VANGUARD/WELLESLEY INCOME FUND INC
N-30D, 2000-03-02
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<PAGE>

VANGUARD
WELLESLEY(R) INCOME
FUND
ANNUAL REPORT
DECEMBER 31, 1999

[SHIP GRAPHIC]
[A MEMBER OF THE VANGUARD GROUP LOGO]

<PAGE>

[PHOTO OF JOHN C. BOGLE]
JOHN C. BOGLE

FELLOW SHAREHOLDERS:

TWO ROADS  DIVERGED IN A WOOD,  AND I--I TOOK THE ONE LESS TRAVELED BY, AND THAT
HAS MADE ALL THE DIFFERENCE.

I can think of no better  words than those of Robert Frost to begin this special
letter to our shareholders,  who have placed such extraordinary  trust in me and
in Vanguard  over the past quarter  century.  When the firm was founded 25 years
ago,  we  deliberately  took a new road to  managing a mutual  fund  enterprise.
Instead of having the funds controlled by an outside management company with its
own  financial  interests,  the  Vanguard  funds--there  were  only  11 of  them
then--would be controlled by their own  shareholders and operate solely in their
financial interests.  The outcome of our unprecedented  decision was by no means
certain. We described it then as "The Vanguard Experiment."

         Well, I guess it's fair to say it's an experiment  no more.  During the
past 25 years,  the assets we hold in stewardship  for investors have grown from
$1 billion to more than $500  billion,  and I believe  that our  reputation  for
integrity,  fair-dealing,  and sound investment  principles is second to none in
this  industry.  Our  staggering  growth--which  I  never  sought--has  come  in
important part as a result of the simple investment ideas and basic human values
that are the foundation of my personal philosophy.  I have every confidence that
they  will  long  endure at  Vanguard,  for they are the  right  ideas and right
values, unshakable and eternal.

         While Emerson believed that "an institution is the lengthened shadow of
one man," Vanguard today is far greater than any  individual.  The Vanguard crew
has splendidly implemented and enthusiastically supported our founding ideas and
values, and deserves the credit for a vital role in forging our success over the
years.  It is a  dedicated  crew of fine human  beings,  working  together in an
organization  that is well prepared to press on regardless long after I am gone.
Creating and leading this  enterprise has been an exhilarating  run.  Through it
all,  I've taken the kudos and the blows  alike,  enjoying  every  moment to the
fullest, and even getting a second chance at life with a heart transplant nearly
four years ago. What more could a man ask?

         While I shall no longer be serving  on the  Vanguard  Board,  I want to
assure you that I will remain  vigorous and active in a newly  created  Vanguard
unit, researching the financial markets, writing, and speaking. I'll continue to
focus whatever  intellectual  power and ethical strength I possess on my mission
to assure that mutual fund  investors  everywhere  receive a fair shake.  In the
spirit of Robert Frost:

         BUT I HAVE PROMISES TO KEEP, AND MILES TO GO BEFORE I SLEEP,  AND MILES
TO GO BEFORE I SLEEP.

         You have given me your  loyalty and  friendship  over these long years,
and I deeply  appreciate  your  thousands of letters of support.  For my part, I
will continue to keep an eagle eye on your  interests,  for you deserve no less.
May God bless you all, always.

/S/
JCB
- ------------------------------------------
CONTENTS

REPORT FROM THE CHAIRMAN            1
AFTER-TAX RETURNS REPORT            5
NOTICE TO SHAREHOLDERS              6
THE MARKETS IN PERSPECTIVE          7
REPORT FROM THE ADVISER             9
PERFORMANCE SUMMARY                 11
FUND PROFILE                        12
FINANCIAL STATEMENTS                16
REPORT OF INEPENDENT ACCOUNTANTS    26
- ------------------------------------------

<PAGE>

REPORT FROM THE CHAIRMAN

[PHOTO OF JOHN J. BRENNAN]
JOHN J. BRENNAN

Vanguard  Wellesley  Income Fund  recorded a -4.1% return  during 1999 as rising
interest  rates  sliced  the  prices of our bond  holdings  and hurt many of our
income-oriented,   interest-rate-sensitive   stocks.  Our  disappointing  return
trailed  both the 5.0% return of the average  income fund and the -1.4%  decline
for our unmanaged index benchmark.

         The table at right  presents the fund's total  return  (capital  change
plus reinvested dividends) and those of its comparative standards. The Wellesley
Composite  Index is constructed of market  benchmarks  weighted in proportion to
our typical investment mix of 65% bonds and 35% high-yielding stocks.
- -------------------------------------------------------
                                         TOTAL RETURNS
                                          YEAR ENDED
                                      DECEMBER 31, 1999
- -------------------------------------------------------
Vanguard Wellesley Income Fund              -4.1%
- -------------------------------------------------------
Average Income Fund*                         5.0%
- -------------------------------------------------------
Wellesley Composite Index**                 -1.4%
- -------------------------------------------------------
 *Derived from data provided by Lipper Inc.
**65% Lehman Long Corporate AA or Better Index,
  26% S&P 500/BARRA  Value Index, 4.5% S&P Utilities
  Index, and 4.5% S&P Telephone Index.

         Our return is based on a decrease  in net asset  value from  $22.12 per
share on December 31, 1998,  to $18.85 per share on December 31, 1999,  adjusted
for  dividends  totaling  $1.12 per share  paid from net  investment  income and
distributions totaling $1.245 per share paid from net realized capital gains. At
year-end, our annualized yield was 5.7%, up from 4.8% on December 31, 1998.

FINANCIAL MARKETS IN REVIEW

The U.S. economy's rapid growth during 1999--gross  domestic product expanded by
around  4%--surprised  the  financial  markets.  For bond  investors,  it was an
unhappy surprise, as interest rates rose substantially. The uptrend in rates was
encouraged  by  Federal  Reserve  Board  policymakers,  who  boosted  short-term
interest  rates in three  steps by a total of 0.75  percentage  point  (75 basis
points).

         Bond prices  are, of course,  tightly  linked to  interest  rates,  and
rising rates cause prices of existing bonds to fall.  Interest rates rose across
all  maturities  in 1999,  and  prices  dropped  accordingly.  The  yield of the
benchmark  30-year U.S.  Treasury  bond stood at 6.48% on December 31, 138 basis
points above its 5.10% yield when the year began.  Long-term  bonds were hardest
hit by the rise in rates, as always, and their prices fell almost 15% during the
year.  The total return of the Lehman  Brothers  Aggregate  Bond Index,  a broad
measure of the U.S.  bond market,  was -0.8%,  as a price  decline of -7.0% more
than offset interest income of 6.2%.  Rates also rose on short-term money market
instruments, though not as much as for long-term securities. The yield of 90-day
Treasury bills increased 88 basis points during 1999 to 5.33% at year-end.

         Somewhat  surprisingly,  rising  interest rates merely slowed the stock
market's long bull market.  Higher rates can depress stock prices by making bond
yields more attractive. Also, higher rates lessen the current value of projected
future  earnings.   But  during  1999,  investors  decided  that--at  least  for
fast-growing   technology   stocks--prospects   for  bigger  corporate   profits
outweighed the negative impact of higher rates.

         The  U.S.  stock  market  in  1999  rode  the  technology  wave  to  an
unprecedented  fifth consecutive year of returns exceeding 20%. This performance
was  something  of a  come-from-behind  story.  Stocks got off to a strong start
during the first  four  months

                                       1
<PAGE>

of the year but  struggled in the face of higher  interest  rates during most of
the summer and into the fall. Through September,  the Wilshire 5000 Total Market
Index returned 4.6%. But  technology  stocks  rallied,  leading the market on an
upward tear over the final three months of 1999. The Wilshire  5000's  full-year
return was a remarkable  23.8%,  and the  Standard & Poor's 500 Index,  which is
dominated by large-capitalization stocks, returned 21.0%.

         The rise for the major indexes in 1999 suggests a broad advance for the
market,  but in fact it was a year of "haves" and "have  nots"--a huge number of
stocks did not join in the market's  ascent.  Fully 60% of the stocks  listed on
the New York Stock Exchange  actually  declined in price in 1999, and so did 48%
of the stocks listed on the Nasdaq market.  (In fact, 36% of NYSE stocks and 31%
of Nasdaq issues fell by more than 20%.) The main "haves" were  companies in the
technology  sector--where  stocks gained more than 70% for the year--along  with
companies  involved in wireless and cable  telecommunications.  The skyrocketing
technology  group was  responsible for growth stocks far outpacing value stocks;
within the S&P 500 Index,  for example,  growth  stocks gained 28.2% while value
stocks were up 12.7%.

1999 PERFORMANCE OVERVIEW

Vanguard Wellesley Income Fund was hit hard by the rise in interest rates during
1999.  We  suffered  from a double  whammy--declines  in both our bond and stock
holdings.  Our  bond  segment,  which  accounts  for  60% to 65% of our  assets,
returned -5.3%,  after expenses.  While this was a poor absolute return,  it was
ahead of the -7.0% return for the Lehman Long Corporate AA or Better Bond Index,
our fixed-income benchmark.

         Our adviser,  Wellington  Management Company,  expected higher interest
rates and reduced the interest rate  sensitivity of the fund's bond portfolio as
the year progressed.  This move mitigated,  but could not avert, the damage done
by the rise in  market  rates.  When  compared  with the  average  income  fund,
Wellesley's  bond  segment  has a  longer  average  maturity  and  duration--and
therefore is more sensitive to changes in interest rates. This distinction works
in our favor during periods of stable or falling interest rates, as in 1998. But
it worked against us last year.

         The level of interest  rates also can affect  stock  prices.  Wellesley
Income  Fund's  heavy  commitment  to  financial-services  and  electric-utility
stocks,  which tend to be sensitive to changing interest rates, hurt our results
in 1999. As a group,  our stocks had a negative return of -2.7% during the year,
while the stock portion of our composite index benchmark earned 9.3%.

         Electric  utilities  had a  money-losing  year  across  the  board--our
utility  holdings  were down -9.2%.  Financial  stocks  within the S&P 500 Index
gained only 5.0% as a group,  and ours  actually  declined due to  disappointing
earnings  reports from some large holdings,  such as National City and Wachovia.
We also were hurt badly by poor results for several large retailing and consumer
products  companies we owned,  including J.C.  Penney,  H.J.  Heinz,  and Philip
Morris.   And  our  lack  of  technology   stocks,   a  group  that  offers  few
dividend-paying  issues, was a big handicap.  On the other hand, we saw a payoff
from our big  commitment  to energy  stocks  (nearly 20% of assets during 1999).
Even though this group lagged the overall market slightly, our oil stocks gained
a bit more than 25% over the year.

         As a result of its  continuous  analysis of Wellesley  Income Fund, the
Board of Trustees  has  approved a change in the  benchmark  for the fund's bond
segment,  effective April 1, 2000. The new benchmark,  the Lehman Corporate A or
Better  Index,  maintains a shorter  duration (5.5 years) than the old benchmark
(9.1 years).

                                       2
<PAGE>

         As the  fund's  holdings  change  to  reflect  the new  benchmark,  the
emphasis of our  fixed-income  portfolio will shift to  intermediate-term  bonds
with an  average  quality  rating of A or better.  We don't  expect the shift to
significantly  affect long-term returns, but it should reduce by roughly 30% the
fluctuations  in our bond  segment's  price in  response  to a given  change  in
interest rates. The bond  portfolio's  interest rate sensitivity will be in line
with that of peer funds,  most of which  emphasize  intermediate-term  bonds. By
including  A-rated  bonds in the  universe  from  which our  adviser  may select
securities, we significantly expand the number of high-quality  investment-grade
bonds  available for the fund, thus  increasing the adviser's  flexibility.  The
change to the Lehman  Corporate A or Better Index is discussed in more detail in
the note on page 6.

         Although the rise in interest  rates during 1999 reduced the fund's net
asset value,  Wellesley's  5.7%  annualized  yield at year-end was nearly a full
percentage  point higher than a year earlier.  For long-term  investors who take
advantage of the power of  compounding,  higher  yields are good news: At a 4.8%
annual rate, an investment  doubles in about 15 years, while at 5.7%, it doubles
in about 12.5 years.

