VANGUARD EXPLORER FUND INC
485APOS, 2000-03-27
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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549


                                   FORM N-1A

     REGISTRATION STATEMENT (NO. 2-27203) UNDER THE SECURITIES ACT OF 1933


                           PRE-EFFECTIVE AMENDMENT NO.
                        POST-EFFECTIVE AMENDMENT NO. 64
                                      AND


        REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940


                                AMENDMENT NO. 65


                             VANGUARD EXPLORER 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


              IT IS PROPOSED THAT THIS AMENDMENT BECOME EFFECTIVE:
          ON MAY 30, 2000, PURSUANT TO PARAGRAPH (A) OF RULE 485.


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



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                                                               VANGUARD(R)
                                                               EXPLORER(TM)
                                                               FUND

                                                               Prospectus
                                                               May 30, 2000


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


                                                                    [A MEMBER OF
                                                        THE VANGUARD GROUP LOGO]

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VANGUARD EXPLORER FUND
Prospectus

May 30, 2000

A Small-Company Growth Stock Mutual Fund
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CONTENTS
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 1  FUND PROFILE                         13  FINANCIAL HIGHLIGHT
 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
 5  PRIMARY INVESTMENT STRATEGIES            17  BUYING SHARES
 9  THE FUND AND VANGUARD                    19  REDEEMING SHARES
 9  INVESTMENT ADVISERS                      22  TRANSFERRING REGISTRATION
11  DIVIDENDS, CAPITAL GAINS, AND TAXES      23  FUND AND ACCOUNT UPDATES
13  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
Explorer  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 Explorer Fund.

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

INVESTMENT STRATEGIES
The Fund invests mainly in the stocks of small companies  (which, at the time of
purchase,  typically  have a  market  value  of  less  than $1  billion).  These
companies are considered by the Fund's advisers to have above-average  prospects
for growth. These companies often provide little or no dividend income.

PRIMARY RISKS
An investment in the Fund could lose money over short or even long periods.  You
should expect the Fund's share price and total return to fluctuate within a wide
range, like the overall stock market.  The Fund focuses on the stocks of smaller
companies. The Fund's performance could be hurt by:
- -    Investment   style   risk,   which  is  the  chance   that   returns   from
     small-capitalization  stocks will trail returns from other asset classes or
     the overall stock market. Such stocks have generally exhibited  significant
     volatility   due  to  several   factors   including   smaller   companies',
     less-certain prospects for growth, and dividends.
- -    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
indicate how it will perform in the future.

              ----------------------------------------------------
                              ANNUAL TOTAL RETURNS
              ----------------------------------------------------
                              1990         -10.80%
                              1991          55.90%
                              1992          13.02%
                              1993          15.41%
                              1994           0.54%
                              1995          26.60%
                              1996          14.04%
                              1997          14.57%
                              1998           3.52%
                              1999          37.26%
              ----------------------------------------------------

              The Fund's year-to-date return as of the most recent
              calendar quarter ended March 31, 2000, was x.xx%.
              ----------------------------------------------------

     During the period shown in the bar chart, the highest return for a calendar
quarter was 29.99% (quarter ended December 31, 1999) and the lowest return for a
quarter was -23.91% (quarter ended September 30, 1990).

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2

     ----------------------------------------------------------------------
          AVERAGE ANNUAL TOTAL RETURNS FOR YEARS ENDED DECEMBER 31, 1999
     ----------------------------------------------------------------------
                                       1 YEAR       5 YEARS        10 YEARS
     ----------------------------------------------------------------------
     Vanguard Explorer Fund            37.26%       18.64%          15.67%
     Russell 2000 Index                21.26        16.69           13.40
     ----------------------------------------------------------------------

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 October 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:                                  0.71%
     12b-1 Distribution Fee:                                None
     Other Expenses:                                       0.03%
      TOTAL ANNUAL FUND OPERATING EXPENSES:                0.74%

     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 the  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
               -------------------------------------------------
                 $76          $237          $411         $918
               -------------------------------------------------

     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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                                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 Explorer Fund's expense ratio in fiscal year 1999 was 0.74%,
or $7.40 per $1,000 of average net assets.  The average  small-cap growth mutual
fund had  expenses in 1999 of 1.64%,  or $16.40 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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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             SUITABLE FOR IRAS
Distributed annually in December        Yes

INVESTMENT ADVISERS                     MINIMUM INITIAL INVESTMENT
The Fund uses five advisers:            $3,000; $1,000 for IRAs and custodial
- - Granahan Investment Management,       accounts for minors
  Inc., Waltham, Mass., since 1990
- - Wellington Management Company,        NEWSPAPER ABBREVIATION
  LLP, Boston, Mass., since 1967        Explr
- - Chartwell Investment Partners,
  Berwyn, Pa., since 1997               VANGUARD FUND NUMBER
- - The Vanguard Group, Valley Forge,     024
  Pa., since 1997
- - Grantham, Mayo, Van Otterloo & Co.    CUSIP NUMBER
  LLC, Boston, Mass., beginning 2000    921926101

INCEPTION DATE                          TICKER SYMBOL
December 11, 1967                       VEXPX

NET ASSETS AS OF OCTOBER 31, 1999
$2.48 billion
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================================================================================
A WORD ABOUT RISK

This  prospectus  describes  risks you would  face as an  investor  in  Vanguard
Explorer  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 market.

     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 fund that focuses on small and/or  emerging  companies 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 dividend income.

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4

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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 it permits.
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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.

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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,  such stocks typically have low
dividend  yields  and  above-average  prices in  relation  to such  measures  as
revenue,  earnings,  and book values.  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 have 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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5

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 Board of Trustees oversees the management of the Fund
and may change the investment strategies in the interest of shareholders.

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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 typically 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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MARKET EXPOSURE

The  Fund's   primary   strategy   is  to  invest   chiefly  in  the  stocks  of
small-capitalization   companies  that  offer  strong  growth  potential.  These
companies  typically  provide  little or no dividend  income.  The Fund may also
invest in securities that are convertible to common stocks.

[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.

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                      U.S. STOCK MARKET RETURNS (1926-1998)
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                 1 YEAR       5 YEARS      10 YEARS      20 YEARS
- --------------------------------------------------------------------------------
Best              54.2%         24.1%        19.9%         17.7%
Worst            -43.1         -12.4         -0.8           3.1
Average           13.1          10.7         11.0          11.0
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6

     The table  covers all of the 1-, 5-,  10-,  and 20-year  periods  from 1926
through 1998. You can see, for example,  that while the average return on stocks
for all of the 5-year periods was 10.7%,  returns for individual  5-year periods
ranged  from a -12.4%  average  (from  1928  through  1932) to 24.1%  (from 1994
through 1998).  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.
     Keep in mind that  Vanguard  Explorer Fund focuses on the stocks of smaller
companies.  Small-cap stocks have historically  been more volatile  than--and at
times have performed quite differently  from--the  large-cap stocks found in the
S&P 500 Index.  This is due to several  factors,  including  smaller  companies'
less-certain prospects for growth and dividends.

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                                PLAIN TALK ABOUT
                              FUND DIVERSIFICATION

In general, the more diversified a fund's stock holdings,  the less likely it is
that a specific  stock's poor  performance  will hurt the fund. One measure of a
fund's  diversification  is the percentage of its assets  represented by its ten
largest  holdings.  The  average  U.S.  equity  mutual fund has about 30% of its
assets invested in its ten largest holdings,  while some less-diversified mutual
funds  have more than 50% of their  assets  invested  in the  stocks of just ten
companies.
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[FLAG]THE FUND IS SUBJECT TO  INVESTMENT  STYLE  RISK,  WHICH IS THE CHANCE THAT
     RETURNS FROM STOCKS OF SMALL  COMPANIES WILL TRAIL RETURNS FROM OTHER ASSET
     CLASSES  OR THE  OVERALL  STOCK  MARKET.  AS A GROUP,  SMALL-CAPITALIZATION
     STOCKS 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.


SECURITY SELECTION

Vanguard  Explorer  Fund  employs  five  investment   advisers,   each  of  whom
independently  chooses and  maintains a portfolio of common stocks for the Fund.
The Fund's Board of Trustees  decides the proportion of net assets to be managed
by each adviser and may change the proportions as circumstances warrant.
     The five advisers use active  investment  management  methods,  which means
they buy and sell securities  based on their judgments about companies and their
financial  prospects,  the prices of the securities,  and about the stock market
and the economy in general.
     Each adviser uses different  processes to select securities for its portion
of the Fund's  assets;  however,  each is  committed  to buying  stocks of small
companies that, in the adviser's opinion, have strong growth potential.
     Granahan Investment Management, Inc. (Granahan),  which was responsible for
approximately  44%  of  the  Fund's  assets  as of  December  31,  1999,  groups
securities  into three  categories as part of its selection  process.  The first
category,  "core  growth,"  emphasizes  companies  that  have  a  well-known  or
established  product  and,  as a result,  have a proven  record of growth  and a
strong market position.  The second category,  "pioneers,"  comprises  companies
that offer  unique  products or  technologies  that may lead to new  products or
expansion  into new  markets.  Granahan  judges  "pioneer"  stocks  based on the
estimated  growth  potential  compared  to market  value.  The  third  category,
"special  value,"  includes  companies  that lack a record of strong  growth but
that, in the adviser's  view,  are both  undervalued in the market and likely to
grow in the next few years. "Core growth" stocks


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7


generally make up 50% to 80% of Granahan's share of Fund assets,  with the other
two categories generally at 10% to 25% each.
     Wellington  Management  Company,  LLP  (Wellington  Management),  which was
responsible for  approximately 29% of the Fund's assets as of December 31, 1999,
uses  research and  analysis of  individual  companies to select  stocks that it
feels have  exceptional  growth  potential  relative to their  valuation  in the
marketplace.
     Wellington  Management  considers each stock individually  before purchase,
and  continually  monitors  developments  at these  companies for  comparison to
Wellington  Management's  expectations for growth. To help protect against risk,
the portfolio is broadly diversified both by number of stocks and by exposure to
a range of industries.
     Chartwell  Investment  Partners  (Chartwell),  which  was  responsible  for
approximately  13%  of  the  Fund's  assets  as of December  31,  1999,  uses  a
research-driven  process  to choose  stocks  judged to have  exceptional  growth
potential and to be selling at reasonable prices.
     After  considering  each  stock  individually  before  purchase,  Chartwell
constantly  monitors  characteristics  of its Fund holdings as a group. In doing
so,  Chartwell uses  computerized  techniques to constantly  evaluate its Fund's
holdings.
     The Vanguard Group (Vanguard) employs a "quantitative" investment approach.
It uses computerized mathematical models to select a sampling of stocks that, as
a group, are expected to have returns and investment  characteristics similar to
the Small  Company  Growth Fund Stock Index,  which is made up of stocks held by
the nation's 25 largest small-company mutual funds. Vanguard was responsible for
approximately 9% of the Fund's assets as of December 31, 1999.
     The fifth  adviser,  Grantham,  Mayo,  Van  Otterloo & Co. LLC (GMO)  began
managing new cash invested in the Fund on April 3, 2000.  GMO uses  computerized
models  to  select  the  most  attractive   small-capitalization  growth  stocks
according to several criteria, including changes in projected earnings, earnings
growth, and recent price trends. This quantitative investment method is expected
to result in a portfolio that is broadly diversified among small-cap stocks. GMO
seeks to maintain  reasonable  liquidity  by limiting  positions  in  individual
issues.
     The balance of Vanguard  Explorer  Fund's  assets,  as of December 31, 1999
about 5%, is held in cash  reserves  and managed by Vanguard,  which  invests in
stock  index  futures so that the cash  reserve  portion of the Fund may achieve
performance  similar to that 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.  See  below for more  details  on the  Fund's  policy on
futures.
     The Fund is generally managed without regard to tax ramifications.

[FLAG]THE FUND IS SUBJECT TO MANAGER RISK, WHICH IS THE CHANCE THAT THE ADVISERS
     MAY 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 70%. (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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8
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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. The average turnover rate for all domestic stock funds in 1999
was approximately 89%, 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,  it reserves the right
to invest up to 20% of its assets in foreign securities. These securities may be
traded in U.S. or foreign  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 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 invest up to 15% of its assets in restricted  securities  with
limited marketability or other illiquid securities.
     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.

<PAGE>

9

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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). Futures and
options are derivatives  that 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 $540 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.

- --------------------------------------------------------------------------------
                                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 uses five investment  advisers,  each of which independently  manages a
percentage  of the Fund's  assets  subject to the  control of the  Trustees  and
officers of the Fund. The advisers are:
- -    Granahan Investment Management, Inc. (Granahan), 275 Wyman Street, Waltham,
     MA 02154,  is an investment  advisory firm  specializing  in  small-company
     stock investments.  Founded in 1985, Granahan managed about $1.7 billion in
     assets as of December 31, 1999.
- -    Wellington  Management  Company,  LLP  (Wellington  Management),  75  State
     Street,  Boston, MA 02109, is an investment  advisory firm founded in 1928.
     As of December  31,  1999,  Wellington  Management  managed  more than $235
     billion in stock and bond portfolios.
- -    Chartwell Investment Partners (Chartwell), 1235 Westlakes Drive, Suite 330,
     Berwyn,  PA 19312,  is an  investment  advisory firm founded in 1997. As of
     December 31, 1999, Chartwell managed about $3.7 billion in assets.


<PAGE>

10


- -    The Vanguard  Group  (Vanguard),  P.O. Box 2600,  Valley  Forge,  PA 19482,
     provides  at-cost  investment  advisory  services  to many  Vanguard  funds
     through  its Core  Management  and Fixed  Income  Groups.  Founded in 1975,
     Vanguard managed more than $371 billion in assets as of December 31, 1999.
- -    Grantham,  Mayo, Van Otterloo & Co. LLC (GMO), 40 Rowes Wharf,  Boston,  MA
     02110,  is an investment  advisory firm founded in 1977. As of December 31,
     1999, GMO managed about $26 billion in assets.
     The  Fund  pays  four  of  its  investment  advisers--Granahan,  Wellington
Management,  Chartwell,  and GMO--on a quarterly  basis.  For each adviser,  the
quarterly  fee is based on certain  annual  percentage  rates applied to average
month-end  net assets  managed by the  adviser  over the  quarterly  period.  In
addition,  the  quarterly  fees paid to each adviser are  increased or decreased
based upon the adviser's  performance  in comparison to a benchmark  index.  For
these purposes,  the cumulative investment performance of each adviser's portion
of the Fund over a trailing  36-month period is compared to the cumulative total
return of the Small  Company  Growth Fund Stock Index (for GMO, the Russell 2000
Growth Index) over the same period.
     The  Fund's  most  recent  STATEMENT  OF  ADDITIONAL  INFORMATION  provides
complete details of how Granahan, Wellington Management,  Chartwell, and GMO are
compensated.  The Fund pays no  advisory  fees to  Vanguard,  since it  provides
services to the Fund on an at-cost basis.  For the fiscal year ended October 31,
1999,  the Fund  paid  aggregate  advisory  fees and  expenses  representing  an
effective annual rate of 0.25% of the Fund's average net assets for the year.

     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 adviser is 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.

<PAGE>

11

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

The individuals primarily responsible for Vanguard Explorer Fund are:

JOHN J. GRANAHAN,  CFA, Founder and President of Granahan Investment Management,
Inc.; in investment  management since 1963, with Granahan since 1985; adviser to
the Fund since 1990; B.A., St. Joseph's University;  Graduate Fellow of Catholic
University of America.

KENNETH L. ABRAMS,  Senior Vice President of Wellington Management Company, LLP;
in investment  management  since 1982,  with Wellington  Management  since 1986;
adviser to the Fund since 1994; B.A. and M.B.A., Stanford University.

EDWARD N. ANTOIAN,  CFA, Partner and one of the founders of Chartwell Investment
Partners; in investment management, managing equity funds, since 1984; cofounder
of Chartwell in 1997;  adviser to the Fund since 1997; B.S., State University of
New York; M.B.A., University of Pennsylvania.

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.

CHRISTOPHER M. DARNELL,  Chief  Investment  Officer of  Quantitative  Investment
Products and Chairman of the U.S.  Equity  Investment  Policy Group at Grantham,
Mayo, Van Otterloo & Co. LLC; has managed  investments for GMO since 1979; began
managing assets of the Fund in 2000;  B.A.,  Yale  University;  M.B.A.,  Harvard
University.

ROBERT M. SOUCY,  Managing  Director of U.S.  Quantitative  Equity at  Grantham,
Mayo, Van Otterloo & Co. LLC; has managed  investments for GMO since 1987; began
managing assets of the Fund in 2000; B.S., University of Massachusetts.

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

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. 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.

- --------------------------------------------------------------------------------
                                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.
- --------------------------------------------------------------------------------

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.
- -    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.

<PAGE>

13

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.

SHARE PRICE

The Fund's share price,  called its net asset value,  or NAV, is calculated each
business day after the close of 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 EXPLR.

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 year 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.

<PAGE>

14

FINANCIAL HIGHLIGHTS (continued)

- --------------------------------------------------------------------------------
                                          VANGUARD EXPLORER FUND
                                          YEAR ENDED OCTOBER 31,
                        --------------------------------------------------------
                          1999       1998         1997         1996        1995
- --------------------------------------------------------------------------------
NET ASSET VALUE,
 BEGINNING OF YEAR      $49.60     $62.31       $55.44       $51.05      $45.99
- --------------------------------------------------------------------------------
INVESTMENT OPERATIONS
 Net Investment Income     .21        .21          .26          .26         .24
 Net Realized and
  Unrealized Gain
  (Loss) on Investments  12.18      (6.82)        9.71         8.37        7.25
                        --------------------------------------------------------
  Total from Investment
   Operations            12.39      (6.61)        9.97         8.63        7.49
                        --------------------------------------------------------
DISTRIBUTIONS
 Dividends from Net
  Investment Income       (.20)      (.25)        (.27)        (.24)       (.17)
 Distributions from
  Realized Capital Gains  (.30)     (5.85)       (2.83)       (4.00)      (2.26)
                        --------------------------------------------------------
  Total Distributions     (.50)     (6.10)       (3.10)       (4.24)      (2.43)
- --------------------------------------------------------------------------------
NET ASSET VALUE, END
 OF YEAR                $61.49     $49.60       $62.31       $55.44      $51.05
================================================================================
TOTAL RETURN            25.14%    -11.22%       18.93%       17.97%      17.46%
================================================================================
RATIOS/SUPPLEMENTAL DATA
 Net Assets, End of
  Year (Millions)       $2,484     $2,196       $2,550       $2,186      $1,476
 Ratio of Total Expenses to
  Average Net Assets     0.74%      0.62%        0.62%        0.63%       0.68%
 Ratio of Net Investment
  Income to Average
  Net Assets             0.36%      0.37%        0.45%        0.51%       0.52%
 Turnover Rate             79%        72%          84%          51%         66%
================================================================================

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

The Fund began  fiscal 1999 with a net asset value  (price) of $49.60 per share.
During  the  year,  the Fund  earned  $0.21  per share  from  investment  income
(interest  and  dividends)  and  $12.18  per  share  from  investments  that had
appreciated  in value or that were sold for higher prices than the Fund paid for
them.
Shareholders  received $0.50 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  ($12.39  per  share)  minus the  distributions  ($0.50 per share)
resulted in a share price of $61.49 at the end of the year. This was an increase
of $11.89 per share (from  $49.60 at the  beginning of the year to $61.49 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 25.14% for the year.
As of October 31, 1999, the Fund had $2.484 billion in net assets. For the year,
its  expense  ratio was 0.74%  ($7.40  per  $1,000 of net  assets);  and its net
investment  income  amounted to 0.36% of its  average  net  assets.  It sold and
replaced securities valued at 79% 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 ICON]. 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 ICON]
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 ICON]
Automatic  method for  moving a fixed  amount of money  from one  Vanguard  fund
account to another.
- --------------------------------------------------------------------------------
VANGUARD FUND EXPRESS(R) [BOOK ICON]
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 ICON]
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 ICON]
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 [COMPUTER ICON]
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 ICON]
Invest assets held in an existing personal trust.
- --------------------------------------------------------------------------------
FOR INDIVIDUAL RETIREMENT ACCOUNTS [BOOK ICON]
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 ICON]
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 ICON]
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-24
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 . . . [TELEPHONE ICON]
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).

