................  2      Implementation of Policies ......... 16               SHAREHOLDER GUIDE
Trust Expenses ....................  4      Investment Limitations ............. 22     Opening an Account and
Financial Highlights ..............  6      Management of the Trust ............ 22        Purchasing Shares ............... 28
Yield and Total Return ............ 10      Investment Adviser ................. 23     When Your Account Will
                                            Performance Record ................. 23        Be Credited ..................... 31
        TRUST INFORMATION                   Dividends, Capital Gains                    Selling Your Shares ................ 32
Investment Objectives ............. 10         and Taxes ....................... 24     Exchanging Your Shares ............. 34
Investment Policies ............... 12      The Share Price of Each Portfolio .. 26     Important Information About
Investment Risks .................. 14      General Information ................ 27        Telephone Transactions .......... 35
Who Should Invest ................. 15                                                  Transferring Registration .......... 35
                                                                                        Other Vanguard Services ............ 36
</TABLE>
 
--------------------------------------------------------------------------------
 
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION, NOR HAS THE SECURITIES
AND EXCHANGE COMMISSION OR ANY STATE COMMISSION PASSED UPON THE ACCURACY OR
ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL
OFFENSE.
--------------------------------------------------------------------------------
 
--------------------------------------------------------------------------------
<PAGE>   4
 
                                   HIGHLIGHTS
 
OBJECTIVE AND
POLICIES              The Trust is an open-end diversified investment company
                      designed as an "index" fund. Shares of the Trust are
                      offered on a no-load basis, although the Trust incurs
                      certain distribution expenses. The Trust consists of six
                      separate Portfolios, each of which invests in common
                      stocks in order to match the performance of a selected
                      market index. There is no assurance, however, that the
                      Trust will achieve its stated objective.           PAGE 10
--------------------------------------------------------------------------------
 
SIX SEPARATE
PORTFOLIOS            Investors may choose to invest in any of six Portfolios of
                      the Trust:
 
                      500 PORTFOLIO -- seeks to match the investment performance
                      of the Standard & Poor's 500 Composite Stock Price Index,
                      an index emphasizing large-capitalization stocks.
 
                      EXTENDED MARKET PORTFOLIO -- seeks to match the investment
                      performance of the Wilshire 4500 Index, an index
                      consisting of medium- and small-capitalization stocks.
 
                      TOTAL STOCK MARKET PORTFOLIO -- seeks to match the
                      investment performance of the Wilshire 5000 Index, an
                      index consisting of all regularly and publicly traded U.S.
                      stocks.
 
                      SMALL CAPITALIZATION STOCK PORTFOLIO -- seeks to match the
                      investment performance of the Russell 2000 Small Stock
                      Index, an index consisting of 2,000 small-capitalization
                      common stocks.
 
                      VALUE PORTFOLIO -- seeks to match the investment
                      performance of the S&P/BARRA Value Index, an index
                      consisting of stocks selected from the Standard & Poor's
                      500 Index with lower than average ratios of market price
                      to book value.
 
                      GROWTH PORTFOLIO -- seeks to match the investment
                      performance of the S&P/BARRA Growth Index, an index
                      consisting of stocks selected from the Standard & Poor's
                      500 Index with higher than average ratios of market price
                      to book value.                                     PAGE 12
--------------------------------------------------------------------------------
 
RISK
CHARACTERISTICS       As mutual funds investing in common stocks, all six
                      Portfolios of the Trust are subject to market risk, which
                      is the possibility that common stock prices will decline,
                      sometimes substantially, over short or extended periods.
                      Due to differences in the securities they hold, the six
                      Portfolios may exhibit varying levels of volatility.  
                                                                         PAGE 14
--------------------------------------------------------------------------------
 
THE VANGUARD
GROUP                 The Trust is a member of The Vanguard Group of Investment
                      Companies, a group of more than 30 investment companies
                      with more than 80 distinct investment portfolios and total
                      assets in excess of $130 billion. The Vanguard Group, Inc.
                      ("Vanguard"), a subsidiary jointly owned by the Vanguard
                      Funds, provides all corporate management, administrative,
                      distribution and shareholder accounting services on an
                      at-cost basis to the Funds in the Group.           PAGE 22
--------------------------------------------------------------------------------
 
INVESTMENT
ADVISER               The Trust receives investment advisory services on an
                      at-cost basis from Vanguard's Core Management Group. As a
                      result, the Trust receives its investment advisory
                      services at a substantially lower cost than would be
                      possible if the Trust paid an investment advisory fee to
                      an external investment adviser.                    PAGE 23
--------------------------------------------------------------------------------
 
                                        2
<PAGE>   5
 
   
FEES AND EXPENSES     A portfolio transaction fee of 1% is deducted from
                      purchases of the Small Capitalization Stock Portfolio; a
                      0.5% portfolio transaction fee is deducted from purchases
                      of the Extended Market Portfolio; and a 0.25% portfolio
                      transaction fee is deducted from purchases of the Total
                      Stock Market Portfolio. Portfolio transaction fees are
                      paid to the Portfolios to offset transaction costs of
                      buying securities of small- and medium-sized companies.
                      Shareholders in each Portfolio will also incur a $10
                      annual account maintenance fee deducted from the
                      Portfolio's dividend. This fee will be waived for
                      shareholders with an account balance of $10,000 or
                      more.                                               PAGE 4
    
--------------------------------------------------------------------------------
 
DIVIDEND POLICY       The Trust distributes substantially all of its net
                      investment income in the form of dividends. The 500, Total
                      Stock Market, Value and Growth Portfolios distribute
                      dividends quarterly, whereas the Extended Market and Small
                      Capitalization Stock Portfolios distribute dividends
                      annually. In all six Portfolios, net capital gains, if
                      any, are distributed annually.                     PAGE 24
--------------------------------------------------------------------------------
 
TAXES                 A sale of shares of a Portfolio is a taxable event and may
                      result in a capital gain or loss. Dividend distributions,
                      capital gain distributions, and capital gains or losses
                      from redemptions and exchanges may be subject to federal,
                      state and local taxes.                             PAGE 24
--------------------------------------------------------------------------------
 
PURCHASING
SHARES                You may purchase shares by mail, wire or written exchange
                      request from another Vanguard Fund. The minimum initial
                      investment is $3,000 per Portfolio ($500 for Individual
                      Retirement Accounts and Uniform Gifts/Transfers to Minors
                      Act accounts); the minimum for subsequent investments is
                      $100. There are no sales commissions or 12b-1 fees.
                      Telephone exchanges from other Vanguard Funds are not
                      permitted.                                         PAGE 28
--------------------------------------------------------------------------------
 
SELLING SHARES        You may redeem shares of each Portfolio in writing or by
                      telephone; however, telephone exchanges into other
                      Vanguard Funds are not permitted (except for certain
                      retirement accounts). The share price of each Portfolio is
                      expected to fluctuate, and may at redemption be more or 
                      less than at the time of initial purchase, resulting in 
                      a gain or loss.                                    PAGE 32
--------------------------------------------------------------------------------
 
OTHER VANGUARD
SERVICES              The Trust offers special services: Fund Express, for
                      electronic transfers between the Fund and your bank
                      account; and Tele-Account, for 24-hour telephone access to
                      your Fund account balance and certain transactions. 
                                                                         PAGE 36
--------------------------------------------------------------------------------
 
SPECIAL
CONSIDERATIONS        (1) Each Portfolio may invest a portion of its assets in
                          futures contracts, options, convertible securities &
                          swap agreements.                               PAGE 20
 
                      (2) Each Portfolio may invest in short-term fixed income
                          securities.                                    PAGE 20
 
                      (3) Each Portfolio may lend its securities.        PAGE 21
 
                      (4) Each Portfolio may borrow money.               PAGE 22
--------------------------------------------------------------------------------
 
                                        3
<PAGE>   6
 
TRUST EXPENSES        The following table illustrates ALL expenses and fees that
                      you would incur as a shareholder of the Trust. The
                      expenses and fees are for the fiscal year ended December
                      31, 1994.
 
<TABLE>
<CAPTION>
                                                                          TOTAL                                    SMALL
                                SHAREHOLDER                 EXTENDED      STOCK                                CAPITALIZATION
                                TRANSACTION       500        MARKET      MARKET        VALUE       GROWTH          STOCK
                                 EXPENSES      PORTFOLIO    PORTFOLIO   PORTFOLIO    PORTFOLIO    PORTFOLIO      PORTFOLIO+
                              <S>              <C>          <C>         <C>          <C>          <C>          <C>            
                              ------------------------------------------------------------------------------------------
                              Sales Load
                                Imposed
                                on
                                Purchases....       None        None***      None**       None         None             None*
                              Sales Load
                                Imposed on
                                Reinvested
                                Dividends....       None        None         None         None         None              None
                              Redemption
                                Fees.........       None        None         None         None         None              None
                              Exchange
                                Fees.........       None        None         None         None         None              None
</TABLE>
 
                        * Shareholders are charged a 1% portfolio transaction
                          fee, payable directly to the Portfolio, on each
                          purchase of shares.
                       ** Shareholders are charged a 0.25% portfolio transaction
                          fee, payable directly to the Portfolio, on each
                          purchase of shares.
                      *** Shareholders are charged a 0.5% portfolio transaction
                          fee, payable directly to the Portfolio, on each
                          purchase of shares.
                       + Formerly Vanguard Small Capitalization Stock Fund, Inc.
 
<TABLE>
<CAPTION>
                                                                              TOTAL                                    SMALL
                                 ANNUAL FUND                    EXTENDED      STOCK                                CAPITALIZATION
                                  OPERATING           500        MARKET      MARKET        VALUE       GROWTH          STOCK
                                   EXPENSES        PORTFOLIO    PORTFOLIO   PORTFOLIO    PORTFOLIO    PORTFOLIO      PORTFOLIO+
                              <S>                  <C>          <C>         <C>          <C>          <C>          <C>
                              ------------------------------------------------------------------------------------------
                              Management &
                                Administrative
                                Expenses++......       0.16%       0.15%        0.14%        0.14%        0.07%             0.12%
                              Investment
                                Advisory Fees...        0.00        0.01         0.01         0.01         0.06              0.01
                              12b-1 Fees........        None        None         None         None         None              None
                              Other Expenses
                                Distribution
                                  Costs.........        0.02        0.02         0.02         0.02         0.02              0.02
                                Miscellaneous
                                  Expenses......        0.01        0.02         0.03         0.03         0.05              0.02
                                                       -----       -----        -----        -----        -----             -----
                              Total Other
                                Expenses........        0.03        0.04         0.05         0.05         0.07              0.04
                                                       -----       -----        -----        -----        -----             -----
                                  TOTAL
                                    OPERATING
                                    EXPENSES....       0.19%       0.20%        0.20%        0.20%        0.20%             0.17%
                                                       -----       -----        -----        -----        -----             -----
                                                       -----       -----        -----        -----        -----             -----
</TABLE>
 
                       + Formerly Vanguard Small Capitalization Stock Fund, Inc.
                      ++ In addition to these costs, each Portfolio assesses an
                         annual account maintenance fee of $10. This fee will be
                         waived for shareholders with an account balance of
                         $10,000 or more.
 
                      The purpose of this table is to assist you in
                      understanding the various costs and expenses that you
                      would bear directly or indirectly as an investor in the
                      Trust.
 
THREE PORTFOLIOS ASSESS
TRANSACTION FEES      The Small Capitalization Stock Portfolio assesses a
                      portfolio transaction fee on purchases of Portfolio shares
                      equal to 1% of the dollar amount invested; the Extended
                      Market Portfolio assesses a portfolio transaction fee
                      equal to 0.5% of the dollar amount invested; and the Total
                      Stock Market Portfolio assesses a portfolio transaction
                      fee equal to 0.25% of the dollar amount invested. The
                      portfolio transaction fees are paid to the respective
                      Portfolio, not to Vanguard. They are not sales charges.
 
                                        4
<PAGE>   7
 
                      These fees apply to initial investments in the Extended
                      Market, Small Capitalization Stock and Total Stock Market
                      Portfolios and all subsequent purchases (including
                      purchases made by exchange from another Vanguard Fund or
                      from the other Portfolios of the Trust), but not to
                      reinvested dividend or capital gains distributions.
                      Portfolio transaction fees are deducted automatically from
                      the amount invested; they cannot be paid separately.
 
                      The purpose of these transaction fees is to allocate
                      transaction costs associated with new purchases to
                      investors making those purchases, thus insulating existing
                      shareholders from those transaction costs. These costs
                      include: (1) brokerage costs; (2) market impact
                      costs -- i.e., the increase in market prices which may
                      result when the Portfolio purchases thinly traded stocks;
                      and, most importantly, (3) the effect of the "bid-ask"
                      spread in the over-the-counter market. (Securities in the
                      over-the-counter market are bought at the "ask" or
                      purchase price, but are valued in the Portfolio at the
                      mean of the "bid," or sale, and "ask" prices.)
 
                      The 1%, 0.5% and 0.25% fees represent Vanguard's estimate
                      of the brokerage and other transaction costs incurred by
                      the Small Capitalization Stock, Extended Market and Total
                      Stock Market Portfolios in acquiring stocks of mid- and
                      small-capitalization companies. Without the fees, the
                      three Portfolios, which incur these costs directly, would
                      experience reduced investment performance for all
                      shareholders in each Portfolio. With the fees, the
                      transaction costs of acquiring additional stocks are borne
                      not by all existing shareholders, but by those investors
                      making additional purchases. Because the purchaser, not
                      the Portfolios, bears these costs, the Portfolios are
                      expected to track their respective benchmark indexes more
                      closely.
 
   
500 PORTFOLIO         The Portfolio reserves the right to deduct a portfolio
                      transaction fee, ranging from 0.10% to 0.25%, from
                      purchases of shares of the Portfolio, if such purchase or
                      cumulative purchases are of a size that is reasonably
                      deemed to be disruptive to efficient portfolio management.
                      The fee will be paid to the Portfolio to offset
                      transaction costs of buying securities. The fee is not
                      paid to Vanguard and is not a sales charge. It is not
                      expected that the 500 Portfolio would deduct a portfolio
                      transaction fee on amounts of less than $10 million.
    
 
EACH PORTFOLIO CHARGES
A $10 ACCOUNT
MAINTENANCE FEE       Each Portfolio assesses an annual account maintenance fee
                      of $10 to allocate part of the fixed costs of maintaining
                      shareholder accounts equally to all accounts. This fee is
                      deducted from each Portfolio's dividend at a rate of $2.50
                      per quarter for accounts in the 500, Total Stock Market,
                      Value and Growth Portfolios, and $10 annually for accounts
                      in the Extended Market and Small Capitalization Stock
                      Portfolios. See "Dividends, Capital Gains and Taxes" for
                      more information on this fee. The $10 fee amounts to 1.00%
                      on a $1,000 investment in a Portfolio of the Trust and
                      0.33% on a $3,000 investment. This fee will be waived for
                      shareholders with an account balance of $10,000 or more.
 
                      The following example illustrates the expenses that you
                      would incur on a $1,000 investment over various time
                      periods, assuming (1) a 5% annual rate of return and (2)
                      redemption at the end of each period. The example includes
                      the $10 account maintenance fee for each Portfolio; the 1%
                      portfolio transaction fee for the Small
 
                                        5
<PAGE>   8
 
                      Capitalization Stock Portfolio; the 0.5% transaction fee
                      for the Extended Market Portfolio; and the 0.25%
                      transaction fee for the Total Stock Market Portfolio. As
                      noted in the table on the previous page, the Trust charges
                      no redemption fees of any kind.
 
<TABLE>
<CAPTION>
                                                              1 YEAR    3 YEARS    5 YEARS    10 YEARS
                                                              -------   --------   --------   ---------
                        <S>                                   <C>       <C>        <C>        <C>
                        500 Portfolio.......................    $12       $ 36       $ 60       $ 123
                        Extended Market Portfolio...........    $17       $ 41       $ 66       $ 129
                        Total Stock Market Portfolio........    $15       $ 39       $ 63       $ 127
                        Growth Portfolio....................    $12       $ 36       $ 61       $ 124
                        Value Portfolio.....................    $12       $ 36       $ 61       $ 124
                        Small Capitalization Stock
                          Portfolio.........................    $22       $ 45       $ 69       $ 131
</TABLE>
 
                      Included in these estimates are account maintenance fees
                      of $10, $30, $50 and $100 for the respective periods
                      shown. Accordingly, for investments larger than $1,000,
                      your total expenses will be substantially lower in
                      percentage terms than this illustration implies.
 
                      THIS EXAMPLE SHOULD NOT BE CONSIDERED A REPRESENTATION OF
                      PAST OR FUTURE EXPENSES OR PERFORMANCE. ACTUAL EXPENSES
                      MAY BE HIGHER OR LOWER THAN THOSE SHOWN.
--------------------------------------------------------------------------------
 
FINANCIAL
HIGHLIGHTS            The following financial highlights for a share outstanding
                      throughout each period, insofar as they relate to each of
                      the five years ended December 31, 1994, have been audited
                      by Price Waterhouse LLP, independent accountants, whose
                      reports thereon were unqualified. This financial
                      information should be read in conjunction with the Trust's
                      financial statements and notes thereto, which are
                      incorporated by reference in the Statement of Additional
                      Information and in this Prospectus, and which appear,
                      along with the reports of Price Waterhouse LLP, in the
                      Trust's 1994 Annual Report to Shareholders and inserts
                      thereto. For a more complete discussion of the Trust's
                      performance, please see the Trust's 1994 Annual Report to
                      Shareholders, which may be obtained free of charge by
                      writing to the Trust or calling our Investor Information
                      Department at 1-800-662-7447.
 
                                        6
<PAGE>   9
 
<TABLE>
<CAPTION>
                   -----------------------------------------------------------------------------------------------------
                                                           500 PORTFOLIO
                   -----------------------------------------------------------------------------------------------------
                                                      YEAR ENDED DECEMBER 31,
                   -----------------------------------------------------------------------------------------------------
                    1994       1993       1992       1991       1990       1989       1988       1987       1986       1985
------------------------------------------------------------------------------------------------------------------------
<S>                <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>     
NET ASSET VALUE,
  BEGINNING OF
  YEAR..........    $43.83     $40.97     $39.32     $31.24     $33.64     $27.18     $24.65     $24.27     $22.99     $19.52
                    ------     ------     ------     ------     ------     ------     ------     ------     ------     ------
INVESTMENT
  OPERATIONS
  Net Investment
  Income........      1.18       1.13       1.12       1.15       1.17       1.20       1.08        .88        .89        .91
  Net Realized
    and
    Unrealized
    Gain (Loss)
    on
    Investments.      (.67)      2.89       1.75       8.20      (2.30)      7.21       2.87        .36       3.30       5.08
                    ------     ------     ------     ------     ------     ------     ------     ------     ------     ------
    TOTAL FROM
      INVESTMENT
      OPERATIONS       .51       4.02       2.87       9.35      (1.13)      8.41       3.95       1.24       4.19       5.99
------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
  Dividends from
    Net
    Investment
    Income......     (1.17)     (1.13)     (1.12)     (1.15)     (1.17)     (1.20)     (1.10)      (.69)      (.89)      (.91)
  Distributions
    from
    Realized
    Capital
    Gains.......      (.20)      (.03)      (.10)      (.12)      (.10)      (.75)      (.32)      (.17)     (2.02)     (1.61)
                    ------     ------     ------     ------     ------     ------     ------     ------     ------     ------
    TOTAL
    DISTRIBUTIONS    (1.37)     (1.16)     (1.22)     (1.27)     (1.27)     (1.95)     (1.42)      (.86)     (2.91)     (2.52)
------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE,
  END OF YEAR...    $42.97     $43.83     $40.97     $39.32     $31.24     $33.64     $27.18     $24.65     $24.27     $22.99
------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------
TOTAL RETURN*...      1.18%      9.89%      7.42%     30.22%     (3.32)%    31.36%     16.22%      4.71%     18.06%     31.23%
------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------
RATIOS/SUPPLEMENTAL
  DATA
Net Assets, End
  of Year
  (Millions)....    $9,356     $8,273     $6,547     $4,345     $2,173     $1,804     $1,055       $826       $485       $394
Ratio of
  Expenses to
  Average Net
  Assets........       .19%       .19%       .19%       .20%       .22%       .21%       .22%       .26%       .28%       .28%
Ratio of Net
  Investment
  Income to
  Average Net
  Assets........      2.72%      2.65%      2.81%      3.07%      3.60%      3.62%      4.08%      3.15%      3.40%      4.09%
Portfolio
  Turnover
  Rate..........         6%+        6%+        4%+        5%+       23%+        8%        10%        15%        29%        36%
</TABLE>
 
* Total return figures do not reflect the annual account maintenance fee of $10.
 
+ Portfolio turnover rates excluding in-kind redemptions were 4%, 2%, 1%, 1% and
  6%, respectively.
 
<TABLE>
<CAPTION>
                                         -------------------------------------------------------------------------
                                                            EXTENDED MARKET PORTFOLIO
                                         -------------------------------------------------------------------------
                                                             YEAR ENDED DECEMBER 31,
                                         ------------------------------------------------------------
                                                                                                                      DEC. 21.+
                                          1994      1993       1992       1991       1990       1989       1988      TO 31, 1987
------------------------------------------------------------------------------------------------------------------------
<S>                                      <C>       <C>        <C>        <C>        <C>        <C>        <C>        <C>
NET ASSET VALUE, BEGINNING OF PERIOD...   $19.43    $17.35     $15.82     $11.48     $13.92     $11.60      $9.99       $10.00
                                          ------    ------     ------     ------     ------     ------     ------    ---------
INVESTMENT OPERATIONS
  Net Investment Income................      .28       .23        .24        .25        .30        .26        .34          .03
  Net Realized and Unrealized Gain
    (Loss) on Investments..............     (.62)     2.28       1.72       4.54      (2.25)      2.52       1.63         (.04)
                                          ------    ------     ------     ------     ------     ------     ------    ---------
    TOTAL FROM INVESTMENT OPERATIONS...     (.34)     2.51       1.96       4.79      (1.95)      2.78       1.97         (.01)
------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
  Dividends from Net Investment
    Income.............................     (.28)     (.23)      (.25)      (.25)      (.33)      (.23)      (.20)          --
  Distributions from Realized Capital
    Gains..............................     (.29)     (.20)      (.18)      (.20)      (.16)      (.23)      (.16)          --
                                          ------    ------     ------     ------     ------     ------     ------    ---------
    TOTAL DISTRIBUTIONS................     (.57)     (.43)      (.43)      (.45)      (.49)      (.46)      (.36)          --
------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD.........   $18.52    $19.43     $17.35     $15.82     $11.48     $13.92     $11.60        $9.99
------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------
TOTAL RETURN*..........................    (1.76)%   14.49%     12.47%     41.85%    (14.05)%    24.10%     19.75%       (0.10)%
------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Period (Millions)...     $967      $928       $585       $372       $179       $147        $35           $5
Ratio of Expenses to Average Net
  Assets...............................      .20%      .20%       .20%       .19%       .23%       .23%       .24%           0%
Ratio of Net Investment Income to
  Average Net Assets...................     1.51%     1.48%      1.73%      2.14%      2.68%      2.92%      2.90%           0%
Portfolio Turnover Rate................       19%       13%         9%        11%         9%        14%        26%           3%
</TABLE>
 
* Total return figures do not reflect the annual account maintenance fee of $10
  or applicable portfolio transaction fees.
+ Commencement of operations.
 
                                        7
<PAGE>   10
 
<TABLE>
<CAPTION>
                                                                     --------------------------------------------------
                                                                                TOTAL STOCK MARKET PORTFOLIO
                                                                     --------------------------------------------------
                                                                     YEAR ENDED DECEMBER 31,          MARCH 16+, 1992,
                                                                     1994               1993        TO DECEMBER 31, 1992
<S>                                                                 <C>                <C>          <C>                  
------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, BEGINNING OF PERIOD..............................  $11.69             $10.84              $10.00
                                                                    ------             ------       -------------
INVESTMENT OPERATIONS
  Net Investment Income...........................................     .27                .26                 .23
  Net Realized and Unrealized Gain (Loss) on Investments..........    (.29)               .88                 .84
                                                                    ------             ------       -------------
    TOTAL FROM INVESTMENT OPERATIONS..............................    (.02)              1.14                1.07
------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
  Dividends from Net Investment Income............................    (.27)              (.26)               (.23)
  Distributions from Realized Capital Gains.......................    (.03)              (.03)                 --
                                                                    ------             ------       -------------
    TOTAL DISTRIBUTIONS...........................................    (.30)              (.29)               (.23)
------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD....................................  $11.37             $11.69              $10.84
------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------
TOTAL RETURN**....................................................   (0.17)%            10.62%              10.41%
------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Period (Millions)..............................    $786               $512                $275
Ratio of Expenses to Average Net Assets...........................     .20%               .20%                .21%*
Ratio of Net Investment Income to Average Net Assets..............    2.35%              2.31%               2.42%*
Portfolio Turnover Rate...........................................       2%                 1%                  3%
</TABLE>
 
 * Annualized.
** Total return figures do not reflect the annual account maintenance fee of $10
   or applicable portfolio transaction fees.
 + Commencement of operations.
 