LONG-TERM PERFORMANCE OVERVIEW

Despite a tough year in 1999,  Wellesley Income Fund's long-term record is good,
both on an  absolute  basis and in  relation to peers.  In the table  below,  we
present a decade's  returns  for  Wellesley  and our  benchmarks,  showing how a
hypothetical  $10,000  investment  in  each  would  have  grown,   assuming  the
reinvestment of income  dividends and capital gains  distributions.  Wellesley's
average annual return of 10.6% during the 1990s was 0.7 percentage  point higher
than the 9.9% return for the average income fund.  Although that margin may seem
slim,  its impact is widened by  compounding:  Over a decade,  it  resulted in a
$1,626  advantage  for  Wellesley  in  the  value  of the  hypothetical  $10,000
investments.The source of our advantage during the 1990s can be summed up in two
words: low costs. Wellesley Income Fund's expense ratio (operating expenses as a
percentage  of average  net  assets)  was 0.30%,  or $3.00 per $1,000 in assets,
about  one-quarter of the  1.18%--$11.80  per $1,000 in  assets--charged  by the
average  income fund.  Vanguard's low costs and sound  investment  management by
Wellington   Management   Company   combined   to  create  good  value  for  our
shareholders.
- ------------------------------------------------------------------
                                          TOTAL RETURNS
                                TEN YEARS ENDED DECEMBER 31, 1999
                               -----------------------------------
                                  AVERAGE      FINAL VALUE OF
                                  ANNUAL          A $10,000
                                  RETURN      INITIAL INVESTMENT
- ------------------------------------------------------------------
Vanguard Wellesley Income Fund     10.6%          $27,299
- ------------------------------------------------------------------
Average Income Fund                 9.9%          $25,673
- ------------------------------------------------------------------
Wellesley Composite Index*         10.7%          $27,596
- ------------------------------------------------------------------
*65% Lehman Long Corporate AA or Better Index,  26% S&P 500/BARRA
 Value Index, 4.5% S&P Utilities Index, and 4.5% S&P Telephone
 Index.

         Over  the past  decade,  we fell  just a tenth of a point  short of our
index benchmark's return. Of course, we cannot outdo the composite index when it
comes to cost, since the index is a theoretical  construct that has no operating
or transaction costs at all. Yet our low costs give us a fighting chance to beat
the index, and we aim to do so in the years ahead.

         The  double-digit  return that Wellesley  Income Fund earned during the
past ten years reflects a golden decade for financial  assets. It was well above
the  long-term  historical  average of about 8% for our target  asset mix of 65%
bonds and 35% stocks.  This was  principally  due to the fantastic  stock market
returns experienced during the period. The U.S. stock market, as measured by the
Wilshire  5000 Index,  produced  an average  annual  return of 17.6%  during the
1990s, more than 1 1/2 times the average  return of about 11% achieved by

                                       3
<PAGE>

stocks since 1925.  The S&P 500/BARRA  Value Index,  a better  benchmark for the
kinds of stocks owned by Wellesley, returned an average of 15.4% annually during
the decade.

         In part,  the big  returns of the past decade  reflect  the  underlying
growth in the U.S.  economy and in  corporate  profits.  But another part of the
gains can be traced to  growing  optimism  about  stocks  and less fear of their
risks.  These changes in perception are reflected in the  extraordinary  rise in
the average  stock's  price/earnings  ratio--from  about 16 as the decade of the
1990s began to an  unprecedented  33 when it ended.  No one knows whether or how
investor  perceptions will change.  But we note that the moods of markets,  like
the moods of the  millions of  individuals  who make up the  markets,  can shift
dramatically.

         In  constructing  long-term  plans,  you should  realize that financial
markets  will go through bad times as well as good times.  It's prudent to adopt
realistic  assumptions about future returns. We don't believe it is realistic to
expect the next decade to be as rewarding as the past one. This isn't a forecast
of doom. If inflation remains in the neighborhood of 3% annually,  it would take
stock  returns  of  only 8% to 9% a year to  provide  decent  inflation-adjusted
returns  of 5% to 6%.  If  long-term  bond  returns  approximate  their  current
yields--and  that's the best guess to make--the current yields of nearly 6.5% on
long-term  U.S.  Treasury  securities  translate  into a real return of nearly 4
percentage points over recent inflation rates.

IN SUMMARY

Although  financial markets are fickle,  the fundamentals of sound investing are
not.  Vanguard  believes the  foundation  of an investment  program  starts with
consideration of your investment time horizon,  goals, financial situation,  and
tolerance for market  fluctuations.  The next step is to construct a diversified
portfolio  of  bonds,   stocks,  and  short-term  reserves  that  allow  you  to
participate in the long-term  rewards of investing  while being prepared for the
ever-present  risks. Such a balanced approach is what Vanguard  Wellesley Income
Fund is all about.

/s/
John J. Brennan
Chairman and Chief Executive Officer

January 18, 2000

- --------------------------------------------------------------------------------
A NOTE OF THANKS TO OUR FOUNDER
- --------------------------------------------------------------------------------
As you may have read on the inside  cover of our report,  our  founder,  John C.
Bogle,  retired on  December  31,  1999,  as Senior  Chairman of our Board after
nearly 25 years of devoted  service to Vanguard and our  shareholders.  Vanguard
investors  have Jack to thank for  creating a truly  mutual  mutual fund company
that operates solely in the interest of its fund  shareholders.  And mutual fund
investors  everywhere have benefited from his energetic  efforts to improve this
industry.  Finally, on a personal note, I am forever grateful to Jack for giving
me the opportunity to join this great company in 1982.

                                       4
<PAGE>

A REPORT ON YOUR FUND'S AFTER-TAX RETURNS

Beginning  with this annual  report,  Vanguard is pleased to provide a review of
Wellesley  Income  Fund's  after-tax  performance.  The  figures  on  this  page
demonstrate  the  considerable  impact that  federal  income taxes can have on a
fund's return--an important  consideration for investors who own mutual funds in
taxable  accounts.  While the pretax return is most often used to tally a fund's
performance,   the  fund's  after-tax  return,   which  accounts  for  taxes  on
distributions of capital gains and income dividends,  is a better representation
of the return that many investors actually received. If you own Wellesley Income
Fund in a  tax-deferred  account such as an individual  retirement  account or a
401(k), this information does not apply to you. Such accounts are not subject to
current taxes.

         The table below presents the pretax and after-tax returns for your fund
and an appropriate peer group of mutual funds. Two things to keep in mind:

         o The  after-tax  return  calculations  use the top federal  income tax
rates in effect at the time of each  distribution.  The tax  burden,  therefore,
would be somewhat  less,  and the after-tax  return  somewhat more, for those in
lower tax brackets.

         o The peer funds' returns are provided by Morningstar,  Inc. (Elsewhere
in this  report,  returns for  comparable  mutual  funds are  derived  from data
provided by Lipper Inc., which differ somewhat.)

         For shareholders in the highest tax bracket,  Wellesley's  pretax total
return of -4.1% for the 12 months ended  December 31, 1999, was reduced by taxes
to -7.4%, a difference of 3.3  percentage  points.  In  comparison,  the average
return for  Morningstar's  "domestic  hybrid" category was 8.8% before taxes and
6.5% after taxes,  a difference of 2.3  percentage  points.  The average fund in
this category holds a larger  percentage of assets in stocks,  which have helped
to boost pretax returns and also tend to be more tax-efficient than bonds, which
derive most of their returns from income, not capital gains.
<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------------------------
                                        AVERAGE ANNUAL RETURNS: PRETAX AND AFTER-TAX
                                              PERIODS ENDED DECEMBER 31, 1999
                           -----------------------------------------------------------------------
                                1 YEAR                     5 YEARS                  10 YEARS
                           ------------------         -----------------         ------------------
                           PRETAX   AFTER-TAX         PRETAX  AFTER-TAX         PRETAX   AFTER-TAX
- --------------------------------------------------------------------------------------------------
<S>                          <C>    <C>                <C>    <C>                 <C>    <C>
Wellesley Income Fund      -4.1%      -7.4%           12.7%     9.1%            10.6%       7.4%
Average Domestic
 Hybrid Fund*               8.8        6.5            15.6     12.7             11.4        8.8
- --------------------------------------------------------------------------------------------------
*Based on data from Morningstar, Inc.
</TABLE>

         Over the past ten years, Wellesley Income Fund's pretax return of 10.6%
per year was reduced by an average of 3.2 percentage  points. The average pretax
return for  domestic  hybrid funds was 11.4%.  Taxes  reduced that return by 2.6
percentage points.

         We  stress  that  because   many   interrelated   factors   affect  how
tax-friendly  a fund may be, it's very  difficult to predict tax  efficiency.  A
fund's tax  efficiency  can be  influenced  by its turnover  rate,  the types of
securities it holds, the accounting  practices it uses when selling shares,  and
the net cash flow it receives.

         Finally,  it's important to understand  that our  calculation  does not
reflect  the effect of your own  investment  activities.  Specifically,  you may
incur additional capital gains taxes--thereby lowering your after-tax return--if
you decide to sell all or some of your shares.

A  NOTE  ABOUT  OUR   CALCULATIONS:   Pretax  total  returns   assume  that  all
distributions   received  (income  dividends,   short-term  capital  gains,  and
long-term  capital  gains) are  reinvested  in new shares,  while our  after-tax
returns assume that  distributions  are reduced by any taxes owed on them before
reinvestment.  When  calculating  the taxes due, we used the highest  individual
federal  income  tax  rates at the time of the  distributions.  Those  rates are
currently 39.6% for dividends and short-term capital gains and 20% for long-term
capital gains. State and local income taxes were not considered. The competitive
group returns provided by Morningstar are calculated in a manner consistent with
that used for Vanguard funds.

                                       5
<PAGE>

NOTICE TO SHAREHOLDERS
CHANGE IN BOND BENCHMARK

The Board of Trustees of Vanguard Wellesley Income Fund has approved a change in
the investment  benchmark for the bond segment of the fund,  effective  April 1,
2000.  The benchmark  will change from the Lehman  Brothers Long Corporate AA or
Better Bond Index to the Lehman Brothers Corporate A or Better Bond Index, which
represents a much larger  universe of  high-quality  bonds.  Although the fund's
prospectus  permits  investments in this larger universe of bonds,  the fund has
not previously exercised this flexibility.

         As the fund  broadens its bond  holdings to reflect the new  benchmark,
shareholders  should  benefit over the long term from reduced  volatility in the
fund's net asset value.

         In actively managing the fund, Wellington Management Company strives to
keep key characteristics of the bond portfolio--such as credit quality,  average
maturity,  and average  duration--consistent  with a bond benchmark.  The fund's
current  benchmark is significantly  more sensitive to changes in interest rates
than the new  benchmark.  As a result,  the fund has been much more sensitive to
changes in interest  rates than most other balanced  mutual funds.  For example,
the average duration of the current benchmark is 9.1 years, versus 5.5 years for
the new benchmark.  This means that a change of one percentage point in interest
rates  would  cause a change of  approximately  9.1% in the market  value of the
current benchmark and a change of about 5.5% in the value of the new benchmark.

         The second key  reason  for the  change is that the  current  benchmark
constrains  the  fund's  bond   investments  to  a  shrinking   segment  of  the
investment-grade market and limits the adviser's ability to purchase new issues,
which often have  attractive  yields  relative to bonds trading in the secondary
market. Since 1973, the percentage of the investment-grade corporate bond market
rated AA or higher has dropped from 58% to 24%. An even more dramatic  reduction
has occurred in the proportion of newly issued bonds rated AA or better.  During
1999,  only about 10% of  investment-grade  issues with a maturity of 6 years or
more  carried a credit  rating  of AA or  higher.  By  contrast,  A-rated  bonds
accounted for more than 40% of new issues.  As of year-end  1999,  239 corporate
bond issues had ratings of AA or better,  while  approximately 2,400 had ratings
of A or better.

EFFECT ON CREDIT QUALITY, YIELD, AND RETURNS

After the  benchmark  change is  implemented,  the  average  credit  quality for
Wellesley Income Fund's bond segment will be reduced slightly,  although it will
remain high, solidly within the  investment-grade  category.  As of December 31,
1999,  the yield of the  existing  benchmark,  the Lehman Long  Corporate  AA or
Better Index,  was 0.26% higher than the yield of the new benchmark,  the Lehman
Corporate A or Better Index.  However,  because of its greater price  volatility
and the narrower  universe of bonds within it, the existing  benchmark  does not
necessarily  lead to a superior  long-term  return.  The Board believes that the
benefit  from  reduced  interest  rate  risk  due to the  benchmark  change  far
outweighs  the  modest  reduction  in yield and any  reduction  in total  return
potential.

ADVISORY CONTRACT

Wellington  Management  Company's  compensation as investment adviser is tied to
the  fund's   investment   performance   relative  to  that  of  the  benchmark.
Accordingly,  the  fund's  advisory  contract  will be  amended to adopt the new
benchmark for determining  compensation  after April 1, 2000. All other terms of
the advisory contract will remain the same.

                                       6
<PAGE>

THE MARKETS IN PERSPECTIVE
YEAR ENDED DECEMBER 31, 1999

A global  expansion  in economic  activity  bolstered  stocks at home and abroad
during 1999. The muscular U.S.  economy provided a good bit of the oomph, but it
got an assist from solid growth in Asian, European, and Latin American economies
that had slumped in 1997 and 1998.

         Interest rates increased significantly--causing bond prices to fall--as
both investors and monetary policymakers grew concerned that economic growth was
so vigorous that it would cause inflation to accelerate.

U.S. STOCK MARKETS

The booming economy and growing  corporate  profits  provided plenty of fuel for
stock prices during 1999.  However,  higher interest rates  restrained the rise,
especially  for  financial-services  and  electric  utility  stocks  regarded as
interest rate sensitive.