<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 ICON]
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 Explorer Fund-24
[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 21.

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 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 some other  retirement  accounts.  If you sell  shares of these
funds online, a redemption check will be sent to your address of record.

- --------------------------------------------------------------------------------
ONLINE REQUESTS [COMPUTER ICON]
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 ICON]
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.

<PAGE>

20

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

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 ICON]
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.

<PAGE>

21

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
- --------------------------------------------------------------------------------
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  pre-linked  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  may be  obtained  from  most
     commercial and savings banks,  credit unions,  trust  companies,  or member
     firms of a U.S. stock exchange.

<PAGE>

22

TRANSACTIONS ARE PROCESSED AT THE NEXT-DETERMINED SHARE PRICE AFTER VANGUARD HAS
RECEIVED ALL REQUIRED INFORMATION.
- --------------------------------------------------------------------------------
LIMITS ON ACCOUNT ACTIVITY
Because  excessive  account  transactions can disrupt the 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.
- --------------------------------------------------------------------------------

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

<PAGE>

23

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 ICON]
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 December and June 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.
- --------------------------------------------------------------------------------
AVERAGE COST REVIEW STATEMENT [BOOK ICON]
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>


                     (THIS PAGE INTENTIONALLY LEFT BLANK.)


<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.

COUNTRY RISK
The chance  that  events  such as  political  or  financial  troubles or natural
disasters will weaken a country's economy.

CURRENCY RISK
The chance that an  American's  foreign  investment  will lose money  because of
unfavorable currency exchange rate movements.

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-1
distribution 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.

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 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.

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 Explorer 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 1-800-SEC-0330. 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 writing the Public Reference
Section, Securities and Exchange
Commission, Washington, DC
20549-0102.

Fund's Investment Company Act file
number: 811-1530


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

P024N-05/30/2000


<PAGE>


                                                          VANGUARD(R)
                                                          EXPLORER(TM)
                                                          FUND

                                                          Participant Prospectus
                                                          May 30, 2000

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


                                                                    [A MEMBER OF
                                                        THE VANGUARD GROUP LOGO]

<PAGE>

VANGUARD EXPLORER FUND
Participant Prospectus

May 30, 2000

A Small-Company Growth Stock Mutual Fund
- --------------------------------------------------------------------------------
CONTENTS
 1  FUND PROFILE                      11  DIVIDENDS, CAPITAL GAINS, AND TAXES
 3  ADDITIONAL INFORMATION            12  SHARE PRICE
 3  A WORD ABOUT RISK                 12  FINANCIAL HIGHLIGHTS
 3  WHO SHOULD INVEST                 14  INVESTING WITH VANGUARD
 5  PRIMARY INVESTMENT STRATEGIES     15  ACCESSING FUND INFORMATION BY COMPUTER
 9  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
Explorer  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 Explorer Fund.

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

INVESTMENT STRATEGIES
The Fund invests mainly in the stocks of small companies  (which, at the time of
purchase,  typically  have a  market  value  of  less  than $1  billion).  These
companies are considered by the Fund's advisers to have above-average  prospects
for growth. These companies often provide little or no dividend income.

PRIMARY RISKS
An investment in the Fund could lose money over short or even long periods.  You
should expect the Fund's share price and total return to fluctuate within a wide
range, like the overall stock market.  The Fund focuses on the stocks of smaller
companies. The Fund's performance could be hurt by:
- -    Investment   style   risk,   which  is  the  chance   that   returns   from
     small-capitalization  stocks will trail returns from other asset classes or
     the overall stock market. Such stocks have generally exhibited  significant
     volatility   due  to  several   factors   including   smaller   companies',
     less-certain prospects for growth, and dividends.
- -    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
indicate how it will perform in the future.

              ----------------------------------------------------
                              ANNUAL TOTAL RETURNS
              ----------------------------------------------------
                              1990         -10.80%
                              1991          55.90%
                              1992          13.02%
                              1993          15.41%
                              1994           0.54%
                              1995          26.60%
                              1996          14.04%
                              1997          14.57%
                              1998           3.52%
                              1999          37.26%
              ----------------------------------------------------

              The Fund's year-to-date return as of the most recent
              calendar quarter ended March 31, 2000, was x.xx%.
              ----------------------------------------------------

     During the period shown in the bar chart, the highest return for a calendar
quarter was 29.99% (quarter ended December 31, 1999) and the lowest return for a
quarter was -23.91% (quarter ended September 30, 1990).

<PAGE>

2

     ----------------------------------------------------------------------
          AVERAGE ANNUAL TOTAL RETURNS FOR YEARS ENDED DECEMBER 31, 1999
     ----------------------------------------------------------------------
                                       1 YEAR       5 YEARS        10 YEARS
     ----------------------------------------------------------------------
     Vanguard Explorer Fund            37.26%       18.64%          15.67%
     Russell 2000 Index                21.26        16.69           13.40
     ----------------------------------------------------------------------

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 October 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:                                  0.71%
     12b-1 Distribution Fee:                                None
     Other Expenses:                                       0.03%
      TOTAL ANNUAL FUND OPERATING EXPENSES:                0.74%

     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 the  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
               -------------------------------------------------
                 $76          $237          $411         $918
               -------------------------------------------------

     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.

- --------------------------------------------------------------------------------
                                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 Explorer Fund's expense ratio in fiscal year 1999 was 0.74%,
or $7.40 per $1,000 of average net assets.  The average  small-cap growth mutual
fund had  expenses in 1999 of 1.64%,  or $16.40 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.

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

<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                  INCEPTION DATE
Distributed annually in December             December 11, 1967

INVESTMENT ADVISERS                          NET ASSETS AS OF OCTOBER 31, 1999
The Fund uses five advisers:                 $2.48 billion
- -  Granahan Investment Management, Inc.,
   Waltham, Mass., since 1990                NEWSPAPER ABBREVIATION
- -  Wellington Management Company, LLP,       Explr
   Boston, Mass., since 1967
- -  Chartwell Investment Partners, Berwyn,    VANGUARD FUND NUMBER
   Pa., since 1997                           024
- -  The Vanguard Group, Valley Forge, Pa.,
   since 1997
- -  Grantham, Mayo, Van Otterloo & Co.        CUSIP NUMBER
   LLC, Boston, Mass., beginning 2000        921926101

                                             TICKER SYMBOL
                                             VEXPX
- --------------------------------------------------------------------------------

================================================================================
A WORD ABOUT RISK

This  prospectus  describes  risks you would  face as an  investor  in  Vanguard
Explorer  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 market.

     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 fund that focuses on small and/or  emerging  companies 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 dividend income.

<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 it permits.
- --------------------------------------------------------------------------------

     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.

- --------------------------------------------------------------------------------
                                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,  such stocks typically have low
dividend  yields  and  above-average  prices in  relation  to such  measures  as
revenue,  earnings,  and book values.  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 have 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.
- --------------------------------------------------------------------------------

<PAGE>

5

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 Board of Trustees oversees the management of the Fund
and may change the investment strategies in the interest of shareholders.

- --------------------------------------------------------------------------------
                                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 typically 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.
- --------------------------------------------------------------------------------

MARKET EXPOSURE

The  Fund's   primary   strategy   is  to  invest   chiefly  in  the  stocks  of
small-capitalization   companies  that  offer  strong  growth  potential.  These
companies  typically  provide  little or no dividend  income.  The Fund may also
invest in securities that are convertible to common stocks.


[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 (1926-1998)
- --------------------------------------------------------------------------------
                 1 YEAR       5 YEARS      10 YEARS      20 YEARS
- --------------------------------------------------------------------------------
Best              54.2%         24.1%        19.9%         17.7%
Worst            -43.1         -12.4         -0.8           3.1
Average           13.1          10.7         11.0          11.0
- --------------------------------------------------------------------------------

<PAGE>

6

     The table  covers all of the 1-, 5-,  10-,  and 20-year  periods  from 1926
through 1998. You can see, for example,  that while the average return on stocks
for all of the 5-year periods was 10.7%,  returns for individual  5-year periods
ranged  from a -12.4%  average  (from  1928  through  1932) to 24.1%  (from 1994
through 1998).  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.
     Keep in mind that  Vanguard  Explorer Fund focuses on the stocks of smaller
companies.  Small-cap stocks have historically  been more volatile  than--and at
times have performed quite differently  from--the  large-cap stocks found in the
S&P 500 Index.  This is due to several  factors,  including  smaller  companies'
less-certain prospects for growth and dividends.

- --------------------------------------------------------------------------------
                                PLAIN TALK ABOUT
                              FUND DIVERSIFICATION

In general, the more diversified a fund's stock holdings,  the less likely it is
that a specific  stock's poor  performance  will hurt the fund. One measure of a
fund's  diversification  is the percentage of its assets  represented by its ten
largest  holdings.  The  average  U.S.  equity  mutual fund has about 30% of its
assets invested in its ten largest holdings,  while some less-diversified mutual
funds  have more than 50% of their  assets  invested  in the  stocks of just ten
companies.
- --------------------------------------------------------------------------------

[FLAG]THE FUND IS SUBJECT TO  INVESTMENT  STYLE  RISK,  WHICH IS THE CHANCE THAT
     RETURNS FROM STOCKS OF SMALL  COMPANIES WILL TRAIL RETURNS FROM OTHER ASSET
     CLASSES  OR THE  OVERALL  STOCK  MARKET.  AS A GROUP,  SMALL-CAPITALIZATION
     STOCKS 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.

SECURITY SELECTION

Vanguard  Explorer  Fund  employs  five  investment   advisers,   each  of  whom
independently  chooses and  maintains a portfolio of common stocks for the Fund.
The Fund's Board of Trustees  decides the proportion of net assets to be managed
by each adviser and may change the proportions as circumstances warrant.
     The five advisers use active  investment  management  methods,  which means
they buy and sell securities  based on their judgments about companies and their
financial  prospects,  the prices of the securities,  and about the stock market
and the economy in general.

     Each adviser uses different  processes to select securities for its portion
of the Fund's  assets;  however,  each is  committed  to buying  stocks of small
companies that, in the adviser's opinion, have strong growth potential.

     Granahan Investment Management, Inc. (Granahan),  which was responsible for
approximately  44%  of  the  Fund's  assets  as of  December  31,  1999,  groups
securities  into three  categories as part of its selection  process.  The first
category,  "core  growth,"  emphasizes  companies  that  have  a  well-known  or
established  product  and,  as a result,  have a proven  record of growth  and a
strong market position.  The second category,  "pioneers,"  comprises  companies
that offer  unique  products or  technologies  that may lead to new  products or
expansion  into new  markets.  Granahan  judges  "pioneer"  stocks  based on the
estimated  growth  potential  compared  to market  value.  The  third  category,
"special  value,"  includes  companies  that lack a record of strong  growth but
that, in the adviser's  view,  are both  undervalued in the market and likely to
grow in the next few years. "Core growth" stocks


<PAGE>

7


generally make up 50% to 80% of Granahan's share of Fund assets,  with the other
two categories generally at 10% to 25% each.
     Wellington  Management  Company,  LLP  (Wellington  Management),  which was
responsible for  approximately 29% of the Fund's assets as of December 31, 1999,
uses  research and  analysis of  individual  companies to select  stocks that it
feels have  exceptional  growth  potential  relative to their  valuation  in the
marketplace.
     Wellington  Management  considers each stock individually  before purchase,
and  continually  monitors  developments  at these  companies for  comparison to
Wellington  Management's  expectations for growth. To help protect against risk,
the portfolio is broadly diversified both by number of stocks and by exposure to
a range of industries.
     Chartwell  Investment  Partners  (Chartwell),  which  was  responsible  for
approximately  13%  of  the  Fund's  assets  as of December  31,  1999,  uses  a
research-driven  process  to choose  stocks  judged to have  exceptional  growth
potential and to be selling at reasonable prices.
     After  considering  each  stock  individually  before  purchase,  Chartwell
constantly  monitors  characteristics  of its Fund holdings as a group. In doing
so,  Chartwell uses  computerized  techniques to constantly  evaluate its Fund's
holdings.
     The Vanguard Group (Vanguard) employs a "quantitative" investment approach.
It uses computerized mathematical models to select a sampling of stocks that, as
a group, are expected to have returns and investment  characteristics similar to
the Small  Company  Growth Fund Stock Index,  which is made up of stocks held by
the nation's 25 largest small-company mutual funds. Vanguard was responsible for
approximately 9% of the Fund's assets as of December 31, 1999.
     The fifth  adviser,  Grantham,  Mayo,  Van  Otterloo & Co. LLC (GMO)  began
managing new cash invested in the Fund on April 3, 2000.  GMO uses  computerized
models  to  select  the  most  attractive   small-capitalization  growth  stocks
according to several criteria, including changes in projected earnings, earnings
growth, and recent price trends. This quantitative investment method is expected
to result in a portfolio that is broadly diversified among small-cap stocks. GMO
seeks to maintain  reasonable  liquidity  by limiting  positions  in  individual
issues.
     The balance of Vanguard  Explorer  Fund's  assets,  as of December 31, 1999
about 5%, is held in cash  reserves  and managed by Vanguard,  which  invests in
stock  index  futures so that the cash  reserve  portion of the Fund may achieve
performance  similar to that 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.  See  below for more  details  on the  Fund's  policy on
futures.
     The Fund is generally managed without regard to tax ramifications.

[FLAG]THE FUND IS SUBJECT TO MANAGER RISK, WHICH IS THE CHANCE THAT THE ADVISERS
     MAY 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 70%. (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.)

<PAGE>

8

- --------------------------------------------------------------------------------
                                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. The average turnover rate for all domestic stock funds in 1999
was approximately 89%, 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,  it reserves the right
to invest up to 20% of its assets in foreign securities. These securities may be
traded in U.S. or foreign  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 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 invest up to 15% of its assets in restricted  securities  with
limited marketability or other illiquid securities.
     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.

<PAGE>

9

- --------------------------------------------------------------------------------
                                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). Futures and
options are derivatives  that 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 $540 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.

- --------------------------------------------------------------------------------
                                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 uses five investment  advisers,  each of which independently  manages a
percentage  of the Fund's  assets  subject to the  control of the  Trustees  and
officers of the Fund. The advisers are:
- -    Granahan Investment Management, Inc. (Granahan), 275 Wyman Street, Waltham,
     MA 02154,  is an investment  advisory firm  specializing  in  small-company
     stock investments.  Founded in 1985, Granahan managed about $1.7 billion in
     assets as of December 31, 1999.
- -    Wellington  Management  Company,  LLP  (Wellington  Management),  75  State
     Street,  Boston, MA 02109, is an investment  advisory firm founded in 1928.
     As of December  31,  1999,  Wellington  Management  managed  more than $235
     billion in stock and bond portfolios.
- -    Chartwell Investment Partners (Chartwell), 1235 Westlakes Drive, Suite 330,
     Berwyn,  PA 19312,  is an  investment  advisory firm founded in 1997. As of
     December 31, 1999, Chartwell managed about $3.7 billion in assets.


<PAGE>

10


- -    The Vanguard  Group  (Vanguard),  P.O. Box 2600,  Valley  Forge,  PA 19482,
     provides  at-cost  investment  advisory  services  to many  Vanguard  funds
     through  its Core  Management  and Fixed  Income  Groups.  Founded in 1975,
     Vanguard managed more than $371 billion in assets as of December 31, 1999.
- -    Grantham,  Mayo, Van Otterloo & Co. LLC (GMO), 40 Rowes Wharf,  Boston,  MA
     02110,  is an investment  advisory firm founded in 1977. As of December 31,
     1999, GMO managed about $26 billion in assets.
     The  Fund  pays  four  of  its  investment  advisers--Granahan,  Wellington
Management,  Chartwell,  and GMO--on a quarterly  basis.  For each adviser,  the
quarterly  fee is based on certain  annual  percentage  rates applied to average
month-end  net assets  managed by the  adviser  over the  quarterly  period.  In
addition,  the  quarterly  fees paid to each adviser are  increased or decreased
based upon the adviser's  performance  in comparison to a benchmark  index.  For
these purposes,  the cumulative investment performance of each adviser's portion
of the Fund over a trailing  36-month period is compared to the cumulative total
return of the Small  Company  Growth Fund Stock Index (for GMO, the Russell 2000
Growth Index) over the same period.
     The  Fund's  most  recent  STATEMENT  OF  ADDITIONAL  INFORMATION  provides
complete details of how Granahan, Wellington Management,  Chartwell, and GMO are
compensated.  The Fund pays no  advisory  fees to  Vanguard,  since it  provides
services to the Fund on an at-cost basis.  For the fiscal year ended October 31,
1999,  the Fund  paid  aggregate  advisory  fees and  expenses  representing  an
effective annual rate of 0.25% of the Fund's average net assets for the year.

     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 adviser is 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.

<PAGE>

11

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

The individuals primarily responsible for Vanguard Explorer Fund are:

JOHN J. GRANAHAN,  CFA, Founder and President of Granahan Investment Management,
Inc.; in investment  management since 1963, with Granahan since 1985; adviser to
the Fund since 1990; B.A., St. Joseph's University;  Graduate Fellow of Catholic
University of America.

KENNETH L. ABRAMS,  Senior Vice President of Wellington Management Company, LLP;
in investment  management  since 1982,  with Wellington  Management  since 1986;
adviser to the Fund since 1994; B.A. and M.B.A., Stanford University.

EDWARD N. ANTOIAN,  CFA, Partner and one of the founders of Chartwell Investment
Partners; in investment management, managing equity funds, since 1984; cofounder
of Chartwell in 1997;  adviser to the Fund since 1997; B.S., State University of
New York; M.B.A., University of Pennsylvania.

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.

CHRISTOPHER M. DARNELL,  Chief  Investment  Officer of  Quantitative  Investment
Products and Chairman of the U.S.  Equity  Investment  Policy Group at Grantham,
Mayo, Van Otterloo & Co. LLC; has managed  investments for GMO since 1979; began
managing assets of the Fund in 2000;  B.A.,  Yale  University;  M.B.A.,  Harvard
University.

ROBERT M. SOUCY,  Managing  Director of U.S.  Quantitative  Equity at  Grantham,
Mayo, Van Otterloo & Co. LLC; has managed  investments for GMO since 1987; began
managing assets of the Fund in 2000; B.S., University of Massachusetts.

