VANGUARD CONVERTIBLE SECURITIES FUND INC
497, 1997-03-14
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                                                A Member of The Vanguard Group 
================================================================================
PROSPECTUS -- March 7, 1997 
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NEW ACCOUNT INFORMATION: Investor Information Department - 1-800-662-7447 (SHIP)
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SHAREHOLDER ACCOUNT SERVICES: Client Services Department - 1-800-662-2739 (CREW)
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INVESTMENT     Vanguard Convertible Securities Fund, Inc. (the "Fund") is an   
OBJECTIVE AND  open-end diversified investment company that seeks to provide    
POLICIES       current income and long-term growth of capital. The Fund invests 
               primarily in corporate bonds and preferred stocks that are       
               convertible into shares of common stock. Although the Fund is    
               designed principally for equity-oriented investors, you should be
               aware that a majority of the Fund's assets may be invested in    
               convertible securities rated Ba or B by Moody's Investors Service
               or BB or B by Standard & Poor's Corporation. Corporate bonds with
               such ratings are commonly referred to as "junk bonds" and are   
               considered speculative by the major ratings agencies. There is no
               assurance that the Fund will achieve its stated objectives.      
               Shares of the Fund are neither insured nor guaranteed by any     
               agency of the U.S. Government, including the FDIC.               
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OPENING AN     To open a regular (non-retirement) account, please complete and  
ACCOUNT        return the Account Registration Form. If you need assistance in  
               completing this Form, please call the 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 9:00 p.m. and Saturday from 9:00 a.m. to 4:00 p.m.       
               (Eastern time). The minimum initial investment is $3,000, or     
               $1,000 for Uniform Gifts/Transfers to Minors Act accounts. The   
               Fund is offered on a no-load basis (i.e., there are no sales     
               commissions or 12b-1 fees). However, the Fund incurs expenses for
               investment advisory, management, administrative and distribution 
               services.                                                        
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ABOUT THIS     This Prospectus is designed to set forth concisely the          
PROSPECTUS     information you should know about the Fund before you invest. It
               should be retained for future reference. A "Statement of        
               Additional Information" containing additional information about 
               the Fund has been filed with the Securities and Exchange        
               Commission. This Statement is dated March 7, 1997, and has been 
               incorporated by reference into this Prospectus. It may be       
               obtained, without charge, by writing to the Fund or by calling  
               the Investor Information Department.                      
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TABLE OF CONTENTS 
<TABLE>
<CAPTION>
<S>                            <C>     <C>                            <C>      <C>                          <C>
                             Page                                   Page                                    Page  
Fund Expenses  ............     2      Investment Limitations  ...     9            SHAREHOLDER GUIDE            
Financial Highlights  .....     2      Management of the Fund  ...    10       Opening an Account and            
Yield and Total Return  ...     3      Investment Adviser  .......    10         Purchasing Shares  ......    16 
     FUND INFORMATION                  Performance Record  .......    12       When Your Account Will Be         
Investment Objective  .....     4      Dividends, Capital Gains                  Credited  ...............    19 
Investment Policies  ......     4        and Taxes  ..............    12       Selling Your Shares  ......    19 
Investment Risks  .........     5      The Share Price of the                  Exchanging Your Shares  ...    22 
Who Should Invest  ........     6        Fund  ...................    14       Important Information             
Implementation of Policies      7      General Information  ......    14         About Telephone                 
                                                                                 Transactions  ...........    23 
                                                                               Transferring Registration      23 
                                                                               Other Vanguard Services  ..    24 
</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>


FUND EXPENSES              The following table illustrates all expenses
                           and fees that you would incur as a 
                           shareholder of the Fund. The expenses set 
                           forth below are for the 1996 fiscal year. 

<TABLE>
<CAPTION>
 Shareholder Transaction Expenses 
 ----------------------------------------------------------------------------- 
<S>                                                                   <C>
Sales Load Imposed on Purchases  ..............                     None 
Sales Load Imposed on Reinvested Dividends  ...                     None 
Redemption Fees  ..............................                     None 
Exchange Fees  ................................                     None 

</TABLE>

<TABLE>
<CAPTION>
 Annual Fund Operating Expenses 
 ----------------------------------------------------------------------------- 
<S>                                                 <C>             <C>
Management & Administrative Expenses  ...                           0.28% 
Investment Advisory Fees  ...............                           0.35 
12b-1 Fees  .............................                           None 
Other Expenses 
Distribution Costs  .....................            0.02% 
                                                     0.04 
Miscellaneous Expenses  .................           ------ 
                                                                    0.06 
Total Other Expenses  ...................                           ---- 
    Total Operating Expenses  ...........                           0.69% 
                                                                    ==== 
</TABLE>

                           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 Fund.

                           The following example illustrates the expenses that
                           you would incur on a $1,000 investment over various
                           periods, assuming (1) a 5% annual rate of return and
                           (2) redemption at the end of each period. As noted in
                           the table above, the Fund charges no redemption fees
                           of any kind.

<TABLE>
<CAPTION>
 1 Year                3 Years                5 Years               10 Years 
 --------              ---------             ---------              ---------- 
<S>                    <C>                   <C>                    <C>
    $7                   $22                    $38                    $ 86 

</TABLE>
                           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                  The following financial highlights for a share 
HIGHLIGHTS                 outstanding throughout each period, insofar as they
                           relate to each of the five years in the period ended
                           November 30, 1996, have been audited by Price
                           Waterhouse LLP, independent accountants, whose report
                           thereon was unqualified. This information should be
                           read in conjunction with the Fund's financial
                           statements and notes thereto, which, together with
                           the remaining portions of the Fund's 1996 Annual
                           Report to Shareholders, are incorporated by reference
                           in the Statement of Additional Information and in
                           this Prospectus, and which appear, along with the
                           report of Price Waterhouse LLP, in the Fund's 1996
                           Annual Report to Shareholders. For a more complete
                           discussion of the Fund's performance, please see the
                           Fund's 1996 Annual Report to Shareholders, which may
                           be obtained without charge by writing to the Fund or
                           by calling our Investor Information Department at
                           1-800-662-7447.


2
<PAGE>

<TABLE>
<CAPTION>
                                                         Year Ended November 30,
                                       -------------------------------------------------------- 
                                         1996       1995        1994        1993        1992   
                                       --------   --------    ---------   ---------   --------- 
<S>                                    <C>        <C>         <C>         <C>         <C>      
Net Asset Value, Beginning of 
  Year .............................     12.03     $10.94      $12.89      $11.77      $ 9.82  
                                       --------   --------    ---------   ---------   --------- 
Investment Operations 
   Net Investment Income ...........       .43        .52         .53         .56         .56  
   Net Realized and Unrealized Gain 
     (Loss) on Investments  ........      1.29       1.26       (1.04)       1.03        1.92  
                                       --------   --------    ---------   ---------   ---------- 
    Total from Investment 
     Operations  ...................      1.72       1.78        (.51)       1.59        2.48  
                                       --------   --------    ---------   ---------   --------- 
Distributions 
   Dividends from Net Investment 
     Income  .......................      (.54)      (.51)       (.53)       (.47)       (.53) 
   Distributions from Realized 
     Capital Gains  ................      (.14)      (.18)       (.91)         --          --  
                                       --------   --------    ---------   ---------   --------- 
    Total Distributions ............      (.68)      (.69)      (1.44)       (.47)       (.53) 
                                       --------   --------    ---------   ---------   --------- 
Net Asset Value, End of Period  ....    $13.07     $12.03      $10.94      $12.89      $11.77  
                                       ========   ========    =========   =========   ========= 
Total Return  ......................     14.88%     17.10%      (4.35)%     13.87%      26.01%  
                                       ========   ========    =========   =========   ========= 
Ratios/Supplemental Data 
Net Assets, End of Year (Millions)      $  170     $  172      $  175      $  202      $  120  
Ratio of Expenses to Average Net 
   Assets ..........................      0.69%      0.75%       0.73%       0.71%       0.85% 
Ratio of Net Investment Income to 
   Average Net Assets ..............      3.43%      4.63%       4.68%       4.44%       4.80% 
Portfolio Turnover Rate  ...........        97%        46%         52%         81%         55% 
Average Commission Rate Paid  ......    $.0594        N/A         N/A         N/A         N/A  

</TABLE>
                          [RESTUBBED FROM TABLE ABOVE]
<TABLE>
<CAPTION>
                                                         Year Ended November 30,
                                       ------------------------------------------------------------ 
                                         1991         1990           1989       1988        1987 
                                       --------    ----------      --------   --------   ---------- 
<S>                                    <C>         <C>          <C>               <C>        <C>
Net Asset Value, Beginning of 
  Year .............................    $ 8.07      $  9.64     $ 8.71         $ 7.94     $  9.80 
                                       --------    ----------      --------   --------   ---------- 
Investment Operations 
   Net Investment Income ...........       .53          .57        .51            .55         .60 
   Net Realized and Unrealized Gain 
     (Loss) on Investments  ........      1.77        (1.58)       .99            .90       (1.95) 
                                       --------    ----------       --------   --------   ---------- 
    Total from Investment 
     Operations  ...................      2.30        (1.01)      1.50           1.45       (1.35) 
                                       --------    ----------      --------   --------   ---------- 
Distributions 
   Dividends from Net Investment 
     Income  .......................      (.55)        (.56)         (.57)       (.56)       (.51) 
   Distributions from Realized 
     Capital Gains  ................        --           --         --           (.12)         -- 
                                       --------    ----------      --------   --------   ---------- 
    Total Distributions ............      (.55)        (.56)         (.57)       (.68)       (.51) 
                                       --------    ----------      --------   --------   ---------- 
Net Asset Value, End of Period  ....    $ 9.82      $  8.07        $ 9.64      $ 8.71     $  7.94 
                                       ========    ==========      ========   ========   ========== 
Total Return  ......................     29.25%      (10.95)%       17.70%      18.85%     (14.82)% 
                                       ========    ==========      ========   ========   ========== 
Ratios/Supplemental Data 
Net Assets, End of Year (Millions)      $   55      $    44        $   58      $   69     $    73 
Ratio of Expenses to Average Net 
   Assets ..........................      0.81%        0.88%         0.84%       0.88%       0.85% 
Ratio of Net Investment Income to 
   Average Net Assets ..............      5.72%        6.35%         5.60%       6.52%       6.13% 
Portfolio Turnover Rate  ...........        57%          55%           55%         24%         45% 
Average Commission Rate Paid  ......       N/A          N/A           N/A         N/A         N/A 

</TABLE>
<PAGE>

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YIELD AND             From time to time the Fund may advertise its yield and 
TOTAL RETURN          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 the 
                      Fund refers to the average annual compounded rates of 
                      return over one-, five- and ten-year periods or the 
                      life of the Fund (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 the Fund 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 the Fund'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 the 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 the Fund to maintain its books and 
                      records, and so the advertised 30-day yield may not 
                      fully reflect the income paid to an investor's account 
                      or the yield reported in the Fund's reports to 
                      shareholders. 

                                                                               3
<PAGE>
INVESTMENT                 Vanguard Convertible Securities Fund, Inc. (the      
OBJECTIVE                  "Fund") is an open-end diversified investment       
                           company. The objective of the Fund is to provide    
The Fund seeks to          current income and long-term growth of capital by   
provide current            investing primarily in convertible securities. There
income and                 is no assurance that the Fund will achieve its      
long-term growth           objective.                                          
                                                                               
                           The investment objective of the Fund is fundamental 
                           and so cannot be changed without the approval of a  
                           majority of the Fund's shareholders.                
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INVESTMENT                 Under normal circumstances, at least 80% of the     
POLICIES                   Fund's assets will be invested in convertible       
                           securities. Convertible securities include corporate
The Fund invests in        bonds and preferred stocks which are convertible int 
convertible securities     common stock, as well as debt instruments with       
                           warrants or common stock attached. See              
                           "Implementation of Policies" for a description of   
                           convertible securities.                             
 
