SPECTRA FUND INC
485APOS, 2000-05-08
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              As filed with the Securities and Exchange Commission
                                 on May 8, 2000




                        Securities Act File No. 33-98102
                    Investment Company Act File No. 811-1743

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington D. C. 20549

                                                                      ---
         REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933           x
                                                                          ---

                                                                          ---
                         Post-Effective Amendment No. 7                    x
                                                                          ---


                                     and/or
                                                                          ---
       REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940     x
                                                                          ---


                                                                          ---
                               Amendment No. 20                            x
                                                                      ---
                        (Check appropriate box or boxes)



                                  SPECTRA FUND
- --------------------------------------------------------------------------------
               (Exact Name of Registrant as Specified in Charter)


           ONE WORLD TRADE CENTER, SUITE 9333
           NEW YORK, NEW YORK                                      10048
- --------------------------------------------------------------------------------
(Address of Principal Executive Offices)                         (Zip Code)

Registrant's Telephone Number, including Area Code:            212-806-8800


                               MR. GREGORY S. DUCH
                           FRED ALGER MANAGEMENT, INC.
                       ONE WORLD TRADE CENTER, SUITE 9333
                               NEW YORK, NY 10048
- -------------------------------------------------------------------------------
                     (Name and Address of Agent for Service)


<PAGE>


It is proposed that this filing will become effective (check appropriate box):



- ---       immediately upon filing pursuant to paragraph (b), or

- ---       on [date] pursuant to paragraph (b), or
X
- ---       60 days after filing pursuant to paragraph (a), or

- ---       on April 28, 2000 pursuant to paragraph (a)(2) of Rule 485

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


                                  SPECTRA FUND

                                   FORM N-1A

                             CROSS REFERENCE SHEET

<TABLE>
<CAPTION>
PART A
ITEM NO.                                                               PROSPECTUS HEADING
- --------                                                               ------------------
<S>      <C>                                                           <C>
1.       Front and Back Cover Pages ...........................        Front and Back Cover Pages

2.       Risk/Return Summary: Investments, Risks and
           Performance ........................................        Risk/Return Summary:
                                                                       Investments, Risks & Performance

3.       Risk/Return Summary: Fee Table .......................        Fees and Expenses

4.       Investment Objectives, Principal Investment
           Strategies, and Related Risks ......................        Additional Information About
                                                                       the Fund's Investments

5.       Management's Discussion of Fund Performance...........        Not Applicable

6.       Management, Organization, and Capital Structure ......        Management & Organization

7.       Shareholder Information ..............................        Shareholder Information;
                                                                       Purchasing and Redeeming Fund Shares

8.       Distribution Arrangements ............................        Purchasing and Redeeming Fund Shares

9.       Financial Highlights Information .....................        Financial Highlights


PART B                                                                 HEADING IN STATEMENT OF
ITEM NO.                                                               ADDITIONAL INFORMATION
- --------                                                               ----------------------
10.      Front Cover Page .....................................        Front Cover Page
</TABLE>

<PAGE>

<TABLE>
<CAPTION>
<S>      <C>                                                           <C>
11.      Fund History .........................................        Organization

12.      Description of the Fund and Its Investments
           and Risks ..........................................        Investment Strategies and Policies;
                                                                       Appendix

13.      Management of the Fund ...............................        Management

14.      Control Persons and Principal Holders of
           Securities .........................................        Certain Shareholders

15.      Investment Advisory and Other Services ...............        Management; Custodian and Transfer
                                                                       Agent; Purchases and Redemptions;
                                                                       See in the Prospectus
                                                                       Management & Organization

16.      Brokerage Allocation and Other Practices .............        Investment Strategies and Policies

17.      Capital Stock and Other Securities ...................        Organization; See in the Prospectus
                                                                       Management & Organization;
                                                                       Shareholder Information; Purchasing
                                                                       & Redeeming Fund Shares

18.      Purchase, Redemption and Pricing of Secu-
         rities Being Offered .................................        Net Asset Value; Purchases and Redemptions

19.      Taxation of the Fund .................................        Taxes; See in the Prospectus "Shareholder Information"

20.      Underwriters .........................................        Purchases and Redemptions

21.      Calculation of Performance Data ......................        Determination of Performance; See
                                                                       in the Prospectus "Performance"

22.      Financial Statements .................................        Financial Statements

</TABLE>

PART C

         Information  required  to be  included in Part C is set forth under the
appropriate item, so numbered, in Part C to this Registration Statement.