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

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.
     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>

12

- --------------------------------------------------------------------------------
                                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 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 EXPLR.

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 year 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.

<PAGE>

13

- --------------------------------------------------------------------------------
                                          VANGUARD EXPLORER FUND
                                          YEAR ENDED OCTOBER 31,
                        --------------------------------------------------------
                          1999       1998         1997         1996        1995
- --------------------------------------------------------------------------------
NET ASSET VALUE,
 BEGINNING OF YEAR      $49.60     $62.31       $55.44       $51.05      $45.99
- --------------------------------------------------------------------------------
INVESTMENT OPERATIONS
 Net Investment Income     .21        .21          .26          .26         .24
 Net Realized and
  Unrealized Gain
  (Loss) on Investments  12.18      (6.82)        9.71         8.37        7.25
                        --------------------------------------------------------
  Total from Investment
   Operations            12.39      (6.61)        9.97         8.63        7.49
                        --------------------------------------------------------
DISTRIBUTIONS
 Dividends from Net
  Investment Income       (.20)      (.25)        (.27)        (.24)       (.17)
 Distributions from
  Realized Capital Gains  (.30)     (5.85)       (2.83)       (4.00)      (2.26)
                        --------------------------------------------------------
  Total Distributions     (.50)     (6.10)       (3.10)       (4.24)      (2.43)
- --------------------------------------------------------------------------------
NET ASSET VALUE, END
 OF YEAR                $61.49     $49.60       $62.31       $55.44      $51.05
================================================================================
TOTAL RETURN            25.14%    -11.22%       18.93%       17.97%      17.46%
================================================================================
RATIOS/SUPPLEMENTAL DATA
 Net Assets, End of
  Year (Millions)       $2,484     $2,196       $2,550       $2,186      $1,476
 Ratio of Total Expenses to
  Average Net Assets     0.74%      0.62%        0.62%        0.63%       0.68%
 Ratio of Net Investment
  Income to Average
  Net Assets             0.36%      0.37%        0.45%        0.51%       0.52%
 Turnover Rate             79%        72%          84%          51%         66%
================================================================================

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

The Fund began  fiscal 1999 with a net asset value  (price) of $49.60 per share.
During  the  year,  the Fund  earned  $0.21  per share  from  investment  income
(interest  and  dividends)  and  $12.18  per  share  from  investments  that had
appreciated  in value or that were sold for higher prices than the Fund paid for
them.
Shareholders  received $0.50 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  ($12.39  per  share)  minus the  distributions  ($0.50 per share)
resulted in a share price of $61.49 at the end of the year. This was an increase
of $11.89 per share (from  $49.60 at the  beginning of the year to $61.49 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 25.14% for the year.
As of October 31, 1999, the Fund had $2.484 billion in net assets. For the year,
its  expense  ratio was 0.74%  ($7.40  per  $1,000 of net  assets);  and its net
investment  income  amounted to 0.36% of its  average  net  assets.  It sold and
replaced securities valued at 79% 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 Services 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  Participant  Services,
     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

- --------------------------------------------------------------------------------
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.
- --------------------------------------------------------------------------------

<PAGE>


                     (THIS PAGE INTENTIONALLY LEFT BLANK.)

<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.

COUNTRY RISK
The chance  that  events  such as  political  or  financial  troubles or natural
disasters will weaken a country's economy.

CURRENCY RISK
The chance that an  American's  foreign  investment  will lose money  because of
unfavorable currency exchange rate movements.

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-1
distribution 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.

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 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.

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 Explorer 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 SERVICES 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 1-800-SEC-0330. 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 writing
the Public Reference Section,
Securities and Exchange
Commission, Washington, DC
20549-0102.

Fund's Investment Company Act
file number: 811-1530


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

I024N-05/30/2000


<PAGE>


                                     PART B

                          VANGUARD(R) EXPLORER(TM) FUND
                                   (THE FUND)

                       STATEMENT OF ADDITIONAL INFORMATION

                                  MAY 30, 2000

This Statement is not a prospectus  but should be read in  conjunction  with the
Fund's current  Prospectus (dated May 30, 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

                                                                            PAGE
                                                                            ----
DESCRIPTION OF THE FUND......................................................B-1
INVESTMENT POLICIES..........................................................B-3
PURCHASE OF SHARES...........................................................B-7
REDEMPTION OF SHARES.........................................................B-8
SHARE PRICE..................................................................B-9
YIELD AND TOTAL RETURN.......................................................B-9
FUNDAMENTAL INVESTMENT LIMITATIONS..........................................B-11
MANAGEMENT OF THE FUND......................................................B-12
INVESTMENT ADVISORY SERVICES................................................B-15
PORTFOLIO TRANSACTIONS......................................................B-22
COMPARATIVE INDEXES.........................................................B-22
FINANCIAL STATEMENTS........................................................B-24

                            DESCRIPTION OF THE FUND

ORGANIZATION
     The Fund was originally  known as the Explorer Fund, Inc. and was organized
as a Delaware  corporation in 1967. The Fund merged into a Maryland  corporation
in 1973, and was subsequently  reorganized as a Delaware  business trust in June
1998.  Prior to its  reorganization  as a Delaware  business trust, the Fund was
known as Vanguard  Explorer  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 a single class of shares,  but has the
ability to offer  additional  share classes.  There is no limit on the number of
full and fractional shares that the Fund may issue.

SERVICE PROVIDERS

     CUSTODIAN.  State  Street  Bank and Trust  Company,  225  Franklin  Street,
Boston,   Massachusetts  02110,  serves  as  the  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 the Fund's financial  statements 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
its assets.  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 Fund's  shareholders  are  entitled  to receive  any
dividends or other  distributions  declared by the Fund. No shares have priority
or preference over any other shares of the Fund with respect to distributions of
the Fund.  Distributions  will be made from the assets of the Fund,  and will be
paid ratably to all  shareholders  of the Fund according to the number of shares
of the Fund held by shareholders on the record date.
     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 Fund that would  adversely  affect to a material
degree  the  rights  and  preferences  of the  shares of the 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. Voting rights are
non-cumulative 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 interest,  and
make  substantial  distributions  before regaining its tax status as a regulated
investment company.


                                      B-2
<PAGE>

                              INVESTMENT POLICIES

The following  policies  supplement the Fund's investment  policies set forth in
the Prospectus.
     REPURCHASE  AGREEMENTS.  The Fund, along with other members of The Vanguard
Group, 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  security 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 can be  controlled  through
careful monitoring procedures.

     LENDING  OF  SECURITIES.  The Fund may lend  its  portfolio  securities  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 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 and the structure of such loans must be consistent  with the
1940 Act, and the Rules and  Regulations  or  interpretations  of the Commission
thereunder.  These  provisions limit the amount of securities a fund may lend to
33 1/3% of the Fund's total  assets,  and require that (a) the borrower  pledges
and maintains with the Fund  collateral  consisting of cash, a letter of credit,
or securities  issued or guaranteed  by the United  States  Government  having a
value at all times not less than 100% of the value of the securities loaned, (b)
the borrower adds 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
is made  subject  to  termination  by the  Fund at any  time,  and (d) the  Fund
receives reasonable interest on the loan (which may include the Fund's investing
any  cash  collateral  in  interest   bearing   short-term   investments),   any
distributions  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,
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.

                                      B-3
<PAGE>

     VANGUARD INTERFUND LENDING PROGRAM.  The Commission has issued an exemptive
order  permitting  the  Fund 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 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.
     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 deposit;  (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.
     FUTURES CONTRACTS AND OPTIONS.  The Fund may enter into futures  contracts,
options,  and options on futures contracts for several reasons: to maintain cash
reserves while  simulating full  investment,  to facilitate  trading,  to reduce
transaction  costs, or to seek higher investment returns when a futures contract
is priced  more  attractively  than the  underlying  equity  security  or index.
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 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 that
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 the 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 underlying  securities.  The Fund intends to use futures  contracts only for
bona fide hedging purposes.

                                      B-4
<PAGE>

     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 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 of the Fund to hedge its  portfolio  effectively.
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 risk of loss in trading  futures  contracts in some  strategies  can be
substantial, due to both the low margin deposits required and the extremely high
degree of leverage involved in futures pricing.  As a result, a relatively small
price  movement in a futures  contract may result in immediate  and  substantial
loss (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 also bears the risk that the Advisers
will  incorrectly  predict  future market trends.  However,  because the futures
strategies of the Fund are engaged in only for hedging  purposes,  the Fund will
not be  subject  to  the  risks  of  loss  frequently  associated  with  futures
transactions.  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 a 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 a 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 a fund has an open  position  in a futures  contract or related
option.
     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

                                      B-5
<PAGE>

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 futures  contracts held 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 ertain other
futures  contraxts  (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 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 foreign  currencies,  or other income  derived with respect to its
business of investing in securities or currencies.  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 payments.

     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 such  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.

     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

                                      B-6
<PAGE>


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
the 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.

     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  arrangements  for handling U.S.  securities of equal
value.
     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.  However,  these
foreign  withholding taxes are not expected to have a significant  impact on the
Fund,  since it seeks long-term  capital  appreciation  and any income should be
considered incidental.
     ILLIQUID AND  RESTRICTED  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
the  Commission's  rules,  may be sold only to qualified  institutional  buyers.
Because these securities can be resold only to qualified  institutional  buyers,
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  generally  includes
securities  that are  unregistered  that can be sold to qualified  institutional
buyers in accordance with Rule 144A under the Securities Act of 1933.  While the
Fund's investment adviser determines 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.

                               PURCHASE OF SHARES

The  purchase  price of shares of the Fund is the net asset value per share next
determined  after  the  order is  received.  The net  asset  value  per share is
calculated as of the close of the New York Stock Exchange (the Exchange) on each
day the Exchange is open for business.  An order  received prior to the close of
the Exchange  (generally  4:00 P.M.  Eastern time) will be executed at the price
computed on the date of receipt,  and an order  received  after the close of the
Exchange will be executed at the price  computed on the next day the Exchange is
open.
     The Fund  reserves  the right in its sole  discretion  (i) to  suspend  the
offering of its shares,  (ii) to reject  purchase orders when in the judgment of
management  such  rejection is in the best  interests of the Fund,  and (iii) to
reduce or waive the  minimum  investment  for,  or any  other  restrictions  on,
initial and  subsequent

                                      B-7
<PAGE>

investments  for certain  fiduciary  accounts such as employee  benefit plans 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.

                              REDEMPTION OF SHARES

The Fund may suspend  redemption  privileges or postpone the date of payment (i)
during any period  that 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 rules of the Commission as a result of which
it is not reasonably  practicable for the Fund to dispose of securities owned by
it, or fairly to  determine  the value of its  assets,  and (iii) for such other
periods as the Commission may permit.
     No charge is made by the Fund for redemptions. 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.
     If Vanguard  determines  that it would be detrimental to the best interests
of the remaining  shareholders  of the Fund to make payment  wholly or partly in
cash,  the  Fund  may  pay  the  redemption  price  in  whole  or in  part  by a
distribution in kind of readily  marketable  securities held by the Fund in lieu
of cash in conformity  with applicable  rules of the  Commission.  Investors may
incur brokerage charges on the sale of such securities so received in payment of
redemptions.  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.
     SIGNATURE GUARANTEES.  To protect your account, the Fund, and Vanguard from
fraud,  signature  guarantees  are required for certain  redemptions.  Signature
guarantees enable the Fund to verify the identity of a person who has authorized
a redemption from your account.  Signature guarantees are required in connection
with: (1) all redemptions,  regardless of the amount involved, when the proceeds
are to be paid to someone  other  than the  registered  owner(s);  and (2) share
transfer  requests.  These  requirements  are not  applicable to  redemptions in
Vanguard's  prototype plans except in connection  with: (1)  distributions  made
when the proceeds are to be paid to someone other than the plan participant; (2)
certain  authorizations to effect exchanges by telephone;  and (3) when proceeds
are to be  wired.  These  requirements  may be  waived  by the  Fund in  certain
instances.
     Signature  guarantees  can be obtained  from a bank,  broker,  or any other
guarantor that Vanguard  deems  acceptable.  Notaries  public are not acceptable
guarantors.
     The signature guarantees must appear either: (1) on the written request for
redemption;  (2) on a separate  instrument  for  assignment  (stock power) which
should  specify the total number of shares to be  redeemed;  or (3) on all stock
certificates  tendered for  redemption  and, if shares held by the Fund are also
being redeemed, on the letter of stock power.

                                      B-8
<PAGE>

                                  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 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  investments
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 indexes. 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.
     The share price for the Fund can be found daily in the mutual fund listings
of most major newspapers under the heading of Vanguard Funds.

                             YIELD AND TOTAL RETURN

The yield of the Vanguard  Explorer Fund for the thirty-day period ended October
31, 1999 was 0.37%.  The average annual total returns for the Fund for the one-,
five-,  and ten-year  periods ended October 31, 1999, were 25.14%,  12.86%,  and
12.86%, 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 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):

                                      B-9
<PAGE>

                               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
that would equate the initial amount invested to the after-tax value,  according
to the following formulas:

                                 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.

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):

                                      B-10
<PAGE>

                                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

                       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  outstanding  voting  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)
shares representing more than 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,  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 the Fund
may invest in stock  futures  contracts,  stock  options,  and  options on stock
futures  contracts.  No more than 5% of the Fund's  total  assets may be used as
initial margin deposit for futures contracts, and no more than 20% of the Fund's
total assets may be invested in 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 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 than 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.
     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.

                                      B-11
<PAGE>

     LOANS. The Fund may not lend money to any person except by purchasing fixed
income  securities or by entering  into  repurchase  agreements,  by lending its
portfolio securities, or through Vanguard's interfund lending program.
     MARGIN.  The Fund may not purchase  securities on margin or sell securities
short,  except as  permitted  by the  Fund's  investment  policies  relating  to
commodities.
     PLEDGING  ASSETS.  The Fund may not pledge,  mortgage,  or hypothecate more
than 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 and bonds secured
by real estate.
     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.
     None of these  limitations  prevents  the Fund  from  participating  in The
Vanguard Group  (Vanguard).  Because the Fund is a member of Vanguard,  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.
     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.

                             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 funds administered
by  Vanguard.  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,  and
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 & 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).

                                      B-12
<PAGE>

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 (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.

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 Fund, and the other funds 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 several of the Vanguard funds.
     Vanguard  employs  a  supporting  staff of  management  and  administrative
personnel  needed  to  provide  the  requisite  services  to the  funds and also
furnishes the funds with  necessary  office space,  furnishings,  and equipment.
Each fund pays its share of Vanguard's total expenses, which are allocated among
the funds under  procedures  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 was  established and operates under an Amended and Restated Funds'
Service  Agreement which was approved by the  shareholders of each of the funds.
The Amended and Restated  Funds'  Service  Agreement  provides for the following
arrangement:  (a) each Vanguard fund may be called upon to invest up to 0.40% of
its current net assets in Vanguard,  and (b) there is no other limitation on the
dollar   amount  that  each   Vanguard   fund  may   contribute   to  Vanguard's
capitalization.  The amounts  which each of the funds has  invested are adjusted
from time to time in order to maintain the  proportionate  relationship  between
each Fund's relative net assets and its contribution to Vanguard's  capital.  At
October 31, 1999,  Vanguard Explorer Fund had contributed capital of $530,000 to
Vanguard,  representing  0.02% of the Fund's  net assets and 0.5% 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

                                      B-13

<PAGE>

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
Vanguard,  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 The  Vanguard  Group.  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 funds based upon their relative net assets. The remaining
one half of these  expenses is allocated  among the funds based upon each fund's
sales for the preceding 24 months  relative to the total sales of the funds as a
group;   provided,   however,   that  no  fund's  aggregate  quarterly  rate  of
contribution  for  distribution  expenses of a marketing and promotional  nature
shall exceed 125% of the average  distribution  expense rate for  Vanguard,  and
that no fund shall incur annual distribution expenses in excess of 0.20 of 1% of
its average month-end net assets.
     During the fiscal years ended October 31, 1997,  1998,  and 1999,  Vanguard
Explorer Fund incurred the following approximate amounts of The Vanguard Group's
management  (including transfer agency),  distribution,  and marketing expenses:
$9,263,000, $10,360,000, and $11,114,000, respectively.

INVESTMENT ADVISORY SERVICES
Vanguard  provides  investment  advisory  services to the Fund and several other
Vanguard  funds.  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.

TRUSTEE COMPENSATION
The  same  individuals  serve  as  Trustees  of all  Vanguard  funds  (with  two
exceptions,  which are noted in the table appearing on page B-15), 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 TRUSTEES. 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"  TRUSTEES. 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-14
<PAGE>

                   VANGUARD EXPLORER FUND 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
Barbara Barnes
Hauptfuhrer(3)                $99                $13            $15,000                  $0
JoAnn Heffernan Heisen       $595                $33            $15,000             $80,000
Bruce K. MacLaury            $615                $55            $12,000             $75,000
Burton G. Malkiel            $599                $54            $15,000             $80,000
Alfred M. Rankin, Jr.        $595                $40            $15,000             $80,000
John C. Sawhill              $595                $50            $15,000             $80,000
James O. Welch, Jr.          $595                $58            $15,000             $80,000
J. Lawrence Wilson           $595                $42            $15,000             $80,000
</TABLE>
- ---------
(1)  The amounts  shown in this column are based on the Fund's fiscal year ended
     October 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  Vanguard  funds (102
     in the case of Mr. Malkiel; 93 in the case of Mr. MacLaury).
(3)  Mr.  Bogle  and  Mrs.  Hauptfuhrer  have  retired  from the  funds'  Board,
     effective December 31, 1999 and December 31, 1998, respectively.

                          INVESTMENT ADVISORY SERVICES

The Fund  currently  employs five  separate  investment  advisers,  each of whom
manages the investment and reinvestment of a portion of the Fund's assets. Until
February 28, 1990, when the Fund acquired the assets of Explorer II,  Wellington
Management  Company,  LLP was sole  investment  adviser to the Fund (then  known
simply as Explorer Fund),  and Granahan  Investment  Management,  Inc. served as
sole investment adviser to Explorer II, the acquired Fund.  Chartwell Investment
Partners and Vanguard  were added as advisers on August 1, 1997,  and  Grantham,
Mayo, Van Otterloo & Co. LLC was added on April 3, 2000.

     The  proportion  of the net assets of the Fund  managed by each adviser was
established  by the Board of  Trustees  and may be  changed in the future by the
Board of Trustees as  circumstances  warrant.  Investors  will be advised of any
substantive change in the proportions managed by each adviser.  Because the Fund
uses four advisers it is possible that the advisers  would  purchase or sell the
same  security at the same time.  Such a  situation  might  result in  increased
brokerage  costs or adverse tax  consequences to the Fund. The Board of Trustees
monitors   portfolio   activity  in  order  to  minimize  any  possible  adverse
consequences.

WELLINGTON MANAGEMENT COMPANY, LLP

The Fund has  entered  into an advisory  agreement  with  Wellington  Management
Company, LLP (Wellington  Management) under which Wellington  Management manages
the  investment  and  reinvestment  of a  portion  of  the  Fund's  assets  (the
Wellington  Management  Portfolio)  and  continuously  reviews,  supervises  and
administers the Fund's  investment  program with respect to those assets.  As of
December 31, 1999, Wellington Management managed approximately 29% of the Fund's
net assets. Wellington Management discharges its responsibilities subject to the
control of the officers and Trustees of the Fund.