         U.S.  economic output increased at an inflation  adjusted rate of about
4%--a very rapid pace for such a large, mature economy.  Analysts estimated that
corporate  profits  would  grow by 14% in  1999  and  again  in  2000.  Consumer
spending,  which  accounts  for roughly  two-thirds  of economic  activity,  was
strong. People felt prosperous,  thanks to the long bull market, plentiful jobs,
and rising incomes. (After-tax personal income grew by more than 5% in 1999, and
unemployment at year-end was at a three-decade low of 4.1% of the workforce.)

- --------------------------------------------------------------------------------
                                               AVERAGE ANNUAL RETURNS
                                          PERIODS ENDED DECEMBER 31, 1999
                                         --------------------------------
                                          1 YEAR      3 YEARS     5 YEARS
- --------------------------------------------------------------------------------
STOCKS
  S&P 500 Index                            21.0%       27.6%       28.6%
  Russell 2000 Index                       21.3        13.1        16.7
  Wilshire 5000 Index                      23.8        26.1        27.1
  MSCI EAFE Index                          27.3        16.1        13.2
- --------------------------------------------------------------------------------
BONDS
  Lehman Aggregate Bond Index              -0.8%        5.7%        7.7%
  Lehman 10 Year Municipal Bond Index      -1.3         4.8         7.1
  Salomon Smith Barney 3-Month
   U.S. Treasury Bill Index                 4.7         5.0         5.2
- --------------------------------------------------------------------------------
OTHER
  Consumer Price Index                      2.7%        2.0%        2.4%
- --------------------------------------------------------------------------------

         The stock market, as measured by the Wilshire 5000 Index, gained 23.8%,
with more than  three-quarters  of the gain coming in the final quarter of 1999.
For   the   first   time   in   several   years,    smaller   stocks    outpaced
large-capitalization  issues. The S&P 500 Index, which is dominated by large-cap
stocks and  accounts for more than  three-quarters  of the U.S.  stock  market's
total value, gained 21.0% during the year; the rest of the market gained 35.4%.

         Hidden  in the  market  averages  was an  amazing  divergence  in stock
performance.  Prices soared for most technology-related  stocks, but performance
was pedestrian,  at best, for most other issues. Indeed,  three-fifths of stocks
on the New York Stock Exchange fell in 1999.  The  technology  sector of the S&P
500 Index gained 74%, and the producer-durables sector, driven by huge gains for
some makers of telecommunications and technology gear, was up 49%. These results
were in stark contrast to the declines  suffered by food and beverage  companies
in the  consumer-staples  sector (-16%) and by many companies in the health-care
group (-10%).

                                       7
<PAGE>

         Investors  seemed  bedazzled by the prospects for growth in revenue and
profits among tech stocks, but less interested in the actual profits for nontech
companies.  Remarkably,  the average S&P 500 stock without earnings gained 36.5%
in 1999,  while the average  stock with  earnings  rose 11.5%.  There is general
agreement  that  growth in  Internet  commerce,  computers,  software,  wireless
communications, and other key tech sectors will be stupendous. However, there is
much  disagreement  about whether profits will grow so  impressively,  given the
intense competition. During 1999, optimists clearly ruled.

U.S. BOND MARKETS

The pickup in worldwide economic activity buoyed stock prices but depressed bond
prices.  Interest rates,  which move in the opposite direction from bond prices,
rose sharply. The rate increase stemmed from increased borrowing by corporations
and individuals and from investors'  fears that a sizzling  economy was bound to
send inflation soaring.

         The inflation  evidence was ambiguous.  Price increases were greater in
1999 than in 1998 at both the wholesale and consumer  levels.  Wholesale  prices
rose 3.0%,  the biggest gain since 1990.  And the Consumer  Price Index advanced
2.7% in 1999 after a gain of just 1.6% in 1998.  However,  energy prices,  which
plunged in 1998 and shot up in 1999, skewed the figures in both periods.  At the
consumer  level,  the "core rate" of inflation,  which  excludes food and energy
prices, was up just 1.9% in 1999, the smallest increase in 35 years.

         At midyear, the Federal Reserve Board, aiming to cool the economy a bit
to head off price pressures,  began raising  short-term  interest rates. In all,
the Fed pushed up rates by 0.75 percentage point in three  quarter-point  steps.
The bond market  anticipated  the  Fed--interest  rates began rising  sharply in
February--and  at year-end the yield of 30-year U.S.  Treasury bonds was up 1.38
percentage  points (138 basis  points) to 6.48%.  The 10-year  Treasury  note--a
benchmark  for mortgage  lenders--rose  179 basis  points,  from 4.65% to 6.44%.
Short-term  rates didn't rise as far;  3-month  Treasury  bill yields were up 88
basis points to 5.33% at year-end.

         Price declines,  as usual,  were greatest for long-term bonds and least
for short-term  bonds.  The overall market,  as measured by the Lehman Aggregate
Bond Index,  which has an  intermediate-term  average  maturity,  posted a -0.8%
total return in 1999.  Short-term bonds generally  provided returns of 2% to 3%.
Long-term  bonds  suffered  significant  price  declines,  and the  Lehman  Long
Government/Corporate Index recorded a -7.7% total return.

INTERNATIONAL STOCK MARKETS

Bullishness  among stock investors was an international  phenomenon in 1999. The
biggest gains came in Pacific-region and emerging markets that had suffered most
from economic slumps and currency crises during 1997 and 1998.

         Overall, the Morgan Stanley Capital International Europe,  Australasia,
Far East (EAFE)  Index of major  developed  markets  produced a 27.3% return for
U.S.  dollar-based  investors.  The MSCI Pacific Free Index gained an astounding
56.4% for U.S. investors,  as a strong rise in the Japanese yen against the U.S.
dollar  tacked  on about  12.5  percentage  points  to a 43.9%  return  in local
currencies.  In Europe,  currency fluctuations had the opposite effect: European
currencies,  including the new 11-nation common currency,  the euro, mostly fell
against the dollar,  and the 30.3% return in local  currencies was nearly halved
to 15.8% in U.S. dollars.

         Emerging markets managed a stunning turnaround,  as the Select Emerging
Markets Free Index rose 60.9% in U.S.-dollar terms after having plummeted -18.4%
in 1998 and -16.4% in 1997.

                                       8
<PAGE>

REPORT FROM THE ADVISER

Vanguard  Wellesley Income Fund  underperformed  its unmanaged  benchmark during
1999,  returning  -4.1% versus the -1.4% decline of the composite index weighted
to reflect our usual allocation of 65% bonds and 35% stocks.

         The fund's stock segment  returned -2.7% for the year, a  disappointing
contrast to its previous increases of 15.6% in 1998, 32.8% in 1997, and 24.2% in
1996.  The stock  portfolio's  return also was well behind the 9.3% gain for the
equity  portion  of our  index  benchmark,  which  is  weighted  75% in the  S&P
500/BARRA Value Index,  12.5% in the S&P Utilities  Index,  and 12.5% in the S&P
Telephone   Index.   We  lagged  this   standard   primarily   because  we  hold
higher-yielding  stocks than those in the composite benchmark,  and the market's
best  performers  in 1999 were stocks that paid  little or no  dividends.  Among
sectors our largest area of underperformance was technology, where Wellesley had
no representation because few tech stocks can meet our income-oriented charter.

         The bond  segment's  net  return of -5.3% for the year was ahead of the
- -7.0% return for the Lehman Long Corporate AA or Better Index,  against which we
have  measured  our  performance.  Nonetheless,  our bond segment had one of its
worst years ever in absolute  terms,  a painful  reminder of what happens to the
prices of long-term bonds when interest rates rise sharply.  During the year, we
reduced the interest rate risk of the Wellesley bond portfolio by shortening its
duration meaningfully. This shorter duration should help performance relative to
the index if long-term  rates  continue to rise.  Our shorter  duration  implies
that, with a given change in interest rates, the bond segment's prinicipal value
will  change  less than  that of the  index.  We  emphasize,  however,  that our
absolute performance will be hurt if rates continue to rise.

         The fund maintained its traditional allocation,  with 60%-65% of assets
invested  in  investment-grade  bonds and 35%-40%  invested  in  dividend-paying
equities.  As  events  in 1999  proved,  Wellesley's  performance  generally  is
extremely   sensitive  to  the  direction  of  long-term  interest  rates.  This
sensitivity is due to the long average  maturity of the fund's bond holdings and
to our meaningful commitment to high-yielding, interest-rate-sensitive stocks.

THE OUTLOOK FOR THE FIRST HALF OF 2000

The economy remains on solid footing,  supported by strong gains in consumption,
accelerating exports, and continued strength in business investment,  especially
in  technology  products.  Inflation-adjusted  GDP (gross  domestic  product) is
expected to grow more slowly than it did in 1999, when the growth rate was about
4%. The outlook for  consumer  spending  remains very  positive  because of good
fundamentals:  Steady job growth,  rising incomes, and increasing wealth are all
fueling the best spending gains in nearly 15 years. Confidence is at high levels
last seen in the late 1960s.  There are concerns about whether the good news can
continue  and  whether  the high  level of  consumer  spending  is  sustainable.
However,  even though  consumer  debt levels are high, we do not foresee a sharp
slowdown in consumption.
- --------------------------------------------------------------------------------
INVESTMENT PHILOSOPHY

The fund  reflects a belief that  relatively  high  current  income and moderate
long-term  growth in income and capital can be  achieved  without  undue risk by
holding  60% to 65% of assets in  fixed-income  securities  and the  balance  in
income-oriented  common stocks.  Consistent with this approach,  the fund's bond
segment  comprises  intermediate-  and long-term  U.S.  Treasury  securities and
high-quality  corporate  bonds;  its equity  segment is dominated by stocks with
above-average dividend yields and strong potential for dividend increases.
- --------------------------------------------------------------------------------

                                       9
<PAGE>

         We expect the federal funds rate--the short-term interest rate directly
controlled by the Federal Reserve Board--to  increase several times by mid-year.
This  tightening  by the Fed will keep the bond  market--and  possibly the stock
market--off-balance.

         Operating  profits  for S&P 500 Index  companies  grew 21% in the third
quarter of 1999 from  year-earlier  levels--the  best quarterly gain since 1995.
For 1999 as a whole,  operating  earnings,  when  reports  are in, will be up by
nearly 13%. The underpinnings for sustained,  strong profit advances in 2000 are
solid: robust U.S. demand, accelerating export business, rebounding sales abroad
for U.S.  multinationals,  only  modest  labor cost  increases,  and  aggressive
technology-induced  cost-cutting.  We expect  earnings to rise about 13% for S&P
500  companies  this year and believe that any surprises are likely to be on the
higher end. This is a more optimistic  view than the consensus,  which calls for
profit  growth  of 7% to 8%. We  expect  analysts  to  steadily  raise  earnings
forecasts in 2000.

OUR STRATEGY IN 2000

Our strategy for the fund is  consistent  with prior  periods.  Because we see a
more positive outlook for stocks than for bonds, we have raised the fund's stock
allocation to its maximum of 40% of assets. The increase in our stock allocation
from 36% at the  beginning of 1999 to 40% now is a substantial  move,  given our
allocation  guideline of 35% to 40%. We will continue to shorten the duration of
the fund's bond portfolio to reduce its  vulnerability  to rising interest rates
and its overall volatility. We emphasize bonds with call protection to provide a
consistent    income    stream.     We    purchase    only     investment-grade,
U.S.-dollar-denominated  bonds,  and we  emphasize  those  issues with stable or
improving credit fundamentals.

         In selecting stocks, we continue to purchase shares with  above-average
dividend yields from companies  representing a diversified  group of industries.
When we sell stocks,  it is usually  because  their prices have  approached  our
target prices or because a company is experiencing deteriorating fundamentals.

         Most of Wellesley's  stocks are New York Stock  Exchange-listed  issues
and most have above-average  yields. The average dividend yield on our stocks is
3.7%, which is 236% higher than the current,  historically low 1.1% yield on the
S&P 500 Index.

         The  dominant  factor  guiding  the fund's  investment  strategy is our
ongoing  obligation to shareholders to provide an attractive  level of income by
investing in high-quality securities. Our long-term goal is to achieve increases
in Wellesley's  dividend by purchasing  stocks of strong  companies  expected to
provide higher dividends  generated from rising  earnings.  We avoid stocks with
ultra-high dividends, which may not be sustainable over the longer term.

SUMMARY

We are disappointed by the absolute and relative performance of Wellesley Income
Fund during 1999,  especially  given that the stock market averages were setting
new highs.  We will  continue to focus on  fulfilling  the fund's  objective--to
produce  relatively high and sustainable  current income and long-term growth in
income and capital.  We'll  maintain a tight range for  allocations to bonds and
stocks, and we'll continue to buy high-quality securities.

Earl E. McEvoy, Senior Vice President
John R. Ryan, Senior Vice President
Wellington Management Company, LLP

January 14, 2000

                                       10
<PAGE>

PERFORMANCE SUMMARY
WELLESLEY INCOME FUND

All of the data on this page represent past performance, which cannot be used to
predict  future returns that may be achieved by the fund.  Note,  too, that both
share  price and  return  can  fluctuate  widely.  An  investor's  shares,  when
redeemed, could be worth more or less than their original cost.

