VANGUARD MORGAN GROWTH FUND INC
497, 2000-04-26
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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                   FORM N-1A

                   REGISTRATION STATEMENT (NO. 2-29601) UNDER
                           THE SECURITIES ACT OF 1933

                           PRE-EFFECTIVE AMENDMENT NO.
                        POST-EFFECTIVE AMENDMENT NO. 53
                                      AND

        REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940

                                AMENDMENT NO. 54

                           VANGUARD MORGAN GROWTH FUND
        (EXACT NAME OF REGISTRANT AS SPECIFIED IN DECLARATION OF TRUST)

                     P.O. BOX 2600, VALLEY FORGE, PA 19482
                    (ADDRESS OF PRINCIPAL EXECUTIVE OFFICE)

                  REGISTRANT'S TELEPHONE NUMBER (610) 669-1000

                           R. GREGORY BARTON, ESQUIRE
                                  P.O. BOX 876
                             VALLEY FORGE, PA 19482

                 APPROXIMATE DATE OF PROPOSED PUBLIC OFFERING:
   AS SOON AS PRACTICABLE AFTER THIS REGISTRATION STATEMENT BECOMES EFFECTIVE.

                IT IS PROPOSED THAT THIS FILING BECOME EFFECTIVE:
            ON APRIL 21, 2000, PURSUANT TO PARAGRAPH (B) OF RULE 485.

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                                                               VANGUARD
                                                               MORGAN(TM) GROWTH
                                                               FUND

                                                               Prospectus
                                                               April 21, 2000


This prospectus contains
financial data for the
Fund through the
fiscal year ended
December 31, 1999.

                                                                    [A MEMBER OF
                                                        THE VANGUARD GROUP LOGO]

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VANGUARD(R) MORGAN(TM) GROWTH FUND
Prospectus
April 21, 2000
A Growth Stock Mutual Fund

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  CONTENTS
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  1 FUND PROFILE                             13 FINANCIAL HIGHLIGHTS

  3 ADDITIONAL INFORMATION                   15 INVESTING WITH VANGUARD

  3 A WORD ABOUT RISK                           15 Services and Account Features

  3 WHO SHOULD INVEST                           16 Types of Accounts

  4 PRIMARY INVESTMENT STRATEGIES               17 Buying Shares

  9 THE FUND AND VANGUARD                       19 Redeeming Shares

  9 INVESTMENT ADVISERS                         23 Transferring Registration

 10 DIVIDENDS, CAPITAL GAINS, AND TAXES         23 Fund and Account Updates

 12 SHARE PRICE                              GLOSSARY (inside back cover)

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 WHY READING THIS PROSPECTUS IS IMPORTANT

 This  prospectus  explains the  objective,  risks,  and  strategies of Vanguard
 Morgan  Growth Fund. To highlight  terms and concepts  important to mutual fund
 investors,  we have  provided  "Plain   Talk(R)"  explanations  along  the way.
 Reading the  prospectus  will help you to decide  whether the Fund is the right
 investment for you. We suggest that you keep it for future reference.
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NEITHER  THE  SECURITIES  AND  EXCHANGE  COMMISSION  NOR  ANY  STATE  SECURITIES
COMMISSION HAS APPROVED OR  DISAPPROVED  OF THESE  SECURITIES OR PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.

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                                                                               1
FUND PROFILE

The following profile summarizes key features of Vanguard Morgan Growth Fund.

INVESTMENT OBJECTIVE
The Fund seeks to provide long-term capital growth.

INVESTMENT STRATEGIES
The Fund  invests  primarily  in the stocks of large- and  medium-size  domestic
companies  whose revenues and/or earnings are expected to grow faster than those
of the average company in the market. The Fund also invests in stocks of smaller
companies with similar characteristics.

PRIMARY RISKS
THE FUND'S TOTAL RETURN,  LIKE STOCK PRICES  GENERALLY,  WILL FLUCTUATE WITHIN A
WIDE RANGE, SO AN INVESTOR COULD LOSE MONEY OVER SHORT OR EVEN LONG PERIODS. The
Fund is also subject to:
- -    Investment  style  risk,  which is the chance that  returns  from large- or
     mid-capitalization  growth  stocks  will trail  returns  from  other  asset
     classes or the overall stock market.
- -    Manager risk,  which is the chance that poor security  selection will cause
     the Fund to underperform other funds with similar investment objectives.

PERFORMANCE/RISK INFORMATION
The bar chart and table below  provide an indication of the risk of investing in
the Fund. The bar chart shows the Fund's  performance in each calendar year over
a ten-year  period.  The table shows how the Fund's average annual total returns
for one,  five,  and ten  calendar  years  compare  with those of a  broad-based
securities  market index. Keep in mind that the Fund's past performance does not
necessarily indicate how it will perform in the future.

              ----------------------------------------------------
                              ANNUAL TOTAL RETURNS
              ----------------------------------------------------
                              1990          -1.51%
                              1991          29.33%
                              1992           9.54%
                              1993           7.32%
                              1994          -1.67%
                              1995          35.98%
                              1996          23.30%
                              1997          30.81%
                              1998          22.26%
                              1999          34.10%
              ----------------------------------------------------

     During the period shown in the bar chart, the highest return for a calendar
quarter was 25.88% (quarter ended December 31, 1998) and the lowest return for a
quarter was -16.41% (quarter ended September 30, 1998).

      --------------------------------------------------------------------
        AVERAGE ANNUAL TOTAL RETURNS FOR YEARS ENDED DECEMBER 31, 1999
      --------------------------------------------------------------------
                                        1 YEAR     5 YEARS       10 YEARS
      --------------------------------------------------------------------
      Vanguard Morgan Growth Fund       34.10%      29.17%        18.14%
      S&P 500 Index                     21.04       28.56         18.21
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2

FEES AND EXPENSES
The following  table  describes the fees and expenses you may pay if you buy and
hold shares of the Fund. The expenses shown under Annual Fund Operating Expenses
are based upon those incurred in the fiscal year ended December 31,1999.

      SHAREHOLDER FEES (fees paid directly from your investment)
      Sales Charge (Load) Imposed on Purchases:                 None
      Sales Charge (Load) Imposed on Reinvested Dividends:      None
      Redemption Fee:                                           None
      Exchange Fee:                                             None

      ANNUAL FUND OPERATING EXPENSES (expenses deducted from the Fund's assets)
      Management Expenses:                                      0.40%
      12b-1 Distribution Fee:                                   None
      Other Expenses:                                           0.02%
       TOTAL ANNUAL FUND OPERATING EXPENSES:                    0.42%

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                                PLAIN TALK ABOUT
                                  FUND EXPENSES

 All mutual funds have operating  expenses.  These expenses,  which are deducted
 from a fund's gross income,  are expressed as a percentage of the net assets of
 the fund.  Vanguard  Morgan Growth Fund's expense ratio in fiscal year 1999 was
 0.42%,  or $4.20 per $1,000 of average net assets.  The average  growth  equity
 mutual fund had expenses in 1999 of 1.53%,  or $15.30 per $1,000 of average net
 assets (derived from data provided by Lipper Inc.,  which reports on the mutual
 fund industry).  Management expenses, which are one part of operating expenses,
 include  investment  advisory  fees  as well  as  other  costs  of  managing  a
 fund--such as account  maintenance,  reporting,  accounting,  legal,  and other
 administrative expenses.
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     The following example is intended to help you compare the cost of investing
in the Fund with the cost of investing in other mutual funds. It illustrates the
hypothetical  expenses  that you would incur over various  periods if you invest
$10,000 in the Fund.  This example assumes that the Fund provides a return of 5%
a year, and that operating  expenses  remain the same. The results apply whether
or not you redeem your investment at the end of each period.

               -------------------------------------------------
                 1 YEAR      3 YEARS    5 YEARS      10 YEARS
               -------------------------------------------------
                   $43        $135       $235         $530
               -------------------------------------------------

     THIS  EXAMPLE  SHOULD NOT BE  CONSIDERED  TO REPRESENT  ACTUAL  EXPENSES OR
PERFORMANCE  FROM THE PAST OR FOR THE  FUTURE.  ACTUAL  FUTURE  EXPENSES  MAY BE
HIGHER OR LOWER THAN THOSE SHOWN.

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                                                                               3

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                               PLAIN TALK ABOUT
                            THE COSTS OF INVESTING

 Costs are an important  consideration in choosing a mutual fund. That's because
 you, as a shareholder,  pay the costs of operating a fund, plus any transaction
 costs associated with the fund's buying and selling of securities.  These costs
 can erode a substantial  portion of the gross income or capital  appreciation a
 fund  achieves.  Even seemingly  small  differences in expenses can, over time,
 have a dramatic effect on a fund's performance.
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ADDITIONAL INFORMATION

DIVIDENDS AND CAPITAL GAINS         NET ASSETS AS OF DECEMBER 31, 1999
Distributed annually in December    $5.1 billion

INVESTMENT ADVISERS                 SUITABLE FOR IRAS
Vanguard Morgan Growth Fund uses    Yes
three advisers:
                                    MINIMUM INITIAL INVESTMENT
- - Wellington Management Company,    $3,000; $1,000 for IRAs and custodial
  LLP, Boston, Mass., since         accounts for minors
  inception
- - Franklin Portfolio Associates,    NEWSPAPER ABBREVIATION
  LLC, Boston, Mass., since 1990    Morg
- - The Vanguard Group Inc., Valley
  Forge, Pa., since 1993            VANGUARD FUND NUMBER
                                    026

INCEPTION DATE                      CUSIP NUMBER
December 31, 1968                   921928107

                                    TICKER SYMBOL
                                    VMRGX
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A WORD ABOUT RISK

This prospectus describes risks you would face as an investor in Vanguard Morgan
Growth  Fund.  It is  important  to keep  in  mind  one of the  main  axioms  of
investing: The higher the risk of losing money, the higher the potential reward.
The  reverse,  also,  is  generally  true:  The lower  the  risk,  the lower the
potential  reward.  As you consider an investment  in the Fund,  you should also
take into account your  personal  tolerance  for the daily  fluctuations  of the
stock and bond markets.
     Look for this [FLAG] symbol  throughout the prospectus.  It is used to mark
detailed  information  about  each  type of risk that you  would  confront  as a
shareholder of the Fund.
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WHO SHOULD INVEST

The Fund may be a suitable investment for you if:
- -    You wish to add a growth stock fund to your existing holdings,  which could
     include  other  stock  investments  as  well as  bond,  money  market,  and
     tax-exempt investments.
- -    You are seeking growth of capital over the long term--at least five years.
- -    You are not looking for current income.

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4

- -    You are seeking a fund that invests in growth companies representing a wide
     variety of industries.
- -    You characterize your investment temperament as "relatively aggressive."

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                                PLAIN TALK ABOUT
                             COSTS AND MARKET-TIMING

 Some  investors  try  to  profit  from   market-timing--switching   money  into
 investments  when they expect  prices to rise,  and taking  money out when they
 expect  the  market to fall.  As money is  shifted  in and out,  a fund  incurs
 expenses for buying and selling  securities.  These costs are borne by all fund
 shareholders,  including the long-term investors who do not generate the costs.
 Therefore,  the Fund  discourages  short-term  trading by, among other  things,
 limiting the number of exchanges that shareholders may make.
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     THE VANGUARD FUNDS DO NOT PERMIT MARKET-TIMING.  DO NOT INVEST IN THIS FUND
IF YOU ARE A MARKET-TIMER.

     The Fund has adopted the following  policies,  among others,  to discourage
short-term  trading:
- -    The Fund  reserves  the right to  reject  any  purchase  request--including
     exchanges from other  Vanguard  funds--that it regards as disruptive to the
     efficient  management  of the Fund.  A purchase  request  could be rejected
     because  of the  timing  of the  investment  or  because  of a  history  of
     excessive trading by the investor.
- -    There is a limit on the  number of times you can  exchange  into and out of
     the Fund (see "Redeeming Shares" in the INVESTING WITH VANGUARD section).
- -    The Fund reserves the right to stop offering shares at any time.

PRIMARY INVESTMENT STRATEGIES

This section explains the strategies that the investment advisers use in pursuit
of the Fund's objective,  long-term growth in capital.  It also explains how the
advisers implement these strategies. In addition, this section discusses several
important  risks--market risk, investment style risk, and manager risk--faced by
investors in the Fund.  The Fund's Board of Trustees  oversees the management of
the  Fund,  and  may  change  the  investment  strategies  in  the  interest  of
shareholders.

MARKET EXPOSURE
The Fund is a growth fund that invests  mainly in large- and  mid-capitalization
domestic common stocks.  The Fund also includes stocks of smaller companies that
may not have a long  history  of growth but are found  attractive  by one of the
Fund's  advisers.  Stocks  are  primarily  chosen on the basis of the  advisers'
expectations  that revenues and/or  earnings will grow faster than average.  The
Fund may also invest in securities that are convertible to common stocks.

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                                                                               5

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                                PLAIN TALK ABOUT
                    LARGE-CAP, MID-CAP, AND SMALL-CAP STOCKS

 Stocks  of  publicly  traded   companies--and  mutual  funds  that  hold  these
 stocks--can be classified by the companies'  market value,  or  capitalization.
 Market capitalization  changes over time, and there is no "official" definition
 of the boundaries of large-,  mid-, and small-cap  stocks.  Vanguard  generally
 defines  large-capitalization  (large-cap)  funds as those  holding  stocks  of
 companies whose  outstanding  shares have a market value exceeding $12 billion;
 mid-cap funds as those holding  stocks of companies with a market value between
 $1 billion and $12 billion;  and  small-cap  funds as those  typically  holding
 stocks  of  companies  with a market  value of less than $1  billion.  Vanguard
 periodically reassesses these classifications.
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[FLAG] THE FUND IS SUBJECT TO STOCK MARKET RISK,  WHICH IS THE CHANCE THAT STOCK
     PRICES OVERALL WILL DECLINE OVER SHORT OR EVEN LONG PERIODS.  STOCK MARKETS
     TEND TO MOVE IN  CYCLES,  WITH  PERIODS  OF RISING  PRICES  AND  PERIODS OF
     FALLING PRICES.

     To illustrate the volatility of stock prices, the following table shows the
best,  worst,  and average total returns for the U.S.  stock market over various
periods as measured by the Standard & Poor's 500 Index,  a widely used barometer
of market  activity.  (Total returns  consist of dividend  income plus change in
market  price.)  Note that the returns  shown do not include the costs of buying
and selling  stocks or other  expenses  that a real-world  investment  portfolio
would  incur.  Note,  also,  that the gap between best and worst tends to narrow
over the long term.

          ------------------------------------------------------
                 U.S. STOCK MARKET RETURNS (1926-1999)
          ------------------------------------------------------
                           1 YEAR  5 YEARS  10 YEARS   20 YEARS
          ------------------------------------------------------
          Best              54.2%   28.6%     19.9%      17.9%
          Worst            -43.1   -12.4      -0.9        3.1
          Average           13.2    11.0      11.1       11.1
          ------------------------------------------------------

     The table  covers all of the 1-, 5-,  10-,  and 20-year  periods  from 1926
through 1999. You can see, for example,  that while the average return on common
stocks for all of the 5-year periods was 11.0%,  returns for  individual  5-year
periods  ranged from a -12.4%  average  (from 1928 through  1932) to 28.6% (from
1995 through 1999).  These average  returns  reflect past  performance on common
stocks;  you should not regard  them as an  indication  of future  returns  from
either the stock market as a whole or this Fund in particular.
     Growth stocks, which are the Fund's primary  investments,  are likely to be
even more  volatile  in price  than the stock  market as a whole.  Historically,
growth  funds have tended to  outperform  in bull  markets and  underperform  in
declining  markets.  Of course,  there is no  guarantee  that this  pattern will
continue  in the  future.  The Fund also holds a  significant  number of mid-cap
stocks,  which tend to be more volatile than the large-cap  stocks that dominate
the S&P 500 Index.

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6

[FLAG] THE FUND IS SUBJECT TO  INVESTMENT  STYLE RISK,  WHICH IS THE CHANCE THAT
     RETURNS FROM LARGE-OR  MID-CAPITALIZATION  GROWTH STOCKS WILL TRAIL RETURNS
     FROM THE OVERALL STOCK MARKET.  AS A GROUP,  LARGE- AND  MID-CAPITALIZATION
     GROWTH  STOCKS  EACH  TEND  TO  GO  THROUGH  CYCLES  OF  DOING   BETTER--OR
     WORSE--THAN  COMMON  STOCKS IN GENERAL.  THESE  PERIODS  HAVE, IN THE PAST,
     LASTED FOR AS LONG AS SEVERAL YEARS.

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                                PLAIN TALK ABOUT
                          GROWTH FUNDS AND VALUE FUNDS

 Growth  investing  and value  investing  are two styles  employed by stock fund
 managers.   Growth  funds  generally  focus  on  companies   believed  to  have
 above-average  potential  for growth in revenue and  earnings.  Reflecting  the
 market's high  expectations for superior growth,  the prices of such stocks are
 typically above-average in relation to such measures as revenue, earnings, book
 value, and dividends.  Value funds generally emphasize stocks of companies from
 which the market  does not expect  strong  growth.  The prices of value  stocks
 typically are  below-average in comparison to such factors as earnings and book
 value, and these stocks typically pay above-average dividend yields. Growth and
 value stocks have, in the past, produced similar long-term returns, though each
 category has periods when it outperforms  the other.  In general,  growth funds
 appeal to  investors  who will  accept  more  volatility  in hopes of a greater
 increase in share price. Growth funds also may appeal to investors with taxable
 accounts  who want a higher  proportion  of returns  to come as  capital  gains
 (which may be taxed at lower  rates than  dividend  income).  Value  funds,  by
 contrast,  are  appropriate for investors who want some dividend income and the
 potential for capital gains, but are less tolerant of share-price fluctuations.
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SECURITY SELECTION
Vanguard  Morgan  Growth  Fund  has  three  investment  advisers,  each of which
independently chooses and maintains a portfolio of common stocks for the Fund.
     The three investment advisers employ active investment  management methods,
which  means that  securities  are bought and sold  according  to the  advisers'
judgments  about companies and their  financial  prospects,  and about the stock
market and the economy in general.
     Wellington  Management  Company,  LLP  (Wellington  Management),  which  is
currently  responsible  for about 42% of the  Fund's  assets,  uses  traditional
methods of stock  selection-research  and analysis-to identify companies that it
believes have above-average  growth prospects,  particularly those in industries
undergoing  change.  Research is focused on  companies  with a proven  record of
sales and earnings growth, profitability,  and cash flow generation.  Securities
are sold when an investment has achieved its intended purpose,  or because it is
no longer considered attractive.
     The other two advisers, Franklin Portfolio Associates, LLC and The Vanguard
Group (Vanguard),  employ a "quantitative"  investment approach. In other words,
they use computerized  models for portfolio  construction and stock selection to
outperform,  if possible, a specific market standard. For Vanguard Morgan Growth
Fund, this market  standard is the Growth Fund Stock Index,  which is made up of
the stocks held by the nation's 50 largest growth funds.

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                                                                               7

     Franklin  Portfolio  Associates'   investment  strategy  focuses  on  stock
selection and fund structure.  The stock selection process is driven by a series
of more than 40 computer  models that value a universe  of 3,500  stocks.  These
models cover a broad range of publicly  available  data and focus on four areas:
fundamental momentum (based on the trends of reported and forecasted  earnings),
relative value,  future cash flow, and economic  cycles.  The individual  models
rank each security in the universe.  Using these  rankings,  a separate  program
builds a fund  consistent  with the Growth Fund Stock  Index's  characteristics.
Franklin Portfolio Associates currently manages about 39% of the Fund's assets.
     Vanguard ranks a universe of approximately  2,000 stocks using a variety of
computer  models.  These  models  focus on  investment  characteristics  such as
earnings,  fundamental momentum, share price momentum,  relative value, and cash
flow. A separate  program then selects the stocks for the Fund,  consistent with
the  Growth  Fund Stock  Index's  characteristics,  from among the stocks  rated
highly by the investment  models.  Vanguard  currently  manages about 14% of the
Fund's assets.

     The balance of Vanguard  Morgan  Growth Fund's assets (about 5%) is held in
cash  reserves,  also managed by Vanguard,  which may invest in stock futures to
give the cash  reserves  the  performance  of common  stocks.  This  strategy is
intended to keep the Fund more fully  invested in common stocks while  retaining
cash on hand to meet liquidity needs.

     The Fund is generally managed without regard to tax ramifications.

[FLAG] THE FUND IS SUBJECT TO MANAGER RISK, WHICH IS THE CHANCE THAT ONE OR MORE
     OF THE FUND'S ADVISERS WILL DO A POOR JOB OF SELECTING STOCKS.

TURNOVER RATE
Although the Fund  generally  seeks to invest for the long term,  it retains the
right to sell  securities  regardless of how long the securities have been held.
The Fund's  average  turnover rate for the past five years has been about 74.2%.
(A turnover rate of 100% would occur, for example, if the Fund sold and replaced
securities valued at 100% of its net assets within a one-year period.)

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                               PLAIN TALK ABOUT
                                 TURNOVER RATE

 Before  investing in a mutual fund, you should review its turnover  rate.  This
 gives an  indication  of how  transaction  costs could affect the fund's future
 returns. In general,  the greater the volume of buying and selling by the fund,
 the greater the impact that brokerage  commissions and other  transaction costs
 will have on its  return.  Also,  funds  with high  turnover  rates may be more
 likely to generate  capital gains that must be distributed to  shareholders  as
 income subject to taxes. As of December 31, 1999, the average turnover rate for
 all growth stock funds was approximately 99%, according to Morningstar, Inc.
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OTHER INVESTMENT POLICIES AND RISKS
Besides  investing  in  common  stocks of  growth  companies,  the Fund may make
certain other kinds of investments to achieve its objective.
     Although  the  Fund  typically  does not make  significant  investments  in
securities of companies  based outside the United States,  the Fund reserves the
right to invest up to 20% of its assets in foreign securities.  These securities
may be traded in U.S. or foreign

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8

markets.  To the extent that it owns foreign stocks, the Fund is subject to: (1)
country  risk,  which  is the  chance  that  political  events  (such as a war),
financial problems (such as government  default),  or natural disasters (such as
an  earthquake)  will weaken a country's  economy and cause  investments in that
country to lose money, and (2) currency risk, which is the chance that Americans
investing  abroad  could lose  money  because of a rise in the value of the U.S.
dollar versus foreign currencies.
     The Fund may also invest, to a limited extent, in stock futures and options
contracts,  which  are  traditional  types of  derivatives.  Losses  (or  gains)
involving  futures can  sometimes be  substantial--in  part because a relatively
small  price  movement  in a futures  contract  may result in an  immediate  and
substantial  loss (or gain)  for a fund.  This  Fund  will not use  futures  for
speculative  purposes  or as  leveraged  investments  that  magnify the gains or
losses of an investment.  The Fund's obligation under futures contracts will not
exceed 20% of its total assets.
     The reasons for which the Fund will invest in futures and options are:
- -    To keep cash on hand to meet  shareholder  redemptions or other needs while
     simulating full investment in stocks.
- -    To reduce the Fund's  transaction costs or add value when these instruments
     are favorably priced.
     The Fund may temporarily  depart from its normal  investment  policies--for
instance,   by  investing   substantially  in  cash  reserves--in   response  to
extraordinary market, economic, political, or other conditions. In doing so, the
Fund may succeed in avoiding losses but otherwise fail to achieve its investment
objective.