     Wellington  Management is a professional  investment  counseling firm which
globally  provides  investment  services  to  investment   companies  and  other
institutions.   Wellington  Management  is  a  Massachusetts  limited  liability
partnership  of which the  following  persons are managing  partners:  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.

                                      B-15
<PAGE>

     Kenneth L. Abrams, Senior Vice President of Wellington  Management,  serves
as  portfolio  manager  of  the  assets  of  the  Fund  assigned  to  Wellington
Management. Mr. Abrams has been employed by Wellington Management since 1986 and
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  average  month-end  net  assets  of  the  Wellington
Management Portfolio for the quarter:

            NET ASSETS                                RATE
            ----------                                ----
            First $500 million ....................  .250%
            Next $250 million .....................  .200%
            Next $250 million .....................  .150%
            Assets in excess of $1 billion ........  .100%

     The Basic Fee,  as provided  above,  shall be  increased  or  decreased  by
applying an incentive/penalty fee adjustment based on the investment performance
of the Wellington Management Portfolio relative to the investment performance of
the Small Company  Growth Fund Stock Index (the Index).  Prior to July 31, 1997,
Wellington  Management's fees were calculated by using the Russell 2000 Index as
a performance benchmark.  Beginning with the quarter ended October 31, 1997, the
"new"  benchmark  (Small  Company  Growth Fund Stock Index) was phased in over a
36-month period by calculating  Wellington  Management's  incentive/penalty  fee
based on the linked performance of new and old benchmarks.
     The following table sets forth the adjustment  factors to the base advisory
fee payable by the Fund to Wellington  Management  under the current  investment
advisory agreement:

            THREE-YEAR CUMULATIVE PERFORMANCE              PERFORMANCE FEE
            DIFFERENTIAL VERSUS THE INDEX                       ADJUSTMENT
            -----------------------------                       ----------
            Trails by -12% or more ..................... -0.50 X Basic Fee
            Trails by more than -6% up to -12% ......... -0.25 X Basic Fee
            Trails/exceeds from -6% through 6% .........  0.00 X Basic Fee
            Exceeds by more than 6% but less than 12% .. +0.25 X Basic Fee
            Exceeds by 12% or more ..................... +0.50 X Basic Fee

     The investment  performance of the Wellington  Management Portfolio for any
period,  expressed as a percentage of the "Wellington  Management Portfolio unit
value" at the  beginning  of such  period,  is the sum of: (i) the change in the
Wellington  Management  Portfolio  unit value during such period;  (ii) the unit
value of the Fund's cash distributions from the Wellington  Management Portfolio
net  investment  income and realized  net capital  gains  (whether  long-term or
short-term)  having an ex-dividend date occurring within such period;  and (iii)
the unit value of capital gains taxes paid or accrued  during such period by the
Fund for  undistributed  realized  long-term  capital  gains  realized  from the
Wellington Management Portfolio.
     The  Wellington  Management  Portfolio unit value is determined by dividing
the total net assets of the Wellington Management Portfolio by a given number of
units.  Pursuant to the Fund's  investment  advisory  agreement with  Wellington
Management  dated  February  28,  1990,  the  number of units in the  Wellington
Management Portfolio originally equaled the total shares outstanding of the Fund
on that date. As assets are added to or withdrawn from the Wellington Management
Portfolio,  the  number  of  units of the  Wellington  Management  Portfolio  is
adjusted based on the unit value of the Wellington  Management  Portfolio on the
day such changes are executed.
     The  investment  record  of the  Index  or  Russell  2000  for any  period,
expressed as a percentage  of the Index or Russell 2000 at the beginning of such
period,  is the sum of (i) the change in the level of the Index or Russell  2000
during such period and (ii) the value,  computed  consistently with the Index or
Russell 2000, of cash distributions  having an ex-dividend date occurring within
such period made by  companies  whose  securities  comprise the Index or Russell
2000.
     During the fiscal years ended October 31, 1997,  1998,  and 1999,  the Fund
paid Wellington Management the following advisory fees:

                                     B-16
<PAGE>


                                                 1997        1998        1999
                                                 ----        ----        ----
      Basic Fee                            $1,950,387  $1,647,928  $1,588,542
      Increase/(Decrease) for Performance     (89,408)   (288,253)    659,915
      Adjustment                           ----------------------------------
      Total                                $1,860,979  $1,359,675  $2,248,457
                                           ----------------------------------
                                           ----------------------------------

GRANAHAN INVESTMENT MANAGEMENT, INC.

On February 28, 1990,  effective with the  acquisition of the assets of Explorer
II, the Fund  retained  Granahan  Investment  Management,  Inc.  (Granahan) as a
second investment adviser.  Under its advisory agreement with the Fund, Granahan
manages the investment and  reinvestment  of a portion of the Fund's assets (the
Granahan Portfolio) and continuously  reviews,  supervises,  and administers the
Fund's investment program with respect to those assets. As of December 31, 1999,
Granahan managed approximately 44% of the Fund's net assets. Granahan discharges
its responsibilities  subject to the control of the officers and Trustees of the
Fund.

     Granahan  Investment  Management,  Inc.,  is an  investment  advisory  firm
specializing  in small  company  stock  investments.  Mr.  John  Granahan is the
President and major stockholder of Granahan Investment Management, Inc.
     The Fund  pays  Granahan  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 of the Granahan  Portfolio
for the quarter:

            NET ASSETS                                RATE
            ----------                                ----
            First $500 million .....................  .300%
            Next $250 million ......................  .200%
            Next $250 million ......................  .150%
            Assets in excess of $1 billion .........  .100%

     The Basic Fee paid to Granahan may be increased or decreased by applying an
adjustment formula based on the investment  performance of the net assets of the
Granahan Portfolio  relative to the investment  performance of the Small Company
Growth Fund Stock Index (the  Index).  The  incentive  portion of the fee may be
earned  even if the  performance  of the  Granahan  Portfolio  for the period is
negative  provided  that the  Portfolio's  performance  exceeds the Index by the
required percentage.  Prior to July 31, 1997, Granahan's fees were calculated by
using the Russell  2000 Index as a  performance  benchmark.  Beginning  with the
quarter ended October 31, 1997, the "new"  benchmark  (Small Company Growth Fund
Stock  Index)  was phased in over a 36-month  period by  calculating  Granahan's
incentive/penalty  fee  based  on the  linked  performance  of the  new  and old
benchmarks.
     The following table sets forth the adjustment  factors to the base advisory
fee payable by the Fund to Granahan under this investment advisory agreement:

      CUMULATIVE 36-MONTH PERFORMANCE            PERFORMANCE FEE
      DIFFERENTIAL VERSUS THE INDEX              ADJUSTMENT
      -----------------------------              ----------
      Trails by -12% or more ................... Decrease by .01875%
      Trails by more than -6% up to -12% ....... Decrease by .009375%
      Trails/exceeds from -6% through 6% ....... No Adjustment
      Exceeds by more than 6% but less than 12%. Increase by .009375%
      Exceeds by 12% or more ................... Increase by .01875%

     The  investment  performance  of the  Granahan  Portfolio  for any  period,
expressed  as a  percentage  of  the  "Granahan  Portfolio  unit  value"  at the
beginning  of such  period,  is the  sum of:  (i)  the  change  in the  Granahan
Portfolio unit value during such period;  (ii) the unit value of the Fund's cash
distributions from the Granahan Portfolio net investment income and realized net
capital gains  (whether  long-term or  short-term)  having an  ex-dividend  date
occurring  within such period;  and (iii) the unit value of capital  gains taxes
paid or  accrued  during  such  period  by the Fund for  undistributed  realized
long-term capital gains realized from the Granahan Portfolio.

                                      B-17
<PAGE>

     The Granahan  Portfolio  unit value is determined by dividing the total net
assets of the Granahan  Portfolio  by a given  number of units.  Pursuant to the
Fund's investment  advisory agreement with Granahan dated February 28, 1990, the
number of units in the Granahan Portfolio  originally  equalled the total shares
outstanding  of the Fund on that date. As assets are added to or withdrawn  from
the  Granahan  Portfolio,  the  number  of units of the  Granahan  Portfolio  is
adjusted  based on the  unit  value of the  Granahan  Portfolio  on the day such
changes are executed.

     The  investment  record  of the  Index  or  Russell  2000  for any  period,
expressed as a percentage  of the Index or Russell 2000 at the beginning of such
period,  is the sum of (i) the change in the level of the Index or Russell  2000
during such period and (ii) the value,  computed  consistently with the Index or
Russell 2000, of cash distributions  having an ex-dividend date occurring within
such period made by  companies  whose  securities  comprise the Index or Russell
2000.
     The Index shall not be fully operable as the performance  benchmark used to
determine  Granahan's  performance fee adjustment  until the quarter ending July
31,  2000.  Until that date,  Granahan's  performance  fee  adjustment  shall be
determined by linking the  investment  performance  of the Index and that of the
Russell 2000 as follows:
(A)  QUARTER ENDED OCTOBER 31, 1997.  Granahan's  performance fee adjustment was
     determined by linking the  investment  performance  of the Russell 2000 for
     the  eleven  quarters  ended  July 31,  1997 with that of the Index for the
     quarter ended October 31, 1997.
(B)  QUARTER ENDED JANUARY 31, 1998.  Granahan's  performance fee adjustment was
     determined by linking the  investment  performance  of the Russell 2000 for
     the ten  quarters  ended  July 31,  1997 with that of the Index for the two
     quarters ended January 31, 1998.
(C)  QUARTER ENDED APRIL 30, 1998.  Granahan's  performance  fee  adjustment was
     determined by linking the  investment  performance  of the Russell 2000 for
     the nine quarters  ended July 31, 1997 with that of the Index for the three
     quarters ended April 30, 1998.
(D)  QUARTER ENDED JULY 31, 1998.  Granahan's  performance  fee  adjustment  was
     determined by linking the  investment  performance  of the Russell 2000 for
     the eight  quarters ended July 31, 1997 with that of the Index for the four
     quarters ended July 31, 1998.
(E)  QUARTER ENDED OCTOBER 31, 1998.  Granahan's  performance fee adjustment was
     determined by linking the  investment  performance  of the Russell 2000 for
     the seven  quarters ended July 31, 1997 with that of the Index for the five
     quarters ended October 31, 1998.
(F)  QUARTER ENDED JANUARY 31, 1999.  Granahan's  performance fee adjustment was
     determined by linking the  investment  performance  of the Russell 2000 for
     the six  quarters  ended  July 31,  1997 with that of the Index for the six
     quarters ended January 31, 1999.
(G)  QUARTER ENDED APRIL 30, 1999.  Granahan's  performance  fee  adjustment was
     determined by linking the  investment  performance  of the Russell 2000 for
     the five quarters  ended July 31, 1997 with that of the Index for the seven
     quarters ended April 30, 1999.
(H)  QUARTER ENDED JULY 31, 1999.  Granahan's  performance  fee  adjustment  was
     determined by linking the  investment  performance  of the Russell 2000 for
     the four quarters  ended July 31, 1997 with that of the Index for the eight
     quarters ended July 31, 1999.
(I)  QUARTER ENDED OCTOBER 31, 1999.  Granahan's  performance fee adjustment was
     determined by linking the  investment  performance  of the Russell 2000 for
     the three  quarters ended July 31, 1997 with that of the Index for the nine
     quarters ended October 31, 1999.

(J)  QUARTER ENDED JANUARY 31, 2000.  Granahan's  performance fee adjustment was
     determined by linking the  investment  performance  of the Russell 2000 for
     the two  quarters  ended  July 31,  1997 with that of the Index for the ten
     quarters ended January 31, 2000.
(K)  QUARTER ENDED APRIL 30, 2000.  Granahan's  performance fee adjustment shall
     be determined by linking the investment performance of the Russell 2000 for
     the  quarter  ended  July 31,  1997 with  that of the Index for the  eleven
     quarters ended April 30, 2000.

(L)  QUARTER ENDING JULY 31, 2000. The Index shall be fully operable.

                                      B-18
<PAGE>

     During the fiscal years ended October 31, 1997,  1998,  and 1999,  the Fund
paid Granahan the following advisory fees:

                                                 1997        1998         1999
                                                 ----        ----         ----
      Basic Fee                            $2,532,966  $2,508,538   $2,476,006
      Increase/(Decrease) for Performance
        Adjustment                           (242,952)   (479,000)           0
                                          ------------------------------------
      Total                                $2,290,014  $2,029,538   $2,476,006
                                          ------------------------------------

CHARTWELL INVESTMENT PARTNERS

The  Fund  also  employs  Chartwell  Investment  Partners  (Chartwell)  under an
investment  advisory  agreement to manage the investment and  reinvestment  of a
portion of the  Fund's  assets.  As of  December  31,  1999,  Chartwell  managed
approximately   13%   of   the   Fund's   assets.   Chartwell   discharges   its
responsibilities  subject to the  control of the  officers  and  Trustees of the
Fund.

     For the services  provided by Chartwell  under the advisory  agreement  the
Fund pays Chartwell 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 of the Chartwell Portfolio for the quarter:

            NET ASSETS                                    RATE
            ----------                                    ----
            First $250 million ......................... 0.40%
            Next $250 million .......................... 0.30%
            Assets in excess of $500 million ........... 0.20%

     Effective  with the quarter  ended July 31, 1998 the Basic Fee, as provided
above, is increased or decreased by applying an incentive/penalty fee adjustment
based on the investment  performance of the Chartwell  Portfolio relative to the
investment performance of the Small Company Growth Fund Stock Index (the Index).
The  following  table sets forth the fee payable by the Fund to Chartwell  based
upon the incentive/penalty adjustment:

            THREE-YEAR CUMULATIVE PERFORMANCE              PERFORMANCE FEE
            DIFFERENTIAL VERSUS THE INDEX                       ADJUSTMENT
            -----------------------------                       ----------
            Trails by -12% or more ..................... -0.20 X Basic Fee
            Trails by more than -6% up to -12% ......... -0.10 X Basic Fee
            Trails/exceeds from -6% through 6% .........  0.00 X Basic Fee
            Exceeds by more than 6% but less than 12% .. +0.10 X Basic Fee
            Exceeds by 12% or more ..................... +0.20 X Basic Fee

     Through the quarter  ending July 31, 2000,  the  incentive/penalty  fee for
Chartwell will be calculated according to the following transition rules:

(A)  AUGUST 1, 1997 THROUGH  APRIL 30, 1998.  Beginning  with the quarter  ended
     October 31, 1997 and through the quarter ended April 30, 1998, there was no
     Performance Fee Adjustment.
(B)  MAY 1, 1998 THROUGH JULY 31, 2000.  Beginning  with the quarter  ended July
     31, 1998 and through the quarter ending July 31, 2000, the  Performance Fee
     Adjustment  is  computed   based  upon  a  comparison  of  the   investment
     performance  of the  Chartwell  Portfolio  and that of the  Index  over the
     number of quarters that have elapsed  between August 1, 1997 and the end of
     the quarter for which the fee is computed.  During this period,  the number
     of percentage  points by which the investment  performance of the Chartwell
     Portfolio must exceed or trail the  investment  performance of the Index at
     each Performance Fee Adjustment level shall be determined on the basis of a
     fraction applied to the performance differentials shown in the above table.
     For each quarter,  this fraction shall equal the number of quarters elapsed
     since August 1, 1997 divided by twelve.
(C)  ON AND AFTER  JULY 31,  2000.  For the  quarter  ending  July 31,  2000 and
     thereafter,  the period used to calculate the  Performance  Fee  Adjustment
     shall be the 36 months  through the end of the quarter for which the fee is
     being computed and the number of percentage  points used shall be as stated
     in the table above.

                                      B-19
<PAGE>

     The  investment  performance  of the Fund,  for any period,  expressed as a
percentage  of the  "Chartwell  Portfolio  Unit Value" at the  beginning of such
period, will be the sum of: (i) the change in the Chartwell Portfolio Unit Value
during such period;  (ii) the unit value of the Fund's cash  distributions  from
the Fund's net  investment  income  and  realized  net  capital  gains  (whether
long-term  or  short-term)  having an  ex-dividend  date  occurring  within such
period;  and (iii) the unit value of taxes paid including  withholding taxes and
capital  gains  taxes  paid or  accrued  during  such  period  by the  Fund  for
undistributed realized long-term capital gains realized from the Fund.
     The Chartwell  Portfolio Unit Value is determined by dividing the total net
assets of the  Chartwell  Portfolio by a given  number of units.  On the initial
date of the agreement, the number of units in the Fund equalled the total shares
outstanding  of the Fund. As assets are added to or withdrawn from the Chartwell
Portfolio,  the number of units of the Chartwell  Portfolio is adjusted based on
the unit value of the Chartwell Portfolio on the day such changes are executed.
     For the period  August 1, 1997 to October 31,  1997,  and the fiscal  years
ended October 31, 1998 and 1999, the Fund paid Chartwell Investment Partners the
following advisory fees:

                                     AUG. 1-OCT. 31
                                               1997        1998         1999
                                               ----        ----         ----
      Basic Fee                            $202,329    $952,259   $1,042,721
      Increase/(Decrease) for
        Performance Adjustment                    0     (71,146)      70,879
                                  ------------------------------------------
      Total                                $202,329    $881,113   $1,113,600
                                  ------------------------------------------

GRANTHAM, MAYO, VAN OTTERLOO & CO. LLC
The Fund also  employs  Grantham,  Mayo,  Van  Otterloo & Co. LLC (GMO) under an
investment  advisory  agreement to manage the investment and  reinvestment  of a
portion of the Fund's assets. GMO discharges its responsibilities subject to the
control of the officers and Trustees of the Fund.
     The Fund pays GMO 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 of the GMO Portfolio for the quarter:

            NET ASSETS                                    RATE
            ----------                                    ----
            First $500 million ......................... 0.275%
            Next $500 million .......................... 0.225%
            Assets in excess of $1 billion ............. 0.200%

     Subject to the transition rule described  below, the Basic Fee, as provided
above,  will be  increased  or  decreased  by the  amount of a  Performance  Fee
Adjustment ("Adjustment").  The Adjustment will be calculated as a percentage of
the average net assets  managed by GMO for the 36-month  period  ending with the
then-ended  quarter,  and the Adjustment  will change  proportionately  with the
investment   performance  of  the  GMO  Portfolio  relative  to  the  investment
performance  of the Russell 2000 Growth Index (the "Index") for the same period.
The Adjustment is computed as follows:

CUMULATIVE 36-MONTH PERFORMANCE                   ADJUSTMENT AS A PERCENTAGE
VERSUS THE INDEX                                          OF AVERAGE ASSETS*
- ----------------                                          ------------------

Trails by any amount ...................                              -0.15%
Equals-to-exceeds by up to 3% ..........   Linear decrease from 0% to -0.15%
Exceeds by 3% to 6% ....................   Linear increase from 0% to +0.15%
Exceeds by more than 6% ................                              +0.15%
- ---------------------------
*For purposes of this calculation,  the Adjustment is calculated by applying the
 quarterly  rate against the net assets of the GMO Portfolio  over the same time
 period for which the performance is measured.


