MATHERS FUND INC
N-30D, 2000-03-07
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                            THE GABELLI MATHERS FUND


                                  ANNUAL REPORT
                                DECEMBER 31, 1999







                                          [Photo of Henry G. Van der Eb omitted]
                                                             HENRY G. VAN DER EB

TO OUR SHAREHOLDERS,


      The major U.S.  stock  market  indices  continued  to set records in 1999,
despite sharply rising interest rates,  unprecedented  overvaluation relative to
the U.S. economy and various long-term  benchmarks,  and an increasingly  narrow
list of stocks participating in the advance.

      The Gabelli Mathers Fund, in deference to historical  precedent  analysis,
maintained a conservative  and, at times, a net short stock portfolio  structure
during 1999. For the year, the Fund's total return was 5.73%. The equity segment
of the  portfolio  averaged  8.9% long and 2% short  individual  stocks,  within
ranges of 0% to 52.2%, and 0% to 16.8% of assets, respectively. The fixed income
segment of the portfolio  averaged  91.1% U.S.  Treasury  securities,  primarily
short-term Treasury bills, within a range of 47.8% to 100% of assets. The equity
segment,  which  includes  long and short  positions in stocks and S&P 500 stock
index futures, and the fixed income segment,  which includes U.S. Treasury bills
and notes, and repurchase  agreements,  each contributed  approximately the same
amount to the Fund's total return for 1999.

      During the last quarter of 1999, the Fund's common stock  investments were
significantly  increased,  but were  concentrated  in stocks of takeover  target
companies  subject  to  friendly,  all cash  tender  or  merger  offers  from an
acquiring  company.  The Fund purchased these special situation stocks after the
deals were publicly announced,  generally by a financially strong, strategically
motivated  buyer.  These stocks are typically  held for short time periods,  but
earn relatively high annualized  returns.  The Fund may continue to utilize this
relatively low-risk, defensive,  non-market correlated stock investment strategy
in order to  potentially  increase  cash returns above the  prevailing  level of
short-term interest rates.

<PAGE>
      The Fund has  maintained a bearish bias since  various  fundamental  stock
valuation   benchmarks  have  indicated  a  high-risk  market  by  significantly
exceeding the upper limits of their long-term  historical  ranges in both degree
and duration.  The portfolio  continues to be positioned to take  advantage of a
sustained  stock  market  decline.  Over the long term,  the Fund seeks  capital
appreciation in both up and down markets,  with a relatively low risk of capital
loss.

BULL MARKET MANIA

      The  extraordinary  characteristics  of a classic  stock market mania have
become  increasingly  apparent since early 1995, and were  particularly  evident
during the last quarter of 1999. When a mania starts, stock prices take off with
a powerful upward thrust,  starting where a long-term bull market would normally
end, and continue  upward in relentless  price spurts with fewer,  shorter,  and
smaller  pullbacks.  This pattern is marked on the chart below as the Great Baby
Boomer Stock Mania of 1995 -'99.


           U.S. STOCK MARKET CAPITALIZATION AS PERCENT OF NOMINAL GDP

       [This chart was prepared for Mathers Fund by Topline Investment Graphics,
Boulder,  CO. A hard copy is available by calling Mathers Fund at  800-962-3863.
The line is the ratio of stock market capitalization divided by nominal GDP. The
chart's  X-axis  represents  years,  from 1926 through 2000 and its Y-axis shows
percentage points,  from 0 to 175. The average,  since 1926, has been 51.5%. The
high points (August 1929, 81.4%; November 1968, 77.8% and December 1972, 78.10%)
were all followed by severe bear  markets.  The current  value is a record high,
160.1%.

       Two smaller charts appear in a box inset in the main chart. Each of these
charts shows a parabolic price rise, a top and the following sharp decline.  The
first of the two charts  reflects  the price of the Tokyo Nikkei stock index and
begins in  January  1985 at about  11,000  Yen,  continues  through  its peak in
November  1989 near 39,000 Yen to its  year-end  1992 level of 15,000  Yen.  The
second of the two charts  shows the Dow Jones  Industrial  Average from its 1925
level of 125,  through the 1929 peak of around 375 to its year-end 1931 level of
60.]

                                        2
<PAGE>
      Distinguishing features of stock manias include the following: broad-based
public  participation  as  individuals  are swept up by the  contagion  of crowd
psychology,  demand for stocks  accelerates  as buyers are  attracted  solely by
price  momentum,  gross  overvaluation,   get  rich  quick  urgency,  irrational
indifference to risk, novices outperforming  investment  professionals,  and the
total  discrediting  of  bearish  views.  As the  bubble  inflates,  it  becomes
progressively more unstable and likely to burst  spontaneously since it requires
proportionately  larger  amounts of new money  inflows to sustain its  expanding
size.  The  speculative   frenzy  continues  with  increasing   intra-day  price
volatility,  followed by a last-gasp buying panic as prices refuse to stay down.
This  terminal  spike ends  abruptly with an  unpredictable  trend  reversal and
precipitous drop. As prices collapse,  demand falters,  supply surges and prices
eventually fall below the starting point of the entire advance.

      Manias,  whether in stocks,  Gouda tulip bulbs,  numismatic  coins,  gold,
Beanie Babies,  or real estate,  stop when the false  confidence and complacency
that prices will continue to rise indefinitely is broken.  Federal Reserve Board
Chairman,  Alan  Greenspan,  made the  following  statement on October 14, 1999:
"History tells us that sharp reversals in confidence occur abruptly,  most often
with little advance notice.  These reversals can be  self-reinforcing  processes
that can compress sizable adjustments into a very short period.  Panic reactions
in the market are characterized by dramatic shifts in behavior that are intended
to  minimize  short-term  losses.  What is so  intriguing  is that  this type of
behavior has characterized human interaction with little appreciable change over
the generations."

      The Consumer  Confidence  Index,  as calculated  monthly by the Conference
Board,  rose to a  31-year  high in  December.  The last  time this 'man on Main
Street'  index  was this high was  October  of 1968,  at the peak of the  1960's
`Go-Go'  mutual fund era and the  beginning of a 14-year  series of bear markets
which ended in August of 1982.  Additionally,  today's all-time high fundamental
stock valuations are a confirming reflection of the extreme 'man on Wall Street'
euphoria toward stocks.  Prevailing  psychology makes it very difficult to see a
speculative bubble when one is inside of it.

COLLISION COURSE: RISING INTEREST RATES VS. STOCK PRICES

      "Stocks cannot forever  outperform  their underlying  businesses,  as they
have so dramatically  done for some time," said renowned investor Warren Buffett
in 1993,  and in 1999,  "The  absolute  most that the owners of a  business,  in
aggregate, can get out of it in the end - between now and Judgment Day - is what
the business earns over time."