<TABLE>
<CAPTION>
                                                                     --------------------------------------------------
                                                                                      GROWTH PORTFOLIO
                                                                     --------------------------------------------------
                                                                     YEAR ENDED DECEMBER 31,         NOVEMBER 2+, 1992,
                                                                     1994               1993        TO DECEMBER 31, 1992
<S>                                                                 <C>                <C>          <C>                  
------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, BEGINNING OF PERIOD..............................  $10.20             $10.26              $10.00
                                                                    ------             ------       -------------
INVESTMENT OPERATIONS
  Net Investment Income...........................................     .21                .21                 .06
  Net Realized and Unrealized Gain (Loss) on Investments..........     .08               (.06)                .26
                                                                    ------             ------       -------------
    TOTAL FROM INVESTMENT OPERATIONS..............................     .29                .15                 .32
------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
  Dividends from Net Investment Income............................    (.21)              (.21)               (.06)
  Distributions from Realized Capital Gains.......................      --                 --                  --
                                                                    ------             ------       -------------
    TOTAL DISTRIBUTIONS...........................................    (.21)              (.21)               (.06)
------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD....................................  $10.28             $10.20              $10.26
------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------
TOTAL RETURN**....................................................    2.89%              1.53%               3.19%
------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Period (Millions)..............................     $86                $51                 $21
Ratio of Expenses to Average Net Assets...........................     .20%               .20%                  0%*
Ratio of Net Investment Income to Average Net Assets..............    2.08%              2.10%               2.85%*
Portfolio Turnover Rate...........................................      28%                36%                  2%
</TABLE>
 
 * Annualized.
** Total return figures do not reflect the annual account maintenance fee of
   $10.
 + Commencement of operations.
 
                                        8
<PAGE>   11
 
<TABLE>
<CAPTION>
                                                                     --------------------------------------------------
                                                                                      VALUE PORTFOLIO
                                                                     --------------------------------------------------
                                                                     YEAR ENDED DECEMBER 31,         NOVEMBER 2+, 1992,
                                                                     1994               1993        TO DECEMBER 31, 1992
<S>                                                                 <C>                <C>          <C>                  
------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, BEGINNING OF PERIOD..............................  $11.74             $10.30              $10.00
                                                                    ------             ------       -------------
INVESTMENT OPERATIONS
  Net Investment Income...........................................     .38                .38                 .07
  Net Realized and Unrealized Gain (Loss) on Investments..........    (.46)              1.50                 .30
                                                                    ------             ------       -------------
    TOTAL FROM INVESTMENT OPERATIONS..............................    (.08)              1.88                 .37
------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
  Dividends from Net Investment Income............................    (.38)              (.38)               (.07)
  Distributions from Realized Capital Gains.......................    (.16)              (.06)                 --
                                                                    ------             ------       -------------
    TOTAL DISTRIBUTIONS...........................................    (.54)              (.44)               (.07)
------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD....................................  $11.12             $11.74              $10.30
------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------
TOTAL RETURN**....................................................   (0.73)%            18.35%               3.70%
------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Period (Millions)..............................    $297               $190                 $24
Ratio of Expenses to Average Net Assets...........................     .20%               .20%                  0%*
Ratio of Net Investment Income to Average Net Assets..............    3.37%              3.26%               3.46%*
Portfolio Turnover Rate...........................................      32%                30%                  4%
</TABLE>
 
 * Annualized.
** Total return figures do not reflect the annual account maintenance fee of
   $10.
 + Commencement of operations.
<TABLE>
<CAPTION>
 
                                       ----------------------------------------------------------------------------------------
                                                                SMALL CAPITALIZATION STOCK PORTFOLIO*
                                      ----------------------------------------------------------------------------------------
                                     FEB. 1 TO  OCT. 1, 1993                        YEAR ENDED SEPTEMBER 30,
                                     DEC. 31,   TO JAN. 31,    -----------------------------------------------------------------
                                       1994         1994        1993      1992      1991     1990(1)    1989+      1988      1987
-----------------------------------------------------------------------------------------------------------------------    
<S>                                    <C>        <C>          <C>       <C>       <C>       <C>        <C>       <C>       <C>
NET ASSET VALUE, BEGINNING OF                                
 PERIOD..............................   $16.24     $16.23      $12.63    $12.03     $8.55     $11.88    $11.96     $15.73   $13.24
                                      -------   ---------      ------    ------    ------     ------    ------     ------   ------
INVESTMENT OPERATIONS                                        
 Net Investment Income (Loss)........      .20        .05         .20       .19       .20        .17       .10        .03     (.04)
 Net Realized and Unrealized Gain                            
   (Loss) on Investments.............     (.86)       .96        3.73       .88      3.60      (3.46)     2.13      (2.59)    4.42
                                       ------    --------       -----     -----     -----      -----     -----      -----    -----
   TOTAL FROM INVESTMENT                                     
     OPERATIONS......................     (.66)      1.01        3.93      1.07      3.80      (3.29)     2.23      (2.56)    4.38
-----------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS                                                
 Dividends from Net Investment                               
   Income............................     (.22)      (.18)       (.18)     (.18)     (.18)      (.04)    (.14)         --       --
 Distributions from Realized Capital                         
   Gains.............................     (.37)      (.82)       (.15)     (.29)     (.14)        --     (2.17)     (1.21)   (1.89)
                                       ------    --------       -----     -----     -----      -----     -----      -----    -----
   TOTAL DISTRIBUTIONS...............     (.59)     (1.00)       (.33)     (.47)     (.32)      (.04)    (2.31)     (1.21)   (1.89)
-----------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD.......   $14.99     $16.24      $16.23    $12.63    $12.03      $8.55    $11.88     $11.96   $15.73
-----------------------------------------------------------------------------------------------------------------------
-----------------------------------------------------------------------------------------------------------------------
TOTAL RETURN++.......................    (4.00)%     6.65%      31.60%     9.34%    45.91%    (27.73)%   18.83%    (14.30)%  38.02%
-----------------------------------------------------------------------------------------------------------------------
-----------------------------------------------------------------------------------------------------------------------
RATIOS/SUPPLEMENTAL DATA                                     
Net Assets, End of Period                                    
 (Millions)..........................     $605       $533        $432      $202      $111        $40       $20        $27      $35
Ratio of Expenses to Average Net                             
 Assets..............................      .17%**     .18%**      .18%      .18%      .21%       .31%     1.00%       .95%     .92%
Ratio of Net Investment Income (Loss)                        
 to Average Net Assets...............     1.50%**    1.16%**     1.47%     1.65%     2.11%      1.91%      .65%       .24%    (.25%)
Portfolio Turnover Rate..............       25%         5%         26%       26%       33%        40%      160%        68%      92%
                                                             
<CAPTION>
                             -------------------------------------
                             SMALL CAPITALIZATION STOCK PORTFOLIO*
                             -------------------------------------
                                    YEAR ENDED SEPTEMBER 30,      
                             -------------------------------------
                                       1986      1985             
------------------------------------------------------------------
<S>                                  <C>       <C>                
NET ASSET VALUE, BEGINNING OF
 PERIOD..............................  $11.68     $13.15
                                       ------     ------
INVESTMENT OPERATIONS
 Net Investment Income (Loss)........    (.01)      (.04)
 Net Realized and Unrealized Gain
   (Loss) on Investments.............    1.57       (.51)
                                        -----      -----
   TOTAL FROM INVESTMENT
     OPERATIONS......................    1.56       (.55)
-------------------------------------
DISTRIBUTIONS
 Dividends from Net Investment
   Income............................      --       (.15)
 Distributions from Realized Capital
   Gains.............................      --       (.77)
                                        -----      -----
   TOTAL DISTRIBUTIONS...............      --       (.92)
-------------------------------------
NET ASSET VALUE, END OF PERIOD.......  $13.24     $11.68
-------------------------------------
-------------------------------------
TOTAL RETURN++.......................   13.33%     (3.67)%
-------------------------------------
-------------------------------------
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Period
 (Millions)..........................     $31        $32
Ratio of Expenses to Average Net
 Assets..............................     .92%      1.00%
Ratio of Net Investment Income (Loss)
 to Average Net Assets...............    (.06%)     (.28%)
Portfolio Turnover Rate..............      92%       103%
</TABLE>
 
(1) Adjusted to reflect a 3-for-1 stock split as of February 3, 1990.
 * Results prior to January 31, 1994, are for the former Vanguard Small
   Capitalization Stock Fund.
** Annualized.
 + Prior to September 11, 1989, Schroder Capital Management International
   provided investment advisory services to the Fund. Effective September 11,
   1989, The Vanguard Group, Inc. began providing investment advisory services
   to the Fund on an at-cost basis.
++ Total return figures do not reflect the annual account maintenance fees of
   $10 or applicable portfolio transaction fees.
 
--------------------------------------------------------------------------------
 
                                        9
<PAGE>   12
 
YIELD AND
TOTAL RETURN          From time to time a Portfolio of the Trust may advertise
                      its yield and total return. Both yield and total return
                      figures are based on historical earnings and are not
                      intended to indicate future performance. The "total
                      return" of a Portfolio refers to the average annual
                      compounded rates of return over one-, five- and ten-year
                      periods or for the life of the Portfolio (as stated in the
                      advertisement) that would equate an initial amount
                      invested at the beginning of a stated period to the ending
                      redeemable value of the investment, assuming the
                      reinvestment of all dividend and capital gains
                      distributions.
 
                      In accordance with industry guidelines set forth by the
                      U.S. Securities and Exchange Commission, the "30-day
                      yield" of a Portfolio is calculated by dividing the net
                      investment income per share earned during a 30-day period
                      by the net asset value per share on the last day of the
                      period. Net investment income includes interest and
                      dividend income earned on a Portfolio's securities; it is
                      net of all expenses and all recurring and nonrecurring
                      charges that have been applied to all shareholder
                      accounts. The yield calculation assumes that net
                      investment income earned over 30 days is compounded
                      monthly for six months and then annualized. Methods used
                      to calculate advertised yields are standardized for all
                      stock and bond mutual funds. However, these methods differ
                      from the accounting methods used by a Portfolio to
                      maintain its books and records, and so the advertised
                      30-day yield may not fully reflect the income paid to your
                      own account.
 
                      Additionally, the Portfolios may compare their performance
                      to that of their comparative indexes. The target
                      benchmarks include the Standard & Poor's 500 Composite
                      Stock Price Index, the Wilshire 4500 Index, the Wilshire
                      5000 Index, the Russell 2000 Small Stock Index, the
                      S&P/BARRA Value Index and the S&P/BARRA Growth Index.
--------------------------------------------------------------------------------
 
INVESTMENT
OBJECTIVES
EACH PORTFOLIO SEEKS
TO MATCH THE
INVESTMENT
PERFORMANCE OF ITS
RESPECTIVE INDEX      The Trust is an open-end diversified investment company
                      designed as an "index" fund. The Trust consists of six
                      Portfolios, each of which seeks to provide investment
                      results that correspond to a particular stock market
                      index. The correlation between the performance of each of
                      the Trust's Portfolios and the respective index that each
                      Portfolio attempts to match is expected to be at least
                      0.95. The 500, Extended Market, Total Stock Market and
                      Small Capitalization Stock Portfolios attempt to replicate
                      the investment performance of broad market indexes, while
                      the Value and Growth Portfolios attempt to replicate
                      indexes which possess certain "value" and "growth"
                      investment characteristics.
 
                                       10
<PAGE>   13
 
                      The pie chart below illustrates how, as measured by market
                      capitalization, the Standard & Poor's 500 Index, the
                      Wilshire 4500 Index and the Russell 2000 Index cover the
                      entire U.S. equity market, as represented by the Wilshire
                      5000 Index:
 
                          Total U.S. Equity Market/Wilshire 5000 Index*
                                     as of December 31, 1994
                                       
                                       
                                  Total Stock Market Portfolio
                                       
                                           [PIE CHART]
                                                                          
                                  500 Portfolio    S&P 500 INDEX 70%           
                      Extended Market Portfolio    WILSHIRE 4500 INDEX 30%     
           Small Capitalization Stock Portfolio    RUSSELL 2000 INDEX (9%)     

                      *Wilshire 500 excludes Royal Dutch Shell and Unilever,
                       N.V. which make up approximately 2.3% of the S&P 500
                       Index.    
 
                      - The 500 PORTFOLIO seeks to replicate the aggregate price
                        and yield performance of the Standard & Poor's 500
                        Composite Stock Price Index (the "S&P 500 Index"), an
                        index which emphasizes large-capitalization companies.
 
                      - The EXTENDED MARKET PORTFOLIO seeks to replicate the
                        aggregate price and yield performance of the Wilshire
                        4500 Index, an index which consists of more than 5,000
                        medium- and small-capitalization companies that are not
                        included in the S&P 500 Index.
 
                      - The TOTAL STOCK MARKET PORTFOLIO seeks to replicate the
                        aggregate price and yield performance of the Wilshire
                        5000 Index, an index which consists of all U.S. stocks
                        that trade on a regular basis on either the New York or
                        American Stock Exchange or the NASDAQ over-the-counter
                        market. These stocks include the large-capitalization
                        companies of the S&P 500 Index, with the exception of
                        Royal Dutch and Unilever, N.V., which trade on the New
                        York Stock Exchange as ADR's, as well as the medium-and
                        small-capitalization companies of the Wilshire 4500
                        Index.
 
                      - The SMALL CAPITALIZATION STOCK PORTFOLIO seeks to
                        replicate the aggregate price and yield performance of
                        the Russell 2000 Small Stock Index (the "Russell 2000"),
                        a broadly diversified small-capitalization stock index
                        consisting of approximately 2,000 common stocks.
 
                                       11
<PAGE>   14
 
                      The pie chart below illustrates how, as measured by market
                      capitalization, the S&P 500 Index is divided into the S&P/
                      BARRA Value and S&P/BARRA Growth Indexes.
 
                                  S&P 500 Index
                             as of December 31, 1994

                                  500 Portfolio

                                   [PIE CHART]

                      Growth Portfolio    S&P/BARRA GROWTH INDEX 50%
                       Value Portfolio    S&P/BARRA VALUE INDEX 50%
 
                      - The VALUE PORTFOLIO seeks to replicate the aggregate
                        price and yield performance of the S&P/BARRA Value
                        Index, an index which includes stocks in the S&P 500
                        Index with lower than average ratios of market price to
                        book value. These types of stocks are often referred to
                        as "value" stocks.
 
                      - The GROWTH PORTFOLIO seeks to replicate the aggregate
                        price and yield performance of the S&P/BARRA Growth
                        Index, an index which includes stocks in the S&P 500
                        Index with higher than average ratios of market price to
                        book value. These types of stocks are often referred to
                        as "growth" stocks.
 
                      There is no assurance that the Portfolios will achieve
                      their stated objectives.
 
                      These investment objectives are fundamental and so cannot
                      be changed without the approval of a majority of a
                      Portfolio's shareholders.
--------------------------------------------------------------------------------
 
INVESTMENT
POLICIES
ALL SIX PORTFOLIOS USE A
"PASSIVE" APPROACH TO
INVEST IN COMMON
STOCKS                The six Portfolios of the Trust are not managed according
                      to traditional methods of "active" investment management,
                      which involve the buying and selling of securities based
                      upon economic, financial and market analysis and
                      investment judgment. Instead, the Portfolios, utilizing a
                      "passive" or "indexing" investment approach, attempt to
                      duplicate the investment performance of their respective
                      indexes through statistical procedures. The Portfolios are
                      managed without regard to tax ramifications.
 
                      The 500 PORTFOLIO invests in all 500 stocks in the S&P 500
                      Index in approximately the same proportions as they are
                      represented in the Index.
 
                      The EXTENDED MARKET PORTFOLIO invests in a statistically
                      selected sample of the more than 5,000 stocks included in
                      the Wilshire 4500 Index. Typically, the Portfolio invests
                      in 1,400 to 1,700 stocks. Stocks are selected for
                      inclusion in the Portfolio based primarily on market
                      capitalization and industry weightings. The Portfolio is
 
                                       12
<PAGE>   15
 
                      constructed to have aggregate investment characteristics
                      similar to those of the Wilshire 4500 Index.
 
                      The TOTAL STOCK MARKET PORTFOLIO invests in a
                      statistically selected sample of the more than 6,000
                      stocks included in the Wilshire 5000 Index. Typically, the
                      Portfolio invests in approximately 1,700 stocks. Stocks
                      are selected for inclusion in the Portfolio based
                      primarily on market capitalization and industry
                      weightings. The Portfolio is constructed to have aggregate
                      investment characteristics similar to those of the
                      Wilshire 5000 Index.
 
                      The SMALL CAPITALIZATION STOCK PORTFOLIO invests in a
                      statistically selected sample of the approximately 2,000
                      stocks included in the Russell 2000 Index. Typically, the
                      Portfolio invests in approximately 1,000 stocks. Stocks
                      are selected for inclusion in the Portfolio based on their
                      contribution to the Portfolio's market capitalization,
                      industry weightings and other fundamental characteristics
                      such as price-earnings ratios, dividend yields,
                      price-to-book ratios and financial leverage. The stocks
                      held by the Portfolio are weighted to make the Portfolio's
                      aggregate investment characteristics similar to those of
                      the Russell 2000 Index as a whole.
 
                      The VALUE PORTFOLIO invests in all of the common stocks
                      included in the S&P/BARRA Value Index in approximately the
                      same proportions as they are represented in the Index. As
                      of December 31, 1994, the S&P/BARRA Value Index included
                      318 of the stocks that make up the S&P 500 Index, and 50%
                      of the total market value of the Index.
 
                      The GROWTH PORTFOLIO invests in all of the common stocks
                      included in the S&P/BARRA Growth Index in approximately
                      the same proportions as they are represented in the Index.
                      As of December 31, 1994, the S&P/BARRA Growth Index
                      included 182 of the stocks that make up the S&P 500 Index,
                      and 50% of the total market value of the Index.
 
ALL SIX PORTFOLIOS
ATTEMPT TO REMAIN
FULLY INVESTED        Each Portfolio attempts to remain fully invested in common
                      stocks. Under normal circumstances each Portfolio will
                      invest at least 95% of its assets in the common stocks of
                      its respective index and futures contracts and options.
                      Each Portfolio may invest in certain short-term fixed
                      income securities as cash reserves, although cash or cash
                      equivalents are normally expected to represent less than
                      1% of each Portfolio's assets. Each Portfolio may also
                      invest up to 20% of its assets in stock futures contracts
                      and options in order to invest uncommitted cash balances,
                      to maintain liquidity to meet shareholder redemptions, or
                      to minimize trading costs. The Portfolios will not invest
                      in cash reserves, futures contracts or options as part of
                      a temporary defensive strategy, such as lowering a
                      Portfolio's investment in common stocks to protect against
                      potential stock market declines. The Portfolios intend to
                      remain fully invested, to the extent practicable, in a
                      pool of securities which will duplicate the investment
                      characteristics of their respective indexes. See
                      "Implementation of Policies" for a description of these
                      and other investment practices of the Trust.
 
                                       13
<PAGE>   16
 
                      These investment policies are not fundamental and so may
                      be changed by the Board of Trustees without shareholder
                      approval. However, shareholders would be notified prior to
                      a material change in either.
--------------------------------------------------------------------------------
 
INVESTMENT
RISKS
EACH PORTFOLIO IS
SUBJECT TO MARKET RISK
                      As mutual funds investing primarily in common stocks, the
                      Portfolios of the Trust are subject to market
                      risk -- i.e., the possibility that common stock prices
                      will decline over short or even extended periods. The U.S.
                      stock market tends to be cyclical, with periods when stock
                      prices generally rise and periods when prices generally
                      decline.
 
                      To illustrate the volatility of stock prices, the
                      following table sets forth the extremes for stock market
                      returns as well as the average return for the period from
                      1926 to 1994, as measured by the S&P 500 Composite Stock
                      Price Index:
 
<TABLE>
<CAPTION>
                                                 U.S. STOCK MARKET RETURNS (1926-1994)
                                                            OVER VARIOUS TIME HORIZONS
                                          --------------------------------------------
                                          1 YEAR     5 YEARS     10 YEARS     20 YEARS
                                          ------     -------     --------     --------
                               <S>        <C>        <C>         <C>          <C>
                               Best       +53.9%      +23.9%       +20.1%       +16.9%
                               Worst      -43.3       -12.5        - 0.9        + 3.1
                               Average    +12.2       +10.2        +10.7        +10.7
</TABLE>
 
                      As shown, common stocks have provided annual total returns
                      (capital appreciation plus dividend income) averaging
                      +10.7% for all 10-year periods from 1926 to 1994. Average
                      return may not be useful for forecasting future returns in
                      any particular period, as stock returns are quite volatile
                      from year to year.
 
THE EXTENDED MARKET,
TOTAL STOCK MARKET AND
SMALL CAPITALIZATION
STOCK PORTFOLIOS MAY
EXHIBIT GREATER
VOLATILITY            Historically, medium- and small-capitalization stocks have
                      been more volatile in price than the larger-capitalization
                      stocks included in the S&P 500 Index. Among the reasons
                      for the greater price volatility of these securities are
                      the less certain growth prospects of smaller firms, the
                      lower degree of liquidity in the markets for such stocks,
                      and the greater sensitivity of medium- and small-size
                      companies to changing economic conditions. Besides
                      exhibiting greater volatility, medium- and small-size
                      company stocks may, to a degree, fluctuate independently
                      of larger company stocks. Medium- and small-size company
                      stocks may decline in price as large company stocks rise,
                      or rise in price as large company stocks decline. Medium-
                      and small-size company stocks constitute the investments
                      of the Extended Market Portfolio while the Small
                      Capitalization Stock Portfolio is composed primarily of
                      small-size company stocks. Investors in the Portfolios
                      should therefore expect that the Extended Market and Small
                      Capitalization Stock Portfolios will be more volatile
                      than, and may fluctuate independently of, the 500
                      Portfolio.
 
                      Similarly, medium- and small-size company stocks
                      constituted approximately 31% of the net assets of the
                      Total Stock Market Portfolio on December 31, 1994.
                      Investors in the Portfolio should therefore anticipate
                      somewhat greater price volatility in the Total Stock
                      Market Portfolio relative to the 500 Portfolio.
 
                                       14
<PAGE>   17
 
THE VALUE AND GROWTH
PORTFOLIOS MAY
FLUCTUATE
INDEPENDENTLY         Stocks that emphasize particular investment
                      characteristics, such as "value" and "growth," may
                      fluctuate divergently from the broad market as represented
                      by the S&P 500 Index, and may also demonstrate greater
                      volatility over short or extended periods relative to the
                      broad market.
 
                      The S&P/BARRA Value Index maintains a lower price-to-book
                      ratio and historically has had a higher yield than the S&P
                      500 Index, while the S&P/BARRA Growth Index maintains a
                      higher price-to-book and historically has had a lower
                      yield than the S&P 500 Index. Because of these investment
                      characteristics, the S&P/BARRA Value Index has exhibited
                      somewhat less short-term volatility than the S&P 500
                      Index, while the S&P/BARRA Growth Index has displayed
                      somewhat greater short-term volatility than the S&P 500
                      Index from 1975 through 1994. However, as stated above,
                      both Indexes may be more volatile than the S&P 500 Index
                      over short or extended periods. The Indexes have been in
                      existence since May, 1992. Historical performance data was
                      generated by BARRA by constructing the S&P/BARRA Value and
                      Growth Indexes from actual S&P 500 Index holdings.
--------------------------------------------------------------------------------
 
WHO SHOULD
INVEST
LONG-TERM INVESTORS
SEEKING A "PASSIVE"
APPROACH FOR INVESTING
IN COMMON STOCKS      All six Portfolios of the Trust are designed for long-term
                      investors seeking the advantages of a low-cost, "passive"
                      approach for investing in a diversified portfolio of
                      common stocks. Unlike other equity mutual funds, which
                      generally seek to "beat" stock market averages with
                      unpredictable results, all six Portfolios seek to "match"
                      their respective indexes and thus are expected to provide
                      a highly predictable return relative to their benchmarks.
 
                      Four Portfolios of the Trust provide a vehicle for
                      investing in a broad market index:
 
                      - The 500 PORTFOLIO is designed for investors seeking to
                        replicate the total return of the S&P 500 Index, an
                        index emphasizing large capitalization common stocks.
 
                      - The EXTENDED MARKET PORTFOLIO is designed for investors
                        seeking to replicate the total return of the Wilshire
                        4500 Index, an index consisting of small- and
                        medium-capitalization companies.
 
                      - The TOTAL STOCK MARKET PORTFOLIO is designed for
                        investors seeking to replicate the total return of the
                        Wilshire 5000 Index, an index consisting of all U.S.
                        stocks that trade on a regular basis on either the New
                        York or American Stock Exchange or the NASDAQ
                        over-the-counter market. The Total Stock Market
                        Portfolio will therefore reflect the performance of the
                        entire U.S. stock market.
 
                      - The SMALL CAPITALIZATION STOCK PORTFOLIO is designed for
                        investors seeking to replicate the total return of the
                        Russell 2000 Small Stock Index, an index consisting of
                        approximately 2,000 small-capitalization stocks.
 
                      Two Portfolios are designed for investors seeking to
                      emphasize certain investment characteristics while
                      continuing to utilize a "passive" investment approach:
 
                      - The VALUE PORTFOLIO is designed for investors seeking to
                        replicate the total return of the S&P/BARRA Value Index,
                        an index consisting of companies of the S&P 500 Index
                        with lower than average market price to book value
                        ratios. Such a "value-oriented" Portfolio may be
                        appropriate for more conservative stock market
 
                                       15
<PAGE>   18
 
                       investors who are seeking higher dividend income and
                       somewhat below average stock market volatility.
 