TOTAL INVESTMENT RETURNS: DECEMBER 31, 1979-DECEMBER 31, 1999
- --------------------------------------------------------------------------------
                           WELLESLEY INCOME FUND                 COMPOSITE*
FISCAL        CAPITAL          INCOME              TOTAL           TOTAL
YEAR          RETURN           RETURN             RETURN          RETURN
- --------------------------------------------------------------------------------
1980            0.9%             11.0%              11.9%           9.4%
1981           -3.1              11.8                8.7           -1.7
1982           10.1              13.2               23.3           36.3
1983            7.1              11.5               18.6           13.2
1984            4.9              11.7               16.6           13.8
1985           16.0              11.4               27.4           29.4
1986            9.2               9.1               18.3           19.9
1987           -8.1               6.2               -1.9            2.5
1988            4.7               8.9               13.6           13.7
1989           11.8               9.1               20.9           21.0
1990           -4.3               8.1                3.8            2.5
1991           12.9               8.7               21.6           20.5
1992            1.6               7.1                8.7            9.2
1993            8.2               6.4               14.6           14.6
1994          -10.2               5.8               -4.4           -4.6
1995           21.6               7.3               28.9           30.7
1996            3.3               6.1                9.4            6.8
1997           13.8               6.4               20.2           19.4
1998            6.4               5.4               11.8           13.9
1999           -9.2               5.1               -4.1           -1.4
- --------------------------------------------------------------------------------
*65%  Lehman  Long-Term  Corporate  Bond  Index  and 35% S&P 500  Index  through
 December  31,  1985;  65% Lehman  Long  Corporate  AA or Better  Index, 26% S&P
 500/BARRA Value Index, and 9% S&P Utilities Index through  June 30, 1996,  when
 the S&P Utilities  component was separated into the S&P Utilities Index and the
 S&P Telephone Index.
See  Financial  Highlights  table  on page 23 for  dividend  and  capital  gains
 information for the past five years.

CUMULATIVE PERFORMANCE: DECEMBER 31, 1989-DECEMBER 31, 1999
- --------------------------------------------------------------------------------
         198912         10000         10000         10000         10000
         199003          9797          9761          9724          9787
         199006         10065         10047         10055         10196
         199009          9689          9429          9604         10100
         199012         10376          9853         10248         10692
         199103         10927         10765         10884         11143
         199106         11039         10836         10949         11285
         199109         11797         11568         11669         12107
         199112         12613         12114         12351         12853
         199203         12181         12279         12120         12625
         199206         12828         12562         12685         13171
         199209         13543         13004         13239         13825
         199212         13708         13177         13487         13968
         199303         14644         14075         14396         14693
         199306         15091         14398         14864         15213
         199309         15854         14684         15587         15890
         199312         15716         14780         15454         15778
         199403         15014         14553         14750         15054
         199406         14961         14521         14556         14692
         199409         15079         14645         14655         14682
         199412         15018         14349         14749         14870
         199503         16095         15443         15862         15876
         199506         17463         16336         17246         17289
         199509         18201         16898         18063         17733
         199512         19360         17457         19273         18841
         199603         19121         18294         18922         17969
         199606         19316         18649         19138         18012
         199609         19875         18740         19409         18342
         199612         21184         19464         20584         19113
         199703         21056         19887         20367         18681
         199706         22564         21528         21994         19668
         199709         24232         22415         23342         20685
         199712         25461         22652         24580         21698
         199803         26639         24306         25812         22009
         199806         27152         24532         26401         22819
         199809         27599         23070         26335         23721
         199812         28476         24458         27988         23980
         199903         27733         24909         27417         23254
         199906         28410         25896         28018         22539
         199909         27530         24839         27176         22469
         199912         27299         25673         27596         22295





                            AVERAGE ANNUAL TOTAL RETURNS
                           PERIODS ENDED DECEMBER 31, 1999
                           -------------------------------      FINAL VALUE OF A
                               1 YEAR   5 YEARS  10 YEARS     $10,000 INVESTMENT
- --------------------------------------------------------------------------------
Wellesley Income Fund          -4.14%   12.69%  10.56%             $27,299
Average Income Fund*            4.97    12.34    9.89               25,673
Wellesley Composite Index**    -1.40    13.35   10.68               27,596
Lehman Long Corporate AA or
 Better Index                  -7.00    8.44     8.35               22,295
- --------------------------------------------------------------------------------
 *Derived from data provided by Lipper Inc.
**65% Lehman Long Corporate AA or Better Index,  26% S&P 500/BARRA  Value Index,
  and  9% S&P  Utilities  Index  through   June   30,   1996     when    the S&P
  Utilities  component  was  separated  into  the S&P  Utilities  Index and  the
  S&P  Telephone Index.

<TABLE>
<CAPTION>
AVERAGE ANNUAL TOTAL RETURNS: PERIODS ENDED DECEMBER 31, 1999
- ------------------------------------------------------------------------------------------
                                                                       10 YEARS
                           INCEPTION                          ----------------------------
                             DATE       1 YEAR    5 YEARS     CAPITAL    INCOME     TOTAL
- ------------------------------------------------------------------------------------------
<S>                           <C>       <C>         <C>        <C>        <C>       <C>
Wellesley Income Fund      7/1/1970     -4.14%    12.69%      3.95%      6.61%      10.56%
- ------------------------------------------------------------------------------------------
</TABLE>

                                       11
<PAGE>

FUND PROFILE
WELLESLEY INCOME FUND

This Profile  provides a snapshot of the fund's  characteristics  as of December
31, 1999, compared where appropriate to an unmanaged index. Key elements of this
Profile are defined on pages 14-15.

TOTAL FUND CHARACTERISTICS
- --------------------------
Yield             5.7%
Turnover Rate      20%
Expense Ratio    0.30%
Cash Reserves     1.2%


FUND ASSET ALLOCATION
- --------------------------
STOCKS             40
BONDS              59
CASH RESERVES       1

TOTAL FUND VOLATILITY MEASURES
- ---------------------------------------
                WELLESLEY     S&P 500
- ---------------------------------------
R-Squared            0.46        1.00
Beta                 0.29        1.00


TEN LARGEST STOCKS
(% OF EQUITIES)
- ---------------------------------------
Exxon Mobil Corp.                  5.1%
Ford Motor Co.                     4.5
National City Corp.                3.3
Bell Atlantic Corp.                3.3
Atlantic Richfield Co.             3.2
Shell Transport & Trading Co. ADR  3.1
Wachovia Corp.                     2.9
Pharmacia & Upjohn, Inc.           2.9
USX-Marathon Group                 2.9
Equitable Resources, Inc.          2.8
- ---------------------------------------
Top Ten                           34.0%
- ---------------------------------------
Top Ten as % of Total Net Assets  13.7%

SECTOR DIVERSIFICATION (% OF COMMON STOCKS)
- -----------------------------------------------------------------------
                       DECEMBER 31, 1998         DECEMBER 31, 1999
                       ------------------------------------------------
                          WELLESLEY           WELLESLEY      S&P 500
                       ------------------------------------------------
Auto & Transportation         4.0%               6.6%          1.9%
Consumer Discretionary        6.1                5.3          13.9
Consumer Staples              5.0                4.7           6.3
Financial Services           20.5               17.3          13.8
Health Care                   5.7                5.6           9.3
Integrated Oils              17.0               18.0           4.8
Other Energy                  0.0                4.0           1.3
Materials & Processing        7.4               10.3           3.2
Producer Durables             0.0                0.0           3.6
Technology                    0.0                0.0          25.4
Utilities                    31.5               21.7          10.2
Other                         2.8                6.5           6.3
- -----------------------------------------------------------------------
                                       12
<PAGE>

EQUITY CHARACTERISTICS
- ----------------------------------------------
                       WELLESLEY       S&P 500
- ----------------------------------------------
Number of Stocks              69           500
Median Market Cap         $15.8B        $86.7B
Price/Earnings Ratio       17.0x         29.8x
Price/Book Ratio            2.4x          5.5x
Dividend Yield              3.7%          1.1%
Return on Equity           17.2%         23.4%
Earnings Growth Rate        5.4%         16.6%
Foreign Holdings            7.7%          1.3%


EQUITY INVESTMENT FOCUS
- --------------------------------
[grid]
STYLE          VALUE
MARKET CAP     LARGE


FIXED-INCOME CHARACTERISTICS
- ----------------------------------------------
                       WELLESLEY       LEHMAN*
- ----------------------------------------------
Number of Bonds              164         5,545
Yield to Maturity           7.6%          7.2%
Average Coupon              6.9%          6.8%
Average Maturity      15.8 years     8.9 years
Average Quality              Aa3           Aaa
Average Duration       7.6 years     4.9 years

*Lehman Aggregate Bond Index.


FIXED-INCOME INVESTMENT FOCUS
- ---------------------------------------------------
[grid]
AVERAGE MATURITY         LONG
CREDIT QUALITY           INVESTMENT-GRADE CORPORATE


DISTRIBUTION BY ISSUER
(% OF BONDS)
- ---------------------------------
Asset-Backed                 0.0%
Finance                     25.0
Foreign                      0.7
Industrial                  35.5
Mortgage                    15.1
Treasury/Agency              8.3
Utilities                   15.4
- ---------------------------------
Total                      100.0%


DISTRIBUTION BY CREDIT QUALITY
(% OF BONDS)
- ---------------------------------
Treasury/Agency              8.3%
Aaa                         17.9
Aa                          19.7
A                           40.6
Baa                         13.0
Ba                           0.5
B                            0.0
Not Rated                    0.0
- ---------------------------------
Total                      100.0%

                                       13
<PAGE>


AVERAGE COUPON. The average interest rate paid on the securities held by a fund.
It is expressed as a percentage  of face value.

AVERAGE  DURATION.  An  estimate  ofhow  much a bond  fund's  share  price  will
fluctuate in response to a change in interest  rates. To see how the price could
shift,  multiply the fund's  duration by the change in rates.  If interest rates
rise by one percentage point, the share price of a fund with an average duration
of five years  would  decline  by about 5%. If rates  decrease  by a  percentage
point, the fund's share price would rise by 5%.

AVERAGE  MATURITY.  The average  length of time until bonds held by a fund reach
maturity  (or are  called) and are  repaid.  In general,  the longer the average
maturity, the more a fund's share price will fluctuate in response to changes in
market interest rates.

AVERAGE QUALITY.  An indicator of credit risk, this figure is the average of the
ratings assigned to a fund's securities holdings by credit-rating  agencies. The
agencies make their  judgment after  appraising an issuer's  ability to meet its
obligations.  Quality is graded on a scale,  with Aaa or AAA indicating the most
creditworthy  bond  issuers and A-1 or MIG-1  indicating  the most  creditworthy
issuers of money market securities.  U.S. Treasury  securities are considered to
have the highest credit quality.

BETA. A measure of the magnitude of a fund's past  share-price  fluctuations  in
relation  to the ups and downs of the  overall  market  (or  appropriate  market
index).  The market (or index) is assigned a beta of 1.00, so a fund with a beta
of 1.20  would have seen its share  price  rise or fall by 12% when the  overall
market rose or fell by 10%.

CASH  RESERVES.  The  percentage  of a  fund's  net  assets  invested  in  "cash
equivalents"--highly  liquid,  short-term,   interest-bearing  securities.  This
figure does not include cash invested in futures  contracts to simulate stock or
bond investment.

DISTRIBUTION BY CREDIT QUALITY.  This breakdown of a fund's securities by credit
rating can help in gauging the risk that  returns  could be affected by defaults
or other credit problems.

DISTRIBUTION  BY ISSUER.  A breakdown of a fund's  holdings by type of issuer or
type of instrument.

DIVIDEND  YIELD.  The current,  annualized  rate of dividends paid on a share of
stock,  divided by its current  share price.  For a fund,  the weighted  average
yield for stocks it holds.

EARNINGS  GROWTH RATE.  The average  annual rate of growth in earnings  over the
past five years for the stocks now in a fund.

EQUITY  INVESTMENT  FOCUS.  This grid  indicates  the  focus of a fund's  equity
holdings in terms of two attributes:  market capitalization  (large,  medium, or
small) and relative valuation (growth, value, or a blend).

EXPENSE  RATIO.  The  percentage of a fund's  average net assets used to pay its
annual  administrative  and advisory  expenses.  These expenses  directly reduce
returns to investors.

FIXED-INCOME  INVESTMENT  FOCUS.  This  grid  indicates  the  focus  of a fund's
fixed-income  holdings  in terms of two  attributes:  average  maturity  (short,
medium, or long) and average credit quality  (Treasury/agency,  investment-grade
corporate, or below investment-grade).

FOREIGN HOLDINGS. The percentage of a fund's equity assets represented by stocks
or American Depositary Receipts of companies based outside the United States.