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                               PLAIN TALK ABOUT
                                  DERIVATIVES

 A  derivative  is a financial  contract  whose value is based on (or  "derived"
 from) a traditional  security (such as a stock or a bond),  an asset (such as a
 commodity  like gold),  or a market  index  (such as the S&P 500  Index).  Some
 futures and options have been trading on regulated  exchanges for more than two
 decades.  These "traditional"  derivatives are standardized  contracts that can
 easily be bought and sold, and whose market values are determined and published
 daily. It is these  characteristics that differentiate futures and options from
 the  relatively  new  types  of  derivatives.  If used  for  speculation  or as
 leveraged investments, derivatives can carry considerable risks.
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THE FUND AND VANGUARD


The Fund is a member of The Vanguard  Group, a family of more than 35 investment
companies  with more than 100 funds holding assets worth more than $550 billion.
All of the  Vanguard  funds  share  in the  expenses  associated  with  business
operations, such as personnel, office space, equipment, and advertising.
     Vanguard  also  provides   marketing   services  to  the  funds.   Although
shareholders do not pay sales commissions or 12b-1  distribution fees, each fund
pays its allocated share of The Vanguard Group's marketing costs.


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                                                                               9

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                               PLAIN TALK ABOUT
                     VANGUARD'S UNIQUE CORPORATE STRUCTURE

 The Vanguard  Group is truly a MUTUAL mutual fund company.  It is owned jointly
 by the funds it  oversees  and thus  indirectly  by the  shareholders  in those
 funds. Most other mutual funds are operated by for-profit  management companies
 that may be owned by one person, by a group of individuals, or by investors who
 own the management company's stock. By contrast, Vanguard provides its services
 on an "at cost" basis,  and the funds' expense ratios reflect only these costs.
 No separate  management  company reaps profits or absorbs losses from operating
 the funds.
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INVESTMENT ADVISERS

The Fund  employs  three  investment  advisers.  Each manages its portion of the
Fund's assets subject to the control of the Trustees and officers of the Fund.
     WELLINGTON  MANAGEMENT  COMPANY,  LLP  (Wellington  Management),  75  State
Street, Boston, MA 02109, and its predecessors have provided investment advisory
services since 1928. The firm currently  manages more than $235 billion in stock
and bond portfolios, including 15 Vanguard funds.
     Wellington  Management's advisory fee is paid quarterly.  This fee is based
on certain annual  percentages  applied to the Fund's average  month-end  assets
managed by Wellington Management.  The advisory fee may be adjusted based on the
36-month cumulative total return performance of Wellington  Management's portion
of the Fund as compared to the cumulative  total return of the Growth Fund Stock
Index.

     FRANKLIN PORTFOLIO  ASSOCIATES,  LLC, Two International  Place,  Boston, MA
02110,  is a  professional  advisory  firm founded in 1982.  Franklin  Portfolio
Associates is a wholly  owned,  indirect  subsidiary of Mellon Bank,  and has no
affiliation with the  Franklin/Templeton  Group of Funds or Franklin  Resources,
Inc. Franklin Portfolio Associates currently manages approximately $21.4 billion
in assets.

     Franklin Portfolio Associates' advisory fee is paid quarterly.  This fee is
based on the average month-end assets managed by Franklin Portfolio  Associates.
The advisory fee may be adjusted based on the 36-month  cumulative  total return
performance of Franklin Portfolio Associates' portion of the Fund as compared to
the cumulative total return of the Growth Fund Stock Index.
     THE VANGUARD  GROUP,  (Vanguard)  P.O. Box 2600,  Valley  Forge,  PA 19482,
founded in 1975,  is a  wholly-owned  subsidiary  of the Vanguard  funds.  As of
December  31,  1999,  Vanguard  served as adviser  for about  $371.4  billion in
assets. The Fund receives advisory services from Vanguard on an at cost basis.
     The  Fund's  most  recent  Statement  of  Additional  Information  provides
complete details of how Wellington  Management and Franklin Portfolio Associates
are compensated.  For the year ended December 31, 1999, the aggregate investment
advisory fee represented an effective  annual basic rate of 0.11% of average net
assets of the Fund before an increase of less than 0.01% based on performance.
     The Fund has authorized the advisers to choose brokers or dealers to handle
the purchase and sale of securities  for the Fund, and to get the best available
price and most  favorable  execution  from  these  brokers  with  respect to all
transactions.
     In the  interest  of  obtaining  better  execution  of a  transaction,  the
advisers  may choose  brokers who charge  higher  commissions.  If more than one
broker can obtain the best  available  price and most  favorable  execution of a
transaction, then the advisers are

<PAGE>
10

authorized  to choose a broker who, in addition to  executing  the  transaction,
will provide  research  services to the advisers or the Fund. Also, the Fund may
direct the  advisers  to use a  particular  broker for certain  transactions  in
exchange for commission rebates or research services provided to the Fund.
     The Board of Trustees may, without prior approval from shareholders, change
the terms of an advisory agreement or hire a new investment adviser--either as a
replacement for an existing adviser or as an additional adviser. Any significant
change in the Fund's advisory  arrangements will be communicated to shareholders
in writing. In addition, as the Fund's sponsor and overall manager, The Vanguard
Group may provide investment advisory services to the Fund, on an at-cost basis,
at any time.

- --------------------------------------------------------------------------------
                                PLAIN TALK ABOUT
                               THE FUND'S ADVISERS

The individuals primarily responsible for Vanguard Morgan Growth Fund are:

ROBERT D. RANDS,  CFA, Senior Vice President of Wellington  Management  Company,
LLP; has worked in investment  management since 1966, with Wellington Management
since  1978;  adviser to the Fund since 1994;  B.A.,  Yale  University;  M.B.A.,
University of Pennsylvania.


JOHN J. NAGORNIAK, CFA, CEO of Franklin Portfolio Associates, LLC; has worked in
investment management since 1970, with Franklin Portfolio Associates since 1982;
adviser to the Fund since 1990;  B.A.,  Princeton  University;  M.S.,  The Sloan
School of Management, Massachusetts Institute of Technology.


GEORGE U.  SAUTER,  Managing  Director of Vanguard and head of  Vanguard's  Core
Management  Group;  has worked in  investment  management  since  1985:  primary
responsibility  for Vanguard's  stock indexing policy and strategy since joining
the company in 1987; A.B., Dartmouth College; M.B.A., University of Chicago.


JOHN S. CONE, CFA, President of Franklin Portfolio  Associates,  LLC; has worked
in investment  management with Franklin Portfolio Associates since 1982; adviser
to the Fund since 1990; B.A., Rice University; M.S., Perdue University.

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

DIVIDENDS, CAPITAL GAINS, AND TAXES

FUND DISTRIBUTIONS
The Fund  distributes to shareholders  virtually all of its net income (interest
and dividends,  less  expenses),  as well as any capital gains realized from the
sale of its holdings.  Distributions  generally occur in December.  In addition,
the Fund may occasionally be required to make  supplemental  dividend or capital
gains  distributions  at some  other  time  during  the  year.  You can  receive
distributions of income dividends or capital gains in cash, or you can have them
automatically reinvested in more shares of the Fund.

BASIC TAX POINTS
Vanguard will send you a statement  each year showing the tax status of all your
distributions.  In addition,  taxable investors should be aware of the following
basic tax points:
- -    Distributions are taxable to you for federal income tax purposes whether or
     not you reinvest these amounts in additional Fund shares.
- -    Distributions   declared  in  December--if  paid  to  you  by  the  end  of
     January--are  taxable  for  federal  income tax  purposes as if received in
     December.
- -    Any dividends and short-term  capital gains that you receive are taxable to
     you as ordinary income for federal income tax purposes.

<PAGE>

                                                                              11

- -    Any  distributions  of net  long-term  capital  gains are taxable to you as
     long-term capital gains for federal income tax purposes, no matter how long
     you've owned shares in the Fund.
- -    Capital gains  distributions  may vary  considerably from year to year as a
     result of the Fund's normal investment activities and cash flows.
- -    A sale or exchange of Fund shares is a taxable  event.  This means that you
     may have a capital gain to report as income, or a capital loss to report as
     a deduction, when you complete your federal income tax return.
- -    Dividend and capital gains  distributions that you receive, as well as your
     gains or losses from any sale or exchange of Fund shares, may be subject to
     state and local income taxes.

GENERAL INFORMATION
BACKUP  WITHHOLDING.   By  law,  Vanguard  must  withhold  31%  of  any  taxable
distributions  or redemptions from your account if you do not:
- -    provide us with your correct taxpayer identification number;
- -    certify that the taxpayer identification number is correct; and
- -    confirm that you are not subject to backup withholding.
Similarly,  Vanguard  must withhold from your account if the IRS instructs us to
do so.
FOREIGN  INVESTORS.  The Vanguard funds  generally do not offer their shares for
sale outside of the United States.  Foreign  investors should be aware that U.S.
withholding and estate taxes may apply to any investments in Vanguard funds.
INVALID  ADDRESSES.  If a dividend or capital gains distribution check mailed to
your address of record is returned as undeliverable, Vanguard will automatically
reinvest  all future  distributions  until you  provide us with a valid  mailing
address.
TAX CONSEQUENCES.  This prospectus provides general tax information only. If you
are investing through a tax-deferred retirement account, such as an IRA, special
tax rules apply. Please consult your tax adviser for detailed  information about
a fund's tax consequences for you.

- --------------------------------------------------------------------------------
                                PLAIN TALK ABOUT
                                  DISTRIBUTIONS

 As a  shareholder,  you are  entitled  to your share of the fund's  income from
 interest and  dividends,  and gains from the sale of  investments.  You receive
 such  earnings as either an income  dividend or a capital  gains  distribution.
 Income  dividends  come from both the  dividends  that the fund  earns from its
 holdings  and  the  interest  it  receives  from  its  money  market  and  bond
 investments.  Capital gains are realized whenever the fund sells securities for
 higher prices than it paid for them. These capital gains are either  short-term
 or long-term, depending on whether the fund held the securities for one year or
 less, or more than one year.
- --------------------------------------------------------------------------------

<PAGE>

12

- --------------------------------------------------------------------------------
                                PLAIN TALK ABOUT
                               "BUYING A DIVIDEND"

 Unless you are investing through a tax-deferred  retirement account (such as an
 IRA),  it is not to your  advantage to buy shares of a fund  shortly  before it
 makes a  distribution,  because  doing so can cost you money in taxes.  This is
 known as "buying a dividend."  For example:  on December 15, you invest $5,000,
 buying 250 shares for $20 each. If the fund pays a distribution of $1 per share
 on December 16, its share price would drop to $19 (not counting market change).
 You still have only $5,000 (250 shares x $19 = $4,750 in share value,  plus 250
 shares x $1 = $250 in distributions),  but you owe tax on the $250 distribution
 you  received--even  if you  reinvest  it in more  shares.  To  avoid "buying a
 dividend," check a fund's distribution schedule before you invest.
- --------------------------------------------------------------------------------

SHARE PRICE

The Fund's share price,  called its net asset value,  or NAV, is calculated each
business day after the close of regular  trading on the New York Stock  Exchange
(the NAV is not  calculated  on  holidays  or other  days when the  Exchange  is
closed).  Net asset  value per share is computed by adding up the total value of
the Fund's  investments  and other assets,  subtracting  any of its  liabilities
(debts), and then dividing by the number of Fund shares outstanding:

                                   TOTAL ASSETS - LIABILITIES
             NET ASSET VALUE  =  -------------------------------
                                  NUMBER OF SHARES OUTSTANDING

     Knowing the daily net asset value is useful to you as a shareholder because
it indicates the current value of your investment. The Fund's NAV, multiplied by
the  number of  shares  you own,  gives you the  dollar  amount  you would  have
received had you sold all of your shares back to the Fund that day.
     A NOTE ON PRICING:  The Fund's  investments  will be priced at their market
value when market  quotations are readily  available.  When these quotations are
not  readily  available,  investments  will  be  priced  at  their  fair  value,
calculated according to procedures adopted by the Fund's Board of Trustees.
     The Fund's  share price can be found  daily in the mutual fund  listings of
most major newspapers under the heading "Vanguard Funds".  Different  newspapers
use different abbreviations of the Fund's name, but the most common is MORG.

<PAGE>

                                                                              13

FINANCIAL HIGHLIGHTS

The following financial  highlights table is intended to help you understand the
Fund's financial  performance for the past five years,  and certain  information
reflects  financial  results for a single Fund share.  The total  returns in the
table  represent the rate that an investor would have earned or lost each period
on an investment in the Fund (assuming  reinvestment of all dividend and capital
gains  distributions).  This  information  has been derived  from the  financial
statements audited by PricewaterhouseCoopers LLP, independent accountants, whose
report--along  with the Fund's financial  statements--is  included in the Fund's
most recent annual report to  shareholders.  You may have the annual report sent
to you without charge by contacting Vanguard.

- --------------------------------------------------------------------------------
                                          VANGUARD MORGAN GROWTH FUND
                                            YEAR ENDED DECEMBER 31,
                         -------------------------------------------------------
                           1999        1998        1997        1996        1995
- --------------------------------------------------------------------------------
NET ASSET VALUE,
 BEGINNING OF YEAR       $19.72      $17.54      $15.63      $14.09      $11.36
- --------------------------------------------------------------------------------
INVESTMENT OPERATIONS
 Net Investment Income      .14         .18        .160         .14         .15
 Net Realized and
  Unrealized Gain (Loss)
  on Investments           6.29        3.61       4.435        3.07        3.89
                         -------------------------------------------------------
  Total from Investment
   Operations              6.43        3.79       4.595        3.21        4.04
                         -------------------------------------------------------
DISTRIBUTIONS
 Dividends from Net
  Investment Income        (.15)       (.18)      (.160)       (.14)       (.15)
 Distributions from
  Realized Capital Gains  (3.08)      (1.43)     (2.525)      (1.53)      (1.16)
                         -------------------------------------------------------
  Total Distributions     (3.23)      (1.61)     (2.685)      (1.67)      (1.31)
- --------------------------------------------------------------------------------
NET ASSET VALUE, END
 OF YEAR                 $22.92      $19.72      $17.54      $15.63      $14.09
================================================================================

TOTAL RETURN             34.10%      22.26%      30.81%      23.30%      35.98%
================================================================================

RATIOS/SUPPLEMENTAL DATA
 Net Assets, End of
  Year (Millions)        $5,066      $3,555      $2,795      $2,054      $1,471
 Ratio of Total
  Expenses to Average
  Net Assets              0.42%       0.44%       0.48%       0.51%       0.49%
 Ratio of Net
  Investment Income to
  Average Net Assets      0.71%       0.96%       0.93%       0.97%       1.10%
 Turnover Rate              65%         81%         76%         73%         76%
================================================================================
<PAGE>
14


Financial Highlights (continued)


- --------------------------------------------------------------------------------
                                PLAIN TALK ABOUT
                   HOW TO READ THE FINANCIAL HIGHLIGHTS TABLE

 The Fund began fiscal 1999 with a net asset value  (price) of $19.72 per share.
 During  the  year,  the Fund  earned  $0.14 per share  from  investment  income
 (interest  and  dividends)  and  $6.29  per  share  from  investments  that had
 appreciated in value or that were sold for higher prices than the Fund paid for
 them.
 Shareholders received $3.23 per share in the form of dividend and capital gains
 distributions.  A portion of each year's  distributions may come from the prior
 year's income or capital gains.
 The  earnings  ($6.43  per  share)  minus the  distributions  ($3.23 per share)
 resulted  in a share  price  of  $22.92  at the end of the  year.  This  was an
 increase of $3.20 per share (from $19.72 at the beginning of the year to $22.92
 at the end of the year). For a shareholder who reinvested the  distributions in
 the purchase of more shares,  the total return from the Fund was 34.10% for the
 year.
 As of December 31, 1999, the Fund had $5.1 billion in net assets. For the year,
 its  expense  ratio  was  0.42%  ($4.20  per  $1,000  of net  assets);  and net
 investment  income  amounted to 0.71% of its  average  net assets.  It sold and
 replaced securities valued at 65% of its net assets.
- --------------------------------------------------------------------------------

"Standard & Poor's(R),"  "S&P(R),"  "S&P  500(R),"  "Standard & Poor's 500," and
"500" are trademarks of The McGraw-Hill Companies, Inc.

<PAGE>

                                                                              15

- --------------------------------------------------------------------------------
 INVESTING WITH VANGUARD

 Are you looking for the most  convenient way to open or add money to a Vanguard
 account? Obtain instant access to fund information?  Establish an account for a
 minor child or for your retirement savings?
      Vanguard can help. Our goal is to make it easy and pleasant  for you to do
 business with us.
      The following sections of the prospectus briefly explain the many services
 we offer. Booklets providing detailed information are available on the services
 marked with a [BOOK]. Please call us to request copies.
- --------------------------------------------------------------------------------

SERVICES AND ACCOUNT FEATURES

Vanguard  offers many services that make it convenient to buy, sell, or exchange
shares, or to obtain fund or account information.
- --------------------------------------------------------------------------------

TELEPHONE REDEMPTIONS (SALES AND EXCHANGES)
Automatically set up for this Fund unless you notify us otherwise.
- --------------------------------------------------------------------------------

VANGUARD(R) DIRECT DEPOSIT SERVICE [BOOK]
Automatic  method  for  depositing  your  paycheck  or U.S.  government  payment
(including Social Security and government pension checks) into your account.
- --------------------------------------------------------------------------------
VANGUARD(R) AUTOMATIC EXCHANGE SERVICE [BOOK]
Automatic  method for  moving a fixed  amount of money  from one  Vanguard  fund
account to another.
- --------------------------------------------------------------------------------
VANGUARD FUND EXPRESS(R) [BOOK]
Electronic  method for buying or selling shares.  You can transfer money between
your  Vanguard  fund account and an account at your bank,  savings and loan,  or
credit union on a systematic schedule or whenever you wish.
- --------------------------------------------------------------------------------
VANGUARD DIVIDEND EXPRESS(TM) [BOOK]
Electronic method for transferring  dividend and/or capital gains  distributions
directly  from your  Vanguard  fund account to your bank,  savings and loan,  or
credit union account.
- --------------------------------------------------------------------------------
VANGUARD TELE-ACCOUNT(R) 1-800-662-6273 (ON-BOARD) [BOOK]
Toll-free  24-hour access to Vanguard fund and account  information--as  well as
some  transactions--by  using any touch-tone phone.  Tele-Account provides total
return,  share price, price change, and yield quotations for all Vanguard funds;
gives your account balances and history (e.g., last transaction, latest dividend
distribution);  and  allows  you to sell or  exchange  shares  to and from  most
Vanguard funds.
- --------------------------------------------------------------------------------
ACCESS VANGUARD(TM) www.vanguard.com [BOOK]
You can use your  personal  computer to perform  certain  transactions  for most
Vanguard  funds by accessing our website.  To establish  this service,  you must
register  through our website.  We will then mail you an account access password
that  allows  you  to  process  the  following   financial  and   administrative
transactions  online:
- -    Open a new account.*
- -    Buy, sell, or exchange shares of most funds.
- -    Change your name/address.

<PAGE>

16

- -    Add/change fund options (including dividend options, Vanguard Fund Express,
     bank instructions,  checkwriting, and Vanguard Automatic Exchange Service).
     (Some  restrictions may apply.) Please call our Client Services  Department
     for assistance.
*Only current Vanguard shareholders can open a new account online, by exchanging
 shares from other existing Vanguard accounts.
- --------------------------------------------------------------------------------
INVESTOR INFORMATION DEPARTMENT: 1-800-662-7447 (SHIP) TEXT TELEPHONE:
1-800-952-3335
Call  Vanguard for  information  on our funds,  fund  services,  and  retirement
accounts, and to request literature.
- --------------------------------------------------------------------------------
CLIENT SERVICES DEPARTMENT: 1-800-662-2739 (CREW) TEXT TELEPHONE: 1-800-749-7273
Call Vanguard for information on your account, account transactions, and account
statements.
- --------------------------------------------------------------------------------
SERVICES  FOR  CLIENTS  OF  VANGUARD'S  INSTITUTIONAL  DIVISION:  1-888-809-8102
Vanguard's  Institutional  Division offers a variety of specialized services for
large  institutional   investors,   including  the  ability  to  effect  account
transactions through private electronic networks and third-party recordkeepers.
- --------------------------------------------------------------------------------

TYPES OF ACCOUNTS
Individuals and institutions can establish a variety of accounts with Vanguard.
- --------------------------------------------------------------------------------
FOR ONE OR MORE PEOPLE
Open an account in the name of one (individual) or more (joint tenants) people.
- --------------------------------------------------------------------------------
FOR HOLDING PERSONAL TRUST ASSETS [BOOK]
Invest assets held in an existing personal trust.
- --------------------------------------------------------------------------------
FOR INDIVIDUAL RETIREMENT ACCOUNTS [BOOK]
Open a  traditional  IRA account or a Roth IRA  account.  Eligibility  and other
requirements  are  established  by federal law and  Vanguard  custodial  account
agreements. For more information, please call 1-800-662-7447 (SHIP).
- --------------------------------------------------------------------------------
FOR AN ORGANIZATION [BOOK]
Open an account as a corporation,  partnership,  endowment, foundation, or other
entity.
- --------------------------------------------------------------------------------
FOR THIRD-PARTY TRUSTEE RETIREMENT INVESTMENTS
Open an account as a retirement trust or plan based on an existing  corporate or
institutional  plan.  These  accounts  are  established  by the  trustee  of the
existing plan.
- --------------------------------------------------------------------------------
VANGUARD PROTOTYPE PLANS
Open a  variety  of  retirement  accounts  using  Vanguard  prototype  plans for
individuals,  sole proprietorships,  and small businesses. For more information,
please call 1-800-662-2003.
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
A NOTE ON INVESTING WITH VANGUARD THROUGH OTHER FIRMS
You may purchase or sell Fund shares through a financial  intermediary such as a
bank,  broker,  or investment  adviser.  If you invest with Vanguard  through an
intermediary,  please read that firm's program  materials  carefully to learn of
any  special  rules  that may apply.  For  example,  special  terms may apply to
additional service features, fees, or other policies.  Consult your intermediary
to determine when your order will be priced.
- --------------------------------------------------------------------------------

<PAGE>

                                                                              17

BUYING SHARES

You buy your shares at the Fund's next-determined net asset value after Vanguard
receives your request.  As long as your request is received  before the close of
trading on the New York Stock Exchange,  generally 4 p.m. Eastern time, you will
buy your shares at that day's net asset value.
- --------------------------------------------------------------------------------
MINIMUM INVESTMENT TO . . .
open a new account
$3,000 (regular account); $1,000 (traditional IRAs and Roth IRAs).

add to an existing account
$100 by mail or exchange; $1,000 by wire.
- --------------------------------------------------------------------------------
A NOTE ON LOW BALANCES
The Fund  reserves  the  right to close any  nonretirement  fund  account  whose
balance falls below the minimum initial  investment.  The Fund will deduct a $10
annual fee in June if your  nonretirement  account balance at that time is below
$2,500.  The low balance fee is waived for investors who have aggregate Vanguard
account assets of $50,000 or more.
- --------------------------------------------------------------------------------
BY MAIL TO . . . [ENVELOPE]
open a new account
Complete and sign the account registration form and enclose your check.

add to an existing account
Mail your check with an  Invest-By-Mail  form  detached  from your  confirmation
statement to the address listed on the form. Please do not alter  Invest-By-Mail
forms, since they are fund- and account-specific.
Make your check payable to: The Vanguard Group-26
All  purchases  must be made in U.S.  dollars,  and checks must be drawn on U.S.
banks.