<PAGE>


      SPECTRA FUND

            CLASS A SHARES



                                                                      PROSPECTUS
                                                                   JULY   , 2000


TABLE OF CONTENTS

2 ..............  Risk/Return Summary: Investments, Risks & Performance

3 ..............  Fees & Expenses

4 ..............  Additional Information About
                  the Fund's Investments

4 ..............  Management & Organization

4 ..............  Shareholder Information

5 ..............  Purchasing and Redeeming
                  Fund Shares

6 ..............  Investment Instructions


8 ..............  Financial Highlights


Back Cover .....  How to obtain more information

<PAGE>


[GRAPHIC OMITTED]

RISK/RETURN SUMMARY: INVESTMENTS,
RISKS & PERFORMANCE

INVESTMENT GOAL AND APPROACH

THE FUND SEEKS LONG-TERM CAPITAL APPRECIATION.

It invests primarily in equity  securities,  such as common or preferred stocks,
which are listed on U.S. exchanges or in the  over-the-counter  market. The Fund
invests primarily in "growth" stocks. The Fund's Manager, Fred Alger Management,
Inc., believes that these companies tend to fall into one of two categories:

o  High Unit Volume Growth

   Vital,  creative  companies  which  offer  goods  or  services  to a  rapidly
   expanding  marketplace.  They include both  established  and emerging  firms,
   offering new or improved  products,  or firms simply  fulfilling an increased
   demand for an existing line.

o  Positive Life Cycle Change

   Companies   experiencing   a  major  change  which  is  expected  to  produce
   advantageous  results.  These  changes  may be as varied  as new  management,
   products or  technologies;  restructuring  or  reorganization;  or merger and
   acquisition.

The Fund can leverage,  that is, borrow money, to buy additional  securities for
its portfolio.  By borrowing  money,  the Fund has the potential to increase its
returns if the  increase in the value of the  securities  purchased  exceeds the
cost of borrowing, including interest paid on the money borrowed.

PRINCIPAL RISKS

The main risks in investing in the Fund are:



o  fluctuation  in Fund price per share due to  changes in the market  prices of
   its investments

o  the tendency of stocks,  especially "growth" stocks, to be more volatile than
   some other investments you could make, such as bonds

o  the risk that the cost of borrowing money to leverage will exceed the returns
   for the securities purchased or that the securities purchased may actually go
   down in value;  thus,  the Fund's net asset value could decrease more quickly
   than if it had not borrowed

Prices  of growth  stocks  tend to be higher  in  relation  to their  companies'
earnings,  and  may  be  more  sensitive  to  market,   political  and  economic
developments than other stocks, making their prices more volatile.

The Fund's trading in some stocks may be relatively short-term, meaning that the
Fund may buy a  security  and sell it a short time  later to take  advantage  of
current  gains if it is  believed  that an  alternative  investment  may provide
greater future growth.  This activity may create higher transaction costs due to
commissions and other expenses.  In addition, a high level of short-term trading
may increase the Fund's realized gains, thereby increasing the amount of taxable
distributions to shareholders at the end of the year.

As with any equity fund, your  investment  will go up or down in value,  and the
loss of your investment is a risk of investing.  Based on the Fund's  investment
objective, an investment in the Fund may be better suited for investors who seek
long-term  capital growth and can tolerate  fluctuations  in their  investment's
value.

PERFORMANCE


The following bar chart shows the changes in the Fund's performance from year to
year and gives you some  indication  of the risks of investing in the Fund.  The
Fund offers two  classes of shares,  Class N shares,  which are offered  through
another  prospectus and Class A shares. The table beneath it compares the Fund's
performance over several periods with a broad measure of market performance. The
total returns reflect reinvest-


2
<PAGE>


ment of dividends and  distributions.*  Remember that the Fund's  performance in
the past is not necessarily an indication of how it will perform in the future.



Information in the chart and table is for the Fund's Class N shares,  which were
the only shares outstanding during the periods shown.