      Extraordinary  double-digit  appreciation  has decoupled stock prices from
their intrinsic values.  Over the last four years, the unprecedented  divergence
between the S&P 500's price  change  versus its earnings  growth rate,  dividend
yield,  and other  fundamental  measures has  continued  to widen.  For example,
during the period from  12-31-95 to  12-31-99,  the S&P 500 Index  increased  an
amazing 4.2 times the  percentage  increase in reported  earnings  and 5.0 times
faster  than  operating  earnings.  The  compound  annual  increase  in reported
earnings for this 4-year period was 8.2%, and 5.4% for operating earnings,  with
both figures reasonably in line with long-term economic growth. What is

                                        3
<PAGE>
abnormal is the  unwarranted  ballooning of the price to earnings ratio relative
to interest rates and overstated earnings.

      Historically,  rising  interest rates have preceded more bear markets than
any other factor and are now exerting  significant pressure to narrow the record
gap between stock prices and  fundamental  value.  Despite only modest recent up
ticks in wage and price inflation,  interest rates remain likely to trend higher
due to the massive financing  requirements of the burgeoning U.S. trade deficit.
Four years ago, at year-end '95, the yield on the 30-year U.S. Treasury bond was
6.0% vs. 6.6% now and the yields on 2, 5 and 10-year U.S. Treasury notes are now
proportionally higher as well. The rationale that the S&P 500 has zoomed up over
the last four years due to strong earnings  growth and declining  interest rates
does not fit the facts.

      Despite  the year end rally,  the S&P 500's 1.1%  dividend  yield and 2.9%
earnings yield,  both at historic lows relative to bond yields,  are unlikely to
buck rising  interest  rates and the Federal  Reserve's  tight money  policy for
long.  Only twice this century has a central bank raised interest rates during a
period of intense stock market  speculation  that had not only become a national
obsession,  but a significant threat to long-term economic growth and stability.
In both cases, the U.S. in 1929 and Japan in 1989,  rising interest rates became
the unintentional pin that burst the bubble.

NEW ERA, OR OLD ERA GONE TO NEW EXTREMES?

      The  accelerating  transition  from the industrial to the  information age
continues.  As this process has evolved,  the majority of 'Old  Economy'  stocks
began to decline in April of 1998,  while a non-stop  stampede into a short list
of  overpriced  large  capitalization  'New Economy'  stocks has pushed  several
averages  to  remarkable  new highs,  masking the  deterioration  in the overall
market.  Incredibly,  the NASDAQ Composite price to earnings ratio has soared to
over 200, as stocks of Internet and  technology  companies that are losing money
have skyrocketed.  Ironically, stocks of many companies that are profitable have
declined. Additionally,  fantasy projections have catapulted the prices of money
losing,  miniscule revenue,  Internet IPOs to absurd multi-billion dollar market
values,  despite  expert  opinion  that less than five  percent of all  Internet
companies will ever be profitable.

      Arguably,  there  are many 'Old  Economy'  stocks  that are  statistically
cheap,  however,  there are two  significant  risks to owning them.  First,  the
Internet is having a  deflationary  impact on corporate  pricing  power which is
reducing profitability,  so stocks that look undervalued on current earnings may
become  overpriced  as future  revenues and earnings  fail to  materialize;  and
second,  past secular bear  markets,  as was the case in 1973 -'74,  demonstrate
that when the leaders  break  price,  very few stocks go up,  regardless  of how
cheap they appear or how much they have declined  prior to the top in the widely
followed stock averages.

                                        4
<PAGE>
      As shown in the chart and inset  table  below,  during the last 128 years,
both high and low stock market valuation  extremes have ultimately  regressed to
the mean,  despite  compelling  rationalizations  supporting them prior to major
turning points.

                 THE BUBBLE IN STOCKS: AN HISTORICAL PERSPECTIVE

[Contained here in paper format is a chart  reflecting the Standard & Poor's 500
stock index  adjusted  for  inflation.  The X-axis  reflects the years from 1871
through  2000 and its Y-axis is on a  logarithmic  scale and extends  from 15 to
250. The long-term  least squares trend line from 1871 through June 1999 is also
on the chart. The chart was prepared by The Bank Credit Analyst.  A hard copy is
available  by calling  Mathers Fund at  800-962-3863.  The chart is a line chart
with  monthly  data  and  shows  the  extreme  overevaluation  (measured  as the
divergence above the trend line) in the S&P 500 Index.

Also contained within the chart is a table of data as follows:

S&P 500               PRICE        DIVIDEND        P/E
1928 TO 1999          BOOK          YIELD %       RATIO
- -----------------     -----        --------       -----
5 MAJOR BOTTOMS        0.9           7.14           7.8
LONG-TERM AVERAGE      1.9           3.82          14.7
6 MAJOR TOPS           2.4           2.94          20.2
SEPT. '29 TOP          3.6           2.86          21.1
AUG. '87 TOP           2.5           2.58          22.9
JULY '99 HIGH *        7.5           1.18          37.0
DEC. '99 HIGH          7.0           1.14          33.4

*Record Overevaluation]


      There are numerous analytical  approaches that can be used to quantify the
downside  risk in today's  stock  market.  The Federal  Reserve's  own  internal
valuation model,  which uses the S&P 500 consensus forward estimate of operating
earnings divided by the 10-year U.S. Treasury note yield, calculates the S&P 500
was 62%  overvalued at year-end  1999,  compared to 33% prior to the 1987 Crash.
Using regression to the long-term means and medians for various fundamental data
series,  including  those shown on the charts and table above,  gives an average
downside   projection   of   approximately   65%,  and  a  move  to   historical
undervaluation, a loss of about 75%.

IN CONCLUSION

      No one yet knows whether a lasting  paradigm shift in equity  valuation or
economic  stability  has actually  occurred,  and we will not know the answer at
least  until the next  bear  market  and  recession  are  over.  We do know that
previous 'new era' stock  valuations and perpetual  prosperity  thinking,  which
occurred in the U.S. in the late 1920's and Japan in the late 1980's, turned out
to be new

                                        5
<PAGE>
excesses within the 'old era,'  regardless of new  technological  advances.  Fed
Chairman  Greenspan  commented  in  February of 1997,  "Regrettably,  history is
strewn with visions of 'New Eras' that, in the end, have proven to be a mirage."
History remains on the side of the skeptics, at least for now.


                                   Sincerely,



                                  /s/ Signature
                                  HENRY G. VAN DER EB, CFA
                                  President and Portfolio Manager

January 10, 2000


NOTE: The views expressed in this report reflect those of the portfolio  manager
only through the end of the period covered in this report.  The manager's  views
are subject to change at any time based on market and other conditions.