First-class mail to:           Express or Registered mail to:
The Vanguard Group             The Vanguard Group
P.O. Box 1110                  455 Devon Park Drive
Valley Forge, PA 19482-1110    Wayne, PA 19087-1815

For clients of Vanguard's Institutional Division . . .

First-class mail to:           Express or Registered mail to:
The Vanguard Group             The Vanguard Group
P.O. Box 2900                  455 Devon Park Drive
Valley Forge, PA 19482-2900    Wayne, PA 19087-1815
- --------------------------------------------------------------------------------
IMPORTANT  NOTE:  To prevent  check fraud,  Vanguard will not accept checks made
payable to third parties.
- --------------------------------------------------------------------------------
BY TELEPHONE TO . . . [PHONE]
open a new account
Call Vanguard  Tele-Account*  24 hours a day--or Client Services during business
hours--to exchange from another Vanguard fund account with the same registration
(name, address,  taxpayer  identification  number, and account type). (Note that
some restrictions apply to index fund accounts.)

<PAGE>

18

add to an existing account
Call Vanguard  Tele-Account*  24 hours a day--or Client Services during business
hours--to exchange from another Vanguard fund account with the same registration
(name, address,  taxpayer  identification  number, and account type). (Note that
some restrictions  apply to index fund accounts.) Use Vanguard Fund Express (see
"Services and Account Features") to transfer assets from your bank account. Call
Client Services before your first use to verify that this option is available.

Vanguard Tele-Account     Client Services
1-800-662-6273            1-800-662-2739

*You must obtain a Personal  Identification Number (PIN) through Tele-Account at
 least seven days before you request your first exchange.
- --------------------------------------------------------------------------------
IMPORTANT  NOTE:  Once  you  have  initiated  a  telephone   transaction  and  a
confirmation  number has been assigned,  the transaction  cannot be revoked.  We
reserve the right to refuse any purchase request.
- --------------------------------------------------------------------------------
BY WIRE TO OPEN A NEW ACCOUNT OR ADD TO AN EXISTING ACCOUNT [WIRE]
Call Client  Services to arrange your wire  transaction.  Wire  transactions  to
retirement  accounts are only  available for asset  transfers and rollovers from
other financial institutions.  Individual IRA contributions will not be accepted
by wire.

Wire to:
FRB ABA 021001088
HSBC Bank USA

For credit to:
Account: 000112046
Vanguard Incoming Wire Account

In favor of:
Vanguard Morgan Growth Fund-26
[Account number, or temporary number for a new account]
[Registered account owner(s)]
[Registered address]
- --------------------------------------------------------------------------------
You can redeem (that is, sell or exchange) shares purchased by check or Vanguard
Fund  Express  at any time.  However,  while  your  redemption  request  will be
processed  at the  next-determined  net asset value after it is  received,  your
redemption  proceeds  will not be available  until  payment for your purchase is
collected, which may take up to ten calendar days.
- --------------------------------------------------------------------------------
A NOTE ON LARGE  PURCHASES
It is important that you call Vanguard  before you invest a large dollar amount.
It is our responsibility to consider the interests of all Fund shareholders, and
so we  reserve  the right to refuse any  purchase  that may  disrupt  the Fund's
operation or performance.
- --------------------------------------------------------------------------------
<PAGE>

                                                                              19

REDEEMING SHARES

This section describes how you can redeem--that is, sell or exchange--the Fund's
shares.

When Selling Shares:
- -    Vanguard sends the redemption proceeds to you or a designated third party.*
- -    You can sell all or part of your Fund shares at any time.
*May require a signature guarantee; see footnote on page 22.

When Exchanging Shares:
- -    The redemption proceeds are used to purchase shares of a different Vanguard
     fund.
- -    You must meet the receiving fund's minimum investment requirements.
- -    Vanguard reserves the right to revise or terminate the exchange  privilege,
     limit the amount of an exchange, or reject an exchange at any time, without
     notice.
- -    In  order  to  exchange  into  an  account  with a  different  registration
     (including a different name, address, or taxpayer  identification  number),
     you must include the guaranteed signatures of all current account owners on
     your written instructions.

In both  cases,  your  transaction  will be based on the Fund's  next-determined
share price,  subject to any special rules  discussed in the "Redeeming  Shares"
section of this prospectus.

- --------------------------------------------------------------------------------
NOTE:  Once a redemption  is initiated  and a  confirmation  number  given,  the
transaction CANNOT be canceled.
- --------------------------------------------------------------------------------

HOW TO REQUEST A REDEMPTION
You can request a  redemption  from your Fund  account in any one of three ways:
online, by telephone, or by mail.
     The Vanguard funds whose shares you cannot  exchange online or by telephone
are:  VANGUARD U.S. STOCK INDEX FUNDS,  VANGUARD  BALANCED INDEX FUND,  VANGUARD
INTERNATIONAL  STOCK INDEX FUNDS,  VANGUARD REIT INDEX FUND, and VANGUARD GROWTH
AND INCOME FUND. These funds do, however,  permit online and telephone exchanges
within  IRAs and other  retirement  accounts.  If you sell shares of these funds
online, you will receive a redemption check at your address of record.
- --------------------------------------------------------------------------------
ONLINE REQUESTS [COMPUTER]
ACCESS VANGUARD at www.vanguard.com
You can use your personal  computer to sell or exchange  shares of most Vanguard
funds by accessing our website.  To establish  this  service,  you must register
through our website.  We will then mail you an account access password that will
enable  you to sell  or  exchange  shares  online  (as  well  as  perform  other
transactions).
- --------------------------------------------------------------------------------
TELEPHONE REQUESTS [TELEPHONE]
All Account Types Except Retirement:
Call Vanguard  Tele-Account  24 hours a day--or Client  Services during business
hours-- to sell or exchange  shares.  You can exchange  shares from this Fund to
open an account in another Vanguard fund or to add to an existing  Vanguard fund
account with an identical registration.

Retirement Accounts:
You can  exchange--but  not  sell--shares  by  calling  Tele-Account  or  Client
Services.

<PAGE>

20

Vanguard Tele-Account     Client Services
1-800-662-6273            1-800-662-2739
- --------------------------------------------------------------------------------
SPECIAL  INFORMATION:  We will automatically  establish the telephone redemption
option for your  account,  unless you instruct us  otherwise  in writing.  While
telephone  redemption is easy and convenient,  this account  feature  involves a
risk of loss from  unauthorized or fraudulent  transactions.  Vanguard will take
reasonable  precautions  to protect your  account from fraud.  You should do the
same by keeping your account information  private and immediately  reviewing any
account  statements  that  we  send  to  you.  Make  sure  to  contact  Vanguard
immediately about any transaction you believe to be unauthorized.
- --------------------------------------------------------------------------------
We reserve the right to refuse a telephone redemption if the caller is unable to
provide:
- -    The ten-digit account number.
- -    The name and address exactly as registered on the account.
- -    The primary Social Security or employer identification number as registered
     on the account.
- -    The Personal  Identification  Number (PIN),  if applicable  (for  instance,
     Tele-Account).
     Please note that Vanguard will not be  responsible  for any account  losses
due to telephone  fraud, so long as we have taken reasonable steps to verify the
caller's identity.  If you wish to remove the telephone  redemption feature from
your account, please notify us in writing.
- --------------------------------------------------------------------------------
A NOTE ON  UNUSUAL  CIRCUMSTANCES
Vanguard  reserves the right to revise or  terminate  the  telephone  redemption
privilege at any time,  without notice.  In addition,  Vanguard can stop selling
shares or postpone  payment at times when the New York Stock  Exchange is closed
or under any emergency  circumstances  as determined by the U.S.  Securities and
Exchange Commission.  If you experience difficulty making a telephone redemption
during  periods  of  drastic  economic  or market  change,  you can send us your
request  by  regular or express  mail.  Follow  the  instructions  on selling or
exchanging shares by mail in this section.
- --------------------------------------------------------------------------------
MAIL REQUESTS [ENVELOPE]
All Account Types Except Retirement:
Send a letter of instruction signed by all registered  account holders.  Include
the fund name and  account  number and (if you are  selling) a dollar  amount or
number  of shares  OR (if you are  exchanging)  the name of the fund you want to
exchange  into and a dollar  amount or number of  shares.  To  exchange  into an
account  with a different  registration  (including a different  name,  address,
taxpayer identification number, or account type), you must provide Vanguard with
written  instructions  that  include the  guaranteed  signatures  of all current
owners of the fund from which you wish to redeem.

Vanguard Retirement Accounts:
For information on how to request distributions from:
- -    Traditional IRAs and Roth IRAs--call Client Services.
- -    SEP-IRAs, SIMPLE IRAs, 403(b)(7) custodial accounts, and Profit-Sharing and
     Money Purchase Pension (Keogh) Plans--call  Individual  Retirement Plans at
     1-800-662-2003.

Depending on your account  registration  type,  additional  documentation may be
required.

First-class mail to:           Express or Registered mail to:
The Vanguard Group             The Vanguard Group
P.O. Box 1110                  455 Devon Park Drive
Valley Forge, PA 19482-1110    Wayne, PA 19087-1815

<PAGE>
                                                                              21

For clients of Vanguard's Institutional Division . . .
First-class mail to:           Express or Registered mail to:
The Vanguard Group             The Vanguard Group
P.O. Box 2900                  455 Devon Park Drive
Valley Forge, PA 19482-2900    Wayne, PA 19087-1815
- --------------------------------------------------------------------------------
A NOTE ON LARGE REDEMPTIONS
It is important that you call Vanguard  before you redeem a large dollar amount.
It is our responsibility to consider the interests of all fund shareholders, and
so we reserve the right to delay  delivery of your  redemption  proceeds--up  to
seven days--if the amount may disrupt the Fund's operation or performance.
     If you redeem more than  $250,000  worth of Fund  shares  within any 90-day
period,  the  Fund  reserves  the  right  to pay  part or all of the  redemption
proceeds above $250,000  in-kind,  i.e., in securities,  rather than in cash. If
payment is made in-kind,  you may incur  brokerage  commissions  if you elect to
sell the securities for cash.
- --------------------------------------------------------------------------------

OPTIONS FOR REDEMPTION PROCEEDS
You may receive your redemption  proceeds in one of three ways: check,  exchange
to another Vanguard fund, or Fund Express Redemption.
- --------------------------------------------------------------------------------
CHECK REDEMPTIONS
Normally,  Vanguard  will  mail  your  check  within  two  business  days  of  a
redemption.
- --------------------------------------------------------------------------------
EXCHANGE REDEMPTIONS
As described  above, an exchange  involves using the proceeds of your redemption
to purchase shares of another Vanguard fund.
- --------------------------------------------------------------------------------
FUND EXPRESS REDEMPTIONS
Vanguard  will  electronically  transfer  funds to your  prelinked  checking  or
savings account.
- --------------------------------------------------------------------------------

FOR OUR MUTUAL PROTECTION
For your best interests and ours, Vanguard applies these additional requirements
to redemptions:

REQUEST IN "GOOD ORDER"
All redemption requests must be received by Vanguard in "good order." This means
that your request must include:
- -    The Fund name and account number.
- -    The amount of the transaction (in dollars or shares).
- -    Signatures  of all owners  exactly as  registered  on the account (for mail
     requests).
- -    Signature guarantees (if required).*
- -    Any supporting legal documentation that may be required.
- -    Any outstanding certificates representing shares to be redeemed.
*For instance,  a signature guarantee must be provided by all registered account
 shareholders  when redemption  proceeds are to be sent to a different person or
 address. A signature guarantee can be obtained from most commercial and savings
 banks,  credit  unions,  trust  companies,  or  member  firms  of a U.S.  stock
 exchange.
TRANSACTIONS ARE PROCESSED AT THE NEXT-DETERMINED SHARE PRICE AFTER VANGUARD HAS
RECEIVED ALL REQUIRED INFORMATION.

<PAGE>

22

- --------------------------------------------------------------------------------
LIMITS ON ACCOUNT ACTIVITY
Because  excessive account  transactions can disrupt  management of the Fund and
increase the Fund's costs for all shareholders, Vanguard limits account activity
as follows:
- -    You may make no more than TWO  SUBSTANTIVE  "ROUND TRIPS"  THROUGH THE FUND
     during any 12-month period.
- -    Your round trips through the Fund must be at least 30 days apart.
- -    The Fund may refuse a share purchase at any time, for any reason.
- -    Vanguard may revoke an investor's telephone exchange privilege at any time,
     for any reason.
A "round trip" is a redemption  from the Fund  followed by a purchase  back into
the  Fund.  Also,  a  "round  trip"  covers  transactions  accomplished  by  any
combination  of methods,  including  transactions  conducted by check,  wire, or
exchange to/from another Vanguard fund. "Substantive" means a dollar amount that
Vanguard  determines,  in  its  sole  discretion,  could  adversely  affect  the
management of the Fund.
- --------------------------------------------------------------------------------
RETURN YOUR SHARE CERTIFICATES
Any portion of your account represented by share certificates cannot be redeemed
until you return the  certificates  to Vanguard.  Certificates  must be returned
(unsigned),  along with a letter  requesting  the sale or  exchange  you wish to
process, via certified mail to:

The Vanguard Group
455 Devon Park Drive
Wayne, PA 19087-1815
- --------------------------------------------------------------------------------
ALL TRADES ARE FINAL
Vanguard  will not cancel any  transaction  request  (including  any purchase or
redemption)  that we believe to be authentic once the request has been initiated
and a confirmation number assigned.
- --------------------------------------------------------------------------------
UNCASHED CHECKS
Please cash your distribution or redemption  checks promptly.  Vanguard will not
pay interest on uncashed checks.
- --------------------------------------------------------------------------------
<PAGE>

                                                                              23

TRANSFERRING REGISTRATION

You can  transfer  the  registration  of your Fund  shares to  another  owner by
completing a transfer form and sending it to Vanguard.

First-class mail to:           Express or Registered mail to:
The Vanguard Group             The Vanguard Group
P.O. Box 1110                  455 Devon Park Drive
Valley Forge, PA 19482-1110    Wayne, PA 19087-1815

For clients of Vanguard's Institutional Division . . .

First-class mail to:           Express or Registered mail to:
The Vanguard Group             The Vanguard Group
P.O. Box 2900                  455 Devon Park Drive
Valley Forge, PA 19482-2900    Wayne, PA 19087-1815
- --------------------------------------------------------------------------------

FUND AND ACCOUNT UPDATES

STATEMENTS AND REPORTS
We will send you account and tax  statements to help you keep track of your Fund
account  throughout  the year as well as when you are preparing  your income tax
returns.
     In addition,  you will  receive  financial  reports  about the Fund twice a
year.  These   comprehensive   reports  include  an  assessment  of  the  Fund's
performance  (and a comparison  to its industry  benchmark),  an overview of the
financial  markets,  a  report  from  the  advisers,  and the  Fund's  financial
statements which include a listing of the Fund's holdings.
     To keep  the  Fund's  costs  as low as  possible  (so  that  you and  other
shareholders can keep more of the Fund's investment earnings), Vanguard attempts
to  eliminate  duplicate  mailings  to the same  address.  When two or more Fund
shareholders  have the same last name and address,  we send just one Fund report
to that address--instead of mailing separate reports to each shareholder. If you
want us to send  separate  reports,  notify our Client  Services  Department  at
1-800-662-2739.
- --------------------------------------------------------------------------------
CONFIRMATION STATEMENT
Sent each time you buy,  sell, or exchange  shares;  confirms the trade date and
the amount of your transaction.
- --------------------------------------------------------------------------------
PORTFOLIO SUMMARY [BOOK]
Mailed  quarterly for most  accounts;  shows the market value of your account at
the close of the statement period, as well as distributions,  purchases,  sales,
and exchanges for the current calendar year.
- --------------------------------------------------------------------------------
FUND FINANCIAL REPORTS
Mailed in February and August for this Fund.
- --------------------------------------------------------------------------------
TAX STATEMENTS
Generally  mailed in January;  report previous year's dividend and capital gains
distributions,  proceeds from the sale of shares, and distributions from IRAs or
other retirement accounts.
- --------------------------------------------------------------------------------

<PAGE>

24

- --------------------------------------------------------------------------------
AVERAGE COST REVIEW STATEMENT [BOOK]
Issued quarterly for most taxable accounts (accompanies your Portfolio Summary);
shows the average  cost of shares that you redeemed  during the  calendar  year,
using only the average cost single category method.
- --------------------------------------------------------------------------------
<PAGE>

GLOSSARY OF INVESTMENT TERMS

CAPITAL GAINS DISTRIBUTION
Payment to mutual fund  shareholders of gains realized on securities that a fund
has sold at a profit, minus any realized losses.

CASH RESERVES
Cash deposits,  short-term bank deposits,  and money market  instruments,  which
include U.S.  Treasury bills,  bank  certificates  of deposit (CDs),  repurchase
agreements, commercial paper, and banker's acceptances.

COMMON STOCK
A security  representing  ownership  rights in a  corporation.  A stockholder is
entitled  to share in the  company's  profits,  some of which may be paid out as
dividends.

DIVIDEND INCOME
Payment to  shareholders  of income from  interest or  dividends  generated by a
fund's investments.

EXPENSE RATIO
The  percentage  of a fund's  average net assets used to pay its  expenses.  The
expense  ratio  includes   management   fees,   administrative   fees,  and  any
12b-1distribution fees.

FUND DIVERSIFICATION
Holding a variety of securities so that a fund's return is not badly hurt by the
poor performance of a single security, industry, or country.

GROWTH STOCK FUND
A mutual fund that emphasizes stocks of companies believed to have above-average
prospects for growth.  Reflecting market  expectations for superior growth,  the
prices of  growth  stocks  often are  relatively  high in  comparison  with such
factors as revenue, earnings, book value, and dividends.

INVESTMENT ADVISER
An  organization  that  makes  the  day-to-day   decisions  regarding  a  fund's
investments.

MUTUAL FUND
An  investment  company  that pools the money of many people and invests it in a
variety of securities in an effort to achieve a specific objective over time.

NET ASSET VALUE (NAV)
The market value of a mutual fund's total assets, minus liabilities,  divided by
the  number of shares  outstanding.  The value of a single  share is called  its
share value or share price.

PRICE/EARNINGS (P/E) RATIO
The current share price of a stock,  divided by its per-share earnings (profits)
from the past year. A stock selling for $20, with earnings of $2 per share,  has
a price/earnings ratio of 10.

PRINCIPAL
The amount of money you put into an investment.

SECURITIES
Stocks, bonds, and other interests in investment vehicles.

TOTAL RETURN
A percentage change,  over a specified time period, in a mutual fund's net asset
value,  with the ending net asset value adjusted to account for the reinvestment
of all distributions of dividends and capital gains.

VALUE STOCK FUND
A mutual fund that  emphasizes  stocks of companies  whose growth  prospects are
generally   regarded  as  subpar  by  the  market.   Reflecting   these   market
expectations,  the  prices  of  value  stocks  typically  are  below-average  in
comparison with such factors as revenue, earnings, book value, and dividends.

VOLATILITY
The  fluctuations  in value of a mutual  fund or other  security.  The greater a
fund's volatility, the wider the fluctuations between its high and low prices.

YIELD
Income  (interest  or  dividends)  earned  by  an  investment,  expressed  as  a
percentage of the investment's price.

<PAGE>

                                                    [LOGO]
                                                    [THE VANGUARD GROUP(R) LOGO]

                                                     Post Office Box 2600
                                                     Valley Forge, PA 19482-2600

FOR MORE INFORMATION
If you'd like more information about
Vanguard Morgan Growth Fund, the
following documents are available
free upon request:

ANNUAL/SEMIANNUAL REPORTS
TO SHAREHOLDERS
Additional information about the
Fund's investments is available in
the Fund's annual and semiannual
reports to shareholders.

STATEMENT OF ADDITIONAL
INFORMATION (SAI)
The SAI provides more detailed
information about the Fund.

The current annual and semiannual
reports and the SAI are
incorporated by reference into
(and are thus legally a part of)
this prospectus.

To receive a free copy of the latest
annual or semiannual report or the
SAI, or to request additional
information about the Fund or other
Vanguard funds, please contact us
as follows:

THE VANGUARD GROUP
INVESTOR INFORMATION
DEPARTMENT
P.O. BOX 2600
VALLEY FORGE, PA
19482-2600

TELEPHONE:
1-800-662-7447 (SHIP)

TEXT TELEPHONE:
1-800-952-3335

WORLD WIDE WEB:
WWW.VANGUARD.COM

If you are a current Fund shareholder
and would like information about
your account, account transactions,
and/or account statements,
please call:

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

TEXT TELEPHONE:
1-800-749-7273


INFORMATION PROVIDED BY THE
SECURITIES AND EXCHANGE
COMMISSION (SEC)
You can review and copy
information about the Fund
(including the SAI) at the SEC's
Public Reference Room in
Washington, DC. To find out more
about this public service, call the
SEC at 1-202-942-8090. Reports and
other information about the Fund are
also available on the SEC's website
(www.sec.gov), or you can receive
copies of this information, for a fee,
by electronic request at the
following e-mail address:
[email protected]. or by writing
the Public Reference Section,
Securities and Exchange
Commission, Washington, DC
20549-0102.


Fund's Investment Company Act
file number: 811-1685

(C) 2000 The Vanguard Group, Inc.
All rights reserved.
Vanguard Marketing Corporation,
Distributor.

P026N-04/21/2000

<PAGE>


                                                          VANGUARD
                                                          MORGAN(TM) GROWTH
                                                          FUND

                                                          Participant Prospectus
                                                          April 21, 2000

This prospectus contains
financial data for the
Fund through the
fiscal year ended
December 31, 1999.