                           The remaining 20% of the Fund's assets may be
                           invested in non-convertible corporate or U.S.
                           Government fixed-income securities, common stocks,
                           and selected money market instruments. Within this
                           20% limit, the Fund is authorized to write covered
                           call options on its investments, although it does not
                           presently intend to do so. The Fund may also invest
                           more than 20% of its assets in money market
                           instruments when the Fund's investment adviser
                           determines that a temporary defensive position is
                           warranted.

                           In seeking to provide both current income and
                           long-term capital appreciation, the adviser will
                           emphasize the securities of companies with
                           above-average growth potential whose convertible
                           securities offer attractive yields. In general, each
                           security selected for the Fund will, in the opinion
                           of the adviser, be priced at a reasonable premium
                           relative to the price at which it can be converted
                           into common stock. In addition, the underlying common
                           stock will tend to be priced attractively on a
                           relative price-to-earnings ratio basis.

                           The Fund will predominantly invest in convertible
                           obligations which have been assigned a rating of B or
                           better by Moody's Investors Service, Inc. ("Moody's")
                           or Standard & Poor's Corporation ("Standard &
                           Poor's"). The Fund may also invest in non-rated
                           securities that, in the opinion of the Fund's
                           adviser, are equivalent in quality to a B rating or
                           better.

                           While the Fund will invest predominately in
                           securities of U.S.-based companies, up to 20% of the
                           Fund's assets may be invested in dollar-denominated
                           securities issued by foreign companies. See
                           "Implementation of Policies" for a description of
                           other investment practices of the Fund. The Fund is
                           responsible for voting the shares of all securities
                           it holds.

                           These policies are not fundamental and so may be
                           changed by the Board of Directors without shareholder
                           approval.

4
<PAGE>

INVESTMENT RISKS           Convertible securities are hybrid securities,
                           combining  the investment characteristics of both 
                           bonds and common stocks. Like a bond (or preferrede 
The Fund is subject        stock), a convertibl security pays a fixed interest 
to stock and bond          rate (dividend), but may be converted into common 
market risk                stock at a specific price or conversion rate. 


                           When the convertible's conversion price is
                           significantly above the price of the issuer's common
                           stock, a convertible security takes on the risk
                           characteristics of a bond. At such times, the price
                           of a convertible security will vary inversely with
                           changes in the level of interest rates. In other
                           words, when interest rates rise, convertible
                           securities prices will generally fall; conversely,
                           when interest rates fall, convertible securities
                           prices will generally rise. This interest rate risk
                           is in part offset by the income paid by the
                           convertible securities.

                           In contrast, when the conversion price of a
                           convertible security and the common stock price are
                           close to one another, a convertible security will
                           behave like a common stock. In such cases, the prices
                           of convertible securities may exhibit the short-term
                           price volatility characteristic of common stocks.

                           For these reasons, investors in the Fund must be
                           willing to accept the market risks of both bonds and
                           stocks. However, because convertible securities have
                           characteristics of both stocks and bonds, they tend
                           to be less sensitive to interest rate changes than
                           bonds of comparable maturity and quality, and less
                           sensitive to stock market changes than fully invested
                           common stock portfolios. Because of these factors and
                           the hybrid nature of convertibles, investors should
                           recognize that convertible securities are likely to
                           perform quite differently than broadly-based
                           measures of the stock and bond markets.


Credit Quality may         The market for convertible securities includes a    
be low                     larger proportion of small-to-medium size companies
                           than the broad stock market (as measured by such
                           indices as the Standard & Poor's 500 Composite Stock
                           Price Index). Companies which issue convertible
                           securities are often lower in credit quality.
                           Moreover, the credit rating of a company's
                           convertible issue is generally lower than the rating
                           of the company's conventional debt issues since the
                           convertible is normally a "junior" security. The
                           average credit quality of the Fund is expected to be
                           on a par with the universe of convertible securities
                           as a whole, and the Fund may invest up to 100% of its
                           assets in securities rated Ba (BB) or less.
                           Securities with such ratings are considered
                           speculative, and thus pose a greater risk of default
                           than investment grade securities. The following are
                           excerpts from the Moody's and Standard & Poor's
                           definitions for speculative debt obligations:

                           Moody's: Ba-rated bonds have "speculative elements,"
                           their future "cannot be considered assured," and
                           protection of principal and interest is "moderate"
                           and "not well safeguarded." B-rated bonds "lack
                           characteristics of a desirable investment" and the
                           assurance of interest or principal payments "may be
                           small."

                           Caa-rated bonds are "of poor standing" and "may be in
                           default" or may have "elements of danger with respect
                           to principal or interest."

                                                                               5
<PAGE>

                           Standard & Poor's: BB-rated bonds have "less
                           near-term vulnerability to default" than B- or
                           CCC-rated securities but face "major ongoing
                           uncertainties . . . which may lead to inadequate
                           capacity" to pay interest or principal. B-rated bonds
                           have a "greater vulnerability to default" than
                           BB-rated bonds and the ability to pay interest or
                           principal will likely be impaired by adverse business
                           conditions. CCC-rated bonds have a "currently
                           identifiable vulnerability to default" and, without
                           favorable business conditions, will be unable to
                           repay interest and principal.

                           Securities rated Ba or lower are considered to be 
                           "high-risk" securities and the credit quality of 
                           such securities can change suddenly and 
                           unexpectedly, and even recently-issued credit 
                           ratings may not fully reflect the actual risks of a 
                           particular security. For these reasons, it is the 
                           Fund's policy not to rely primarily on ratings 
                           issued by established credit rating agencies, but 
                           to utilize such ratings in conjunction with the 
                           Portfolio adviser's own independent and ongoing 
                           review of the companies represented in the Fund. 

                           In the past, the high yields from a portfolio of 
                           low-grade securities have more than compensated for 
                           the higher default rates on such securities. 
                           However, there can be no assurance that 
                           diversification will protect the Fund from 
                           widespread defaults brought about by a sustained 
                           economic downturn, or that yields will continue to 
                           offset default rates on high-yield securities in 
                           the future. A long-term track record on default 
                           rates, such as that for investment grade corporate 
                           bonds, does not exist for the high-yield securities 
                           market. It may be that future default rates on 
                           high-yield securities will be more widespread and 
                           higher than in the past, especially during periods 
                           of deteriorating economic conditions. 

                           The share price of the Fund will be influenced not 
                           only by changing interest rates, but also by the 
                           market's perception of credit quality and the 
                           outlook for economic growth. When economic 
                           conditions appear to be deteriorating, low- and 
                           medium-rated securities may decline in market 
                           value due to investors' heightened concern over 
                           credit quality, regardless of prevailing interest 
                           rates. 

                           Especially at such times, trading in the secondary 
                           market for high-yield securities may become thin 
                           and market liquidity may be significantly reduced. 
                           Even under normal conditions, the market of 
                           high-yield securities may be less liquid than the 
                           market for investment grade securities. There are 
                           fewer securities dealers in the high-yield market, 
                           and purchasers of high-yield securities are 
                           concentrated among a smaller group of securities 
                           dealers and institutional investors. 
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WHO SHOULD                 The Fund is intended for investors who are seeking a 
INVEST                     higher level of income than is normally available
                           from common stocks, as well as potential long-term 
Investors seeking          capital appreciation. Since the Fund may own non- 
current income and         investment grade securities of medium-to-small-sized 
long-term capital          companies, greater-than-average investment risk may 
growth                     be involved. Investors should be able to tolerate 
                           sharp, sometimes sudden fluctuations in the value of
                           their investment in pursuit of higher investment
                           returns in the long run.

6
<PAGE>

                           Although convertible securities exhibit
                           characteristics of both stocks and bonds, the Fund
                           does not represent a complete investment program.
                           Most investors should maintain diversified holdings
                           of securities with different risk
                           characteristics--including common stocks, bonds and
                           money market instruments. The Fund 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 Fund's shareholders. In
                           order to minimize such costs, the Fund has adopted
                           the following policies. The Fund 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 Fund has adopted exchange
                           privilege limitations as described in the section
                           "Exchange Privilege Limitations." Finally, the Fund
                           reserves the right to suspend the offering of its
                           shares.
- --------------------------------------------------------------------------------
IMPLEMENTATION             The Fund uses a number of investment vehicles to 
OF POLICIES                achieve its objective. 

The Fund invests in        The Fund invests primarily in convertible securities.
convertible securities     Convertible securities include corporate bonds, 
                           debentures, notes and preferred stocks which may be
                           converted into the common stock of the issuer at the
                           holder's option. Convertible securities obligate the
                           issuing company to pay a stated annual rate of
                           interest (or a stated dividend in the case of
                           convertible preferred stock) and to return the
                           principal amount after a specified period.
                           Convertible securities generally offer income yields
                           that are higher than the dividend yield, if any, of
                           the underlying common stock, but lower than the yield
                           of non-convertible debt securities issued by the
                           corporation or corporations of similar investment
                           quality. This fixed-income feature of convertible
                           securities is expected to enable the Fund to achieve
                           its current income objective. Convertible securities
                           are usually priced at a premium to their conversion
                           value--i.e., the value of the common stock received
                           if the holder were to exchange the convertible
                           security.

                           The holder of the convertible security may choose at
                           any time to exchange the convertible security for a
                           specified number of shares of the common stock of the
                           corporation, or occasionally a subsidiary company, at
                           a specified price, as defined by the corporation when
                           the security is issued. Accordingly, the value of the
                           convertible obligation may generally be expected to
                           increase (decrease) as the price of the associated
                           common stock increases (decreases). Also, the market
                           value of convertible securities tends to be
                           influenced by the level of interest rates and tends
                           to decline as interest rates increase and,
                           conversely, to increase as interest rates decline.

                           Convertible securities rank senior to common stocks
                           in an issuer's capital structure, but are junior to
                           non-convertible debt securities. As convertible
                           securities are considered junior to any
                           non-convertible debt securities issued by the
                           corporation, convertible securities are typically
                           rated by established credit rating services at one
                           level below the corporation's non-convertible debt.

                                                                               7
<PAGE>



The Fund may invest        Although it normally seeks to remain fully invested 
in short-term fixed        in convertible securities, the Fund may invest in 
income securities          certain short-term fixed income securities. Such
                           securities may be used to invest uncommitted cash
                           balances, to maintain liquidity to meet shareholder
                           redemptions, or to take a temporary defensive
                           position. 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.

The Fund may lend          The Fund may lend its investment securities on a 
its securities             short-term or a long-term basis to qualified 
                           institutional investors for the purpose of realizing
                           additional income. Loans of securities by the Fund
                           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.

The Fund may               The Fund may borrow money, subject to the limits set
borrow money               forth below, for temporary or emergency purposes, 
                           including the meeting of redemption requests which
                           might otherwise require the untimely disposition of
                           securities.

Portfolio turnover is      The Fund retains the right to sell securities 
not expected to            irrespective of how long they have been held. 
exceed 100%                However, depending on market conditions and other
                           factors, it is expected that the portfolio turnover
                           rate for the Fund will not normally exceed 100%.
                           Because of the Fund's recent change in investment
                           adviser, the turnover rate may exceed 100% over the
                           short-term. A turnover rate of 100% would occur, for
                           example, if all of the Fund's securities were
                           replaced within one year.

Derivative Investing       Derivatives are instruments whose values are linked
                           to or derived from an underlying security or index.
                           The most common and conventional types of derivative
                           securities are futures and options.

The Fund may invest        The Fund may invest in futures contracts and options,
in derivative              but only to a limited extent. Specifically, the Fund
securities                 may enter into futures contracts provided that not
                           more than 5% of its assets are required as a futures
                           contract deposit; in addition, the Fund may enter
                           into futures contracts and options transactions only
                           to the extent that obligations under such contracts
                           or transactions represent not more than 20% of the
                           Fund's assets.

                           Futures contracts and options may be used for several
                           common fund management strategies: to maintain cash
                           reserves while simulating full investment, to
                           facilitate trading, to reduce transaction costs, or
                           to seek higher investment returns when a specific
                           futures contract is priced more attractively than
                           other futures contracts or the underlying security or
                           index.

                           The Fund may use futures contracts for bona fide
                           "hedging" purposes. In executing a hedge, a manager
                           sells, for example, stock index futures to protect
                           against a decline in the stock market. As such, if
                           the market drops, the value of the futures position
                           will rise, thereby offsetting the decline in value of
                           the Fund's stock holdings.