FUND ASSET  ALLOCATION.  This chart shows the  proportions of a fund's  holdings
allocated to different types of assets.

MEDIAN  MARKET  CAP.  An  indicator  of the  size of  companies  in which a fund
invests;  the  midpoint  of  market   capitalization   (market  price  x  shares
outstanding) of a fund's stocks, weighted by the

                                       14
<PAGE>

proportion of the fund's assets invested in each stock. Stocks representing half
of the fund's assets have market  capitalizations above the median, and the rest
are below it.

NUMBER OF BONDS.  An indicator of  diversification.  The more separate  issues a
fund holds,  the less  susceptible  it is to a price  decline  stemming from the
problems of a particular bond issuer.

NUMBER OF STOCKS. An indicator of diversification. The more stocks a fund holds,
the more  diversified  it is and the more  likely  to  perform  in line with the
overall stock market.

PRICE/BOOK  RATIO.  The share price of a stock divided by its net worth, or book
value,  per share.  For a fund,  the weighted  average  price/book  ratio of the
stocks it holds.

PRICE/EARNINGS  RATIO.  The ratio of a stock's  current  price to its  per-share
earnings over the past year. For a fund, the weighted  average P/E of the stocks
it holds. P/E is an indicator of market expectations about corporate  prospects;
the higher the P/E, the greater the expectations for a company's future growth.

R-SQUARED.  A measure of how much of a fund's past  returns can be  explained by
the returns from the overall market (or its benchmark  index). If a fund's total
return  were  precisely  synchronized  with the  overall  market's  return,  its
R-squared  would  be 1.00.  If a  fund's  returns  bore no  relationship  to the
market's returns, its R-squared would be 0.

RETURN ON  EQUITY.  The annual  average  rate of return  generated  by a company
during the past five years for each dollar of  shareholder's  equity (net income
divided by  shareholder's  equity).  For a fund, the weighted  average return on
equity for the  companies  whose stocks it holds.

SECTOR DIVERSIFICATION. The percentages of a fund's common stocks that come from
each of the major industry groups that compose the stock market.

TEN LARGEST STOCKS.  The percentage of equity assets that a fund has invested in
its ten largest stocks. As this percentage rises, a fund's returns are likely to
be more  volatile  because  they are more  dependent  on the  fortunes  of a few
companies.

TURNOVER  RATE. An indication of trading  activity  during the past year.  Funds
with high turnover rates incur higher  transaction  costs and are more likely to
distribute capital gains (which are taxable to investors).

YIELD.  A snapshot of a fund's  income from interest and  dividends.  The yield,
expressed  as a  percentage  of the fund's net asset  value,  is based on income
earned over the past 30 days and is  annualized,  or  projected  forward for the
coming year.

YIELD  TO  MATURITY.  The  rate of  return  an  investor  would  receive  if the
securities held by a fund were held to their maturity dates.

                                       15

<PAGE>

FINANCIAL STATEMENTS
DECEMBER 31, 1999

STATEMENT OF NET ASSETS

This Statement  provides a detailed list of the fund's holdings,  including each
security's market value on the last day of the reporting period.  Securities are
grouped  and  subtotaled  by asset  type  (common  stocks,  bonds,  etc.) and by
industry sector. Other assets are added to, and liabilities are subtracted from,
the value of Total Investments to calculate the fund's Net Assets.  Finally, Net
Assets are divided by the outstanding  shares of the fund to arrive at its share
price, or Net Asset Value (NAV) Per Share.

         At the  end of the  Statement  of Net  Assets,  you  will  find a table
displaying  the  composition  of the  fund's  net  assets  on both a dollar  and
per-share  basis.  Because all income and any realized gains must be distributed
to  shareholders  each year, the bulk of net assets  consists of Paid in Capital
(money  invested by  shareholders).  The  amounts  shown for  Undistributed  Net
Investment  Income and  Accumulated  Net Realized Gains usually  approximate the
sums the fund had available to distribute to shareholders as income dividends or
capital  gains  as  of  the  statement  date  but  may  differ  because  certain
investments or transactions may be treated differently for financial  statements
and tax purposes. Any Accumulated Net Realized Losses, and any cumulative excess
of distributions  over net income or net realized gains, will appear as negative
balances.  Unrealized Appreciation  (Depreciation) is the difference between the
market value of the fund's  investments  and their cost,  and reflects the gains
(losses) that would be realized if the fund were to sell all of its  investments
at their statement-date values.
- -------------------------------------------------------------
                                                FACE   MARKET
                                              AMOUNT   VALUE*
WELLESLEY INCOME FUND                          (000)    (000)
- -------------------------------------------------------------
CORPORATE BONDS (44.5%)
- -------------------------------------------------------------
FINANCE (14.7%)
Allstate Corp.
  6.75%, 5/15/2018                          $ 30,000 $ 26,697
  7.50%, 6/15/2013                            20,000   19,677
American Re Corp.
  7.45%, 12/15/2026                           25,000   23,372
Associates Corp. of North America
  6.25%, 11/1/2008                            25,000   22,984
Bank One Corp.
  7.75%, 7/15/2025                            40,000   38,773
BankBoston Corp.
  6.625%, 12/1/2005                           15,000   14,279
  6.875%, 7/15/2003                           10,000    9,847
Boatmen's Bancshares Inc.
  7.625%, 10/1/2004                           10,000   10,163
CIGNA Corp.
  7.875%, 5/15/2027                           25,000   23,286
Cincinnati Financial Corp.
  6.90%, 5/15/2028                            25,000   21,697
Citicorp
  6.65%, 12/15/2010                           25,000   23,125
  7.125%, 9/1/2005                            15,000   14,821
Citigroup, Inc.
  6.625%, 1/15/2028                           25,000   21,218
CoreStates Capital Corp.
  6.625%, 3/15/2005                           20,000   19,235
Equitable Companies Inc.
  7.00%, 4/1/2028                             25,000   22,354
Farmers Exchange Capital
  7.05%, 7/15/2028                            25,000   20,911
Fifth Third Bancorp
  6.75%, 7/15/2005                            25,000   24,266
First Bank N.A.
  7.55%, 6/15/2004                             8,000    8,072
First Bank System
  6.625%, 5/15/2003                           10,000    9,793
  7.625%, 5/1/2005                             7,500    7,515
First Chicago Corp.
  7.625%, 1/15/2003                           15,000   15,119
First Union Corp.
  6.00%, 10/30/2008                           15,000   13,348
Fleet Financial Group, Inc.
  6.875%, 3/1/2003                            30,000   29,598
General Electric Capital Corp.
  8.125%, 5/15/201                            10,000   10,501
General Electric Capital Services
  7.50%, 8/21/2035                            14,000   13,423
General Electric Global Insurance
Holdings Corp.
  7.00%, 2/15/2026                            60,000   54,710
GMAC
  7.00%, 9/15/2002                            30,000   29,872
John Hancock Mutual Life
  Insurance Co.
  7.375%, 2/15/2024                           50,000   46,207
Liberty Mutual Insurance Co.
  8.50%, 5/15/2025                            35,000   34,128
Lumbermens Mutual Casualty Co.
  9.15%, 7/1/2026                             27,250   26,219
MBIA Inc.
  7.00%, 12/15/2025                           19,500   17,391

                                       16
<PAGE>
- -------------------------------------------------------------
                                                FACE   MARKET
                                              AMOUNT   VALUE*
                                               (000)    (000)
- -------------------------------------------------------------
Massachusetts Mutual Life
  7.50%, 3/1/2024                           $  8,690$   8,101
  7.625%, 11/15/2023                          14,500   13,857
Metropolitan Life Insurance Co.
  7.80%, 11/1/2025                            30,000   29,362
J.P. Morgan & Co., Inc.
  5.75%, 10/15/2008                           20,000   17,572
  6.25%, 1/15/2009                            20,000   18,144
NBD Bank N.A.
  6.25%, 8/15/2003                            20,000   19,296
National City Bank Cleveland
  6.50%, 5/1/2003                             10,000    9,731
National City Bank Pennsylvania
  7.25%, 10/21/2011                           22,000   21,182
National City Corp.
  7.20%, 5/15/2005                            20,000   19,784
NationsBank Corp.
  7.75%, 8/15/2004                            20,000   20,417
Republic New York Corp.
  5.875%, 10/15/2008                          15,000   12,977
SunTrust Banks, Inc.
  6.00%, 2/15/2026                            25,000   23,129
  6.125%, 2/15/2004                           20,000   19,218
Transamerica Financial Corp.
  6.125%, 11/1/2001                           25,000   24,574
Travelers Property Casualty Corp.
  7.75%, 4/15/2026                            25,000   24,249
UNUM Corp.
  6.75%, 12/15/2028                           25,000   20,440
Wachovia Corp.
  6.375%, 4/15/2003                           20,000   19,574
  6.605%, 10/1/2025                           30,000   28,891
                                                    ---------
                                                    1,023,099
                                                    ---------
INDUSTRIAL (20.8%)
AirTouch Communications, Inc.
  6.35%, 6/1/2005                             25,000   23,732
Aluminum Co. of America
  6.75%, 1/15/2028                            25,000   21,664
Baxter International, Inc.
  7.65%, 2/1/2027                             25,000   24,050
Bestfoods
  6.625%, 4/15/2028                           25,000   21,933
Bristol-Myers Squibb Co.
  6.80%, 11/15/2026                           25,000   23,137
Burlington Northern Santa Fe Corp.
  6.375%, 12/15/2005                          12,500   11,807
  6.875%, 12/1/2027                           25,000   22,116
CPC International, Inc.
  7.25%, 12/15/2026                           25,000   23,744
CSX Corp.
  7.95%, 5/1/2027                             25,000   24,682
Caterpillar Inc.
  6.625%, 7/15/2028                           25,000   21,546
Champion International Corp.
  7.35%, 11/1/2025                            30,000   27,057
Chrysler Corp.
  7.45%, 3/1/2027                             25,000   24,277
Coca Cola Enterprises
  5.75%, 11/1/2008                            25,000   22,323
Comcast Cable Communications
  6.20%, 11/15/2008                           25,000   22,629
Conoco Inc.
  6.35%, 4/15/2009                            25,000   23,124
The Walt Disney Co.
  6.75%, 3/30/2006                            15,000   14,631
E.I. du Pont de Nemours & Co.
  6.50%, 1/15/2028                            25,000   21,766
  6.75%, 9/1/2007                             25,000   24,181
Eaton Corp.
  6.50%, 6/1/2025                             10,000    9,495
Ferro Corp.
  7.125%, 4/1/2028                            10,000    8,276
Ford Motor Co.
  7.50%, 8/1/2026                             20,000   19,256
  8.90%, 1/15/2032                            20,000   22,283
General Motors Corp.
  7.40%, 9/1/2025                             30,000   28,596
  9.40%, 7/15/2021                            20,000   23,163
Georgia-Pacific Group
  7.25%, 6/1/2028                             25,000   22,411
Gillette Co.
  5.75%, 10/15/2005                           35,000   32,624
  6.25%, 8/15/2003                            10,000    9,762


Hershey Foods Corp.
  6.95%, 3/1/2007                             13,000   12,717
Hubbell Inc.
  6.625%, 10/1/2005                           10,000    9,680
Illinois Tool Works, Inc.
  5.75%, 3/1/2009                             25,000   22,405
International Business
Machines Corp.
  7.00%, 10/30/2025                           35,000   32,843
International Paper Co.
  7.625%, 1/15/2007                           15,000   14,904
Johnson & Johnson
  6.73%, 11/15/2023                           15,000   13,826
Kimberly-Clark Corp.
  6.25%, 7/15/2018                            25,000   22,024
Eli Lilly & Co.
  7.125%, 6/1/2025                            25,000   23,847
Lockheed Corp.
  6.75%, 3/15/2003                             7,000    6,765
Masco Corp.
  6.625%, 4/15/2018                           20,000   17,721
Mead Corp.
  7.35%, 3/1/2017                             10,350    9,632
Merck & Co.
  6.30%, 1/1/2026                             25,000   21,758
Minnesota Mining &
  Manufacturing Corp.
  6.375%, 2/15/2028                           35,000   30,430
Mobil Corp.
  8.625%, 8/15/2021                           20,000   22,284
Monsanto Co.
  6.75%, 12/15/2027                           20,000   17,274
Motorola, Inc.
  7.50%, 5/15/2025                            25,000   24,323
New York Times Co.
  8.25%, 3/15/2025                            26,000   25,723
News America Holdings Inc.
  8.00%, 10/17/2016                           40,000   39,113