                                                                    [A MEMBER OF
                                                        THE VANGUARD GROUP LOGO]

<PAGE>

VANGUARD(R) MORGAN(TM) GROWTH FUND
Participant Prospectus
April 21, 2000
A Growth Stock Mutual Fund

- --------------------------------------------------------------------------------
  CONTENTS
- --------------------------------------------------------------------------------
  1 FUND PROFILE                       10 DIVIDENDS, CAPITAL GAINS, AND TAXES

  3 ADDITIONAL INFORMATION             11 SHARE PRICE

  3 A WORD ABOUT RISK                  12 FINANCIAL HIGHLIGHTS

  3 WHO SHOULD INVEST                  14 INVESTING WITH VANGUARD

  4 PRIMARY INVESTMENT STRATEGIES      15 ACCESSING FUND INFORMATION BY COMPUTER

  8 THE FUND AND VANGUARD              GLOSSARY (inside back cover)

  9 INVESTMENT ADVISERS
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
 WHY READING THIS PROSPECTUS IS IMPORTANT

 This  prospectus  explains the  objective,  risks,  and  strategies of Vanguard
 Morgan  Growth Fund. To highlight  terms and concepts  important to mutual fund
 investors,  we  have  provided  "Plain  Talk(R)"  explanations  along  the way.
 Reading the  prospectus  will help you to decide  whether the Fund is the right
 investment for you. We suggest that you keep it for future reference.
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
 IMPORTANT NOTE

 This prospectus is intended for participants in  employer-sponsored  retirement
 or  savings  plans.  Another  version--for investors  who would  like to open a
 personal investment account--can be obtained by calling Vanguard  at 1-800-662-
 7447.
- --------------------------------------------------------------------------------

NEITHER  THE  SECURITIES  AND  EXCHANGE  COMMISSION  NOR  ANY  STATE  SECURITIES
COMMISSION HAS APPROVED OR  DISAPPROVED  OF THESE  SECURITIES OR PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.

<PAGE>

                                                                               1

FUND PROFILE

The following profile summarizes key features of Vanguard Morgan Growth Fund.

INVESTMENT OBJECTIVE
The Fund seeks to provide long-term capital growth.

INVESTMENT STRATEGIES
The Fund  invests  primarily  in the stocks of large- and  medium-size  domestic
companies  whose revenues and/or earnings are expected to grow faster than those
of the average company in the market. The Fund also invests in stocks of smaller
companies with similar characteristics.

PRIMARY RISKS
THE FUND'S TOTAL RETURN,  LIKE STOCK PRICES  GENERALLY,  WILL FLUCTUATE WITHIN A
WIDE RANGE, SO AN INVESTOR COULD LOSE MONEY OVER SHORT OR EVEN LONG PERIODS. The
Fund is also subject to:
- -    Investment  style  risk,  which is the chance that  returns  from large- or
     mid-capitalization  growth  stocks  will trail  returns  from  other  asset
     classes or the overall stock market.
- -    Manager risk,  which is the chance that poor security  selection will cause
     the Fund to underperform other funds with similar investment objectives.

PERFORMANCE/RISK INFORMATION
The bar chart and table below  provide an indication of the risk of investing in
the Fund. The bar chart shows the Fund's  performance in each calendar year over
a ten-year  period.  The table shows how the Fund's average annual total returns
for one,  five,  and ten  calendar  years  compare  with those of a  broad-based
securities  market index. Keep in mind that the Fund's past performance does not
necessarily indicate how it will perform in the future.

              ----------------------------------------------------
                              ANNUAL TOTAL RETURNS
              ----------------------------------------------------
                              1990          -1.51%
                              1991          29.33%
                              1992           9.54%
                              1993           7.32%
                              1994          -1.67%
                              1995          35.98%
                              1996          23.30%
                              1997          30.81%
                              1998          22.26%
                              1999          34.10%
              ----------------------------------------------------

     During the period shown in the bar chart, the highest return for a calendar
quarter was 25.88% (quarter ended December 31, 1998) and the lowest return for a
quarter was -16.41% (quarter ended September 30, 1998).

      --------------------------------------------------------------------
        AVERAGE ANNUAL TOTAL RETURNS FOR YEARS ENDED DECEMBER 31, 1999
      --------------------------------------------------------------------
                                        1 YEAR     5 YEARS       10 YEARS
      --------------------------------------------------------------------
      Vanguard Morgan Growth Fund       34.10%      29.17%        18.14%
      S&P 500 Index                     21.04       28.56         18.21
      --------------------------------------------------------------------

<PAGE>
2

FEES AND EXPENSES
The following  table  describes the fees and expenses you may pay if you buy and
hold shares of the Fund. The expenses shown under Annual Fund Operating Expenses
are based upon those incurred in the fiscal year ended December 31,1999.

      SHAREHOLDER FEES (fees paid directly from your investment)
      Sales Charge (Load) Imposed on Purchases:                 None
      Sales Charge (Load) Imposed on Reinvested Dividends:      None
      Redemption Fee:                                           None
      Exchange Fee:                                             None

      ANNUAL FUND OPERATING EXPENSES (expenses deducted from the Fund's assets)
      Management Expenses:                                      0.40%
      12b-1 Distribution Fee:                                   None
      Other Expenses:                                           0.02%
       TOTAL ANNUAL FUND OPERATING EXPENSES:                    0.42%

- --------------------------------------------------------------------------------
                                PLAIN TALK ABOUT
                                  FUND EXPENSES

 All mutual funds have operating  expenses.  These expenses,  which are deducted
 from a fund's gross income,  are expressed as a percentage of the net assets of
 the fund.  Vanguard  Morgan Growth Fund's expense ratio in fiscal year 1999 was
 0.42%,  or $4.20 per $1,000 of average net assets.  The average  growth  equity
 mutual fund had expenses in 1999 of 1.53%,  or $15.30 per $1,000 of average net
 assets (derived from data provided by Lipper Inc.,  which reports on the mutual
 fund industry).  Management expenses, which are one part of operating expenses,
 include  investment  advisory  fees  as well  as  other  costs  of  managing  a
 fund--such as account  maintenance,  reporting,  accounting,  legal,  and other
 administrative expenses.
- --------------------------------------------------------------------------------

     The following example is intended to help you compare the cost of investing
in the Fund with the cost of investing in other mutual funds. It illustrates the
hypothetical  expenses  that you would incur over various  periods if you invest
$10,000 in the Fund.  This example assumes that the Fund provides a return of 5%
a year, and that operating  expenses  remain the same. The results apply whether
or not you redeem your investment at the end of each period.

            -------------------------------------------------
              1 YEAR      3 YEARS    5 YEARS      10 YEARS
            -------------------------------------------------
                $43        $135       $235         $530
            -------------------------------------------------


     THIS  EXAMPLE  SHOULD NOT BE  CONSIDERED  TO REPRESENT  ACTUAL  EXPENSES OR
PERFORMANCE  FROM THE PAST OR FOR THE  FUTURE.  ACTUAL  FUTURE  EXPENSES  MAY BE
HIGHER OR LOWER THAN THOSE SHOWN.

<PAGE>

                                                                               3

- --------------------------------------------------------------------------------
                               PLAIN TALK ABOUT
                            THE COSTS OF INVESTING

 Costs are an important  consideration in choosing a mutual fund. That's because
 you, as a shareholder,  pay the costs of operating a fund, plus any transaction
 costs associated with the fund's buying and selling of securities.  These costs
 can erode a substantial  portion of the gross income or capital  appreciation a
 fund  achieves.  Even seemingly  small  differences in expenses can, over time,
 have a dramatic effect on a fund's performance.
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
ADDITIONAL INFORMATION

DIVIDENDS AND CAPITAL GAINS         NET ASSETS AS OF DECEMBER 31, 1999
Distributed annually in December    $5.1 billion

INVESTMENT ADVISERS                 NEWSPAPER ABBREVIATION
Vanguard Morgan Growth Fund uses    Morg
three advisers:
                                    VANGUARD FUND NUMBER
- - Wellington Management Company,    026
  LLP, Boston, Mass., since
  inception                         CUSIP NUMBER
- - Franklin Portfolio Associates,    921928107
  LLC, Boston, Mass., since 1990
- - The Vanguard Group Inc., Valley   TICKER SYMBOL
  Forge, Pa., since 1993            VMRGX

INCEPTION DATE
December 31, 1968
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
A WORD ABOUT RISK

This prospectus describes risks you would face as an investor in Vanguard Morgan
Growth  Fund.  It is  important  to keep  in  mind  one of the  main  axioms  of
investing: The higher the risk of losing money, the higher the potential reward.
The  reverse,  also,  is  generally  true:  The lower  the  risk,  the lower the
potential  reward.  As you consider an investment  in the Fund,  you should also
take into account your  personal  tolerance  for the daily  fluctuations  of the
stock and bond markets.
     Look for this [FLAG] symbol  throughout the prospectus.  It is used to mark
detailed  information  about  each  type of risk that you  would  confront  as a
shareholder of the Fund.
- --------------------------------------------------------------------------------

WHO SHOULD INVEST

The Fund may be a suitable investment for you if:
- -    You wish to add a growth stock fund to your existing holdings,  which could
     include  other  stock  investments  as  well as  bond,  money  market,  and
     tax-exempt investments.
- -    You are seeking growth of capital over the long term--at least five years.
- -    You are not looking for current income.
- -    You are seeking a fund that invests in growth companies representing a wide
     variety of industries.
- -    You characterize your investment temperament as "relatively aggressive."

<PAGE>

4

- --------------------------------------------------------------------------------
                                PLAIN TALK ABOUT
                             COSTS AND MARKET-TIMING

 Some  investors  try  to  profit  from   market-timing--switching   money  into
 investments  when they expect  prices to rise,  and taking  money out when they
 expect  the  market to fall.  As money is  shifted  in and out,  a fund  incurs
 expenses for buying and selling  securities.  These costs are borne by all fund
 shareholders,  including the long-term investors who do not generate the costs.
 Therefore,  the Fund  discourages  short-term  trading by, among other  things,
 limiting the number of exchanges that shareholders may make.
- --------------------------------------------------------------------------------

     THE VANGUARD FUNDS DO NOT PERMIT MARKET-TIMING.  DO NOT INVEST IN THIS FUND
IF YOU ARE A MARKET-TIMER.

     The Fund has adopted the following  policies,  among others,  to discourage
short-term  trading:
- -    The Fund  reserves  the right to  reject  any  purchase  request--including
     exchanges from other  Vanguard  funds--that it regards as disruptive to the
     efficient  management  of the Fund.  A purchase  request  could be rejected
     because  of the  timing  of the  investment  or  because  of a  history  of
     excessive trading by the investor.
- -    There is a limit on the  number of times you can  exchange  into and out of
     the Fund (see "Redeeming Shares" in the INVESTING WITH VANGUARD section).
- -    The Fund reserves the right to stop offering shares at any time.

PRIMARY INVESTMENT STRATEGIES

This section explains the strategies that the investment advisers use in pursuit
of the Fund's objective,  long-term growth in capital.  It also explains how the
advisers implement these strategies. In addition, this section discusses several
important  risks--market risk, investment style risk, and manager risk--faced by
investors in the Fund.  The Fund's Board of Trustees  oversees the management of
the  Fund,  and  may  change  the  investment  strategies  in  the  interest  of
shareholders.

MARKET EXPOSURE
The Fund is a growth fund that invests  mainly in large- and  mid-capitalization
domestic common stocks.  The Fund also includes stocks of smaller companies that
may not have a long  history  of growth but are found  attractive  by one of the
Fund's  advisers.  Stocks  are  primarily  chosen on the basis of the  advisers'
expectations  that revenues and/or  earnings will grow faster than average.  The
Fund may also invest in securities that are convertible to common stocks.

<PAGE>

                                                                               5

- --------------------------------------------------------------------------------
                                PLAIN TALK ABOUT
                    LARGE-CAP, MID-CAP, AND SMALL-CAP STOCKS

 Stocks  of  publicly  traded   companies--and  mutual  funds  that  hold  these
 stocks--can be classified by the companies'  market value,  or  capitalization.
 Market capitalization  changes over time, and there is no "official" definition
 of the boundaries of large-,  mid-, and small-cap  stocks.  Vanguard  generally
 defines  large-capitalization  (large-cap)  funds as those  holding  stocks  of
 companies whose  outstanding  shares have a market value exceeding $12 billion;
 mid-cap funds as those holding  stocks of companies with a market value between
 $1 billion and $12 billion;  and  small-cap  funds as those  typically  holding
 stocks  of  companies  with a market  value of less than $1  billion.  Vanguard
 periodically reassesses these classifications.
- --------------------------------------------------------------------------------

[FLAG] THE FUND IS SUBJECT TO STOCK MARKET RISK,  WHICH IS THE CHANCE THAT STOCK
     PRICES OVERALL WILL DECLINE OVER SHORT OR EVEN LONG PERIODS.  STOCK MARKETS
     TEND TO MOVE IN  CYCLES,  WITH  PERIODS  OF RISING  PRICES  AND  PERIODS OF
     FALLING PRICES.

     To illustrate the volatility of stock prices, the following table shows the
best,  worst,  and average total returns for the U.S.  stock market over various
periods as measured by the Standard & Poor's 500 Index,  a widely used barometer
of market  activity.  (Total returns  consist of dividend  income plus change in
market  price.)  Note that the returns  shown do not include the costs of buying
and selling  stocks or other  expenses  that a real-world  investment  portfolio
would  incur.  Note,  also,  that the gap between best and worst tends to narrow
over the long term.

         ------------------------------------------------------
                U.S. STOCK MARKET RETURNS (1926-1999)
         ------------------------------------------------------
                          1 YEAR  5 YEARS  10 YEARS   20 YEARS
         ------------------------------------------------------
         Best              54.2%   28.6%     19.9%      17.9%
         Worst            -43.1   -12.4      -0.9        3.1
         Average           13.2    11.0      11.1       11.1
         ------------------------------------------------------

     The table  covers all of the 1-, 5-,  10-,  and 20-year  periods  from 1926
through 1999. You can see, for example,  that while the average return on common
stocks for all of the 5-year periods was 11.0%,  returns for  individual  5-year
periods  ranged from a -12.4%  average  (from 1928 through  1932) to 28.6% (from
1995 through 1999).  These average  returns  reflect past  performance on common
stocks;  you should not regard  them as an  indication  of future  returns  from
either the stock market as a whole or this Fund in particular.
     Growth stocks, which are the Fund's primary  investments,  are likely to be
even more  volatile  in price  than the stock  market as a whole.  Historically,
growth  funds have tended to  outperform  in bull  markets and  underperform  in
declining  markets.  Of course,  there is no  guarantee  that this  pattern will
continue  in the  future.  The Fund also holds a  significant  number of mid-cap
stocks,  which tend to be more volatile than the large-cap  stocks that dominate
the S&P 500 Index.
<PAGE>

6

[FLAG] THE FUND IS SUBJECT TO  INVESTMENT  STYLE RISK,  WHICH IS THE CHANCE THAT
     RETURNS FROM LARGE-OR  MID-CAPITALIZATION  GROWTH STOCKS WILL TRAIL RETURNS
     FROM THE OVERALL STOCK MARKET.  AS A GROUP,  LARGE- AND  MID-CAPITALIZATION
     GROWTH  STOCKS  EACH  TEND  TO  GO  THROUGH  CYCLES  OF  DOING   BETTER--OR
     WORSE--THAN  COMMON  STOCKS IN GENERAL.  THESE  PERIODS  HAVE, IN THE PAST,
     LASTED FOR AS LONG AS SEVERAL YEARS.

- --------------------------------------------------------------------------------
                                PLAIN TALK ABOUT
                          GROWTH FUNDS AND VALUE FUNDS

 Growth  investing  and value  investing  are two styles  employed by stock fund
 managers.   Growth  funds  generally  focus  on  companies   believed  to  have
 above-average  potential  for growth in revenue and  earnings.  Reflecting  the
 market's high  expectations for superior growth,  the prices of such stocks are
 typically above-average in relation to such measures as revenue, earnings, book
 value, and dividends.  Value funds generally emphasize stocks of companies from
 which the market  does not expect  strong  growth.  The prices of value  stocks
 typically are  below-average in comparison to such factors as earnings and book
 value, and these stocks typically pay above-average dividend yields. Growth and
 value stocks have, in the past, produced similar long-term returns, though each
 category has periods when it outperforms  the other.  In general,  growth funds
 appeal to  investors  who will  accept  more  volatility  in hopes of a greater
 increase in share price. Growth funds also may appeal to investors with taxable
 accounts  who want a higher  proportion  of returns  to come as  capital  gains
 (which may be taxed at lower  rates than  dividend  income).  Value  funds,  by
 contrast,  are  appropriate for investors who want some dividend income and the
 potential for capital gains, but are less tolerant of share-price fluctuations.
- --------------------------------------------------------------------------------

SECURITY SELECTION
Vanguard  Morgan  Growth  Fund  has  three  investment  advisers,  each of which
independently chooses and maintains a portfolio of common stocks for the Fund.
     The three investment advisers employ active investment  management methods,
which  means that  securities  are bought and sold  according  to the  advisers'
judgments  about companies and their  financial  prospects,  and about the stock
market and the economy in general.
     Wellington  Management  Company,  LLP  (Wellington  Management),  which  is
currently  responsible  for about 42% of the  Fund's  assets,  uses  traditional
methods of stock  selection-research  and analysis-to identify companies that it
believes have above-average  growth prospects,  particularly those in industries
undergoing  change.  Research is focused on  companies  with a proven  record of
sales and earnings growth, profitability,  and cash flow generation.  Securities
are sold when an investment has achieved its intended purpose,  or because it is
no longer considered attractive.
     The other two advisers, Franklin Portfolio Associates, LLC and The Vanguard
Group (Vanguard),  employ a "quantitative"  investment approach. In other words,
they use computerized  models for portfolio  construction and stock selection to
outperform,  if possible, a specific market standard. For Vanguard Morgan Growth
Fund, this market  standard is the Growth Fund Stock Index,  which is made up of
the stocks held by the nation's 50 largest growth funds.

<PAGE>

                                                                               7


     Franklin  Portfolio  Associates'   investment  strategy  focuses  on  stock
selection and fund structure.  The stock selection process is driven by a series
of more than 40 computer  models that value a universe  of 3,500  stocks.  These
models cover a broad range of publicly  available  data and focus on four areas:
fundamental momentum (based on the trends of reported and forecasted  earnings),
relative value,  future cash flow, and economic  cycles.  The individual  models
rank each security in the universe.  Using these  rankings,  a separate  program
builds a fund  consistent  with the Growth Fund Stock  Index's  characteristics.
Franklin Portfolio Associates currently manages about 39% of the Fund's assets.
     Vanguard ranks a universe of approximately  2,000 stocks using a variety of
computer  models.  These  models  focus on  investment  characteristics  such as
earnings,  fundamental momentum, share price momentum,  relative value, and cash
flow. A separate  program then selects the stocks for the Fund,  consistent with
the  Growth  Fund Stock  Index's  characteristics,  from among the stocks  rated
highly by the investment  models.  Vanguard  currently  manages about 14% of the
Fund's assets.
     The balance of Vanguard  Morgan  Growth Fund's assets (about 4%) is held in
cash  reserves,  also managed by Vanguard,  which may invest in stock futures to
give the cash  reserves  the  performance  of common  stocks.  This  strategy is
intended to keep the Fund more fully  invested in common stocks while  retaining
cash on hand to meet liquidity needs.
     The Fund is generally managed without regard to tax ramifications.

[FLAG] THE FUND IS SUBJECT TO MANAGER RISK, WHICH IS THE CHANCE THAT ONE OR MORE
     OF THE FUND'S ADVISERS WILL DO A POOR JOB OF SELECTING STOCKS.

TURNOVER RATE
Although the Fund  generally  seeks to invest for the long term,  it retains the
right to sell  securities  regardless of how long the securities have been held.
The Fund's  average  turnover rate for the past five years has been about 74.2%.
(A turnover rate of 100% would occur, for example, if the Fund sold and replaced
securities valued at 100% of its net assets within a one-year period.)

- --------------------------------------------------------------------------------
                               PLAIN TALK ABOUT
                                 TURNOVER RATE

 Before  investing in a mutual fund, you should review its turnover  rate.  This
 gives an  indication  of how  transaction  costs could affect the fund's future
 returns. In general,  the greater the volume of buying and selling by the fund,
 the greater the impact that brokerage  commissions and other  transaction costs
 will have on its  return.  Also,  funds  with high  turnover  rates may be more
 likely to generate  capital gains that must be distributed to  shareholders  as
 income subject to taxes. As of December 31, 1999, the average turnover rate for
 all growth stock funds was approximately 99%, according to Morningstar, Inc.
- --------------------------------------------------------------------------------

OTHER INVESTMENT POLICIES AND RISKS
Besides  investing  in  common  stocks of  growth  companies,  the Fund may make
certain other kinds of investments to achieve its objective.
     Although  the  Fund  typically  does not make  significant  investments  in
securities of companies  based outside the United States,  the Fund reserves the
right to invest up to 20% of its assets in foreign securities.  These securities
may be traded in U.S. or foreign

<PAGE>

8

markets.  To the extent that it owns foreign stocks, the Fund is subject to: (1)
country  risk,  which  is the  chance  that  political  events  (such as a war),
financial problems (such as government  default),  or natural disasters (such as
an  earthquake)  will weaken a country's  economy and cause  investments in that
country to lose money, and (2) currency risk, which is the chance that Americans
investing  abroad  could lose  money  because of a rise in the value of the U.S.
dollar versus foreign currencies.
     The Fund may also invest, to a limited extent, in stock futures and options
contracts,  which  are  traditional  types of  derivatives.  Losses  (or  gains)
involving  futures can  sometimes be  substantial--in  part because a relatively
small  price  movement  in a futures  contract  may result in an  immediate  and
substantial  loss (or gain)  for a fund.  This  Fund  will not use  futures  for
speculative  purposes  or as  leveraged  investments  that  magnify the gains or
losses of an investment.  The Fund's obligation under futures contracts will not
exceed 20% of its total assets.
     The reasons for which the Fund will invest in futures and options are:
- -    To keep cash on hand to meet  shareholder  redemptions or other needs while
     simulating full investment in stocks.
- -    To reduce the Fund's  transaction costs or add value when these instruments
     are favorably priced.
     The Fund may temporarily  depart from its normal  investment  policies--for
instance,   by  investing   substantially  in  cash  reserves--in   response  to
extraordinary market, economic, political, or other conditions. In doing so, the
Fund may succeed in avoiding losses but otherwise fail to achieve its investment
objective.

- --------------------------------------------------------------------------------
                               PLAIN TALK ABOUT
                                  DERIVATIVES

 A  derivative  is a financial  contract  whose value is based on (or  "derived"
 from) a traditional  security (such as a stock or a bond),  an asset (such as a
 commodity  like gold),  or a market  index  (such as the S&P 500  Index).  Some
 futures and options have been trading on regulated  exchanges for more than two
 decades.  These "traditional"  derivatives are standardized  contracts that can
 easily be bought and sold, and whose market values are determined and published
 daily. It is these  characteristics that differentiate futures and options from
 the  relatively  new  types  of  derivatives.  If used  for  speculation  or as
 leveraged investments, derivatives can carry considerable risks.
- --------------------------------------------------------------------------------

THE FUND AND VANGUARD


The Fund is a member of The Vanguard  Group, a family of more than 35 investment
companies  with more than 100 funds holding assets worth more than $550 billion.
All of the  Vanguard  funds  share  in the  expenses  associated  with  business
operations, such as personnel, office space, equipment, and advertising.
     Vanguard  also  provides   marketing   services  to  the  funds.   Although
shareholders do not pay sales commissions or 12b-1  distribution fees, each fund
pays its allocated share of The Vanguard Group's marketing costs.