                                      B-20
<PAGE>


     The  Adjustment  will not be fully  operable until the close of the quarter
ending April 30, 2003.  Until that time,  the  following  transition  rules will
apply:

(A)  APRIL 3, 2000 THROUGH  JANUARY 31,  2001.  GMO's  compensation  will be the
     Basic Fee. No Adjustment will apply during this period.
(B)  FEBRUARY 1, 2001 THROUGH APRIL 30, 2003.  Beginning  February 1, 2001,  the
     Adjustment  will take  effect on a  progressive  basis with  regards to the
     number of months  elapsed  between  May 1, 2000,  and the quarter for which
     GMO's fee is being  computed.  During this period,  the Adjustment that has
     been  determined as provided  above will be  multiplied by a fraction.  The
     fraction's  numerator  will equal the number of months elapsed since May 1,
     2000 and the denominator will be thirty-six (36).
(C)  ON AND AFTER MAY 1, 2003.  Commencing May 1, 2003,  the Adjustment  will be
     fully operable.
     The investment  performance of the GMO Portfolio for any period,  expressed
as a  percentage  of the "GMO  Portfolio  unit value" at the  beginning  of such
period will be the sum of:  (i) the  change in the GMO  Portfolio  unit value
during such period;  (ii) the unit value of the Fund's cash  distributions  from
the GMO  Portfolio's  net  investment  income and  realized  net  capital  gains
(whether  long-term or short-term)  having an ex-dividend  date occurring within
such  period;  and (iii) the unit value of capital  gains  taxes paid or accrued
during  such period by the Fund for  undistributed  realized  long-term  capital
gains realized from the GMO Portfolio.
     The "GMO Portfolio unit value" will be determined by dividing the total net
assets of the GMO Portfolio by a given number of units. Initially, the number of
units in the GMO Portfolio  will equal a nominal value as determined by dividing
initial  assets by a unit value of $100.00  on April 3, 2000.  Subsequently,  as
assets are added to or withdrawn from the GMO Portfolio,  the number of units of
the GMO Portfolio  will be adjusted based on the unit value of the GMO Portfolio
on the day such changes are  executed.  Any cash buffer  maintained  by the Fund
outside of the GMO  Portfolio  shall neither be included in the total net assets
of the GMO Portfolio nor included in the  computation of the "GMO portfolio unit
value."
     The  investment  record  of  the  Index  for  any  period,  expressed  as a
percentage  of the Index at the  beginning of such period,  shall be the sum of:
(i) the change in the level of the Index during such period, and (ii) the value,
computed   consistently  with  the  Index,  of  cash  distributions   having  an
ex-dividend date occurring within such period made by companies whose securities
comprise the Index. For this purpose, cash distributions on the securities which
comprise  the Index  shall be  treated  as  reinvested  in the Index at least as
frequently  as the end of each  calendar  quarter  following  the payment of the
dividend.

THE VANGUARD GROUP, INC.
Vanguard's Core Management  Group provides  investment  advisory  services on an
at-cost basis with respect to 9% (as of December 31, 1999) of Vanguard  Explorer
Fund's  assets,  and any cash  reserves  held by the Fund (5% as of December 31,
1999).  Vanguard's  Core  Management  Group is supervised by the officers of the
funds.

     For the period  August 1, 1997 to October 31,  1997,  and the fiscal  years
ended  October 31, 1998 and 1999,  the Fund  incurred  expenses  for  investment
advisory  services  provided by Vanguard in the following  approximate  amounts:
$2,000, $38,000, and $170,000, respectively.

DURATION AND TERMINATION OF INVESTMENT ADVISORY AGREEMENTS

The Fund's current agreements with Wellington Management,  Granahan,  Chartwell,
GMO, and Vanguard are renewable for  successive  one year periods,  only if each
renewal is  specifically  approved  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. An agreement is automatically terminated if assigned,
and may be  terminated  without  penalty  at any time (1)  either by vote of the
Board of Trustees of the Fund on 60 days' written notice to the adviser,  or (2)
by the adviser upon 90 days' written notice to the Fund.

                                      B-21

<PAGE>

                             PORTFOLIO TRANSACTIONS

The Advisers are authorized  (with the approval of the Fund's Board of Trustees)
to select the brokers or dealers  that will execute the  purchases  and sales of
portfolio  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.
     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  agreements  but are  unable  to
determine the amount by which such services may reduce their 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 Fund's Board of Trustees, the Advisers may cause the Fund to pay
a broker-dealer  which furnishes 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 funds 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 Fund  that  they  generally  will  not pay  higher
commission rates specifically for the purpose of obtaining research services.
     During the fiscal years ended October 31, 1997,  1998,  and 1999,  the Fund
paid   $3,057,037,   $3,023,496,   and  $3,178,526  in  brokerage   commissions,
respectively.
     Some  securities  considered  for  investment  by  the  Fund  may  also  be
appropriate  for other Vanguard funds and/or clients served by each Adviser.  If
purchase or sale of securities  consistent  with the investment  policies of the
Fund and one or more of these other funds or clients  served 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.  Although there may be no specified  formula for  allocating  such
transactions,  the allocation methods used, and the results of such allocations,
will be subject to periodic review by the Fund's Board of Trustees.

                              COMPARATIVE INDEXES

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

SMALL  COMPANY  GROWTH FUND STOCK  INDEX--is  composed  of the various  domestic
common  stocks that are held in the 25 largest small company stock mutual funds,
using  year-end net assets,  monitored by  Morningstar,  Inc. Under an agreement
with the Fund,  Morningstar,  Inc.  determines the  composition of the Index and
Vestek Systems calculates the monthly total return.  Neither The Vanguard Group,
Inc.,  Wellington  Management,  Granahan,  nor  Chartwell  are  affiliated  with
Morningstar or Vestek Systems in any way.

STANDARD & POOR'S 500 COMPOSITE STOCK PRICE  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  MIDCAP 400  INDEX--is  composed of 400 medium sized  domestic
stocks.

                                      B-22
<PAGE>

STANDARD & POOR'S 500/BARRA VALUE  INDEX--consists of the stocks in the Standard
and  Poor's  500  Composite   Stock  Price  Index  (S&P  500)  with  the  lowest
price-to-book  ratios,  comprising 50% of the market  capitalization  of the S&P
500.

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

WILSHIRE  4500  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 a market weighted index that
contains  individually  priced U.S.  Treasury  securities 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 $100  million  outstanding.  This index
includes over 1,500 issues.

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
$100 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
of four high-grade, noncallable preferred stock issues.

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

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

COMPOSITE  INDEX--65%  Standard  & Poor's  500  Index  and 35%  Lehman  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).


                                      B-23
<PAGE>


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.

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
$5 trillion.

LEHMAN  BROTHERS  MUTUAL  FUND  SHORT  (1-5)  GOVERNMENT/CORPORATE  INDEX--is  a
market-weighted index that contains  individually priced U.S. Treasury,  agency,
and  corporate  investment  grade  bonds  rated BBB- or better  with  maturities
between 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 $800 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 $1.1 trillion.

LIPPER SMALL  COMPANY  GROWTH 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.)

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--is   composed   of   approximately   2,000  small
capitalization stocks.

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 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.

                              FINANCIAL STATEMENTS

The Fund's  audited  Financial  Statements  for the year ended October 31, 1999,
including  the  financial  highlights  for each of the five fiscal  years in the
period ended  October 31, 1999,  appearing  in the Vanguard  Explorer  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.



                                                               SAI024-05/30/2000


                                      B-24
<PAGE>

                                     PART C

                             VANGUARD EXPLORER FUND
                               OTHER INFORMATION

ITEM 23. EXHIBITS
(a)    Declaration of Trust**
(b)    By-Laws**
(c)    Reference is made to Articles III and V of the Registrant's Declaration
       of Trust
(d)    Investment Advisory Contracts+
(e)    Not applicable
(f)    Reference is made to the section entitled "Management of the Fund" in the
       Registrant's Statement of Additional Information
(g)    Custodian Agreements**
(h)    Amended and Restated Funds' Service Agreement**
(i)    Legal Opinion**
(j)    Consent of Independent Accountants**
(k)    Not Applicable
(l)    Not Applicable
(m)    Not Applicable
(n)    Not Applicable
(o)    Not Applicable
(p)    Codes of Ethics*
 -----------
  * Filed herewith for The Vanguard Group, Inc. and Grantham, Mayo, Van Otterloo
    & Co. LLC; to be filed by amendment for the other Investment Advisers
 ** Filed previously
  + Filed herewith for Grantham, Mayo, Van  Otterloo & Co. LLC; filed previously
    for the other Investment Advisers

ITEM 24. PERSONS CONTROLLED BY OR UNDER COMMON CONTROL WITH REGISTRANT
Registrant is not controlled by or under common control with any person.

ITEM 25. INDEMNIFICATION
The  Registrant's   organizational  documents  contain  provisions  indemnifying
Trustees and officers  against  liability  incurred in their official  capacity.
Article VII,  Section 2 of the Declaration of Trust provides that the Registrant
may  indemnify  and hold  harmless  each and every  Trustee and officer from and
against  any and all  claims,  demands,  costs,  losses,  expenses,  and damages
whatsoever  arising out of or related to the performance of his or her duties as
a Trustee or officer.  However,  this  provision does not cover any liability to
which a Trustee  or  officer  would  otherwise  be  subject by reason of willful
misfeasance,  bad faith,  gross negligence,  or reckless disregard of the duties
involved  in  the  conduct  of  his or her  office.  Article  VI of the  By-Laws
generally provides that the Registrant shall indemnify its Trustees and officers
from  any  liability  arising  out of  their  past or  present  service  in that
capacity.  Among other things,  this provision excludes any liability arising by
reason of willful  misfeasance,  bad faith,  gross  negligence,  or the reckless
disregard  of the duties  involved in the conduct of the  Trustee's or officer's
office with the Registrant.

                                      C-1
<PAGE>

ITEM 26. BUSINESS AND OTHER CONNECTIONS OF INVESTMENT ADVISER

Wellington  Management  Company,  LLP  (Wellington  Management) is an investment
adviser  registered  under the Investment  Advisers Act of 1940, as amended (the
Advisers  Act).  The list  required by this Item 26 of officers  and partners of
Wellington  Management,  together  with  any  information  as  to  any  business
profession,  vocation,  or employment of a substantial nature engaged in by such
officers  and  partners  during the past two years,  is  incorporated  herein by
reference  from  Schedules  B and D of Form ADV filed by  Wellington  Management
pursuant to the Advisers Act (SEC File No. 801-15908).
     Granahan  Investment  Management,  Inc. (Granahan) is an investment adviser
registered under the Advisers Act. The list required by this Item 26 of officers
and  directors of Granahan,  together  with any  information  as to any business
profession,  vocation,  or employment of a substantial nature engaged in by such
officers and  directors  during the past two years,  is  incorporated  herein by
reference from  Schedules B and D of Form ADV filed by Granahan  pursuant to the
Advisers Act (SEC File No. 801-23705).
     Chartwell   Investment  Partners   (Chartwell)  is  an  investment  adviser
registered under the Advisers Act. The list required by this Item 26 of officers
and partners of  Chartwell,  together  with any  information  as to any business
profession,  vocation,  or employment of a substantial nature engaged in by such
officers  and  partners  during the past two years,  is  incorporated  herein by
reference from Schedules B and D of Form ADV filed by Chartwell  pursuant to the
Advisers Act (SEC File No. 801-54124).
     The Vanguard Group,  Inc.  (Vanguard) is an investment  adviser  registered
under the  Advisers  Act.  The list  required  by this Item 26 of  officers  and
directors  of  Vanguard,  together  with  any  information  as to  any  business
profession,  vocation,  or employment of a substantial nature engaged in by such
officers and  directors  during the past two years,  is  incorporated  herein by
reference from  Schedules B and D of Form ADV filed by Vanguard  pursuant to the
Advisers Act (SEC File No. 801-11953).

     Grantham,  Mayo,  Van  Otterloo  & Co. LLC (GMO) is an  investment  adviser
registered under the Advisers Act. The list required by this Item 26 of officers
and  directors  of  GMO,  together  with  any  information  as to  any  business
profession,  vocation,  or employment of a substantial nature engaged in by such
officers and  directors  during the past two years,  is  incorporated  herein by
reference  from  Schedules  B and D of Form  ADV  filed by GMO  pursuant  to the
Advisers Act (SEC File No. 801-15028).

ITEM 27. PRINCIPAL UNDERWRITERS
(a)    Not Applicable
(b)    Not Applicable
(c)    Not Applicable

ITEM 28. LOCATION OF ACCOUNTS AND RECORDS

The books, accounts, and other documents required to be maintained by Section 31
(a) of the Investment  Company Act and the rules promulgated  thereunder will be
maintained  at the  offices of  Registrant;  Registrant's  Transfer  Agent,  The
Vanguard Group, Inc., 100 Vanguard Boulevard,  Malvern,  Pennsylvania 19355; and
the Registrant's  Custodian,  State Street Bank and Trust Company,  225 Franklin
Street, Boston, Massachusetts 02110.

ITEM 29. MANAGEMENT SERVICES
Other than as set forth under the description of The Vanguard Group in Part B of
this   Registration   Statement,   the   Registrant   is  not  a  party  to  any
management-related service contract.

ITEM 30. UNDERTAKINGS
Not Applicable

                                      C-2

<PAGE>

                                   SIGNATURES

Pursuant to the  requirements  of the  Securities Act of 1933 and the Investment
Company Act of 1940,  the  Registrant  hereby  certifies that it has duly caused
this Post-Effective Amendment to this Registration Statement to be signed on its
behalf by the  undersigned,  thereunto  duly  authorized,  in the Town of Valley
Forge and the Commonwealth of Pennsylvania, on the 27th day of March, 2000.

                                                   VANGUARD EXPLORER FUND

                                            BY:_________________________________
                                                          (signature)
                                                         (HEIDI STAM)
                                                       JOHN J. BRENNAN*
                                            CHAIRMAN AND CHIEF EXECUTIVE OFFICER


     Pursuant  to  the   requirements  of  the  Securities  Act  of  1933,  this
Post-Effective  Amendment to the Registration Statement has been signed below by
the following persons in the capacities and on the date indicated:

SIGNATURE                     TITLE                           DATE
- --------------------------------------------------------------------------------

By:/S/ JOHN J. BRENNAN        President, Chairman, Chief      March 27, 2000
   ---------------------------  Executive Officer, and Trustee
       (Heidi Stam)
      John J. Brennan*


By:/S/ JOANN HEFFERNAN HEISEN Trustee                         March 27, 2000
   ---------------------------
       (Heidi Stam)
     JoAnn Heffernan Heisen*


By:/S/ BRUCE K. MACLAURY      Trustee                         March 27, 2000
   ---------------------------
       (Heidi Stam)
      Bruce K. MacLaury*


By:/S/ BURTON G. MALKIEL      Trustee                         March 27, 2000
   ---------------------------
       (Heidi Stam)
       Burton G. Malkiel*


By:/S/ ALFRED M. RANKIN, JR.  Trustee                         March 27, 2000
   ---------------------------
       (Heidi Stam)
     Alfred M. Rankin, Jr.*


By:/S/ JOHN C. SAWHILL        Trustee                         March 27, 2000
   ---------------------------
       (Heidi Stam)
      John C. Sawhill*


By:/S/ JAMES O. WELCH, JR.    Trustee                         March 27, 2000
   ---------------------------
       (Heidi Stam)
     James O. Welch, Jr.*


By:/S/ J. LAWRENCE WILSON     Trustee                         March 27, 2000
   ---------------------------
       (Heidi Stam)
     J. Lawrence Wilson*


By:/S/ THOMAS J. HIGGINS      Treasurer and Principal         March 27, 2000
   ---------------------------  Financial Officer and
       (Heidi Stam)             Principal Accounting Officer
      Thomas J. Higgins*

*By Power of  Attorney.  See File Number  33-4424,  filed on January  25,  1999.
 Incorporated by Reference.

<PAGE>

                               INDEX TO EXHIBITS

Form of Investment Advisory Contract................................... Ex-99.BD
Codes of Ethics........................................................ Ex-99.BP





                                    FORM OF
                          INVESTMENT ADVISORY AGREEMENT

     AGREEMENT,  made  as of this  3rd  day of  April,  2000,  between  VANGUARD
EXPLORER FUND, a Delaware business trust (the "Fund"),  and Grantham,  Mayo, Van
Otterloo & Co. LLC, a ______________ limited liability corporation ("Adviser").

     WHEREAS, the Fund is an open-end, diversified management investment company
registered  under the  Investment  Company  Act of 1940,  as amended  (the "1940
Act"); and

     WHEREAS,  the Fund desires to retain Adviser to render investment  advisory
services  to certain  assets of the Fund which the Board of Trustees of the Fund
determines  to assign to  Adviser  (referred  to in this  Agreement  as the "GMO
Portfolio"), and Adviser is willing to render such services;

     NOW, THEREFORE, this Agreement

                               W I T N E S S E T H

that in consideration of the premises and mutual promises hereinafter set forth,
the parties hereto agree as follows:

     1.  APPOINTMENT OF ADVISER.  The Fund hereby employs  Adviser as investment
adviser,  on the terms and  conditions  set forth herein,  for the assets of the
Fund that the Board of Trustees  determines  to assign to Adviser.  The Board of
Trustees may, from time to time,  make additions to, and  withdrawals  from, the
assets of the Fund  assigned to Adviser.  Adviser  accepts such  employment  and
agrees to render the  services  herein set forth,  for the  compensation  herein
provided.

     2. DUTIES OF ADVISER. The Fund employs Adviser to manage the investment and
reinvestment  of the  assets  of the  GMO  Portfolio,  to  continuously  review,
supervise and  administer an investment  program for such assets of the Fund, to
determine  in its  discretion  the  securities  to be  purchased or sold and the
portion  of such  assets to be held  uninvested,  to  provide  the Fund with all
records  concerning  the  activities  of Adviser  that the Fund is  required  to
maintain,  and to render  regular  reports to the Fund's  officers  and Board of
Trustees  concerning  the discharge of the foregoing  responsibilities.  Adviser
will  discharge  the  foregoing  responsibilities  subject to the control of the
officers  and the Board of  Trustees  of the Fund,  and in  compliance  with the
objectives,  policies and  limitations set forth in the Fund's  prospectus,  any
additional  operating  policies or procedures that the Fund  communicates to the
Adviser in writing,  and  applicable  laws and  regulations.  Adviser  agrees to
provide, at its own expense, the office space, furnishings and equipment and the
personnel  required  by it to  perform  the  services  on the  terms and for the
compensation provided herein.

     3. SECURITIES TRANSACTIONS.  Adviser is authorized to select the brokers or
dealers  that  will  execute  purchases  and  sales  of  securities  for the GMO
Portfolio,  and is directed to use its best efforts to obtain the best available
price and most favorable  execution for such  transactions,  except as otherwise
permitted by the Board of Trustees of the Fund pursuant to written  policies and

<PAGE>

procedures  provided to the Adviser.  Adviser will promptly  communicate  to the
Fund's  officers and Board of Trustees  such  information  relating to portfolio
transactions as they may reasonably request.

     4.  COMPENSATION OF ADVISER.  For the services to be rendered by Adviser as
provided in this  Agreement,  the Fund will pay to Adviser at the end of each of
the Fund's fiscal quarters, a Basic Fee calculated by applying a quarterly rate,
based on the following  annual  percentage  rates, to the average  month-end net
assets of the GMO Portfolio for the quarter:

                 .275% on the first $500 million of net assets;
                 .225% on the next $500 million of net assets;
                 .200% on net assets in excess of $1 billion.