                                       17
<PAGE>
- -------------------------------------------------------------
                                                FACE   MARKET
                                              AMOUNT   VALUE*
WELLESLEY INCOME FUND                          (000)    (000)
- -------------------------------------------------------------
Norfolk Southern Corp.
  7.80%, 5/15/2027                          $ 25,000$  24,433
PPG Industries, Inc.
  6.875%, 2/15/2012                           10,200    9,548
  9.00%, 5/1/2021                             15,000   16,779
Phelps Dodge Corp.
  7.125%, 11/1/2027                           12,500   10,624
Praxair, Inc.
  6.75%, 3/1/2003                             25,000   24,446
Procter & Gamble Co.
  5.25%, 9/15/2003                            15,000   14,173
  6.45%, 1/15/2026                            25,000   22,029
Procter & Gamble Co. ESOP
  9.36%, 1/1/2021                             30,000   34,474
Raytheon Co.
  7.20%, 8/15/2027                            25,000   22,294
Rohm & Haas Co.
  7.85%, 7/15/2029                            25,000   25,044
E.W. Scripps Co.
  6.625%, 10/15/2007                          20,000   18,874
Joseph Seagram & Sons, Inc.
  7.50%, 12/15/2018                           20,000   18,894
Tenneco Packaging Inc.
  8.125%, 6/15/2017                           30,000   27,982
  8.375%, 4/15/2027                           20,000   18,754
Texaco Capital
  8.625%, 4/1/2032                            25,000   27,275
Time Warner Inc.
  6.625%, 5/15/2029                           25,000   21,267
Tribune Co.
  6.875%, 11/1/2006                           20,000   19,293
USX Corp.
  6.85%, 3/1/2008                             25,000   23,520
USA Waste Services Inc.
  7.00%, 7/15/2028                            25,000   18,425
Ultramar Diamond Shamrock
  7.20%, 10/15/2017                           25,000   22,159
Vulcan Materials Co.
  6.00%, 4/1/2009                             25,000   22,384
Washington Post Co.
  5.50%, 2/15/2009                            50,000   44,039
Weyerhaeuser Co.
  8.50%, 1/15/2025                            10,000   10,600
Whirlpool Corp.
  9.00%, 3/1/2003                             10,000   10,357
                                                    ---------
                                                    1,449,201
                                                    ---------
UTILITIES (9.0%)
AT&T Corp.
  6.50%, 3/15/2029                            50,000   42,884
Alabama Power Co.
  5.49%, 11/1/2005                             8,250    7,520
Arizona Public Service Co.
  6.625%, 3/1/2004                            10,000    9,729
Baltimore Gas & Electric Co.
  7.25%, 7/1/2002                             15,000   15,075
BellSouth Telecommunications
  6.25%, 5/15/2003                            12,000   11,724
Chesapeake & Potomac Telephone
  Co. (VA)
  7.875%, 1/15/2022                           16,000   16,051
Consolidated Edison Co. of
New York, Inc.
  6.375%, 4/1/2003                            20,000   19,579
Duke Energy Corp.
  6.00%, 12/1/2028                            25,000   19,922
El Paso Natural Gas Co.
  7.50%, 11/15/2026                           25,000   22,872
Enron Corp.
  6.875%, 10/15/2007                          20,000   18,939
Florida Power Corp.
  6.75%, 2/1/2028                             22,380   19,730
GTE California Inc.
  6.70%, 9/1/2009                             25,000   23,715
GTE Southwest, Inc.
  6.00%, 1/15/2006                            10,000    9,258
Illinois Power Co.
  6.50%, 8/1/2003                             10,000    9,679
Indiana Bell Telephone Co., Inc.
  7.30%, 8/15/2026                            30,000   28,279
Kentucky Utilities Co.
  7.92%, 5/15/2007                             5,000    5,076
MCI Communications Corp.
  7.50%, 8/20/2004                            15,000   15,186


Michigan Bell Telephone Co.
  7.85%, 1/15/2022                            25,000   24,885
New Jersey Bell Telephone Co.
  8.00%, 6/1/2022                             40,000   41,076
New York Telephone Co.
  6.50%, 3/1/2005                             30,000   28,924
Northern States Power Co.
  6.375%, 4/1/2003                             8,000    7,800
  7.125%, 7/1/2025                            30,000   27,884
Ohio Bell Telephone Co.
  6.125%, 5/15/2003                           15,000   14,532
Oklahoma Gas & Electric Co.
  6.50%, 4/15/2028                            12,770   10,520
Pacific Bell
  7.125%, 3/15/2026                           25,000   23,270
PacifiCorp
  6.625%, 6/1/2007                            10,000   9,539
Pennsylvania Power & Light Co.
  6.50%, 4/1/2005                             15,000   14,298
PECO Energy
  6.50%, 5/1/2003                             30,000   29,252
Southwestern Public Service Co.
  7.25%, 7/15/2004                            10,000   9,883
Sprint Capital Corp.
  6.875%, 11/15/2028                          20,000   17,795
Tennessee Gas Pipeline Co.
  7.50%, 4/1/2017                             25,000   23,850
Texas Utilities Electric Co.
  6.75%, 7/1/2005                             10,000   9,645
Union Electric Co.
  6.875%, 8/1/2004                            10,000   9,852
Wisconsin Electric Power Co.
  6.50%, 6/1/2028                             25,000   21,320
Wisconsin Power & Light
  5.70%, 10/15/2008                           12,650   11,170
                                                    ---------
                                                      630,713
                                                    ---------
- -------------------------------------------------------------
TOTAL CORPORATE BONDS
(Cost $3,307,895)                                   3,103,013
- -------------------------------------------------------------

                                       18
<PAGE>
- -------------------------------------------------------------
                                                FACE   MARKET
                                              AMOUNT   VALUE*
                                               (000)    (000)
- -------------------------------------------------------------
FOREIGN BONDS (U.S. DOLLAR-DENOMINATED)(0.4%)
- -------------------------------------------------------------
Province of Manitoba
  6.125%, 1/19/2004                         $  7,000$   6,794
Province of Ontario
  6.00%, 2/21/2006                            25,000   23,562
- -------------------------------------------------------------
TOTAL FOREIGN BONDS
(Cost $31,815)                                         30,356
- -------------------------------------------------------------
U.S. GOVERNMENT AND AGENCY OBLIGATIONS (13.7%)
- -------------------------------------------------------------
U.S. GOVERNMENT SECURITIES (2.8%)
U.S. Treasury Bond
  5.50%, 8/15/2028                            25,000   21,332
U.S. Treasury Note
  6.25%, 8/31/2002                            50,000   49,942
  6.875%, 5/15/2006                          125,000  127,093
                                                    ---------
                                                      198,367
                                                    ---------
AGENCY BONDS & NOTES (2.1%)
Federal Home Loan Bank
  5.125%, 9/15/2003                           50,000   47,240
Federal Home Loan Mortgage Corp.
  5.75%, 7/15/2003                            50,000   48,348
Federal National Mortgage Assn.
  5.75%, 6/15/2005                            50,000   47,439
                                                    ---------
                                                      143,027
                                                    ---------
Mortgage Obligations (8.8%)
Federal National Mortgage Assn.
(1)5.735%, 1/01/2009                          14,843   13,338
Government National
  Mortgage Assn.
(1)6.00%, 6/15/2028-3/15/2029                437,803  399,302
(1)6.50%, 2/15/2026-8/15/2029                217,496  204,612
                                                    ---------
                                                      617,252
                                                    ---------
- -------------------------------------------------------------
TOTAL U.S. GOVERNMENT AND AGENCY OBLIGATIONS
(COST $1,025,913)                                     958,646
- -------------------------------------------------------------
                                              SHARES
- -------------------------------------------------------------
COMMON STOCKS (40.2%)
- -------------------------------------------------------------
AUTO & TRANSPORTATION (2.6%)
         CSX Corp.                           285,600    8,961
         Ford Motor Co.                    2,350,500  125,605
         General Motors Corp.                500,000   36,344
         Norfolk Southern Corp.              655,000   13,428
                                                    ---------
                                                      184,338
                                                    ---------
CONSUMER DISCRETIONARY (2.1%)
         Eastman Kodak Co.                   916,000   60,685
         May Department Stores Co.         1,695,000   54,664
         J.C. Penney Co., Inc.               820,300   16,355
         The Stanley Works                   600,000   18,075
                                                    ---------
                                                      149,779
                                                    ---------
CONSUMER STAPLES (1.9%)
         Flowers Industries, Inc.          2,718,300   43,323
         H.J. Heinz Co.                    1,000,800   39,844
         Philip Morris Cos., Inc.          1,645,000   38,143
         Universal Corp.                     400,000    9,125
                                                    ---------
                                                      130,435
                                                    ---------
FINANCIAL SERVICES (7.0%)
         American General Corp.              400,000   30,350
         Bank of America Corp.               201,064   10,091
         Brandywine Realty Trust REIT        484,500    7,934
         CBL & Associates Properties,
          Inc. REIT                          555,100   11,449
         Colonial Properties Trust REIT      204,900    4,751
         FelCor Lodging Trust, Inc. REIT     630,000   11,025
         First Union Corp.                   400,000   13,125
         General Growth Properties
          Inc. REIT                          882,300   24,704
         HSB Group Inc.                      233,300    7,888
         IPC Holdings Ltd.                   655,300    9,748
         Kimco Realty Corp. REIT             258,700    8,763
         The Macerich Co. REIT               619,100   12,885
         Marsh & McLennan Cos., Inc.         785,000   75,115
         National City Corp.               3,940,200   93,333
         Nationwide Health Properties,
          Inc. REIT                          680,000    9,350
         St. Paul Cos., Inc.                 300,000   10,106
         Sun Communities, Inc. REIT          685,600   22,068
         U.S. Bancorp                        900,000   21,431
         Urban Shopping Centers,
          Inc. REIT                          682,000   18,499
         Wachovia Corp.                    1,206,900   82,069
                                                    ---------
                                                      484,684
                                                    ---------
HEALTH CARE (2.3%)
         Baxter International, Inc.        1,197,700   75,231
         Pharmacia & Upjohn, Inc.          1,808,500   81,383
                                                    ---------
                                                      156,614
                                                    ---------
INTEGRATED OILS (7.2%)
         Atlantic Richfield Co.            1,036,000   89,614
         BP Amoco PLC ADR                    926,204   54,935
         Exxon Mobil Corp.                 1,779,463  143,358
         Royal Dutch Petroleum Co. ADR     1,263,000   76,333
         Texaco Inc.                       1,070,000   58,114
         USX-Marathon Group                3,266,100   80,632
                                                    ---------
                                                      502,986
                                                    ---------
OTHER ENERGY (1.6%)
         Ashland, Inc.                     1,030,000   33,926
      (2)Equitable Resources, Inc.         2,352,100   78,501
                                                    ---------
                                                      112,427
                                                    ---------
MATERIALS & PROCESSING (4.1%)
         Air Products & Chemicals, Inc.      800,000   26,850
         CK Witco Corp.                      212,858    2,847
         Consolidated Papers                 403,200   12,827
         Eastman Chemical Co.              1,383,400   65,971
         The Timber Co.                    2,277,000   56,071
         Westvaco Corp.                    1,414,400   46,145
         Weyerhaeuser Co.                  1,064,000   76,409
                                                    ---------
                                                      287,120
                                                    ---------
UTILITIES (8.7%)
         AT&T Corp.                        1,347,500   68,386
         Bell Atlantic Corp.               1,500,000   92,344
         Central & South West Corp.        2,232,300   44,646
         Consolidated Edison Inc.            947,400   32,685
         Constellation Energy Group          850,000   24,650
         DQE Inc.                          2,051,650   71,038
         DTE Energy Co.                    1,238,200   38,849
         Duke Energy Corp.                   300,000   15,037
         GPU, Inc.                         1,208,600   36,182
         MCN Energy Group Inc.               501,100   11,901