<PAGE>

                                                                               9

- --------------------------------------------------------------------------------
                               PLAIN TALK ABOUT
                     VANGUARD'S UNIQUE CORPORATE STRUCTURE

 The Vanguard  Group is truly a MUTUAL mutual fund company.  It is owned jointly
 by the funds it  oversees  and thus  indirectly  by the  shareholders  in those
 funds. Most other mutual funds are operated by for-profit  management companies
 that may be owned by one person, by a group of individuals, or by investors who
 own the management company's stock. By contrast, Vanguard provides its services
 on an "at cost" basis,  and the funds' expense ratios reflect only these costs.
 No separate  management  company reaps profits or absorbs losses from operating
 the funds.
- --------------------------------------------------------------------------------

INVESTMENT ADVISERS

The Fund  employs  three  investment  advisers.  Each manages its portion of the
Fund's assets subject to the control of the Trustees and officers of the Fund.
     WELLINGTON  MANAGEMENT  COMPANY,  LLP  (Wellington  Management),  75  State
Street, Boston, MA 02109, and its predecessors have provided investment advisory
services since 1928. The firm currently  manages more than $235 billion in stock
and bond portfolios, including 15 Vanguard funds.
     Wellington  Management's advisory fee is paid quarterly.  This fee is based
on certain annual  percentages  applied to the Fund's average  month-end  assets
managed by Wellington Management.  The advisory fee may be adjusted based on the
36-month cumulative total return performance of Wellington  Management's portion
of the Fund as compared to the cumulative  total return of the Growth Fund Stock
Index.

     FRANKLIN PORTFOLIO  ASSOCIATES,  LLC, Two International  Place,  Boston, MA
02110,  is a  professional  advisory  firm founded in 1982.  Franklin  Portfolio
Associates is a wholly  owned,  indirect  subsidiary of Mellon Bank,  and has no
affiliation with the  Franklin/Templeton  Group of Funds or Franklin  Resources,
Inc. Franklin Portfolio Associates currently manages approximately $21.4 billion
in assets.

     Franklin Portfolio Associates' advisory fee is paid quarterly.  This fee is
based on the average month-end assets managed by Franklin Portfolio  Associates.
The advisory fee may be adjusted based on the 36-month  cumulative  total return
performance of Franklin Portfolio Associates' portion of the Fund as compared to
the cumulative total return of the Growth Fund Stock Index.
     THE VANGUARD  GROUP,  (Vanguard)  P.O. Box 2600,  Valley  Forge,  PA 19482,
founded in 1975,  is a  wholly-owned  subsidiary  of the Vanguard  funds.  As of
December  31,  1999,  Vanguard  served as adviser  for about  $371.4  billion in
assets. The Fund receives advisory services from Vanguard on an at cost basis.
     The  Fund's  most  recent  Statement  of  Additional  Information  provides
complete details of how Wellington  Management and Franklin Portfolio Associates
are compensated.  For the year ended December 31, 1999, the aggregate investment
advisory fee represented an effective  annual basic rate of 0.11% of average net
assets of the Fund before an increase of less than 0.01% based on performance.
     The Fund has authorized the advisers to choose brokers or dealers to handle
the purchase and sale of securities  for the Fund, and to get the best available
price and most  favorable  execution  from  these  brokers  with  respect to all
transactions.
     In the  interest  of  obtaining  better  execution  of a  transaction,  the
advisers  may choose  brokers who charge  higher  commissions.  If more than one
broker can obtain the best  available  price and most  favorable  execution of a
transaction, then the advisers are

<PAGE>

10

authorized  to choose a broker who, in addition to  executing  the  transaction,
will provide  research  services to the advisers or the Fund. Also, the Fund may
direct the  advisers  to use a  particular  broker for certain  transactions  in
exchange for commission rebates or research services provided to the Fund.
     The Board of Trustees may, without prior approval from shareholders, change
the terms of an advisory agreement or hire a new investment adviser--either as a
replacement for an existing adviser or as an additional adviser. Any significant
change in the Fund's advisory  arrangements will be communicated to shareholders
in writing. In addition, as the Fund's sponsor and overall manager, The Vanguard
Group may provide investment advisory services to the Fund, on an at-cost basis,
at any time.

- --------------------------------------------------------------------------------
                                PLAIN TALK ABOUT
                               THE FUND'S ADVISERS

 The individuals primarily responsible for Vanguard Morgan Growth Fund are:

 ROBERT D. RANDS, CFA, Senior Vice President of Wellington  Management  Company,
 LLP; has worked in investment management since 1966, with Wellington Management
 since 1978;  adviser to the Fund since 1994;  B.A.,  Yale  University;  M.B.A.,
 University of Pennsylvania.

 JOHN J. NAGORNIAK,  CFA, President of Franklin Portfolio  Associates,  LLC; has
 worked in investment  management since 1970, with Franklin Portfolio Associates
 since  1982;  adviser  to the Fund  since  1990;  B.A.,  Princeton  University;
 M.S., The Sloan School of Management, Massachusetts Institute of Technology.

 GEORGE U. SAUTER,  Managing  Director of Vanguard and head of  Vanguard's  Core
 Management  Group;  has worked in  investment  management  since 1985;  primary
 responsibility  for Vanguard's stock indexing policy and strategy since joining
 the company in 1987; A.B., Dartmouth College; M.B.A., University of Chicago.
- --------------------------------------------------------------------------------

DIVIDENDS, CAPITAL GAINS, AND TAXES

The Fund  distributes to shareholders  virtually all of its net income (interest
and dividends,  less  expenses),  as well as any capital gains realized from the
sale of its holdings.  Distributions  generally occur in December.  In addition,
the Fund may occasionally be required to make  supplemental  dividend or capital
gains distributions at some other time during the year.
     Your  dividend  and  capital  gains  distributions  will be  reinvested  in
additional  Fund  shares  and  accumulate  on a  tax-deferred  basis  if you are
investing through an employer-sponsored retirement or savings plan. You will not
owe taxes on these  distributions until you begin withdrawals from the plan. You
should consult your plan administrator, your plan's Summary Plan Description, or
your tax adviser about the tax consequences of plan withdrawals.

<PAGE>

                                                                              11

- --------------------------------------------------------------------------------
                                PLAIN TALK ABOUT
                                  DISTRIBUTIONS

 As a  shareholder,  you are  entitled  to your share of the fund's  income from
 interest and  dividends,  and gains from the sale of  investments.  You receive
 such  earnings as either an income  dividend or a capital  gains  distribution.
 Income  dividends  come from both the  dividends  that the fund  earns from its
 holdings  and  the  interest  it  receives  from  its  money  market  and  bond
 investments.  Capital gains are realized whenever the fund sells securities for
 higher prices than it paid for them. These capital gains are either  short-term
 or long-term, depending on whether the fund held the securities for one year or
 less, or more than one year.
- --------------------------------------------------------------------------------

SHARE PRICE

The Fund's share price,  called its net asset value,  or NAV, is calculated each
business day after the close of regular  trading on the New York Stock  Exchange
(the NAV is not  calculated  on  holidays  or other  days when the  Exchange  is
closed).  Net asset  value per share is computed by adding up the total value of
the Fund's  investments  and other assets,  subtracting  any of its  liabilities
(debts), and then dividing by the number of Fund shares outstanding:

                                   TOTAL ASSETS - LIABILITIES
             NET ASSET VALUE  =  -------------------------------
                                  NUMBER OF SHARES OUTSTANDING

     Knowing the daily net asset value is useful to you as a shareholder because
it indicates the current value of your investment. The Fund's NAV, multiplied by
the  number of  shares  you own,  gives you the  dollar  amount  you would  have
received had you sold all of your shares back to the Fund that day.
     A NOTE ON PRICING:  The Fund's  investments  will be priced at their market
value when market  quotations are readily  available.  When these quotations are
not  readily  available,  investments  will  be  priced  at  their  fair  value,
calculated according to procedures adopted by the Fund's Board of Trustees.
     The Fund's  share price can be found  daily in the mutual fund  listings of
most major newspapers under the heading "Vanguard Funds".  Different  newspapers
use different abbreviations of the Fund's name, but the most common is MORG.

<PAGE>

12

FINANCIAL HIGHLIGHTS

The following financial  highlights table is intended to help you understand the
Fund's financial  performance for the past five years,  and certain  information
reflects  financial  results for a single Fund share.  The total  returns in the
table  represent the rate that an investor would have earned or lost each period
on an investment in the Fund (assuming  reinvestment of all dividend and capital
gains  distributions).  This  information  has been derived  from the  financial
statements audited by PricewaterhouseCoopers LLP, independent accountants, whose
report--along  with the Fund's financial  statements--is  included in the Fund's
most recent annual report to  shareholders.  You may have the annual report sent
to you without charge by contacting Vanguard.

- --------------------------------------------------------------------------------
                                          VANGUARD MORGAN GROWTH FUND
                                            YEAR ENDED DECEMBER 31,
                         -------------------------------------------------------
                           1999        1998        1997        1996        1995
- --------------------------------------------------------------------------------
NET ASSET VALUE,
 BEGINNING OF YEAR       $19.72      $17.54      $15.63      $14.09      $11.36
- --------------------------------------------------------------------------------
INVESTMENT OPERATIONS
 Net Investment Income      .14         .18        .160         .14         .15
 Net Realized and
  Unrealized Gain (Loss)
  on Investments           6.29        3.61       4.435        3.07        3.89
                         -------------------------------------------------------
  Total from Investment
   Operations              6.43        3.79       4.595        3.21        4.04
                         -------------------------------------------------------
DISTRIBUTIONS
 Dividends from Net
  Investment Income        (.15)       (.18)      (.160)       (.14)       (.15)
 Distributions from
  Realized Capital Gains  (3.08)      (1.43)     (2.525)      (1.53)      (1.16)
                         -------------------------------------------------------
  Total Distributions     (3.23)      (1.61)     (2.685)      (1.67)      (1.31)
- --------------------------------------------------------------------------------
NET ASSET VALUE, END
 OF YEAR                 $22.92      $19.72      $17.54      $15.63      $14.09
================================================================================

TOTAL RETURN             34.10%      22.26%      30.81%      23.30%      35.98%
================================================================================

RATIOS/SUPPLEMENTAL DATA
 Net Assets, End of
  Year (Millions)        $5,066      $3,555      $2,795      $2,054      $1,471
 Ratio of Total
  Expenses to Average
  Net Assets              0.42%       0.44%       0.48%       0.51%       0.49%
 Ratio of Net
  Investment Income to
  Average Net Assets      0.71%       0.96%       0.93%       0.97%       1.10%
 Turnover Rate              65%         81%         76%         73%         76%
================================================================================

<PAGE>

                                                                              13

- --------------------------------------------------------------------------------
                                PLAIN TALK ABOUT
                   HOW TO READ THE FINANCIAL HIGHLIGHTS TABLE

 The Fund began fiscal 1999 with a net asset value  (price) of $19.72 per share.
 During  the  year,  the Fund  earned  $0.14 per share  from  investment  income
 (interest  and  dividends)  and  $6.29  per  share  from  investments  that had
 appreciated in value or that were sold for higher prices than the Fund paid for
 them.
 Shareholders received $3.23 per share in the form of dividend and capital gains
 distributions.  A portion of each year's  distributions may come from the prior
 year's income or capital gains.
 The  earnings  ($6.43  per  share)  minus the  distributions  ($3.23 per share)
 resulted  in a share  price  of  $22.92  at the end of the  year.  This  was an
 increase of $3.20 per share (from $19.72 at the beginning of the year to $22.92
 at the end of the year). For a shareholder who reinvested the  distributions in
 the purchase of more shares,  the total return from the Fund was 34.10% for the
 year.
 As of December 31, 1999, the Fund had $5.1 billion in net assets. For the year,
 its  expense  ratio  was  0.42%  ($4.20  per  $1,000  of net  assets);  and net
 investment  income  amounted to 0.71% of its  average  net assets.  It sold and
 replaced securities valued at 65% of its net assets.
- --------------------------------------------------------------------------------

"Standard & Poor's(R),"  "S&P(R),"  "S&P  500(R),"  "Standard & Poor's 500," and
"500" are trademarks of The McGraw-Hill Companies, Inc.

<PAGE>

14

INVESTING WITH VANGUARD

The Fund is an investment  option in your  retirement or savings plan. Your plan
administrator  or your  employee  benefits  office can provide you with detailed
information  on how to  participate in your plan and how to elect the Fund as an
investment  option.
- -    If you have any questions about the Fund or Vanguard, including those about
     the Fund's investment objective,  strategies,  or risks, contact Vanguard's
     Participant Access Center, toll-free, at 1-800-523-1188.
- -    If you have questions about your account,  contact your plan  administrator
     or the organization that provides recordkeeping services for your plan.

INVESTMENT OPTIONS AND ALLOCATIONS
Your  plan's  specific  provisions  may  allow  you to  change  your  investment
selections,  the amount of your  contributions,  or how your  contributions  are
allocated  among the  investment  choices  available  to you.  Contact your plan
administrator or employee benefits office for more details.

TRANSACTIONS
Contributions,  exchanges,  or redemptions of the Fund's shares are processed as
soon as they have been received by Vanguard in good order. Good order means that
your request includes complete  information on your contribution,  exchange,  or
redemption, and that Vanguard has received the appropriate assets.
     In all cases, your transaction will be based on the Fund's  next-determined
net asset value after  Vanguard  receives  your  request (or, in the case of new
contributions,  the next- determined net asset value after Vanguard receives the
order from your plan administrator).  As long as this request is received before
the close of trading on the New York Stock  Exchange,  generally 4 p.m.  Eastern
time, you will receive that day's net asset value.

EXCHANGES
The exchange  privilege (your ability to redeem shares from one fund to purchase
shares of another  fund) may be available to you through your plan.  Although we
make every  effort to maintain  the exchange  privilege,  Vanguard  reserves the
right to revise or terminate this privilege,  limit the amount of an exchange or
reject any exchange,  at any time, without notice.  Because excessive  exchanges
can potentially  disrupt the management of the Fund and increase its transaction
costs,  Vanguard  limits  participant  exchange  activity  to no more  than FOUR
SUBSTANTIVE  "ROUND TRIPS"  THROUGH THE FUND (at least 90 days apart) during any
12-month  period.  A "round  trip" is a redemption  from the Fund  followed by a
purchase back into the Fund.  "Substantive"  means a dollar amount that Vanguard
determines, in its sole discretion, could adversely affect the management of the
Fund.
     Before  making an exchange to or from another fund  available in your plan,
consider the following:
- -    Certain investment options,  particularly funds made up of company stock or
     investment contracts, may be subject to unique restrictions.
- -    Make sure to read that  fund's  prospectus.  Contact  Vanguard  Participant
     Access Center, toll-free, at 1-800-523-1188 for a copy.
- -    Vanguard can accept exchanges only as permitted by your plan.  Contact your
     plan  administrator for details on the exchange policies that apply to your
     plan.

<PAGE>

                                                                              15

ACCESSING FUND INFORMATION BY COMPUTER

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VANGUARD ON THE WORLD WIDE WEB www.vanguard.com
Use your personal computer to visit Vanguard's education-oriented website, which
provides  timely news and  information  about  Vanguard  funds and services;  an
online  "university"  that  offers  a  variety  of  mutual  fund  classes;   and
easy-to-use,  interactive  tools to help you  create  your  own  investment  and
retirement strategies.
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GLOSSARY OF INVESTMENT TERMS

CAPITAL GAINS DISTRIBUTION
Payment to mutual fund  shareholders of gains realized on securities that a fund
has sold at a profit, minus any realized losses.

CASH RESERVES
Cash deposits,  short-term bank deposits,  and money market  instruments,  which
include U.S.  Treasury bills,  bank  certificates  of deposit (CDs),  repurchase
agreements, commercial paper, and banker's acceptances.

COMMON STOCK
A security  representing  ownership  rights in a  corporation.  A stockholder is
entitled  to share in the  company's  profits,  some of which may be paid out as
dividends.

DIVIDEND INCOME
Payment to  shareholders  of income from  interest or  dividends  generated by a
fund's investments.

EXPENSE RATIO
The  percentage  of a fund's  average net assets used to pay its  expenses.  The
expense  ratio  includes   management   fees,   administrative   fees,  and  any
12b-1distribution fees.

FUND DIVERSIFICATION
Holding a variety of securities so that a fund's return is not badly hurt by the
poor performance of a single security, industry, or country.

GROWTH STOCK FUND
A mutual fund that emphasizes stocks of companies believed to have above-average
prospects for growth.  Reflecting market  expectations for superior growth,  the
prices of  growth  stocks  often are  relatively  high in  comparison  with such
factors as revenue, earnings, book value, and dividends.

INVESTMENT ADVISER
An  organization  that  makes  the  day-to-day   decisions  regarding  a  fund's
investments.

MUTUAL FUND
An  investment  company  that pools the money of many people and invests it in a
variety of securities in an effort to achieve a specific objective over time.

NET ASSET VALUE (NAV)
The market value of a mutual fund's total assets, minus liabilities,  divided by
the  number of shares  outstanding.  The value of a single  share is called  its
share value or share price.

PRICE/EARNINGS (P/E) RATIO
The current share price of a stock,  divided by its per-share earnings (profits)
from the past year. A stock selling for $20, with earnings of $2 per share,  has
a price/earnings ratio of 10.

PRINCIPAL
The amount of money you put into an investment.

SECURITIES
Stocks, bonds, and other interests in investment vehicles.

TOTAL RETURN
A percentage change,  over a specified time period, in a mutual fund's net asset
value,  with the ending net asset value adjusted to account for the reinvestment
of all distributions of dividends and capital gains.

VALUE STOCK FUND
A mutual fund that  emphasizes  stocks of companies  whose growth  prospects are
generally   regarded  as  subpar  by  the  market.   Reflecting   these   market
expectations,  the  prices  of  value  stocks  typically  are  below-average  in
comparison with such factors as revenue, earnings, book value, and dividends.

VOLATILITY
The  fluctuations  in value of a mutual  fund or other  security.  The greater a
fund's volatility, the wider the fluctuations between its high and low prices.

YIELD
Income  (interest  or  dividends)  earned  by  an  investment,  expressed  as  a
percentage of the investment's price.

<PAGE>

                                                    [LOGO]
                                                    [THE VANGUARD GROUP(R) LOGO]

                                                     Institutional Division
                                                     Post Office Box 2900
                                                     Valley Forge, PA 19482-2900

FOR MORE INFORMATION
If you'd like more information about
Vanguard Morgan Growth Fund, the
following documents are available
free upon request:

ANNUAL/SEMIANNUAL REPORTS
TO SHAREHOLDERS
Additional information about the
Fund's investments is available in
the Fund's annual and semiannual
reports to shareholders.

STATEMENT OF ADDITIONAL
INFORMATION (SAI)
The SAI provides more detailed
information about the Fund.

The current annual and semiannual
reports and the SAI are
incorporated by reference into
(and are thus legally a part of)
this prospectus.

To receive a free copy of the latest
annual or semiannual report or the
SAI, or to request additional
information about the Fund or other
Vanguard funds, please contact us
as follows:

THE VANGUARD GROUP
PARTICIPANT ACCESS CENTER
P.O. BOX 2900
VALLEY FORGE, PA 19482-2900

TELEPHONE:
1-800-523-1188

TEXT TELEPHONE:
1-800-523-8004

WORLD WIDE WEB:
WWW.VANGUARD.COM


INFORMATION PROVIDED BY THE
SECURITIES AND EXCHANGE
COMMISSION (SEC)
You can review and copy
information about the Fund
(including the SAI) at the SEC's
Public Reference Room in
Washington, DC. To find out more
about this public service, call the
SEC at 1-202-942-8090. Reports
and other information about the
Fund are also available on the
SEC's website (www.sec.gov),
or you can receive copies of this
information, for a fee,
by electronic request at the
following e-mail address:
[email protected], or by writing
the Public Reference Section,
Securities and Exchange
Commission, Washington, DC
20549-0102.


Fund's Investment Company Act
file number: 811-1685

(C) 2000 The Vanguard Group, Inc.
All rights reserved.
Vanguard Marketing Corporation,
Distributor.

I026N-04/21/2000

<PAGE>


                                     PART B

                           VANGUARD MORGAN GROWTH FUND
                                   (THE FUND)

                       STATEMENT OF ADDITIONAL INFORMATION

                                  APRIL 21, 2000

This Statement is not a prospectus  but should be read in  conjunction  with the
Fund's current Prospectus (dated April 21, 2000). To obtain, without charge, the
Prospectus or the most recent Annual Report to Shareholders,  which contains the
Fund's financial statements as hereby incorporated by reference, please call:

                        INVESTOR INFORMATION DEPARTMENT:
                                 1-800-662-7447

                                TABLE OF CONTENTS

DESCRIPTION OF THE FUND......................................................B-1
INVESTMENT POLICIES..........................................................B-3
FUNDAMENTAL INVESTMENT LIMITATIONS...........................................B-8
PURCHASE OF SHARES...........................................................B-9
REDEMPTION OF SHARES........................................................B-10
SHARE PRICE.................................................................B-10
MANAGEMENT OF THE FUND......................................................B-11
INVESTMENT ADVISORY SERVICES................................................B-14
PORTFOLIO TRANSACTIONS......................................................B-18
YIELD AND TOTAL RETURN......................................................B-18
PERFORMANCE MEASURES........................................................B-20
COMPARATIVE INDEXES.........................................................B-21
FINANCIAL STATEMENTS........................................................B-23

                             DESCRIPTION OF THE FUND
ORGANIZATION

The Fund was organized as a Delaware corporation in 1968, merged into a Maryland
corporation in 1973, and then  reorganized as a Delaware  business trust in June
1998.  Prior to its  reorganization  as a Delaware  business trust, the Fund was
known as  Vanguard/Morgan  Growth  Fund,  Inc. The Fund is  registered  with the
United States  Securities and Exchange  Commission  (the  Commission)  under the
Investment  Company  Act of 1940  (the  1940  Act) as an  open-end,  diversified
management  investment company. It currently offers the following investor share
class fund:  Vanguard Morgan Growth Fund (the Fund). The Fund has the ability to
offer additional funds or classes of shares.  There is no limit on the number of
full and fractional shares that the Fund may issue for a single fund or class of
shares.

SERVICE PROVIDERS

     CUSTODIAN.  State  Street  Bank and Trust  Company,  225  Franklin  Street,
Boston,  Massachusetts  02110 serves as the Fund's  custodian.  The custodian is
responsible for maintaining the Fund's assets and keeping all necessary accounts
and records of Fund assets.

     INDEPENDENT ACCOUNTANTS.  PricewaterhouseCoopers LLP, 30 South 17th Street,
Philadelphia,  Pennsylvania 19103, serves as the Fund's independent accountants.
The  accountants  audit  financial  statements  for the Fund and  provide  other
related services.

     TRANSFER  AND   DIVIDEND-PAYING   AGENT.  The  Fund's  transfer  agent  and
dividend-paying  agent is The Vanguard  Group,  Inc.,  100  Vanguard  Boulevard,
Malvern, Pennsylvania 19355.