     Subject to the transition  rule described in Section 4.1 of this Agreement,
the Basic Fee, as provided  above,  will be increased or decreased by the amount
of  a  Performance  Fee  Adjustment  ("Adjustment").   The  Adjustment  will  be
calculated  as a percentage  of the average net assets of the GMO  Portfolio for
the 36-month period ending with the then-ended quarter,  and the Adjustment will
change  proportionately  with the  investment  performance  of the GMO Portfolio
relative to the  investment  performance  of the Russell  2000 Growth Index (the
"Index") for the same period. The Adjustment applies as follows:

CUMULATIVE 36-MONTH PERFORMANCE OF GMO |   ADJUSTMENT AS A PERCENTAGE OF AVERAGE
         PORTFOLIO VS. INDEX           |                  ASSETS*
         -------------------           |                  -------

Trails by any amount                       -0.15%
Equals-to-exceeds by up to 3%              Linear decrease from 0% to -0.15%
Exceeds by 3% to 6%                        Linear increase from 0% to +0.15%
Exceeds by more than 6%                    +0.15%
- ---------------------------
*For purposes of this calculation,  the adjustment is calculated by applying the
 quarterly  rate against  average net  assets of the GMO Portfolio over the same
 time period which the performance is measured.

     4.1. TRANSITION RULE FOR CALCULATING ADVISER'S COMPENSATION. The Adjustment
will not be fully operable until the close of the quarter ending April 30, 2003.
Until that time, the following transition rules will apply:

          (A) APRIL 3, 2000 THROUGH JANUARY 31, 2001. The Adviser's compensation
     will be the Basic Fee. No Adjustment will apply during this period.

          (B) FEBRUARY 1, 2001 THROUGH  APRIL 30,  2003.  Beginning  February 1,
     2001, the Adjustment  will take effect on a progressive  basis with regards
     to the number of months  elapsed  between May 1, 2000,  and the quarter for
     which  the  Adviser's  fee is  being  computed.  During  this  period,  the
     Adjustment  outlined in Section 4.0 will be multiplied  by a fraction.  The
     fraction will equal the number of months elapsed since May 1, 2000, divided
     by thirty-six.

                                       2

<PAGE>

          (C) ON AND AFTER MAY 1, 2003.  Commencing  May 1, 2003, the Adjustment
     will be fully operable.

     4.2. OTHER SPECIAL RULES RELATING TO ADVISER'S COMPENSATION.  The following
special rules will also apply to the Adviser's compensation:

          (A) GMO PORTFOLIO  PERFORMANCE.  The investment performance of the GMO
     Portfolio for any period,  expressed as a percentage of the "GMO  Portfolio
     unit value" at the  beginning of such period,  shall be the sum of: (i) the
     change in the GMO  Portfolio  unit value during such period;  (ii) the unit
     value  of the  Fund's  cash  distributions  from  the GMO  Portfolio's  net
     investment  income and realized  net capital  gains  (whether  long-term or
     short-term)  having an ex-dividend date occurring  within such period;  and
     (iii) the unit value of capital  gains  taxes paid or accrued  during  such
     period  by the Fund for  undistributed  realized  long-term  capital  gains
     realized from the GMO Portfolio.

          (B) "GMO PORTFOLIO UNIT  VALUE."The "GMO Portfolio unit value" will be
     determined by dividing the total net assets of the GMO Portfolio by a given
     number of units.  Initially,  the number of units in the GMO Portfolio will
     equal a nominal value as determined  by dividing  initial  assets by a unit
     value of $100.00 on April 3, 2000. Subsequently,  as assets are added to or
     withdrawn from the GMO Portfolio,  the number of units of the GMO Portfolio
     will be adjusted  based on the unit value of the GMO  Portfolio  on the day
     such changes are executed.  Any cash buffer  maintained by the Fund outside
     of the GMO  Portfolio  shall neither be included in the total net assets of
     the GMO Portfolio nor included in the computation of the GMO Portfolio Unit
     Value.

          (C)  INDEX  PERFORMANCE.  The  investment  record of the Index for any
     period,  expressed  as a percentage  of the Index at the  beginning of such
     period,  shall be the sum of:  (i) the  change  in the  level of the  Index
     during such  period,  and (ii) the value,  computed  consistently  with the
     Index of cash  distributions  having an ex-dividend  date occurring  within
     such period made by companies whose securities comprise the Index. For this
     purpose,  cash  distributions  on the  securities  which comprise the Index
     shall be treated as  reinvested  in the Index at least as frequently as the
     end of each calendar quarter following the payment of the dividend.

          (D)  PERFORMANCE  COMPUTATIONS.  The  foregoing  notwithstanding,  any
     computation  of the  investment  performance  of the GMO  Portfolio and the
     investment  record  of the  Index  shall  be in  accordance  with  any then
     applicable rules of the U.S. Securities and Exchange Commission.

          (E)  EFFECT  OF  TERMINATION.  In the  event  of  termination  of this
     Agreement, the fees provided in Sections 4 and 4.1 shall be computed on the
     basis of the period ending on the last business day on which this Agreement
     is in effect,  subject to a pro rata adjustment based on the number of days
     elapsed in the current  fiscal  quarter as a percentage of the total number
     of days in such quarter.

                                       3

<PAGE>

     5.  REPORTS.  The Fund and Adviser  agree to furnish to each other  current
prospectuses,  proxy  statements,  reports to shareholders,  certified copies of
their  financial  statements,  and such other  information  with regard to their
affairs as each may reasonably request.

     6.  COMPLIANCE.  Adviser agrees to comply with all policies,  procedures or
reporting  requirements that the Board of Trustees of the Fund reasonably adopts
and communicates to Adviser in writing, including any such policies,  procedures
or  reporting  requirements  relating  to  soft  dollar  or  directed  brokerage
arrangements.

     7.  STATUS OF  ADVISER.  The  services of Adviser to the Fund are not to be
deemed exclusive,  and Adviser will be free to render similar services to others
so long as its  services to the Fund are not impaired  thereby.  Adviser will be
deemed to be an independent  contractor  and will,  unless  otherwise  expressly
provided or  authorized,  have no authority to act for or represent  the Fund or
the Fund in any way or otherwise be deemed an agent of the Fund or the Fund.

     8.  LIABILITY OF ADVISER.  No provision of this Agreement will be deemed to
protect   Adviser  against  any  liability  to  the  Fund,  the  Fund  or  their
shareholders  to which it might  otherwise  be subject by reason of any  willful
misfeasance,  bad faith or gross  negligence in the performance of its duties or
the reckless disregard of its obligations under this Agreement.

     9. DURATION AND TERMINATION.  This Agreement will become effective on April
3, 2000, and will continue in effect until April 2, 2002, and  thereafter,  only
so long as such continuance is approved at least annually by votes of the Fund's
Board of Trustees who are not parties to such Agreement or interested persons of
any such party,  cast in person at a meeting called for the purpose of voting on
such approval. In addition,  the question of continuance of the Agreement may be
presented to the shareholders of the Fund; in such event,  such continuance will
be  effected  only if  approved  by the  affirmative  vote of a majority  of the
outstanding voting securities of the Fund.

     Provided,  however,  that (i) this  Agreement may at any time be terminated
without  payment of any  penalty  either by vote of the Board of Trustees of the
Fund or by vote of a majority of the outstanding  voting securities of the Fund,
on sixty days' written notice to Adviser, (ii) this Agreement will automatically
terminate  in the event of its  assignment,  and  (iii)  this  Agreement  may be
terminated  by Adviser on ninety days'  written  notice to the Fund.  Any notice
under this  Agreement  will be given in writing,  addressed  and  delivered,  or
mailed postpaid, to the other party at any office of such party.

     As used in this Section 9, the terms "assignment,"  "interested persons," a
"vote  of a  majority  of the  outstanding  voting  securities"  will  have  the
respective  meanings set forth in Section 2(a)(4),  Section 2(a)(19) and Section
2(a)(42) of the Investment Fund Act of 1940.

     10.  SEVERABILITY.  If any provision of this Agreement will be held or made
invalid by a court decision,  statute, rule or otherwise,  the remainder of this
Agreement will not be affected thereby.

                                       4
<PAGE>

     11. PROXY POLICY. With regard to the solicitation of shareholder votes, the
Fund will vote the shares of all securities held by the Fund.

     IN WITNESS  WHEREOF,  the parties  hereto have caused this  Agreement to be
executed this ___ day of _______, 2000.

ATTEST:                             VANGUARD EXPLORER FUND

By ________________________         By _________________________________
                                          Chairman, CEO and President

ATTEST:                             GRANTHAM, MAYO, VAN OTTERLOO & CO.

By _________________________        By __________________________________





                            THE VANGUARD GROUP, INC.
                            ------------------------

                                 CODE OF ETHICS
                                 --------------

SECTION 1:  BACKGROUND

This Code of Ethics has been  approved  and adopted by the Board of Directors of
The Vanguard Group, Inc.  ("Vanguard") and the Boards of Trustees of each of the
Vanguard funds in compliance with Rule 17j-1 under the Investment Company Act of
1940. The Code has been amended and restated effective as of May 1, 1999. Except
as otherwise provided,  the Code applies to all "Vanguard personnel," which term
includes all  employees,  officers,  Directors  and Trustees of Vanguard and the
Vanguard funds. The Code also contains  provisions which apply to the investment
advisers to the Vanguard funds (see section 11).

SECTION 2:  STATEMENT OF GENERAL FIDUCIARY STANDARDS

This Code of Ethics is based on the overriding principle that Vanguard personnel
act  as  fiduciaries  for  shareholders'  investments  in  the  Vanguard  funds.
Accordingly,  Vanguard  personnel must conduct their  activities at all times in
accordance with the following standards:

     a)   SHAREHOLDERS' INTERESTS COME FIRST. In the course of fulfilling  their
duties and  responsibilities  to Vanguard fund shareholders,  Vanguard personnel
must at all times place the interests of Vanguard fund  shareholders  first.  In
particular,  Vanguard  personnel must avoid serving their own personal interests
ahead of the interests of Vanguard fund shareholders.

     b)   CONFLICTS OF INTEREST  MUST BE AVOIDED. Vanguard  personnel must avoid
any situation  involving an actual or potential conflict of interest or possible
impropriety with respect to their duties and  responsibilities  to Vanguard fund
shareholders.

     c)   COMPROMISING  SITUATIONS MUST BE AVOIDED. Vanguard  personnel must not
take  advantage  of their  position  of trust and  responsibility  at  Vanguard.
Vanguard  personnel must avoid any situation that might  compromise or call into
question  their exercise of full  independent  judgment in the best interests of
Vanguard fund shareholders.

<PAGE>

All  activities  of Vanguard  personnel  should be guided by and adhere to these
fiduciary  standards.  The remainder of this Code sets forth  specific rules and
procedures  which are consistent with these fiduciary  standards.  However,  all
activities by Vanguard  personnel  are required to conform with these  fiduciary
standards  regardless  of whether the activity is  specifically  covered in this
Code.

SECTION 3:  DUTY OF CONFIDENTIALITY

Vanguard personnel must keep confidential at all times any nonpublic information
they may obtain in the course of their employment at Vanguard.  This information
includes but is not limited to:

     1)   information  on the  vanguard  funds,  including  recent or  impending
          securities    transactions   by   the   funds,   activities   of   the
          funds'advisers, offerings of new funds, and closings of funds;

     2)   information   on   Vanguard   fund    shareholders   and   prospective
          shareholders,  including their  identities,  investments,  and account
          transactions;

     3)   information  on  other  vanguard   personnel,   including  their  pay,
          benefits, position level, and performance ratings; and

     4)   information on Vanguard business  activities,  including new services,
          products, technologies, and business initiatives.

Vanguard  personnel  have  the  highest  fiduciary   obligation  not  to  reveal
confidential  Vanguard  information  to any party that does not have a clear and
compelling need to know such information.

SECTION 4:  GIFT POLICY

Vanguard  personnel are prohibited  from seeking or accepting  gifts of material
value from any person or entity,  including  any Vanguard  fund  shareholder  or
Vanguard client,  when such gift is in relation to doing business with Vanguard.
In certain  cases,  Vanguard  PERSONNEL MAY ACCEPT GIFTS OF DE MINIMIS value (as
determined in accordance with guidelines set forth in Vanguard's Human Resources
Policy Manual) but only if they obtain the approval of a Vanguard officer.

<PAGE>

SECTION 5:  OUTSIDE ACTIVITIES

     a)   PROHIBITIONS   ON   SECONDARY   EMPLOYMENT.    Vanguard employees  are
prohibited from working for any business or enterprise in the financial services
industry  that  competes  with  Vanguard.  In addition,  Vanguard  employees are
prohibited from working for any  organization  that could possibly  benefit from
the  employee's  knowledge of  confidential  Vanguard  information,  such as new
Vanguard  services  and  technologies.   Beyond  these  prohibitions,   Vanguard
employees may accept secondary employment, but only with prior approval from the
Vanguard Compliance Department.  Vanguard officers are prohibited from accepting
or  serving  in any form of  secondary  employment  unless  they  have  received
approval from a Vanguard  Managing  Director or the Vanguard  Chairman and Chief
Executive Officer.

     b)   PROHIBITION  ON  SERVICE  AS  DIRECTOR  OR PUBLIC  OFFICIAL.  Vanguard
officers and employees are prohibited  from serving on the board of directors of
any publicly traded company or in an official  capacity for any federal,  state,
or local government (or governmental  agency or  instrumentality)  without prior
approval from the Vanguard Compliance Department.

     c)   PROHIBITION ON MISUSE OF VANGUARD TIME OR PROPERTY. Vanguard personnel
are  prohibited  from using  Vanguard time,  equipment,  services,  personnel or
property  for any  purposes  other  than the  performance  of their  duties  and
responsibilities at Vanguard.

SECTION 6:  GENERAL PROHIBITIONS ON TRADING

     a)   TRADING  ON  KNOWLEDGE  OF  VANGUARD  FUNDS  ACTIVITIES. All  Vanguard
personnel are prohibited  from taking  personal  advantage of their knowledge of
recent or impending  securities  activities of the Vanguard  funds or the funds'
investment  advisers.  In particular,  Vanguard  personnel are  prohibited  from
purchasing  or selling,  directly or  indirectly,  any  security  when they have
actual knowledge that the security is being purchased or sold, or considered for
purchase or sale, by a Vanguard fund. This prohibition applies to all securities
in which the person has acquired or will  acquire  "beneficial  ownership."  For
these  purposes,  a person is  considered  to have  beneficial  ownership in all
securities  over  which  the  person  enjoys  economic  benefits   substantially
equivalent to ownership (for example,  securities held in trust for the person's
benefit),  regardless of who is the registered owner. Under this Code of Ethics,
Vanguard personnel are considered to have beneficial ownership of all securities
owned by their spouse or minor children.

<PAGE>

     b)   VANGUARD INSIDER TRADING POLICY.  All Vanguard  personnel are  subject
to Vanguard's  Insider Trading  Policy,  which is considered an integral part of
this Code of  Ethics.  Vanguard's  Insider  Trading  Policy  prohibits  Vanguard
personnel  from  buying or  selling  any  security  while in the  possession  of
material nonpublic information about the issuer of the security. The policy also
prohibits  Vanguard  personnel from  communicating to third parties any material
nonpublic information about any security or issuer of securities.  Any violation
of Vanguard's Insider Trading Policy may result in penalties which could include
termination of employment with Vanguard.

SECTION 7:  ADDITIONAL TRADING RESTRICTIONS FOR ACCESS PERSONS

     a)   APPLICATION. The  restrictions of this section 7 apply to all Vanguard
access persons. For purposes of the Code of Ethics, "access persons" include:

     1)   any  Director  or Trustee of Vanguard  or a Vanguard  fund,  excluding
          disinterested  Directors and Trustees  (i.e.,  any Director or Trustee
          who is not an  "interested  person"  of a  Vanguard  fund  within  the
          meaning of Section 2(a)(19) of the Investment Company Act of 1940);

     2)   any officer of Vanguard or a Vanguard fund; and

     3)   any  employee of Vanguard or a Vanguard  fund who in the course of his
          or her regular  duties  participates  in the  selection  of a Vanguard
          fund's  securities or who works in a Vanguard  department or unit that
          has  access to  information  regarding  a  Vanguard  fund's  impending
          purchases or sales of securities.

The  Vanguard  Compliance  Department  will notify all  Vanguard  personnel  who
qualify as access persons of their duties and  responsibilities  under this Code
of Ethics. The restrictions of this section 7 apply to all transactions in which
a Vanguard access person has or will acquire  beneficial  ownership (see section
6a) of a security,  including  transactions by a spouse or minor child. However,
the restrictions do not apply to transactions involving:  (i) direct obligations
of the  Government  of the United  States;  (ii) high  quality  short-term  debt
instruments,  including  bankers'  acceptances,  bank  certificates  of deposit,
commercial  paper,  and  repurchase  agreements;  and (iii) shares of registered
open-end  investment  companies  (including  shares of

<PAGE>

any Vanguard fund). In addition,  the  restrictions do not apply to transactions
in accounts  over which the access  person has no direct or indirect  control or
influence.

     b)   GENERAL  RESTRICTIONS FOR ACCESS PERSONS.  Vanguard access persons are
subject  to  the  following   restrictions  with  respect  to  their  securities
transactions:

     1)   PRE-CLEARANCE OF SECURITIES TRANSACTIONS. Vanguard access persons must
          receive  approval  from  the  Vanguard  Compliance  Department  before
          purchasing  or  selling  any  securities.   The  Vanguard   Compliance
          Department  will  notify  Vanguard  access  persons if their  proposed
          securities transactions are permitted under this Code of Ethics.

     2)   TRADING THROUGH VANGUARD BROKERAGE  SERVICES.  Vanguard access persons
          must  conduct  all  their  securities  transactions  through  Vanguard
          Brokerage   Services.   Vanguard   Brokerage   Services  will  send  a
          confirmation  notice  of any  purchase  or  sale  of  securities  by a
          Vanguard access person to the Vanguard Compliance Department.

     3)   PROHIBITION ON INITIAL PUBLIC  OFFERINGS.  Vanguard access persons are
          prohibited from acquiring securities in an initial public offering.

     4)   PROHIBITION  ON  PRIVATE  PLACEMENTS.   Vanguard  access  persons  are
          prohibited from acquiring  securities in a private  placement  without
          prior approval from the Vanguard Compliance  Department.  In the event
          an access person receives approval to purchase securities in a private
          placement,  the access person must  disclose that  investment if he or
          she plays any part in a  Vanguard  fund's  later  consideration  of an
          investment in the issuer.

     5)   PROHIBITION ON OPTIONS.  Vanguard  access persons are prohibited  from
          acquiring or selling any option on any security.

     6)   PROHIBITION ON  SHORT-SELLING.  Vanguard access persons are prohibited
          from  selling  any  security  that the access  person  does not own or
          otherwise engaging in "short-selling" activities.