                                       19
<PAGE>
- -------------------------------------------------------------
                                                       MARKET
                                                       VALUE*
WELLESLEY INCOME FUND                         SHARES    (000)
- -------------------------------------------------------------
         National Fuel Gas Co.               182,100 $  8,468
         NICOR, Inc.                         722,300   23,475
         PECO Energy Corp.                   810,000   28,148
         Pinnacle West Capital Corp.         760,000   23,228
         Questar Corp.                     2,000,000   30,000
         SCANA Corp.                       1,021,600   27,456
         Southern Co.                      1,340,000   31,490
                                                    ---------
                                                      607,983
                                                    ---------
OTHER (2.7%)
         Cooper Industries, Inc.             995,900   40,272
         Minnesota Mining &
          Manufacturing Co.                  600,000   58,725
         Shell Transport & Trading
          Co. ADR                          1,738,900   85,641
                                                    ---------
                                                      184,638
                                                    ---------
- -------------------------------------------------------------
TOTAL COMMON STOCKS
(Cost $2,368,613)                                   2,801,004
- -------------------------------------------------------------
                                                FACE
                                              AMOUNT
                                               (000)
- -------------------------------------------------------------
TEMPORARY CASH INVESTMENTS (0.9%)
- -------------------------------------------------------------
REPURCHASE AGREEMENTS
Collateralized by U.S. Government
  Obligations in a Pooled
  Cash Account
  3.25%, 1/3/2000                            $60,467   60,467
  3.40%-3.47%, 1/3/2000--Note G                  104      104
- -------------------------------------------------------------
TOTAL TEMPORARY CASH INVESTMENTS
  (Cost $60,571)                                       60,571
- -------------------------------------------------------------
TOTAL INVESTMENTS (99.7%)
  (Cost $6,794,807)                                 6,953,590
- -------------------------------------------------------------
                                                       MARKET
                                                       VALUE*
                                                        (000)
- -------------------------------------------------------------
OTHER ASSETS AND LIABILITIES (0.3%)
- -------------------------------------------------------------
Other Assets--Note C                                $ 112,156
Liabilities--Note G                                   (89,361)
                                                    ---------
                                                       22,795
- -------------------------------------------------------------
NET ASSETS (100%)
- -------------------------------------------------------------
Applicable to 370,015,613 outstanding $.001 par value
  shares of beneficial interest
  (unlimited authorization)                        $6,976,385
=============================================================
NET ASSET VALUE PER SHARE                              $18.85
=============================================================
*See Note A in Notes to Financial Statements.
(1)The  average  maturity  is  shorter  than the  final
   maturity  shown  due to scheduled interim principal
   payments.
(2)Considered an affiliated company as the fund owns more
   than 5% of the outstanding voting securities of such
   company.
ADR--American Depositary Receipt.
REIT--Real Estate Investment Trust.
- -------------------------------------------------------------
AT DECEMBER 31, 1999, NET ASSETS CONSISTED OF:
- -------------------------------------------------------------
                                              AMOUNT      PER
                                               (000)    SHARE
- -------------------------------------------------------------
Paid in Capital                           $6,828,853   $18.45
Overdistributed Net
  Investment Income                           (3,989)    (.01)
Overdistributed Net Realized Gains            (7,262)    (.02)
Unrealized Appreciation--Note F              158,783      .43
- -------------------------------------------------------------
NET ASSETS                                $6,976,385   $18.85
=============================================================
                                       20
<PAGE>

STATEMENT OF OPERATIONS

This Statement  shows dividend and interest income earned by the fund during the
reporting period,  and details the operating expenses charged to the fund. These
expenses  directly  reduce the amount of investment  income  available to pay to
shareholders  as  dividends.  This  Statement  also  shows  any Net Gain  (Loss)
realized  on the  sale of  investments,  and the  increase  or  decrease  in the
Unrealized Appreciation (Depreciation) on investments during the period.
- --------------------------------------------------------------------------------
                                                           WELLESLEY INCOME FUND
                                                    YEAR ENDED DECEMBER 31, 1999
                                                                           (000)
- --------------------------------------------------------------------------------
INVESTMENT INCOME
INCOME
  Dividends*                                                       $    107,386
  Interest                                                              328,795
  Security Lending                                                          264
                                                                   -------------
      Total Income                                                      436,445
                                                                   -------------
EXPENSES
  Investment Advisory Fees--Note B
      Basic Fee                                                           3,763
      Performance Adjustment                                               (196)
  The Vanguard Group--Note C
      Management and Administrative                                      18,640
      Marketing and Distribution                                          1,109
  Custodian Fees                                                             98
  Auditing Fees                                                              11
  Shareholders' Reports                                                     213
  Trustees' Fees and Expenses                                                12
                                                                   -------------
      Total Expenses                                                     23,650
      Expenses Paid Indirectly--Note D                                     (429)
                                                                   -------------
      Net Expenses                                                       23,221
- --------------------------------------------------------------------------------
NET INVESTMENT INCOME                                                   413,224
- --------------------------------------------------------------------------------
REALIZED NET GAIN ON INVESTMENT SECURITIES SOLD*                        370,860
- --------------------------------------------------------------------------------
CHANGE  IN  UNREALIZED  APPRECIATION  (DEPRECIATION)  OF
 INVESTMENT  SECURITIES                                              (1,110,605)
- --------------------------------------------------------------------------------
NET DECREASE IN NET ASSETS  RESULTING  FROM  OPERATIONS              $ (326,521)
================================================================================
*Dividend income and realized net gain from affiliated companies
 were $2,549,000 and $28,000, respectively.

                                       21
<PAGE>

STATEMENT OF CHANGES IN NET ASSETS

This Statement shows how the fund's total net assets changed during the two most
recent reporting periods. The Operations section summarizes information detailed
in  the  Statement  of  Operations.   The  amounts  shown  as  Distributions  to
shareholders  from the fund's net  income  and  capital  gains may not match the
amounts shown in the Operations section, because distributions are determined on
a tax  basis  and may be made in a period  different  from the one in which  the
income was earned or the gains were  realized on the financial  statements.  The
Capital Share Transactions section shows the amount shareholders invested in the
fund,  either by purchasing shares or by reinvesting  distributions,  as well as
the amounts redeemed.  The  corresponding  numbers of Shares Issued and Redeemed
are shown at the end of the Statement.
- --------------------------------------------------------------------------------
                                                         WELLESLEY INCOME FUND
                                                         YEAR ENDED DECMEBER 31,
                                                       -------------------------
                                                               1999        1998
                                                              (000)       (000)
- --------------------------------------------------------------------------------
INCREASE (DECREASE) IN NET ASSETS
OPERATIONS
  Net Investment Income                                 $   413,224  $  403,978
  Realized Net Gain                                         370,860     397,100
  Change in Unrealized Appreciation (Depreciation)       (1,110,605)     96,210
                                                       -------------------------
      Net Increase (Decrease) in Net Assets Resulting
       from Operations                                     (326,521)    897,288
                                                       -------------------------
DISTRIBUTIONS
  Net Investment Income                                    (414,744)   (402,480)
  Realized Capital Gain                                    (444,853)   (413,626)
                                                       -------------------------
      Total Distributions                                  (859,597)   (816,106)
                                                       -------------------------
CAPITAL SHARE TRANSACTIONS1
  Issued                                                    778,086   1,254,529
  Issued in Lieu of Cash Distributions                      739,241     705,454
  Redeemed                                               (1,852,604) (1,189,285)
                                                       -------------------------
      Net Increase (Decrease) from Capital
       Share Transactions                                  (335,277)    770,698
- --------------------------------------------------------------------------------
  Total Increase (Decrease)                              (1,521,395)    851,880
- --------------------------------------------------------------------------------
NET ASSETS
  Beginning of Year                                       8,497,780   7,645,900
                                                       -------------------------
  End of Year                                            $6,976,385  $8,497,780
================================================================================
1Shares Issued (Redeemed)
  Issued                                                     36,384      55,868
  Issued in Lieu of Cash Distributions                       37,674      31,680
  Redeemed                                                  (88,183)    (53,098)
                                                       -------------------------
      Net Increase (Decrease) in Shares Outstanding         (14,125)     34,450
================================================================================

                                       23
<PAGE>

FINANCIAL HIGHLIGHTS

This table  summarizes  the  fund's  investment  results  and  distributions  to
shareholders on a per-share  basis. It also presents the fund's Total Return and
shows net  investment  income and expenses as percentages of average net assets.
These data will help you assess:  the  variability  of the fund's net income and
total returns from year to year;  the relative  contributions  of net income and
capital gains to the fund's total return; how much it costs to operate the fund;
and the extent to which the fund tends to distribute  capital  gains.  The table
also  shows the  Portfolio  Turnover  Rate,  a measure of  trading  activity.  A
turnover  rate of 100% means that the  average  security is held in the fund for
one year.
<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------
                                                                        WELLESLEY INCOME FUND
                                                                       YEAR ENDED DECEMBER 31,
                                                            ------------------------------------------
FOR A SHARE OUTSTANDING THROUGHOUT EACH YEAR                  1999     1998     1997    1996     1995
- ------------------------------------------------------------------------------------------------------
<S>                                                           <C>       <C>      <C>     <C>      <C>
NET ASSET VALUE, BEGINNING OF YEAR                           $22.12  $21.86   $20.51  $20.44   $17.05
- ------------------------------------------------------------------------------------------------------
INVESTMENT OPERATIONS
   Net Investment Income                                      1.120    1.13    1.190    1.17     1.13
   Net Realized and Unrealized Gain (Loss) on Investments    (2.025)   1.40    2.805     .66     3.68
                                                            ------------------------------------------
             Total from Investment Operations                 (.905)   2.53    3.995    1.83     4.81
                                                            ------------------------------------------
DISTRIBUTIONS
         Dividends from Net Investment Income                (1.120)  (1.13)  (1.200)  (1.16)   (1.14)
         Distributions from Realized Capital Gains           (1.245)  (1.14)  (1.445)   (.60)    (.28)
                                                            ------------------------------------------
             Total Distributions                             (2.365)  (2.27)  (2.645)  (1.76)   (1.42)
- ------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF YEAR                                 $18.85  $22.12   $21.86  $20.51   $20.44
======================================================================================================
TOTAL RETURN                                                 -4.14%  11.84%   20.19%   9.42%   28.91%
======================================================================================================
RATIOS/SUPPLEMENTAL DATA
         Net Assets, End of Year (Millions)                  $6,976  $8,498   $7,646  $7,013   $7,181
         Ratio of Total Expenses to Average Net Assets        0.30%   0.31%    0.31%   0.31%    0.35%
         Ratio of Net Investment Income to Average Net Assets 5.22%   5.05%    5.47%   5.74%    5.96%
         Portfolio Turnover Rate                                20%     32%      36%     26%      32%
======================================================================================================
</TABLE>

                                       23
<PAGE>

NOTES TO FINANCIAL STATEMENTS

Vanguard Wellesley Income Fund is registered under the Investment Company Act of
1940 as a diversified  open-end  investment  company, or mutual fund. Certain of
the fund's investments are in long-term corporate debt instruments; the issuers'
abilities to meet these obligations may be affected by economic  developments in
their respective industries.

A. The following  significant  accounting policies conform to generally accepted
accounting  principles  for mutual  funds.  The fund  consistently  follows such
policies in preparing its financial statements.

         1.  SECURITY  VALUATION:  Equity  securities  are  valued at the latest
quoted  sales  prices as of the close of trading on the New York Stock  Exchange
(generally  4:00 p.m.  Eastern time) on the valuation  date; such securities not
traded on the valuation date are valued at the mean of the latest quoted bid and
asked  prices.  Prices are taken from the primary  market in which each security
trades.  Bonds are valued using the latest bid prices or using  valuations based
on a matrix system (which  considers  such factors as security  prices,  yields,
maturities,  and ratings),  both as furnished by independent  pricing  services.
Temporary cash investments are valued at cost, which approximates  market value.
Securities for which market  quotations are not readily  available are valued by
methods deemed by the Board of Trustees to represent fair value.

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

         3.  REPURCHASE  AGREEMENTS:  The fund,  along with other members of The
Vanguard  Group,  transfers  uninvested  cash balances to a Pooled Cash Account,
which  is  invested  in  repurchase   agreements  secured  by  U.S.   government
securities.  Securities pledged as collateral for repurchase agreements are held
by a custodian bank until the agreements  mature.  Each agreement  requires that
the market value of the  collateral be sufficient to cover  payments of interest
and principal; however, in the event of default or bankruptcy by the other party
to  the  agreement,  retention  of  the  collateral  may  be  subject  to  legal
proceedings.

         4.  DISTRIBUTIONS:  Distributions  to shareholders  are recorded on the
ex-dividend  date.  Distributions  are  determined on a tax basis and may differ
from net investment  income and realized  capital gains for financial  reporting
purposes.

         5. OTHER: Dividend income is recorded on the ex-dividend date. Security
transactions  are accounted for on the date securities are bought or sold. Costs
used to determine  realized gains (losses) on the sale of investment  securities
are those of the  specific  securities  sold.  Premiums  and  discounts  on debt
securities  purchased  are amortized  and  accreted,  respectively,  to interest
income over the lives of the respective securities.

B. Wellington  Management Company,  llp provides investment advisory services to
the fund for a fee  calculated  at an  annual  percentage  rate of  average  net
assets.  The basic fee is subject to quarterly  adjustments based on performance
relative to a combined index comprising the Lehman Brothers Long Corporate AA or
Better Bond Index,  the S&P 500/BARRA Value Index,  the S&P Utilities Index, and
the S&P Telephone  Index. For the year ended December 31, 1999, the advisory fee
represented  an effective  annual basic rate of 0.05% of the fund's  average net
assets before a decrease of $196,000 based on performance.

C. The Vanguard Group  furnishes at cost corporate  management,  administrative,
marketing,  and distribution  services. The costs of such services are allocated
to the fund  under  methods  approved  by the  Board of  Trustees.  The fund has
committed to provide up to 0.40% of its net assets in capital  contributions  to
Vanguard.  At December 31, 1999, the fund had contributed  capital of $1,500,000
to Vanguard  (included in Other  Assets),  representing  0.02% of the fund's net
assets and 1.5% of Vanguard's  capitalization.  The fund's Trustees and officers
are also  Directors  and officers of Vanguard.