8
<PAGE>
Futures contracts          The primary risks associated with the use of futures 
and options pose           contracts and options are: (i) imperfect correlation 
certain risks              between the change in market value of the stocks held
                           by the Fund and the prices of futures contracts and
                           options; 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 in those contracts whose
                           price fluctuations are expected to resemble those of
                           the Fund's underlying securities. The risk that the
                           Fund will be unable to close out a futures position
                           will be minimized by entering into such transactions
                           on a national exchange with an active and liquid
                           secondary market.

                           The risk of loss in trading 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 immediate and
                           substantial loss (or gain) to the investor. When
                           investing in futures contracts, the Fund will
                           segregate cash or other liquid portfolio securities
                           in the amount of the underlying obligation.

- --------------------------------------------------------------------------------
INVESTMENT                 The Fund has adopted certain limitations in an
LIMITATIONS                attempt to reduce its exposure to specific 
                           situations. Some of these limitations are that the 
The Fund has               Fund will not:
adopted certain            
fundamental                (a) with respect to 75% of the value of its total   
limitations                    assets, purchase the securities of any issuer   
                               (except obligations of the United States        
                               Government and its instrumentalities) if as a   
                               result the Fund would hold more than 10% of the 
                               outstanding voting securities of the issuer, or 
                               more than 5% of the value of the Fund's total   
                               assets would be invested in the securities of   
                               such issuer;
                                    
                           (b) invest more than 5% of its assets in the
                               securities of companies that have a continuous
                               operating history of less than three years;

                           (c) invest more than 25% of its assets in any one
                               industry;

                           (d) borrow money, except that the Fund 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 10% of the value of the
                               Fund's total assets (including the amount
                               borrowed) at the time the borrowing is made.
                               Whenever borrowings exceed 5% of the value of the
                               Fund's total assets, the Fund will not make any
                               additional investments;

                           (e) pledge, mortgage or hypothecate any of its assets
                               to an extent greater than 5% of its total assets.

                           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 the Fund's shareholders.

                                                                               9
<PAGE>


MANAGEMENT OF              The Fund is a member of The Vanguard Group of 
THE FUND                   Investment Companies, a family of more than 30 funds,
                           with more than 90 portfolios and total assets in 
Vanguard                   excess of $240 billion. Through their jointly-owned 
administers and            subsidiary, The Vanguard Group, Inc. ("Vanguard"), 
distributes the Fund       the Fund and the other funds in the Group obtain at
                           cost virtually all of their corporate management,
                           administrative, shareholder accounting 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 1996, the average expense
                           ratio (annual costs including advisory fees divided
                           by total net assets) for the Vanguard funds amounted
                           to approximately 0.29% compared to an average of
                           1.22% for other mutual funds (data provided by Lipper
                           Analytical Services).

                           The Officers of the Fund manage its day-to-day
                           operations and are responsible to the Fund's Board of
                           Directors. The Directors set broad policies for the
                           Fund and choose its Officers. A list of the Directors
                           and Officers of the Fund 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 Directors
                           (Trustees) of each fund. In addition, each fund bears
                           its own direct expenses, such as legal, auditing and
                           custodian fees.

                           Vanguard also provides distribution and marketing
                           service to the Vanguard 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 Vanguard's distribution costs.

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

INVESTMENT                 The Fund employs Oaktree Capital Management, LLC 
ADVISER                    ("Oaktree"), 550 South Hope Street, 22nd Floor, Los 
                           Angeles, California, 90071, under an investment
Oaktree Capital            advisory  agreement dated November 1, 1996, to manage
Management, LLC            the  investment and reinvestment of the assets of the
manages the Fund's         Fund and to continuously review, supervise and
investments                administer the Fund's investment program. Oaktree
                           discharges its responsibilities subject to the
                           control of the Officers and Directors of the Fund.
   
                           Oaktree specializes in selected niche investment
                           markets. The founders of Oaktree formed the company
                           in April of 1995 after having managed funds in the
                           convertible securities, distressed debt, and high
                           yield bond areas of Trust Company of the West since 
                           1985.
    
                           Larry W. Keele, Principal and one of the five
                           founders of Oaktree, serves as Portfolio Manager of
                           the Fund. Mr. Keele is supported by research and
                           other investment services provided by the
                           professional staff of Oaktree. As of November 30,
                           1996, Oaktree managed approximately $7.3 billion.


10
<PAGE>

The Fund pays Oaktree an advisory fee at the end of each fiscal quarter, 
calculated by applying a quarterly rate, based on the following annual 
percentage rates, to the Fund's average month-end net assets for the quarter 
(the "Basic Fee"): 

                                            
                           Net Assets                                  Rate  
                           -------------------                       -------- 
                           First $100 million                         0.425% 
                           Next $100 million                          0.400% 
                           Next $100 million                          0.375% 
                           Next $100 million                          0.350% 
                           Over $400 million                          0.325% 
                           
                           The advisory fee may be increased or decreased by an
                           incentive/penalty fee based on the Fund's total
                           return performance as compared to that of the First
                           Boston Convertible Securities Index. Under the fee
                           schedule, the Basic Fee may be increased or decreased
                           by as much as 50%.

                           The incentive/penalty fee structure will not be in
                           full operation until the quarter ending November 30,
                           1999. Until then, the incentive/penalty fee will be
                           calculated using certain transition rules. The
                           incentive/penalty fee schedule and calculation
                           process for the Portfolio's first three years are
                           described in the Portfolio's Statement of Additional
                           Information, which can be obtained by writing to or
                           calling Vanguard.

                           During the fiscal year ended November 30, 1996, the
                           total advisory fees paid by the Fund to Desai Capital
                           Management, Inc., the Fund's previous adviser,
                           represented an effective annual base rate of .35 of
                           1% of the Fund's average net assets.

                           The investment advisory agreement authorizes Oaktree
                           to select the brokers or dealers that will execute
                           the purchases and sales of portfolio securities for
                           the Fund and directs Oaktree to use its best efforts
                           to obtain the best available price and most favorable
                           execution with respect to all transactions for the
                           Fund. The full range and quality of brokerage
                           services are considered in making these
                           determinations.

                           The Fund has authorized Oaktree to pay higher
                           commissions in recognition of brokerage services felt
                           necessary for the achievement of better execution,
                           provided the adviser believes this to be in the best
                           interest of the Fund. If more than one broker can
                           obtain the best available price and favorable
                           execution of a transaction, then Oaktree is
                           authorized to choose a broker who, in addition to
                           executing the transaction, will provide research
                           services to Oaktree or the Fund. However, Oaktree
                           will not pay higher commissions specificaly for the
                           purpose of obtaining research services. The Fund may
                           direct Oaktree to use a particular broker for certain
                           transactions in exchange for commission rebates or
                           research services provided to the Fund.

                           The Fund's Board of Directors may, without the
                           approval of shareholders, provide for: (a) the
                           employment of a new investment adviser pursuant to
                           the terms of a new advisory agreement, either as a
                           replacement for an existing adviser or as an
                           additional adviser; (b) a change in the terms of an
                           advisory agreement; and (c)

                                                                              11
<PAGE>

                           the continued employment of an existing adviser on
                           the same advisory contract terms where a contract has
                           been assigned because of a change in control of the
                           adviser. Any such change will only be made upon not
                           less than 30 days' prior written notice to
                           shareholders of the Fund, which shall include
                           substantially the information concerning the adviser
                           that would have normally been included in a proxy
                           statement.
- --------------------------------------------------------------------------------
PERFORMANCE                The table in this section provides investment results
RECORD                     for the Fund for several periods throughout the
                           Fund's lifetime. The results shown represent the
                           Fund's "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 Standard & Poor's 500 Composite Stock
                           Price Index, a widely-used barometer of stock market
                           activity, and the Lehman Aggregate Bond Index, a
                           measure of the investment performance of the bond
                           market. The table does not make any allowance for
                           federal, state or local income taxes, which
                           shareholders must pay on a current basis. 

                           The results should not be considered a representation
                           of the total return from an investment made in the
                           Fund today. This information is provided to help
                           investors better understand the Fund and may not
                           provide a basis for comparison with other investments
                           or mutual funds which use a different method to
                           calculate performance.

                                        Average Annual Total Return for 
                                      Vanguard Convertible Securities Fund 

<TABLE>
<CAPTION>
                                                         Lehman 
Fiscal Periods    Vanguard Convertible    S&P 500     Aggregate Bond
Ended 11/30/96      Securities Fund        Index          Index 
 --------------   --------------------   ---------    -------------- 
<S>               <C>                    <C>         <C>        
 1 Year                  +14.88%           +27.9%         +6.1% 
 3 Years                 + 8.77            +21.0          +6.5 
 5 Years                 +13.05            +18.2          +7.9 
10 Years                 + 9.73            +15.2          +8.6 
Lifetime*                + 9.3             +14.9           N/A 

</TABLE>
                     * June 17, 1986, to November 30, 1996.

- --------------------------------------------------------------------------------
DIVIDENDS, CAPITAL         The Fund expects to pay quarterly dividends from net 
GAINS AND TAXES            investment income. Net capital gains distributions,
                           if any, will be made annually. 
The Fund will pay 
quarterly dividends        Dividend and capital gains distributions may be 
                           automatically reinvested or received in cash. See
                           "Choosing a Distribution Option" for a description of
                           these distribution methods.

                           In addition, in order to satisfy certain distribution
                           requirements of the Tax Reform Act of 1986, the Fund
                           may declare special year-end dividend and capital
                           gains distributions during December. Such
                           distributions, if received by shareholders by January
                           31, are deemed to have been paid by the Fund and
                           received by shareholders on December 31 of the prior
                           year.

12
<PAGE>

                           The Fund intends to continue to qualify for taxation
                           as a "regulated investment company" under the
                           Internal Revenue Code so that it will not be subject
                           to federal income tax to the extent its income is
                           distributed to shareholders. Dividends paid by the
                           Fund from net investment income, whether received in
                           cash or reinvested in additional shares, will be
                           taxable to shareholders as ordinary income. For
                           corporate investors, a portion of dividends from net
                           investment income will qualify for the intercorporate
                           dividends-received deduction. However, the portion of
                           the dividends so qualified depends on the aggregate
                           taxable qualifying dividend income received by the
                           Fund from domestic (U.S.) sources.

                           Distributions paid by the Fund from net 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 Fund. Capital gains
                           distributions are made when the Fund realizes net
                           capital gains on sales of portfolio securities during
                           the year. The Fund 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 the Fund realizes net
                           capital losses.

                           Note that if you accept capital gains distributions
                           in cash, instead of reinvesting them in additional
                           shares, you are in effect reducing the capital at
                           work for you in the Fund. Also, keep in mind that if
                           you purchase shares in the Fund 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 Fund will notify you annually as to the tax
                           status of dividend and capital gains distributions
                           paid by the Fund.

A Capital gain or loss     A sale of shares of the Fund is a taxable event and
may be realized upon       may result in a capital gain or loss. A capital gain
exchange or                or loss  may be realized from an ordinary redemption
redemption                 of shares or an exchange of shares between two mutual
                           funds (or two portfolios of a mutual fund).

                           Dividend distributions, capital gains distributions,
                           and capital gains or losses from redemptions and
                           exchanges may be subject to state and local taxes.

                           The Fund 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
                           Taxpayer Identification Number and by certifying that
                           you are not subject to backup withholding.

                           The Fund has obtained a Certificate of Authority to
                           do business as a foreign corporation in Pennsylvania
                           and does business and maintains an office in that
                           state. In the opinion of counsel, the shares of the
                           Fund will be exempt from Pennsylvania personal
                           property taxes.

                                                                              13
<PAGE>
                           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 Fund. The
                           Fund is managed without regard to tax ramifications.
- --------------------------------------------------------------------------------

THE SHARE PRICE            The Fund's share price or "net asset value" per share
OF THE FUND                is calculated by dividing the total assets of the    
                           Fund, less all liabilities, by the total number of
                           shares outstanding. The net asset value is determined
                           as of the close of the New York Stock Exchange
                           (generally 4:00 p.m. Eastern time) on each day that
                           the Exchange is open for trading.