Class A and Class N shares  differ  only in that Class A shares are subject to a
front-end  sales  charge;  Class N shares are not.  Because of the sales charge,
returns on your total purchase of Class A shares (as shown in the average annual
total returns table,  which reflect any sales loads) would have been lower, even
though the annual  total return per share (as shown in the bar chart) would have
been the same as for Class N shares.


- ----------

* Dividends  and  distributions  paid prior to February 12, 1996,  when the Fund
converted from a closed-end fund, are reflected as reinvested at market value.


================================================================================
Annual Total Return as of December 31 each year (%)*


  2.81   57.30    8.49   27.56    3.66   47.69   19.48   24.69   47.94   71.94
- --------------------------------------------------------------------------------
    90      91      92      93      94      95      96      97      98      99
================================================================================

Best Quarter:       Q4 1999        +44.34%
Worst Quarter:      Q3 1990       - 19.18%
================================================================================


* The Fund's calendar  year-to-date  total return for the period from January 1,
2000 through March 31, 2000 was 11.61%.


The following table compares the Fund's  performance with that of the S&P(R) 500
Index.


================================================================================
Average Annual Total Return as of December 31, 1999

                        1 Year        5 Years      10 Years       20 Years
- --------------------------------------------------------------------------------
Class N                 71.94%        41.12%        29.22%         23.73%
S&P 500 Index           21.04%        28.56%        18.21%         17.89%
================================================================================


                          ======================================================
                                             S&P 500 INDEX IS AN UNMANAGED INDEX
                                 COMPOSED OF 500 LARGE COMPANY STOCKS. INVESTORS
                                 CANNOT MAKE INVESTMENTS DIRECTLY INTO AN INDEX.
                                THE INDEX DOES NOT REFLECT ANY EXPENSES OR FEES.
                          ======================================================



[GRAPHIC OMITTED]


FEES AND EXPENSES

Investors  incur certain fees and expenses in  connection  with an investment in
the Fund.  The table below shows the fees and expenses that you may incur if you
buy and hold Class A shares of the Fund.

================================================================================
Shareholder Fees
(fees paid directly from your investment)                                4.75%*

Annual Fund Operating Expenses
(expenses that are deducted from Fund Assets)
     Management Fees                                                     1.50%
     Shareholder Servicing Fee                                            .25%
     Other Expenses                                                      0.35%
                                                                         -----
Total Annual Fund Operation Expenses                                     2.10%
                                                                         -----
================================================================================

* Maximum sales charge imposed on purchases (as a percentage of offering price)

EXAMPLE


The example  below is intended to help you compare the cost of  investing in the
Fund with the cost of investing in other mutual funds.


The example  assumes  that you invest  $10,000 in Class A shares of the Fund for
the time periods indicated.  The example also assumes that your investment has a
5% return each year and that the Fund's operating expenses remain the same as in
the table  above.  The  figures  shown  would be the same  whether you sold your
shares at the end of each period or kept them. Although your actual costs may be
higher or lower, based on these assumptions your costs would be:

================================================================================
                     1 Year          3 Years          5 Years           10 Years
- --------------------------------------------------------------------------------
Class A              $  654           $1,029           $1,428           $2,541
================================================================================


                                                                               3
<PAGE>



The Fund pays its Distributor, Fred Alger & Company, Incorporated, a shareholder
servicing  fee of .25% of the value of the Fund's  average  daily net assets for
service and maintenance of shareholder accounts. The Distributor may pay some of
this fee to other  organizations  that also provide servicing and maintenance of
shareholder accounts.


ADDITIONAL INFORMATION ABOUT
THE FUND'S INVESTMENTS

The  Fund  may  invest  up to 100% of its  assets  in  cash,  commercial  paper,
high-grade  bonds, or cash  equivalents for temporary  defensive  reasons if the
Manager  believes that adverse market or other  conditions  warrant.  This is to
attempt to protect the Fund's assets from a temporary unacceptable risk of loss,
rather than directly to promote the Fund's investment objective.

Other securities the Fund may invest in are discussed in the Fund's Statement of
Additional Information (see back cover).