GROWTH OF A $10,000 INVESTMENT IN GABELLI MATHERSD FUND

                  GABELLI               S&P 500
                MATHERS FUND             INDEX
                ------------            -------
                  $10,000               $10,000
'65                12,089                10,768
'66                12,598                 9,685
'67                24,266                12,006
'68                30,784                13,334
'69                28,937                12,199
'70                29,507                12,687
'71                35,358                14,504
'72                41,062                17,256
'73                25,807                14,728
'74                17,910                10,831
'75                28,128                14,861
'76                40,608                18,405
'77                46,375                17,084
'78                53,359                18,204
'79                78,197                21,561
'80               109,703                28,551
'81               101,212                27,178
'82               116,252                32,994
'83               135,039                40,424
'84               131,555                42,955
'85               167,719                56,606
'86               191,149                67,203
'87               242,836                70,731
'88               276,177                82,444
'89               304,927               108,562
'90               336,731               105,196
'91               368,552               137,166
'92               380,014               147,604
'93               388,109               162,453
'94               365,249               164,581
'95               390,853               226,348
'96               390,579               278,295
'97               402,336               371,134
'98               381,334               477,724
'99               403,184               578,237


                           COMPOUND ANNUAL RETURNS (A)

                              1 YR         5 YRS         10 YRS       34 YRS (B)
                              ----         -----         ------       ----------
GABELLI MATHERS FUND          5.73%         2.00%         2.83%       11.36%
Standard & Poor's 500        21.04%        28.56%        18.21%       12.53%

Past performance is not predictive of future performances. (a) Total returns and
average  annual  returns  reflect  changes in share  price and  reinvestment  of
dividends and are net of expenses. The net asset value of the Fund is reduced on
the  ex-dividend  (payment)  date by the amount of the dividend paid. Of course,
returns  represent  past  performance  and  do  not  guarantee  future  results.
Investment returns and the principal value of an investment will fluctuate. When
shares are redeemed they may be worth more or less than their original cost. (b)
From commencement of investment operations on August 19, 1965

                                       6
<PAGE>

THE GABELLI MATHERS FUND
PORTFOLIO OF INVESTMENTS -- DECEMBER 31, 1999
- --------------------------------------------------------------------------------
                                                              MARKET
    SHARES                                       COST         VALUE
   -------                                       ----         ------

              COMMON STOCKS -- 36.5%
              AUTOMOTIVE: PARTS AND ACCESSORIES -- 0.1%
      5,000   Federal-Mogul Corp. .........  $     93,325  $    100,625
      1,500   Transportation Technologies
               Industries Inc.+ ...........        26,625        27,094
                                             ------------  ------------
                                                  119,950       127,719
                                             ------------  ------------
              CONSUMER PRODUCTS -- 1.7%
    195,000   Gibson Greetings Inc. .......     1,810,518     1,748,906
                                             ------------  ------------
              ELECTRONICS -- 1.9%
     50,000   Watkins-Johnson Co. .........     1,956,976     2,000,000
                                             ------------  ------------
              ENERGY AND UTILITIES-- 13.7%
     70,000   Aquarion Co. ................     2,562,107     2,590,000
     75,000   Eastern Utilities Associates      2,272,969     2,273,438
    100,000   MidAmerican Energy
               Holdings Co.+ ..............     3,323,942     3,368,750
     80,500   New England Electric System .     4,243,085     4,165,875
      4,500   Southwest Gas Corp. .........       108,913       103,500
     20,000   United Water Resources Inc. .       671,044       683,750
     40,000   WICOR Inc. ..................     1,200,588     1,167,500
                                             ------------  ------------
                                               14,382,648    14,352,813
                                             ------------  ------------
              FINANCIAL SERVICES -- 3.1%
     62,500   Foremost Corp. of America ...     1,758,987     1,773,437
     30,000   PIMCO Advisors Holdings LP ..     1,121,800     1,130,625
     10,000   UST Corp. ...................       316,250       317,500
                                             ------------  ------------
                                                3,197,037     3,221,562
                                             ------------  ------------
              HOTELS AND GAMING -- 2.5%
    320,000   Players International Inc.+ .     2,435,161     2,630,000
                                             ------------  ------------
              PAPER AND FOREST PRODUCTS -- 0.4%
     10,000   TJ International Inc. .......       416,250       420,000
                                             ------------  ------------
              REAL ESTATE INVESTMENT TRUST -- 3.4%
    310,000   Imperial Credit Commercial
               Mortgage Investment
               Corp. ......................     3,483,682     3,526,250
                                             ------------  ------------
              RETAIL -- 0.9%
     45,000   Catherine's Stores Corp.+ ...       905,312       945,000
                                             ------------  ------------
              SATELLITE -- 4.1%
    211,000   Vertex Communications
               Corp.+ .....................     4,431,460     4,325,500
                                             ------------  ------------
              TRANSPORTATION -- 4.7%
    151,000   Air Express International
               Corp. ......................     4,866,262     4,879,187
                                             ------------  ------------
              TOTAL COMMON STOCKS .........    38,005,256    38,176,937
                                             ------------  ------------




   PRINCIPAL                                                  MARKET
    AMOUNT                                       COST         VALUE
   -------                                       ----         ------

              U.S. TREASURY OBLIGATIONS -- 57.2%
$60,000,000   U.S. Treasury Bills,
               3.95% to 5.31%++,
               due 01/13/00 to 01/20/00 ...  $ 59,854,375  $ 59,854,375
                                             ------------  ------------

              REPURCHASE AGREEMENTS -- 2.1%
  2,271,471   Agreement  with  State  Street
               Bank & Trust  Co.,  3.25%,
               dated 12/31/99,
               due 01/03/00, proceeds
               at maturity $2,272,087(a) ..     2,271,472     2,271,472
                                             ------------  ------------
              TOTAL
               INVESTMENTS -- 95.8% .......  $100,131,103   100,302,784
                                             ============
              OTHER ASSETS AND
               LIABILITIES (NET)-- 4.2% .................     4,390,589
                                                           ------------
              NET ASSETS -- 100%
               (8,768,873 shares outstanding) ...........  $104,693,373
                                                           ============
              NET ASSET VALUE,
               OFFERING AND REDEMPTION
               PRICE PER SHARE ..........................        $11.94
                                                                 ======
              For Federal tax purposes:
              Aggregate cost ............................  $100,137,069
                                                           ============
              Gross unrealized appreciation .............  $    448,998
              Gross unrealized depreciation .............      (283,283)
                                                           ------------
              Net unrealized appreciation ...............  $    165,715
                                                           ============

    ------------------------
(a) Collateralized by U.S. Treasury Bond, 12.38%, due 05/15/04, market value
    $2,317,969.
+   Non-income producing security.
++  Represents annualized yield at date of purchase.

                 See accompanying notes to financial statements.