                                      B-1
<PAGE>

CHARACTERISTICS OF THE FUND'S SHARES

     RESTRICTIONS  ON HOLDING OR DISPOSING OF SHARES.  There are no restrictions
on the right of  shareholders  to retain or dispose of the Fund's shares,  other
than the possible future  termination of the Fund. The Fund may be terminated by
reorganization  into another mutual fund or by liquidation  and  distribution of
the  assets  of the  affected  fund.  Unless  terminated  by  reorganization  or
liquidation, the Fund will continue indefinitely.

     SHAREHOLDER  LIABILITY.  The Fund is organized  under  Delaware law,  which
provides  that  shareholders  of a  business  trust  are  entitled  to the  same
limitations of personal  liability as  shareholders  of a corporation  organized
under Delaware law. Effectively,  this means that a shareholder of the Fund will
not be personally liable for payment of the Fund's debts except by reason of his
or her own conduct or acts. In addition,  a shareholder  could incur a financial
loss on account of a Fund  obligation  only if the Fund itself had no  remaining
assets with which to meet such  obligation.  We believe that the  possibility of
such a situation arising is extremely remote.

     DIVIDEND  RIGHTS.  The  shareholders  of a fund are entitled to receive any
dividends or other distributions declared for such fund. No shares have priority
or  preference  over  any  other  shares  of  the  same  fund  with  respect  to
distributions. Distributions will be made from the assets of a fund, and will be
paid ratably to all  shareholders of the fund (or class) according to the number
of shares of such fund (or class) held by  shareholders  on the record date. The
amount of income  dividends per share may vary between separate share classes of
the same fund based upon  differences  in the way that  expenses  are  allocated
between share classes pursuant to a multiple class plan.

     VOTING  RIGHTS.  Shareholders  are  entitled  to vote on a matter if: (i) a
shareholder  vote is required  under the 1940 Act;  (ii) the matter  concerns an
amendment to the Declaration of Trust that would adversely  affect to a material
degree the rights and  preferences  of the shares of any class or fund; or (iii)
the Trustees determine that it is necessary or desirable to obtain a shareholder
vote.  The 1940 Act requires a  shareholder  vote under  various  circumstances,
including to elect or remove  Trustees upon the written  request of shareholders
representing 10% or more of the Fund's net assets, and to change any fundamental
policy of the Fund. Shareholders of the Fund receive one vote for each dollar of
net  asset  value  owned on the  record  date,  and a  fractional  vote for each
fractional dollar of net asset value owned on the record date. However, only the
shares of the fund affected by a particular  matter are entitled to vote on that
matter.  Voting  rights  are  noncumulative  and  cannot be  modified  without a
majority vote.

     LIQUIDATION  RIGHTS.  In the  event of  liquidation,  shareholders  will be
entitled to receive a pro rata share of the Fund's net assets.

     PREEMPTIVE  RIGHTS.  There are no  preemptive  rights  associated  with the
Fund's shares.

     CONVERSION  RIGHTS.  There are no  conversion  rights  associated  with the
Fund's shares.

     REDEMPTION  PROVISIONS.  The Fund's redemption  provisions are described in
its  current   prospectus   and  elsewhere  in  this   Statement  of  Additional
Information.

     SINKING FUND PROVISIONS. The Fund has no sinking fund provisions.

     CALLS OR  ASSESSMENT.  The Fund's shares,  when issued,  are fully paid and
non-assessable.

TAX STATUS OF THE FUND

The Fund  intends to continue  to qualify as a  "regulated  investment  company"
under  Subchapter M of the Internal  Revenue Code. This special tax status means
that the Fund will not be liable for  federal  tax on income and  capital  gains
distributed to shareholders.  In order to preserve its tax status, the Fund must
comply with certain  requirements.  If the Fund fails to meet these requirements
in any  taxable  year,  it will  be  subject  to tax on its  taxable  income  at
corporate rates, and all distributions from earnings and profits,  including any
distributions of net tax-exempt  income and net long-term capital gains, will be
taxable to  shareholders  as ordinary  income.  In  addition,  the Fund could be
required to recognize unrealized gains, pay substantial taxes and

                                      B-2
<PAGE>

interest, and make substantial  distributions before regaining its tax status as
a regulated investment company.

                              INVESTMENT POLICIES

The following  policies  supplement the Fund's investment  policies set forth in
the Prospectus.

     TURNOVER  RATE.  While the rate of turnover  is not a limiting  factor when
management deems changes appropriate, it is anticipated that the annual turnover
rate will not normally exceed 100%. A rate of turnover of 100% could occur,  for
example,  if the Fund sold and replaced  securities  valued at 100% of its total
assets.  The Fund's  turnover rate for each of its last five fiscal years is set
forth under "Financial Highlights" in the Fund's Prospectus.

     REPURCHASE  AGREEMENTS.  The Fund may invest in repurchase  agreements with
commercial  banks,  brokers,  or dealers  either for  defensive  purposes due to
market  conditions  or to  generate  income  from its excess  cash  balances.  A
repurchase   agreement  is  an  agreement   under  which  the  Fund  acquires  a
fixed-income  security (generally a security issued by the U.S. Government or an
agency  thereof,  a banker's  acceptance,  or a  certificate  of deposit) from a
commercial bank, broker, or dealer, subject to resale to the seller at an agreed
upon price and date  (normally,  the next business day). A repurchase  agreement
may be considered a loan collateralized by securities. The resale price reflects
an agreed upon interest rate  effective for the period the instrument is held by
the Fund and is unrelated to the interest rate on the underlying instrument.  In
these  transactions,  the  securities  acquired by the Fund  (including  accrued
interest  earned  thereon) must have a total value in excess of the value of the
repurchase  agreement  and are held by a custodian  bank until  repurchased.  In
addition,  the Fund's  Board of  Trustees  will  monitor  the Fund's  repurchase
agreement transactions generally and will establish guidelines and standards for
review by the investment adviser of the creditworthiness of any bank, broker, or
dealer party to a repurchase agreement with the Fund.

     The use of repurchase  agreements  involves certain risks. For example,  if
the other party to the agreement  defaults on its  obligation to repurchase  the
underlying instrument at a time when the value of the security has declined, the
Fund may incur a loss upon  disposition  of the security.  If the other party to
the agreement  becomes  insolvent and subject to liquidation  or  reorganization
under  bankruptcy  or other  laws,  a court may  determine  that the  underlying
security is collateral for a loan by the Fund not within the control of the Fund
and  therefore  the   realization  by  the  Fund  on  such   collateral  may  be
automatically  stayed.  Finally, it is possible that the Fund may not be able to
substantiate  its  interest  in the  underlying  security  and may be  deemed an
unsecured  creditor  of the other  party to the  agreement.  While the  advisers
acknowledge  these risks,  it is expected that they will be  controlled  through
careful monitoring procedures.

     LENDING OF SECURITIES.  The Fund may lend its securities on a short-term or
long-term  basis  to  qualified   institutional  investors  (typically  brokers,
dealers,  banks, or other financial  institutions) who need to borrow securities
in order  to  complete  certain  transactions,  such as  covering  short  sales,
avoiding failures to deliver securities,  or completing arbitrage operations. By
lending  its  portfolio  securities,  the  Fund  attempts  to  increase  its net
investment  income through the receipt of interest on the loan. Any gain or loss
in the market price of the securities loaned that might occur during the term of
the loan would be for the account of the Fund. The terms, the structure, and the
aggregate  amount of such loans must be  consistent  with the 1940 Act,  and the
Rules or  interpretations of the Commission  thereunder.  These provisions limit
the  amount  of  securities  the Fund may  lend to 33 1/3% of the  Fund's  total
assets,  and require  that (a) the borrower  pledge and  maintain  with the Fund
collateral  consisting  of cash,  an  irrevocable  letter of credit  issued by a
domestic U.S.  bank, or securities  issued or guaranteed by the U.S.  Government
having a value at all times  not less  than 100% of the value of the  securities
loaned,  (b) the  borrower  add to such  collateral  whenever  the  price of the
securities  loaned  rises (i.e.,  the borrower  "marks to the market" on a daily
basis), (c) the loan be made subject to termination by the Fund at any time, and
(d) the Fund  receive  reasonable  interest  on the loan  (which may include the
Fund's investing any cash

                                      B-3
<PAGE>

collateral in interest bearing short-term investments),  any distribution on the
loaned securities and any increase in their market value. Loan arrangements made
by the Fund will  comply  with all  other  applicable  regulatory  requirements,
including the rules of the New York Stock Exchange (the  Exchange),  which rules
presently require the borrower, after notice, to redeliver the securities within
the normal  settlement  time of three  business  days.  All  relevant  facts and
circumstances,   including  the  creditworthiness  of  the  broker,  dealer,  or
institution,  will be considered in making decisions with respect to the lending
of securities, subject to review by the Fund's Board of Trustees.

     At the  present  time,  the Staff of the  Commission  does not object if an
investment  company pays  reasonable  negotiated  fees in connection with loaned
securities,  so long as such  fees  are set  forth  in a  written  contract  and
approved by the investment company's Trustees.  In addition,  voting rights pass
with the loaned  securities,  but if a material  event will occur  affecting  an
investment on loan, the loan must be called and the securities voted.

     VANGUARD INTERFUND LENDING PROGRAM.  The Commission has issued an exemptive
order  permitting the Fund and other Vanguard funds to participate in Vanguard's
interfund  lending  program.  This program  allows the Vanguard  funds to borrow
money from and loan money to each other for temporary or emergency purposes. The
program is subject to a number of conditions,  including the requirement that no
fund may borrow or lend money  through  the  program  unless it  receives a more
favorable  interest rate than is available  from a typical bank for a comparable
transaction. In addition, a Vanguard fund may participate in the program only if
and to the  extent  that  such  participation  is  consistent  with  the  fund's
investment  objective and other investment  policies.  The Boards of Trustees of
the Vanguard  funds are  responsible  for ensuring  that the  interfund  lending
program operates in compliance with all conditions of the Commission's exemptive
order.

     FOREIGN INVESTMENTS. As indicated in the Prospectus, the Fund may invest up
to  20%  of its  assets  in  foreign  securities  and  may  engage  in  currency
transactions with respect to these investments.  Investors should recognize that
investing in foreign companies involves certain special considerations which are
not typically associated with investing in U.S. companies.

     Currency  Risk.  Since  the  stocks of  foreign  companies  are  frequently
denominated  in  foreign  currencies,  and since the Fund may  temporarily  hold
uninvested  reserves in bank  deposits in foreign  currencies,  the Fund will be
affected  favorably or  unfavorably by changes in currency rates and in exchange
control regulations,  and may incur costs in connection with conversions between
various currencies.  The investment policies of the Fund permit it to enter into
forward  foreign  currency  exchange  contracts  in order to hedge  holdings and
commitments  against  changes  in the  level  of  future  currency  rates.  Such
contracts  involve an  obligation  to purchase or sell a specific  currency at a
future date at a price set at the time of the contract.

     Country  Risk. As foreign  companies  are not generally  subject to uniform
accounting, auditing, and financial reporting standards and practices comparable
to those applicable to domestic companies,  there may be less publicly available
information  about certain  foreign  companies  than about  domestic  companies.
Securities of some foreign companies are generally less liquid and more volatile
than  securities  of  comparable  domestic  companies.  There is generally  less
government  supervision and regulation of stock exchanges,  brokers,  and listed
companies  than in the  U.S.  In  addition,  with  respect  to  certain  foreign
countries,  there is the possibility of expropriation or confiscatory  taxation,
political or social instability,  or diplomatic  developments which could affect
U.S. investments in those countries.

     Although the Fund will endeavor to achieve most favorable  execution  costs
in its portfolio  transactions in foreign securities,  fixed commissions on many
foreign stock exchanges are generally higher than negotiated commissions on U.S.
exchanges.  In  addition,  it  is  expected  that  the  expenses  for  custodial
arrangements of the Fund's foreign  securities will be somewhat greater than the
expenses for the custodial  arrangement  for handling  U.S.  securities of equal
value.

                                      B-4
<PAGE>

     Certain foreign  governments  levy  withholding  taxes against dividend and
interest  income.  Although  in some  countries  a  portion  of  these  taxes is
recoverable,  the non-recovered portion of foreign withholding taxes will reduce
the income the Fund receives from its foreign investments.

     FEDERAL TAX  TREATMENT OF NON-U.S.  TRANSACTIONS.  Special rules govern the
Federal income tax treatment of certain  transactions  denominated in terms of a
currency  other than the U.S.  dollar or determined by reference to the value of
one or more  currencies  other than the U.S.  dollar.  The types of transactions
covered by the special rules include the following:  (i) the  acquisition of, or
becoming the obligor under, a bond or other debt instrument  (including,  to the
extent provided in Treasury regulations,  preferred stock); (ii) the accruing of
certain  trade  receivables  and  payables;  and  (iii)  the  entering  into  or
acquisition  of any  forward  contract,  futures  contract,  option,  or similar
financial instrument if such instrument is not marked-to-market. The disposition
of a currency other than the U.S. dollar by a taxpayer whose functional currency
is the U.S.  dollar is also  treated as a  transaction  subject  to the  special
currency rules. However,  foreign  currency-related  regulated futures contracts
and nonequity options are generally not subject to the special currency rules if
they are or would be  treated as sold for their fair  market  value at  year-end
under the  marking-to-market  rules applicable to other futures contracts unless
an  election  is made  to have  such  currency  rules  apply.  With  respect  to
transactions  covered by the special  rules,  foreign  currency  gain or loss is
calculated separately from any gain or loss on the underlying transaction and is
normally  taxable as ordinary  income or loss.  A taxpayer may elect to treat as
capital  gain or  loss  foreign  currency  gain or  loss  arising  from  certain
identified  forward contracts,  futures contracts,  and options that are capital
assets in the hands of the  taxpayer  and which are not part of a straddle.  The
Treasury Department issued regulations under which certain  transactions subject
to  the  special  currency  rules  that  are  part  of a  "section  988  hedging
transaction" (as defined in the Internal  Revenue Code of 1986, as amended,  and
the Treasury regulations) will be integrated and treated as a single transaction
or otherwise  treated  consistently  for purposes of the Code.  Any gain or loss
attributable to the foreign currency component of a transaction  engaged in by a
Fund which is not subject to the special  currency rules (such as foreign equity
investments other than certain preferred stocks) will be treated as capital gain
or loss  and  will not be  segregated  from  the gain or loss on the  underlying
transaction.  It is  anticipated  that some of the  non-U.S.  dollar-denominated
investments and foreign currency  contracts the Fund may make or enter into will
be subject to the special currency rules described above.

     ILLIQUID  SECURITIES.  The Fund may  invest up to 15% of its net  assets in
illiquid securities.  Illiquid securities are securities that may not be sold or
disposed of in the ordinary  course of business  within seven  business  days at
approximately the value at which they are being carried on the Fund's books.

     The Fund may invest in restricted,  privately placed securities that, under
securities  laws, may be sold only to qualified  institutional  buyers.  Because
these securities can be resold only to qualified  institutional  buyers or after
they  have been held for a number  of  years,  they may be  considered  illiquid
securities--  meaning  that they could be  difficult  for the Fund to convert to
cash if needed.

     If a  substantial  market  develops for a restricted  security  held by the
Fund, it will be treated as a liquid security, in accordance with procedures and
guidelines approved by the Fund's Board of Trustees. This will generally include
securities that are restricted but which may be sold to qualified  institutional
buyers under Rule 144A of the Securities  Act of 1933 (the 1933 Act).  While the
Fund's investment advisers determine the liquidity of restricted securities on a
daily basis,  the Board  oversees and retains  ultimate  responsibility  for the
adviser's  decisions.  Several  factors that the Board  considers in  monitoring
these  decisions  include the  valuation  of a  security,  the  availability  of
qualified  institutional  buyers,  and the availability of information about the
security's issuer.

     FUTURES CONTRACTS AND OPTIONS.  The Fund may enter into futures  contracts,
options,  and options on futures  contracts  for the purpose of remaining  fully
invested and reducing  transactions  costs.  Futures  contracts  provide for the
future sale by one party and purchase by another party of a specified  amount of
a specific security at a specified future time and at a specified price. Futures
contracts which are  standardized  as to maturity date and underlying  financial
instrument  are traded

                                      B-5
<PAGE>

on national futures exchanges. Futures exchanges and trading are regulated under
the Commodity Exchange Act by the Commodity Futures Trading Commission (CFTC), a
U.S. Government agency. Assets committed to futures contracts will be segregated
to the extent required by law.

     Although  futures  contracts  by their  terms call for actual  delivery  or
acceptance of the underlying securities,  in most cases the contracts are closed
out before the settlement date without the making or taking of delivery. Closing
out an open futures position is done by taking an opposite position  ("buying" a
contract which has previously  been "sold",  or "selling" a contract  previously
purchased)  in an  identical  contract  to  terminate  the  position.  Brokerage
commissions are incurred when a futures contract is bought or sold.

     Futures traders are required to make a good faith margin deposit in cash or
government  securities  with a broker or custodian to initiate and maintain open
positions  in  futures  contracts.  A  margin  deposit  is  intended  to  assure
completion of the contract  (delivery or acceptance of the underlying  security)
if it is not terminated  prior to the specified  delivery date.  Minimal initial
margin  requirements are established by the futures exchange and may be changed.
Brokers may establish  deposit  requirements  which are higher than the exchange
minimums.  Futures contracts are customarily  purchased and sold on margin which
may range upward from less than 5% of the value of the contract being traded.

     After a futures contract  position is opened,  the value of the contract is
marked to market daily. If the futures contract price changes to the extent that
the  margin  on  deposit  does  not  satisfy  margin  requirements,  payment  of
additional  "variation"  margin  will be  required.  Conversely,  change  in the
contract  value may reduce the  required  margin,  resulting  in a repayment  of
excess margin to the contract holder.  Variation margin payments are made to and
from the  futures  broker for as long as the  contract  remains  open.  The Fund
expects to earn interest income on its margin deposits.

     Traders in futures contracts may be broadly  classified as either "hedgers"
or   "speculators".   Hedgers  use  the  futures  markets  primarily  to  offset
unfavorable  changes in the value of securities  otherwise  held for  investment
purposes or expected to be acquired by them.  Speculators  are less  inclined to
own the securities  underlying the futures  contracts which they trade,  and use
futures contracts with the expectation of realizing profits from fluctuations in
the prices of underlying  securities.  The Fund intends to use futures contracts
only for bona fide hedging purposes.

     Regulations  of the CFTC  applicable  to the Fund  require  that all of its
futures  transactions  constitute bona fide hedging  transactions  except to the
extent that the aggregate initial margins and premiums required to establish any
non-hedging  positions  do not  exceed  five  percent of the value of the Fund's
portfolio.  The Fund will only sell futures  contracts to protect  securities it
owns against price declines or purchase contracts to protect against an increase
in the price of securities  it intends to purchase.  As evidence of this hedging
interest,  the Fund  expects  that  approximately  75% of its  futures  contract
purchases will be "completed", that is, equivalent amounts of related securities
will have been  purchased  or are being  purchased by the Fund upon sale of open
futures contracts.

     Although  techniques other than the sale and purchase of futures  contracts
could be used to control the Fund's exposure to market fluctuations,  the use of
futures contracts may be a more effective means of hedging this exposure.  While
the Fund will incur commission  expenses in both opening and closing out futures
positions, these costs are lower than transaction costs incurred in the purchase
and sale of the underlying securities.

     Restrictions on the Use of Futures Contracts.  The Fund will not enter into
futures contract transactions to the extent that,  immediately  thereafter,  the
sum of its initial margin  deposits on open  contracts  exceeds 5% of the market
value of the Fund's  total  assets.  In  addition,  the Fund will not enter into
futures  contracts to the extent that its  outstanding  obligations  to purchase
securities under these contracts would exceed 20% of the Fund's total assets.

     Risk Factors in Futures Transactions. Positions in futures contracts may be
closed  out only on an  exchange  which  provides  a  secondary  market for such
futures. However, there can be no

                                      B-6
<PAGE>

assurance that a liquid secondary  market will exist for any particular  futures
contract at any specific  time.  Thus, it may not be possible to close a futures
position. In the event of adverse price movements, the Fund would continue to be
required to make daily cash  payments to maintain its required  margin.  In such
situations,  if the Fund has  insufficient  cash, it may have to sell  portfolio
securities  to  meet  daily  margin  requirements  at a  time  when  it  may  be
disadvantageous to do so. In addition, the Fund may be required to make delivery
of the instruments underlying futures contracts it holds. The inability to close
options and futures  positions  also could have an adverse impact on the ability
to effectively hedge.

     The Fund  will  minimize  the risk  that it will be  unable  to close out a
futures  contract by only  entering  into  futures  which are traded on national
futures  exchanges and for which there appears to be a liquid secondary  market.
The principal  stock index futures  exchanges in the U.S. are the Board of Trade
of the City of Chicago and the Chicago Mercantile Exchange.

     The risk of loss in trading  futures  contracts in some  strategies  can be
substantial,  due to the low margin deposits required. As a result, a relatively
small  price  movement  in a  futures  contract  may  result  in  immediate  and
substantial loss (as well as gain) to the investor.  For example, if at the time
of purchase,  10% of the value of the futures contract is deposited as margin, a
subsequent  10% decrease in the value of the futures  contract would result in a
total  loss of the margin  deposit,  before any  deduction  for the  transaction
costs,  if the account  were then closed out. A 15%  decrease  would result in a
loss equal to 150% of the original  margin  deposit if the contract  were closed
out.  Thus,  a purchase  or sale of a futures  contract  may result in losses in
excess of the  amount  invested  in the  contract.  The Fund is not  subject  to
extreme  losses from futures  because 100% of the  contract  obligation  is held
separately  in cash  or  other  liquid  portfolio  securities.  The  Fund  would
presumably have sustained comparable losses if, instead of the futures contract,
it had invested in the  underlying  financial  instrument  and sold it after the
decline.

     Utilization  of futures  transactions  by the Fund does involve the risk of
imperfect or no correlation  where the securities  underlying  futures contracts
have different maturities than the portfolio securities being hedged. It is also
possible  that the Fund  could both lose  money on  futures  contracts  and also
experience  a decline in value of its  portfolio  securities.  There is also the
risk of loss by the Fund of  margin  deposits  in the event of  bankruptcy  of a
broker with whom the Fund has an open position in a futures  contract or related
option.  Additionally,  investments in futures contracts and options involve the
risk that the  investment  advisers  will  incorrectly  predict stock market and
interest rate trends.

     Most futures exchanges limit the amount of fluctuation permitted in futures
contract  prices during a single  trading day. The daily limit  establishes  the
maximum  amount that the price of a futures  contract may vary either up or down
from the previous day's settlement  price at the end of a trading session.  Once
the daily limit has been reached in a particular type of contract, no trades may
be made on that day at a price beyond that limit.  The daily limit  governs only
price  movement  during a particular  trading day and  therefore  does not limit
potential  losses,  because the limit may prevent the liquidation of unfavorable
positions.  Futures contract prices have  occasionally  moved to the daily limit
for  several  consecutive  trading  days  with  little  or no  trading,  thereby
preventing  prompt  liquidation of future  positions and subjecting some futures
traders to substantial losses.