[GRAPHIC OMITTED]

MANAGEMENT AND ORGANIZATION

MANAGER
Fred Alger Management, Inc.
One World Trade Center
Suite 9333
New York, NY 10048


The Manager has been an investment  adviser since 1964, and manages  investments
totaling  (at  6/30/00) $ billion in mutual  fund assets as well as $ billion in
other  assets.  The  Manager  makes  investment   decisions  for  the  Fund  and
continuously  reviews  and  administers  the Fund's  investment  program.  These
management   responsibilities  are  subject  to  the  Fund's  Board  ofTrustees'
supervision.  The Fund has had the same Manager since 1974, and pays the Manager
a fee at an annual rate of 1.50% of its average daily net assets.


PORTFOLIO MANAGERS

David Alger and David Hyun are the  individuals  responsible  for the day-to-day
management of the Fund's  portfolio and have served in that capacity  since 1974
and 1998, respectively. Mr. Alger, has been employed by the Manager as Executive
Vice President and Director of Research since 1971, and as President since 1995.
Mr.  Hyun has been  employed  by the  Manager as an Analyst  since 1991 and as a
Senior Vice President and co-manager since 1998.

[GRAPHIC OMITTED]
                         SHAREHOLDER
                         INFORMATION

                         DISTRIBUTOR
                         Fred Alger & Company, Incorporated
                         30 Montgomery Street
                         Jersey City, New Jersey 07302

                         TRANSFER AGENT
                         Alger Shareholder Services, Inc.
                         30 Montgomery Street
                         Jersey City, New Jersey 07302


NET ASSET VALUE

The  price of one  Class A share  is its "net  asset  value",  or NAV,  plus the
front-end  sales  charge.  The NAV is  calculated  as of the  close of  business
(normally 4:00 p.m. Eastern time) every day the New York Stock Exchange is open.
Generally,  the Exchange is closed on weekends and various national holidays. It
may close on other days from time to time.


The Fund generally  values its assets on the basis of market  quotations.  Where
market  quotations  are not readily  available,  the Manager  makes a good faith
determination on the basis of fair value,  under procedures adopted by the Board
of Trustees.

4
<PAGE>


DIVIDENDS AND DISTRIBUTIONS

Dividends  of the Fund's net  investment  income  and  distributions  of its net
realized  capital  gains are  declared and paid  annually by the Fund.  The Fund
expects that these annual  payments to  shareholders  will consist  primarily of
capital gains, which may be taxable to you at different rates depending upon how
long the Fund held the securities  that it sold to create the gains.  Unless you
choose to receive  cash  payments by checking  the  appropriate  box on your New
Account  Application,   any  dividends  and  distributions  will  be  reinvested
automatically  at the NAV on  their  payment  dates.  If you  have  chosen  cash
payments  and a payment is returned to the Fund as  undeliverable,  upon receipt
that payment will be reinvested  in Fund shares at the next NAV. All  subsequent
payments will be reinvested until you reinstate your cash election and provide a
valid mailing address.

Regardless of whether you choose to take  distributions in cash or reinvest them
in the Fund, they may be subject to federal and state taxes.  Because everyone's
tax situation is unique,  see a tax advisor about  federal,  state and local tax
consequences of investing in the Fund.

=======================================================
            NAV (NET ASSET VALUE) IS COMPUTED BY ADDING
      TOGETHER THE VALUE OF THE PORTFOLIO'S INVESTMENTS
PLUS CASH AND OTHER ASSETS, SUBTRACTING ITS LIABILITIES
          AND THEN DIVIDING THE RESULT BY THE NUMBER OF
                                ITS OUTSTANDING SHARES.
=======================================================

CLASSES OF FUND SHARES


The Fund offers two classes of shares. Class A shares are subject to a front-end
sales charge and are available  only through  authorized  broker  dealers.  Only
Class A shares are offered in this prospectus. Class N shares are not subject to
a front-end  sales charge and can be purchased (i) directly from the Fund,  (ii)
through  investment  advisers and other  professionals who offer "wrap programs"
i.e.,  investment  portfolio  services  for a fee,  and (iii)  through  discount
brokers and other financial intermediaries that offer transaction processing and
account maintenance  facilities related to varied menus of mutual funds and fund
families.  For more  information  about  Class N shares  contact  the Fund.  The
following chart  indicates the sales charge you may pay when purchasing  Class A
shares:

================================================================================
PURCHASE                 SALES CHARGE        SALES CHARGE       DEALER ALLOWANCE
AMOUNT                   as a % of           as a % of          as a % of
                         Offering Price      Net Asset Value    Offering Price
- --------------------------------------------------------------------------------
  Less than $100,000          4.75%               4.99%               4.00%
  $100,000 - $249,999         4.00%               4.17%               3.25%
  $250,000 - $499,999         3.00%               3.09%               2.50%
  $500,000 - $999,999         2.25%               2.30%               1.75%
  $1,000,000 and over           *                   *                 1.00%
================================================================================

*  These  purchases  may be made at net asset value  without  any initial  sales
   charge,  but will be subject to a CDSC of 1.00% on redemptions made within 12
   months of purchase.