                      - The GROWTH PORTFOLIO is designed for investors seeking
                        to replicate the total return of the S&P/BARRA Growth
                        Index, an index consisting of companies of the S&P 500
                        Index with higher than average market price to book
                        value ratios. Such a "growth-oriented" Portfolio may be
                        appropriate for investors who have little need for
                        current dividend income and who can tolerate somewhat
                        above average stock market volatility.
 
                      Taken together in appropriate proportions, the Value and
                      Growth Portfolios are expected to approximate the total
                      returns achieved by the 500 Portfolio.
 
                      The share price of each Portfolio is expected to be
                      volatile, and investors should be able to tolerate sudden,
                      sometimes substantial fluctuations in the value of their
                      investment. No assurance can be given that the Portfolios
                      will achieve their stated objectives or that shareholders
                      will be protected from the risks inherent in equity
                      investing. Investors may wish to purchase shares on a
                      regular, periodic basis (dollar-cost averaging) rather
                      than investing in one lump sum in order to reduce the risk
                      of investing all their monies in common stocks at a
                      particularly unfavorable time.
 
                      The Trust is intended to be a long-term investment vehicle
                      and is not designed to provide investors with a means of
                      speculating on short-term market movements. Investors who
                      engage in excessive account activity generate additional
                      costs which are borne by all of the Trust's shareholders.
                      In order to minimize such costs the Trust has adopted the
                      following policies. The Trust reserves the right to reject
                      any purchase request (including exchange purchases from
                      other Vanguard portfolios) that is reasonably deemed to be
                      disruptive to efficient portfolio management, either
                      because of the timing of the investment or previous
                      excessive trading by the investor. Additionally, the Trust
                      has adopted exchange privilege limitations as described in
                      the section "Exchange Privilege Limitations." Finally, the
                      Trust reserves the right to suspend the offering of its
                      shares.
 
                      Investors should not consider the Trust a complete
                      investment program, but should maintain holdings of
                      securities with different risk
                      characteristics -- including common stocks, bonds and
                      money market instruments. Investors may also wish to
                      complement an investment in the Trust with other types of
                      common stock investments.
--------------------------------------------------------------------------------
 
IMPLEMENTATION
OF POLICIES           Each Portfolio of the Trust utilizes a number of
                      investment practices in an effort to match the investment
                      performance of its respective index.
 
THE 500 PORTFOLIO
INVESTS IN ALL 500
S&P STOCKS            The 500 Portfolio attempts to duplicate the investment
                      results of the S&P 500 Index by holding all 500 stocks in
                      approximately the same proportions as they are represented
                      in the Index. This indexing technique is known as
                      "complete replication."
 
                      The S&P 500 Index is composed of 500 common stocks, which
                      are chosen by Standard & Poor's Corporation on a
                      statistical basis to be included in the Index. The
                      inclusion of a stock in the S&P 500 Index in no way
                      implies that Standard & Poor's Corporation believes the
                      stock to be an attractive investment. The 500 securities,
 
                                       16
<PAGE>   19
 
                      most of which trade on the New York Stock Exchange,
                      represented, as of December 31, 1994, approximately 69% of
                      the market value of all U.S. common stocks. Each stock in
                      the S&P 500 Index is weighted by its market value.
 
                      Because of the market-value weighting, the 50 largest
                      companies in the S&P 500 Index currently account for
                      approximately 46% of the Index. Typically, companies
                      included in the S&P 500 Index are the largest and most
                      dominant firms in their respective industries. As of
                      December 31, 1994, the five largest companies in the Index
                      were: General Electric (2.6%), American Telephone and
                      Telegraph (2.4%), Exxon Corporation (2.3%), Coca Cola
                      (2.0%), and Royal Dutch Petroleum (1.7%). The largest
                      industry categories were: telephone companies (8.5%),
                      international oil companies (6.3%), pharmaceutical
                      companies (5.3%), banks (5.3%), and electric power (4.0%).
 
THE EXTENDED MARKET
PORTFOLIO INVESTS IN
MEDIUM- AND
SMALL-SIZE
COMPANY STOCKS        While the S&P 500 Index includes the preponderance of
                      large market capitalization stocks, it excludes most of
                      the medium- and small-size companies which comprise the
                      remaining 31% of the capitalization of the U.S. stock
                      market. The Wilshire 4500 Index consists of all U.S.
                      stocks that are not in the S&P 500 Index and that trade
                      regularly on the New York and American Stock Exchanges as
                      well as in the NASDAQ over-the-counter market. More than
                      5,000 stocks of medium- and small-capitalization companies
                      are included in the Wilshire 4500 Index.
 
                      The Extended Market Portfolio will be unable to hold all
                      of the more than 5,000 issues which comprise the Wilshire
                      4500 Index because of the costs involved and the
                      illiquidity of many of the securities. Instead, the
                      Portfolio will hold a representative sample of the
                      securities in the Wilshire 4500 Index.
 
THE TOTAL STOCK
MARKET PORTFOLIO
INVESTS IN A SAMPLE OF
ALL U.S. STOCKS       Neither the S&P 500 Index nor the Wilshire 4500 Index
                      independently represents the U.S. stock market as a whole.
                      The Wilshire 5000 Index, which consists of all regularly
                      and publicly traded U.S. stocks, provides a complete proxy
                      for the U.S. stock market. More than 6,000 stocks,
                      including large-, medium-, and small-capitalization
                      companies are included in the Wilshire 5000 Index.
 
                      The following table illustrates the changing proportions
                      that the S&P 500 Index and the Wilshire 4500 Index have
                      represented in the Wilshire 5000 Index since 1985.
 
<TABLE>
<CAPTION>
                              WILSHIRE 5000 INDEX
                              -------------------------------------------
                                                     1985    1986    1987    1988    1989    1990    1991    1992    1993    1994
                                                     ----    ----    ----    ----    ----    ----    ----    ----    ----    ----
                              <S>                    <C>     <C>     <C>     <C>     <C>     <C>     <C>     <C>     <C>     <C>
                              S&P 500..............   69%     70%     71%     71%     73%     72%     75%     71%     67%     69%
                              Wilshire 4500........   31%     30%     29%     29%     27%     28%     25%     29%     33%     31%
                                                     ----    ----    ----    ----    ----    ----    ----    ----    ----    ----
                                                     100%    100%    100%    100%    100%    100%    100%    100%    100%    100%
</TABLE>
 
                      In an effort to replicate the investment performance of
                      the Wilshire 5000 Index, the Total Stock Market Portfolio
                      will invest in approximately 1,000 of the largest stocks
                      in the index and an additional representative sample of
                      the remaining stocks. As in the case for the Extended
                      Market Portfolio, the high transaction costs and
                      illiquidity of many of the smaller stocks make complete
                      replication of the Wilshire 4500 Index's holdings
                      impractical.
 
                                       17
<PAGE>   20
 
                      The Extended Market and Total Stock Market Portfolios are
                      not sponsored, endorsed, sold or promoted by Wilshire
                      Associates. Wilshire(R) and Wilshire 5000(R) are
                      registered service marks of Wilshire Associates.
 
THE SMALL
CAPITALIZATION STOCK
PORTFOLIO INVESTS IN
SMALL-SIZE COMPANY
STOCKS                The Small Capitalization Stock Portfolio attempts to
                      duplicate the investment results of the Russell 2000 Index
                      by investing in approximately 1,000 of the 2,000 stocks in
                      the Russell 2000 Index. The Russell 2000 Index is composed
                      of approximately 2,000 small-capitalization common stocks.
                      A company's stock market capitalization is the total
                      market value of its floating outstanding shares. As of
                      December 31, 1994, the average stock market capitalization
                      of the Russell 2000 was $211 million. As in the case of
                      the Extended Market Portfolio, the high transaction costs
                      and illiquidity of many of the small stocks contained in
                      the Russell 2000 Index make complete replication of the
                      holdings impractical.
 
                      The Portfolio is neither sponsored by nor affiliated with
                      the Frank Russell Company. Frank Russell's only
                      relationship to the Portfolio is the licensing of the use
                      of the Russell 2000 Small Stock Index. Frank Russell
                      Company is the owner of the trademarks and copyrights
                      relating to the Russell indexes.
 
THE EXTENDED MARKET,
TOTAL STOCK MARKET AND
SMALL CAPITALIZATION
STOCK PORTFOLIOS USE
SAMPLING TECHNIQUES   The stocks of the Wilshire 4500 Index to be included in
                      the Extended Market Portfolio will be selected utilizing a
                      statistical sampling technique known as "optimization."
                      This process selects stocks for the Portfolio so that
                      various industry weightings, market capitalizations and
                      fundamental characteristics (e.g. price-to-book,
                      price-to-earnings, debt-to-asset ratios, and dividend
                      yields) closely approximate those of the appropriate
                      Index. For instance, if 10% of the capitalization of the
                      Wilshire 4500 Index consists of utility companies with
                      relatively large stock capitalizations, then the Extended
                      Market Portfolio is constructed so that approximately 10%
                      of the Portfolio's assets are invested in the stocks of
                      utility companies with relatively large capitalizations.
                      The Total Stock Market and Small Capitalization Stock
                      Portfolios are constructed using the same sampling
                      technique.
 
                      This sampling technique is expected to be an effective
                      means of substantially duplicating the income and capital
                      returns of the Extended Market, Total Stock Market and
                      Small Capitalization Stock Portfolios' target benchmarks.
                      Over time, the correlation between the performance of the
                      Extended Market, Total Stock Market and Small
                      Capitalization Stock Portfolios and their respectives
                      indexes, the Wilshire 4500 Index, Wilshire 5000 Index and
                      Russell 2000 Index, is expected to be at least 0.95. A
                      correlation of 1.00 would indicate perfect correlation,
                      which would be achieved when the net asset value of a
                      Portfolio, including the value of its dividend and capital
                      gains distributions, increases or decreases in exact
                      proportion to changes in the respective target benchmark.
 
                      Due to the use of the sampling technique, neither the
                      Extended Market Portfolio, Total Stock Market Portfolio
                      nor the Small Capitalization Stock Portfolio is expected
                      to track its benchmark index with the same degree of
                      accuracy as evidenced by the high degree of correlation
                      between the 500 Portfolio and its benchmark. However, the
                      principal advantage of this technique is to provide an
                      efficient means to invest in the universe of stocks. In
                      particular, the three Portfolios are expected to provide
 
                                       18
<PAGE>   21
 
                      broad diversification, and should operate at low costs due
                      both to their "passive" approach to portfolio management
                      and low portfolio turnover rate.
 
THE VALUE AND GROWTH
PORTFOLIOS EMPHASIZE
STOCKS WITH CERTAIN
INVESTMENT
CHARACTERISTICS       In an effort to duplicate the investment results of their
                      respective indexes, the Value and Growth Portfolios will
                      utilize "complete replication," the same indexing
                      technique used for the 500 Portfolio. Specifically, the
                      Value and Growth Portfolios will hold all of the stocks
                      included in the S&P/BARRA Value and Growth Indexes,
                      respectively, in approximately the same proportions as
                      those stocks are represented in the Indexes.
 
                      Standard & Poor's Corporation constructs the S&P/BARRA
                      Value and Growth Indexes semi-annually by ranking all
                      common stocks included in the S&P 500 Index by their
                      price-to-book ratios. The resulting list is then divided
                      in half by market capitalization. Those companies
                      representing half of the market capitalization of the S&P
                      500 Index and having lower price-to-book ratios are
                      included in the S&P/BARRA Value Index; the remaining
                      companies are incorporated in the S&P/BARRA Growth Index.
                      On December 31, 1994, after the semi-annual reconstitution
                      of the indexes, the S&P/BARRA Value Index consisted of 318
                      common stocks in the S&P 500 Index, while the S&P/BARRA
                      Growth Index consisted of the remaining 182. Each Index
                      represented half of the market capitalization of the S&P
                      500 Index.
 
                      Investment managers may use a number of different methods
                      to classify stocks as "value" or "growth". There may also
                      be other ways to define benchmarks for "value" and
                      "growth" investing. If other methods were applied to the
                      companies comprising the S&P/BARRA Value and Growth
                      Indexes, the classification of the stocks as "growth" or
                      "value" might be different.
 
                      Typically, the stocks included in the S&P/BARRA Value
                      Index exhibit above-average dividend yields and lower
                      price-to-book ratios. By comparison, the stocks included
                      in the S&P/BARRA Growth Index exhibit below-average
                      dividend yields and higher price-to-book ratios. As of
                      December 31, 1994, the five largest companies in the
                      S&P/BARRA Value Index were Exxon Corp., Royal Dutch
                      Petroleum Co., IBM, DuPont E.I. de Nemours, and Mobil, the
                      five largest companies in the S&P/BARRA Growth Index were
                      General Electric Co., American Telephone & Telegraph, Coca
                      Cola Co., Phillip Morris Cos., Inc., and Wal-Mart Stores.
 
                      "Standard & Poor's(R)," "S&P(R)," "S&P 500(R)," "Standard
                      & Poor's 500(R)," and "500" are trademarks of McGraw-Hill,
                      Inc. and have been licensed for use by Vanguard. The 500,
                      Value and Growth Portfolios are not sponsored, endorsed,
                      sold or promoted by Standard & Poor's Corporation ("S&P").
                      S&P makes no representations or warranty, implied or
                      expressed, to the purchasers of the Portfolios or any
                      member of the public regarding the advisability of
                      investing in index funds or the ability of the S&P 500,
                      S&P/BARRA Value and S&P/BARRA Growth Indexes to track
                      general stock market performance or to track the general
                      performance of value and growth stocks. S&P does not
                      guarantee the accuracy and/or the completeness of the S&P
                      500, S&P/BARRA Value and S&P/BARRA Growth Indexes or any
                      data included herein.
 
                      S&P MAKES NO WARRANTY, EXPRESS OR IMPLIED, AS TO RESULTS
                      TO BE OBTAINED BY LICENSEE, OWNERS OF THE TRUST, ANY
                      PERSON OR ENTITY FROM
 
                                       19
<PAGE>   22
 
                      THE USE OF THE S&P 500 OR ANY DATA INCLUDED THEREIN IN
                      CONNECTION WITH THE USE LICENSED HEREUNDER, OR FOR ANY
                      OTHER USE. S&P MAKES NO EXPRESS OR IMPLIED WARRANTIES, AND
                      HEREBY EXPRESSLY DISCLAIMS ALL SUCH WARRANTIES OF
                      MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE FOR
                      USE WITH RESPECT TO THE S&P 500 OR ANY DATA INCLUDED
                      THEREIN.
 
                      S&P's only relationship to the Portfolios is the licensing
                      of the S&P marks and the S&P 500, S&P/BARRA Value and
                      S&P/BARRA Growth Indexes, which are determined, composed
                      and calculated by S&P without regard to the 500, Value and
                      Growth Portfolios.
 
EACH PORTFOLIO MAY
INVEST IN SHORT-TERM
FIXED INCOME
SECURITIES            Although all six Portfolios normally seek to remain
                      substantially fully invested in common stocks, the
                      Portfolios of the Trust may invest temporarily in certain
                      short-term fixed income securities. Such securities may be
                      used to invest uncommitted cash balances or to maintain
                      liquidity to meet shareholder redemptions. These
                      securities include: obligations of the United States
                      Government and its agencies or instrumentalities;
                      commercial paper, bank certificates of deposit, and
                      bankers' acceptances; and repurchase agreements
                      collateralized by these securities.
 
EACH PORTFOLIO MAY
USE FUTURES CONTRACTS,
OPTIONS AND WARRANTS,
CONVERTIBLE SECURITIES
AND SWAP AGREEMENTS   Each Portfolio of the Trust may utilize stock futures
                      contracts, options, warrants, convertible securities and
                      swap agreements to a limited extent. Specifically, each
                      Portfolio may enter into futures contracts and options
                      provided that not more than 5% of its assets are required
                      as a margin deposit for futures contracts or options and
                      provided that not more than 20% of a Portfolio's assets
                      are invested in futures and options at any time.
                      Additionally, the Trust's investment in warrants will not
                      exceed more than 5% of its assets (2% with respect to
                      warrants not listed on the New York or American Stock
                      Exchanges). Futures contracts, options, warrants,
                      convertible securities and swap agreements may be used for
                      several reasons: to simulate full investment in the
                      underlying index while retaining a cash balance for fund
                      management purposes, to facilitate trading, to reduce
                      transaction costs or to seek higher investment returns
                      when a futures contract, option, warrant, convertible
                      security or swap agreement is priced more attractively
                      than the underlying equity security or index. While each
                      of these securities can be used as leveraged investments,
                      the Portfolios may not use them to leverage its net
                      assets.
 
FUTURES CONTRACTS,
OPTIONS, WARRANTS,
CONVERTIBLE SECURITIES
AND SWAP AGREEMENTS
POSE CERTAIN RISKS    The risk of loss associated with futures contracts in some
                      strategies can be substantial due both to the low margin
                      deposits required and the extremely high degree of
                      leverage involved in futures pricing. As a result, a
                      relatively small price movement in a futures contract may
                      result in an immediate and substantial loss or gain.
                      However, the Portfolios will not use futures contracts,
                      options, warrants, convertible securities and swap
                      agreements for speculative purposes or to leverage their
                      net assets. Accordingly, the primary risks associated with
                      the use of futures contracts, options, warrants,
                      convertible securities and swap agreements by the
                      Portfolios are: (i) imperfect correlation between the
                      change in market value of the stocks held by a Portfolio
                      and the prices of futures contracts, options, warrants,
                      convertible securities and swap agreements; and (ii)
                      possible lack of a liquid secondary market for a futures
                      contract and the resulting inability to close a futures
                      position prior to its maturity date. The risk of imperfect
                      correlation will be minimized by investing only in those
                      contracts whose behavior is expected to
 
                                       20
<PAGE>   23
 
                      resemble that of a Portfolio's underlying securities. The
                      risk that a Portfolio will be unable to close out a
                      futures position will be minimized by entering into such
                      transactions on an exchange with an active and liquid
                      secondary market. However options, warrants, convertible
                      securities and swap agreements purchased or sold
                      over-the-counter may be less liquid than exchange-traded
                      securities. Illiquid securities, in general, may not
                      represent more than 15% of the net assets of a Portfolio
                      of the Trust.
 
                      Since there are no futures traded on the S&P/BARRA Value
                      or Growth Indexes, it will be necessary for the Value and
                      Growth Portfolios to utilize a composite of other futures
                      contracts to simulate the performance of each of these
                      Indexes. This process may magnify the "tracking error" of
                      each Portfolio's performance compared to that of the
                      Indexes, due to lower correlation of the selected futures
                      with the Indexes. The investment adviser will attempt to
                      reduce this tracking error by investing in futures
                      contracts whose behavior is expected to resemble that of
                      the underlying securities, although there can be no
                      assurance that these selected futures will perfectly
                      correlate with the performance of the Indexes.
 
                      Swap agreements are contracts between parties in which one
                      party agrees to make payments to the other party based on
                      the change in market value of a specified index or asset.
                      In return, the other party agrees to make payments to the
                      first party based on the return of a different specified
                      index or asset. Although swap agreements entail the risk
                      that a party will default on its payment obligations
                      thereunder, the Portfolios will minimize this risk by
                      entering into agreements that mark to market no less
                      frequently than quarterly. Swap agreements also bear the
                      risk that the Portfolios will not be able to meet its
                      obligation to the counterparty. This risk will be
                      mitigated by investing the Portfolios in the specific
                      asset for which it is obligated to pay a return.
 
EACH PORTFOLIO MAY
LEND ITS SECURITIES   Each Portfolio of the Trust may lend its investment
                      securities to qualified institutional investors for either
                      short-term or long-term purposes of realizing additional
                      income. Loans of securities by a Portfolio will be
                      collateralized by cash, letters of credit, or securities
                      issued or guaranteed by the U.S. Government or its
                      agencies. The collateral will equal at least 100% of the
                      current market value of the loaned securities, and such
                      loans may not exceed 33 1/3% of the value of the
                      Portfolio's net assets.
 
PORTFOLIO TURNOVER IS
EXPECTED TO BE LOW    Although each Portfolio generally seeks to invest for the
                      long term, the six Portfolios of the Trust retain the
                      right to sell securities irrespective of how long they
                      have been held. However, because of the "passive"
                      investment management approach of the Trust, the portfolio
                      turnover rate for each Portfolio is expected to be under
                      50%, a generally lower turnover rate than for most other
                      investment companies. A portfolio turnover rate of 50%
                      would occur if one half of a Portfolio's securities were
                      sold within one year. Ordinarily, securities will be sold
                      from a Portfolio only to reflect certain administrative
                      changes in an index (including mergers or changes in the
                      composition of an index) or to accommodate cash flows into
                      and out of each Portfolio while maintaining the similarity
                      of a Portfolio to its benchmark index.
--------------------------------------------------------------------------------
 
                                       21
<PAGE>   24
 
INVESTMENT
LIMITATIONS
THE TRUST HAS ADOPTED
CERTAIN FUNDAMENTAL
LIMITATIONS           The Trust has adopted certain limitations on its
                      investment practices. Specifically, each Portfolio of the
                      Trust will not:
 
                      (a) with respect to 75% of its assets, purchase securities
                          of any issuer (except obligations of the U.S.
                          Government and its instrumentalities) if, as a result,
                          more than 5% of the value of the Portfolio's assets
                          would be invested in the securities of such issuer;
 
                      (b) with respect to 75% of its assets, purchase more than
                          10% of the voting securities of any issuer;
 
                      (c) invest more than 25% of its assets in any one
                          industry; and
 
                      (d) borrow money, except that a Portfolio may borrow from
                          banks (or through reverse repurchase agreements), for
                          temporary or emergency (not leveraging) purposes,
                          including the meeting of redemption requests which
                          might otherwise require the untimely disposition of
                          securities, in an amount not exceeding 15% of the
                          value of the Portfolio's net assets (including the
                          amount borrowed and the value of any outstanding
                          reverse repurchase agreements) at the time the
                          borrowing is made. Whenever borrowings exceed 5% of
                          the value of a Portfolio's net assets, the Portfolio
                          will not make any additional investments.
 
                      These investment limitations are considered at the time
                      investment securities are purchased. The limitations
                      described here and in the Statement of Additional
                      Information may be changed only with the approval of a
                      majority of a Portfolio's shareholders.
--------------------------------------------------------------------------------
 
MANAGEMENT
OF THE TRUST
VANGUARD ADMINISTERS
AND DISTRIBUTES THE
TRUST                 The Trust is a member of The Vanguard Group of Investment
                      Companies, a family of more than 30 investment companies
                      with more than 80 distinct portfolios and total assets in
                      excess of $130 billion. Through their jointly-owned
                      subsidiary, The Vanguard Group, Inc. ("Vanguard"), the
                      Trust and the other funds in the Group obtain at cost
                      virtually all of their corporate management,
                      administrative and distribution services. Vanguard also
                      provides investment advisory services on an at-cost basis
                      to certain Vanguard funds. As a result of Vanguard's
                      unique corporate structure, the Vanguard funds have costs
                      substantially lower than those of most competing mutual
                      funds. In 1994, the average expense ratio (annual costs
                      including advisory fees divided by total net assets) for
                      the Vanguard funds amounted to approximately .30% compared
                      to an average of 1.05% for the mutual fund industry (data
                      provided by Lipper Analytical Services).
 
                      The Officers of the Trust manage its day-to-day operations
                      and are responsible to the Trust's Board of Trustees. The
                      Trustees set broad policies for the Trust and choose its
                      Officers. A list of the Trustees and Officers of the Trust
                      and a statement of their present positions and principal
                      occupations during the past five years can be found in the
                      Statement of Additional Information.
 
                      Vanguard employs a supporting staff of management and
                      administrative personnel needed to provide the requisite
                      services to the funds and also furnishes the funds with
                      necessary office space, furnishings and equipment. Each
                      fund pays its share of Vanguard's total expenses, which
                      are allocated among the funds under methods
 
                                       22
<PAGE>   25
 
                      approved by the Board of Trustees (Directors) of each
                      fund. In addition, each fund bears its own direct
                      expenses, such as legal, auditing and custodian fees.
 
                      Vanguard provides distribution and marketing services to
                      the funds. The funds are available on a no-load basis
                      (i.e., there are no sales commissions or 12b-1 fees).
                      However, each fund bears its share of the Group's
                      distribution costs.
--------------------------------------------------------------------------------
 
INVESTMENT
ADVISER
VANGUARD MANAGES
THE TRUST ON AN
AT-COST BASIS         The six Portfolios of the Trust receive all investment
                      advisory services on an at-cost basis from Vanguard's Core
                      Management Group. The Core Management Group also provides
                      investment advisory services to several other Vanguard
                      Funds, including Vanguard International Equity Index Fund,
                      Vanguard Institutional Index Fund, Vanguard Balanced Index
                      Fund, Vanguard Variable Insurance Fund--Equity Index
                      Portfolio, and a portion of Vanguard/Windsor II, as well
                      as to several indexed separate accounts. Total assets
                      under management by the Core Management Group were $18
                      billion as of December 31, 1994. The Trust is not actively
                      managed, but is instead administered by the Core
                      Management Group using computerized, quantitative
                      techniques. The Core Management Group is supervised by the
                      Officers of the Trust.
 