     7)   PROHIBITION ON SHORT-TERM TRADING PROFITS. Vanguard access persons are
          prohibited  from  profiting  in the  purchase  and  sale,  or sale and
          purchase, of the same (or related) securities within 60 calendar days.
          In the event that an access person realizes profits on

<PAGE>

          such short-term trades, the access person must relinquish such profits
          to The Vanguard Group Foundation.

     c)   BLACKOUT RESTRICTIONS FOR ACCESS PERSONS.  All Vanguard access persons
are subject to the  following  restrictions  when their  purchases  and sales of
securities coincide with trades by the Vanguard funds:

     1)   PURCHASES AND SALES WITHIN THREE DAYS FOLLOWING A FUND TRADE. Vanguard
          access persons are prohibited  from purchasing or selling any security
          within  three  calendar  days after a Vanguard  fund has traded in the
          same (or a related) security. In the event that an access person makes
          a prohibited  purchase or sale within the three-day period, the access
          person must unwind the  transaction  and  relinquish any gain from the
          transaction to The Vanguard Group Foundation.

     2)   PURCHASES WITHIN SEVEN DAYS BEFORE A FUND PURCHASE.  A Vanguard access
          person who  purchases a security  within seven  calendar days before a
          Vanguard fund purchases the same (or a related) security is prohibited
          from  selling the security  for a period of six months  following  the
          fund's  trade.  In the event that an access  person makes a prohibited
          sale within the six-month period, the access person must relinquish to
          The Vanguard Group Foundation any gain from the transaction.

     3)   SALES WITHIN SEVEN DAYS BEFORE A FUND SALE. A Vanguard  access  person
          who sells a security  within  seven days before a Vanguard  fund sells
          the same (or a related) security must relinquish to The Vanguard Group
          Foundation the difference  between the access  person's sale price and
          the Vanguard  fund's sale price  (assuming  the access  person's  sale
          price is higher).

     4)   RESTRICTIONS  NOT  APPLICABLE TO TRADES BY VANGUARD  INDEX FUNDS.  The
          restrictions of this section 7c do not apply to purchases and sales of
          securities by Vanguard  access persons which would  otherwise  violate
          section 7c solely because the transactions coincide with trades by any
          Vanguard index funds.

SECTION 8:  ADDITIONAL TRADING RESTRICTIONS FOR INSTITUTIONAL CLIENT CONTACTS

<PAGE>

     a)   APPLICATION.  The restrictions of this section 8 apply to all Vanguard
Institutional  client  contacts.   For  purposes  of  the  Code  of  Ethics,  an
"Institutional  client  contact"  includes any Vanguard  employee who works in a
department or unit at Vanguard that has  significant  levels of  interaction  or
dealings with the  management of clients of  Vanguard's  Institutional  Investor
Group.  The Vanguard  Compliance  Department will notify Vanguard  employees who
qualify as Institutional client contacts of the restrictions of this Section 8.

     b)   PROHIBITION ON TRADING  SECURITIES OF  INSTITUTIONAL CLIENTS. Vanguard
Institutional client contacts are prohibited from acquiring securities issued by
clients of the Vanguard  Institutional  Investor Group (including any options or
futures  contracts based on such  securities).  In the event that any individual
who  becomes  subject to this  prohibition  already  owns  securities  issued by
Institutional clients, the individual will be prohibited from disposing of those
securities without prior approval from the Vanguard Compliance  Department.  The
restrictions of this section 8 apply to all transactions in which  Institutional
client contacts have acquired or would acquire beneficial ownership (see section
6a) of a security,  including  transactions by a spouse or minor child. However,
the  restrictions  do not apply to  transactions  in any  account  over which an
individual  does not possess any direct or indirect  control or  influence.  The
Vanguard Compliance Department will maintain a list of the Institutional clients
to which the  prohibitions  of this  section 8 apply.  The  Vanguard  Compliance
Department may waive the  prohibition on acquiring  securities of  Institutional
clients  in  appropriate  cases  (including,  for  example,  cases  in  which an
individual  acquires  securities  as  part  of  an  inheritance  or  through  an
employer-sponsored employee benefits or compensation program).

SECTION 9:  COMPLIANCE PROCEDURES

     a)   APPLICATION. The  requirements of this section 9 apply to all Vanguard
personnel other than disinterested  Directors and Trustees (see section 7a). The
requirements apply to all transactions in which Vanguard personnel have acquired
or would acquire beneficial ownership (see section 6a) of a security,  including
transactions by a spouse or minor child.  However, the requirements do not apply
to  transactions  involving:  (i) direct  obligations  of the  Government of the
United States; (ii) high quality short-term debt instruments, including bankers'
acceptances,  bank  certificates of deposit,  commercial  paper,  and repurchase
agreements;  and  (iii)  shares  of  registered  open-end  investment  companies
(including  shares of any Vanguard fund). In addition,  the  requirements do not
apply to securities acquired for accounts over which the person has no direct or
indirect control or influence.

<PAGE>

     b)   DISCLOSURE OF PERSONAL HOLDINGS. All Vanguard  personnel must disclose
their personal securities  holdings to the Vanguard  Compliance  Department upon
commencement of employment with Vanguard.  These  disclosures  must identify the
title,  number of shares,  and  principal  amount with respect to each  security
holding.

     c)   RECORDS OF SECURITIES TRANSACTIONS. All Vanguard personnel must notify
the  Vanguard  Compliance  Department  if they  have  opened or intend to open a
brokerage  account.  Vanguard  personnel must direct their brokers to supply the
Vanguard Compliance Department with duplicate  confirmation  statements of their
securities  transactions  and  copies  of  all  periodic  statements  for  their
brokerage accounts.

     d)   CERTIFICATION  OF  COMPLIANCE.  All  Vanguard  personnel  must certify
annually to the  Vanguard  Compliance  Department  that:  (i) they have read and
understand this Code of Ethics; (ii) they have complied with all requirements of
the Code of Ethics;  and (3) they have reported all transactions  required to be
reported under the Code of Ethics.

SECTION 10:  REQUIRED REPORTS BY DISINTERESTED DIRECTORS AND TRUSTEES

Disinterested  Directors  and  Trustees  (see section 7a) are required to report
their  securities  transactions  to the Vanguard  Compliance  Department only in
cases where the  Director or Trustee knew or should have known during the 15-day
period  immediately  preceding or following the date of the transaction that the
security had been  purchased or sold,  or was being  considered  for purchase or
sale, by a Vanguard fund.

SECTION 11: APPLICATION TO INVESTMENT ADVISERS

     a)   ADOPTION OF CODE OF ETHICS. Each investment adviser to a Vanguard fund
must  adopt a code of  ethics in  compliance  with Rule  17j-1 and  provide  the
Vanguard  Compliance  Department  with a copy  of the  code  of  ethics  and any
subsequent amendments.  Each investment adviser is responsible for enforcing its
code of ethics and reporting to the Vanguard  Compliance  Department on a timely
basis any violations of the code of ethics and resulting sanctions.

<PAGE>

     b)   PREPARATION OF ANNUAL  REPORTS.  Each investment adviser to a Vanguard
fund must prepare an annual report on its code of ethics for review by the Board
of Trustees of the Vanguard fund. This report must contain the following:

     1)   a description of any issues arising under the adviser's code of ethics
          including, but not limited to, information about any violations of the
          code,  sanctions imposed in response to such violations,  changes made
          to the code's provisions or procedures, and any recommended changes to
          the code; and

     2)   a  certification   that  the  investment   adviser  has  adopted  such
          procedures as are reasonably  necessary to prevent access persons from
          violating the code of ethics.

SECTION 12:  REVIEW BY BOARDS OF DIRECTORS AND TRUSTEES

     a)   REVIEW OF INVESTMENT ADVISERS'  CODE OF ETHICS. Prior to retaining the
services of any investment adviser for a Vanguard fund, the Board of Trustees of
the  Vanguard  fund must  review the code of ethics  adopted  by the  investment
adviser  pursuant to Rule 17j-1 under the  Investment  Company Act of 1940.  The
Board of Trustees must receive a certification  from the investment adviser that
the adviser has adopted such  procedures as are reasonably  necessary to prevent
access persons from  violating the adviser's  code of ethics.  A majority of the
Trustees  of the  Vanguard  fund,  including  a  majority  of the  disinterested
Trustees  of the Fund,  must  determine  whether  the  adviser's  code of ethics
contains such  provisions as are reasonably  necessary to prevent access persons
from  engaging  in any act,  practice,  or course of conduct  prohibited  by the
anti-fraud provisions of Rule 17j-1.

     b)   REVIEW OF VANGUARD ANNUAL REPORTS. The Vanguard Compliance  Department
must prepare an annual  report on this Code of Ethics for review by the Board of
Directors  of Vanguard  and the Boards of Trustees of the  Vanguard  funds.  The
report must contain the following:

     1)   a  description  of issues  arising  under the Code of Ethics since the
          last  report  including,  but not limited  to,  information  about any
          violations  of  the  Code,  sanctions  imposed  in  response  to  such
          violations,  changes made to the Code's provisions or procedures,  and
          any recommended changes to the Code; and

<PAGE>

     2)   a certification that Vanguard and the Vanguard Funds have adopted such
          procedures as are reasonably  necessary to prevent access persons from
          violating the Code of Ethics.

SECTION 13:  SANCTIONS

In the event of any violation of this Code of Ethics, Vanguard senior management
will  impose  such  sanctions  as deemed  necessary  and  appropriate  under the
circumstances  and in the best interests of Vanguard fund  shareholders.  In the
case of any  violations  by Vanguard  employees,  the range of  sanctions  could
include a letter of censure,  suspension of employment without pay, or permanent
termination of employment.

SECTION 14:  RETENTION OF RECORDS

Vanguard must maintain all records required by Rule 17j-1 including:  (i) copies
of this Code of Ethics and the codes of ethics of all investment advisers to the
Vanguard  funds;  (ii)  records  of any  violations  of the codes of ethics  and
actions taken as a result of the violations;  (iii) copies of all certifications
made by Vanguard  personnel  pursuant to section 9d; (iv) lists of all  Vanguard
personnel  who are,  or within the past five years  have  been,  access  persons
subject  to the  trading  restrictions  of  section 8 and lists of the  Vanguard
compliance  personnel  responsible for monitoring  compliance with those trading
restrictions;  and (v) copies of the annual  reports to the Boards of  Directors
and Trustees pursuant to section 12.

<PAGE>


                                 CODE OF ETHICS

                                    GMO TRUST
                     GRANTHAM, MAYO, VAN OTTERLOO & CO. LLC
                             DANCING ELEPHANT, LTD.
                               GMO AUSTRALIA LTD.
                                GMO AUSTRALIA LLC
                           GMO RENEWABLE RESOURCES LLC
                                GMO WOOLLEY LTD.

                             Dated February 17, 2000

                                 I. INTRODUCTION

     A.   FIDUCIARY DUTY.  This Code of Ethics  is based on the  principle  that
trustees,  officers,  employees,  and  certain  other  related  persons  of  the
above-listed  mutual funds and fund managers have a fiduciary  duty to place the
interests of the Funds and ACCOUNTS  AHEAD OF THEIR OWN. THE CODE APPLIES TO ALL
ACCESS PERSONS(1) and focuses  principally  on  pre-clearance  and  reporting of
personal  transactions  in  securities.  Access  Persons must avoid  activities,
interests and  relationships  that might interfere with making  decisions in the
best interests of any of the GMO Funds and Accounts.

     As fiduciaries, Access Persons must at all times:

          1.   PLACE THE INTERESTS OF THE GMO FUNDS AND ACCOUNTS  FIRST.  Access
     Persons must scrupulously  avoid serving their own personal interests ahead
     of the interests of the GMO Funds and Accounts in any decision  relating to
     their personal investments. An Access Person may not induce or cause a Fund
     to take action, or not to take action,  for personal  benefit,  rather than
     for the benefit of the Fund. Nor may any Access Persons  otherwise  exploit
     the client relationship for personal gain.

          2.   CONDUCT ALL PERSONAL SECURITIES TRANSACTIONS CONSISTENT WITH THIS
     CODE INCLUDING BOTH THE PRE-CLEARANCE AND REPORTING REQUIREMENTS.  Doubtful
     situations  should be  resolved  in favor of the GMO  Funds  and  Accounts.
     Technical  compliance  with the Code's  procedures  will not  automatically
     insulate  from  scrutiny  any trades that  indicate  an abuse of  fiduciary
     duties.

          3.   AVOID TAKING INAPPROPRIATE ADVANTAGE OF THEIR  POSITIONS.  Access
     Persons must not only seek to achieve  technical  compliance  with the Code
     but should  strive to abide by its spirit  and the  principles  articulated
     herein.


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(1)  Capitalized words are defined in Appendix 1.

<PAGE>

     B.   APPENDICES TO THE CODE. The appendices  to  this Code are  attached to
and are a part of the Code. The appendices include the following:

          1.   DEFINITIONS  (capitalized  terms  in  the  Code  are  defined  in
     Appendix 1),

          2.   MASTER  PERSONAL  TRADING   POLICIES   AND   PROCEDURES  and  the
     appendices thereto (Appendix 2),

          3.   QUICK  REFERENCE  GUIDE TO  PRE-CLEARANCE AND QUARTERLY REPORTING
     (Appendix A to Appendix 2),

          4.   QUARTERLY TRANSACTION REPORT (Appendix B to Appendix 2),

          5.   CONTACT   PERSONS  including   the  Compliance  Officer  and  the
     Conflicts of Interest Committee, if different than as initially  designated
     herein (Appendix C to Appendix 2),

          6.   Personal  Trading  Relationship  and  Holdings   Disclosure  Form
     (Appendix D to Appendix 2),

          7.   TRADE AUTHORIZATION REQUEST  FOR ACCESS  PERSONS  (Appendix  E to
     Appendix 2),

          8.   ACKNOWLEDGMENT   OF  RECEIPT  OF CODE  OF ETHICS (Appendix  F  to
     Appendix 2),

          9.   ANNUAL CERTIFICATION  OF  COMPLIANCE  WITH  THE  CODE  OF  ETHICS
     (Appendix G to Appendix 2), and

          10.  FORM LETTER TO BROKER, DEALER OR BANK (Appendix H to Appendix 2).

                      II. PERSONAL SECURITIES TRANSACTIONS

     A. PRE-CLEARANCE REQUIREMENTS FOR ACCESS PERSONS.

          1.   GENERAL  REQUIREMENT.   All  Securities  Transactions  by  Access
     Persons  (other  than  any trustee  of GMO  Trust who is not an "interested
     person" (as defined in the  Investment Company Act of 1940 ("1940 Act")) of
     a GMO Fund)  of  the  types  set  forth in  Section 2 of the Procedures are
     subject to  the  pre-clearance  procedures  set  forth  in Section 6 of the
     Procedures.

          2.   GENERAL  POLICY. In  general, requests  to buy or sell a security
     will be denied if the Security  is being  considered  for  purchase or sale
     within 15 days of the date of the request by any  Fund or Account. Requests
     to sell a  Security  short  will be

                                       2

<PAGE>

     denied for the same  reasons  and also if the  security is owned by any GMO
     Active Portfolio.

          3.   PROCEDURES.  The procedures  for  requesting  pre-clearance  of a
     Securities  Transaction are set forth in Section 6 of the Procedures and in
     Appendix  A thereto.  The  Compliance  Officer  (or a  designee)  will keep
     appropriate records of all pre-clearance requests.

          4.   NO   EXPLANATION   REQUIRED FOR  REFUSALS.  In  some  cases,  the
     Compliance Officer (or a designee)  may  refuse to authorize  a  Securities
     Transaction for a reason that is confidential.  The  Compliance  Officer is
     not required to  give  an   explanation   for  refusing  to  authorize  any
     Securities Transaction.

     B.   PROHIBITED TRANSACTIONS.

          1.   PROHIBITED SECURITIES  TRANSACTIONS.   The  following  Securities
     Transactions  are  prohibited  and will not be  authorized,  except  to the
     extent designated below.  These prohibitions shall not apply to any trustee
     of GMO Trust who is not an "interested person" (as defined in the 1940 Act)
     of a GMO Fund.

               a. INITIAL  PUBLIC  OFFERINGS.  Any purchase of  Securities in an
          initial  public  offering  other than a new  offering of a  registered
          open-end  investment  company or any initial  offering which an Access
          Person can demonstrate in the  pre-clearance  process is available and
          accessible to the general  investing  public through  on-line or other
          means.

               b. PRIVATE PLACEMENTS.  Any purchase of Securities in an offering
          exempt from registration under the Securities Act of 1933, as amended,
          is  generally  prohibited  but may be  reviewed  by the  Conflicts  of
          Interest Committee upon request.

               c. OPTIONS ON SECURITIES.  Options on any securities  owned by an
          active  trading  area of the  firm or an area  in  which  an  employee
          directly works.

               d. SECURITIES BEING CONSIDERED FOR PURCHASE OR SALE. Any Security
          being  considered  for  purchase or sale by a Fund or an Account.  For
          this purpose, a security is being considered for purchase or sale when
          a   recommendation   to  purchase  or  sell  the   Security  has  been
          communicated or, with respect to the person making the recommendation,
          when such person seriously considers making the recommendation.

               e.  SHORT-TERM  TRADING.  Any  purchase  or sale  of the  same or
          equivalent  Securities within 60 calendar days generally is prohibited
          but will be  reviewed  by the  Compliance  Officer  on a  case-by-case
          basis,  and  may be  approved  in  situations  in  which  there  is no
          potential  for abuse and the equities  strongly  support an

                                       3

<PAGE>

          exemption.  Securities exempt from pre-clearance and reporting are not
          subject to this prohibition.

               f. SHORT SELLING OF SECURITIES. Short selling securities that are
          held in Active Portfolios (including  International  Active,  Domestic
          Active,  Emerging Markets and Global Properties).  Access Persons also
          are prohibited from short selling Securities held in an account within
          his or her own area, even if  quantitatively  managed.  The Compliance
          Department will determine whether an Active Portfolio holds a Security
          and whether a Security is held by an Access Person's "area."

          2.   IMPROPER  SECURITIES  TRANSACTIONS.   The  following   Securities
     Transactions  may  violate the  federal  securities  laws or other legal or
     regulatory  provisions  or are  otherwise  deemed  to be  improper  and are
     prohibited and will not be authorized under any circumstances:

               a. INSIDE  INFORMATION.  Any  transaction  in a Security while in
          possession of material nonpublic information regarding the Security or
          the issuer of the Security;

               b. MARKET MANIPULATION. Transactions intended to raise, lower, or
          maintain the price of any Security or to create a false  appearance of
          active trading;

               c. OTHERS.  Any  other  transactions  deemed  by  the  Compliance
          Officer (or a designee)  to involve a conflict of  interest,  possible
          diversions   of  corporate   opportunities,   or  an   appearance   of
          impropriety.

     C.   EXEMPTIONS.

          1.   The following Securities Transactions and other  transactions are
     exempt (as indicated below) from either the pre-clearance  requirements set
     forth in Section II.A. or the reporting  requirements  set forth in Section
     II.D, or both. Note that de minimus purchases and sales of large market cap
     stocks (see (i) below), are exempt from  pre-clearance,  but are subject to
     quarterly reporting. (Also, see Appendix 2.):

               a. Securities  Transactions  Exempt from Both  Pre-clearance  and
          Reporting.

               -    MUTUAL FUNDS.  Securities issued by any registered  open-end
                    investment companies (including, but not limited to, the GMO
                    Funds).