                                        7
<PAGE>
                            THE GABELLI MATHERS FUND
STATEMENT OF ASSETS AND LIABILITIES
DECEMBER 31, 1999
- --------------------------------------------------------------------------------
ASSETS:
   Investments, at value (Cost $100,131,103) .  $100,302,784
   Dividends and interest receivable .........       174,149
   Receivable for investments sold ...........     5,729,000
   Receivable for Fund shares sold ...........           800
   Other assets ..............................        11,737
                                                ------------
   TOTAL ASSETS ..............................   106,218,470
                                                ------------
LIABILITIES:
   Payable for investments purchased .........     1,343,996
   Payable for Fund shares redeemed ..........        21,660
   Payable for investment advisory fees ......        66,547
   Payable for distribution fees .............        21,945
   Payable to custodian ......................        10,733
   Payable to Trustees .......................         5,000
   Other accrued expenses and liabilities ....        55,216
                                                ------------
   TOTAL LIABILITIES .........................     1,525,097
                                                ------------
   NET ASSETS applicable to 8,768,873
     shares outstanding ......................  $104,693,373
                                                ============
NET ASSETS CONSIST OF:
   Shares of beneficial interest, at par value  $  8,768,873
   Additional paid-in capital ................   134,946,034
   Accumulated net investment income .........        33,622
   Accumulated net realized loss on investments
     and futures contracts ...................   (39,226,837)
   Net unrealized appreciation on investments        171,681
                                                ------------
   TOTAL NET ASSETS                             $104,693,373
                                                ============
   NET ASSET VALUE,  offering and  redemption
     price per share  ($104,693,373 / 8,768,873
     shares outstanding; 100,000,000 shares
     authorized of $1.00 par value) ..........        $11.94
                                                      ======


STATEMENT OF OPERATIONS
FOR THE YEAR ENDED DECEMBER 31, 1999
- --------------------------------------------------------------------------------
INVESTMENT INCOME:
   Dividends .................................    $  213,928
   Interest ..................................     4,738,064
                                                  ----------
   TOTAL INVESTMENT INCOME ...................     4,951,992
                                                  ----------
EXPENSES:
   Investment advisory fees ..................       784,713
   Distribution fees .........................        65,081
   Shareholder services fees .................       129,202
   Legal and audit fees ......................       124,500
   Trustees' fees ............................        40,000
   Custodian fees ............................        37,282
   Registration fees .........................        32,254
   Shareholder communications expenses .......        27,500
   Dividends on securities sold short ........         3,989
   Miscellaneous expenses ....................        50,816
                                                  ----------
   TOTAL EXPENSES ............................     1,295,337
                                                  ----------
   NET INVESTMENT INCOME .....................     3,656,655
                                                  ----------
NET REALIZED AND UNREALIZED GAIN (LOSS)
   ON INVESTMENTS:
   Net realized gain on investments and
     futures contracts .......................     4,428,251
   Net realized loss on securities
     sold short ..............................    (1,893,870)
   Net change in unrealized appreciation on
     investments and securities sold short ...      (445,493)
                                                  ----------
   NET REALIZED AND UNREALIZED GAIN (LOSS)
     ON INVESTMENTS AND
     FUTURES CONTRACTS .......................     2,088,888
                                                  ----------
   NET INCREASE IN NET ASSETS RESULTING
     FROM OPERATIONS .........................    $5,745,543
                                                  ==========


STATEMENT OF CHANGES IN NET ASSETS
- --------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                                   YEAR ENDED           YEAR ENDED
                                                                                DECEMBER 31, 1999    DECEMBER 31, 1998
                                                                                -----------------    -----------------
<S>                                                                               <C>                  <C>
  Net investment income ......................................................    $  3,656,655         $  5,579,805
  Net realized gain (loss) on investments and futures contracts ..............       4,428,251              (51,633)
  Net realized loss on securities sold short .................................      (1,893,870)          (7,643,718)
  Net change in unrealized appreciation on investments and securities sold short      (445,493)          (4,390,362)
                                                                                  ------------         ------------
  NET INCREASE (DECREASE) IN NET ASSETS RESULTING FROM OPERATIONS ............       5,745,543           (6,505,908)
                                                                                  ------------         ------------
DISTRIBUTIONS TO SHAREHOLDERS:
  Net investment income ......................................................      (3,638,301)          (5,529,990)
                                                                                  ------------         ------------
  TOTAL DISTRIBUTIONS TO SHAREHOLDERS ........................................      (3,638,301)          (5,529,990)
                                                                                  ------------         ------------
SHARE TRANSACTIONS:
  Net decrease in net assets from shares of beneficial interest transactions .      (5,961,454)         (17,820,332)
                                                                                  ------------         ------------
  NET DECREASE IN NET ASSETS .................................................      (3,854,212)         (29,856,230)
NET ASSETS:
  Beginning of period ........................................................     108,547,585          138,403,815
                                                                                  ------------         ------------
  End of period (Including undistributed net investment income of $33,622
    and $251,081, respectively) ..............................................    $104,693,373         $108,547,585
                                                                                  ============         ============
</TABLE>
                 See accompanying notes to financial statements.

                                        8
<PAGE>
THE GABELLI MATHERS FUND
NOTES TO FINANCIAL STATEMENTS
- --------------------------------------------------------------------------------

1. ORGANIZATION. The Gabelli Mathers Fund (the "Fund") was organized on June 17,
1999 as a Delaware business trust. The Fund commenced  investment  operations on
October 1, 1999 as the successor to the Mathers Fund,  Inc. (the "Mathers Fund")
which was  organized  on March 31, 1965 as a Maryland  corporation.  The Mathers
Fund  commenced  investment  operations  on  August  19,  1965.  The  Fund  is a
non-diversified,  open-end  management  investment  company registered under the
Investment  Company Act of 1940,  as amended  (the  "Act").  The Fund's  primary
objective is long term capital appreciation.

2. SIGNIFICANT  ACCOUNTING POLICIES.  The preparation of financial statements in
accordance with generally accepted accounting  principles requires management to
make estimates and assumptions  that affect the reported amounts and disclosures
in the financial  statements.  Actual results could differ from those estimates.
The following is a summary of significant  accounting  policies  followed by the
Fund in the preparation of its financial statements.

SECURITY  VALUATION.  Portfolio  securities  listed or  traded  on a  nationally
recognized securities exchange, quoted by the National Association of Securities
Dealers Automated Quotations, Inc. ("Nasdaq") or traded on foreign exchanges are
valued at the last sale price on that  exchange  as of the close of  business on
the day the  securities  are being  valued (if there were no sales that day, the
security is valued at the  average of the  closing  bid and asked  prices or, if
there were no asked  prices  quoted on that day,  then the security is valued at
the closing bid price on that day,  except for open short  positions,  which are
valued at the last  asked  price).  All  other  portfolio  securities  for which
over-the-counter  market  quotations  are  readily  available  are valued at the
latest average of the bid and asked prices.  Portfolio securities traded on more
than one  national  securities  exchange or market are valued  according  to the
broadest and most  representative  market,  as determined by Gabelli Funds,  LLC
(the  "Adviser").  Securities  and assets for which  market  quotations  are not
readily  available  are valued at their fair value as  determined  in good faith
under procedures  established by and under the general  supervision of the Board
of Trustees.  Short term debt securities with remaining maturities of 60 days or
less are valued at amortized cost,  unless the Trustees  determine such does not
reflect the  securities'  fair  value,  in which case these  securities  will be
valued at their fair  value as  determined  by the  Trustees.  Debt  instruments
having a  maturity  greater  than 60 days are  valued at the  highest  bid price
obtained from a dealer maintaining an active market in those securities.