   Purchases of Class A shares which,  when  combined  with current  holdings of
   Class A shares offered with a sales charge, equal or exceed $1,000,000 in the
   aggregate, may be made at net asset value without any front-end sales charge.
   However,  these shares will be subject to a contingent  deferred sales charge
   (CDSC) if redeemed within 12 months of purchase. In calculating the CDSC, the
   Fund assumes that any shares not subject to a CDSC are redeemed first.

   Class A share front-end sales charges may be waived in certain circumstances,
   which are discussed in the Statement of Additional Information.

PURCHASING AND REDEEMING CLASS A SHARES

You can  purchase  or redeem  some or all of your shares on any day the New York
Stock  Exchange  is open.  They will be  processed  at the  offering  price next
calculated  after your purchase request or at the NAV next calculated after your
redemption request is received in good order by the Transfer Agent.  Ordinarily,
your redemption check will be issued within 7 days after your redemption request
is accepted by the Transfer  Agent.  However,  when you  purchase  shares with a
check or via TelePurchase or Automatic  Investment Plan, no check will be issued
against  those  funds for 15 days.  The  Transfer  Agent or Fund may  reject any
purchase order.  The Fund does not impose a sales charge for  redemptions  other
than redemptions of Class A shares that were purchased without a sales charge in
connection  with a  purchase  of $1  million  or more and held for less  than 12
months.


You may  aggregate  all the Class A shares you  purchase in the Fund in order to
obtain a reduced  sales charge (as  indicated  above) if you provide  sufficient
information at the time of purchase for verification of your eligibility for the
lower charge.

                                                                               5
<PAGE>



If you intend to make an aggregate purchase of $100,000 or more over a period of
13 months or less,  you can  complete  a letter of intent  and  return it to the
Fund.  Please  contact the Fund or consult your broker dealer for details before
you buy the shares.

Purchases sent directly to the Fund will be invested in Class N shares.

Class A shares are available only through authorized broker dealers. To purchase
or redeem Class A shares, simply call your broker dealer.

================================================================================
MINIMUM INVESTMENTS
                                          Initial                   Subsequent
                                         Investment                 Investment
- --------------------------------------------------------------------------------
Regular account                            $1,000                      $100
Traditional IRA                              $250                      $100
Roth IRA                                     $250                      $100
Education IRA                                $100                      $100
SIMPLE IRA                                   $250                      $100
Keogh                                        $250                      $100
401(k)                                       $250                      $100
403(b)                                       $250                      $100
Automatic Investment                          $25                       $25
================================================================================


Unless your account is a Spectra-sponsored  tax-deferred  retirement plan, if it
falls below $500 because of  redemptions,  the Fund may send you written  notice
providing 60 days to restore it to the minimum balance.  After 60 days, the Fund
may close your account and redeem all of your shares.

Under unusual circumstances,  the Fund may redeem some of your shares "in kind",
which means that some of the proceeds will be paid with securities the Fund owns
instead of cash.

Shares may be worth more or less when you redeem  them than they are at the time
you buy them.  This means that you may  realize a taxable  gain or loss when you
redeem shares.

EXCHANGES

You can exchange  shares of the Fund for shares of Alger Money Market  Portfolio
of The Alger Fund, another portfolio advised by the Manager. If you would like a
prospectus describing the Money Market Portfolio,  please call the Fund at (800)
711-6141. Remember that for tax purposes, an exchange is considered a sale and a
purchase. Thus, you may realize a taxable gain or loss when you exchange shares.