                           The Fund's net asset value includes interest on
                           fixed-income securities which is accrued daily. Fund
                           securities which are traded both over-the-counter and
                           on a stock exchange will be valued according to the
                           broadest and most representative market, and it is
                           expected that for convertible securities, preferred
                           stock, bonds, and other fixed-income securities this
                           ordinarily will be the over-the-counter market.
                           Valuation of such securities will be at the latest
                           quoted bid price.

                           Common stocks that are listed on a securities
                           exchange are valued at the last quoted sales price on
                           the day the valuation is made. Common stocks which
                           are listed on an exchange but which are not traded on
                           the valuation date are valued at the mean between the
                           bid and the ask prices.

                           Convertible bonds and other debt instruments may be
                           valued on the basis of prices provided by a pricing
                           service when such prices are believed by the
                           Directors to reflect the fair market value of such
                           securities. The prices provided by a pricing service
                           may be determined without regard to bid or last sale
                           prices but take into account institutional size
                           trading in similar groups of securities and any
                           developments related to specific securities.
                           Short-term instruments maturing within 60 days of the
                           valuation date may be valued at cost, plus or minus
                           any amortized discount or premium. Other assets and
                           securities for which no quotations are readily
                           available will be valued in good faith using methods
                           determined by the Board of Directors.

                           The Fund's price per share can be found daily in the
                           mutual fund section of most major newspapers under
                           the heading of Vanguard Group.

GENERAL                    The Fund is a Maryland corporation. The Fund's
INFORMATION                Articles  of Incorporation permit the Directors to
                           issue 1,000,000,000 shares of common stock, with a
                           $.001 par value. The Board of Directors has the power
                           to designate one or more classes ("Portfolios") of
                           shares of common stock and to classify or reclassify
                           any unissued shares with respect to such Portfolios.
                           Currently the Fund is offering one class of shares.

                           The shares of the Fund are fully paid and
                           nonassessable; have no preferences as to conversion,
                           exchange, dividends, retirement or other features;
                           and have no pre-emptive rights. Such shares have
                           non-cumulative voting rights, meaning that

14
<PAGE>

                           the holders of more than 50% of the shares voting for
                           the election of Directors can elect 100% of the
                           Directors if they so choose. A shareholder is
                           entitled to one vote for each full share held (and a
                           fractional vote for each fractional share held).

                           Annual meetings of shareholders will not be held
                           except as required by the Investment Company Act of
                           1940 and other applicable law. If requested in
                           writing by the holders of not less than 10% of the
                           outstanding shares of the Fund, an annual meeting
                           will be held to vote on the removal of a Director or
                           Directors of the Fund.

                           All securities and cash are held by CoreStates Bank,
                           N.A., Philadelphia, PA. The Vanguard Group, Inc.,
                           Valley Forge, PA, serves as the Fund's Transfer and
                           Dividend Disbursing Agent. Price Waterhouse LLP
                           serves as independent accountants for the Fund and
                           will audit its financial statements annually. The
                           Fund is not involved in any litigation.
- --------------------------------------------------------------------------------

                                                                              15
<PAGE>

                              SHAREHOLDER GUIDE 

OPENING AN                 You may open a regular (non-retirement) account,
ACCOUNT AND                either by mail or wire. Simply complete and return an
PURCHASING                 Account Registration Form and any required legal
SHARES                     documentation,  indicating the amount you wish to
                           invest. Your purchase must be equal to or greater
                           than the $3,000 minimum initial investment
                           requirement ($1,000 for Uniform Gifts/Transfers to
                           Minors Act accounts and IRAs). 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 $1,000 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 form or have any questions about
                           this Fund, please call our Investor Information
                           Department at 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.

                           The Fund's shares are purchased at the
                           next-determined net asset value after your investment
                           has been received. The Fund is offered on a no-load
                           basis (i.e., there are no sales commissions or 12b-1
                           fees).

Purchase Restrictions      1) Because of the risks associated with common stock
                              investments, the Fund is intended to be a long-
                              term investment vehicle and is not designed to
                              provide investors with a means of speculating on
                              short-term stock market movements. Consequently,
                              the Fund reserves the right to reject any specific
                              purchase (and exchange purchase) request. The Fund
                              also reserves the right to suspend the offering of
                              shares for a period of time.

                           2) Vanguard will not accept third-party checks to
                              purchase shares of the Fund. Please be sure your
                              purchase check is made payable to The Vanguard
                              Group.

Additional                 Subsequent investments to regular accounts may be
investments                made by mail ($100 minimum), wire ($1,000 minimum),
                           exchange from another Vanguard Fund account ($100
                           minimum), 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.

16
<PAGE>


<TABLE>
<S>                    <C>                                  <C>
                                                                    ADDITIONAL INVESTMENTS 
                               NEW ACCOUNT                           TO EXISTING ACCOUNTS 
Purchasing By Mail    Please include the amount of 
Complete and sign     your initial investment on            Additional investments should include 
the enclosed Account  the registration form, make           the Invest-by-Mail remittance form 
Registration Form     your check payable to The             attached to your Fund confirmation 
                      Vanguard Group-82 and mail            statements. Please make your check 
                      to:                                   payable to The Vanguard Group-82, 
                                                            write your account number on your 
                      Vanguard Financial Center             check and, using the return envelope 
                      P.O. Box 2600                         provided, mail to the address 
                      Valley Forge, PA 19482-2600           indicated on the Invest-by-Mail Form. 
                      
For express           Vanguard Financial Center             All written requests should be mailed 
or registered mail,   455 Devon Park Drive                  to one of the addresses indicated for 
send to:              Wayne, PA 19087-1815                  new accounts. Do not send registered 
                                                            or express mail to the post office 
                                                            box address. 

</TABLE>
                           -----------------------------------------------------
Purchasing By Wire                  CORESTATES BANK, N.A. 
Money should be                     ABA 031000011 
wired to:                           CORESTATES NO. 0101 9897 
                                    ATTN VANGUARD 
Before Wiring                       VANGUARD CONVERTIBLE SECURITIES FUND 
Please contact                      ACCOUNT NUMBER 
Client Services                     ACCOUNT REGISTRATION 
(1-800-662-2739)
                           To assure proper receipt, please be sure your bank
                           includes the name of the Fund selected, 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 above
                           after completing your wire arrangement. Note: Federal
                           Funds wire purchase orders will be accepted only when
                           the Fund and Custodian Bank are open for business.
                           -----------------------------------------------------
Purchasing By              You may open a new account or purchase additional
Exchange (from a           shares by making an exchange from an existing
Vanguard account)          Vanguard account. Please call our Client Services
                           Department at 1-800-662-2739. The new account will
                           have the same registration as the existing account.
                           However, the Fund reserves the right to refuse any
                           exchange purchase request.
                           -----------------------------------------------------

Purchasing By Fund         The Fund Express Special Purchase option lets you
Express                    move money from your bank account to your Vanguard
Special Purchase and       account on an "as needed" basis. Or if you choose the
Automatic Investment       Automatic  Investment option, money will be moved
                           automatically from your bank account to your Vanguard
                           account on the schedule (monthly, bimonthly [every
                           other month], quarterly, semi-annually or annually)
                           you select. To estab-


                                                                              17
<PAGE>

                           lish these Fund Express options, please provide the
                           appropriate information on the Account Registration
                           Form. We will send you a confirmation of your Fund
                           Express service; please wait two weeks before using
                           the service.

- --------------------------------------------------------------------------------
CHOOSING A                 You must select one of three distribution options: 
DISTRIBUTION 
OPTION                     1. Automatic Reinvestment Option--Both dividends and
                              capital gains distributions will be reinvested in
                              additional Fund 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 Fund 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                Under Federal tax laws, the Fund is required to 
                           distribute net capital gains and dividend income to
Investors should ask       Fund shareholders. These distributions are made to
about the timing of        all shareholders who own Fund shares as of the
capital gains and          distribution's record date, regardless of how long
dividend                   the shares have been owned. Purchasing shares just 
distributions before       prior to the record date could have a significant
investing                  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
                           Fund shares for just a short period of time. (Taxes
                           are due on the distributions even if the dividend or
                           gain is reinvested in additional Fund 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.

                           Prospective investors should, therefore, inquire
                           about potential distributions before investing. The
                           Fund's annual capital gains distribution normally
                           occurs in December, while income dividends are
                           generally paid quarterly in March, June, September
                           and December. For additional information on
                           distributions and taxes, see the section titled
                           "Dividends, Capital Gains, and Taxes."
- --------------------------------------------------------------------------------
18
<PAGE>

IMPORTANT                  The easiest way to establish optional Vanguard
INFORMATION                services on your account is to select the options you
                           desire when you complete your Account Registration
Establishing Optional      Form. If you wish to add shareholder options later,
Services                   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. If a 
                           certificate is lost, you may incur an expense to
                           replace it.

Broker-Dealer              If you purchase shares in Vanguard Funds through a 
Purchases                  registered broker-dealer or investment adviser, the 
                           broker-dealer or adviser may charge a service fee. 

Cancelling Trades          The Fund 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      You may receive a prospectus for the Fund or any of
Delivery                   the  Vanguard Funds in an electronic format. Please
                           call 1-800-231-7870 for additional information or see
                           "Other Vanguard Services--Computer Access." You may
                           also receive a paper copy of the prospectus, by
                           calling 1-800-662-7447.

- --------------------------------------------------------------------------------
WHEN YOUR                  Your trade date is the date on which your account is 
ACCOUNT WILL BE            credited. If your purchase is made by check, Federal 
CREDITED                   Funds wire or exchange and is received by the close
                           of regular trading on 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 regular trading on the Exchange,
                           your trade date is the next business day. Your shares
                           are purchased at the net asset value determined on
                           your trade date.

                           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.

                           The Fund reserves the right to suspend the offering
                           of shares for a period of time. The Fund also
                           reserves the right to reject any specific purchase
                           request.
- --------------------------------------------------------------------------------

SELLING YOUR               You may withdraw any portion of the funds in your
SHARES                     account  by redeeming shares at any time. (Please see
                           "Important Redemption Information.") You generally
                           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.

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

                                                                              19
<PAGE>

Selling By Mail            Requests should be mailed to Vanguard Financial
                           Center, Vanguard Convertible Securities Fund, P.O.
                           Box 1120, Valley Forge, PA 19482. (For express or
                           registered mail, send your request to Vanguard
                           Financial Center, Vanguard Convertible Securities
                           Fund, 455 Devon Park Drive, Wayne, PA 19087.)

                           The redemption price of shares will be the Fund's net
                           asset value next determined after Vanguard has
                           received all required documents in Good Order.
                           -----------------------------------------------------
Definition of Good         Good Order means that the request includes the
Order                      following: 

                           1. The account number and Fund name. 
                           2. The amount of the transaction (specified in
                              dollars or shares).
                           3. The 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 are holding for the
                              account. 

                           If you have any questions about this definition as it
                           pertains to your request, please call our Client
                           Services Department at 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 Note: As a
                           protection against fraud, your telephone mail
                           redemption privilege will be suspended for 15
                           calendar days following any expedited address change
                           to your account. An expedited address change is one
                           that is made by telephone, by Vanguard Online, or in
                           writing, without the signatures of all account
                           owners. Please see "Important Information About
                           Telephone Transactions."
                           -----------------------------------------------------
Selling By Fund            If you select the Fund Express Automatic Withdrawal 
Express                    option, money will be automatically moved from your 
                           Vanguard Fund account to your bank account according
Automatic Withdrawal &     to the schedule you have selected. The Special 
Special Redemption         Redemption option lets you move money from your
                           Vanguard account to your bank account on an "as
                           needed" basis. To establish these Fund Express
                           options, please provide the appropriate information
                           on the Account Registration Form. We will send you a
                           confirmation of your Fund Express service; please
                           wait two weeks before using the service.
                           -----------------------------------------------------
Selling By Exchange        You may sell shares of the Fund by making an exchange
                           to another Vanguard Fund account. Please see
                           "Exchanging Your Shares" for details.
                           -----------------------------------------------------
Important                  Shares purchased by check or Fund Express may be
Redemption                 redeemed  at any time. However, your redemption
Information                proceeds will not be paid until payment for the
                           purchase is collected, which may take up to ten
                           calendar days.