                                       24
<PAGE>

D. Vanguard has asked the fund's  investment  adviser to direct certain security
trades,  subject to obtaining the best price and execution,  to brokers who have
agreed to rebate to the fund part of the commissions generated. Such rebates are
used solely to reduce the fund's  management and  administrative  expenses.  The
fund's custodian bank has also agreed to reduce its fees when the fund maintains
cash on deposit in the non-interest-bearing  custody account. For the year ended
December 31, 1999,  directed  brokerage and  custodian  fee offset  arrangements
reduced  expenses by  $410,000  and  $19,000,  respectively.  The total  expense
reduction  represented  an effective  annual rate of 0.01% of the fund's average
net assets.

E. During the year ended December 31, 1999, the fund purchased $1,228,453,000 of
investment  securities and sold $1,721,450,000 of investment  securities,  other
than U.S.  government  securities and temporary cash investments.  Purchases and
sales  of  U.S.  government   securities  were  $349,480,000  and  $494,119,000,
respectively.

F. At December 31, 1999, net unrealized  appreciation  of investment  securities
for  financial  reporting  and federal  income tax  purposes  was  $158,783,000,
consisting of unrealized  gains of  $584,652,000 on securities that had risen in
value since their purchase and  $425,869,000 in unrealized  losses on securities
that had fallen in value since their purchase.

G. The market value of securities on loan to broker/dealers at Decmber 31, 1999,
was  $274,183,000,  for which the fund held cash collateral of $104,000 and U.S.
Treasury  securities  with a  market  value  of  $276,976,000.  Cash  collateral
received is invested in repurchase agreements. Security loans are required to be
secured  at all  times by  collateral  at least  equal  to the  market  value of
securities loaned;  however,  in the event of default or bankruptcy by the other
party to the  agreement,  retention  of the  collateral  may be subject to legal
proceedings.

                                       25
<PAGE>


REPORT OF INDEPENDENT ACCOUNTANTS

To the Shareholders and Trustees of
Vanguard Wellesley Income Fund

In our  opinion,  the  accompanying  statement  of net  assets  and the  related
statements  of  operations  and of  changes  in net  assets  and  the  financial
highlights present fairly, in all material  respects,  the financial position of
Vanguard Wellesley Income Fund (the "Fund") at December 31,1999,  the results of
its operations  for the year then ended,  the changes in its net assets for each
of the two years in the period then ended and the financial  highlights for each
of the five  years in the period  then  ended,  in  conformity  with  accounting
principles  generally accepted in the United States.  These financial statements
and financial highlights  (hereafter referred to as "financial  statements") are
the responsibility of the Fund's management; our responsibility is to express an
opinion on these  financial  statements  based on our audits.  We conducted  our
audits of these  financial  statements  in accordance  with  auditing  standards
generally accepted in the United States,  which require that we plan and perform
the audit to obtain reasonable  assurance about whether the financial statements
are free of material misstatement. An audit includes examining, on a test basis,
evidence  supporting the amounts and  disclosures  in the financial  statements,
assessing the  accounting  principles  used and  significant  estimates  made by
management,  and evaluating the overall  financial  statement  presentation.  We
believe that our audits,  which included  confirmation of securities at December
31, 1999 by  correspondence  with the custodian,  provide a reasonable basis for
the opinion expressed above.

PricewaterhouseCoopers LLP

Thirty South Seventeenth Street
Philadelphia, Pennsylvania 19103

February 2, 2000
- --------------------------------------------------------------------------------
SPECIAL 1999 TAX INFORMATION (UNAUDITED) FOR
VANGUARD WELLESLEY INCOME FUND

This  information  for the fiscal  year ended  December  31,  1999,  is included
pursuant to  provisions  of the  Internal  Revenue  Code.

     The fund  distributed  $417,769,000  as capital  gain  dividends  (from net
long-term  capital gains) to shareholders  during the fiscal year ended December
1999, all of which is designated as a 20% rate gain distribution.

     For corporate  shareholders,  19.9% of investment  income  (dividend income
plus short-term gains, if any) qualifies for the dividends-received deduction.
- --------------------------------------------------------------------------------

                                       26
<PAGE>

THE VANGUARD FAMILY OF FUNDS

STOCK FUNDS
- ------------------------------------------------
500 Index Fund
Aggressive Growth Fund
Capital Opportunity Fund
Convertible Securities Fund
Emerging  Markets Stock Index Fund
Energy Fund Equity Income Fund
European Stock Index Fund
Explorer Fund
Extended Market Index Fund*
Global Equity Fund
Gold and Precious  Metals Fund
Growth and Income Fund
Growth Index Fund*
Health Care Fund
Institutional  Index Fund*
International  Growth Fund
International  Value Fund
Mid-Cap  Index Fund*
Morgan  Growth Fund
Pacific  Stock Index Fund
PRIMECAP Fund
REIT Index Fund
Selected Value Fund
Small-Cap Growth Index Fund*
Small-Cap Index Fund*
Small-Cap  Value  Index  Fund*
Tax-Managed  Capital  Appreciation  Fund*
Tax-Managed Growth and Income Fund*
Tax-Managed  International Fund*
Tax-Managed Small-Cap  Fund*
Total  International  Stock Index Fund
Total Stock Market Index Fund*
U.S.  Growth Fund
Utilities  Income Fund
Value Index Fund*
Windsor  Fund
Windsor II Fund

BALANCED FUNDS
- ------------------------------------------------
Asset Allocation Fund
Balanced Index Fund
Global Asset Allocation Fund
LifeStrategy Conservative Growth Fund
LifeStrategy Growth Fund
LifeStrategy Income Fund
LifeStrategy Moderate Growth Fund
STAR Fund
Tax-Managed Balanced Fund
Wellesley Income Fund
Wellington Fund

BOND FUNDS
- ------------------------------------------------
Admiral Intermediate-Term Treasury Fund
Admiral Long-Term Treasury Fund
Admiral Short-Term Treasury  Fund
GNMA Fund
High-Yield Corporate Fund
High-Yield Tax-Exempt Fund
Insured Long-Term Tax-Exempt Fund
Intermediate-Term Bond Index Fund
Intermediate-Term Corporate Fund
Intermediate-Term Tax-Exempt Fund
Intermediate-Term  Treasury Fund
Limited-Term Tax-Exempt Fund
Long-Term Bond Index Fund
Long-Term Corporate Fund
Long-Term Tax-Exempt Fund
Long-Term Treasury Fund
Preferred Stock Fund
Short-Term Bond Index Fund
Short-Term Corporate Fund*
Short-Term Federal Fund
Short-Term Tax-Exempt Fund
Short-Term Treasury Fund
State Tax-Exempt Bond Funds (California,
 Florida, Massachusetts, New Jersey,
 New York, Ohio, Pennsylvania)
Total Bond Market Index Fund*







MONEY MARKET FUNDS
- ------------------------------------------------
Admiral Treasury Money Market Fund
Federal Money Market Fund
Prime Money Market Fund*
State Tax-Exempt Money Market Funds
 (California, New Jersey, New York,
  Ohio, Pennsylvania)
Tax-Exempt Money Market Fund
Treasury Money Market Fund

VARIABLE  ANNUITY PLAN
- ------------------------------------------------
Balanced Portfolio
Diversified Value Portfolio
Equity Income Portfolio
Equity Index  Portfolio
Growth Portfolio
High-Grade Bond Portfolio
High Yield  Bond  Portfolio
International Portfolio
Mid-Cap Index Portfolio
Money Market Portfolio
REIT Index Portfolio
Short-Term Corporate Portfolio
Small Company Growth Portfolio

*Offers Institutional Shares.

For information  about Vanguard funds and our variable  annuity plan,  including
charges and  expenses,  obtain a prospectus  from The Vanguard  Group,  P.O. Box
2600,  Valley Forge, PA 19482-2600.  Read it carefully before you invest or send
money.

                                       27
<PAGE>
- --------------------------------------------------------------------------------
THE PEOPLE WHO GOVERN YOUR FUND

The  Trustees of your mutual fund are there to see that the fund is operated and
managed in your best interests  since,  as a shareholder,  you are part owner of
the fund.  Your  fund  Trustees  also  serve on the  Board of  Directors  of The
Vanguard  Group,  which is owned by the  funds  and  exists  solely  to  provide
services to them on an at-cost basis.

         Seven of Vanguard's  nine board members are  independent,  meaning that
they have no affiliation with Vanguard or the funds they oversee, apart from the
sizable personal investments they have made as private  individuals.  They bring
distinguished  backgrounds  in business,  academia,  and public service to their
task of working with Vanguard officers to establish the policies and oversee the
activities of the funds.

         Among board members' responsibilities are selecting investment advisers
for the funds;  monitoring fund operations,  performance,  and costs;  reviewing
contracts;  nominating  and  selecting  new  Trustees/Directors;   and  electing
Vanguard officers.

         The  list  below  provides  a  brief   description  of  each  Trustee's
professional affiliations. Noted in parentheses is the year in which the Trustee
joined the Vanguard Board.

TRUSTEES

JOHN C. BOGLE (1967) Founder, Senior Chairman of the Board, and Director/Trustee
of The  Vanguard  Group,  Inc.,  and  each of the  investment  companies  in The
Vanguard Group.

JOHN J. BRENNAN  (1987)  Chairman of the Board,  Chief  Executive  Officer,  and
Director/Trustee  of The  Vanguard  Group,  Inc.,  and  each  of the  investment
companies in The Vanguard Group.

JOANN HEFFERNAN HEISEN (1998) Vice President,  Chief Information  Officer, and a
member of the  Executive  Committee of Johnson & Johnson;  Director of Johnson &
Johnson Merck Consumer Pharmaceuticals Co., The Medical Center at Princeton, and
Women's Research and Education Institute.

BRUCE K.  MACLAURY  (1990)  President  Emeritus  of The  Brookings  Institution;
Director of  American  Express  Bank Ltd.,  The St. Paul  Companies,  Inc.,  and
National Steel Corp.

BURTON G. MALKIEL  (1977)  Chemical  Bank  Chairman's  Professor  of  Economics,
Princeton  University;  Director of Prudential  Insurance Co. of America,  Banco
Bilbao Gestinova,  Baker Fentress & Co., The Jeffrey Co., and Select Sector SPDR
Trust.

ALFRED M. RANKIN, JR. (1993) Chairman,  President,  Chief Executive Officer, and
Director of NACCO Industries, Inc.; Director of The BFGoodrich Co.

JOHN C.  SAWHILL  (1991)  President  and Chief  Executive  Officer of The Nature
Conservancy;  formerly,  Director  and  Senior  Partner  of  McKinsey  & Co. and
President  of New York  University;  Director of Pacific Gas and  Electric  Co.,
Procter & Gamble Co., NACCO Industries, and Newfield Exploration Co.

JAMES O. WELCH,  JR. (1971) Retired  Chairman of Nabisco Brands,  Inc.;  retired
Vice Chairman and Director of RJR Nabisco;  Director of TECO Energy,  Inc.,  and
Kmart Corp.

J.  LAWRENCE  WILSON  (1985)  Retired  Chairman of Rohm & Haas Co.;  Director of
Cummins Engine Co. and The Mead Corp.; Trustee of Vanderbilt University.
- --------------------------------------------------------------------------------
OTHER FUND OFFICERS

RAYMOND J. KLAPINSKY Secretary;  Managing Director and Secretary of The Vanguard
Group,  Inc.;  Secretary  of each of the  investment  companies  in The Vanguard
Group.

THOMAS J. HIGGINS Treasurer; Principal of The Vanguard Group, Inc.; Treasurer of
each of the investment companies in The Vanguard Group.

VANGUARD MANAGING DIRECTORS

R. GREGORY BARTON  Legal Department.
ROBERT A. DISTEFANO  Information Technology.
JAMES H. GATELY  Individual Investor Group.
KATHLEEN C. GUBANICH  Human Resources.
IAN A. MACKINNON  Fixed Income Group.
F. WILLIAM MCNABB, III  Institutional Investor Group.
MICHAEL S. MILLER  Planning and Development.
RALPH K. PACKARD  Chief Financial Officer.
GEORGE U. SAUTER  Core Management Group.

<PAGE>

ABOUT OUR COVER

Our cover art,  depicting HMS Vanguard at sea, is a reproduction  of Leading the
Way, a 1984 work created and  copyrighted by noted naval artist Tom Freeman,  of
Forest Hill, Maryland.

[SHIP]
[THE VANGUARD GROUP LOGO]

Post Office Box 2600
Valley Forge, Pennsylvania 19482-2600

All  comparative  mutual fund data are from Lipper  Inc. or  Morningstar,  Inc.,
unless otherwise noted.

"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.

Frank Russell Company is the owner of trademarks and copyrights  relating to the
Russell Indexes.  "Wilshire 4500" and "Wilshire 5000" are trademarks of Wilshire
Associates.

WORLD WIDE WEB
www.vanguard.com

FUND INFORMATION
1-800-662-7447

INDIVIDUAL ACCOUNT SERVICES
1-800-662-2739

INSTITUTIONAL INVESTOR SERVICES
1-800-523-1036

This report is intended for the fund's  shareholders.  It may not be distributed
to  prospective  investors  unless it is preceded or  accompanied by the current
fund prospectus.

Q270-02/18/2000

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



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