REPURCHASE  AGREEMENTS.  The Fund may  enter  into  repurchase  agreements  with
primary  government  securities dealers recognized by the Federal Reserve Board,
with member banks of the Federal Reserve System or with other brokers or dealers
that meet credit guidelines  established by the Directors.  Under the terms of a
typical  repurchase  agreement,  the Fund takes possession of an underlying debt
obligation subject to an obligation of the seller to repurchase, and the Fund to
resell, the obligation at an agreed-upon price and time, thereby determining the
yield  during  the Fund's  holding  period.  The Fund will  always  receive  and
maintain  securities  as  collateral  whose  market  value,   including  accrued
interest,  will be at least equal to 100% of the dollar  amount  invested by the
Fund in each agreement. The Fund will make payment for such securities only upon
physical  delivery or upon evidence of book entry  transfer of the collateral to
the  account of the  custodian.  To the extent that any  repurchase  transaction
exceeds one business day, the value of the collateral

                                       9
<PAGE>
THE GABELLI MATHERS FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
- --------------------------------------------------------------------------------

is marked-to-market on a daily basis to maintain the adequacy of the collateral.
If the seller defaults and the value of the collateral declines or if bankruptcy
proceedings   are  commenced  with  respect  to  the  seller  of  the  security,
realization of the collateral by the Fund may be delayed or limited.

FUTURES  CONTRACTS.  The Fund may engage in futures contracts for the purpose of
hedging  against  changes in the value of its  portfolio  securities  and in the
value of  securities  it  intends  to  purchase.  Upon  entering  into a futures
contract,  the Fund is required to deposit  with the broker an amount of cash or
cash equivalents equal to a certain  percentage of the contract amount.  This is
known as the "initial margin." Subsequent payments ("variation margin") are made
or  received by the Fund each day,  depending  on the daily  fluctuation  of the
value of the  contract.  The daily  changes  in the  contract  are  included  in
unrealized gains or losses. The Fund recognizes a realized gain or loss when the
contract is closed. At December 31, 1999, there were no open futures contracts.

There are several  risks in  connection  with the use of futures  contracts as a
hedging device. The change in value of futures contracts  primarily  corresponds
with the value of their underlying instruments, which may not correlate with the
change in value of the hedged investments.  In addition,  there is the risk that
the Fund may not be able to  enter  into a  closing  transaction  because  of an
illiquid secondary market.

SECURITIES  SOLD SHORT. A short sale involves  selling a security which the Fund
does not own. The proceeds  received for short sales are recorded as liabilities
and the Fund records an unrealized  gain or loss to the extent of the difference
between the proceeds  received  and the value of the open short  position on the
day of  determination.  The Fund records a realized  gain or loss when the short
position is closed out. By entering into a short sale, the Fund bears the market
risk of an unfavorable change in price of the security sold short.  Dividends on
short sales are recorded as an expense by the Fund on the  ex-dividend  date and
interest  expense is recorded on the accrual basis. At December 31, 1999,  there
were no open positions in securities sold short.

SECURITIES  TRANSACTIONS  AND INVESTMENT  INCOME.  Securities  transactions  are
accounted  for on the  trade  date  with  realized  gain or loss on  investments
determined  by using the  identified  cost method.  Interest  income  (including
amortization  of premium  and  accretion  of  discount)  is  recorded as earned.
Dividend income is recorded on the ex-dividend date.

DIVIDENDS AND  DISTRIBUTIONS  TO  SHAREHOLDERS.  Dividends and  distributions to
shareholders  are recorded on the ex-dividend  date.  Income  distributions  and
capital  gain  distributions  are  determined  in  accordance  with  income  tax
regulations  which may differ from  generally  accepted  accounting  principles.
These differences are primarily due to differing  treatments of income and gains
on  various  investment  securities  held by the Fund,  timing  differences  and
differing characterization of distributions made by the Fund.

For the year ended  December 31, 1999,  reclassifications  were made to decrease
accumulated  undistributed  net  investment  income for  $235,813  and  decrease
accumulated net realized loss on investments  and futures  contracts for $11,962
with an offsetting adjustment to additional paid-in capital.

PROVISION  FOR  INCOME  TAXES.  The Fund  intends  to  continue  to qualify as a
regulated  investment company under Subchapter M of the Internal Revenue Code of
1986, as amended. As a result, a Federal income tax provision is not required.

                                       10
<PAGE>
THE GABELLI MATHERS FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
- --------------------------------------------------------------------------------

The Fund has a net capital loss  carryforward for Federal income tax purposes at
December 31, 1999 of $39,220,871. This capital loss carryforward is available to
reduce future distributions of net capital gains to shareholders.  $9,124,017 of
the loss  carryforward  is  available  through  2003;  $22,226,886  is available
through 2004; and $7,869,968 is available through 2006.

3.  INVESTMENT  ADVISORY  AGREEMENT.  The Fund has  entered  into an  investment
advisory  agreement (the "Advisory  Agreement")  with the Adviser which provides
that the Fund will pay the Adviser a fee,  computed  daily and paid monthly,  at
the annual rate of 0.75% of the first  $100,000,000  of the Fund's average daily
net assets  plus  1.00% of average  daily net  assets  over  $100,000,000  until
September  30, 2001.  In  accordance  with the Advisory  Agreement,  the Adviser
provides a continuous investment program for the Fund's portfolio,  oversees the
administration  of all aspects of the Fund's  business  and affairs and pays the
compensation of all Officers and Trustees of the Fund who are its affiliates.

Prior to  October 1, 1999,  Mathers  and  Company,  Inc.  ("Mathers")  served as
investment  adviser and  manager,  which  provided  that the Fund paid Mathers a
management fee of 0.75% of the first  $200,000,000 of the Fund's average monthly
net  assets,  0.625% of average  monthly net assets  over  $200,000,000  but not
exceeding   $500,000,000,   and  0.50%  of  average   monthly  net  assets  over
$500,000,000.  Mathers  was  required to  reimburse  the Fund to the extent that
expenses, other than taxes and dividends on securities sold short, but including
the  management  fee,  in any  year  exceeded  the  sum of  1.50%  of the  first
$30,000,000 of the Fund's average monthly net assets plus 1.00% of such value in
excess of $30,000,000.

4. DISTRIBUTION PLAN. On October 1, 1999, the Fund's Board of Trustees adopted a
distribution  plan (the  "Plan")  pursuant to Rule 12b-1 under the 1940 Act. For
the year ended December 31, 1999, the Fund incurred  distribution  costs payable
to Gabelli & Company, Inc., an affiliate of the Adviser, of $65,081, or 0.06% of
average  daily net assets.  Such  payments are accrued daily and paid monthly at
the annual rate of 0.25% of average daily net assets.