20
<PAGE>
Delivery of                Redemption requests received by telephone prior to
Redemption Proceeds        the close of regular trading on the New York Stock
                           Exchange 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 (generally 4:00 p.m., Eastern
                           time) 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 except
                           as described on page 20 in Important Redemption
                           Information.

                           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 Fund reserves the right to revise or terminate
                           the telephone redemption privilege at any time.

                           The Fund 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 Directors determines that it would be
                           detrimental to the best interests of the Fund's
                           remaining shareholders to make payment in cash, the
                           Fund may pay redemption proceeds in excess of
                           $250,000 in whole or in part by a distribution in
                           kind of readily marketable securities.
                           -----------------------------------------------------
Vanguard's Average         If you make a redemption from a qualifying account, 
Cost Statement             Vanguard will send you an Average Cost Statement
                           which provides you with the tax basis of the shares
                           you redeemed. Please see "Statements and Reports" for
                           additional information.
                           -----------------------------------------------------

Low Balance Fee and        Due to the relatively high cost of maintaining
Minimum Account            smaller  accounts, the Fund will automatically deduct
Balance Requirement        a $10 annual fee from non-retirement accounts with
                           balances falling below $2,500 ($500 for Uniform
                           Gifts/Transfers to Minors Act accounts). The fee
                           generally will be waived for investors whose
                           aggregate Vanguard assets exceed $50,000.

                           In addition, the Fund reserves the right to liquidate
                           any non-retirement account that is below the minimum
                           initial investment amount of $3,000. If at any time
                           the total investment does not have a value of at
                           least $3,000, you may be notified that your account
                           is below the Fund'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.

                           Vanguard will not liquidate your account if it has
                           fallen below $3,000 solely as a result of declining
                           markets (i.e., a decline in a Fund's net asset
                           value).

                                                                              21
<PAGE>


EXCHANGING YOUR            Should your investment goals change, you may exchange
SHARES                     your shares of Vanguard Convertible Securities Fund
                           for those of other available Vanguard Funds. 
Exchanging By 
Telephone                  When exchanging shares by telephone, please have
Call Client Services       ready the Fund name, account number, Social Security
(1-800-662-2739)           Number or Employer Identification Number listed on
                           the account, and the exact name and address in which
                           the account is registered. Requests for telephone
                           exchanges received prior to the close of trading on
                           the New York Stock Exchange (generally 4:00 p.m.
                           Eastern time) are processed at the close of business
                           that same day. Requests received after the close of
                           the Exchange are processed the next business day.
                           Telephone exchanges are not accepted into or from
                           non-retirement investments in Vanguard Balanced Index
                           Fund, Vanguard Index Trust, Vanguard REIT Index
                           Portfolio, Vanguard International Equity Index Fund
                           and Vanguard Quantitative Portfolios. If you
                           experience difficulty in making a telephone exchange,
                           your exchange request may be made by regular or
                           express mail, and it will be implemented at the
                           closing net asset value on the date received by
                           Vanguard provided the request is received in Good
                           Order.
                           -----------------------------------------------------

Exchanging By Mail         Please be sure to include on your exchange request
                           the name and account number of your current Fund, the
                           name of the Fund 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 Convertible
                           Securities Fund, P.O. Box 1120, Valley Forge, PA
                           19482. (For express or registered mail, send your
                           request to Vanguard Financial Center, Vanguard
                           Convertible Securities Fund, 455 Devon Park Drive,
                           Wayne, PA 19087.)
                           -----------------------------------------------------

Important Exchange         Before you make an exchange, you should consider the
Information                following:
 
                           o  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).

                           o  An exchange is treated as a redemption and a
                              purchase. Therefore, you could realize a taxable
                              gain or loss on the transaction.

                           o  Exchanges are accepted only if the registrations
                              and the taxpayer identification numbers of the two
                              accounts are identical.

                           o  The shares to be exchanged must be on deposit and
                              not held in certificate form.

                           o  New accounts are not currently accepted in
                              Vanguard/Windsor Fund.

                           o  The redemption price of shares redeemed by
                              exchange is the net asset value next determined
                              after Vanguard has received the required
                              documentation in Good Order.

                           o  When opening a new account by exchange, you must
                              meet the minimum investment requirement of the new
                              Fund.


22
<PAGE>

                           Every effort will be made to maintain the exchange
                           privilege. However, the Fund reserves the right to
                           revise or terminate its provisions, limit the amount
                           of or reject any exchange, as deemed necessary, at
                           any time. 

                           The exchange privilege is only available in states in
                           which shares of the Fund are registered for sale. The
                           Fund's shares are currently registered for sale in
                           all 50 states and the Fund intends to maintain such
                           registration.
- --------------------------------------------------------------------------------
EXCHANGE                   The Fund's exchange privilege is not intended to
PRIVILEGE                  afford shareholders a way to speculate on short-term
LIMITATIONS                movements in the market. Accordingly, in order to
                           prevent excessive use of the exchange privilege that
                           may potentially disrupt the management of the Fund
                           and increase transaction costs, the Fund 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 the Fund
                           during any twelve month period. Notwithstanding these
                           limitations, the Fund 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.
- --------------------------------------------------------------------------------

IMPORTANT                  The ability to initiate redemptions (except wire 
INFORMATION                redemptions) and exchanges by telephone is
ABOUT TELEPHONE            automatically established on your account unless you
TRANSACTIONS               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 Fund; (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 made by mail will be made payable to
                              the registered shareowner and mailed to the
                              address of record, only.

                           Neither the Fund 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               You may transfer the registration of any of your Fund
REGISTRATION               shares to another person by completing a transfer
                           form and sending it to: Vanguard Financial Center,

                                                                              23
<PAGE>


                           P.O. Box 1110, Valley Forge, PA 19482. Attention:
                           Transfer Department. The request must be in Good
                           Order. Before mailing your request, please call our
                           Client Services Department (1-800-662-2739) for full
                           instructions.
- --------------------------------------------------------------------------------

STATEMENTS AND             Vanguard will send you a confirmation statement each
REPORTS                    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.

                           Vanguard's Average Cost Statement provides you with
                           the average cost of shares redeemed from your account
                           during the calendar year, 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.

                           Financial reports on the Fund will be mailed to you
                           semi-annually, according to the Fund's fiscal
                           year-end.

- --------------------------------------------------------------------------------
OTHER VANGUARD             For more information about any of these services,
SERVICES                   please call our Investor Information Department at 
                           1-800-662-7447. 

Vanguard Direct            With Vanguard's Direct Deposit Service, most U.S. 
Deposit Service            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         Vanguard's Automatic Exchange Service allows you to
Exchange Service           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              Vanguard's Fund Express allows you to transfer money 
Express                    between your Fund 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.

                           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          Vanguard's Dividend Express allows you to transfer
Express                    your dividends and/or capital gains distributions 
                           automatically from your Fund account, one business
                           day after


24
<PAGE>


                           the Fund'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 our Investor Information
                           Department (1-800-662-7447) for a Vanguard Dividend
                           Express application.

Vanguard                   Vanguard's Tele-Account is a convenient, automated 
Tele-Account               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. In addition, you may perform
                           investment exchanges of Vanguard Fund shares and
                           redemptions by check using Tele-Account. 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).

Computer Access            Vanguard Online allows you to obtain information via
Vanguard Online            your personal computer on Fund share price, yield,
Keyword: vanguard          and total return. Vanguard Online is offered through
                           America Online (AOL). To establish an AOL account,
                           call 1-800-238-6336.

Vanguard on the            Vanguard sponsors an education-oriented website
World Wide Web             offering news and information about Vanguard Funds
http://www.vanguard.com    and services, as well as interactive, easy-to-use
                           investment planning tools.


                                                                              25
<PAGE>





                      (This page intentionally left blank.)






26
<PAGE>
                                                              LOGO

                                                       P R O S P E C T U S

                                                          MARCH 7, 1997 

                  LOGO
                  ------ 
                  The Vanguard Group 
                  Vanguard Financial Center 
                  Valley Forge, PA 19482 

                  Investor Information 
                   Department: 
                  1-800-662-7447 

                  Client Services 
                   Department: 
                  1-800-662-2739 

                  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             A member of
                  Valley Forge, PA 19482            The Vanguard Group(R)

P082

<PAGE>


                                    PART B
 
                  VANGUARD CONVERTIBLE SECURITIES FUND, INC.
 
                     STATEMENT OF ADDITIONAL INFORMATION 
                                MARCH 7, 1997 

   This Statement is not a prospectus but should be read in conjunction with 
the Fund's current Prospectus dated March 7, 1997. To obtain the Prospectus 
please call: 

                       INVESTOR INFORMATION DEPARTMENT 
                                1-800-662-7447 

                              TABLE OF CONTENTS 

                                                                      Page 
                                                                    -------- 
Investment Limitations  .........................................      B-1 
Purchase of Shares  .............................................      B-2 
Redemption of Shares  ...........................................      B-3 
Management of the Fund  .........................................      B-3 
Directors and Officers  .........................................      B-5 
Investment Advisory Services  ...................................      B-7 
Portfolio Transactions  .........................................      B-9 
General Information  ............................................     B-10 
Yield and Total Return  .........................................     B-10 
Comparative Indexes  ............................................     B-10 
Financial Statements  ...........................................     B-13 
Appendix--Description of Securities and Ratings  ................     B-14 


                            INVESTMENT LIMITATIONS 

   The following restrictions are fundamental policies and cannot be changed 
without approval of the holders of a majority of the outstanding shares of 
the Fund or, if less, 67% of the shares represented at a meeting of 
shareholders at which the holders of 50% or more of the shares are 
represented. The Fund may not under any circumstances: 

       1. Borrow money, except that the Fund 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 10% of the value of the Fund's total assets 
   (including the amount borrowed) at the time the borrowing is made. 
   Whenever borrowings exceed 5% of the value of the Fund's total assets, the 
   Fund will not make any additional investments; 

       2. With respect to 75% of the value of its total assets, purchase the 
   securities of any issuer (except obligations of the United States 
   government and its instrumentalities) if as a result the Fund would hold 
   more than 10% of the outstanding voting securities of the issuer, or more 
   than 5% of the value of the Fund's total assets would be invested in the 
   securities of such issuer; 

       3. Invest for the purpose of exercising control of management of any 
   company; 

                                                                             B-1
<PAGE>


       4. Invest in securities of other investment companies, except as they 
   may be acquired as part of a merger, consolidation or acquisition of 
   assets or otherwise to the extent permitted by Section 12 of the 
   Investment Company Act of 1940 (the "1940 Act"). The Fund will invest only 
   in investment companies which have investment objectives and investment 
   policies consistent with those of the Fund; 

       5. Engage in the business of underwriting securities issued by other 
   persons, except to the extent that the Fund may technically be deemed to 
   be an underwriter under the Securities Act of 1933, as amended, in 
   disposing of investment securities; 

       6. Purchase or otherwise acquire any security if, as a result, more 
   than 15% of its net assets would be invested in securities that are 
   illiquid (including the Fund's investment in The Vanguard Group, Inc.); 

       7. Invest in commodities or real estate, although the Fund may purchase 
   and sell securities of companies which deal in real estate, or interests 
   therein, and the Fund may purchase covered call options as described in 
   the prospectus; 

       8. Purchase securities on margin or sell any securities short; 

       9. Invest more than 5% of the assets of the Fund, at the time of 
   investment, in the securities of any issuers which have (with 
   predecessors) a record of less than three years' continuous operation; 

       10. Purchase or retain any security if (i) one or more officers, 
   directors or partners of the Fund or its investment adviser individually 
   own or would own, directly or beneficially, more than 1/2 of 1 per cent of 
   the securities of such issuer, and (ii) in the aggregate such persons own 
   or would own more than 5% of such securities; 

       11. Make loans except (i) by purchasing bonds, debentures or similar 
   obligations (including repurchase agreements, subject to the limitation 
   described in (6) above), which are publicly distributed, and (ii) by 
   lending its securities to banks, brokers, dealers and other financial 
   institutions so long as such loans are not inconsistent with the 
   Investment Company Act or the Rules and Regulations or interpretations of 
   the Securities and Exchange Commission (the "Commission") thereunder; 

       12. Pledge, mortgage, or hypothecate any of its assets to an extent 
   greater than 5% of its total assets; 

       13. Invest directly in interests in oil, gas or other mineral 
   exploration or development programs; and 

       14. Invest more than 25% of the value of its total assets in any one 
   industry. 


   The above mentioned investment limitations are considered at the time 
investment securities are purchased. Notwithstanding these limitations, the 
Fund may own all or any portion of the securities of, or make loans to, or 
contribute to the costs or other financial requirements of any company which 
will be wholly-owned by the Fund and one or more other investment companies 
and is primarily engaged in the business of providing, at-cost, management, 
administrative, distribution or related services to the Fund and other 
investment companies. See "The Vanguard Group." 