6
<PAGE>




                      (This Page Intentionally Left Blank)





                                       7
<PAGE>


[GRAPHIC OMITTED]


FINANCIAL HIGHLIGHTS

The Financial  Highlights  table is intended to help you  understand  the Fund's
financial  performance  for the periods  shown.  The Fund was a closed-end  fund
until February 12, 1996, when it became an open-end investment company.  Certain
information  reflects  financial  results  for a single  Fund  share.  The total
returns in the table  represent  the rate that an investor  would have earned or
lost on an investment in the Fund  (assuming  reinvestment  of all dividends and
distributions).

The  Financial  Highlights  for the fiscal  periods  ended June 30, 1991 through
October  31,  1999  have  been  audited  by  Arthur  Andersen  LLP,  the  Fund's
independent public accountants.  The Financial Highlights, with the exception of
the total  return  information,  for the  period  ended  June 30,  1990 has been
audited by other  independent  accountants,  who have  expressed an  unqualified
opinion  thereon.  Arthur  Andersen  LLP's  report,  along  with  the  financial
statements  of the Fund,  are contained in the Fund's  Annual  Report,  which is
available by contacting the Fund at (800) 711-6141.

CLASS N SHARES*
FOR A SHARE OUTSTANDING THROUGHOUT THE PERIOD (I)

<TABLE>
<CAPTION>
                                         Six Months Ended                                                                Four Months
                                          April 30, 2000                                                                    Ended
                                            (unaudited)                           Year Ended October 31,                   Oct. 31,
- ------------------------------------------------------------------------------------------------------------------------------------
                                                              1999        1998         1997         1996         1995      1994(ii)
                                                           ----------  ----------    -------      -------       ------     ------
<S>                                                             <C>         <C>        <C>          <C>          <C>        <C>
Net asset value, beginning of period                            $6.65       $5.74      $4.54        $6.98        $6.27      $5.71
                                                           ----------  ----------    -------      -------       ------     ------
Net investment income (loss)                                    (0.07)      (0.02)     (0.06)(iii)  (0.08)(iii)  (0.17)     (0.04)

Net realized and unrealized gain
  (loss) on investments                                          4.22        0.98       1.26         0.41         2.41       0.60
                                                           ----------  ----------    -------      -------       ------     ------

Total from investment operations                                 4.15        0.96       1.20         0.33         2.24       0.56
Distributions from net realized gains                           (0.04)      (0.05)        --        (2.77)       (1.53)        --
                                                           ----------  ----------    -------      -------       ------     ------

Net asset value, end of period                                 $10.76       $6.65      $5.74        $4.54        $6.98      $6.27
                                                           ==========  ==========    =======      =======       ======     ======
Total return(iv)                                                62.66%      16.94%     26.45%       12.68%       57.72%      9.93%
                                                           ==========  ==========    =======      =======       ======     ======
Ratios and Supplemental Data:
  Net assets, end of period (000's omitted)                  $548,656    $193,039    $84,988      $11,485       $5,374     $4,832
                                                           ==========  ==========    =======      =======       ======     ======
  Ratio of expenses excluding interest to
    average net assets                                           1.83%       1.90%
                                                           ==========  ==========
  Ratio of expenses including interest to
    average net assets                                           1.85%       1.96%      2.12%        2.55%(v)     3.76%      2.75%
                                                           ==========  ==========    =======      =======       ======     ======
  Ratio of net investment income (loss) to
    average net assets                                          (1.52)%     (1.24)%    (1.06)%      (1.69)%      (3.05)%    (1.72)%
                                                           ==========  ==========    =======      =======       ======     ======
  Portfolio Turnover Rate                                      102.54%     190.74%    133.98%      197.04%      207.25%     56.24%
                                                           ==========  ==========    =======      =======       ======     ======
  Amount of debt outstanding at end
    of period                                                      --    $705,000
                                                           ==========  ==========
  Average amount of debt outstanding
    during the period                                        $986,981  $1,044,096
                                                           ==========  ==========
  Average daily number of shares
    outstanding during the period                          40,946,839  22,865,292
                                                           ==========  ==========
  Average amount of debt per share
    during the period                                           $0.02       $0.05
                                                           ==========  ==========
</TABLE>

*     During the periods shown, shares of the Fund now designated Class N shares
      were the only shares outstanding. Class A shares were not offered prior to
      the date of this prospectus.


(i)   Per share data has been  adjusted to reflect the effect of a 3 for 1 stock
      split which occurred April 23, 1999.

(ii)  Ratios have been annualized; total return has not been annualized.