                      In placing portfolio transactions, the Core Management
                      Group uses its best judgment to choose the broker most
                      capable of providing the brokerage services necessary to
                      obtain the best available price and most favorable
                      execution at the lowest commission rate. The full range
                      and quality of brokerage services available are considered
                      in making these determinations. In those instances where
                      it is reasonably determined that more than one broker can
                      offer the services needed to obtain the best available
                      price and most favorable execution, consideration may be
                      given to those brokers which supply statistical
                      information and provide other services in addition to
                      execution services to the Trust.
--------------------------------------------------------------------------------
 
PERFORMANCE
RECORD                The tables in this section provide investment results for
                      the 500, Extended Market and Small Capitalization Stock
                      Portfolios of the Trust for several periods throughout the
                      Trust's lifetime. The results shown represent "total
                      return" investment performance, which assumes the
                      reinvestment of all capital gains and income dividends for
                      the indicated periods. Also included is comparative
                      information with respect to the unmanaged S&P 500
                      Composite Stock Price Index, the Wilshire 4500 Index and
                      the Russell 2000 Index. The results for the Portfolios are
                      net of all expenses while the results of the stock indexes
                      are hypothetical and make no allowances for the costs of
                      investing. The tables do not make any allowance for
                      federal, state or local income taxes, which shareholders
                      must pay on a current basis. The Total Stock Market,
                      Value, and Growth Portfolios were introduced in 1992, and
                      so long-term investment results are not yet available.
 
                      The results shown should not be considered a
                      representation of the total return from an investment made
                      in the Trust today. The periods shown were generally
                      favorable ones for stock market investing. This
                      information is provided to help investors better
                      understand the Trust and may not provide a basis for
                      comparison with other investments or mutual funds which
                      use a different method to calculate performance.
 
                                       23
<PAGE>   26
 
<TABLE>
<CAPTION>
                                                      AVERAGE ANNUAL TOTAL
                                                           RETURN FOR
                                                   VANGUARD INDEX TRUST --500
                                                           PORTFOLIO
                                                   --------------------------
                               FISCAL PERIODS          500           S&P 500
                               ENDED 12/31/94       PORTFOLIO*        INDEX
                             ------------------    ------------     ---------
                             <S>                   <C>              <C>
                             1 Year                    + 1.1%         + 1.3%
                             5 Years                   + 8.5          + 8.7
                             10 Years                  +14.0          +14.3
                             Lifetime**                +12.5          +13.0
</TABLE>
 
                             * Inclusive of $10 annual account maintenance fee.
                            ** August 31, 1976 to December 31, 1994.
 
<TABLE>
<CAPTION>
                                                   AVERAGE ANNUAL TOTAL RETURN
                                                               FOR
                                                     VANGUARD INDEX TRUST --
                                                    EXTENDED MARKET PORTFOLIO
                                                   ---------------------------
                                                     EXTENDED        WILSHIRE
                               FISCAL PERIODS         MARKET           4500
                               ENDED 12/31/94       PORTFOLIO*        INDEX
                             ------------------    ------------     ----------
                             <S>                   <C>              <C>
                             1 Year                    - 2.8%          - 2.7%
                             5 Years                   + 8.8           + 9.1
                             Lifetime**                +12.3           +12.7
</TABLE>
 
                             * Includes 1% portfolio transaction fee and $10
                               annual account maintenance fee.
                            ** December 21, 1987 to December 31, 1994.
 
<TABLE>
<CAPTION>
                                                          AVERAGE ANNUAL TOTAL RETURN FOR
                                                              VANGUARD INDEX TRUST --
                                                             SMALL CAPITALIZATION STOCK
                                                                     PORTFOLIO+
                                                          --------------------------------
                                                                SMALL             RUSSELL
                                  FISCAL PERIODS            CAPITALIZATION         2000
                                  ENDED 12/31/94           STOCK PORTFOLIO*        INDEX
                             -------------------------    ------------------     ---------
                             <S>                          <C>                    <C>
                             1 Year                              - 1.6%            - 1.8%
                             3 Years                             +11.3             +11.4
                             5 Years                             +10.4             +10.2
                             Since September 11, 1989            + 8.2               N/A
</TABLE>
 
                            * Includes 1% portfolio transaction fee and $10
                              annual account maintenance fee.
                            + Formerly Vanguard Small Capitalization Stock Fund,
                              Inc.
--------------------------------------------------------------------------------
 
DIVIDENDS,
CAPITAL GAINS
AND TAXES
FOUR PORTFOLIOS PAY
QUARTERLY DIVIDENDS;
TWO PAY DIVIDENDS
ONCE A YEAR           The Trust distributes substantially all of its net
                      investment income in the form of dividends. The 500, Total
                      Stock Market, Value and Growth Portfolios pay quarterly
                      dividends, while the Extended Market and Small
                      Capitalization Stock Portfolios pay annual dividends. For
                      all six Portfolios, net capital gains, if any, are
                      distributed annually.
 
                      A Portfolio's dividend and capital gains distributions may
                      be reinvested in additional shares or received in cash.
                      See "Choosing a Distribution Option" for a description of
                      these distribution methods.
 
                      Pursuant to the Internal Revenue Code, certain dividend
                      and capital gains distributions declared by each Portfolio
                      during December, if received by shareholders by
 
                                       24
<PAGE>   27
 
                      January 31, are deemed to have been paid by the Trust and
                      received by shareholders on December 31 of the prior year.
 
EACH PORTFOLIO CHARGES
A $10 ANNUAL ACCOUNT
MAINTENANCE FEE       The Trust automatically deducts a $10 annual account
                      maintenance fee from the dividend income paid to each
                      Portfolio account. For the 500, Total Stock Market, Value
                      and Growth Portfolios the $10 account maintenance fee is
                      deducted at a rate of $2.50 per quarter from the dividend;
                      while for the Extended Market and Small Capitalization
                      Stock Portfolios the $10 fee is deducted once a year from
                      the dividend. If the dividend to be paid to an account is
                      less than the fee to be deducted, sufficient shares will
                      be redeemed from an account to make up the difference. The
                      Board of Trustees reserves the right to change the annual
                      account maintenance fee to reflect the actual cost of
                      maintaining shareholder accounts. This fee will be waived
                      for shareholders with an account balance of $10,000 or
                      more.
 
                      Each Portfolio of the Trust intends to continue to qualify
                      for taxation as a "regulated investment company" under the
                      Internal Revenue Code so that each Portfolio will not be
                      subject to federal income tax to the extent its income is
                      distributed to shareholders. Dividends paid by each
                      Portfolio from net investment income and net short-term
                      capital gains, whether received in cash or reinvested in
                      additional shares, will be taxable to shareholders as
                      ordinary income. For corporate investors, dividends from
                      net investment income will generally qualify in part for
                      the intercorporate dividends-received deduction. However,
                      the portion of the dividends so qualified depends on the
                      aggregate taxable qualifying dividend income received by a
                      Portfolio from domestic (U.S.) sources.
 
                      Distributions paid by a Portfolio from long-term capital
                      gains, whether received in cash or reinvested in
                      additional shares, are taxable as long-term capital gains,
                      regardless of the length of time you have owned shares in
                      the Portfolio. Capital gains distributions are made when a
                      Portfolio realizes net capital gains on sales of portfolio
                      securities during the year. A Portfolio does not seek to
                      realize any particular amount of capital gains during a
                      year; rather, realized gains are a by-product of portfolio
                      management activities. Consequently, capital gains
                      distributions may be expected to vary considerably from
                      year to year; there will be no capital gains distributions
                      in years when a Portfolio realizes net capital losses.
 
                      Note that if you elect to receive capital gains
                      distributions in cash, instead of reinvesting them in
                      additional shares, you are in effect reducing the capital
                      at work for you in a Portfolio. Also, keep in mind that if
                      you purchase shares in a Portfolio shortly before the
                      record date for a dividend or capital gains distribution,
                      a portion of your investment will be returned to you as a
                      taxable distribution, regardless of whether you are
                      reinvesting your distributions or receiving them in cash.
 
                      The Trust will notify you annually as to the tax status of
                      dividend and capital gains distributions paid by each
                      Portfolio.
 
A CAPITAL GAIN OR LOSS
MAY BE REALIZED
UPON EXCHANGE
OR REDEMPTION         A sale of shares of a Portfolio is a taxable event, and
                      may result in a capital gain or loss. A capital gain or
                      loss may be realized from an ordinary redemption of shares
                      or an exchange of shares between two mutual funds (or two
                      portfolios of the same fund).
 
                                       25
<PAGE>   28
 
                      Dividend distributions, capital gain distributions, and
                      capital gains or losses from redemptions and exchanges may
                      be subject to state and local taxes.
 
                      Each Portfolio of the Trust is required to withhold 31% of
                      taxable dividends, capital gains distributions, and
                      redemptions paid to shareholders who have not complied
                      with IRS taxpayer identification regulations. You may
                      avoid this withholding requirement by certifying on your
                      Account Registration Form your proper Social Security or
                      Employer Identification number and by certifying that you
                      are not subject to backup withholding.
 
                      The Trust is organized as a Pennsylvania business trust
                      and, in the opinion of counsel, is not liable for any
                      income or franchise tax in the Commonwealth of
                      Pennsylvania. The Trust will be subject to Pennsylvania
                      county personal property tax in the county which is the
                      site of its principal office. Shareholders who are
                      Pennsylvania residents will not be subject to county
                      personal property taxes, with the exception of non-exempt
                      holders who are residents of the City and School District
                      of Pittsburgh.
 
                      The tax discussion set forth above is included for general
                      information only. Prospective investors should consult
                      their own tax advisers concerning the tax consequences of
                      an investment in the Trust.
--------------------------------------------------------------------------------
 
THE SHARE
PRICE OF
EACH PORTFOLIO        The share price or "net asset value" per share of each
                      Portfolio is determined by dividing the total market value
                      of the Portfolio's investments and other assets, less any
                      liabilities, by the number of outstanding shares of the
                      Portfolio. Net asset value per share is determined once
                      daily at the close of regular trading on the New York
                      Stock Exchange (generally 4:00 p.m. Eastern time).
 
                      Portfolio securities that are listed on a securities
                      exchange are valued at the last quoted sales price on the
                      day the valuation is made. Price information on listed
                      securities is taken from the exchange where the security
                      is primarily traded. Securities which are listed on an
                      exchange and which are not traded on the valuation date
                      are valued at the mean of the bid and ask prices. For the
                      500, Value and Growth Portfolios, unlisted securities for
                      which market quotations are readily available are valued
                      at the latest quoted bid price. For the Extended Market,
                      Total Stock Market and Small Capitalization Stock
                      Portfolios, unlisted securities for which market
                      quotations are readily available are valued at the mean of
                      the bid and ask prices. Temporary cash investments are
                      valued at amortized cost which approximates market value.
                      Securities for which no current quotations are readily
                      available are valued at fair market value as determined in
                      good faith by the Trustees. Securities may be valued on
                      the basis of prices provided by a pricing service when
                      such prices are believed to reflect the fair market value
                      of such securities.
 
                      Each Portfolio's share price can be found daily in the
                      mutual fund listings of most major newspapers under the
                      heading of The Vanguard Group.
--------------------------------------------------------------------------------
 
                                       26
<PAGE>   29
 
GENERAL
INFORMATION           The Trust is a Pennsylvania business trust. The
                      Declaration of Trust permits the Trustees to issue an
                      unlimited number of shares of beneficial interest with no
                      par value. The Board of Trustees has the power to
                      designate one or more classes or series of shares of
                      common stock and to classify or reclassify any unissued
                      shares with respect to such series. Currently, the Trust
                      is offering shares of six series.
 
                      The shares of each series are fully paid and
                      non-assessable; have no preference as to conversion,
                      exchange, dividends, retirement or other features; and
                      have no pre-emptive rights. Such shares have
                      non-cumulative voting rights, meaning that the holders of
                      more than 50% of the shares voting for the election of
                      Trustees can elect 100% of the Trustees if they so choose.
 
                      Annual meetings of shareholders will not be held except as
                      required by the Investment Company Act of 1940 and other
                      applicable law. An annual meeting will be held to vote on
                      the removal of a Trustee or Trustees of the Trust if
                      requested in writing by the holders of not less than 10%
                      of the outstanding shares of the Trust.
 
                      All securities and cash for the 500, Extended Market and
                      Total Stock Market Portfolios are held by State Street
                      Bank and Trust Company, Boston, MA. All securities and
                      cash for the Small Capitalization Stock and the Value and
                      Growth Portfolios are held by CoreStates Bank,
                      Philadelphia, PA. The Vanguard Group, Inc., Valley Forge,
                      PA, serves as the Trust's Transfer and Dividend Disbursing
                      Agent. Price Waterhouse LLP serves as independent
                      accountants for the Trust and will audit its financial
                      statements annually. The Trust is not involved in any
                      litigation.
--------------------------------------------------------------------------------
 
                                       27
<PAGE>   30
 
                               SHAREHOLDER GUIDE
 
OPENING AN
ACCOUNT AND
PURCHASING
SHARES                You may open a regular (non-retirement) account, either by
                      mail or wire. Simply complete and return an Account
                      Registration Form or appropriate Adoption Agreement (e.g.,
                      the IRA Adoption Agreement) and any required legal
                      documentation, indicating the amount you wish to invest.
                      Your purchase must be equal to or greater than the $3,000
                      minimum initial investment requirement for each Portfolio
                      ($500 for retirement accounts or Uniform Gifts/Transfers
                      to Minors Act accounts). You must open a new Individual
                      Retirement Account by mail (IRAs may not be opened by
                      wire) using a Vanguard IRA Adoption Agreement. Your
                      purchase must be equal to or greater than the $500 minimum
                      initial investment requirement, but no more than $2,000 if
                      you are making a regular IRA contribution. Rollover
                      contributions are generally limited to the amount
                      withdrawn within the past 60 days from an IRA or other
                      qualified Retirement Plan. If you need assistance with the
                      forms or have any questions about the Trust, please call
                      our Investor Information Department (1-800-662-7447).
                      NOTE: For other types of account registrations (e.g.,
                      corporations, associations, other organizations, trusts or
                      powers of attorney), please call us to determine which
                      additional forms you may need.
 
                      Because of the risks associated with common stock
                      investments, the Trust is intended to be a long-term
                      investment vehicle and is not designed to provide
                      investors with a means of speculating on short-term market
                      movements. Consequently, the Trust reserves the right to
                      reject any specific purchase (and exchange purchase)
                      request. The Trust also reserves the right to suspend the
                      offering of shares for a period of time.
 
IMPORTANT NOTE ON
EXPENSES              Shares of each Portfolio are purchased at the
                      next-determined net asset value per share after your
                      investment has been received. Purchases of the Small
                      Capitalization Stock Portfolio are subject to a portfolio
                      transaction fee of 1%, purchases of the Extended Market
                      Portfolio are subject to a 0.5% portfolio transaction fee,
                      while purchases of the Total Stock Market Portfolio are
                      subject to a 0.25% portfolio transaction fee. In addition,
                      all six Portfolios charge a $10 annual account maintenance
                      fee. See "Trust Expenses." The Trust is offered on a
                      no-load basis (i.e., there are no sales commissions or
                      12b-1 fees).
 
ADDITIONAL
INVESTMENTS           Subsequent investments to regular accounts may be made by
                      mail ($100 minimum), wire ($1,000 minimum), written
                      exchange from another Vanguard Fund account ($100
                      minimum), or Vanguard Fund Express. However, the Trust
                      reserves the right to reject any specific purchase
                      request, whether it be made by check, wire, exchange from
                      another Vanguard Fund account, or Vanguard Fund Express.
                      Subsequent investments to Individual Retirement Accounts
                      may be made by mail ($100 minimum) or exchange from
                      another Vanguard Fund account. In some instances,
                      contributions may be made by wire or Vanguard Fund
                      Express. Please call us for more information on these
                      options.
--------------------------------------------------------------------------------
 
                                       28
<PAGE>   31
 
<TABLE>
<S>                       <C>                                       <C>
                                                                    ADDITIONAL INVESTMENTS
                          NEW ACCOUNT                               TO EXISTING ACCOUNTS
PURCHASING BY MAIL        Please include the amount of              Additional investments should
                          your initial investment and               include the Invest-by-Mail
Complete and sign the     indicate the Portfolio(s) you             remittance form attached to your
enclosed Account          have selected on the                      Fund confirmation statements.
Registration Form         registration form, make your              Please make your check payable
                          check payable to The Vanguard             to The Vanguard
                          Group-- (Portfolio Number), see           Group--(Portfolio Number), see
                          below for the appropriate                 below for the appropriate
                          portfolio number, and mail to:            portfolio number, write your
                                                                    account number on your check
                          VANGUARD FINANCIAL CENTER                 and, using the return envelope
                          P.O. BOX 2600                             provided, mail to the address
                          VALLEY FORGE, PA 19482                    indicated on the Invest-by-Mail
                                                                    Form.
For express or            VANGUARD FINANCIAL CENTER                 All written requests should be
registered mail,          455 DEVON PARK DRIVE                      mailed to one of the addresses
send to:                  WAYNE, PA 19087                           indicated for new accounts. Do
                                                                    not send registered or express
                                                                    mail to the post office box
                                                                    address.
</TABLE>
 
                      VANGUARD INDEX TRUST PORTFOLIO NUMBERS:
                      500 Portfolio -- 40
                      Extended Market Portfolio -- 98
                      Total Stock Market Portfolio -- 85
                      Small Capitalization Stock Portfolio -- 48
                      Value Portfolio -- 06
                      Growth Portfolio -- 09
 
<TABLE>
<S>                       <C>                                       
PURCHASING BY WIRE        --------------------------------
Money should be                             CORESTATES BANK, N.A.
wired to:                                   ABA 031000011
                                            CORESTATES NO. 0101 9897
                                            ATTN VANGUARD
                                            VANGUARD INDEX TRUST
                                            NAME OF PORTFOLIO
                                            ACCOUNT NUMBER
BEFORE WIRING                               ACCOUNT REGISTRATION
Please contact our        You should notify our Client Services Department of your intended wire
Client Services           purchase, including the federal wire number to be used, by 12:00 noon (Eastern
Department                time). To assure proper receipt, please be sure your bank includes the Portfolio
(1-800-662-2739)          name, the account number Vanguard has assigned to you and the eight digit CoreStates
                          number. If you are opening a new account, please complete the Account
                          Registration Form and mail it to the "New Account" address after completing your
                          wire arrangement. NOTE: Federal Funds wire purchase orders will be accepted
                          only when the Trust and Custodian Banks are open for business.
</TABLE>
 
--------------------------------------------------------------------------------
 
                                       29
<PAGE>   32
 
PURCHASING BY
EXCHANGE (from a
Vanguard account)     Telephone exchanges are not accepted for Vanguard Index
                      Trust. You may, however, open an account by exchange by
                      providing the appropriate information on the Account
                      Registration Form. The new account will have the same
                      registration as the existing account. The Trust reserves
                      the right to refuse any exchange purchase request.
--------------------------------------------------------------------------------
 
PURCHASING BY
FUND EXPRESS
Automatic Investment  The Fund Express Automatic Investment option lets you move
                      money from your bank account to your Vanguard account on
                      the schedule (monthly, bimonthly [every other month],
                      quarterly or yearly) you select. To establish this Fund
                      Express option, please provide the appropriate information
                      on the Account Registration Form. We will send you a
                      confirmation of your Fund Express enrollment; please wait
                      three weeks before using the service.
--------------------------------------------------------------------------------
 
CHOOSING A
DISTRIBUTION
OPTION                You must select one of three distribution options:
 
                      1. AUTOMATIC REINVESTMENT OPTION -- Both dividends and
                         capital gains distributions will be reinvested in
                         additional shares. This option will be selected for you
                         automatically unless you specify one of the other
                         options.
 
                      2. CASH DIVIDEND OPTION -- Your dividends will be paid in
                         cash and your capital gains will be reinvested in
                         additional shares.
 
                      3. ALL CASH OPTION -- Both dividend and capital gains
                         distributions will be paid in cash.
 
                      You may change your option by calling our Client Services
                      Department (1-800-662-2739).
 
                      In addition, an option to invest your cash dividends
                      and/or capital gains distributions in another Vanguard
                      Fund account is available. Please call our Client Services
                      Department (1-800-662-2739) for information. You may also
                      elect Vanguard Dividend Express which allows you to
                      transfer your cash dividends and/or capital gains
                      distributions automatically to your bank account. Please
                      see "Other Vanguard Services" for more information.
--------------------------------------------------------------------------------
 
TAX CAUTION
INVESTORS SHOULD ASK
ABOUT THE TIMING OF
CAPITAL GAINS AND
DIVIDEND DISTRIBUTIONS
BEFORE INVESTING      Under Federal tax laws, the Trust is required to
                      distribute net capital gains and dividend income to Trust
                      shareholders. These distributions are made to all
                      shareholders who own Trust shares as of the distribution's
                      record date, regardless of how long the shares have been
                      owned. Purchasing shares just prior to the record date
                      could have a significant impact on your tax liability for
                      the year. For example, if you purchase shares immediately
                      prior to the record date of a sizable capital gain or
                      income dividend distribution, you will be assessed taxes
                      on the amount of the capital gain and/or dividend
                      distribution later paid even though you owned the Trust
                      shares for just a short period of time. (Taxes are due on
                      the distributions even if the dividend or gain is
                      reinvested in additional Trust shares.) While the total
                      value of your investment will be the same after the
                      distribution -- the amount of the distribution will offset
                      the drop in the net asset value of the shares -- you
                      should be aware of the tax implications the timing of your
                      purchase may have.
 
                                       30
<PAGE>   33
 
                      Prospective investors should, therefore, inquire about
                      potential distributions before investing. The Trust's
                      annual capital gains distribution normally occurs in
                      December, while income dividends are generally paid
                      quarterly for the 500, Total Stock Market, Value and
                      Growth Portfolios in March, June, September & December;
                      annually for the Extended Market and the Small
                      Capitalization Stock Portfolios in December. For
                      additional information on distributions and taxes, see the
                      section titled "Dividends, Capital Gains and Taxes."
--------------------------------------------------------------------------------
 
IMPORTANT
INFORMATION
ESTABLISHING OPTIONAL
SERVICES              The easiest way to establish optional Vanguard services on
                      your account is to select the options you desire when you
                      complete your Account Registration Form. If you wish to
                      add options later, you may need to provide Vanguard with
                      additional information and a signature guarantee. Please
                      call our Client Services Department (1-800-662-2739) for
                      further assistance.
 
SIGNATURE
GUARANTEES            For our mutual protection, we may require a signature
                      guarantee on certain written transaction requests. A
                      signature guarantee verifies the authenticity of your
                      signature and may be obtained from banks, brokers and any
                      other guarantor that Vanguard deems acceptable. A
                      signature guarantee cannot be provided by a notary public.
 
CERTIFICATES          Share certificates will be issued upon request (except for
                      the Total Stock Market, Value and Growth Portfolios). If a
                      certificate is lost, you may incur an expense to replace
                      it.
 
BROKER-DEALER
PURCHASES             If you purchase shares in Vanguard Funds through a
                      registered broker-dealer or investment adviser, the
                      broker-dealer or adviser may charge a service fee.
 
CANCELLING TRADES     The Trust will not cancel any trade (e.g., purchase,
                      exchange or redemption) believed to be authentic, received
                      in writing or by telephone, once the trade request has
                      been received.
 
ELECTRONIC PROSPECTUS
DELIVERY              If you would prefer to receive a prospectus for the Fund
                      or any of the Vanguard Funds in an electronic format,
                      please call 1-800-231-7870 for additional information. If
                      you elect to do so, you may also receive a paper copy of
                      the prospectus, by calling 1-800-662-7447.
--------------------------------------------------------------------------------
 
WHEN YOUR
ACCOUNT WILL BE
CREDITED              Your trade date is the date on which your account is
                      credited. If your purchase is made by check, Federal Funds
                      wire or exchange, and is received by the close of regular
                      trading the New York Stock Exchange (generally 4:00 p.m.
                      Eastern time), your trade date is the day of receipt. If
                      your purchase is received after the close of the Exchange,
                      your trade date is the next business day. Shares of the
                      500, Extended Market, Total Stock Market, Small
                      Capitalization Stock, Value and Growth Portfolios are
                      purchased at the net asset value determined on your trade
                      date. Shares of the Extended Market and Small
                      Capitalization Stock Portfolios are also subject to a 1%
                      portfolio transaction fee while shares of the Total Stock
                      Market Portfolio are subject to a 0.25% portfolio
                      transaction fee. (See "Trust Expenses.") Vanguard will not
                      accept third-party checks to open an account. Please be
                      sure your purchase check is made payable to the Vanguard
                      Group.
 
                                       31
<PAGE>   34
 
                      In order to prevent lengthy processing delays caused by
                      the clearing of foreign checks, Vanguard will only accept
                      a foreign check which has been drawn in U.S. dollars and
                      has been issued by a foreign bank with a U.S.
                      correspondent bank. The name of the U.S. correspondent
                      bank must be printed on the face of the foreign check.
--------------------------------------------------------------------------------
 
SELLING YOUR
SHARES                You may withdraw any portion of the funds in your account
                      by redeeming shares at any time. You may initiate a
                      request by writing or by telephoning. Your redemption
                      proceeds are normally mailed within two business days
                      after the receipt of the request in Good Order.
--------------------------------------------------------------------------------
 
SELLING BY MAIL       Requests should be mailed to VANGUARD FINANCIAL CENTER,
                      VANGUARD INDEX TRUST, P.O. BOX 1120, VALLEY FORGE, PA
                      19482. (For express or registered mail, send your request
                      to Vanguard Financial Center, Vanguard Index Trust, 455
                      Devon Park Drive, Wayne, PA 19087.)
 