                              PURCHASE OF SHARES 


   The Fund reserves the right in its sole discretion (i) to suspend the 
offering of its shares, (ii) to reject purchase orders when in the judgment 
of management such rejection is in the best interest of the Fund, and (iii) 
to reduce or waive the minimum investment for or any other restrictions on 
initial and subsequent investments for certain fiduciary accounts or under 
circumstances where certain economies can be achieved in sales of the Fund's 
shares. 


B-2
<PAGE>

                             REDEMPTION OF SHARES 

   The Fund may suspend redemption privileges or postpone the date of payment 
for redeemed shares (i) during any period that the New York Stock Exchange is 
closed, or trading on the Exchange is restricted, as determined by the 
Commission; (ii) during any period when an emergency exists, as defined by 
the rules of the Commission, as a result of which it is not reasonably 
practicable for the Fund to dispose of securities owned by it or fairly 
determine the value of its assets; and (iii) for such other periods as the 
Commission may permit. 

   No charge is made by the Fund for redemptions. Any redemption may be more 
or less than the shareholder's cost, depending on the current market value of 
the securities held by the Fund. 

   The Fund has made an election with the Commission to pay in cash all 
redemptions requested by any shareholder of record limited in amount during 
any 90-day period to the lesser of $250,000 or 1% of the net assets of the 
Fund at the beginning of such period. Such commitment is irrevocable without 
the prior approval of the Commission. Redemptions in excess of the above 
limits may be paid in whole or in part in investment securities or in cash, 
as the Directors may deem advisable; however, payment will be made wholly in 
cash unless the Directors believe that economic or market conditions exist 
which would make such a practice detrimental to the best interests of the 
Fund. If redemptions are paid in investment securities, such securities will 
be valued as set forth in the Prospectus under "The Fund's Share Price," and 
a redeeming shareholder would normally incur brokerage expenses if he 
converted these securities to cash. 

                            MANAGEMENT OF THE FUND 
                              THE VANGUARD GROUP 

   Vanguard Convertible Securities Fund is a member of The Vanguard Group of 
Investment Companies. Through their jointly-owned subsidiary, The Vanguard 
Group, Inc. ("Vanguard"), the Fund 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 several of the Vanguard Funds. 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 Directors (Trustees) of each Fund. In 
addition, each Fund bears its own direct expenses such as legal, auditing and 
custodian fees. 

   The Fund's Officers are also Officers and employees of Vanguard. No 
Officer or employee owns, or is permitted to own, any securities of any 
external adviser for the Funds. 


   Vanguard adheres to a Code of Ethics established pursuant to Rule 17j-1 
under the Investment Company Act of 1940. The Code is designed to prevent 
unlawful practices in connection with the purchase or sale of securities by 
persons associated with Vanguard. Under Vanguard's Code of Ethics, certain 
Officers and employees of Vanguard who are considered access persons are 
permitted to engage in personal securities transactions. However, such 
transactions are subject to procedures and guidelines substantially similar 
to those recommended by the mutual fund industry and approved by the U.S. 
Securities and Exchange Commission. 

   Vanguard was established and operates under a Funds' Service Agreement 
which was approved by the shareholders of each of the Funds. The amounts 
which each of the Funds has invested in Vanguard are 


                                                                             B-3
<PAGE>


adjusted from time to time in order to maintain the proportionate 
relationship between each Fund's relative net assets and its contribution to 
Vanguard's capital. At November 30, 1996, the Fund had contributed capital of 
$16,000 to Vanguard, representing .10% of Vanguard's capitalization. The 
Funds' Service Agreement provides for the following arrangement: (1) each 
Vanguard Fund may invest a maximum of 0.40% of its assets in Vanguard; and 
(2) there is no restriction on the maximum aggregate cash investment that the 
Vanguard Funds may make in Vanguard. 

   Management. Corporate management and administrative services include: (1) 
executive staff; (2) accounting and financial; (3) legal and regulatory; (4) 
shareholder account maintenance; (5) monitoring and control of custodian 
relationships; (6) shareholder reporting; and (7) review and evaluation of 
advisory and other services provided to the Funds by third parties. During 
the fiscal year ended November 30, 1996, the Fund's share of actual net costs 
of operation relating to management and administrative services provided by 
Vanguard totaled approximately $457,000. 


   Distribution. Vanguard provides all distribution and marketing activities 
for the Funds in the Group. Vanguard Marketing Corporation, a wholly-owned 
subsidiary of Vanguard, acts as Sales Agent for the shares of the Funds, in 
connection with any sales made directly to investors in the states of 
Florida, Missouri, New York, Ohio, Texas and such other states as it may be 
required. 


   The principal distribution expenses are for advertising, promotional 
materials and marketing personnel. Distribution services may also include 
organizing and offering to the public, from time to time, one or more new 
investment companies which will become members of the Group. The Directors 
and Officers of Vanguard determine the amount to be spent annually on 
distribution activities, the manner and amount to be spent on each Fund, and 
whether to organize new investment companies. 

   One-half of the distribution expenses of a marketing and promotional 
nature is allocated among the Funds based upon relative net assets. The 
remaining one-half of those expenses is allocated among the Funds based upon 
each Fund's sales for the preceding 24 months relative to the total sales of 
the Funds as a Group, provided, however, that no Fund's aggregate quarterly 
rate of contribution for distribution expenses of a marketing and promotional 
nature shall exceed 125% of average distribution expense rate for the Group, 
and that no Fund shall incur annual distribution expenses in excess of .02 of 
1% of its average month-end net assets. During the fiscal year ended November 
30, 1996, the Fund paid approximately $30,000 of the group's distribution and 
marketing expenses, or approximately .02 of 1% of its average month-end 
assets. 

   Investment Advisory Services. Vanguard provides investment advisory 
services to Vanguard Money Market Reserves, Vanguard Bond Index Fund, 
Vanguard REIT Index Portfolio, Vanguard Index Trust, Vanguard Balanced Index 
Fund, Vanguard International Equity Index Fund, Vanguard Municipal Bond Fund, 
several portfolios of Vanguard Fixed Income Securities Fund, Vanguard Admiral 
Funds, Vanguard Institutional Index Fund, several Portfolios of Vanguard 
Variable Insurance Fund, Vanguard California Tax-Free Fund, Vanguard New York 
Insured Tax-Free Fund, Vanguard Pennsylvania Tax-Free Fund, Vanguard Ohio 
Tax-Free Fund, Vanguard Florida Insured Tax-Free Fund, Vanguard New Jersey 
Tax-Free Fund, Vanguard Tax-Managed Fund, Aggressive Growth Portfolio of 
Vanguard Horizon Fund, Total International Portfolio of Vanguard STAR Fund, a 
portion of Vanguard/Windsor II and a portion of Vanguard/Morgan Growth Fund, 
as well as several indexed separate accounts. These services are provided on 
an at-cost basis from a money management staff employed directly by Vanguard. 
The compensation and other expenses of this staff are paid by the Funds 
utilizing these services. 


B-4
<PAGE>

                            DIRECTORS AND OFFICERS 

   The Officers of the Fund manage its day-to-day operations and are 
responsible to the Fund's Board of Directors. The Directors set broad 
policies for the Fund and choose its Officers. The following is a list of 
Directors and Officers of the Fund and a statement of their present positions 
and principal occupations during the past five years. The mailing address of 
the Fund's Directors and Officers is Post Office Box 876, Valley Forge, PA 
19482. 


JOHN C. BOGLE, Chairman and Director* 
 Chairman and Director of The Vanguard Group, Inc., and each of the 
 investment companies in The Vanguard Group; Director of The Mead 
 Corporation, General Accident Insurance and Chris-Craft Industries, Inc. 


JOHN J. BRENNAN, President, Chief Executive Officer & Director* 
 President, Chief Executive Officer and Director of The Vanguard Group, Inc. 
 and each of the investment companies in The Vanguard Group. 


ROBERT E. CAWTHORN, Director 
 Chairman Emeritus and Director of Rhone-Poulenc Rorer, Inc.; Director of Sun 
 Company, Inc. and Westinghouse Electric Corporation. 


BARBARA BARNES HAUPTFUHRER, Director 
 Director of The Great Atlantic and Pacific Tea Company, Raytheon Company, 
 Knight-Ridder, Inc., and Massachusetts Mutual Life Insurance Co. and Trustee 
 Emerita of Wellesley College. 

BRUCE K. MACLAURY, Director 
 President Emeritus of The Brookings Institution; Director of American 
 Express Bank, Ltd., The St. Paul Companies, Inc., and National Steel 
 Corporation. 

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


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

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

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


J. LAWRENCE WILSON, Director 
 Chairman and Chief Executive Officer of Rohm & Haas Company; Director of 
 Cummins Energy Company; and Trustee of Vanderbilt University. 

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

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

KAREN E. WEST, Controller* 
 Principal of The Vanguard Group, Inc.; Controller of each of the investment 
 companies in The Vanguard Group.
 
 ------ 
 * Mr. Bogle and the Officers of the Fund are "interested persons" as defined 
   in the Investment Company Act of 1940. 


                                                                             B-5
<PAGE>

REMUNERATION OF DIRECTORS AND OFFICERS 

   
   The Fund pays each Director who is not also an Officer an annual fee plus 
travel and other expenses incurred in attending Board meetings. The Fund's 
Officers and employees are paid by Vanguard which, in turn, is reimbursed by 
the Fund, and each other Fund in the Group, for its proportionate share of 
Officers' and employees' salaries and retirement benefits. During the fiscal 
year ended November 30, 1996 the Fund paid approximately $1,000 in Directors 
fees and expenses to its "non interested" directors. The Fund's proportionate 
share of remuneration paid by Vanguard (and reimbursed by the Fund) during 
the fiscal year was $5,192. 
    
   Directors who are not Officers are paid an annual fee upon retirement 
equal to $1,000 for each year of service on the Board, up to a maximum of 
$15,000. This fee is paid for a period of ten years or until the death of a 
retired Director, and each Vanguard Fund contributes a proportionate amount 
of this fee based on its relative net assets. Under its Retirement Plan, 
Vanguard contributes annually an amount equal to 10% of each Officer's annual 
compensation plus 5.7% of that part of the eligible Officer's compensation 
during the year, if any, that exceeds the Social Security Taxable Wage Base 
then in effect. Under its Thrift Plan, all eligible Officers are permitted to 
make pre-tax contributions in an amount equal to 4% of total compensation 
which are matched by Vanguard on a 100% basis. The Fund's proportionate share 
of retirement contributions made by Vanguard under its retirement and thrift 
plans on behalf of all eligible Officers of the Fund as a group during the 
1996 fiscal year was approximately $1,500. 

   The following table provides detailed information with respect to the 
amounts paid or accrued for the Directors for the fiscal year ended November 
30, 1996. 