     FEDERAL  TAX  TREATMENT  OF FUTURES  CONTRACTS.  The Fund is  required  for
federal  income tax purposes to recognize as income for each taxable  year,  its
net unrealized  gains and losses on certain  futures  contracts as of the end of
the year as well as those actually realized during the year. In these cases, any
gain or loss recognized  with respect to a futures  contract is considered to be
60%  long-term  capital  gain or loss and 40%  short-term  capital gain or loss,
without  regard to the  holding  period  of the  contract.  Gains and  losses on
certain other futures contracts  (primarily non-U.S.  futures contracts) are not
recognized  until the  contracts  are closed and are  treated  as  long-term  or
short-term  depending on the holding  period of the  contract.  Sales of futures
contracts  which  are  intended  to  hedge  against  a  change  in the  value of
securities  held by the Fund may affect the  holding  period of such  securities
and,  consequently,  the  nature  of the  gain or loss on such  securities

                                      B-7
<PAGE>

upon disposition. The Fund may be required to defer the recognition of losses on
futures  contracts to the extent of any unrecognized  gains on related positions
held by the Fund.

     In order  for the Fund to  continue  to  qualify  for  Federal  income  tax
treatment as a regulated  investment  company,  at least 90% of its gross income
for a taxable  year must be derived from  qualifying  income;  i.e.,  dividends,
interest,  income  derived  from  loans of  securities,  gains  from the sale of
securities or of foreign currencies, or other income derived with respect to the
Fund's business of investing in securities.  It is anticipated that any net gain
recognized  on  futures  contracts  will be  considered  qualifying  income  for
purposes of the 90% requirement.

     The Fund will  distribute  to  shareholders  annually any net capital gains
which  have  been   recognized  for  Federal  income  tax  purposes  on  futures
transactions.  Such distributions will be combined with distributions of capital
gains realized on the Fund's other  investments and shareholders will be advised
on the nature of the distributions.

     TEMPORARY INVESTMENTS.  The Fund may take temporary defensive measures that
are  inconsistent  with  the  Fund's  normal   fundamental  or   non-fundamental
investment  policies and  strategies  in response to adverse  market,  economic,
political, or other conditions.  Such measures could include investments in: (a)
highly  liquid  short-term  fixed-income  securities  issued  by or on behalf of
municipal or  corporate  issuers,  obligations  of the U.S.  Government  and its
agencies,  commercial  paper, and bank  certificates of deposits;  (b) shares of
other  investment  companies  which have investment  objectives  consistent with
those of the Fund; (c) repurchase agreements involving any such securities;  and
(d) other money market instruments. There is no limit on the extent to which the
Fund may take temporary  defensive measures.  In taking such measures,  the Fund
may fail to achieve its investment objective.

                       FUNDAMENTAL INVESTMENT LIMITATIONS

The Fund is subject to the following fundamental investment  limitations,  which
cannot be changed in any  material  way without the approval of the holders of a
majority of the Fund's shares. For these purposes,  a "majority" of shares means
shares  representing the lesser of: (i) 67% or more of the votes cast to approve
a change,  so long as shares  representing more than 50% of the Fund's net asset
value are present or represented  by proxy;  or (ii) more that 50% of the Fund's
net asset value.

     BORROWING. The Fund may not borrow money, except for temporary or emergency
purposes in an amount not exceeding  15% of the Fund's net assets.  The Fund may
borrow  money  through  banks,  reverse  repurchase  agreements,  or  Vanguard's
interfund  lending program only, and must comply with all applicable  regulatory
conditions.  The  Fund  may not make any  additional  investments  whenever  its
outstanding borrowings exceed 5% of net assets.

     COMMODITIES.  The Fund may not invest in  commodities,  except  that it may
invest  in stock  futures  contracts  and  options.  No more that 5% of the Fund
assets may be used as initial margin deposit for futures contracts,  and no more
that 20% of the Fund's  assets may be invested  in stock  futures  contracts  or
options at any time.

     DIVERSIFICATION. With respect to 75% of its total assets, the Fund may not:
(i)  purchase  more than 10% of the  outstanding  voting  securities  of any one
issuer, or (ii) purchase  securities of any issuer if, as a result, more than 5%
of the Fund's total assets would be invested in that issuer's  securities.  This
limitation  does not apply to obligations of the United States  Government,  its
agencies, or instrumentalities.

     ILLIQUID OR  RESTRICTED  SECURITIES.  The Fund may not acquire any security
if, as a result, more than 15% of its net assets would be invested in securities
that are illiquid.

     INDUSTRY CONCENTRATION.  The Fund may not invest more that 25% of its total
assets in any one industry.

     INVESTING FOR CONTROL. The Fund may not invest in a company for the purpose
of controlling its management.

                                      B-8
<PAGE>

     INVESTMENT  COMPANIES.  The Fund may not  invest  in any  other  investment
company, except through a merger,  consolidation or acquisition of assets, or to
the extent permitted by Section 12 of the 1940 Act.  Investment  companies whose
shares the Fund acquires pursuant to Section 12 must have investment  objectives
and investment policies consistent with those of the Fund.

     LOANS.  The Fund may not lend  money to any  person  except  by  purchasing
fixed-income  securities or by entering into repurchase  agreements,  or through
Vanguard's interfund lending program by lending its portfolio securities.

     MARGIN.  The Fund may not purchase  securities on margin or sell securities
short,  except as  permitted  by the  Trust's  investment  policies  relating to
commodities.

     PLEDGING  ASSETS.  The Fund may not pledge,  mortgage,  or hypothecate more
that 15% of its net assets.

     REAL ESTATE.  The Fund may not invest directly in real estate,  although it
may invest in  securities  of companies  that deal in real estate,  or interests
therein.

     SENIOR  SECURITIES.  The Fund may not issue  senior  securities,  except in
compliance with the 1940 Act.

     UNDERWRITING.  The Fund may not  engage  in the  business  of  underwriting
securities  issued  by  other  persons.  The  Fund  will  not be  considered  an
underwriter when disposing of its investment securities.

     The  investment  limitations  set forth  above are  considered  at the time
investment securities are purchased.  If a percentage  restriction is adhered to
at the time the  investment is made, a later  increase in  percentage  resulting
from a change in the market  value of assets will not  constitute a violation of
such restriction.

     None of these  limitations  prevents  the Fund  from  participating  in The
Vanguard Group.  As a member of The Vanguard Group,  the Fund may own securities
issued by Vanguard,  make loans to Vanguard,  and contribute to Vanguard's costs
or  other  financial  requirements.  See  "Management  of  the  Fund"  for  more
information.

                               PURCHASE OF SHARES

The Fund reserves the right in its sole  discretion (i) to suspend the offerings
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.

TRADING SHARES THROUGH CHARLES SCHWAB

The Fund has  authorized  Charles  Schwab & Co., Inc.  (Schwab) to accept on its
behalf purchase and redemption orders under certain terms and conditions. Schwab
is also  authorized to designate  other  intermediaries  to accept  purchase and
redemption  orders on the Fund's behalf  subject to those terms and  conditions.
Under this  arrangement,  the Fund will be deemed to have received a purchase or
redemption order when Schwab or, if applicable,  Schwab's  authorized  designee,
accepts the order in accordance  with the Fund's  instructions.  Customer orders
that are properly transmitted to the Fund by Schwab, or if applicable,  Schwab's
authorized designee, will be priced as follows:

     Orders  received by Schwab before 3 p.m.  Eastern time on any business day,
will be sent to  Vanguard  that day and your  share  price  will be based on the
Fund's  net asset  value  calculated  at the close of trading  that day.  Orders
received by Schwab after 3 p.m.  Eastern  time,  will be sent to Vanguard on the
following  business  day and your  share  price  will be based on the Fund's net
asset value calculated at the close of trading that day.

                                      B-9
<PAGE>


                              REDEMPTION OF SHARES

The Fund may suspend  redemption  privileges or postpone the date of payment (i)
during any period that the New York Stock Exchange (the 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  Commission  as a
result of which it is not  reasonably  practicable  for the Fund to  dispose  of
securities  owned by it, or fairly to  determine  the value of its  assets,  and
(iii) for such other periods as the Commission may permit.

     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.

     No charge is made by the Fund for redemptions. Shares redeemed may be worth
more or less than what was paid for them,  depending  on the market value of the
securities held by the Fund.

                                  SHARE PRICE

The Fund's  share  price,  or "net asset  value" per  share,  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
Exchange  (generally  4:00 p.m.  Eastern  time) on each day that the Exchange is
open for trading.

     Portfolio  securities  for which market  quotations  are readily  available
(which include those securities listed on national securities exchanges, as well
as those  quoted on the NASDAQ  Stock  Market) will be valued at the last quoted
sales price on the day the  valuation  is made.  Such  securities  which are not
traded on the  valuation  date are valued at the mean of the bid and ask prices.
Price information on exchange-listed securities is taken from the exchange where
the  security  is  primarily  traded.  Securities  may be valued on the basis of
prices  provided by a pricing  service  when such prices are believed to reflect
the fair market value of such securities.

     Short term instruments (those acquired with remaining maturities of 60 days
or less) may be valued at cost, plus or minus any amortized discount or premium,
which approximates market value.

     Bonds  and  other  fixed-income  securities  may be  valued on the basis of
prices  provided by a pricing  service  when such prices are believed to reflect
the fair  market  value of such  securities.  The prices  provided  by a pricing
service  may be  determined  without  regard to bid or last sale  prices of each
security,  but take into  account  institutional-size  transactions  in  similar
groups of securities as well as any developments related to specific securities.

     Foreign securities are valued at the last quoted sales price,  according to
the broadest and most representative  market,  available at the time the Fund is
valued.  If events which  materially  affect the value of the Fund's  investment
occur after the close of the  securities  markets on which such  securities  are
primarily  traded,  those investments may be valued by such methods as the Board
of Trustees deems in good faith to reflect fair value.

     In  determining  the  Fund's  net asset  value per  share,  all  assets and
liabilities  initially  expressed in foreign  currencies  will be converted into
U.S.  dollars using the  officially  quoted daily  exchange rates used by Morgan
Stanley Capital  International in calculating various benchmarking indices. This
officially quoted exchange rate may be determined prior to or after the close of
a particular  securities market. If such quotations are not available,  the rate
of exchange will be determined in accordance  with policies  established in good
faith by the Board of Trustees.

     Other assets and securities  for which no quotations are readily  available
or which are restricted as to sale (or resale) are valued by such methods as the
Board of Trustees deems in good faith to reflect the fair value.

                                      B-10
<PAGE>

                             MANAGEMENT OF THE FUND

OFFICERS AND TRUSTEES

The officers of the Fund manage its day-to-day operations and are responsible to
the Fund's Board of Trustees.  The Trustees set broad  policies for the Fund and
choose its officers. The following is a list of the Trustees and officers of the
Fund and a statement of their present positions and principal occupations during
the past five years. As a group,  the Fund's Trustees and officers own less than
1% of the outstanding shares of the Fund. Each Trustee also serves as a Director
of The  Vanguard  Group,  Inc.,  and as a  Trustee  of  each  of the  103  funds
administered  by Vanguard (102 in the case of Mr.  Malkiel and 93 in the case of
Mr.  MacLaury).  The mailing address of the Trustees and officers of the Fund is
Post Office Box 876, Valley Forge, PA 19482.

JOHN J. BRENNAN, (DOB: 7/29/1954) Chairman, Chief Executive Officer & Trustee*
Chairman,  Chief Executive Officer and Director of The Vanguard Group, Inc., and
Trustee of each of the investment companies in The Vanguard Group.

JOANN HEFFERNAN HEISEN, (DOB: 1/25/1950) Trustee
Vice President, Chief Information Officer, and member of the Executive Committee
of Johnson and Johnson (Pharmaceuticals/Consumer  Products), Director of Johnson
& Johnson*MERCK  Consumer  Pharmaceuticals Co., The Medical Center at Princeton,
and Women's Research and Education Institute.

BRUCE K. MACLAURY, (DOB: 5/7/1931) Trustee
President  Emeritus  of  The  Brookings  Institution  (Independent  Non-Partisan
Research  Organization);  Director of American  Express Bank, Ltd., The St. Paul
Companies, Inc. (Insurance and Financial Services), and National Steel Corp.

BURTON G. MALKIEL, (DOB: 8/28/1932) Trustee
Chemical Bank Chairman's Professor of Economics, Princeton University;  Director
of Prudential Insurance Co. of America, Banco Bilbao Gestinova, Baker Fentress &
Co.  (Investment  Management),  The Jeffrey Co.  (Holding  Company),  and Select
Sector SPDR Trust (Exchange-Traded Mutual Fund).

ALFRED M. RANKIN, JR., (DOB: 10/8/1941) Trustee
Chairman,  President, Chief Executive Officer, and Director of NACCO Industries,
Inc. (Machinery/Coal/  Appliances); and Director of The BFGoodrich Co. (Aircraft
Systems/Manufacturing/Chemicals).

JOHN C. SAWHILL, (DOB: 6/12/1936) Trustee
President  and Chief  Executive  Officer of The Nature  Conservancy  (Non-Profit
Conservation Group);  Director of Pacific Gas and Electric Co., Procter & Gamble
Co.,   NACCO   Industries,   Inc.   (Machinery/Coal/Appliances),   and  Newfield
Exploration Co.  (Energy);  formerly,  Director and Senior Partner of McKinsey &
Co., and President of New York University.

JAMES O. WELCH, JR., (DOB: 5/13/1931) Trustee
Retired Chairman of Nabisco Brands, Inc. (Food Products);  retired Vice Chairman
and  Director  of RJR  Nabisco  (Food and  Tobacco  Products);  Director of TECO
Energy, Inc., and Kmart Corp.

J. LAWRENCE WILSON, (DOB: 3/2/1936) Trustee
Retired Chairman of Rohm & Haas Co. (Chemicals);  Director of Cummins Engine Co.
(Diesel Engine Company), The Mead Corp. (Paper Products), and AmeriSource Health
Corp.; and Trustee of Vanderbilt University.

RAYMOND J. KLAPINSKY, (DOB: 12/7/1938) Secretary*
Managing Director of The Vanguard Group, Inc.;  Secretary of The Vanguard Group,
Inc. and of each of the investment companies in The Vanguard Group.

THOMAS J. HIGGINS, (DOB: 5/21/1957) Treasurer*
Principal  of The Vanguard  Group,  Inc.;  Treasurer  of each of the  investment
companies in The Vanguard Group.

                                      B-11
<PAGE>

ROBERT D. SNOWDEN, (DOB: 9/4/1961) Controller*
Principal of The Vanguard  Group,  Inc.;  Controller  of each of the  investment
companies in The Vanguard Group.

*Officers of the Fund are "interested persons" as defined in the 1940 Act.

THE VANGUARD GROUP

The Fund is a  member  of The  Vanguard  Group of  Investment  Companies,  which
consists of more than 100 funds.  Through their  jointly-owned  subsidiary,  The
Vanguard Group, Inc. (Vanguard),  the Trust and the other Trusts in The Vanguard
Group   obtain   at  cost   virtually   all  of  their   corporate   management,
administrative,  and distribution  services.  Vanguard also provides  investment
advisory services on an at-cost basis to certain Vanguard funds.

     Vanguard  employs  a  supporting  staff of  management  and  administrative
personnel  needed  to  provide  the  requisite  services  to the  funds and also
furnishes the funds with  necessary  office space,  furnishings,  and equipment.
Each fund pays its share of Vanguard's  total expenses which are allocated among
the funds under  methods  approved  by the Board of  Trustees  of each fund.  In
addition,  each fund bears its own direct expenses such as legal,  auditing, and
custodian fees.

     The funds' 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 and the Fund's  advisers have adopted Codes of Ethics  designed to
prevent employees who may have access to nonpublic information about the trading
activities of the Fund (access  persons) from profiting  from that  information.
The Codes permit access  persons to invest in securities for their own accounts,
including  securities  that may be held by the Fund, but place  substantive  and
procedural  restrictions  on their trading  activities.  For example,  the Codes
require that access persons receive advance  approval for every securities trade
to ensure that there is no conflict with the trading activities of the Fund.

     Vanguard was  established and operates under an Amended and Restated Funds'
Service  Agreement which was approved by the  shareholders of each of the funds.
The amounts  which each of the funds has invested are adjusted from time to time
in order to maintain the proportionate relationship between each funds' relative
net assets and its contribution to Vanguard's capital.  The Amended and Restated
Funds'  Service  Agreement  provides as follows:  (a) each  Vanguard fund may be
called upon to invest up to 0.40% of its  current  assets in  Vanguard,  and (b)
there is no other  limitation  on the dollar  amount that each Vanguard fund may
contribute to Vanguard's capitalization. At December 31, 1999, the Morgan Growth
Fund had contributed capital of $931,000 to Vanguard,  representing 0.02% of the
Fund's net assets and 0.9% of Vanguard's capitalization.

     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.

     DISTRIBUTION.  Vanguard Marketing Corporation, a wholly-owned subsidiary of
The Vanguard Group, Inc., provides all distribution and marketing activities for
the funds in the Group. 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 Vanguard. The Trustees 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  Vanguard  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 funds aggregate quarterly rate of
contribution  for  distribution  expenses of a marketing and promotional  nature
shall exceed 125% of

                                      B-12
<PAGE>

average  distribution  expense rate for  Vanguard,  and that no fund shall incur
annual distribution  expenses in excess of 20/100 of 1% of its average month-end
net assets.

     During the fiscal years ended  December 31, 1997,  1998, and 1999, the Fund
incurred the following  approximate  amounts of The Vanguard Group's  management
(including transfer agency)  distribution,  and marketing expenses:  $7,362,000,
$9,220,000, and $12,351,000, respectively.

INVESTMENT ADVISORY SERVICES

     Vanguard also provides the fund with investment  advisory  services.  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.

TRUSTEES COMPENSATION

The  same  individuals  serve  as  Trustees  of all  Vanguard  funds  (with  two
exceptions,  which are noted in the table appearing on page B-14), and each fund
pays a proportionate share of the Trustees' compensation. The funds employ their
officers on a shared  basis,  as well.  However,  officers  are  compensated  by
Vanguard, not the funds.

     INDEPENDENT TRUSTEE. The funds compensate their independent  Trustees--that
is, the ones who are not also officers of the Fund--in three ways:

 .    The  independent  Trustees  receive an annual fee for their  service to the
     funds, which is subject to reduction based on absences from scheduled Board
     meetings.

 .    The  independent  Trustees are reimbursed for the travel and other expenses
     that they incur in attending Board meetings.

 .    Upon retirement,  the independent  Trustees receive an aggregate annual fee
     of  $1,000  for each year  served  on the  Board,  up to  fifteen  years of
     service.  This annual fee is paid for ten years  following  retirement,  or
     until each Trustee's death.

     "INTERESTED"  TRUSTEE.  Mr. Brennan serves as a Trustee, but is not paid in
this  capacity.  He is,  however,  paid in his role as officer  of The  Vanguard
Group, Inc.

     COMPENSATION TABLE. The following table provides  compensation  details for
each of the Trustees.  We list the amounts paid as  compensation  and accrued as
retirement benefits by the Fund for each Trustee.  In addition,  the table shows
the total  amount of benefits  that we expect each  Trustee to receive  from all
Vanguard funds upon  retirement,  and the total amount of  compensation  paid to
each Trustee by all Vanguard funds.

                                      B-13
<PAGE>

                           VANGUARD MORGAN GROWTH FUND
                          TRUSTEES' COMPENSATION TABLE

<TABLE>
<CAPTION>
<S>                   <C>               <C>                <C>                <C>
                                           PENSION OR                               TOTAL
                                           RETIREMENT                           COMPENSATION
                          AGGREGATE     BENEFITS ACCRUED   ESTIMATED ANNUAL   FROM ALL VANGUARD
                        COMPENSATION    AS PART OF THIS     BENEFITS UPON       FUNDS PAID TO
  NAMES OF TRUSTEES   FROM THIS FUND(1) FUND'S EXPENSES(1)    RETIREMENT         TRUSTEES(2)
- ------------------------------------------------------------------------------------------------
John C. Bogle(3)             None               None               None                None
John J. Brennan              None               None               None                None
JoAnn Heffernan Heisen       $778                $43            $15,000             $80,000
Bruce K. MacLaury            $808                $72            $12,000             $75,000
Burton G. Malkiel            $784                $71            $15,000             $80,000
Alfred M. Rankin, Jr.        $778                $52            $15,000             $80,000
John C. Sawhill              $778                $66            $15,000             $80,000
James O. Welch, Jr.          $778                $76            $15,000             $80,000
J. Lawrence Wilson           $778                $55            $15,000             $80,000
</TABLE>
(1)  The amounts  shown in this column are based on the Fund's fiscal year ended
     December 31, 1999.
(2)  The amounts reported in this column reflect the total  compensation paid to
     each  Trustee  for his or her  service  as Trustee of 103 funds (102 in the
     case of Mr. Malkiel;  93 in the case of Mr. MacLaury) for the 1999 calendar
     year.
(3)  Mr. Bogle retired from the funds' Board, effective December 31, 1999.

                          INVESTMENT ADVISORY SERVICES

The Fund currently uses three separate investment advisers, each of whom manages
the  investment  and  reinvestment  of a portion of the Vanguard  Morgan  Growth
Fund's assets. Prior to April 24, 1990,  Wellington Management Company served as
the Fund's sole investment adviser.

     WELLINGTON  MANAGEMENT COMPANY, LLP. The Fund employs Wellington Management
Company,  LLP (Wellington  Management) under an investment advisory agreement to
manage the investment and reinvestment of a portion of the Fund's assets, and to
continuously  review,  supervise,  and administer the Fund's investment program.
Wellington Management discharges its responsibilities  subject to the control of
the officers and Trustees of the Fund.  Wellington Management is a Massachusetts
limited  liability  partnership,  and the  following  persons  serve as managing
partners of Wellington Management:  Laurie A. Gabriel, Duncan M. McFarland,  and
John R. Ryan.  Wellington  Management  and its  predecessor  organizations  have
provided investment advisory services to investment  companies since 1928 and to
investment counseling clients since 1960. Robert D. Rands, Senior Vice President
of  Wellington  Management,  has served as  portfolio  manager of the Fund since
1994.

     The Fund pays  Wellington  Management a Basic Fee at the end of each fiscal
quarter,  calculated by applying a quarterly rate, based on the following annual
percentage  rates,  to the  Trust's  average  month-end  net  assets  managed by
Wellington Management for the quarter:

NET ASSETS                            ANNUAL RATE
- ----------                            -----------
First $100 million...................    0.175%
Next $500 million....................    0.100%
Over $1 billion......................    0.075%

     The Basic Fee may be increased or decreased by applying an adjustment based
on the  investment  performance  of the assets of the Fund managed by Wellington
Management relative to the investment record of The Growth Fund Stock Index (the
Index), which is described on page B-21.