5.  PORTFOLIO  SECURITIES.  Purchases and sales of securities for the year ended
December 31, 1999, other than short term securities, aggregated $183,228,600 and
$151,933,396, respectively.

6.  TRANSACTIONS  WITH AFFILIATES.  During the year ended December 31, 1999, the
Fund paid brokerage commissions of $57,997 to Gabelli & Company, Inc.

7. SHARES OF BENEFICIAL INTEREST.  Transactions in shares of beneficial interest
were as follows:
<TABLE>
<CAPTION>
                                                              YEAR ENDED                         YEAR ENDED
                                                           DECEMBER 31, 1999                  DECEMBER 31, 1998
                                                           -----------------                  -----------------
                                                        SHARES           AMOUNT          SHARES           AMOUNT
                                                        ------           ------          ------           ------
<S>                                                   <C>             <C>                 <C>          <C>
Shares sold ........................................  1,778,384       $21,299,727         920,644      $ 11,377,820
Shares issued upon reinvestment of dividends .......    274,885         3,271,129         423,392         4,966,387
Shares redeemed .................................... (2,536,839)      (30,532,310)     (2,686,199)      (34,164,539)
                                                      ---------       -----------       ---------      ------------
    Net decrease ...................................   (483,570)      $(5,961,454)     (1,342,163)     $(17,820,332)
                                                      =========       ===========       =========      ============
</TABLE>

                                       11
<PAGE>
THE GABELLI MATHERS FUND
FINANCIAL HIGHLIGHTS
- --------------------------------------------------------------------------------

Selected data for a share of beneficial  interest  outstanding  throughout  each
period:
<TABLE>
<CAPTION>

                                                                        YEAR ENDED DECEMBER 31,
                                                   --------------------------------------------------------------
                                                     1999(A)     1998          1997          1996         1995
                                                     -------     ----          ----          ----         ----
<S>                                                <C>          <C>           <C>           <C>          <C>
OPERATING PERFORMANCE:
   Net asset value, beginning of period .......    $  11.73     $  13.06      $  13.27      $  13.75     $  13.55
                                                   --------     --------      --------      --------     --------
   Net investment income ......................        0.46         0.58          0.53          0.40         0.60
   Net realized and unrealized gain (loss)
     on investments and securities sold short .        0.21        (1.26)        (0.13)        (0.41)        0.35
                                                   --------     --------      --------      --------     --------
   Total from investment operations ...........        0.67        (0.68)         0.40         (0.01)        0.95
                                                   --------     --------      --------      --------     --------
DISTRIBUTIONS TO SHAREHOLDERS:
   Net investment income ......................       (0.46)       (0.65)        (0.61)        (0.47)       (0.72)
   Net realized gain on investments ...........          --           --            --            --        (0.03)
                                                   --------     --------      --------      --------     --------
   Total distributions ........................       (0.46)       (0.65)        (0.61)        (0.47)       (0.75)
                                                   --------     --------      --------      --------     --------
   NET ASSET VALUE, END OF PERIOD .............    $  11.94     $  11.73      $  13.06      $  13.27     $  13.75
                                                   ========     ========      ========      ========     ========
   Total return+ ..............................       5.73%      (5.21)%         3.01%       (0.07)%        7.01%
                                                   ========     ========      ========      ========     ========
RATIOS TO AVERAGE NET ASSETS AND SUPPLEMENTAL DATA:
   Net assets, end of period (in 000's) .......    $104,693     $108,548      $138,404      $171,596     $232,303
   Ratio of net investment income
     to average net assets ....................       3.50%        4.56%         3.96%         2.96%        4.25%
   Ratio of operating expenses
     to average net assets (b) ................       1.24%        1.16%         1.07%         1.03%        0.98%
   Portfiolio turnover rate ...................        922%          67%           50%           38%          58%
</TABLE>

- --------------------------------
+   Total return  represents  aggregate  total return of a  hypothetical  $1,000
    investment  at the beginning of the period and sold at the end of the period
    including reinvestment of dividends.
(a) Gabelli Funds,  LLC became the investment  adviser of the Fund on October 1,
    1999. (See Note 3)
(b) The Fund incurred  dividend  expense on securities  sold short for the years
    ended  December  31,  1999 and 1998.  If the  dividend  expense had not been
    incurred,  the ratios of operating expenses to average net assets would have
    been 1.24% and 1.12%, respectively.

                 See accompanying notes to financial statements.

                                       12
<PAGE>
THE GABELLI MATHERS FUND
REPORT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS
- --------------------------------------------------------------------------------

To the Shareholders and Board of Trustees of
The Gabelli Mathers Fund

We have  audited the  accompanying  statement of assets and  liabilities  of The
Gabelli Mathers Fund (the "Fund"), including the portfolio of investments, as of
December 31, 1999,  and the related  statements of operations and changes in net
assets and the financial  highlights  for the year then ended.  These  financial
statements  and  financial  highlights  are  the  responsibility  of the  Fund's
management.  Our  responsibility  is to express  an  opinion on these  financial
statements and financial highlights based on our audit. The statement of changes
in net assets for the year ended December 31, 1998 and the financial  highlights
for each of the four  years in the  period  then  ended  were  audited  by other
auditors, whose report dated January 15, 1999 expressed an unqualified opinion.

We conducted our audit in accordance with auditing standards  generally accepted
in the United States. Those standards require that we plan and perform the audit
to obtain  reasonable  assurance  about  whether the  financial  statements  and
financial  highlights  are free of  material  misstatement.  An  audit  includes
examining,  on a test basis,  evidence supporting the amounts and disclosures in
the financial  statements  and financial  highlights.  Our  procedures  included
confirmation of securities owned as of December 31, 1999, by correspondence with
the  custodian  and  other.  An audit also  includes  assessing  the  accounting
principles  used  and  significant  estimates  made  by  management,  as well as
evaluating the overall  financial  statement  presentation.  We believe that our
audit provides a reasonable basis for our opinion.

In our opinion,  the financial statements and financial  highlights,  audited by
us, referred to above present fairly,  in all material  respects,  the financial
position of The Gabelli Mathers Fund as of December 31, 1999, and the results of
its operations,  the changes in its net assets and the financial  highlights for
the year then ended, in conformity with accounting principles generally accepted
in the United States.


                                           /s/ Signature
                                           Ernst & Young LLP

New York, New York
February 11, 2000

- --------------------------------------------------------------------------------
                   1999 TAX NOTICE TO SHAREHOLDERS (Unaudited)

For the fiscal year ended December 31, 1999, the Fund paid to  shareholders,  on
December 27, 1999, an ordinary  income  dividend  (comprised  of net  investment
income)  totaling $0.46 per share.  For the fiscal year ended December 31, 1999,
5.16% of the  ordinary  income  dividend  qualifies  for the  dividend  received
deduction available to corporations.