(iii) Amount was computed based on average shares outstanding during the year.

(iv)  Distributions paid when the Fund operated as a closed-end fund (i.e. prior
      to February 12, 1996),  have been reflected as being  reinvested at market
      value.


(v)   Amount  has been  reduced  by 0.69%  due to  expense  reimbursements  made
      pursuant to applicable state expense limits.


(vi)  Unaudited.

8
<PAGE>


                               Year Ended June 30,
- --------------------------------------------------------------------------------

          1994           1993          1992           1991           1990
          ----           ----          ----           ----           ----
         $6.34          $5.98         $6.50          $6.24          $5.04
        ------         ------        ------         ------         ------
         (0.09)         (0.10)        (0.07)         (0.05)         (0.04)
          0.89           1.23          0.55           0.75           1.27
        ------         ------        ------         ------         ------
          0.80           1.13          0.48           0.70           1.23
         (1.43)         (0.77)        (1.00)         (0.44)         (0.03)
        ------         ------        ------         ------         ------
         $5.71          $6.34         $5.98          $6.50          $6.24
        ======         ======        ======         ======         ======
         17.53%         23.66%        11.65%         15.63%         24.76%(vi)
        ======         ======        ======         ======         ======

        $4,394         $4,884        $4,603         $5,006         $4,805
        ======         ======        ======         ======         ======





          2.59%          2.57%         2.14%          2.74%          3.01%
        ======         ======        ======         ======         ======

         (1.47)%        (1.55)%       (1.07)%        (0.85)%        (0.76)%
        ======         ======        ======         ======         ======
        116.61%        100.71%        63.54%         78.00%         81.70%
        ======         ======        ======         ======         ======


                                                                               9

<PAGE>

FOR FUND INFORMATION:

By telephone:     1-800-711-6141

By mail:     Spectra Fund
             One World Trade Center
             Suite 9333
             New York, NY 10048

By Internet: Text versions of Fund documents can be
             downloaded from the following sources:
             > The Fund: http://www.spectrafund.com
             > SEC (EDGAR database): http://www.sec.gov

STATEMENT OF ADDITIONAL INFORMATION

For more detailed information about the Fund and its policies,  investments, and
risks,   please  read  the  Statement  of  Additional   Information,   which  is
incorporated by reference into (is legally made a part of) this Prospectus.  You
can get a free copy of the  Statement of Additional  Information  by calling the
Fund's  toll-free  number or by writing to the address  above.  The Statement of
Additional Information is on file with the Securities and Exchange Commission.

ANNUAL AND SEMI-ANNUAL REPORTS

Additional  information about the Fund's  investments is available in the Fund's
annual and semi-annual reports to shareholders.  In the Fund's annual report you
will find a discussion of the market  conditions and investment  strategies that
significantly  affected the Fund's  performance during the period covered by the
report.  You can  receive  free  copies of these  reports by calling  the Fund's
toll-free number or by writing to the address above.

Another  way you can review and copy Fund  documents  is by  visiting  the SEC's
Public  Reference Room in Washington,  D.C.  Copies can also be obtained,  for a
duplicating  fee, by E-mail request to  [email protected]  or by writing to the
SEC's Public Reference Section,  Washington,  DC 20549-0102.  Information on the
operation of the Public Reference Room is available by calling 1-202-942-8090.

DISTRIBUTOR: FRED ALGER & COMPANY, INCORPORATED
Spectra Fund
SEC File #811-1743


SP20


      SPECTRA FUND

            CLASS A SHARES

       INVESTING IN COMPANIES OF ALL SIZES TO ACHIEVE
       CAPITAL APPRECIATION



                                                                      PROSPECTUS


                                                                   JULY   , 2000





      As with all mutual funds,  the Securities and Exchange  Commission has not
      determined if the  information in this Prospectus is accurate or complete,
      nor has it  approved or  disapproved  these  securities.  It is a criminal
      offense to represent otherwise.