                      The redemption price of shares will be the Portfolio's net
                      asset value next determined after Vanguard has received
                      all required documents in Good Order.
--------------------------------------------------------------------------------
 
DEFINITION OF
GOOD ORDER            GOOD ORDER means that the request includes the following:
 
                      1. The account number and Portfolio name.
                      2. The amount of the transaction (specified in dollars or
                         shares).
                      3. Signatures of all owners EXACTLY as they are registered
                         on the account.
                      4. Any required signature guarantees.
                      5. Other supporting legal documentation that might be
                         required, in the case of estates, corporations, trusts
                         and certain other accounts.
                      6. Any certificates that you hold for the account.
 
                      IF YOU HAVE QUESTIONS ABOUT THIS DEFINITION AS IT PERTAINS
                      TO YOUR REQUEST, PLEASE CALL OUR CLIENT SERVICES
                      DEPARTMENT (1-800-662-2739).
--------------------------------------------------------------------------------
 
SELLING BY
TELEPHONE             To sell shares by telephone, you or your pre-authorized
                      representative may call our Client Services Department at
                      1-800-662-2739. The proceeds will be sent to you by mail.
                      Please see "Important Information About Telephone
                      Transactions."
--------------------------------------------------------------------------------
 
SELLING BY FUND
EXPRESS
Automatic
Withdrawal            With the Fund Express Automatic Withdrawal option, money
                      will be automatically moved from your Vanguard Fund
                      account to your bank account according to the schedule you
                      have selected. You may elect Fund Express on the Account
                      Registration Form or call our Investor Information
                      Department (1-800-662-7447) for a Fund Express
                      application.
--------------------------------------------------------------------------------
 
SELLING BY
EXCHANGE              You may sell shares by making an exchange to another
                      Vanguard Fund account. Exchanges to or from Vanguard Index
                      Trust may be made only by mail. Send your exchange request
                      to VANGUARD FINANCIAL CENTER, VANGUARD INDEX TRUST, P.O.
                      BOX 1120, VALLEY FORGE, PA 19482.
--------------------------------------------------------------------------------
 
                                       32
<PAGE>   35
 
IMPORTANT REDEMPTION
INFORMATION           Shares purchased by check or Fund Express may be redeemed
                      at any time. However, your redemption proceeds will not be
                      paid until payment for the purchase is collected, which
                      may take up to ten calendar days.
--------------------------------------------------------------------------------
 
DELIVERY OF
REDEMPTION
PROCEEDS              Redemption requests received by telephone prior to the
                      close of the New York Stock Exchange (generally 4:00 p.m.
                      Eastern time) are processed on the day of receipt and the
                      redemption proceeds are normally sent on the following
                      business day.
 
                      Redemption requests received by telephone after the close
                      of the Exchange are processed on the business day
                      following receipt and the proceeds are normally sent on
                      the second business day following receipt.
 
                      Redemption proceeds must be sent to you within seven days
                      of receipt of your request in Good Order.
 
                      If you experience difficulty in making a telephone
                      redemption during periods of drastic economic or market
                      changes, your redemption request may be made by regular or
                      express mail. It will be implemented at the net asset
                      value next determined after your request has been received
                      by Vanguard in Good Order. The Trust reserves the right to
                      revise or terminate the telephone redemption privilege at
                      any time.
 
                      The Trust may suspend the redemption right or postpone
                      payment at times when the New York Stock Exchange is
                      closed or under any emergency circumstances as determined
                      by the United States Securities and Exchange Commission.
 
                      If the Board of Trustees determines that it would be
                      detrimental to the best interests of the Trust's remaining
                      shareholders to make payment in cash, the Trust may pay
                      redemption proceeds in whole or in part by a distribution
                      in kind of readily marketable securities.
--------------------------------------------------------------------------------
 
VANGUARD'S AVERAGE
COST STATEMENT        If you make a redemption from a qualifying account,
                      Vanguard will send you an Average Cost Statement which
                      provides you with the tax basis of the shares you
                      redeemed. Please see "Other Vanguard Services" for
                      additional information.
--------------------------------------------------------------------------------
 
MINIMUM ACCOUNT
BALANCE REQUIREMENT   Due to the relatively high cost of maintaining smaller
                      accounts, the Trust reserves the right to redeem shares in
                      any account that is below $3,000 ($250 with respect to the
                      500 Portfolio). It is the Trust's current policy that, at
                      any time your total investment in the Extended Market,
                      Total Stock Market, Small Capitalization Stock, Value or
                      Growth Portfolios falls below $3,000 ($250 with respect to
                      the 500 Portfolio), you may be notified that your account
                      is below the Portfolio's minimum account balance
                      requirement. You would then be allowed 60 days to make an
                      additional investment before the account is liquidated.
                      Proceeds would be promptly paid to the registered
                      shareholder. (These minimums do not apply to IRAs, other
                      retirement accounts, and Uniform Gifts/Transfers to Minors
                      Act accounts).
 
                      The Trust minimum account balance requirement will not
                      apply if your account falls below $3,000 ($250 with
                      respect to the 500 Portfolio) solely as a result of
                      declining markets (i.e., a decline in a Portfolio's net
                      asset value).
--------------------------------------------------------------------------------
 
                                       33
<PAGE>   36
 
EXCHANGING YOUR
SHARES                Should your investment goals change, you may exchange your
                      shares of Vanguard Index Trust for those of other
                      available Vanguard Funds. Exchanges to or from Vanguard
                      Index Trust may be made only by mail. TELEPHONE EXCHANGES
                      BETWEEN NON-RETIREMENT ACCOUNTS ARE NOT ACCEPTED FOR THE
                      TRUST.
--------------------------------------------------------------------------------
 
EXCHANGING BY MAIL    Please be sure to include on your exchange request the
                      name and account number of your current Portfolio, the
                      name of the Trust you wish to exchange into, the amount
                      you wish to exchange, and the signatures of all registered
                      account holders. Send your request to VANGUARD FINANCIAL
                      CENTER, VANGUARD INDEX TRUST, P.O. BOX 1120, VALLEY FORGE,
                      PA 19482. (For express or registered mail, send your
                      request to Vanguard Financial Center, Vanguard Index
                      Trust, 455 Devon Park Drive, Wayne, PA 19087.)
--------------------------------------------------------------------------------
 
IMPORTANT EXCHANGE
INFORMATION           Before you make an exchange, you should consider the
                      following:
 
                      - Please read the Fund's prospectus before making an
                        exchange. For a copy and for answers to any questions
                        you may have, call our Investor Information Department
                        (1-800-662-7447).
 
                      - An exchange is treated as a redemption and a purchase.
                        Therefore, you could realize a taxable gain or loss on
                        the transaction.
 
                      - Exchanges are accepted only if the registrations and the
                        Taxpayer Identification numbers of the two accounts are
                        identical.
 
                      - The shares to be exchanged must be on deposit and not
                        held in certificate form.
 
                      - New accounts are not currently accepted in the Vanguard/
                        Windsor Fund or Vanguard/ PRIMECAP Fund.
 
                      - The redemption price of shares redeemed by exchange is
                        the net asset value next determined after Vanguard has
                        received all required documentation in Good Order.
 
                      - When opening a new account by exchange, you must meet
                        the minimum investment requirement of the new Fund.
 
                      Every effort will be made to maintain the exchange
                      privilege. However, the Trust reserves the right to revise
                      or terminate its provisions, limit the amount of or reject
                      any exchange, as deemed necessary, at any time.
--------------------------------------------------------------------------------
 
EXCHANGE
PRIVILEGE
LIMITATIONS           The Trust's exchange privilege is not intended to afford
                      shareholders a way to speculate on short-term movements in
                      the market. Accordingly, in order to prevent excessive use
                      of the exchange privilege that may potentially disrupt the
                      management of the Trust and increase transaction costs,
                      the Trust has established a policy of limiting excessive
                      exchange activity.
 
                      Exchange activity generally will not be deemed excessive
                      if limited to TWO SUBSTANTIVE EXCHANGE REDEMPTIONS (AT
                      LEAST 30 DAYS APART) from a Portfolio of the Trust during
                      any twelve month period. Notwithstanding these
                      limitations, the Trust reserves the right to reject any
                      purchase request (including exchange
 
                                       34
<PAGE>   37
 
                      purchases from other Vanguard portfolios) that is
                      reasonably deemed to be disruptive to efficient portfolio
                      management.
--------------------------------------------------------------------------------
 
IMPORTANT
INFORMATION ABOUT
TELEPHONE
TRANSACTIONS          The ability to initiate redemptions (except wire
                      redemptions) by telephone is automatically established on
                      your account unless you request in writing that telephone
                      transactions on your account not be permitted.
 
                      To protect your account from losses resulting from
                      unauthorized or fraudulent telephone instructions,
                      Vanguard adheres to the following security procedures:
 
                      1. SECURITY CHECK.  To request a transaction by telephone,
                         the caller must know (i) the name of the Portfolio;
                         (ii) the 10-digit account number; (iii) the exact name
                         and address used in the registration; and (iv) the
                         Social Security or Employer Identification number
                         listed on the account.
 
                      2. PAYMENT POLICY.  The proceeds of any telephone
                         redemption by mail will be made payable to the
                         registered shareowner and mailed to the address of
                         record, only.
 
                      Neither the Trust nor Vanguard will be responsible for the
                      authenticity of transaction instructions received by
                      telephone, provided that reasonable security procedures
                      have been followed. Vanguard believes that the security
                      procedures described above are reasonable, and that if
                      such procedures are followed, you will bear the risk of
                      any losses resulting from unauthorized or fraudulent
                      telephone transactions on your account.
--------------------------------------------------------------------------------
 
TRANSFERRING
REGISTRATION          You may transfer the registration of any of your Trust
                      shares to another person by completing a transfer form and
                      sending it to: VANGUARD FINANCIAL CENTER, P.O. BOX 1110,
                      VALLEY FORGE, PA 19482 ATTENTION: TRANSFER DEPARTMENT. The
                      request must be in Good Order. To obtain a transfer form
                      and full instructions, please call our Client Services
                      Department (1-800-662-2739).
--------------------------------------------------------------------------------
 
STATEMENTS AND
REPORTS               Vanguard will send you a confirmation statement each time
                      you initiate a transaction in your account except for
                      checkwriting redemptions from Vanguard money market
                      accounts. You will also receive a comprehensive account
                      statement at the end of each calendar quarter. The
                      fourth-quarter statement will be a year-end statement,
                      listing all transaction activity for the entire calendar
                      year.
 
                      Financial reports on the Trust will be mailed to you
                      semi-annually, according to the Fund's fiscal year-end.
 
                      Vanguard's Average Cost Statement provides you with the
                      average cost of shares redeemed from your account, using
                      the average cost single category method. This service is
                      available for most taxable accounts opened since January
                      1, 1986. In general, investors who redeemed shares from a
                      qualifying Vanguard account may expect to receive their
                      Average Cost Statement in February of the following year.
                      Please call our Client Services Department
                      (1-800-662-2739) for information.
--------------------------------------------------------------------------------
 
                                       35
<PAGE>   38
 
OTHER VANGUARD
SERVICES              For more information about any of these services, please
                      call our Investor Information Department at
                      1-800-662-7447.
 
VANGUARD DIRECT
DEPOSIT SERVICE       With Vanguard's Direct Deposit Service, most U.S.
                      Government checks (including Social Security and military
                      pension checks) and private payroll checks may be
                      automatically deposited into your Vanguard Fund account.
                      Separate brochures and forms are available for direct
                      deposit of U.S. Government and private payroll checks.
 
VANGUARD AUTOMATIC
EXCHANGE SERVICE      Vanguard's Automatic Exchange Service allows you to move
                      money automatically among your Vanguard Fund accounts. For
                      instance, the service can be used to "dollar cost average"
                      from a money market portfolio into a stock or bond fund or
                      to contribute to an IRA or other retirement plan. Please
                      contact our Client Services Department at 1-800-662-2739
                      for additional information.
 
VANGUARD FUND
EXPRESS               Vanguard's Fund Express allows you to transfer money
                      between your Trust account and your account at a bank,
                      savings and loan association, or a credit union that is a
                      member of the Automated Clearing House (ACH) system. You
                      may elect this service on the Account Registration Form or
                      call our Investor Information Department (1-800-662-7447)
                      for a Fund Express application.
 
                      The minimum amount that can be transferred by telephone is
                      $100. However, if you have established one of the
                      automatic options, the minimum amount is $50. The maximum
                      amount that can be transferred using any of the options is
                      $100,000.
 
                      Special rules govern how your Fund Express purchases or
                      redemptions are credited to your account. In addition,
                      some services of Fund Express cannot be used with specific
                      Vanguard Funds. For more information, please refer to the
                      Vanguard Fund Express brochure.
 
VANGUARD DIVIDEND
EXPRESS               Vanguard's Dividend Express allows you to transfer your
                      dividends and/or capital gains distributions automatically
                      from your Trust account, one business day after the
                      Trust's payable date, to your account at a bank, savings
                      and loan association, or a credit union that is a member
                      of the Automated Clearing House (ACH) system. You may
                      elect this service on the Account Registration Form or
                      call the Investor Information Department (1-800-662-7447)
                      for a Vanguard Dividend Express application.
 
VANGUARD
TELE-ACCOUNT          Vanguard's Tele-Account is a convenient, automated service
                      that provides share price, price change and yield
                      quotations on Vanguard Funds through any TouchTone(TM)
                      telephone. This service also lets you obtain information
                      about your account balance, your last transaction, and
                      your most recent dividend or capital gains payment. To
                      contact Vanguard's Tele-Account service, dial
                      1-800-ON-BOARD (1-800-662-6273). A brochure offering
                      detailed operating instructions is available from our
                      Investor Information Department (1-800-662-7447).
--------------------------------------------------------------------------------
 
                                       36
<PAGE>   39
 
                      [THIS PAGE INTENTIONALLY LEFT BLANK]
<PAGE>   40
 
                      [THIS PAGE INTENTIONALLY LEFT BLANK]
<PAGE>   41
 
   
                      [THIS PAGE INTENTIONALLY LEFT BLANK]
    
<PAGE>   42
 
--------------------------------------------------------------------------------
 
   
<TABLE>
<S>                              <C>                                    <C>
                                                                                                          
                                 [VANGUARD INDEX TRUST LOGO]                                   [VANGUARD INDEX TRUST LOGO]
                                 ---------------------------                               P   R   O   S   P   E   C   T   U   S
                                 THE VANGUARD GROUP                                     APRIL 28, 1995; REVISED SEPTEMBER 15, 1995
                                 OF INVESTMENT
                                 COMPANIES                                                                                    
                                 Vanguard Financial Center
                                 P.O. Box 2600
                                 Valley Forge, PA 19482

                                 INVESTOR INFORMATION
                                 DEPARTMENT:
                                 1-800-662-7447 (SHIP)

                                 CLIENT SERVICES
                                 DEPARTMENT:
                                 1-800-662-2739 (CREW)

                                 TELE-ACCOUNT FOR
                                 24-HOUR ACCESS:
                                 1-800-662-6273 (ON-BOARD)

                                 TELECOMMUNICATION SERVICE
                                 FOR THE HEARING-IMPAIRED:
                                 1-800-662-2738                                                                        

                                 TRANSFER AGENT:
                                 The Vanguard Group, Inc.
                                 Vanguard Financial Center
                                 Valley Forge, PA 19482
                                                                                              [THE VANGUARD GROUP LOGO]

      P040
</TABLE>
    
 
--------------------------------------------------------------------------------
<PAGE>   43
 
   
--------------------------------------------------------------------------------
    
 
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
 
[VANGUARD INDEX TRUST LOGO]
                                                  A Member of The Vanguard Group
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
 
   
PROSPECTUS -- APRIL 28, 1995; REVISED SEPTEMBER 15, 1995
    
--------------------------------------------------------------------------------
 
FUND INFORMATION: PARTICIPANT SERVICES -- 1-800-523-1188
--------------------------------------------------------------------------------
 
INVESTMENT
OBJECTIVE AND
POLICIES              Vanguard Index Trust (the "Trust") is an open-end
                      diversified investment company designed as an "index"
                      fund. THE TRUST CONSISTS OF SIX PORTFOLIOS: THE 500,
                      EXTENDED MARKET, TOTAL STOCK MARKET, SMALL CAPITALIZATION
                      STOCK, VALUE AND GROWTH PORTFOLIOS. Each of these
                      Portfolios invests in common stocks in order to match the
                      investment performance of a distinct market index.
--------------------------------------------------------------------------------
 
IMPORTANT NOTE        This Prospectus is intended exclusively for participants
                      in employer-sponsored retirement or savings plans, such as
                      tax-qualified pension and profit-sharing plans and 401(k)
                      thrift plans, as well as 403(b) custodial accounts for
                      non-profit educational and charitable organizations.
                      Another version of this Prospectus, containing information
                      on how to open a personal investment account with the
                      Trust, is available for individual investors. To obtain a
                      copy of that version of the Prospectus, please call
                      1-800-662-7447.
--------------------------------------------------------------------------------
 
OPENING AN
ACCOUNT               A Portfolio of the Trust is an investment option under a
                      retirement or savings program sponsored by your employer.
                      The administrator of your retirement plan or your employee
                      benefits office can provide you with detailed information
                      on how to participate in your plan and how to elect a
                      Portfolio of the Trust as an investment option.
 
                      If you have any questions about the Trust, please contact
                      Participant Services at 1-800-523-1188. If you have any
                      questions about your plan account, contact your plan
                      administrator or the organization that provides
                      recordkeeping services for your plan.
--------------------------------------------------------------------------------
 
   
ABOUT THIS
PROSPECTUS            This Prospectus is designed to set forth concisely the
                      information you should know about the Trust before you
                      invest. It should be retained for future reference. A
                      "Statement of Additional Information" containing
                      additional information about the Trust has been filed with
                      the Securities and Exchange Commission. This Statement is
                      dated April 28, 1995; revised September 15, 1995 and has
                      been incorporated by reference into this Prospectus. A
                      copy may be obtained without charge by writing to the
                      Trust or by calling the Investor Information Department.
    
--------------------------------------------------------------------------------
 
TABLE OF CONTENTS
 
   
<TABLE>
<S>                                        <C>                                        <C>
                                  Page                                       Page                                       Page
Highlights .......................  2      Investment Risks ................. 14      Performance Record ............... 23
Trust Expenses ...................  4      Who Should Invest ................ 15      Dividends, Capital Gains
Financial Highlights .............  6      Implementation of Policies ....... 16         and Taxes ..................... 24
Yield and Total Return ........... 10      Investment Limitations ........... 21      The Share Price of Each
Investment Objectives ............ 10      Management of the Trust .......... 22         Portfolio ..................... 25
Investment Policies .............. 12      Investment Adviser ............... 22      General Information .............. 25
                                                                                      Service Guide .................... 26
</TABLE>
    
 
--------------------------------------------------------------------------------
 
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION, NOR HAS THE SECURITIES
AND EXCHANGE COMMISSION OR ANY STATE COMMISSION PASSED UPON THE ACCURACY OR
ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL
OFFENSE.
--------------------------------------------------------------------------------
 
--------------------------------------------------------------------------------
<PAGE>   44
 
                                   HIGHLIGHTS
 
OBJECTIVE AND
POLICIES
                      The Trust is an open-end diversified investment company
                      designed as an "index" fund. Shares of the Trust are
                      offered on a no-load basis, although the Trust incurs
                      certain distribution expenses. The Trust consists of six
                      separate Portfolios, each of which invests in common
                      stocks in order to match the performance of a selected
                      market index. There is no assurance, however, that the
                      Trust will achieve its stated objective.           PAGE 10
--------------------------------------------------------------------------------
 
SIX SEPARATE
PORTFOLIOS            Investors may choose to invest in any of six Portfolios of
                      the Trust:
 
                      500 PORTFOLIO -- seeks to match the investment performance
                      of the Standard & Poor's 500 Composite Stock Price Index,
                      an index emphasizing large-capitalization stocks.
 
                      EXTENDED MARKET PORTFOLIO -- seeks to match the investment
                      performance of the Wilshire 4500 Index, an index
                      consisting of medium- and small-capitalization stocks.
 
                      TOTAL STOCK MARKET PORTFOLIO -- seeks to match the
                      investment performance of the Wilshire 5000 Index, an
                      index consisting of all regularly and publicly traded U.S.
                      stocks.
 
                      SMALL CAPITALIZATION STOCK PORTFOLIO -- seeks to match the
                      investment performance of the Russell 2000 Small Stock
                      Index, an index consisting of 2,000 small-capitalization
                      common stocks.
 
                      VALUE PORTFOLIO -- seeks to match the investment
                      performance of the S&P/BARRA Value Index, an index
                      consisting of stocks selected from the Standard & Poor's
                      500 Index with lower than average ratios of market price
                      to book value.
 
                      GROWTH PORTFOLIO -- seeks to match the investment
                      performance of the S&P/BARRA Growth Index, an index
                      consisting of stocks selected from the Standard & Poor's
                      500 Index with higher than average ratios of market price
                      to book value.                                     PAGE 10
--------------------------------------------------------------------------------
 
   
RISK
CHARACTERISTICS       As mutual funds investing in common stocks, all six
                      Portfolios of the Trust are subject to market risk, which
                      is the possibility that common stock prices will decline,
                      sometimes substantially over short or extended periods.
                      Due to differences in the securities they hold, the six
                      Portfolios may exhibit varying levels of volatility. 
                                                                         PAGE 14
    
--------------------------------------------------------------------------------
 
   
THE VANGUARD
GROUP                 The Trust is a member of The Vanguard Group of Investment
                      Companies, a group of more than 30 investment companies
                      with more than 80 distinct investment portfolios and total
                      assets in excess of $130 billion. The Vanguard Group, Inc.
                      ("Vanguard"), a subsidiary jointly owned by the Vanguard
                      Funds, provides all corporate management, administrative,
                      distribution and shareholder accounting services on an
                      at-cost basis to the Funds in the Group.           PAGE 22
    
--------------------------------------------------------------------------------
 
INVESTMENT
ADVISER               The Trust receives investment advisory services on an
                      at-cost basis from Vanguard's Core Management Group. As a
                      result, the Trust receives its investment advisory
                      services at a substantially lower cost than would be
                      possible if the Trust paid an investment advisory fee to
                      an external investment adviser.                    PAGE 22
--------------------------------------------------------------------------------
 
                                        2
<PAGE>   45
 
   
FEES AND EXPENSES     A portfolio transaction fee of 1% is deducted from
                      purchases of the Small Capitalization Stock Portfolio; a
                      0.5% portfolio transaction fee is deducted from purchases
                      of the Extended Market Portfolio; and a 0.25% portfolio
                      transaction fee is deducted from purchases of the Total
                      Stock Market Portfolio. Portfolio transaction fees are
                      paid to the Portfolios to offset transaction costs of
                      buying securities of small- and medium-sized
                      companies.                                          PAGE 4
    
--------------------------------------------------------------------------------
 
DIVIDEND POLICY       The Trust distributes substantially all of its net
                      investment income in the form of dividends. The 500, Total
                      Stock Market, Value and Growth Portfolios distribute
                      dividends quarterly, whereas the Extended Market and Small
                      Capitalization Stock Portfolios distribute dividends
                      annually. In all six Portfolios, net capital gains, if
                      any, are distributed annually.                     PAGE 24
--------------------------------------------------------------------------------
 
   
SPECIAL
CONSIDERATIONS        (1) Each Portfolio may invest a portion of its assets in
                          futures contracts, options, convertible securities &
                          swap agreements.                               PAGE 20
    
 
                      (2) Each Portfolio may invest in short-term fixed income
                          securities.                                    PAGE 19
 
   
                      (3) Each Portfolio may lend its securities.        PAGE 21
    
 
                      (4) Each Portfolio may borrow money.               PAGE 21
--------------------------------------------------------------------------------
 
                                        3
<PAGE>   46
 
TRUST EXPENSES        The following table illustrates all expenses and fees that
                      you would incur as a shareholder of the Trust. The
                      expenses and fees are for the fiscal year ended December
                      31, 1994.
 
<TABLE>
<CAPTION>
                                                                          TOTAL                                    SMALL
                               SHAREHOLDER                  EXTENDED      STOCK                                CAPITALIZATION
                               TRANSACTION        500        MARKET      MARKET        VALUE       GROWTH          STOCK
                                 EXPENSES      PORTFOLIO    PORTFOLIO   PORTFOLIO    PORTFOLIO    PORTFOLIO      PORTFOLIO+
                              <S>              <C>          <C>         <C>          <C>          <C>          <C>            <C>
                              ------------------------------------------------------------------------------------------
                              Sales Load
                                Imposed on
                                Purchases...        None        None***      None**       None         None              None*
                              Sales Load
                                Imposed
                                on
                                Reinvested
                                Dividends...        None        None         None         None         None              None
                              Redemption
                                Fees........        None        None         None         None         None              None
                              Exchange
                                Fees........        None        None         None         None         None              None
</TABLE>
 
                        * Shareholders are charged a 1% portfolio transaction
                          fee, payable directly to the Portfolio, on each
                          purchase of shares.
                       ** Shareholders are charged a 0.25% portfolio transaction
                          fee, payable directly to the Portfolio, on each
                          purchase of shares.
                      *** Shareholders are charged a 0.5% portfolio transaction
                          fee, payable directly to the Portfolio, on each
                          purchase of shares.
                        + Formerly Vanguard Small Capitalization Stock Fund,
                          Inc.
 