                                      B-14
<PAGE>

     The following table sets forth the adjustment  rates payable by the Fund to
Wellington Management under the investment advisory agreement:

CUMULATIVE 36-MONTH PERFORMANCE          PERFORMANCE FEE
VERSUS THE GROWTH FUND STOCK INDEX       ADJUSTMENT
- ----------------------------------       ----------
Less than -12%....................       -0.50 x Basic Fee
Between -12% and -6%..............       -0.25 x Basic Fee
Between -6% and 6%................        0.00 x Basic Fee
Between 6% and 12%................       +0.25 x Basic Fee
More than 12%.....................       +0.50 x Basic Fee

     For  the  purpose  of   determining   the  fee  adjustment  for  investment
performance,  as described  above,  the net assets of the Wellington  Management
Portfolio  shall be averaged over the same period as the investment  performance
of the Wellington  Management  Portfolio and the investment record of the Growth
Fund Stock Index are computed.  The  investment  performance  of the  Wellington
Management  Portfolio  for  such  period,  expressed  as  a  percentage  of  the
Wellington Management  Portfolio's net asset value per share at the beginning of
such period,  shall be the sum of: (i) the change in the  Wellington  Management
Portfolio's net asset value per share during such period;  (ii) the value of the
Wellington  Management  Portfolio's  cash  distributions  per  share  having  an
ex-dividend date occurring within such period; and (iii) the per share amount of
capital  gains  taxes  paid or  accrued  during  such  period by the  Wellington
Management Portfolio for undistributed realized long-term capital gains.

     The  investment  record of the  Growth  Fund  Stock  Index for any  period,
expressed as a percentage  of the Growth Fund Stock Index level at the beginning
of such  period,  shall be the sum of (i) the  change in the level of the Growth
Fund Stock Index  during such period and (ii) the value,  computed  consistently
with the Growth Fund Stock Index,  of cash  distributions  having an ex-dividend
date occurring  within such period made by companies whose  securities  comprise
the Growth Fund Stock Index. The foregoing  notwithstanding,  any computation of
the  investment  performance  of the  Wellington  Management  Portfolio  and the
investment record of the Growth Fund Stock Index shall be in accordance with any
then applicable rules of the Commission.

     DURATION AND TERMINATION.  The current agreement with Wellington Management
is renewable  for  successive  one-year  periods only so long as such renewal is
approved at least annually by a vote of the Trust's Board of Trustees, including
the  affirmative  votes of a majority of the Trustees who are not parties to the
contract or "interested persons" (as defined in the 1940 Act) of any such party,
cast in person at a meeting called for the purpose of considering such approval.
The agreement is  automatically  terminated  if assigned,  and may be terminated
without  penalty at any time  either (1) by vote of the Board of Trustees of the
Trust on sixty (60) days'  written  notice to Wellington  Management,  or (2) by
Wellington Management upon ninety (90) days' written notice to the Trust.

     RELATED  INFORMATION   CONCERNING   WELLINGTON   MANAGEMENT  COMPANY,  LLP.
Wellington  Management,  75 State Street,  Boston,  MA 02109,  is a professional
investment  counseling  firm which  provides  investment  services to investment
companies,  other institutions and individuals.  Among the clients of Wellington
Management  are more than  fifteen of the  investment  companies of The Vanguard
Group.  Wellington  Management and its predecessor  organizations  have provided
investment  advisory  services  to  investment   companies  since  1928  and  to
investment counseling clients since 1960.

                                      B-15
<PAGE>

  During the last three fiscal years, the Fund paid the following advisory fees,
to Wellington Management:

                                             1997          1998           1999
                                             ----          ----           ----
Basic Fee..........................    $1,292,417    $1,541,922     $1,830,546
Increase or Decrease for Performance
 Adjustment........................       (63,493)       76,371        378,563
                                       ----------    ----------     ----------
Total..............................    $1,228,924    $1,618,293     $2,209,110

     FRANKLIN  PORTFOLIO  ASSOCIATES,  LLC. The Fund employs Franklin  Portfolio
Associates,  LLC under an investment advisory agreement to manage the investment
and  reinvestment  of  a  portion  of  the  Fund's  assets.  Franklin  Portfolio
Associates  discharges  its  responsibilities  subject  to  the  control  of the
officers and Trustees of the Fund.

     The Fund pays Franklin Portfolio  Associates a Basic Fee at the end of each
fiscal quarter,  calculated by applying a quarterly rate, based on the following
annual percentage rates, to the average month-end net assets managed by Franklin
Portfolio Associates for the quarter:

NET ASSETS                           ANNUAL RATE
- ----------                           -----------
First $100 million................      0.25%
Next $200 million.................      0.20%
Next $200 million.................      0.15%
Next $200 million.................      0.10%
Next $4 billion...................      0.08%
Over $5 billion...................      0.06%

     The Basic Fee may be increased or decreased by applying an Adjustment based
on the  investment  performance  of the assets of the Fund  managed by  Franklin
Portfolio  Associates  (the  "Franklin  Portfolio")  relative to the  investment
record of the Index. The Adjustment is calculated as follows:

CUMULATIVE 36-MONTH
PERFORMANCE VS. THE INDEX              ADJUSTMENT
- -------------------------              ----------
+6% or more........................    +80% of Basic Fee
+3% to +6%.........................    +40% of Basic Fee
- -3% to +3..........................            0
- -3% to -6%.........................    -40% of Basic Fee
Less than -6%......................    -80% of Basic Fee

     For purposes of determining the Adjustment,  the net assets of the Franklin
Portfolio  will be averaged over the same period used to compute the  investment
performance of the Franklin Portfolio and the investment record of the Index. In
addition, the investment  performance of the Franklin Portfolio,  the unit value
of the  Franklin  Portfolio,  and the  investment  record of the  Index  will be
calculated  in the same  manner as set  forth in the  discussion  of  Wellington
Management's advisory fees.

                                      B-16
<PAGE>

     TRANSITION RULE. The Adjustment  schedule set forth above will not be fully
operable until April 30, 2001. Until that date, a transition schedule consisting
of varying  percentages  of the above  Adjustment  schedule and a prior schedule
will be used. For each fiscal quarter included in the 36 months beginning May 1,
1998,  the  incentive/penalty  fee  will  be  calculated  as the sum of a and b,
whereby:

     a = # of months elapsed since 5/1/1998  X  the Adjustment calculated
         ----------------------------------     under the current schedule
                     36 months

     b = # of months remaining until 5/30/2001  X  the Adjustment calculated
         -------------------------------------     under the prior schedule
                     36 months

     The current agreement with Franklin  Portfolio  Associates is renewable for
successive  one year  periods  only so long as such renewal is approved at least
annually by a vote of the Fund's Board of Trustees,  including  the  affirmative
votes of a majority  of the  Trustees  who are not  parties to the  contract  or
"interested  persons"  (as defined in the 1940 Act) of any such  party,  cast in
person at a meeting  called for the purpose of considering  such  approval.  The
agreement  may be terminated  without  penalty at any time either (1) by vote of
the  Board of  Trustees  of the  Fund on 60 days'  written  notice  to  Franklin
Portfolio  Associates,  or (2) by Franklin  Portfolio  Associates  upon 90 days'
written notice to the Fund.

     During  the last  three  fiscal  years,  the Fund paid  Franklin  Portfolio
Associates the following advisory fees:

                                              1997         1998          1999
                                              ----         ----          ----
Basic Fee............................   $1,310,220   $1,701,152    $1,981,731
Increase or Decrease for Performance
 Adjustment..........................      571,862      383,794      (212,101)
                                        ----------   ----------    ----------
Total................................   $1,882,082   $2,084,946    $1,769,630

     RELATED INFORMATION CONCERNING FRANKLIN PORTFOLIO ASSOCIATES, LLC. Franklin
Portfolio  Associates,  Two  International  Place,  Boston,  MA 02110.  Franklin
Portfolio Associates is a Massachusetts  limited liability company,  which is an
indirect,  wholly-owned  subsidiary  of MBC  Investments  Corporation,  which is
itself a wholly-owned subsidiary of Mellon Bank Corporation.  Franklin Portfolio
Associates is a professional investment counseling firm which specializes in the
management  of common  stock funds  through the use of  quantitative  investment
models.  As  of  December  31,  1999,  Franklin  Portfolio  Associates  provided
investment  advisory  services  with respect to  approximately  $21.4 billion of
client  assets,  including  approximately  $8.8 billion for Vanguard  Growth and
Income Fund, another mutual fund member of The Vanguard Group.

     THE  VANGUARD  GROUP.  The  Vanguard  Group  provides  investment  advisory
services  on an at cost basis  with  respect to 14% of  Vanguard  Morgan  Growth
Fund's assets as of December 31, 1999. The remaining 5% of the Fund's assets are
held in cash  reserves  and are also  managed by  Vanguard.  Vanguard  employs a
quantitative investment approach that uses computer techniques to track--and, if
possible,  outperform--a  specific market standard. For Morgan Growth Fund, this
market  standard is the Growth Fund Stock Index,  which is made up of the stocks
held by the nation's 50 largest growth funds.

     For the fiscal  years ended  December  31,  1997,  1998 and 1999,  the Fund
incurred  advisory  fees owed to Vanguard of $219,000,  $317,000,  and $500,000,
respectively.

                                      B-17
<PAGE>

                             PORTFOLIO TRANSACTIONS

The investment advisory agreements  authorize the advisers (with the approval of
the Fund's Board of Trustees) to select the brokers or dealers that will execute
the purchases  and sales of  securities  for the Fund and direct the Advisers to
use their best  efforts to obtain the best  available  price and most  favorable
execution as to all  transactions  for the Fund. The Advisers have 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.  During the fiscal years ended December 31, 1997, 1998, and 1999,
the Fund paid $3,104,030,  $4,313,385, and $3,752,229 respectively, in brokerage
commissions.

     In  placing  portfolio  transactions,  the  Advisers  will use  their  best
judgment to choose the broker most capable of providing the  brokerage  services
necessary to obtain the 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 Advisers.  The Advisers consider such information  useful in the
performance of their obligations under the agreement but are unable to determine
the amount by which such services may reduce its expenses.

     The investment advisory agreements also incorporate the concepts of Section
28(e) of the Securities  Exchange Act of 1934 by providing that,  subject to the
approval of the Trust's  Board of  Trustees,  the Advisers 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 Advisers to the Fund and the other Trusts in the Group.

     Currently,  it is the  Fund's  policy  that the  Advisers  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  Advisers  will  only pay such  higher
commissions  if they believe 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 Advisers and/ or the Fund. However, the
Advisers  have  informed  the Trust  that  they  generally  will not pay  higher
commission rates specifically for the purpose of obtaining research services.

     Some  securities  considered  for  investment  by  the  Fund  may  also  be
appropriate  for other funds and/or clients served by the Advisers.  If purchase
or sale of securities  consistent  with the investment  policies of the Fund and
one or more of these  other  funds  or  clients  serviced  by the  Advisers  are
considered at or about the same time,  transactions  in such  securities will be
allocated  among the several funds and clients in a manner  deemed  equitable by
the Advisers.

                             YIELD AND TOTAL RETURN

The yield of the Fund for the 30-day period ended December 31, 1999 was 0.60%.

     The  average  annual  total  return  of the Fund for the one-,  five-,  and
ten-year  periods  ending  December  31,  1999 was 34.10%,  29.17%,  and 18.14%,
respectively.

AVERAGE ANNUAL TOTAL RETURN

Average annual total return is the average annual  compounded rate of return for
the periods of one year,  five years,  ten years,  or the life of the Fund,  all
ended on the last day of a recent month.  Average annual total return quotations
will reflect changes in the price of the Fund's shares and

                                      B-18
<PAGE>

assume that all dividends and capital gains distributions during the respective
periods were reinvested in Fund shares.

     Average  annual total return is  calculated  by finding the average  annual
compounded  rates of  return of a  hypothetical  investment  over  such  periods
according  to the  following  formula  (average  annual  total  return  is  then
expressed as a percentage):

                               T = (ERV/P)1/N - 1

  Where:

          T   = average annual total return.
          P   = a hypothetical initial investment of $1,000.
          n   = number of years.
          ERV = ending redeemable value: ERV is the value, at the end
                of the applicable period, of a hypothetical $1,000
                investment made at the beginning of the applicable
                period

AVERAGE ANNUAL AFTER-TAX TOTAL RETURN QUOTATION

We calculate the Fund's  average  annual  after-tax  total return by finding the
average annual  compounded  rate of return over the 1-, 5-, and 10-year  periods
(or for periods of the Fund's  operations)  that would equate the initial amount
invested to the after-tax value, according to the following formulas:

After-tax return:

                                 P (1+T)N = ATV
  Where:

          P   = a hypothetical initial payment of $1,000
          T   = average annual after-tax total return
          n   = number of years
          ATV = after-tax value at the end of the 1-, 5-, or 10-year
                periods of a hypothetical $1,000 payment made at the
                beginning of the time period, assuming no liquidation
                of the investment at the end of the measurement
                periods.
Instructions.

1.   Assume all distributions by the Fund are  reinvested--less the taxes due on
     such  distributions--at  the price on the  reinvestment  dates  during  the
     period.  Adjustments  may be made for  subsequent  re-characterizations  of
     distributions.

2.   Calculate  the  taxes  due on  distributions  by the Fund by  applying  the
     highest federal  marginal tax rates to each component of the  distributions
     on the reinvestment date (e.g.,  ordinary income,  short-term capital gain,
     long-term  capital gain,  etc.).  For periods after  December 31, 1997, the
     federal marginal tax rates used for the calculations are 39.6% for ordinary
     income and  short-term  capital gains and 20% for long-term  capital gains.
     Note that the  applicable tax rates may vary over the  measurement  period.
     Assume no taxes are due on the portions of any distributions  classified as
     exempt  interest  or  non-taxable  (i.e.,  return of  capital).  Ignore any
     potential tax liabilities other than federal tax liabilities  (e.g.,  state
     and local taxes).

3.   Include all recurring  fees that are charged to all  shareholder  accounts.
     For any  account  fees that vary  with the size of the  account,  assume an
     account size equal to the Fund's mean (or median) account size. Assume that
     no  additional  taxes or tax credits  result from any  redemption of shares
     required to pay such fees.

4.   State the total return quotation to the nearest hundredth of one percent.

                                      B-19
<PAGE>

CUMULATIVE TOTAL RETURN

Cumulative  total  return is the  cumulative  rate of  return on a  hypothetical
initial  investment of $1,000 for a specified  period.  Cumulative  total return
quotations reflect changes in the price of the Fund's shares and assume that all
dividends and capital gains  distributions  during the period were reinvested in
Fund shares.  Cumulative  total return is calculated  by finding the  cumulative
rates of a return of a hypothetical  investment over such periods,  according to
the  following  formula   (cumulative  total  return  is  then  expressed  as  a
percentage):
                                 C = (ERV/P) - 1
  Where:

          C   = cumulative total return
          P   = a hypothetical initial investment of $1,000
          ERV = ending redeemable value: ERV is the value, at the end
                of the applicable period, of a hypothetical $1,000
                investment made at the beginning of the applicable
                period

SEC YIELDS

Yield is the net  annualized  yield based on a  specified  30-day (or one month)
period  assuming  semiannual  compounding  of  income.  Yield is  calculated  by
dividing the net  investment  income per share  earned  during the period by the
maximum offering price per share on the last day of the period, according to the
following formula:

                          YIELD = 2[((A-B)/CD+1)6 - 1]

  Where:
          a  = dividends and interest earned during the period.
          b  = expenses accrued for the period (net of
               reimbursements).
          c  = the average daily number of shares outstanding during
               the period that were entitled to receive dividends.
          d  = the maximum offering price per share on the last day of
               the period.

                              PERFORMANCE MEASURES

There are a number of  different  ways to measure  the  performance  of a mutual
fund. One of these methods is to calculate the current yield of a fund.  This is
done by dividing the total  amount of dividends  per share paid by a fund during
the past twelve months by a current  offering price (including the sales charge,
if any). Under certain circumstances,  such as when there has been a fundamental
change in investment or dividend policies,  it might be appropriate to annualize
the dividends  paid over the period such  policies  were in effect,  rather than
using the dividends paid during the past twelve months.  An alternate  method is
to calculate a compound yield. This is derived by computing the total compounded
dividends  paid by a fund during the past twelve months on the  assumption  that
all dividends  were  reinvested  in  additional  shares (and giving no effect to
capital gains  distributions  or taxes) and dividing this by a current  offering
price. Another method is to calculate the total return by dividing the change in
value of an investment in shares over a period of time  (generally  ten years or
more),   assuming  the   reinvestment   of  all   dividends  and  capital  gains
distributions,  by the original net asset value of the shares. Regardless of the
method used, past  performance is not necessarily  indicative of future results,
but is an  indication  of the  return  to  shareholders  only  for  the  limited
historical period used.

     From  time to time,  advertisements,  reports  and  promotional  literature
regarding the Fund may compare its yield or total return (as  calculated  above)
to yields or returns  reported by other  investments  and to various indexes and
averages to assist an  investor's  calculation  of how an investment in the Fund
might satisfy his investment objectives.

                                      B-20
<PAGE>

                              COMPARATIVE INDEXES

Each of the investment company members of The Vanguard Group, including Vanguard
Morgan  Growth Fund,  may,  from time to time,  use one or more of the following
unmanaged indexes for comparative performance purposes.

GROWTH FUND STOCK INDEX--The Index is composed of the various common stocks that
are held in the 50 largest growth stock mutual funds, using year-end net assets,
monitored by  Morningstar,  Inc. Under an agreement with the Fund,  Morningstar,
Inc.  develops the  composition  of the Index and its total return each quarter.
Neither The Vanguard Group, Inc., Wellington Management,  nor Franklin Portfolio
Associates are affiliated with Morningstar in any way.

STANDARD & POOR'S 500 COMPOSITE STOCK PRICE INDEX--contains the stocks of 500 of
the largest domestic companies.

STANDARD & POOR'S  MIDCAP 400  INDEX--is  composed of 400 medium sized  domestic
stocks.

STANDARD & POOR'S 500/BARRA VALUE INDEX--includes  stocks selected by Standard &
Poor's Index Committee to include leading companies in leading industries and to
reflect the U.S. stock market.

STANDARD & POOR'S  SMALLCAP  600/BARRA VALUE  INDEX--contains  stocks of the S&P
SmallCap 600 Index which have a lower than average price-to-book ratio.

STANDARD & POOR'S SMALLCAP  600/BARRA GROWTH  INDEX--contains  stocks of the S&P
SmallCap 600 Index which have a higher than average price-to-book ratio.

RUSSELL  1000  VALUE  INDEX--consists  of the stocks in the  Russell  1000 Index
(comprising  the 1,000  largest  U.S.-based  companies  measured by total market
capitalization)  with the lowest  price-to-book  ratios,  comprising  50% of the
market capitalization of the Russell 1000.

WILSHIRE  5000 TOTAL MARKET  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  COMPLETION  INDEX--consists  of all stocks in the Wilshire  5000
except for the 500 stocks in the Standard & 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, Australia, Asia, 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.

LEHMAN BROTHERS  LONG-TERM TREASURY BOND INDEX--is composed of all bonds covered
by the Shearson  Lehman Hutton  Treasury Bond Index with maturities of ten years
or greater.

MERRILL LYNCH  CORPORATE & GOVERNMENT  BOND  INDEX--consists  of over 4,500 U.S.
Treasury, agency and investment grade corporate bonds.

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

                                      B-21
<PAGE>

LEHMAN  BROTHERS  LONG-TERM  CORPORATE  BOND  INDEX--is  a subset of the  Lehman
Brothers   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 ten years.

BOND BUYER  MUNICIPAL BOND INDEX--is a yield index on current coupon  high-grade
general obligation municipal bonds.

STANDARD & POOR'S PREFERRED INDEX--is a yield index based upon the average yield
for four high-grade, non-callable 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  Brothers
Long-Term Corporate AA or Better Bond Index.

COMPOSITE INDEX--65% Lehman Brothers Long-Term Corporate AA or Better Bond Index
and a 35% weighting in a blended  equity  composite (75% Standard & Poor's/BARRA
Value Index, 12.5% Standard & Poor's Utilities Index and 12.5% Standard & Poor's
Telephone Index).

LEHMAN BROTHERS  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.

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.

RUSSELL 2000  (REGISTERED)  VALUE  INDEX--contains  stocks from the Russell 2000
Index with a less-than-average growth orientation.

LIPPER BALANCED FUND  AVERAGE--an  industry  benchmark of average balanced funds
with similar investment objectives and policies, as measured by Lipper 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 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 Inc.

LIPPER SMALLCAP FUND  AVERAGE--the  average  performance of small company growth
funds as defined by Lipper 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.)

LEHMAN  BROTHERS  AGGREGATE BOND INDEX--is a market weighted index that contains
individually priced U.S. Treasury,  agency, corporate, and mortgage pass-through
securities  corporate rated BBB- or better. The Index has a market value of over
$4 trillion.

LEHMAN  BROTHERS  CORPORATE A OR BETTER  BOND  INDEX--consists  of all  publicly
issued,  investment  grade  corporate  bonds rated A or better,  of all maturity
levels.

                                      B-22
<PAGE>

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
one and five years. The index has a market value of over $1.6 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 five and
ten years. The index has a market value of over $700 billion.

LEHMAN  BROTHERS  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  greater  than ten years.  The
index has a market value of over $900 billion.

LIPPER GENERAL EQUITY FUND  AVERAGE--an  industry  benchmark of average  general
equity funds with similar  investment  objectives  and policies,  as measured by
Lipper Inc.

LIPPER FIXED-INCOME FUND AVERAGE--an  industry benchmark of average fixed-income
funds with similar  investment  objectives  and policies,  as measured by Lipper
Inc.

AGGRESSIVE  GROWTH FUND STOCK INDEX--The Index is composed of the various common
stocks that are held in the 50 largest  aggressive  growth stock  mutual  funds,
using year-end net assets, monitored by Morningstar, Inc.

     Advertisements which refer to the use of the Fund as a potential investment
for  Individual  Retirement  Accounts  may  quote  a  total  return  based  upon
compounding of dividends on which it is presumed no federal income tax applies.

     In assessing such  comparisons of yields,  an investor  should keep in mind
that  the  composition  of the  investments  in  the  reported  averages  is not
identical  to  the  Fund's   portfolio  and  that  the  items  included  in  the
calculations  of such  averages  may not be identical to the formula used by the
Fund to calculate its yield. In addition there can be no assurance that the Fund
will continue its performance as compared to such other averages.

                              FINANCIAL STATEMENTS

The Fund's financial  statements as of and for the year ended December 31, 1999,
appearing in the Vanguard Morgan Growth Fund 1999 Annual Report to Shareholders,
and the report thereon of  PricewaterhouseCoopers  LLP, independent accountants,
also  appearing  therein,  are  incorporated  by reference in this  Statement of
Additional  Information.  For a more  complete  discussion  of the  performance,
please see the  Fund's  Annual  Report to  Shareholders,  which may be  obtained
without charge.


                                      B-23
<PAGE>

                                                            SAI026-MORGAN GROWTH

                                      B-24

<PAGE>


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