                     VANGUARD CONVERTIBLE SECURITIES FUND 
                              COMPENSATION TABLE 

<TABLE>
<CAPTION>
                                 Aggregate      Pension or Retirement      Estimated         Total Compensation 
                                Compensation     Benefits Accrued As    Annual Benefits   From All Vanguard Funds 
Names of Directors               From Fund      Part of Fund Expenses   Upon Retirement     Paid to Directors(2) 
 ---------------------------   --------------   ---------------------    ---------------   ----------------------- 
<S>                            <C>              <C>                     <C>                <C>
John C. Bogle(1)  ..........         --                   --                     --                    -- 
John J. Brennan(1)  ........         --                   --                     --                    -- 
Barbara Barnes Hauptfuhrer          $65                  $10                $15,000               $65,000 
Robert E. Cawthorn  ........        $65                  $ 8                $13,000               $65,000 
Bruce K. MacLaury  .........        $70                  $10                $12,000               $60,000 
Burton G. Malkiel  .........        $65                  $ 7                $15,000               $65,000 
Alfred M. Rankin, Jr.  .....        $65                  $ 5                $15,000               $65,000 
John C. Sawhill  ...........        $65                  $ 6                $15,000               $65,000 
James O. Welch, Jr.  .......        $65                  $ 8                $15,000               $65,000 
J. Lawrence Wilson  ........        $65                  $ 6                $15,000               $65,000 

</TABLE>

(1) As "Interested Directors," Messrs. Bogle and Brennan receive no 
    compensation for their service as Directors. 
(2) The amounts reported in this column reflect the total compensation paid 
    to each Director for their service as Director or Trustee of 34 Vanguard 
    Funds (33 in the case of Mr. Malkiel; 27 in the case of Mr. MacLaury). 


B-6
<PAGE>

                         INVESTMENT ADVISORY SERVICES 


   The Fund employs Oaktree Capital Management, LLC (the "Adviser") under an 
investment advisory agreement dated November 1, 1996 to manage the investment 
and reinvestment of the assets of the Fund and to continuously review, 
supervise and administer the Fund's investment program. The Adviser 
discharges its responsibilities subject to the control of the Officers and 
Directors of the Fund. 


   The Fund pays the Adviser an advisory fee at the end of each fiscal 
quarter, calculated by applying a quarterly rate, based on the following 
annual percentage rates, to the Fund's average month-end net assets for the 
quarter (the "Basic Fee"): 

Net Assets                                                              Rate 
- ------------------                                                    -------- 
First $100 million ................................................    0.425% 
Next $100 million .................................................    0.400% 
Next $100 million .................................................    0.375% 
Next $100 million .................................................    0.350% 
Over $400 million .................................................    0.325% 

   It is not intended that the funding under this contract will exceed $500 
million. 

   Beginning November 30, 1997, the Basic Fee payment to the Adviser may be 
increased or decreased by a Performance Fee Adjustment (the "Adjustment"). 
The Adjustment shall be a percentage of the Basic Fee and shall change 
proportionately with the investment performance of the Fund relative to the 
investment performance of the First Boston Convertible Securities Index (the 
"Index"). The following table sets forth the Adjustment of the Basic Fee 
payable by the Fund to the Adviser under the investment advisory agreement.
 

     
     Cumulative Performance of
      the Fund vs. the Index                    Performance Fee Adjustment 
     for the Relevant Period                   as a Percentage of Basic Fee 
 ---------------------------------------      -------------------------------- 
- -100% of Performance Factor or more                        -50% 
- -1% to -99% of Performance Factor                        0 to -50% 
 0                                                           0 
+1% to +99% Performance Factor                           0 to +50% 
+100% of Performance Factor or more                        +50% 

   The Adjustment will be calculated as follows, using data from the table 
below: 

   To calculate the Adjustment for a given quarter, (1) for the Relevant 
Period for that quarter as set forth in the table below (the "Relevant 
Period"), the difference between the investment performance of the Fund and 
the investment performance of the Index (the "Performance Differential") will 
be calculated, (2) the Performance Differential will be compared to the 
Performance Factor specified by the table for that period to determine the 
extent to which an Adjustment is in order, and (3) the Adjustment will be the 
appropriate percentage of the Basic Fee* for an average quarter in that 
Relevant Period determined from the table above.
 
- ------ 
* For purposes of this calculation, the relevant Basic Fee is calculated by 
  applying the quarterly rate against average assets over which performance 
  is measured. 

                                                                             B-7
<PAGE>

                                                                 Performance 
Quarter Ending                  Relevant Period                 Factor (b.p.) 
 ---------------                ----------------                 ------------- 
Before 11/30/97                                  --no adjustment-- 
11/30/97                       12/1/96-11/30/97                       67 
2/28/98                        12/1/96-2/28/98                        83 
5/31/98                        12/1/96-5/31/98                       100 
8/31/98                        12/1/96-8/31/98                       117 
11/30/98                       12/1/96-11/30/98                      133 
2/28/99                        12/1/96-2/28/99                       150 
5/31/99                        12/1/96-5/31/99                       167 
8/31/99                        12/1/95-8/31/99                       183 
11/30/99                       12/1/96-11/30/99                      200 
After 11/30/99                 prior 36 months                       200 

   The investment performance of the Fund for such period, expressed as a 
percentage of the net asset value per share of the Fund at the beginning of 
such period, shall be the sum of: (i) the change in the net asset value per 
share of the Fund during such period; (ii) the value of the cash 
distributions per share of the Fund accumulated to the end of such period; 
and (iii) the value of capital gains taxes per share paid or payable by the 
Fund on undistributed realized long-term capital gains accumulated to the end 
of such period. For this purpose, the value of distributions per share of 
realized capital gains, of dividends per share paid from investment income 
and of capital gains taxes per share paid or payable on undistributed 
realized long-term capital gains shall be treated as reinvested in shares of 
the Fund at the net asset value per share in effect at the close of business 
on the record date for the payment of such distributions and dividends and 
the date on which provision is made for such taxes, after giving effect to 
such distributions, dividends and taxes. 

   The "investment record" of the Index for the period, expressed as a 
percentage of the Index level at the beginning of the period, shall be the 
sum of (i) the change in the level of the Index during the period and (ii) 
the value, computed consistently with the Index, of cash distributions having 
an ex-dividend date occurring within the period made by companies whose 
securities comprise the Index. 


   During the fiscal years ended November 30, 1994, 1995, and 1996, the Fund 
paid investment advisory fees of approximately $749,000, $674,000, and 
$578,000 respectively. 


   The agreement will continue until October 31, 1998 and will be renewable 
thereafter for successive one- year periods, only if each renewal is 
specifically approved by a vote of the Fund's Board of Directors, including 
the affirmative votes of a majority of the Directors who are not parties to 
the contract or "interested persons" (as defined in the Investment Company 
Act of 1940) of any such party, cast in person at a meeting called for the 
purpose of considering such approval. In addition, the question of 
continuance of the agreement may be presented to the shareholders of the 
Fund; in such event, continuation must be approved by the affirmative vote of 
a majority of the outstanding voting securities of the Fund. The agreement is 
automatically terminated if assigned, and may be terminated without penalty 
at any time (1) either by vote of the Board of Directors of the Fund or by 
vote of its outstanding voting securities on 60 days' written notice to the 
Adviser, or (2) by the Adviser upon 60 days' written notice to the Fund. 

   The Fund's Board of Directors may, without the approval of shareholders, 
provide for: 

       A. The employment of a new investment adviser pursuant to the terms of 
   a new advisory agreement, either as a replacement for an existing adviser 
   or as an additional adviser; 

B-8
<PAGE>

       B. A change in the terms of an advisory agreement; and 

       C. The continued employment of an existing adviser, on the same 
   advisory contract terms, where a contract has been assigned because of a 
   change in control of the adviser. 

   Any such change will only be made upon not less than 30 days' prior 
written notice to shareholders, which shall include the information 
concerning the adviser that would have normally been included in a proxy 
statement. 

   Oaktree Capital Management, LLC specializes in selected niche investment 
markets. The founders of Oaktree formed the company in April of 1995 after 
having managed funds in the convertible securities, distressed debt, and high 
yield bond areas of Trust Company of the West (TCW) since 1985. 


   Larry W. Keele, Principal and one of the five founders of Oaktree, serves 
as Portfolio Manager of the Fund. Mr. Keele is supported by research and 
other investment services provided by the professional staff of Oaktree. As 
of November 30, 1996, Oaktree managed approximately $7.3 billion. 


                            PORTFOLIO TRANSACTIONS 

   The investment advisory agreement authorizes the Adviser (with the 
approval of the Fund's Board of Directors) to select the brokers or dealers 
that will execute the purchases and sales of portfolio securities for the 
Fund and directs the Adviser to use its best efforts to obtain the best 
available price and most favorable execution as to all transactions for the 
Fund. The Adviser has undertaken to execute each investment transaction at a 
price and commission which provides the most favorable total cost or proceeds 
reasonably obtainable under the circumstances. 


   In placing portfolio transactions, the Adviser will use its best judgment 
to choose the broker most capable of providing the brokerage services 
necessary to obtain best available price and most favorable execution. The 
full range and quality of brokerage services available will be considered in 
making these determinations. In those instances where it is reasonably 
determined that more than one broker can offer the brokerage services needed 
to obtain the best available price and most favorable execution, 
consideration may be given to those brokers which supply investment research 
and statistical information and provide other services in addition to 
execution services to the Fund and/or the Adviser. The Adviser considers such 
information useful in the performance of its obligations under the agreement, 
but is unable to determine the amount by which such services may reduce its 
expenses. 


   The investment advisory agreement also incorporates the concepts of 
Section 28(e) of the Securities Exchange Act of 1934 by providing that, 
subject to the approval of the Fund's Board of Directors, the Adviser may 
cause the Fund to pay a broker-dealer which furnishes brokerage and research 
services a higher commission than that which might be charged by another 
broker-dealer for effecting the same transaction; provided that such 
commission is deemed reasonable in terms of either that particular 
transaction or the overall responsibilities of the Adviser to the Fund. 

   Currently, it is the Fund's policy that the Adviser may at times pay 
higher commissions in recognition of brokerage services felt necessary for 
the achievement of better execution of certain securities transactions that 
otherwise might not be available. The Adviser will only pay such higher 
commissions if it believes this to be in the best interest of the Fund. Some 
brokers or dealers who may receive such higher commissions in recognition of 
brokerage services related to execution of securities transactions are also 
providers of research information to the Adviser and/or the Fund. However, 
the Adviser has informed the Fund that it will not pay higher commission 
rates specifically for the purpose of obtaining research services. 

                                                                             B-9
<PAGE>

   Since the Fund does not market its shares through intermediary brokers or 
dealers, it is not the Fund's practice to allocate brokerage or principal 
business on the basis of sales of its shares which may be through such firms. 
However, the Fund may place portfolio orders with qualified broker-dealers 
who recommend the Fund to other clients, or who act as agent in the purchase 
of the Fund's shares for their clients, and may, when a number of brokers and 
dealers can provide comparable best price and execution on a particular 
transaction, consider the sale of the Fund shares by a broker or dealer in 
selecting among qualified broker-dealers. 


   Some securities considered for investment by the Fund may also be 
appropriate for other clients served by the Adviser. If purchase or sale of 
securities consistent with the investment policies of the Fund and one or 
more of these other clients serviced by the Adviser are considered at or 
about the same time, transactions in such securities will be allocated among 
the Fund and such other clients in a manner deemed equitable by the Adviser. 
During the fiscal years ended November 30, 1994, 1995 and 1996 the Fund paid 
$58,489, $38,822, and $111,718 in brokerage commissions. 


                             GENERAL INFORMATION 
                   DESCRIPTION OF SHARES AND VOTING RIGHTS 

   The Fund is a diversified open-ended investment company established under 
Maryland law. The Fund's Amended and Restated Articles of Incorporation dated 
April 8, 1986 permit the Directors to issue 1,000,000,000 shares of common 
stock, with a $.001 par value. The Board of Directors has the power to 
designate one or more classes ("Portfolios") of shares of common stock and to 
classify or reclassify any unissued shares with respect to such Portfolios. 
Currently the Fund is offering shares of one portfolio. 


   The shares of the Fund are fully paid and non-assessable, and have no 
preference as to conversion, exchange, dividends, retirement or other 
features. The shares have no pre-emptive rights. The shares have 
non-cumulative voting rights, which means that the holders of more than 50% 
of the shares voting for the election of Directors can elect 100% of the 
Directors if they choose to do so. A shareholder is entitled to one vote for 
each full share held (and a fractional vote for each fractional share held), 
then standing in his name on the books of the Fund. On any matter submitted 
to a vote of shareholders, all shares of the Fund then issued and outstanding 
and entitled to vote, irrespective of the class, shall be voted in the 
aggregate and not by class except (i) when required by the Investment Company 
Act of 1940, shares shall be voted by individual class, and (ii) when the 
matter does not affect any interest of a particular class, then only 
shareholders of the affected class or classes shall be entitled to vote 
thereon. 