<TABLE>
<CAPTION>
                                                                          TOTAL                                    SMALL
                               ANNUAL FUND                  EXTENDED      STOCK                                CAPITALIZATION
                                OPERATING         500        MARKET      MARKET        VALUE       GROWTH          STOCK
                                 EXPENSES      PORTFOLIO    PORTFOLIO   PORTFOLIO    PORTFOLIO    PORTFOLIO      PORTFOLIO+
                              <S>              <C>          <C>         <C>          <C>          <C>          <C>            <C>
                              ------------------------------------------------------------------------------------------
                              Management &
                               Administrative
                               Expenses++...       0.16%       0.15%        0.14%        0.14%        0.07%             0.12%
                              Investment
                                Advisory
                                Fees........        0.00        0.01         0.01         0.01         0.06              0.01
                              12b-1 Fees....        None        None         None         None         None              None
                              Other Expenses
                                Distribution
                                 Costs......        0.02        0.02         0.02         0.02         0.02              0.02
                                Miscellaneous
                                 Expenses...        0.01        0.02         0.03         0.03         0.05              0.02
                                                   -----       -----        -----        -----        -----             -----
                              Total Other
                                Expenses....        0.03        0.04         0.05         0.05         0.07              0.04
                                                   -----       -----        -----        -----        -----             -----
                                  Total
                                   Operating
                                 Expenses...       0.19%       0.20%        0.20%        0.20%        0.20%             0.17%
                                                   -----       -----        -----        -----        -----             -----
                                                   -----       -----        -----        -----        -----             -----
</TABLE>
 
                       + Formerly Vanguard Small Capitalization Stock Fund, Inc.
                      ++ In addition to these costs, each Portfolio assesses an
                         annual account maintenance fee of $10. This fee will be
                         waived for shareholders with an account balance of
                         $10,000 or more.
 
                      The purpose of this table is to assist you in
                      understanding the various costs and expenses that you
                      would bear directly or indirectly as an investor in the
                      Trust.
 
THREE PORTFOLIOS
ASSESS TRANSACTION
FEES
                      The Small Capitalization Stock Portfolio assesses a
                      portfolio transaction fee on purchases of Portfolio shares
                      equal to 1% of the dollar amount invested; the Extended
                      Market Portfolio assesses a portfolio transaction fee
                      equal to 0.5% of the dollar amount invested; and the Total
                      Stock Market Portfolio assesses a portfolio transaction
                      fee equal to 0.25% of the dollar amount invested. The
                      portfolio transaction fees are paid to the respective
                      Portfolio, not to Vanguard. They are not sales charges.
 
                                        4
<PAGE>   47
 
                      These fees apply to initial investments in the Extended
                      Market, Small Capitalization Stock and Total Stock Market
                      Portfolios and all subsequent purchases (including
                      purchases made by exchange from another Vanguard Fund or
                      from the other portfolios of the Trust), but not to
                      reinvested dividend or capital gains distributions.
                      Portfolio transaction fees are deducted automatically from
                      the amount invested; they cannot be paid separately.
 
                      The purpose of these transaction fees is to allocate
                      transaction costs associated with new purchases to
                      investors making those purchases, thus insulating existing
                      shareholders from those transaction costs. These costs
                      include: (1) brokerage costs; (2) market impact
                      costs -- i.e., the increase in market prices which may
                      result when the Portfolio purchases thinly traded stocks;
                      and, most importantly, (3) the effect of the "bid-ask"
                      spread in the over-the-counter market. (Securities in the
                      over-the-counter market are bought at the "ask" or
                      purchase price, but are valued in the Portfolio at the
                      mean of the "bid," or sale, and "ask" prices.)
 
                      The 1%, 0.5% and 0.25% fees represent Vanguard's estimate
                      of the brokerage and other transaction costs incurred by
                      the Small Capitalization Stock, Extended Market and Total
                      Stock Market Portfolios in acquiring stocks of mid-sized
                      and small capitalization companies. Without the fees, the
                      three Portfolios, which incur these costs directly, would
                      experience reduced investment performance for all
                      shareholders in each Portfolio. With the fees, the
                      transaction costs of acquiring additional stocks are borne
                      not by all existing shareholders, but by those investors
                      making additional purchases. Because the purchaser, not
                      the Portfolios, bears these costs, the Portfolios are
                      expected to track their respective benchmark indexes more
                      closely.
 
   
500 PORTFOLIO         The Portfolio reserves the right to deduct a portfolio
                      transaction fee, ranging from 0.10% to 0.25%, from
                      purchases of shares of the Portfolio, if such purchase or
                      cumulative purchases are of a size that is reasonably
                      deemed to be disruptive to efficient portfolio management.
                      The fee will be paid to the Portfolio to offset
                      transaction costs of buying securities. The fee is not
                      paid to Vanguard and is not a sales charge. It is not
                      expected that the 500 Portfolio would deduct a portfolio
                      transaction fee on amounts of less than $10 million.
    
 
                      The following example illustrates the expenses that you
                      would incur on a $1,000 investment over various time
                      periods, assuming (1) a 5% annual rate of return and (2)
                      redemption at the end of each period. The example includes
                      the $10 account maintenance fee for each Portfolio; the 1%
                      portfolio transaction fee for the Small Capitalization
                      Stock Portfolio; the 0.5% portfolio transaction fee for
                      the Extended Market Portfolio; and the 0.25% transaction
                      fee for the Total Stock Market Portfolio. As noted in the
                      table on the previous page, the Trust charges no
                      redemption fees of any kind.
 
                                        5
<PAGE>   48
 
<TABLE>
<CAPTION>
                                                                 1 YEAR    3 YEARS    5 YEARS    10 YEARS
                        <S>                                      <C>       <C>        <C>        <C>
                                                                  -----     ------     ------     -------
                        500 Portfolio.........................    $ 12       $36        $60        $123
                        Extended Market Portfolio.............    $ 17       $41        $66        $129
                        Total Stock Market Portfolio..........    $ 15       $39        $63        $127
                        Growth Portfolio......................    $ 12       $36        $61        $124
                        Value Portfolio.......................    $ 12       $36        $61        $124
                        Small Capitalization Stock
                          Portfolio...........................    $ 22       $45        $69        $131
</TABLE>
 
                      Included in these estimates are account maintenance fees
                      of $10, $30, $50 and $100 for the respective periods
                      shown. Accordingly, for investments larger than $1,000,
                      your total expenses will be substantially lower in
                      percentage terms than this illustration implies.
 
                      THIS EXAMPLE SHOULD NOT BE CONSIDERED A REPRESENTATION OF
                      PAST OR FUTURE EXPENSES OR PERFORMANCE. ACTUAL EXPENSES
                      MAY BE HIGHER OR LOWER THAN THOSE SHOWN.
--------------------------------------------------------------------------------
 
FINANCIAL
HIGHLIGHTS            The following financial highlights for a share outstanding
                      throughout each period, insofar as they relate to each of
                      the five years ended December 31, 1994, have been audited
                      by Price Waterhouse LLP, independent accountants, whose
                      reports thereon were unqualified. This financial
                      information should be read in conjunction with the Trust's
                      financial statements and notes thereto, which are
                      incorporated by reference in the Statement of Additional
                      Information and in this Prospectus, and which appear,
                      along with the reports of Price Waterhouse LLP, in the
                      Trust's 1994 Annual Report to Shareholders and inserts
                      thereto. For a more complete discussion of the Trust's
                      performance, please see the Trust's 1994 Annual Report to
                      Shareholders, which may be obtained free of charge by
                      writing to the Trust or calling Participant Services at
                      1-800-523-1188.
 
                                        6
<PAGE>   49
 
<TABLE>
<CAPTION>
                                                 ---------------------------------------------------------------------------------
                                                                       500 PORTFOLIO
                                                 ---------------------------------------------------------------------------------
                                                                   YEAR ENDED DECEMBER 31,
                                                 ---------------------------------------------------------------------------------
                                     1994      1993      1992      1991     1990     1989     1988     1987     1986     1985
<S>                                <C>       <C>       <C>       <C>      <C>      <C>      <C>      <C>      <C>      <C>    
------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE,
  BEGINNING OF YEAR..............  $43.83    $40.97    $39.32    $31.24   $33.64   $27.18   $24.65   $24.27   $22.99   $19.52
                                   ------    ------    ------    ------   ------   ------   ------   ------   ------   ------
INVESTMENT OPERATIONS
  Net Investment Income..........    1.18      1.13      1.12      1.15     1.17     1.20     1.08      .88      .89      .91
  Net Realized and Unrealized
    Gain
    (Loss) on Investments........    (.67)     2.89      1.75      8.20    (2.30)    7.21     2.87      .36     3.30     5.08
                                   ------    ------    ------    ------   ------   ------   ------   ------   ------   ------
    TOTAL FROM INVESTMENT
      OPERATIONS.................     .51      4.02      2.87      9.35    (1.13)    8.41     3.95     1.24     4.19     5.99
------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
  Dividends from Net Investment
    Income.......................   (1.17)    (1.13)    (1.12)    (1.15)   (1.17)   (1.20)   (1.10)    (.69)    (.89)    (.91)
  Distributions from Realized
    Capital Gains................    (.20)     (.03)     (.10)     (.12)    (.10)    (.75)    (.32)    (.17)   (2.02)   (1.61)
                                   ------    ------    ------    ------   ------   ------   ------   ------   ------   ------
    TOTAL DISTRIBUTIONS..........   (1.37)    (1.16)    (1.22)    (1.27)   (1.27)   (1.95)   (1.42)    (.86)   (2.91)   (2.52)
------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF YEAR.....  $42.97    $43.83    $40.97    $39.32   $31.24   $33.64   $27.18   $24.65   $24.27   $22.99
------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------
TOTAL RETURN*....................    1.18%     9.89%     7.42%    30.22%   (3.32)%  31.36%   16.22%    4.71%   18.06%   31.23%
------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Year
  (Millions).....................  $9,356    $8,273    $6,547    $4,345   $2,173   $1,804   $1,055     $826     $485     $394
Ratio of Expenses to Average
  Net Assets.....................     .19%      .19%      .19%      .20%     .22%     .21%     .22%     .26%     .28%     .28%
Ratio of Net Investment Income to
  Average Net Assets.............    2.72%     2.65%     2.81%     3.07%    3.60%    3.62%    4.08%    3.15%    3.40%    4.09%
Portfolio Turnover Rate..........       6%+       6%+       4%+       5%+     23%+      8%      10%      15%      29%      36%
</TABLE>
 
* Total return figures do not reflect the annual account maintenance fee of $10.
+ Portfolio turnover rates excluding in-kind redemptions were 4%, 2%, 1%, 1% and
  6%, respectively.
 
<TABLE>
<CAPTION>
                                                     ----------------------------------------------------------------------
                                                                            EXTENDED MARKET PORTFOLIO
                                                     ----------------------------------------------------------------------
                                                                     YEAR ENDED DECEMBER 31,
                                                    ----------------------------------------------------------         DEC. 21+,
                                                 1994      1993      1992      1991      1990      1989      1988     TO 31, 1987
<S>                                             <C>       <C>       <C>       <C>       <C>       <C>       <C>       <C>
------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, BEGINNING OF PERIOD..........  $19.43    $17.35    $15.82    $11.48    $13.92    $11.60     $9.99       $10.00
                                                ------    ------    ------    ------    ------    ------    ------    ---------
INVESTMENT OPERATIONS
  Net Investment Income.......................     .28       .23       .24       .25       .30       .26       .34          .03
  Net Realized and Unrealized Gain
    (Loss) on Investments.....................    (.62)     2.28      1.72      4.54     (2.25)     2.52      1.63         (.04)
                                                ------    ------    ------    ------    ------    ------    ------     --------
    TOTAL FROM INVESTMENT OPERATIONS..........    (.34)     2.51      1.96      4.79     (1.95)     2.78      1.97         (.01)
------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
  Dividends from Net Investment Income........    (.28)     (.23)     (.25)     (.25)     (.33)     (.23)     (.20)          --
  Distributions from Realized Capital Gains...    (.29)     (.20)     (.18)     (.20)     (.16)     (.23)     (.16)          --
                                                ------    ------    ------    ------    ------    ------    ------     --------
    TOTAL DISTRIBUTIONS.......................    (.57)     (.43)     (.43)     (.45)     (.49)     (.46)     (.36)          --
------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD................  $18.52    $19.43    $17.35    $15.82    $11.48    $13.92    $11.60        $9.99
------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------
TOTAL RETURN*.................................   (1.76)%   14.49%    12.47%    41.85%   (14.05)%   24.10%    19.75%       (0.10)%
------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Period (Millions)..........    $967      $928      $585      $372      $179      $147       $35           $5
Ratio of Expenses to Average Net Assets.......     .20%      .20%      .20%      .19%      .23%      .23%      .24%           0%
Ratio of Net Investment Income to Average
  Net Assets..................................    1.51%     1.48%     1.73%     2.14%     2.68%     2.92%     2.90%           0%
Portfolio Turnover Rate.......................      19%       13%        9%       11%        9%       14%       26%           3%
</TABLE>
 
* Total return figures do not reflect the annual account maintenance fee of $10
  or applicable portfolio transaction fees.
+ Commencement of operations.
 
                                        7
<PAGE>   50
 
<TABLE>
<CAPTION>
                                                                     --------------------------------------------------
                                                                                TOTAL STOCK MARKET PORTFOLIO
                                                                     --------------------------------------------------
                                                                     YEAR ENDED DECEMBER 31,          MARCH 16+, 1992,
                                                                     1994               1993        TO DECEMBER 31, 1992
<S>                                                                 <C>                <C>          <C>                  
------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, BEGINNING OF PERIOD..............................  $11.69             $10.84              $10.00
                                                                    ------             ------       -------------
INVESTMENT OPERATIONS
  Net Investment Income...........................................     .27                .26                 .23
  Net Realized and Unrealized Gain (Loss) on Investments..........    (.29)               .88                 .84
                                                                    ------             ------       -------------
    TOTAL FROM INVESTMENT OPERATIONS..............................    (.02)              1.14                1.07
------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
  Dividends from Net Investment Income............................    (.27)              (.26)               (.23)
  Distributions from Realized Capital Gains.......................    (.03)              (.03)                 --
                                                                    ------             ------       -------------
    TOTAL DISTRIBUTIONS...........................................    (.30)              (.29)               (.23)
------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD....................................  $11.37             $11.69              $10.84
------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------
TOTAL RETURN**....................................................   (0.17)%            10.62%              10.41%
------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Period (Millions)..............................    $786               $512                $275
Ratio of Expenses to Average Net Assets...........................     .20%               .20%                .21%*
Ratio of Net Investment Income to Average Net Assets..............    2.35%              2.31%               2.42%*
Portfolio Turnover Rate...........................................       2%                 1%                  3%
</TABLE>
 
 * Annualized.
** Total return figures do not reflect the annual account maintenance fee of $10
   or applicable portfolio transaction fees.
 + Commencement of operations.
 
<TABLE>
<CAPTION>
                                                                     --------------------------------------------------
                                                                                      GROWTH PORTFOLIO
                                                                     --------------------------------------------------
                                                                     YEAR ENDED DECEMBER 31,         NOVEMBER 2+, 1992,
                                                                     1994               1993        TO DECEMBER 31, 1992
<S>                                                                 <C>                <C>          <C>                  
------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, BEGINNING OF PERIOD..............................  $10.20             $10.26              $10.00
                                                                    ------             ------       -------------
INVESTMENT OPERATIONS
  Net Investment Income...........................................     .21                .21                 .06
  Net Realized and Unrealized Gain (Loss) on Investments..........     .08               (.06)                .26
                                                                    ------             ------       -------------
    TOTAL FROM INVESTMENT OPERATIONS..............................     .29                .15                 .32
------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
  Dividends from Net Investment Income............................    (.21)              (.21)               (.06)
  Distributions from Realized Capital Gains.......................      --                 --                  --
                                                                    ------             ------       -------------
    TOTAL DISTRIBUTIONS...........................................    (.21)              (.21)               (.06)
------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD....................................  $10.28             $10.20              $10.26
------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------
TOTAL RETURN**....................................................    2.89%              1.53%               3.19%
------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Period (Millions)..............................     $86                $51                 $21
Ratio of Expenses to Average Net Assets...........................     .20%               .20%                  0%*
Ratio of Net Investment Income to Average Net Assets..............    2.08%              2.10%               2.85%*
Portfolio Turnover Rate...........................................      28%                36%                  2%
</TABLE>
 
 * Annualized.
** Total return figures do not reflect the annual account maintenance fee of
   $10.
 + Commencement of operations.
 
                                        8
<PAGE>   51
 
<TABLE>
<CAPTION>
                                                                     --------------------------------------------------
                                                                                      VALUE PORTFOLIO
                                                                     --------------------------------------------------
                                                                     YEAR ENDED DECEMBER 31,         NOVEMBER 2+, 1992,
                                                                     1994               1993        TO DECEMBER 31, 1992
<S>                                                                 <C>                <C>          <C>                  
------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, BEGINNING OF PERIOD..............................  $11.74             $10.30              $10.00
                                                                    ------             ------       -------------
INVESTMENT OPERATIONS
  Net Investment Income...........................................     .38                .38                 .07
  Net Realized and Unrealized Gain (Loss) on Investments..........    (.46)              1.50                 .30
                                                                    ------             ------       -------------
    TOTAL FROM INVESTMENT OPERATIONS..............................    (.08)              1.88                 .37
------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
  Dividends from Net Investment Income............................    (.38)              (.38)               (.07)
  Distributions from Realized Capital Gains.......................    (.16)              (.06)                 --
                                                                    ------             ------       -------------
    TOTAL DISTRIBUTIONS...........................................    (.54)              (.44)               (.07)
------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD....................................  $11.12             $11.74              $10.30
------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------
TOTAL RETURN**....................................................   (0.73)%            18.35%               3.70%
------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Period (Millions)..............................    $297               $190                 $24
Ratio of Expenses to Average Net Assets...........................     .20%               .20%                  0%*
Ratio of Net Investment Income to Average Net Assets..............    3.37%              3.26%               3.46%*
Portfolio Turnover Rate...........................................      32%                30%                  4%
</TABLE>
 
 * Annualized.
** Total return figures do not reflect the annual account maintenance fee of 
   $10.
 + Commencement of operations.

<TABLE>
<CAPTION>
                                     ---------------------------------------------------------------------------------------
                                                                SMALL CAPITALIZATION STOCK PORTFOLIO*
                                     ---------------------------------------------------------------------------------------
                                     FEB. 1 TO   OCT. 1, 1993                       YEAR ENDED SEPTEMBER 30,
                                     DEC. 31,    TO JAN. 31,    -------------------------------------------------------------------
                                       1994          1994        1993      1992      1991     1990(1)    1989+      1988       1987
<S>                                  <C>         <C>            <C>       <C>       <C>       <C>        <C>       <C>        <C>
------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, BEGINNING OF
 PERIOD..............................   $16.24      $16.23      $12.63    $12.03     $8.55     $11.88    $11.96     $15.73    $13.24
                                      -------    ---------      ------    ------    ------     ------    ------     ------    ------
INVESTMENT OPERATIONS
 Net Investment Income (Loss)........      .20         .05         .20       .19       .20        .17       .10        .03     (.04)
 Net Realized and Unrealized Gain
   (Loss) on Investments.............     (.86)        .96        3.73       .88      3.60      (3.46)     2.13      (2.59)     4.42
                                       ------     --------       -----     -----     -----      -----     -----      -----     -----
   TOTAL FROM INVESTMENT
     OPERATIONS......................     (.66)       1.01        3.93      1.07      3.80      (3.29)     2.23      (2.56)     4.38
------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
 Dividends from Net Investment
   Income............................     (.22)       (.18)       (.18)     (.18)     (.18)      (.04)    (.14)         --        --
 Distributions from Realized
   Capital Gains.....................     (.37)       (.82)       (.15)     (.29)     (.14)        --     (2.17)     (1.21)   (1.89)
                                       ------     --------       -----     -----     -----      -----     -----      -----     -----
   TOTAL DISTRIBUTIONS...............     (.59)      (1.00)       (.33)     (.47)     (.32)      (.04)    (2.31)     (1.21)   (1.89)
------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD.......   $14.99      $16.24      $16.23    $12.63    $12.03      $8.55    $11.88     $11.96    $15.73
------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------
TOTAL RETURN++.......................    (4.00)%      6.65%      31.60%     9.34%    45.91%    (27.73)%   18.83%    (14.30)%  38.02%
------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Period
 (Millions)..........................     $605        $533        $432      $202      $111        $40       $20        $27       $35
Ratio of Expenses to Average
 Net Assets..........................      .17%**      .18%**      .18%      .18%      .21%       .31%     1.00%       .95%     .92%
Ratio of Net Investment Income
 (Loss) to Average Net Assets........     1.50%**     1.16%**     1.47%     1.65%     2.11%      1.91%      .65%       .24%   (.25%)
Portfolio Turnover Rate..............       25%          5%         26%       26%       33%        40%      160%        68%      92%
 
<CAPTION>
                            ----------------------------------------
                              SMALL CAPITALIZATION STOCK PORTFOLIO*
                            ----------------------------------------
                                   YEAR ENDED SEPTEMBER 30,
                            ----------------------------------------
                                        1986      1985
<S>                                  <C>         <C>     
-------------------------------------
NET ASSET VALUE, BEGINNING OF
 PERIOD..............................  $11.68     $13.15
                                       ------     ------
INVESTMENT OPERATIONS
 Net Investment Income (Loss)........    (.01)      (.04)
 Net Realized and Unrealized Gain
   (Loss) on Investments.............    1.57       (.51)
                                        -----      -----
   TOTAL FROM INVESTMENT
     OPERATIONS......................    1.56       (.55)
-------------------------------------
DISTRIBUTIONS
 Dividends from Net Investment
   Income............................      --       (.15)
 Distributions from Realized
   Capital Gains.....................      --       (.77)
                                        -----      -----
   TOTAL DISTRIBUTIONS...............      --       (.92)
-------------------------------------
NET ASSET VALUE, END OF PERIOD.......  $13.24     $11.68
-------------------------------------
-------------------------------------
TOTAL RETURN++.......................   13.33%     (3.67)%
-------------------------------------
-------------------------------------
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Period
 (Millions)..........................     $31        $32
Ratio of Expenses to Average
 Net Assets..........................     .92%      1.00%
Ratio of Net Investment Income
 (Loss) to Average Net Assets........    (.06%)     (.28%)
Portfolio Turnover Rate..............      92%       103%
</TABLE>
 
(1) Adjusted to reflect a 3-for-1 stock split as of February 3, 1990.
  * Results prior to January 31, 1994, are for the former Vanguard Small
    Capitalization Stock Fund.
 ** Annualized.
  + Prior to September 11, 1989, Schroder Capital Management International
    provided investment advisory services to the Fund. Effective September 11,
    1989, The Vanguard Group, Inc. began providing investment advisory services 
    to the Fund on an at-cost basis.
 ++ Total return figures do not reflect the annual account maintenance fees of
    $10 or applicable portfolio transaction fees.
--------------------------------------------------------------------------------
 
                                        9
<PAGE>   52
 
YIELD AND TOTAL
RETURN                From time to time a Portfolio of the Trust may advertise
                      its yield and total return. Both yield and total return
                      figures are based on historical earnings and are not
                      intended to indicate future performance. The "total
                      return" of a Portfolio refers to the average annual
                      compounded rates of return over one-, five- and ten-year
                      periods or for the life of the Portfolio (as stated in the
                      advertisement) that would equate an initial amount
                      invested at the beginning of a stated period to the ending
                      redeemable value of the investment, assuming the
                      reinvestment of all dividend and capital gains
                      distributions.
 
                      In accordance with industry guidelines set forth by the
                      U.S. Securities and Exchange Commission, the "30-day
                      yield" of a Portfolio is calculated by dividing the net
                      investment income per share earned during a 30-day period
                      by the net asset value per share on the last day of the
                      period. Net investment income includes interest and
                      dividend income earned on a Portfolio's securities; it is
                      net of all expenses and all recurring and nonrecurring
                      charges that have been applied to all shareholder
                      accounts. The yield calculation assumes that net
                      investment income earned over 30 days is compounded
                      monthly for six months and then annualized. Methods used
                      to calculate advertised yields are standardized for all
                      stock and bond mutual funds. However, these methods differ
                      from the accounting methods used by a Portfolio to
                      maintain its books and records, and so the advertised
                      30-day yield may not fully reflect the income paid to your
                      own account.
 
                      Additionally, the Portfolios may compare their performance
                      to that of their comparative indexes. The target
                      benchmarks include the Standard & Poor's 500 Composite
                      Stock Price Index, the Wilshire 4500 Index, the Wilshire
                      5000 Index, the Russell 2000 Small Stock Index, the
                      S&P/BARRA Value Index and the S&P/BARRA Growth Index.
--------------------------------------------------------------------------------
 
INVESTMENT
OBJECTIVES
EACH PORTFOLIO SEEKS TO
MATCH THE INVESTMENT
PERFORMANCE OF ITS
RESPECTIVE INDEX
                      The Trust is a no-load, open-end diversified investment
                      company designed as an "index" fund. The Trust consists of
                      six Portfolios, each of which seeks to provide investment
                      results that correspond to a particular stock market
                      index. The correlation between the performance of each of
                      the Trust's Portfolios and the respective index that each
                      Portfolio attempts to match is expected to be at least
                      0.95. The 500, Extended Market, Total Stock Market and
                      Small Capitalization Stock Portfolios attempt to replicate
                      the investment performance of broad market indexes, while
                      the Value and Growth Portfolios attempt to replicate
                      indexes which possess certain "value" and "growth"
                      investment characteristics.
 