U.S. GOVERNMENT INCOME:

The  percentage of the ordinary  income  dividend paid by the Fund during fiscal
year 1999 which was derived  from U.S.  Treasury  securities  was  98.20%.  Such
income is exempt from state and local tax in all states.  However,  many states,
including  New York and  California,  allow a tax exemption for a portion of the
income  earned only if a mutual fund has  invested at least 50% of its assets at
the end of each quarter of the Fund's fiscal year in U.S. Government securities.
Due to the  diversity  in state and local tax law,  it is  recommended  that you
consult your  personal tax advisor as to the  applicability  of the  information
provided to your specific situation.
- --------------------------------------------------------------------------------

                                       13
<PAGE>

                      [This page intentionally left blank]

                                       14
<PAGE>
- --------------------------------------------------------------------------------
                             GABELLI FAMILY OF FUNDS
- --------------------------------------------------------------------------------

GABELLI ASSET FUND--------------------------------------------------------------
Seeks to invest primarily in a diversified portfolio of common stocks selling at
significant  discounts  to  their  private  market  value.  The  Fund's  primary
objective is growth of capital.  (NO-LOAD)
                                        PORTFOLIO MANAGER: MARIO J. GABELLI, CFA

GABELLI GROWTH FUND-------------------------------------------------------------
Seeks to invest  primarily in large cap stocks believed to have  favorable,  yet
undervalued,  prospects for earnings  growth.  The Fund's  primary  objective is
capital appreciation. (NO-LOAD)
                                          PORTFOLIO MANAGER: HOWARD F. WARD, CFA

GABELLI WESTWOOD EQUITY FUND----------------------------------------------------
Seeks to invest primarily in the common stock of seasoned  companies believed to
have proven records and above average  historical  earnings  growth.  The Fund's
primary objective is capital appreciation. (NO-LOAD)
                                               PORTFOLIO MANAGER: SUSAN M. BYRNE

GABELLI SMALL CAP GROWTH FUND---------------------------------------------------
Seeks  to  invest  primarily  in  common  stock  of  smaller  companies  (market
capitalizations  less than $500  million)  believed  to have rapid  revenue  and
earnings growth potential. The Fund's primary objective is capital appreciation.
(NO-LOAD)
                                        PORTFOLIO MANAGER: MARIO J. GABELLI, CFA

GABELLI BLUE CHIP VALUE FUND----------------------------------------------------
Seeks  long-term  growth of capital through  investment  primarily in the common
stocks  of   well-established,   high   quality   companies   that  have  market
capitalizations of greater than $5 billion. (NO-LOAD)
                                         PORTFOLIO MANAGER:  BARBARA MARCIN, CFA

GABELLI WESTWOOD SMALLCAP EQUITY FUND-------------------------------------------
Seeks to invest primarily in smaller  capitalization  equity securities - market
caps of $1 billion or less.  The Fund's primary  objective is long-term  capital
appreciation. (NO-LOAD)
                                            PORTFOLIO MANAGER: LYNDA CALKIN, CFA

GABELLI WESTWOOD INTERMEDIATE BOND FUND-----------------------------------------
Seeks to invest in a diversified portfolio of bonds with various maturities. The
Fund's primary objective is total return. (NO-LOAD)
                                               PORTFOLIO MANAGER: PATRICIA FRAZE

GABELLI EQUITY INCOME FUND------------------------------------------------------
Seeks to invest primarily in equity securities with above market average yields.
The Fund pays quarterly dividends and seeks a high level of total return with an
emphasis on income. (NO-LOAD)
                                        PORTFOLIO MANAGER: MARIO J. GABELLI, CFA

GABELLI WESTWOOD BALANCED FUND--------------------------------------------------
Seeks to invest in a balanced and diversified portfolio of stocks and bonds. The
Fund's  primary  objective  is both  capital  appreciation  and current  income.
(NO-LOAD)
                             PORTFOLIO MANAGERS: SUSAN M. BYRNE & PATRICIA FRAZE

GABELLI WESTWOOD MIGHTY MITES[SERVICE MARK] FUND--------------------------------
Seeks to invest in micro-cap companies that have market  capitalizations of $300
million or less. The Fund's primary objective is long-term capital appreciation.
(NO-LOAD)
                                            TEAM MANAGED: MARIO J. GABELLI, CFA,
                                           MARC J. GABELLI, LAURA K. LINEHAN AND
                                                                 WALTER K. WALSH

GABELLI VALUE FUND--------------------------------------------------------------
Seeks to invest in  securities  of  companies  believed to be  undervalued.  The
Fund's primary objective is long-term capital  appreciation.  MAX. SALES CHARGE:
5 1/2%
                                        PORTFOLIO MANAGER: MARIO J. GABELLI, CFA

GABELLI UTILITIES FUND----------------------------------------------------------
Seeks to provide a high level of total return  through a combination  of capital
appreciation and current income.  (NO-LOAD)
                                         PORTFOLIO MANAGER: TIMOTHY O'BRIEN, CFA

GABELLI ABC FUND----------------------------------------------------------------
Seeks to invest in securities with attractive  opportunities for appreciation or
investment  income.  The Fund's  primary  objective  is total  return in various
market conditions without excessive risk of capital loss. (NO-LOAD)
                                        PORTFOLIO MANAGER: MARIO J. GABELLI, CFA

GABELLI MATHERS FUND------------------------------------------------------------
Seeks  long-term  capital  appreciation  in various  market  conditions  without
excessive risk of capital loss. (NO-LOAD)
                                        PORTFOLIO MANAGER: HENRY VAN DER EB, CFA

GABELLI U.S. TREASURY MONEY MARKET FUND-----------------------------------------
Seeks to invest exclusively in short-term U.S. Treasury  securities.  The Fund's
primary  objective  is to  provide  high  current  income  consistent  with  the
preservation of principal and liquidity.  (NO-LOAD)
                                             PORTFOLIO MANAGER: JUDITH A. RANERI

GABELLI CASH MANAGEMENT SHARES OF
THE TREASURER'S FUND------------------------------------------------------------
Three money market  portfolios  designed to generate  superior  returns  without
compromising  portfolio  safety.  U.S.  Treasury Money Market seeks to invest in
U.S. Treasury bills, notes and bonds. Tax Exempt Money Market seeks to invest in
municipal  securities.  Domestic  Prime  Money  Market  seeks to invest in prime
quality, domestic money market instruments. (NO-LOAD)
                                             PORTFOLIO MANAGER: JUDITH A. RANERI


AN INVESTMENT IN THE ABOVE MONEY MARKET FUNDS IS NEITHER  INSURED NOR GUARANTEED
BY THE FEDERAL DEPOSIT INSURANCE CORPORATION OR ANY GOVERNMENT AGENCY.  ALTHOUGH
THE FUNDS SEEK TO PRESERVE THE VALUE OF YOUR  INVESTMENT AT $1.00 PER SHARE,  IT
IS POSSIBLE TO LOSE MONEY BY INVESTING IN THE FUNDS.