                            YIELD AND TOTAL RETURN 


   The yield of the Fund for the 30-day period ended November 30, 1996 was 
+2.85%. 

   The average annual total return of the Fund for the one-, five-, and 
ten-year periods ended November 30, 1996 was +14.88%, +13.05% and +9.73%, 
respectively. The average annual total return of the Fund for the period 
since its inception on June 17, 1986 was +9.27%. 


                             COMPARATIVE INDEXES 

   Vanguard may use reprinted material discussing The Vanguard Group, Inc. or 
any of the member funds of the Vanguard Group of Investment Companies. 

B-10
<PAGE>

   Each of the investment company members of the Vanguard Group, including 
Vanguard Convertible Securities Fund, may, from time to time, use one or more 
of the following unmanaged indices for comparative performance purposes. 

Standard and Poor's 500 Composite Stock Price Index--is a well diversified 
list of 500 companies representing the U.S. Stock Market. 


Wilshire 5000 Equity Index--consists of more than 7,000 common equity 
securities, covering all stocks in the U.S. for which daily pricing is 
available. 


Wilshire 4500 Equity Index--consists of all stocks in the Wilshire 5000 
except for the 500 stocks in the Standard and Poor's 500 Index. 


Morgan Stanley Capital International EAFE Index--is an arithmetic, market 
value-weighted average of the performance of over 900 securities listed on 
the stock exchanges of countries in Europe, Australasia and the Far East. 


Goldman Sachs 100 Convertible Bond Index--currently includes 71 bonds and 29 
preferreds. The original list of names was generated by screening for 
convertible issues of $100 million or greater in market capitalization. The 
index is priced monthly. 

Salomon Brothers GNMA Index--includes pools of mortgages originated by 
private lenders and guaranteed by the mortgage pools of the Government 
National Mortgage Association. 

Salomon Brothers High-Grade Corporate Bond Index--consists of publicly 
issued, non-convertible corporate bonds rated Aa or Aaa. It is a 
value-weighted, total return index, including approximately 800 issues with 
maturities of 12 years or greater. 

The Lehman Aggregate Bond Index is composed of the Lehman Brothers 
Government/Corporate Bond Index and the Lehman Brothers Mortgage-Backed 
Securities Index and includes treasury issues, agency issues, corporate bond 
issues and mortgage-backed securities. All securities are rated investment 
grade or higher by Moody's Investors Service, Standard & Poor's Corporation, 
or Fitch Investor's Service, in that order. All issues have at least one year 
to maturity and an outstanding par value of at least $100 million. 


Lehman Long-Term Treasury Bond Index--is composed of all bonds covered by the 
Shearson Lehman Hutton Treasury Bond Index with maturities of 10 years or 
greater. 

Merrill Lynch Corporate & Government Bond Index--consist of over 4,500 U.S. 
Treasury, agency and investment grade corporate bonds. 


Lehman Corporate (BAA) Bond Index--all publicly offered fixed-rate, 
nonconvertible domestic corporate bonds rated Baa by Moody's, with a maturity 
longer than 1 year and with more than $25 million outstanding. This index 
includes over 1,000 issues. 

Lehman Brothers Long-term Corporate Bond Index--is a subset of the Lehman 
Corporate Bond Index covering all corporate, publicly issued, fixed-rate, 
nonconvertible U.S. debt issues rated at least Baa, with at least $50 million 
principal outstanding and maturity greater than 10 years. 


Bond Buyer Municipal Bond Index--is a yield index on current-coupon high 
grade general-obligation municipal bonds. 


                                                                            B-11
<PAGE>

Standard & Poor's Preferred Index--is a yield index based upon the average 
yield of four high grade, noncallable preferred stock issues. 

NASDAQ Industrial Index--is composed of more than 3,000 industrial issues. It 
is a value-weighted index calculated on price change only and does not 
include income. 

Composite Index--70% Standard & Poor's 500 Index and 30% NASDAQ Industrial 
Index. 


Composite Index--65% Standard & Poor's 500 Index and 35% Lehman Long-Term 
Corporate AA or Better Bond Index. 


Composite Index--65% Lehman Long-Term Corporate AA or Better Bond Index and a 
35% weighting in a blended equity composite (75% Standard & Poor's/BARRA 
Value Index and 25% Standard & Poor's Utilities Index). 

Lehman Long-Term Corporate AA or Better Bond Index--consists of all publicly 
issued, fixed rate, nonconvertible investment grade, dollar-denominated, SEC 
registered corporate debt rated AA or AAA. 

Lehman Brothers Aggregate Bond Index--is a market weighted index that 
contains over 4,000 individually priced U.S. Treasury, agency, corporate, and 
mortgage pass-through securities corporate rated Baa--or better. The Index 
has a market value of approximately $4 trillion. 

Lehman Brothers Mutual Fund Short (1-5) Government/Corporate Index--is a 
market weighted index that contains individually priced U.S. Treasury, 
agency, and corporate investment grade bonds rated BBB--or better with 
maturities between 1 and 5 years. The index has a market value of 
approximately $1.4 trillion. 

Lehman Brothers Mutual Fund Intermediate (5-10) Government/Corporate 
Index--is a market weighted index that contains individually priced U.S. 
Treasury, agency, and corporate securities rated BBB--or better with 
maturities between 5 and 10 years. The index has a market value of 
approximately $600 billion. 

Lehman Brothers Mutual Fund Long (10+) Government/Corporate Index--is a 
market weighted index that contains individually priced U.S. Treasury, 
agency, and corporate securities rated BBB--or better with maturities of ten 
or more years. The index has a market value of approximately $800 billion. 

Lehman Brothers Mutual Fund Short (1-5) Investment Grade Debt Index--is a 
market weighted index that contains all investment grade corporate debt 
securities with maturities of one to five years. The index has a market value 
of approximately $175 billion. 

Lehman Brothers Mutual Fund Short (1-5) U.S. Treasury Index--is a market 
weighted index that contains all U.S. Treasury securities with maturities of 
one to five years. The index has a market value of approximately $1.1 
trillion. 

Lehman Brothers Mutual Fund Short (1-5) U.S. Government Index--is a market 
weighted index that contains all U.S. Government agency and Treasury 
securities with maturities of one to five years. The index has a market value 
of approximately $1.3 trillion. 

Lehman Brothers Mutual Fund Intermediate (5-10) U.S. Treasury Index--is a 
market weighted index that contains all U.S. Treasury securities with 
maturities of five to ten years. The index has a market value of 
approximately $300 billion. 

B-12
<PAGE>

Lehman Brothers Mutual Fund Intermediate (5-10) Investment Grade Debt 
Index--is a market weighted index that contains all investment grade debt 
securities with maturities of five to ten years. The index has a market value 
of approximately $225 billion. 

Lipper Small Company Growth Fund Average--the average performance of small 
company growth funds as defined by Lipper Analytical Services, Inc. Lipper 
defines a small company growth fund as a fund that by prospectus or portfolio 
practice, limits its investments to companies on the basis of the size of the 
company. From time to time, Vanguard may advertise using the average 
performance and/or the average expense ratio of the small company growth 
funds. (This fund category was first established in 1982. For years prior to 
1982, the results of the Lipper Small Company Growth category were estimated 
using the returns of the Funds that constituted the Group at its inception). 

Lipper General Equity Fund Average--an industry benchmark of average general 
equity funds with similar investment objectives and policies, as measured by 
Lipper Analytical Services, Inc. 

Lipper Fixed Income Fund Average--an industry benchmark of average fixed 
income funds with similar investment objectives and policies, as measured by 
Lipper Analytical Services, Inc. 


Russell 3000 Index--consists of approximately the 3,000 largest stocks of 
U.S.-domiciled companies commonly traded on the New York and American Stock 
Exchanges or the NASDAQ over-the-counter market, accounting for over 90% of 
the market value of publicly traded stocks in the U.S. 


Russell 2000 Stock Index--consists of the smallest 2,000 stocks within the 
Russell 3000; a widely used benchmark for small capitalization common stocks. 

Lipper Balanced Fund Average--an industry benchmark of average balanced funds 
with similar investment objectives and policies, as measured by Lipper 
Analytical Services, Inc. 

Lipper Non-Government Money Market Fund Average--an industry benchmark of 
average non-government money market funds with similar investment objectives 
and policies, as measured by Lipper Analytical Services, Inc. 

Lipper Government Money Market Fund Average--an industry benchmark of average 
government money market funds with similar investment objectives and 
policies, as measured by Lipper Analytical Services, Inc. 

First Boston Convertible Securities Index--Established as a performance 
benchmark in 1982, the Index is valued monthly and generally includes 250 to 
300 issues of convertible securities rated B- or better by Standard & Poor's, 
and a predominant proportion of the market capitalization of the total value 
of all convertible securities. 

                             FINANCIAL STATEMENTS 


   The Fund's Financial Statements for the year ended November 30, 1996, 
including the financial highlights for each of the five fiscal years in the 
period ended November 30, 1996, appearing in the Fund's 1996 Annual Report to 
Shareholders, and the report thereon of Price Waterhouse LLP, independent 
accountants, also appearing therein, are incorporated by reference in this 
Statement of Additional Information. The Fund's 1996 Annual Report to 
Shareholders is enclosed with this Statement of Additional Information. 


                                                                            B-13
<PAGE>

               APPENDIX--DESCRIPTION OF SECURITIES AND RATINGS 

I. DESCRIPTION OF BOND RATINGS 


   Excerpts from Moody's Investors Service, Inc., ("Moody's") description of 
its four highest bond ratings: AAA--judged to be the best quality. They carry 
the smallest degree of investment risk; AA--judged to be of high quality by 
all standards. Together with the Aaa group they comprise what are generally 
known as high grade bonds; A--possess many favorable investment attributes 
and are to be considered as "upper medium grade obligations"; BAA--considered 
as medium grade obligations, i.e., they are neither highly protected nor 
poorly secured. Interest payments and principal security appear adequate for 
the present but certain protective elements may be lacking or may be 
characteristically unreliable over any great length of time. BA--judged to 
have speculative elements; their future cannot be considered as well assured; 
B--generally lack characteristics of the desirable investment; CAA--are of 
poor standing. Such issues may be in default or there may be present elements 
of danger with respect to principal or interest; CA--speculative in a high 
degree; often in default; C--lowest rated class of bonds; regarded as having 
extremely poor prospects. 


   Moody's also supplies numerical indicators 1, 2 and 3 to rating 
categories. The modifier 1 indicates that the security is in the higher end 
of its rating category; the modifier 2 indicates a mid-range ranking; and 3 
indicates a ranking toward the lower end of the category. 


   Excerpts from Standard & Poor's Corporation ("S&P") description of its 
five highest bond ratings: AAA-- highest grade obligations. Capacity to pay 
interest and repay principal is extremely strong; AA--also qualify as high 
grade obligations. A very strong capacity to pay interest and repay principal 
and differs from AAA issues only in small degree; A--regarded as upper medium 
grade. They have a strong capacity to pay interest and repay principal 
although they are somewhat susceptible to the adverse effects of changes in 
circumstances and economic conditions than debt in higher rated categories; 
BBB--regarded as having an adequate capacity to pay interest and repay 
principal. Whereas it normally exhibits adequate protection parameters, 
adverse economic conditions or changing circumstances are more likely to lead 
to a weakened capacity to pay interest and repay principal for debt in this 
category than in higher rated categories. This group is the lowest which 
qualifies for commercial bank investment. BB, B, CCC, CC--predominately 
speculative with respect to capacity to pay interest and repay principal in 
accordance with terms of the obligation; BB indicates the lowest degree of 
speculation and CC the highest. 

   S&P applies indicators "+," no character, and "-" to its rating 
categories. The indicators show relative standing within the major rating 
categories. 

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