                                       10
<PAGE>   53
 
                      The pie chart below illustrates how, as measured by
                      capitalization, the Standard & Poor's 500 Index, the
                      Wilshire 4500 Index and the Russell 2000 Index cover the
                      entire U.S. equity market, as represented by the Wilshire
                      5000 Index:

                       Total U.S. Equity Market / Wilshire 5000 Index*
                                   as of December 31, 1994

                                Total Stock Market Portfolio
                                        [PIE CHART]

              Extended Market Portfolio                 WILSHIRE 4500 INDEX 30%
              500 Portfolio                             S&P 500 INDEX 70%
              Small Capitalization Stock Portfolio      RUSSELL 2000 INDEX 9%

* Wilshire 500 excludes Royal Dutch Shell and Unilever, N.V. which make up
  approximately 2.3% of the S&P 500 index.


                      - The 500 PORTFOLIO seeks to replicate the aggregate price
                        and yield performance of the Standard & Poor's 500
                        Composite Stock Price Index (the "S&P 500 Index"), an
                        index which emphasizes large-capitalization companies.
 
                      - The EXTENDED MARKET PORTFOLIO seeks to replicate the
                        aggregate price and yield performance of the Wilshire
                        4500 Index, an index which consists of more than 5,000
                        medium- and small-capitalization companies that are not
                        included in the S&P 500 Index.
 
                      - The TOTAL STOCK MARKET PORTFOLIO seeks to replicate the
                        aggregate price and yield performance of the Wilshire
                        5000 Index, an index which consists of all U.S. stocks
                        that trade on a regular basis on either the New York or
                        American Stock Exchange or the NASDAQ over-the-counter
                        market. These stocks include the large-capitalization
                        companies of the S&P 500 Index, with the exception of
                        Royal Dutch and Unilever, N.V., which trade on the New
                        York Stock Exchange as ADR's, as well as the medium- and
                        small-capitalization companies of the Wilshire 4500
                        Index.
 
                      - The SMALL CAPITALIZATION STOCK PORTFOLIO seeks to
                        replicate the aggregate price and yield performance of
                        the Russell 2000 Small Stock Index (the "Russell 2000"),
                        a broadly diversified small-capitalization stock index
                        consisting of approximately 2,000 common stocks.
 
                                       11
<PAGE>   54
 
                      The pie chart below illustrates how, as measured by market
                      capitalization, the S&P 500 Index is divided into the S&P/
                      BARRA Value and S&P/BARRA Growth Indexes.
 
                                S&P 500 Index
                           as of December 31, 1994

                                500 Portfolio
                                 [PIE CHART]

                 Growth Portfolio       S&P/BARRA GROWTH INDEX 50%
                 Value Portfolio        S&P/BARRA VALUE INDEX 50%

                      - The VALUE PORTFOLIO seeks to replicate the aggregate
                        price and yield performance of the S&P/BARRA Value
                        Index, an index which includes stocks in the S&P 500
                        with lower than average ratios of market price to book
                        value. These types of stocks are often referred to as
                        "value" stocks.
 
                      - The GROWTH PORTFOLIO seeks to replicate the aggregate
                        price and yield performance of the S&P/BARRA Growth
                        Index, an index which includes stocks in the S&P 500
                        with higher than average ratios of market price to book
                        value. These types of stocks are often referred to as
                        "growth" stocks.
 
                      There is no assurance that the Portfolios will achieve
                      their stated objectives.
 
                      These investment objectives are fundamental and so cannot
                      be changed without the approval of a majority of a
                      Portfolio's shareholders.
--------------------------------------------------------------------------------
 
INVESTMENT
POLICIES
ALL SIX PORTFOLIOS USE A
"PASSIVE" APPROACH TO
INVEST IN COMMON
STOCKS
                      The six Portfolios of the Trust are not managed according
                      to traditional methods of "active" investment management,
                      which involve the buying and selling of securities based
                      upon economic, financial and market analysis and
                      investment judgment. Instead, the Portfolios, utilizing a
                      "passive" or "indexing" investment approach, attempt to
                      duplicate the investment performance of their respective
                      indexes through statistical procedures. The Portfolios are
                      managed without regard to tax ramifications.
 
                      THE 500 PORTFOLIO invests in all 500 stocks in the S&P 500
                      Index in approximately the same proportions as they are
                      represented in the Index.
 
                      THE EXTENDED MARKET PORTFOLIO invests in a statistically
                      selected sample of the more than 5,000 stocks included in
                      the Wilshire 4500 Index. Typically, the Portfolio invests
                      in 1,400 to 1,700 stocks. Stocks are selected for
                      inclusion in the Portfolio based primarily on market
                      capitalization and industry weightings. The Portfolio is
 
                                       12
<PAGE>   55
 
                      constructed to have aggregate investment characteristics
                      similar to those of the Wilshire 4500 Index.
 
                      THE TOTAL STOCK MARKET PORTFOLIO invests in a
                      statistically selected sample of the more than 6,000
                      stocks included in the Wilshire 5000 Index. Typically, the
                      Portfolio invests in approximately 1,700 stocks. Stocks
                      are selected for inclusion in the Portfolio based
                      primarily on market capitalization and industry
                      weightings. The Portfolio is constructed to have aggregate
                      investment characteristics similar to those of the
                      Wilshire 5000 Index.
 
                      THE SMALL CAPITALIZATION STOCK PORTFOLIO invests in a
                      statistically selected sample of the approximately 2,000
                      stocks included in the Russell 2000 Index. Typically, the
                      Portfolio invests in approximately 1,000 stocks. Stocks
                      are selected for inclusion in the Portfolio based on their
                      contribution to the Portfolio's market capitalization,
                      industry weightings and other fundamental characteristics
                      such as price-earnings ratios, dividend yields,
                      price-to-book ratios and financial leverage. The stocks
                      held by the Portfolio are weighted to make the Portfolio's
                      aggregate investment characteristics similar to those of
                      the Russell 2000 Index as a whole.
 
                      THE VALUE PORTFOLIO invests in all of the common stocks
                      included in the S&P/BARRA Value Index in approximately the
                      same proportions as they are represented in the Index. As
                      of December 31, 1994, the S&P/BARRA Value Index included
                      318 of the stocks that make up the S&P 500 Index, and 50%
                      of the total market value of the Index.
 
                      THE GROWTH PORTFOLIO invests in all of the common stocks
                      included in the S&P/BARRA Growth Index in approximately
                      the same proportions as they are represented in the Index.
                      As of December 31, 1994, the S&P/BARRA Growth Index
                      included 182 of the stocks that make up the S&P 500 Index,
                      and 50% of the total market value of the Index.
 
ALL SIX PORTFOLIOS
ATTEMPT TO REMAIN
FULLY INVESTED
                      Each Portfolio attempts to remain fully invested in common
                      stocks. Under normal circumstances, each Portfolio will
                      invest at least 95% of its assets in the common stocks of
                      its respective index and futures contracts and options.
                      Each Portfolio may invest in certain short-term fixed
                      income securities as cash reserves, although cash or cash
                      equivalents are normally expected to represent less than
                      1% of each Portfolio's assets. Each Portfolio may also
                      invest up to 20% of its assets in stock futures contracts
                      and options in order to invest uncommitted cash balances,
                      to maintain liquidity to meet shareholder redemptions, or
                      to minimize trading costs. The Portfolios will not invest
                      in cash reserves, futures contracts or options as part of
                      a temporary defensive strategy, such as lowering a
                      Portfolio's investment in common stocks to protect against
                      potential stock market declines. The Portfolios intend to
                      remain fully invested, to the extent practicable, in a
                      pool of securities which will duplicate the investment
                      characteristics of their respective indexes. See
                      "Implementation of Policies" for a description of these
                      and other investment practices of the Trust.
 
                      These investment policies are not fundamental and so may
                      be changed by the Board of Trustees without shareholder
                      approval. However, shareholders would be notified prior to
                      a material change in either.
--------------------------------------------------------------------------------
 
                                       13
<PAGE>   56
 
INVESTMENT RISKS
EACH PORTFOLIO IS
SUBJECT TO MARKET     As mutual funds investing primarily in common stocks, the
RISK                  Portfolios of the Trust are subject to market
                      risk -- i.e., the possibility that common stock prices
                      will decline over short or even extended periods. The U.S.
                      stock market tends to be cyclical, with periods when stock
                      prices generally rise and periods when prices generally
                      decline.
 
                      To illustrate the volatility of stock prices, the
                      following table sets forth the extremes for stock market
                      returns as well as the average return for the period from
                      1926 to 1994, as measured by the S&P 500 Composite Stock
                      Price Index:
 
<TABLE>
<CAPTION>
                                                U.S. MARKET RETURNS (1926-1994)
                                                   OVER VARIOUS TIME HORIZONS
                                          --------------------------------------------
                                          1 YEAR     5 YEARS     10 YEARS     20 YEARS
                                          ------     -------     --------     --------
                               <S>        <C>        <C>         <C>          <C>
                               Best       +53.9%      +23.9%       +20.1%       +16.9%
                               Worst      -43.3       -12.5        - 0.9        + 3.1
                               Average    +12.2       +10.2        +10.7        +10.7
</TABLE>
 
                      As shown, common stocks have provided annual total returns
                      (capital appreciation plus dividend income) averaging
                      +10.7% for all 10-year periods from 1926 to 1994. Average
                      return may not be useful for forecasting future returns in
                      any particular period, as stock returns are quite volatile
                      from year to year.
 
THE EXTENDED MARKET,
TOTAL STOCK MARKET AND
SMALL CAPITALIZATION
STOCK PORTFOLIOS
MAY EXHIBIT
GREATER VOLATILITY
                      Historically, medium- and small-capitalization stocks have
                      been more volatile in price than the larger-capitalization
                      stocks included in the S&P 500 Index. Among the reasons
                      for the greater price volatility of these securities are
                      the less certain growth prospects of smaller firms, the
                      lower degree of liquidity in the markets for such stocks,
                      and the greater sensitivity of medium- and small-size
                      companies to changing economic conditions. Besides
                      exhibiting greater volatility, medium- and small-size
                      company stocks may, to a degree, fluctuate independently
                      of larger company stocks. Medium- and small-size company
                      stocks may decline in price as large company stocks rise,
                      or rise in price as large company stocks decline. Medium-
                      and small-size company stocks constitute the investments
                      of the Extended Market Portfolio while the Small
                      Capitalization Stock Portfolio is composed primarily of
                      small-size company stocks. Investors in the Portfolios
                      should therefore expect that the Extended Market and Small
                      Capitalization Stock Portfolios will be more volatile
                      than, and may fluctuate independently of, the 500
                      Portfolio.
 
                      Similarly, medium- and small-size company stocks
                      constituted approximately 31% of the net assets of the
                      Total Stock Market Portfolio on December 31, 1994.
                      Investors in the Portfolio should therefore anticipate
                      somewhat greater price volatility in the Total Stock
                      Market Portfolio relative to the 500 Portfolio.
 
THE VALUE AND GROWTH
PORTFOLIOS MAY
FLUCTUATE
INDEPENDENTLY         Stocks that emphasize particular investment
                      characteristics, such as "value" and "growth," may
                      fluctuate divergently from the broad market as represented
                      by the S&P 500 Index, and may also demonstrate greater
                      volatility over short or extended periods relative to the
                      broad market.
 
                      The S&P/BARRA Value Index maintains a lower price-to-book
                      ratio and historically has had a higher yield than the S&P
                      500 Index, while the S&P/BARRA Growth Index maintains a
                      higher price-to-book and historically has had a lower
                      yield than the
 
                                       14
<PAGE>   57
 
                      S&P 500 Index. Because of these investment
                      characteristics, the S&P/BARRA Value Index has exhibited
                      somewhat less short-term volatility than the S&P 500
                      Index, while the S&P/BARRA Growth Index has displayed
                      somewhat greater short-term volatility than the S&P 500
                      Index from 1975 through 1994. However, as stated above,
                      both Indexes may be more volatile than the S&P 500 Index
                      over short or extended periods. The Indexes have been in
                      existence since May, 1992. Historical performance data was
                      generated by BARRA by constructing the S&P/BARRA Value and
                      Growth Indexes from actual S&P 500 Index holdings.
--------------------------------------------------------------------------------
 
WHO SHOULD INVEST
LONG-TERM INVESTORS
SEEKING A "PASSIVE"
APPROACH FOR INVESTING
IN COMMON STOCKS      All six Portfolios of the Trust are designed for long-term
                      investors seeking the advantages of a low-cost, "passive"
                      approach for investing in a diversified portfolio of
                      common stocks. Unlike other equity mutual funds, which
                      generally seek to "beat" stock market averages with
                      unpredictable results, all six Portfolios seek to "match"
                      their respective indexes and thus are expected to provide
                      a highly predictable return relative to their benchmarks.
 
                      Four Portfolios of the Trust provide a vehicle for
                      investing in a broad market index:
 
                      - THE 500 PORTFOLIO is designed for investors seeking to
                        replicate the total return of the S&P 500 Index, an
                        index emphasizing large-capitalization common stocks.
 
                      - THE EXTENDED MARKET PORTFOLIO is designed for investors
                        seeking to replicate the total return of the Wilshire
                        4500 Index, an index consisting of medium- and
                        small-capitalization companies.
 
                      - THE TOTAL STOCK MARKET PORTFOLIO is designed for
                        investors seeking to replicate the total return of the
                        Wilshire 5000 Index, an index consisting of all U.S.
                        stocks that trade on a regular basis on either the New
                        York or American Stock Exchange or the NASDAQ
                        over-the-counter market. The Total Stock Market
                        Portfolio will therefore reflect the performance of the
                        entire U.S. stock market.
 
                      - THE SMALL CAPITALIZATION STOCK PORTFOLIO is designed for
                        investors seeking to replicate the total return of the
                        Russell 2000 Small Stock Index, an index consisting of
                        approximately 2,000 small-capitalization stocks.
 
                      Two Portfolios are designed for investors seeking to
                      emphasize certain investment characteristics while
                      continuing to utilize a "passive" investment approach:
 
                      - THE VALUE PORTFOLIO is designed for investors seeking to
                        replicate the total return of the S&P/BARRA Value Index,
                        an index consisting of companies of the S&P 500 Index
                        with lower than average market price to book value
                        ratios. Such a "value-oriented" Portfolio may be
                        appropriate for more conservative stock market investors
                        who are seeking higher dividend income and somewhat
                        below average stock market volatility.
 
                      - THE GROWTH PORTFOLIO is designed for investors seeking
                        to replicate the total return of the S&P/BARRA Growth
                        Index, an index consisting of companies of the S&P 500
                        Index with higher than average market price to book
                        value ratios. Such a "growth-oriented" Portfolio may be
                        appropriate for investors who have little need
 
                                       15
<PAGE>   58
 
                       for current dividend income and who can tolerate somewhat
                       above average stock market volatility.
 
                      Taken together in appropriate proportions, the Value and
                      Growth Portfolios are expected to approximate the total
                      returns achieved by the 500 Portfolio.
 
                      The share price of each Portfolio is expected to be
                      volatile, and investors should be able to tolerate sudden,
                      sometimes substantial fluctuations in the value of their
                      investment. No assurance can be given that the Portfolios
                      will achieve their stated objectives or that shareholders
                      will be protected from the risks inherent in equity
                      investing. Investors may wish to purchase shares on a
                      regular, periodic basis (dollar-cost averaging) rather
                      than investing in one lump sum in order to reduce the risk
                      of investing all their monies in common stocks at a
                      particularly unfavorable time.
 
                      The Trust is intended to be a long-term investment vehicle
                      and is not designed to provide investors with a means of
                      speculating on short-term market movements. Investors who
                      engage in excessive account activity generate additional
                      costs which are borne by all of the Trust's shareholders.
                      In order to minimize such costs the Trust has adopted the
                      following policies. The Trust reserves the right to reject
                      any purchase request (including exchange purchases from
                      other Vanguard portfolios) that is reasonably deemed to be
                      disruptive to efficient portfolio management, either
                      because of the timing of the investment or previous
                      excessive trading by the investor. Finally, the Trust
                      reserves the right to suspend the offering of its shares.
 
                      Investors should not consider the Trust a complete
                      investment program, but should maintain holdings of
                      securities with different risk
                      characteristics -- including common stocks, bonds and
                      money market instruments. Investors may also wish to
                      complement an investment in the Trust with other types of
                      common stock investments.
--------------------------------------------------------------------------------
 
IMPLEMENTATION
OF POLICIES
THE 500 PORTFOLIO
INVESTS IN ALL 500
S&P STOCKS
                      Each Portfolio of the Trust utilizes a number of
                      investment practices in an effort to match the investment
                      performance of its respective index.
 
                      The 500 Portfolio attempts to duplicate the investment
                      results of the S&P 500 Index by holding all 500 stocks in
                      approximately the same proportions as they are represented
                      in the Index. This indexing technique is known as
                      "complete replication."
 
                      The S&P 500 Index is composed of 500 common stocks, which
                      are chosen by Standard & Poor's Corporation on a
                      statistical basis to be included in the Index. The
                      inclusion of a stock in the S&P 500 Index in no way
                      implies that Standard & Poor's Corporation believes the
                      stock to be an attractive investment. The 500 securities,
                      most of which trade on the New York Stock Exchange,
                      represented, as of December 31, 1994, approximately 69% of
                      the market value of all U.S. common stocks. Each stock in
                      the S&P 500 Index is weighted by its market value.
 
                      Because of the market-value weighting, the 50 largest
                      companies in the S&P 500 Index currently account for
                      approximately 46% of the Index. Typically, companies
                      included in the S&P 500 Index are the largest and most
                      dominant firms in their respective industries. As of
                      December 31, 1994, the five largest companies in the Index
                      were: General Electric (2.6%), American Telephone and
                      Telegraph (2.4%),
 
                                       16
<PAGE>   59
 
                      Exxon Corporation (2.3%), Coca Cola (2.0%), and Royal
                      Dutch Petroleum (1.7%). The largest industry categories
                      were: telephone companies (8.5%), international oil
                      companies (6.3%), pharmaceutical companies (5.3%), banks
                      (5.3%), and electric power (4.0%).
 
THE EXTENDED MARKET
PORTFOLIO INVESTS IN
MEDIUM- AND SMALL-
SIZE COMPANY STOCKS   While the S&P 500 Index includes the preponderance of
                      large market capitalization stocks, it excludes most of
                      the medium- and small-size companies which comprise the
                      remaining 31% of the capitalization of the U.S. stock
                      market. The Wilshire 4500 Index consists of all U.S.
                      stocks that are not in the S&P 500 Index and that trade
                      regularly on the New York and American Stock Exchanges as
                      well as in the NASDAQ over-the-counter market. More than
                      5,000 stocks of medium- and small-capitalization companies
                      are included in the Wilshire 4500 Index.
 
                      The Extended Market Portfolio will be unable to hold all
                      of the more than 5,000 issues which comprise the Wilshire
                      4500 Index because of the costs involved and the
                      illiquidity of many of the securities. Instead, the
                      Portfolio will hold a representative sample of the
                      securities in the Wilshire 4500 Index.
 
THE TOTAL STOCK
MARKET PORTFOLIO
INVESTS IN A SAMPLE
OF ALL U.S. STOCKS
                      Neither the S&P 500 Index nor the Wilshire 4500 Index
                      independently represents the U.S. stock market as a whole.
                      The Wilshire 5000 Index, which consists of all regularly
                      and publicly traded U.S. stocks, provides a complete proxy
                      for the U.S. stock market. More than 6,000 stocks,
                      including large-, medium-, and small-capitalization
                      companies are included in the Wilshire 5000 Index.
 
                      The following table illustrates the changing proportions
                      that the S&P 500 Index and the Wilshire 4500 Index have
                      represented in the Wilshire 5000 Index since 1985.
 
<TABLE>
<CAPTION>
                              WILSHIRE 5000 INDEX    1985    1986    1987    1988    1989    1990    1991    1992    1993    1994
                              ------------------     ----    ----    ----    ----    ----    ----    ----    ----    ----    ----
                              <S>                     <C>     <C>     <C>     <C>     <C>     <C>     <C>     <C>     <C>     <C>
                              S&P 500.............    69%     70%     71%     71%     73%     72%     75%     71%     67%     69%
                              Wilshire 4500.......    31%     30%     29%     29%     27%     28%     25%     29%     33%     31%
                                                     ---     ---     ---     ---     ---     ---     ---     ---     ---     ---
                                                     100%    100%    100%    100%    100%    100%    100%    100%    100%    100%
</TABLE>
 
                      In an effort to replicate the investment performance of
                      the Wilshire 5000 Index, the Total Stock Market Portfolio
                      will invest in approximately 1,000 of the largest stocks
                      in the index and an additional representative sample of
                      the remaining stocks. As in the case for the Extended
                      Market Portfolio, the high transaction costs and
                      illiquidity of many of the smaller stocks make complete
                      replication of the Wilshire 4500 Index's holdings
                      impractical.
 
                      The Extended Market and Total Stock Market Portfolios are
                      not sponsored, endorsed, sold or promoted by Wilshire
                      Associates. Wilshire(R) and Wilshire 5000(R) are
                      registered service marks of Wilshire Associates.
 
THE SMALL
CAPITALIZATION STOCK
PORTFOLIO INVESTS IN
SMALL-SIZE COMPANY
STOCKS
                      The Small Capitalization Stock Portfolio attempts to
                      duplicate the investment results of the Russell 2000 Index
                      by investing in approximately 1,000 of the 2,000 stocks in
                      the Russell 2000 Index. The Russell 2000 Index is composed
                      of approximately 2,000 small-capitalization common stocks.
                      A company's stock market capitalization is the total
                      market value of its floating outstanding shares. As of
                      December 31, 1994, the average stock market capitalization
                      of the Russell 2000
 
                                       17
<PAGE>   60
 
                      was $211 million. As in the case of the Extended Market
                      Portfolio, the high transaction costs and illiquidity of
                      many of the small stocks contained in the Russell 2000
                      Index make complete replication of the holdings
                      impractical.
 
                      The Portfolio is neither sponsored by nor affiliated with
                      the Frank Russell Company. Frank Russell's only
                      relationship to the Portfolio is the licensing of the use
                      of the Russell 2000 Small Stock Index. Frank Russell
                      Company is the owner of the trademarks and copyrights
                      relating to the Russell indexes.
 
THE EXTENDED MARKET,
TOTAL STOCK MARKET AND
SMALL CAPITALIZATION
STOCK PORTFOLIOS USE
SAMPLING TECHNIQUES   The stocks of the Wilshire 4500 Index to be included in
                      the Extended Market Portfolio will be selected utilizing a
                      statistical sampling technique known as "optimization."
                      This process selects stocks for the Portfolio so that
                      various industry weightings, market capitalizations, and
                      fundamental characteristics (e.g. price-to-book,
                      price-to-earnings, debt to asset ratios, and dividend
                      yields) closely approximate those of the appropriate
                      Index. For instance, if 10% of the capitalization of the
                      Wilshire 4500 Index consists of utility companies with
                      relatively large stock capitalizations, then the Extended
                      Market Portfolio is constructed so that approximately 10%
                      of the Portfolio's assets are invested in the stocks of
                      utility companies with relatively large capitalizations.
                      The Total Stock Market and Small Capitalization Stock
                      Portfolios are constructed using a sampling technique
                      known as optimization.
 
                      This sampling technique is expected to be an effective
                      means of substantially duplicating the income and capital
                      returns of the Extended Market, Total Stock Market and
                      Small Capitalization Stock Portfolios' target benchmarks.
                      Over time, the correlation between the performance of the
                      Extended Market, Total Stock Market and Small
                      Capitalization Stock Portfolios and their respective
                      indexes, the Wilshire 4500 Index, Wilshire 5000 Index and
                      Russell 2000 Index is expected to be at least 0.95. A
                      correlation of 1.00 would indicate perfect correlation,
                      which would be achieved when the net asset value of a
                      Portfolio, including the value of its dividend and capital
                      gains distributions, increases or decreases in exact
                      proportion to changes in the respective target benchmark.
 
                      Due to the use of the sampling technique, neither the
                      Extended Market Portfolio, Total Stock Market Portfolio
                      nor the Small Capitalization Stock Portfolio is expected
                      to track its benchmark index with the same degree of
                      accuracy as evidenced by the high degree of correlation
                      between the 500 Portfolio and its benchmark. However, the
                      principal advantage of this technique is to provide an
                      efficient means to invest in the universe of stocks. In
                      particular, the three Portfolios are expected to provide
                      broad diversification, and should operate at low costs due
                      both to their "passive" approach to portfolio management
                      and low portfolio turnover rate.
 
THE VALUE AND GROWTH
PORTFOLIOS EMPHASIZE
STOCKS WITH CERTAIN
INVESTMENT
CHARACTERISTICS
                      In an effort to duplicate the investment results of their
                      respective indexes, the Value and Growth Portfolios will
                      utilize "complete replication," the same indexing
                      technique used for the 500 Portfolio. Specifically, the
                      Value and Growth Portfolios will hold all of the stocks
                      included in the S&P/BARRA Value and Growth Indexes,
                      respectively, in approximately the same proportions as
                      those stocks are represented in the Indexes.
 