GLOBAL SERIES

  GABELLI GLOBAL TELECOMMUNICATIONS FUND
  Seeks  to  invest  in  telecommunications  companies  throughout  the  world -
  targeting  undervalued  companies with strong earnings and cash flow dynamics.
  The Fund's primary objective is capital appreciation. (NO-LOAD)
                                            TEAM MANAGED: MARIO J. GABELLI, CFA,
                                           MARC J. GABELLI AND IVAN ARTEAGA, CFA

  GABELLI  GLOBAL  CONVERTIBLE  SECURITIES  FUND
  Seeks  to  invest   principally  in  bonds  and  preferred  stocks  which  are
  convertible  into common stock of foreign and domestic  companies.  The Fund's
  primary  objective is total return through a combination of current income and
  capital appreciation. (NO-LOAD)
                                                 PORTFOLIO MANAGER: HART WOODSON

  GABELLI GLOBAL GROWTH FUND
  Seeks capital appreciation  through a disciplined  investment program focusing
  on the globalization and  interactivity of the world's  marketplace.  The Fund
  invests in  companies  at the  forefront  of  accelerated  growth.  The Fund's
  primary objective is capital appreciation. (NO-LOAD)
                                              PORTFOLIO MANAGER: MARC J. GABELLI

  GABELLI GLOBAL OPPORTUNITY FUND
  Seeks to  invest in common  stock of  companies  which  have  rapid  growth in
  revenues and earnings and potential for above average capital  appreciation or
  are  undervalued.  The  Fund's  primary  objective  is  capital  appreciation.
  (NO-LOAD)
                                             PORTFOLIO MANAGERS: MARC J. GABELLI
                                                                AND CAESAR BRYAN

GABELLI GOLD FUND---------------------------------------------------------------
Seeks to invest in a global  portfolio of equity  securities  of gold mining and
related  companies.  The Fund's  objective  is long-term  capital  appreciation.
Investment in gold stocks is considered speculative and is affected by a variety
of world-wide economic, financial and political factors. (NO-LOAD)
                                                 PORTFOLIO MANAGER: CAESAR BRYAN

GABELLI INTERNATIONAL GROWTH FUND-----------------------------------------------
Seeks to invest in the equity  securities  of  foreign  issuers  with  long-term
capital   appreciation    potential.    The   Fund   offers   investors   global
diversification. (NO-LOAD)
                                                PORTFOLIO MANAGER:  CAESAR BRYAN

THE SIX FUNDS  ABOVE  INVEST IN  FOREIGN  SECURITIES  WHICH  INVOLVES  RISKS NOT
ORDINARILY  ASSOCIATED WITH INVESTMENTS IN DOMESTIC ISSUES,  INCLUDING  CURRENCY
FLUCTUATION,   ECONOMIC  AND  POLITICAL   RISKS.  THE  FUNDS  LISTED  ABOVE  ARE
DISTRIBUTED BY GABELLI & COMPANY, INC.
- --------------------------------------------------------------------------------

           TO RECEIVE A PROSPECTUS, CALL 1-800-GABELLI (422-3554). THE
            PROSPECTUS GIVES A MORE COMPLETE DESCRIPTION OF THE FUND,
           INCLUDING FEES AND EXPENSES. READ THE PROSPECTUS CAREFULLY
                        BEFORE YOU INVEST OR SEND MONEY.
                              VISIT OUR WEBSITE AT:

                                 WWW.GABELLI.COM
                                    OR, CALL:
                                  1-800-GABELLI
                  1-800-422-3554 [BULLET] 914-921-5100 [BULLET]
                  FAX: 914-921-5118 [BULLET] [email protected]
                    ONE CORPORATE CENTER, RYE, NEW YORK 10580
<PAGE>
                            THE GABELLI MATHERS FUND
                              One Corporate Center
                            Rye, New York 10580-1434
                                  1-800-GABELLI
                                [1-800-422-3554]
                               FAX: 1-914-921-5118
                             HTTP://WWW.GABELLI.COM
                            E-MAIL: [email protected]
                (Net Asset Value may be obtained daily by calling
                         1-800-GABELLI AFTER 6:00 P.M.)


                                BOARD OF TRUSTEES

Mario J. Gabelli, CFA                          Karl Otto Pohl
CHAIRMAN AND CHIEF                             FORMER PRESIDENT
INVESTMENT OFFICER                             DEUTSCHE BUNDESBANK
GABELLI ASSET MANAGEMENT INC.

Felix J. Christiana                            Anthony R. Pustorino
FORMER SENIOR VICE PRESIDENT                   CERTIFIED PUBLIC ACCOUNTANT
DOLLAR DRY DOCK SAVINGS BANK                   PROFESSOR, PACE UNIVERSITY

Anthony J. Colavita                            Werner J. Roeder, MD
ATTORNEY-AT-LAW                                MEDICAL DIRECTOR
ANTHONY J. COLAVITA, P.C.                      LAWRENCE HOSPITAL

Vincent D. Enright                             Jack O. Vance
FORMER SENIOR VICE PRESIDENT                   MANAGING DIRECTOR
AND CHIEF FINANCIAL OFFICER                    MANAGEMENT RESEARCH INC.
KEYSPAN ENERGY CORP.

Jon P. Hedrich                                 Henry G. Van der Eb, CFA
FORMER PRESIDENT AND PARTNER                   PRESIDENT AND CHIEF
STEINER DIAMOND INSTITUTIONAL                  EXECUTIVE OFFICER
SERVICES                                       THE GABELLI MATHERS FUND

Robert E. Kohnen                               Anthonie C. van Ekris
FORMER VICE PRESIDENT AND                      MANAGING DIRECTOR
INVESTMENT MANAGER                             BALMAC INTERNATIONAL, INC.
PROTECTION MUTUAL INSURANCE




























                         OFFICERS AND PORTFOLIO MANAGERS

          Henry G. Van der Eb, CFA          Anne E. Morrissy, CFA
          PRESIDENT AND                     EXECUTIVE VICE PRESIDENT
          PORTFOLIO MANAGER

          Bruce N. Alpert                   James E. McKee
          EXECUTIVE VICE PRESIDENT          SECRETARY
          AND TREASURER






                                   DISTRIBUTOR
                             Gabelli & Company, Inc.

                  CUSTODIAN, TRANSFER AGENT AND DIVIDEND AGENT
                       State Street Bank and Trust Company

                                  LEGAL COUNSEL
                    Skadden, Arps, Slate, Meagher & Flom LLP

- --------------------------------------------------------------------------------
This report is submitted for the general  information of the shareholders of The
Gabelli  Mathers Fund. It is not  authorized  for  distribution  to  prospective
investors unless preceded or accompanied by an effective prospectus.
- --------------------------------------------------------------------------------

GAB1726Q499SR
                                             [Photo of Mario J. Gabelli omitted]
THE
GABELLI
MATHERS
FUND
                                                                   ANNUAL REPORT
                                                               DECEMBER 31, 1999


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