               -    U.S.  GOVERNMENT   SECURITIES.   Securities  issued  by  the
                    Government of the United States;

                                       4

<PAGE>

               -    MONEY MARKET INSTRUMENTS.  Money market instruments or their
                    equivalents,    including   bankers'    acceptances,    bank
                    certificates OF DEPOSIT,  COMMERCIAL  PAPER AND HIGH QUALITY
                    SHORT-TERM   DEBT   INSTRUMENTS2,    including    repurchase
                    agreements;

               -    CURRENCIES  AND FORWARD  CONTRACTS  THEREON.  Currencies  of
                    foreign governments and forward contracts thereon;

               -    CERTAIN  CORPORATE  ACTIONS.  Any  acquisition of Securities
                    through  stock  dividends,  dividend  reinvestments,   stock
                    splits,  reverse  stock  splits,  mergers,   consolidations,
                    spin-offs,  or other similar  corporate  reorganizations  or
                    distributions  generally  applicable  to all  holders of the
                    same class of Securities and

               -    RIGHTS.  Any acquisition of Securities  through the exercise
                    of rights  issued by an issuer to all  holders of a class of
                    its  Securities,  to the extent the rights were  acquired in
                    the issue.

               b. Securities  Transactions Exempt from Pre-clearance but Subject
          to Reporting Requirements.

               -    DISCRETIONARY    ACCOUNTS.    Transactions    through    any
                    discretionary  accounts  (i) that have been  approved by the
                    Compliance  Department  in  advance  and (ii) for  which the
                    Access Person has arranged for quarterly  certification from
                    the third party manager stating that the individual  (Access
                    Person or Immediate  Family  Member) has not  influenced the
                    discretionary  manager's  decisions  during  the  period  in
                    question;

               -    DE  MINIMUS   PURCHASES  AND  SALES  OF  LARGE  CAP  STOCKS.
                    Purchases  or sales of less than  $5,000 of common  stock of
                    issuers  whose  market  capitalization  is  greater  than $5
                    billion,  which may be utilized  once per security  during a
                    pre-clearance period; and

               -    MISCELLANEOUS. Any transaction in the following: (1) limited
                    partnerships  and other pooled  vehicles  sponsored by a GMO
                    Entity, (2) open-end  investment  vehicles not market traded
                    and  (3)  other  Securities  as may  from  time  to  time be
                    designated in writing by the Conflicts of Interest Committee
                    on  the  ground  that  the  risk  of  abuse  is  minimal  or
                    non-existent.

          2.   APPLICATION TO COMMODITIES, FUTURES AND OPTIONS.

- --------------------
(2)  High quality short-term  debt  instrument  means any instrument  that has a
maturity  at  issuance of less than 366 days and that is rated in one of the two
highest  rating  categories  by  a  Nationally  Recognized   Statistical  Rating
Organization.

                                       5

<PAGE>

               a.   The purchase or sale of  commodities, futures on commodities
          and  related  options,  futures  on  currencies,   non-exchange-traded
          options on  currencies,  and  non-exchange-traded  options on currency
          futures are not subject to the pre-clearance requirements set forth in
          Section II.A. or the reporting requirements set forth in Section II.D.

               b.   The  purchase  and  sale  of   exchange-traded   options  on
          currencies,  exchange-traded  options  on  currency  futures;  and the
          purchase of futures on securities  comprising  part of a  broad-based,
          publicly  traded market based index of stocks and related  options are
          not  subject to the  pre-clearance  requirements  set forth in Section
          II.A.,  but are  subject to the  reporting  requirements  set forth in
          Section II.D.

               c.   The purchase of other  options  relating to  Securities  are
          subject to all of the provisions of this Code.

               d.   The exercise of  options,  the  purchase or sale of which is
          subject to the pre-clearance or reporting  provisions of this Code, is
          not  subject to the  pre-clearance  requirements  set forth in Section
          II.A.,  but is  subject  to the  reporting  requirements  set forth in
          Section II.D.

               e.   The  writing of  covered  call  options  on   Securities  or
          Securities indices is permitted.

     D.   REPORTING REQUIREMENTS

          1.   INITIAL AND ANNUAL DISCLOSURE OF PERSONAL HOLDINGS. No later than
     10 days after initial  designation as an Access Person and thereafter on an
     annual basis (and based on  information  current as of a date not more than
     30 days before the report is submitted),  each Access Person must report to
     the Compliance  Department all of the information set forth in Section 1 of
     the Procedures.

          2.   QUARTERLY REPORTING REQUIREMENTS.  Each Access Person must file a
     quarterly report with the Compliance  DEPARTMENT WITHIN 10 CALENDAR DAYS OF
     QUARTER-end with respect to all Securities Transactions of the types listed
     in Section 2 of the  Procedures  occurring  during that past  quarter.  The
     procedures  to be  followed  in making  quarterly  reports are set forth in
     Section 7 of the Procedures.

          3.   BROKERAGE  STATEMENTS. Each Access  Person  must  disclose to the
     Compliance   Department   all  of  his  or  her   brokerage   accounts  and
     relationships  and must require  such brokers to forward to the  Compliance
     Department copies of confirmations of account transactions.

                                       6

<PAGE>

          4.   EXEMPTION FOR CERTAIN TRUSTEES. The reporting requirements in the
     three preceding  paragraphs shall not apply to any trustee of GMO Trust who
     is not an "interested person" (as defined in the 1940 Act) of a GMO Fund.

          5.   REVIEW  OF REPORTS. The   Compliance  Officer  shall  review  and
     maintain each Access  Person's reports filed pursuant to Sections 2.D.1 and
     .2 of this Code and brokerage statements filed pursuant to Section 2.D.3 of
     this Code.

          6.   AVAILABILITY  OF REPORTS. All information  supplied  pursuant  to
     this Code will generally be maintained in a secure and confidential manner,
     but may be made available (without  notice to Access Person) for inspection
     to the directors, trustees or equivalent persons of each GMO Entity employ-
     ing the Access  Person,  the  Board  of  Trustees  of  each  GMO  Fund, the
     Conflicts of Interest Committee, the Compliance Department,  the Compliance
     Officer, the Access Person's  department  manager (or designee),  any party
     to which any investigation  is  referred by any of the foregoing,  the SEC,
     any state securities commission, and any attorney or agent of the foregoing
     or of the GMO Funds.

                              III. FIDUCIARY DUTIES

     A.   CONFIDENTIALITY.   Access  Persons  are   prohibited   from  revealing
information relating to the investment  intentions,  activities or portfolios of
the Funds  and  Accounts,  except  to  persons  whose  responsibilities  require
knowledge of such information.

     B.   GIFTS. The following provisions on gifts apply to all Access Persons.

          1.   ACCEPTING GIFTS.   On occasion, because of their affiliation with
     the Funds or Accounts, Access Persons may be offered, or may  receive with-
     out notice, gifts from clients, brokers,  vendors,  or  other  persons  not
     affiliated with any GMO Entity.  Acceptance of extraordinary or extravagant
     gifts is not  permissible.  Any such gifts must be  declined or returned in
     order to protect the  reputation and integrity of the GMO Funds and the GMO
     Entities.  Gifts of a nominal value (I.E.,  GIFTS WHOSE REASONABLE VALUE IS
     NO MORE THAN $100 A YEAR),  AND  CUSTOMARY  BUSINESS  MEALS,  ENTERTAINMENT
     (E.G., sporting EVENTS), AND PROMOTIONAL ITEMS (E.G., pens, mugs, T-shirts)
     may be accepted.

          If an Access Person  receives any gift that might be prohibited  under
     this Code, the Access Person must inform the Compliance Department.

          2.   SOLICITATION OF GIFTS.  Access  Persons may not solicit  gifts or
     gratuities.

     C.   SERVICE AS A DIRECTOR.  Pursuant to the provisions of Section 2.D.1 of
this  Code,  Access  Persons  must  report  any  service  as  a  director  of  a
publicly-held  company (other than the GMO Entities,  their affiliates,  and the
Funds).  The  Compliance   Department  shall  review  at  the  outset  and  from
time-to-time the  appropriateness  of such service in light of the objectives of
this Code.  The Compliance  Department may in certain cases  determine that such
service is inconsistent

                                       7

<PAGE>

with these  objectives;  and it may in others  require that the affected  Access
Person be isolated,  through a "Chinese  Wall" or other  procedures,  from those
making  investment  decisions  related to the  issuer on whose  board the person
sits.

                     IV. COMPLIANCE WITH THIS CODE OF ETHICS

     A.   CONFLICTS OF INTEREST COMMITTEE

          1.  MEMBERSHIP, VOTING AND QUORUM. The Conflicts of Interest Committee
     shall initially consist of Scott Eston, Forrest Berkley and Bill Royer. The
     Conflicts  of  Interest  Committee  shall  vote by  majority  vote with two
     members  serving as a quorum.  Vacancies  may be filled and, in the case of
     extended absences or periods of unavailability, alternates may be selected,
     by a majority vote of the remaining members of the Committee.

          2.  INVESTIGATING VIOLATIONS OF THE CODE. The Compliance Department is
     responsible for investigating any suspected violation of the Code and shall
     report the  results of each  investigation  to the  Conflicts  of  Interest
     Committee. The Conflicts of Interest Committee is responsible for reviewing
     the results of any investigation of any reported or suspected  violation of
     the Code.  Any  violation  of the Code will be  reported  to the  Boards of
     Trustees of the GMO Funds no less frequently than each quarterly meeting.

          3. ANNUAL REPORTS. The Conflicts of Interest Committee will review the
     Code at least once a year, in light of legal and business  developments and
     experience in  implementing  the Code, and will provide a written report to
     the Board of Trustees of each GMO Fund:

               a.  Summarizing existing procedures concerning personal investing
          and any changes in the procedures made during the past year;

               b.  Identifying  material  issues  under this Code since the last
          report to the Board of Trustees of the GMO Funds,  including,  but not
          limited to, any material  violations of the Code or sanctions  imposed
          in  response  to  material   violations  or  pattern  of  non-material
          violation or sanctions;

               c.  Identifying any recommended changes in existing  restrictions
          or  procedures  based  on its  experience  under  the  Code,  evolving
          industry practices, or developments in applicable laws or regulations;
          and

               d. Certifying to the Boards of Trustees of the GMO Funds that the
          applicable GMO Entities have adopted procedures  reasonably  necessary
          to prevent Access Persons from violating the Code.

                                       8

<PAGE>

          4. REVIEW OF DENIED TRADES. The process and standards for Conflicts of
     Interest Committee review of denied trades is set forth in Section 3 of the
     Procedures and Appendix A thereto.

     B.   REMEDIES

          1.   SANCTIONS. If the Conflicts of Interest Committee determines that
     an Access  Person has  committed a violation of the Code,  the Conflicts of
     Interest  Committee may impose sanctions and take other actions as it deems
     appropriate,  including  a letter of  caution  or  warning,  suspension  of
     personal  trading  rights,   suspension  of  employment  (with  or  without
     compensation),  fine,  civil referral to the SEC,  criminal  referral,  and
     termination of the  employment of the violator for cause.  The Conflicts of
     Interest  Committee  also may  require  the Access  Person to  reverse  the
     trade(s)  in question  and  forfeit  any profit or absorb any loss  derived
     therefrom.  In such cases,  the amount of profit shall be calculated by the
     Conflicts  of Interest  Committee  and shall be  forwarded  to a charitable
     organization selected by the Conflicts of Interest Committee.  No member of
     the Conflicts of Interest Committee may review his or her own transaction.

          2.   REVIEW. Whenever the Conflicts of Interest  Committee  determines
     that an Access  Person has  committed a violation  of this Code that merits
     remedial  action,  it will report no less  frequently than quarterly to the
     Boards of Trustees of the applicable GMO Funds, information relating to the
     investigation of the violation, including any sanctions imposed. The Boards
     of  Trustees  of the GMO  Funds  may  modify  such  sanctions  as they deem
     appropriate. Such Boards shall have access to all information considered by
     the Conflicts of Interest  Committee in relation to the case. The Conflicts
     of Interest  Committee may determine whether or not to delay the imposition
     of any sanctions pending review by the applicable Board of Trustees.

          3.   REVIEW OF  PRE-CLEARANCE DECISIONS. Upon  written  request by any
     Access  Person,  the Conflicts of Interest  Committee  may review,  and, if
     applicable,  reverse any request for pre-clearance denied by the Compliance
     Department (or a designee).

     C.  EXCEPTIONS TO THE CODE. Although exceptions to the Code will rarely, if
ever,  be  granted,  the  Compliance  Department  may  grant  exceptions  to the
requirements  of the Code on a case by case basis if the  Compliance  Department
finds that the proposed conduct involves  negligible  opportunity for abuse. All
such  exceptions  must be in  writing  and must be  reported  by the  Compliance
Department as soon as practicable to the Conflicts of Interest  Committee and to
the  Boards of  Trustees  of the GMO  Funds at their  next  regularly  scheduled
meeting after the exception is granted.

     D.  COMPLIANCE CERTIFICATION. At least once a year, all Access Persons will
be required to certify that they have read,  understand  and  complied  with the
Code and the Procedures.

                                       9

<PAGE>

     E.  INQUIRIES REGARDING THE CODE. The Compliance Department will answer any
questions  about  this  Code,  the  Procedures  or any other  compliance-related
matters.

                         V. BOARDS OF TRUSTEES APPROVALS

     A.   Approval of Code. The Boards of Trustees of the GMO Funds, including a
majority of the Trustees who are not  "interested  persons"  under the 1940 Act,
must approve the Code based upon a determination that it contains the provisions
reasonably  necessary  to  prevent  Access  Persons  from  engaging  in  conduct
prohibited by Rule 17j-1 under the 1940 Act.

     B.   Amendments to Code. The Boards of Trustees of the GMO Funds, including
a majority of the Trustees who are not "interested  persons" under the 1940 Act,
must approve any material  amendment  to the Code or the  Procedures  within six
months of such change.

                                       10

<PAGE>





                                                                      APPENDIX 1

                                   DEFINITIONS

     "ACCESS PERSON" means:

     (1)  every trustee,  officer,  or member of Grantham,  Mayo, Van Otterloo &
          Co. LLC,  Dancing  Elephant,  Ltd., GMO Australia  Ltd., GMO Renewable
          Resources LLC, GMO Woolley Ltd., or any of the GMO Funds;

     (2)  every employee or on-site  consultant of a GMO Entity (or a company in
          a control  relationship  with any of the foregoing) who, in connection
          with his or her regular functions,  makes, participates in, or obtains
          information  regarding the purchase or sale of a Security by a Fund or
          an  Account,   or  whose  functions   relate  to  the  making  of  any
          recommendations with respect to such purchases or sales;

     (3)  every natural person in a control  relationship with a GMO Entity or a
          GMO Fund who obtains information concerning  recommendations made to a
          Fund or an Account  with regard to the purchase or sale of a Security,
          prior to its  dissemination or prior to the execution of all resulting
          trades;

     (4)  such  other  persons  as the Legal  and  Compliance  Department  shall
          designate.  Initially,  the  Compliance  Department HAS DESIGNATED ALL
          EMPLOYEES AND ON-site  consultants  of GMO Entities and all members of
          Grantham, Mayo, Van Otterloo & Co. LLC as Access Persons.

Any  uncertainty  as to  whether an  individual  is an Access  person  should be
brought  to the  attention  of the  Compliance  Department,  which will make the
determination in all cases.

     "BENEFICIAL  INTEREST"  means  the  opportunity,  directly  or  indirectly,
through any contract, arrangement, understanding,  relationship or otherwise, to
profit,  or share in any profit  derived  from,  a  transaction  in the  subject
Securities.  An  Access  Person  is  deemed  to have a  Beneficial  Interest  in
Securities owned by members of his or her Immediate  Family.  Common examples of
Beneficial  Interest include joint accounts,  spousal  accounts,  UTMA accounts,
partnerships,  trusts and controlling interests in corporations. Any uncertainty
as to whether an Access Person has a Beneficial Interest in a Security should be
brought to the attention of the Legal and Compliance Department.  Such questions
will be resolved in accordance  with, and this  definition  shall be subject to,
the  definition  of  "beneficial  owner"  found  in  Rules  16a-1(a)(2)  and (5)
promulgated under the Securities Exchange Act of 1934.

     "CODE" means this Code of Ethics, as amended.

                                       11

<PAGE>

     "COMPLIANCE  DEPARTMENT"  means  the  Legal and  Compliance  Department  of
Grantham,  Mayo, Van Otterloo & Co. LLC. Communications received under this Code
to be directed to the  Compliance  Department  in the first  instance  should be
directed to the Compliance Officer.

     "COMPLIANCE  OFFICER" means the Compliance  Officer of Grantham,  Mayo, Van
Otterloo & Co. LLC, Julie Perniola.

     "GMO  ACTIVE  PORTFOLIO"  means  any Fund or  Account  that is  managed  by
application of traditional  (rather than  quantitative)  INVESTMENT  TECHNIQUES,
which includes  International  Active,  Domestic  Active,  Emerging  Markets and
Global Properties.

     "GMO ACCOUNT" AND "ACCOUNT" mean any  investments  managed for a U.S. based
client by a GMO entity,  including private investment accounts,  ERISA pools and
unregistered pooled investment vehicles.

     "GMO  ENTITY"  means  Grantham,  Mayo,  Van  Otterloo  & Co.  LLC,  Dancing
Elephant,  Ltd., GMO Australia Ltd., GMO Australia LLC, GMO Renewable  Resources
LLC, or GMO Woolley Ltd.

     "EQUIVALENT  SECURITY"  means any Security issued by the same entity as the
issuer of a subject Security,  including  options,  rights,  stock  appreciation
rights,  warrants,  preferred stock, restricted stock, phantom stock, bonds, and
other  obligations of that company or security  otherwise  convertible into that
security.

     "GMO FUND" AND "FUND" mean an investment  company registered under the 1940
Act (or a portfolio or series thereof, as the case may be), including GMO Trust,
for which any of the GMO Entities serves as an adviser or sub-adviser.

     "IMMEDIATE  FAMILY"  of an Access  Person  means any of an Access  Person's
spouse and minor  children who reside in the same  household.  Immediate  Family
includes  adoptive  relationships  and any other  relationship  (whether  or not
recognized by law) which the Compliance  Department determines could lead to the
possible  conflicts of interest or appearances of impropriety which this Code is
intended to prevent. The Compliance  Department may from time-to-time  circulate
such expanded definitions of this term as it deems appropriate.

     "PROCEDURES"  means the Master Personal  Trading Policies and Procedures of
Grantham, Mayo, Van Otterloo & Co. LLC, from time-to-time in effect and attached
hereto as Appendix 2.

     "SEC" means the Securities and Exchange Commission.

     "SECURITY" shall have the meaning set forth in Section 2(a)(36) of the 1940
Act, except that it shall not include securities issued by the Government of the
United States,  bankers' acceptances,  bank certificates of deposit,  commercial
paper,   high  quality   short-term  debt  instruments,   including   repurchase
agreements,  and shares of registered  open-end  investment  companies,  or such
other securities as may be excepted under the provisions of Rule 17j-1.

                                       12

<PAGE>

     "SECURITIES TRANSACTION" means a purchase or sale of Securities in which an
Access  Person or a member of his or her  Immediate  Family  has or  acquires  a
Beneficial  Interest.  A donation of  securities  to a charity is  considered  a
Securities Transaction.

                                       13



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