                                       18
<PAGE>   61
 
                      Standard & Poor's Corporation constructs the S&P/BARRA
                      Value and Growth Indexes semi-annually by ranking all
                      common stocks included in the S&P 500 Index by their
                      price-to-book ratios. The resulting list is then divided
                      in half by market capitalization. Those companies
                      representing half of the market capitalization of the S&P
                      500 Index and having lower price-to-book ratios are
                      included in the S&P/BARRA Value Index; the remaining
                      companies are incorporated in the S&P/ BARRA Growth Index.
                      On December 31, 1994, after the semi-annual reconstitution
                      of the indexes, the S&P/BARRA Value Index consisted of 318
                      common stocks in the S&P 500 Index, while the S&P/BARRA
                      Growth Index consisted of the remaining 182. Each Index
                      represented half of the market capitalization of the S&P
                      500 Index.
 
                      Investment managers may use a number of different methods
                      to classify stocks as "value" or "growth". There may also
                      be other ways to define benchmarks for "value" and
                      "growth" investing. If other methods were applied to the
                      companies comprising the S&P/BARRA Value and Growth
                      Indexes, the classification of the stocks as "growth" or
                      "value" might be different.
 
                      Typically, the stocks included in the S&P/BARRA Value
                      Index exhibit above-average dividend yields and lower
                      price-to-book ratios. By comparison, the stocks included
                      in the S&P/BARRA Growth Index exhibit below-average
                      dividend yields and higher price-to-book ratios. As of
                      December 31, 1994, the five largest companies in the
                      S&P/BARRA Value Index were Exxon Corp., Royal Dutch
                      Petroleum Co., IBM, DuPont E.I. de Nemours, and Mobil; the
                      five largest companies in the S&P/BARRA Growth Index were
                      General Electric Co., American Telephone & Telegraph, Coca
                      Cola Co., Phillip Morris Cos., Inc., and Wal-Mart Stores.
 
                      "Standard & Poor's(R)", "S&P(R)", "S&P 500(R)", "Standard
                      & Poor's 500(R)", and "500" are trademarks of McGraw-Hill,
                      Inc. and have been licensed for use by Vanguard. The 500,
                      Value and Growth Portfolios are not sponsored, endorsed,
                      sold or promoted by Standard & Poor's Corporation ("S&P").
                      S&P makes no representations or warranty, implied or
                      expressed, to the purchasers of the Portfolios or any
                      member of the public regarding the advisability of
                      investing in index funds or the ability of the S&P 500,
                      S&P/BARRA Value and S&P/BARRA Growth Indexes to track
                      general stock market performance or to track the general
                      performance of value and growth stocks. S&P does not
                      guarantee the accuracy and/or the completeness of the S&P
                      500, S&P/BARRA Value and S&P/BARRA Growth Indexes or any
                      data included herein.
 
                      S&P's only relationship to the Portfolios is the licensing
                      of the S&P marks and the S&P 500, S&P/BARRA Value and
                      S&P/BARRA Growth Indexes, which are determined, composed
                      and calculated by S&P without regard to the 500, Value and
                      Growth Portfolios.
 
EACH PORTFOLIO MAY
INVEST IN SHORT-TERM
FIXED INCOME
SECURITIES
                      Although all six Portfolios normally seek to remain
                      substantially fully invested in common stocks, the
                      Portfolios of the Trust may invest temporarily in certain
                      short-term fixed income securities. Such securities may be
                      used to invest uncommitted cash balances or to maintain
                      liquidity to meet shareholder redemptions. These
                      securities include: obligations of the United States
                      Government and its agencies or
 
                                       19
<PAGE>   62
 
                      instrumentalities; commercial paper, bank certificates of
                      deposit, and bankers' acceptances; and repurchase
                      agreements collateralized by these securities.
 
EACH PORTFOLIO MAY
USE FUTURES CONTRACTS,
OPTIONS AND WARRANTS,
CONVERTIBLE SECURITIES
AND SWAP AGREEMENTS   Each Portfolio of the Trust may utilize stock futures
                      contracts, options, warrants, convertible securities and
                      swap agreements to a limited extent. Specifically, each
                      Portfolio may enter into futures contracts and options
                      provided that not more than 5% of its assets are required
                      as a margin deposit for futures contracts or options and
                      provided that not more than 20% of a Portfolio's assets
                      are invested in futures and options at any time.
                      Additionally, the Trust's investment in warrants will not
                      exceed more than 5% of its assets (2% with respect to
                      warrants not listed on the New York or American Stock
                      Exchanges). Futures contracts, options, warrants,
                      convertible securities and swap agreements may be used for
                      several reasons: to simulate full investment in the
                      underlying index while retaining a cash balance for fund
                      management purposes, to facilitate trading, to reduce
                      transaction costs or to seek higher investment returns
                      when a futures contract, option, warrant, convertible
                      security or swap agreement is priced more attractively
                      than the underlying equity security or index. While each
                      of these securities can be used as leveraged investments,
                      the Portfolios may not use them to leverage its net
                      assets.
 
FUTURES CONTRACTS,
OPTIONS, WARRANTS,
CONVERTIBLE SECURITIES
AND SWAP AGREEMENTS
POSE CERTAIN RISKS
                      The risk of loss associated with futures contracts in some
                      strategies can be substantial due both to the low margin
                      deposits required and the extremely high degree of
                      leverage involved in futures pricing. As a result, a
                      relatively small price movement in a futures contract may
                      result in an immediate and substantial loss or gain.
                      However, the Portfolios will not use futures contracts,
                      options, warrants, convertible securities and swap
                      agreements for speculative purposes or to leverage their
                      net assets. Accordingly, the primary risks associated with
                      the use of futures contracts, options, warrants,
                      convertible securities and swap agreements by the
                      Portfolios are: (i) imperfect correlation between the
                      change in market value of the stocks held by a Portfolio
                      and the prices of futures contracts, options, warrants,
                      convertible securities and swap agreements; and (ii)
                      possible lack of a liquid secondary market for a futures
                      contract and the resulting inability to close a futures
                      position prior to its maturity date. The risk of imperfect
                      correlation will be minimized by investing only in those
                      contracts whose behavior is expected to resemble that of a
                      Portfolio's underlying securities. The risk that a
                      Portfolio will be unable to close out a futures position
                      will be minimized by entering into such transactions on an
                      exchange with an active and liquid secondary market.
                      However options, warrants, convertible securities and swap
                      agreements purchased or sold over-the-counter may be less
                      liquid than exchange-traded securities. Illiquid
                      securities, in general, may not represent more than 15% of
                      the net assets of a Portfolio of the Trust.
 
                      Since there are no futures traded on the S&P/BARRA Value
                      or Growth Indexes, it will be necessary for the Value and
                      Growth Portfolios to utilize a composite of other futures
                      contracts to simulate the performance of each of these
                      Indexes. This process may magnify the "tracking error" of
                      each Portfolio's performance compared to that of the
                      Indexes, due to lower correlation of the selected futures
                      with the Indexes. The investment adviser will attempt to
                      reduce this tracking error by investing in futures
 
                                       20
<PAGE>   63
 
                      contracts whose behavior is expected to resemble that of
                      the underlying securities, although there can be no
                      assurance that these selected futures will perfectly
                      correlate with the performance of the Indexes.
 
                      Swap agreements are contracts between parties in which one
                      party agrees to make payments to the other party based on
                      the change in market value of a specified index or asset.
                      In return, the other party agrees to make payments to the
                      first party based on the return of a different specified
                      index or asset. Although swap agreements entail the risk
                      that a party will default on its payment obligations
                      thereunder, the Portfolios will minimize this risk by
                      entering into agreements that mark to market no less
                      frequently than quarterly. Swap agreements also bear the
                      risk that the Portfolios will not be able to meet its
                      obligation to the counterparty. This risk will be
                      mitigated by investing the Portfolios in the specific
                      asset for which it is obligated to pay a return.
 
EACH PORTFOLIO MAY
LEND ITS SECURITIES   Each Portfolio of the Trust may lend its investment
                      securities to qualified institutional investors for either
                      short-term or long-term purposes of realizing additional
                      income. Loans of securities by a Portfolio will be
                      collateralized by cash, letters of credit, or securities
                      issued or guaranteed by the U.S. Government or its
                      agencies. The collateral will equal at least 100% of the
                      current market value of the loaned securities, and such
                      loans may not exceed 33 1/3% of the value of the
                      Portfolio's securities.
 
PORTFOLIO TURNOVER IS
EXPECTED TO BE LOW    Although each Portfolio generally seeks to invest for the
                      long term, the six Portfolios of the Trust retain the
                      right to sell securities irrespective of how long they
                      have been held. However, because of the "passive"
                      investment management approach of the Trust, the portfolio
                      turnover rate for each Portfolio is expected to be under
                      50%, a generally lower turnover rate than for most other
                      investment companies. A portfolio turnover rate of 50%
                      would occur if one half of a Portfolio's securities were
                      sold within one year. Ordinarily, securities will be sold
                      from a Portfolio only to reflect certain administrative
                      changes in an index (including mergers or changes in the
                      composition of an index) or to accommodate cash flows into
                      and out of each Portfolio while maintaining the similarity
                      of a Portfolio to its benchmark index.
--------------------------------------------------------------------------------
 
INVESTMENT
LIMITATIONS
THE TRUST HAS ADOPTED
CERTAIN FUNDAMENTAL
LIMITATIONS           The Trust has adopted certain limitations on its
                      investment practices. Specifically, each Portfolio of the
                      Trust will not:
 
                      (a) with respect to 75% of its assets, purchase securities
                          of any issuer (except obligations of the U.S.
                          Government and its instrumentalities) if, as a result,
                          more than 5% of the value of the Portfolio's assets
                          would be invested in the securities of such issuer;
                      (b) with respect to 75% of its assets, purchase more than
                          10% of the voting securities of any issuer;
                      (c) invest more than 25% of its assets in any one
                          industry; and
                      (d) borrow money, except that a Portfolio may borrow from
                          banks (or through reverse repurchase agreements), for
                          temporary or emergency (not leveraging) purposes,
                          including the meeting of redemption requests which
                          might otherwise require the untimely disposition of
                          securities, in an amount not exceeding 15%
 
                                       21
<PAGE>   64
 
                        of the value of the Portfolio's net assets (including
                        the amount borrowed and the value of any outstanding
                        reverse repurchase agreements) at the time the borrowing
                        is made. Whenever borrowings exceed 5% of the value of a
                        Portfolio's net assets, the Portfolio will not make any
                        additional investments.
 
                      These investment limitations are considered at the time
                      investment securities are purchased. The limitations
                      described here and in the Statement of Additional
                      Information may be changed only with the approval of a
                      majority of a Portfolio's shareholders.
--------------------------------------------------------------------------------
 
MANAGEMENT
OF THE TRUST
VANGUARD ADMINISTERS
AND DISTRIBUTES THE
TRUST                 The Trust is a member of The Vanguard Group of Investment
                      Companies, a family of more than 30 investment companies
                      with more than 80 distinct portfolios and total assets in
                      excess of $130 billion. Through their jointly-owned
                      subsidiary, The Vanguard Group, Inc. ("Vanguard"), the
                      Trust and the other funds in the Group obtain at cost
                      virtually all of their corporate management,
                      administrative and distribution services. Vanguard also
                      provides investment advisory services on an at-cost basis
                      to certain Vanguard funds. As a result of Vanguard's
                      unique corporate structure, the Vanguard funds have costs
                      substantially lower than those of most competing mutual
                      funds. In 1994, the average expense ratio (annual costs
                      including advisory fees divided by total net assets) for
                      the Vanguard funds amounted to approximately .30% compared
                      to an average of 1.05% for the mutual fund industry (data
                      provided by Lipper Analytical Services).
 
                      The Officers of the Trust manage its day-to-day operations
                      and are responsible to the Trust's Board of Trustees. The
                      Trustees set broad policies for the Trust and choose its
                      Officers. A list of the Trustees and Officers of the Trust
                      and a statement of their present positions and principal
                      occupations during the past five years can be found in the
                      Statement of Additional Information.
 
                      Vanguard employs a supporting staff of management and
                      administrative personnel needed to provide the requisite
                      services to the funds and also furnishes the funds with
                      necessary office space, furnishings and equipment. Each
                      fund pays its share of Vanguard's total expenses, which
                      are allocated among the funds under methods approved by
                      the Board of Trustees (Directors) of each fund. In
                      addition, each fund bears its own direct expenses, such as
                      legal, auditing and custodian fees.
 
                      Vanguard provides distribution and marketing services to
                      the funds. The funds are available on a no-load basis
                      (i.e., there are no sales commissions or 12b-1 fees).
                      However, each fund bears its share of the Group's
                      distribution costs.
--------------------------------------------------------------------------------
 
INVESTMENT
ADVISER
VANGUARD MANAGES
THE TRUST ON AN
AT-COST BASIS         The six Portfolios of the Trust receive all investment
                      advisory services on an at-cost basis from Vanguard's Core
                      Management Group. The Core Management Group also provides
                      investment advisory services to several other Vanguard
                      Funds, including Vanguard International Equity Index Fund,
                      Vanguard Institutional Index Fund, Vanguard Balanced Index
                      Fund, Vanguard Variable Insurance Fund -- Equity Index
                      Portfolio, a portion of Vanguard/Morgan Growth Fund, and a
                      portion of Vanguard/ Windsor II, as well as to several
                      indexed separate accounts. Total assets under
 
                                       22
<PAGE>   65
 
                      management by the Core Management Group were $18 billion
                      as of December 31, 1994. The Trust is not actively
                      managed, but is instead administered by the Core
                      Management Group using computerized, quantitative
                      techniques. The Core Management Group is supervised by the
                      Officers of the Trust.
 
                      In placing portfolio transactions, the Core Management
                      Group uses its best judgment to choose the broker most
                      capable of providing the brokerage services necessary to
                      obtain the best available price and most favorable
                      execution at the lowest commission rate. The full range
                      and quality of brokerage services available are considered
                      in making these determinations. In those instances where
                      it is reasonably determined that more than one broker can
                      offer the services needed to obtain the best available
                      price and most favorable execution, consideration may be
                      given to those brokers which supply statistical
                      information and provide other services in addition to
                      execution services to the Trust.
--------------------------------------------------------------------------------
 
PERFORMANCE
RECORD                The tables in this section provide investment results for
                      the 500, Extended Market and Small Capitalization Stock
                      Portfolios of the Trust for several periods throughout the
                      Trust's lifetime. The results shown represent "total
                      return" investment performance, which assumes the
                      reinvestment of all capital gains and income dividends for
                      the indicated periods. Also included is comparative
                      information with respect to the unmanaged S&P 500
                      Composite Stock Price Index, the Wilshire 4500 Index and
                      the Russell 2000 Index. The results for the Portfolios are
                      net of all expenses while the results of the stock indexes
                      are hypothetical and make no allowances for the costs of
                      investing. The tables do not make any allowance for
                      federal, state or local income taxes, which shareholders
                      must pay on a current basis.
 
                      The results shown should not be considered a
                      representation of the total return from an investment made
                      in the Trust today. The periods shown were generally
                      favorable ones for stock market investing. This
                      information is provided to help investors better
                      understand the Trust and may not provide a basis for
                      comparison with other investments or mutual funds which
                      use a different method to calculate performance.
 
<TABLE>
<CAPTION>
                                                      AVERAGE ANNUAL TOTAL
                                                           RETURN FOR
                                                         VANGUARD INDEX
                                                     TRUST -- 500 PORTFOLIO
                                                   --------------------------
                               FISCAL PERIODS          500           S&P 500
                               ENDED 12/31/94       PORTFOLIO*        INDEX
                             ------------------    ------------     ---------
                             <S>                   <C>              <C>
                             1 Year                    + 1.1%         + 1.3%
                             5 Years                   + 8.5          + 8.7
                             10 Years                  +14.0          +14.3
                             Lifetime**                +12.5          +13.0
</TABLE>
 
                             * Exclusive of $10 annual account maintenance fee.
                            ** August 31, 1976 to December 31, 1994.
 
                                       23
<PAGE>   66
 
<TABLE>
<CAPTION>
                                                   AVERAGE ANNUAL TOTAL RETURN
                                                               FOR
                                                     VANGUARD INDEX TRUST --
                                                    EXTENDED MARKET PORTFOLIO
                                                   ---------------------------
                                                     EXTENDED        WILSHIRE
                               FISCAL PERIODS         MARKET           4500
                               ENDED 12/31/94       PORTFOLIO*        INDEX
                             ------------------    ------------     ----------
                             <S>                   <C>              <C>
                             1 Year                    - 2.8%          - 2.7%
                             5 Years                   + 8.8           + 9.1
                             Lifetime**                +12.3           +12.7
</TABLE>
 
                             * Includes 1% portfolio transaction fee but
                               exclusive of $10 annual account maintenance fee.
                            ** December 21, 1987 to December 31, 1994.
 
<TABLE>
<CAPTION>
                                                          AVERAGE ANNUAL TOTAL RETURN FOR
                                                              VANGUARD INDEX TRUST --
                                                             SMALL CAPITALIZATION STOCK
                                                                     PORTFOLIO+
                                                          --------------------------------
                                                                SMALL             RUSSELL
                                  FISCAL PERIODS            CAPITALIZATION         2000
                                  ENDED 12/31/94           STOCK PORTFOLIO*        INDEX
                             -------------------------    ------------------     ---------
                             <S>                          <C>                    <C>
                             1 Year                              - 1.6%            - 1.8%
                             3 Years                             +11.3             +11.4
                             5 Years                             +10.4             +10.2
                             Since September 11, 1989            + 8.2               N/A
</TABLE>
 
                            * Includes 1% portfolio transaction fee but
                              exclusive of $10 annual account maintenance fee.
                            + Formerly Vanguard Small Capitalization Stock Fund,
                              Inc.
--------------------------------------------------------------------------------
 
DIVIDENDS,
CAPITAL GAINS
AND TAXES
FOUR PORTFOLIOS PAY
QUARTERLY DIVIDENDS;
TWO PORTFOLIOS PAY
DIVIDENDS ONCE A YEAR The Trust distributes substantially all of its net
                      investment income in the form of dividends. The 500, Total
                      Stock Market, Value and Growth Portfolios pay quarterly
                      dividends, while the Extended Market and Small
                      Capitalization Stock Portfolios pay annual dividends. For
                      all six Portfolios, net capital gains, if any, are
                      distributed annually. A Portfolio's dividend and capital
                      gains distributions are automatically reinvested in
                      additional shares. Each Portfolio of the Trust intends to
                      continue to qualify for taxation as a "regulated
                      investment company" under the Internal Revenue Code so
                      that each Portfolio will not be subject to federal income
                      tax to the extent its income is distributed to
                      shareholders.
 
                      If you utilize a Portfolio of the Trust as an investment
                      option in an employer-sponsored retirement savings plan,
                      dividend and capital gains distributions from the
                      Portfolio ordinarily will not be subject to current
                      taxation, but will accumulate on a tax-deferred basis. In
                      general, employer-sponsored retirement and savings plans
                      are governed by complex tax rules. If you participate in
                      such a plan, consult your plan administrator, your plan's
                      Summary Plan Description, or a professional tax adviser
                      regarding the tax consequences of your participation in
                      the plan and of any plan contributions or withdrawals.
--------------------------------------------------------------------------------
 
                                       24
<PAGE>   67
 
THE SHARE
PRICE OF
EACH PORTFOLIO        The share price or "net asset value" per share of each
                      Portfolio is determined by dividing the total market value
                      of the Portfolio's investments and other assets, less any
                      liabilities, by the number of outstanding shares of the
                      Portfolio. Net asset value per share is determined once
                      daily at the close of regular trading on the New York
                      Stock Exchange (generally 4:00 p.m. Eastern time).
 
                      Portfolio securities that are listed on a securities
                      exchange are valued at the last quoted sales price on the
                      day the valuation is made. Price information on listed
                      securities is taken from the exchange where the security
                      is primarily traded. Securities which are listed on an
                      exchange and which are not traded on the valuation date
                      are valued at the mean of the bid and ask prices. For the
                      500, Value and Growth Portfolios, unlisted securities for
                      which market quotations are readily available are valued
                      at the latest quoted bid price. For the Extended Market,
                      Total Stock Market and Small Capitalization Stock
                      Portfolios, unlisted securities for which market
                      quotations are readily available are valued at the mean of
                      the bid and ask prices. Temporary cash investments are
                      valued at amortized cost which approximates market value.
                      Securities for which no current quotations are readily
                      available are valued at fair market value as determined in
                      good faith by the Trustees. Securities may be valued on
                      the basis of prices provided by a pricing service when
                      such prices are believed to reflect the fair market value
                      of such securities.
 
                      Each Portfolio's share price can be found daily in the
                      mutual fund listings of most major newspapers under the
                      heading of The Vanguard Group.
--------------------------------------------------------------------------------
 
GENERAL
INFORMATION           The Trust is a Pennsylvania business trust. The
                      Declaration of Trust permits the Trustees to issue an
                      unlimited number of shares of beneficial interest with no
                      par value. The Board of Trustees has the power to
                      designate one or more classes or series of shares of
                      common stock and to classify or reclassify any unissued
                      shares with respect to such series. Currently, the Trust
                      is offering shares of six series.
 
                      The shares of each series are fully paid and
                      non-assessable; have no preference as to conversion,
                      exchange, dividends, retirement or other features; and
                      have no pre-emptive rights. Such shares have
                      non-cumulative voting rights, meaning that the holders of
                      more than 50% of the shares voting for the election of
                      Trustees can elect 100% of the Trustees if they so choose.
 
                      Annual meetings of shareholders will not be held except as
                      required by the Investment Company Act of 1940 and other
                      applicable law. An annual meeting will be held to vote on
                      the removal of a Trustee or Trustees of the Trust if
                      requested in writing by the holders of not less than 10%
                      of the outstanding shares of the Trust.
 
                      All securities and cash for the 500, Extended Market, and
                      Total Stock Market Portfolios are held by State Street
                      Bank and Trust Company, Boston, MA. All securities and
                      cash for the Small Capitalization Stock, Value and Growth
                      Portfolios are held by CoreStates Bank, Philadelphia, PA.
                      The Vanguard Group, Inc., Valley Forge, PA, serves as the
                      Trust's Transfer and Dividend Disbursing Agent. Price
                      Waterhouse LLP serves as independent accountants for the
                      Trust and will audit its financial statements annually.
                      The Trust is not involved in any litigation.
--------------------------------------------------------------------------------
 
                                       25
<PAGE>   68
 
                                 SERVICE GUIDE
 
PARTICIPATING IN
YOUR PLAN             One or more Portfolios of the Trust are available as
                      investment options in your retirement or savings plan. The
                      administrator of your plan or your employee benefits
                      office can provide you with detailed information on how to
                      participate in your plan and how to elect a Portfolio of
                      the Trust as an investment option.
 
                      If you have any questions about a Portfolio, including the
                      Portfolio's investment objective, policies, risk
                      characteristics or historical performance, please contact
                      Participant Services at 1-800-523-1188.
 
                      If you have questions about your account, contact your
                      plan administrator or the organization which provides
                      recordkeeping services for your plan.
--------------------------------------------------------------------------------
 
INVESTMENT OPTIONS
AND ALLOCATIONS       You may be permitted to elect different investment
                      options, alter the amounts contributed to your plan, or
                      change how contributions are allocated among your
                      investment options in accordance with your plan's specific
                      provisions. See your plan administrator or employee
                      benefits office for more details.
--------------------------------------------------------------------------------
 
TRANSACTIONS IN
FUND SHARES           Contributions, exchanges or redemptions of a Portfolio's
                      shares are effective when received in "good order" by
                      Vanguard. "Good order" means that complete information on
                      the contribution, exchange or redemption and the
                      appropriate monies have been received by Vanguard.
--------------------------------------------------------------------------------
 
MAKING EXCHANGES      Your plan may allow you to exchange monies from one
                      investment option to another. Check with your plan
                      administrator for details on the rules governing exchanges
                      in your plan. Certain investment options, particularly
                      company stock or investment contracts, may be subject to
                      unique restrictions.
 
                      Before making an exchange, you should consider the
                      following:
 
                      - If you are making an exchange to another Vanguard Fund
                        option, please read the Fund's prospectus. Contact
                        Participant Services at 1-800-523-1188 for a copy.
 
                      - Exchanges are accepted by Vanguard only as permitted by
                        your plan. Your plan administrator can explain how
                        frequently exchanges are allowed.
--------------------------------------------------------------------------------
 
                                       26
<PAGE>   69
 
                     [THIS PAGE INTENTIONALLY LEFT BLANK.]
<PAGE>   70
 
   
--------------------------------------------------------------------------------
    
 
   
<TABLE>
<S>     <C>                                                        <C>                              
        [VANGUARD INDEX TRUST LOGO]                                                             [LOGO]
        ---------------------------                                                  [VANGUARD INDEX TRUST LOGO]            
        THE VANGUARD GROUP                                                      I  N  S  T  I  T  U  T  I  O  N  A  L
          OF INVESTMENT                                                             P  R  O  S  P  E  C  T  U  S
          COMPANIES                                                          APRIL 28, 1995; REVISED SEPTEMBER 15, 1995
        Vanguard Financial Center                                                               
        P.O. Box 2900
        Valley Forge, PA 19482

        INSTITUTIONAL PARTICIPANT
          SERVICES DEPARTMENT:
        1-800-523-1188

        TRANSFER AGENT:
        The Vanguard Group, Inc.
        Vanguard Financial Center
        Valley Forge, PA 19482


I040                                                                                 [THE VANGUARD GROUP LOGO]
</TABLE>
    
 
--------------------------------------------------------------------------------


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