      An investment in the Fund is not a deposit of a bank and is not insured or
      guaranteed  by the  Federal  Deposit  Insurance  Corporation  or any other
      government agency.
<PAGE>


SPECTRA FUND


 CLASS N SHARES



     PROSPECTUS
    July , 2000



TABLE OF CONTENTS
- --------------------------------------------------------------------------------


2 ..............  Risk/Return Summary: Investments, Risks & Performance

3 ..............  Fees & Expenses

4 ..............  Additional Information About
                  the Fund's Investments

4 ..............  Management & Organization

4 ..............  Shareholder Information

5 ..............  Purchasing and Redeeming
                  Fund Shares

6 ..............  Investment Instructions

7 ..............  Redemption Instructions

8 ..............  Financial Highlights

Back Cover .....  How to obtain more information

<PAGE>


[GRAPHIC OMITTED]

RISK/RETURN SUMMARY: INVESTMENTS,
RISKS & PERFORMANCE

INVESTMENT GOAL AND APPROACH

THE FUND SEEKS LONG-TERM CAPITAL APPRECIATION.

It invests primarily in equity  securities,  such as common or preferred stocks,
which are listed on U.S. exchanges or in the  over-the-counter  market. The Fund
invests primarily in "growth" stocks. The Fund's Manager, Fred Alger Management,
Inc., believes that these companies tend to fall into one of two categories:

o  High Unit Volume Growth

   Vital,  creative  companies  which  offer  goods  or  services  to a  rapidly
   expanding  marketplace.  They include both  established  and emerging  firms,
   offering new or improved  products,  or firms simply  fulfilling an increased
   demand for an existing line.

o  Positive Life Cycle Change

   Companies   experiencing   a  major  change  which  is  expected  to  produce
   advantageous  results.  These  changes  may be as varied  as new  management,
   products or  technologies;  restructuring  or  reorganization;  or merger and
   acquisition.

The Fund can leverage,  that is, borrow money, to buy additional  securities for
its portfolio.  By borrowing  money,  the Fund has the potential to increase its
returns if the  increase in the value of the  securities  purchased  exceeds the
cost of borrowing, including interest paid on the money borrowed.

PRINCIPAL RISKS

The main risks in investing in the Fund are:

o  fluctuation  in Fund price per share due to  changes in the market  prices of
   its investments

o  the tendency of stocks,  especially "growth" stocks, to be more volatile than
   some other investments you could make, such as bonds

o  the risk that the cost of borrowing money to leverage will exceed the returns
   for the securities purchased or that the securities purchased may actually go
   down in value;  thus,  the Fund's net asset value could decrease more quickly
   than if it had not borrowed

Prices  of growth  stocks  tend to be higher  in  relation  to their  companies'
earnings,  and  may  be  more  sensitive  to  market,   political  and  economic
developments than other stocks, making their prices more volatile.

The Fund's trading in some stocks may be relatively short-term, meaning that the
Fund may buy a  security  and sell it a short time  later to take  advantage  of
current  gains if it is  believed  that an  alternative  investment  may provide
greater future growth.  This activity may create higher transaction costs due to
commissions and other expenses.  In addition, a high level of short-term trading
may increase the Fund's realized gains, thereby increasing the amount of taxable
distributions to shareholders at the end of the year.

As with any equity fund, your  investment  will go up or down in value,  and the
loss of your investment is a risk of investing.  Based on the Fund's  investment
objective, an investment in the Fund may be better suited for investors who seek
long-term  capital growth and can tolerate  fluctuations  in their  investment's
value.

2
<PAGE>

PERFORMANCE


The following bar chart shows the changes in the performance of the Fund's Class
N  shares  from  year to year and  gives  you some  indication  of the  risks of
investing  in the Fund.  The table  beneath it compares the  performance  of the
Fund's  Class N shares  over  several  periods  with a broad  measure  of market
performance.   The  total  returns   reflect   reinvestment   of  dividends  and
distributions.*  Remember  that  the  Fund's  performance  in  the  past  is not
necessarily an indication of how it will perform in the future.


- ----------

* Dividends  and  distributions  paid prior to February 12, 1996,  when the Fund
converted from a closed-end fund, are reflected as reinvested at market value.

================================================================================

Annual Total Return as of December 31 each year (%)*


2.81      57.30    8.49   27.56    3.66   47.69   19.48   24.69   47.94   71.94
- --------------------------------------------------------------------------------
 90         91      92      93      94      95      96      97      98      99

Best Quarter:       Q4 1999        +44.34%
Worst Quarter:      Q3 1990       - 19.18%
================================================================================

* The Fund's total return for the period from January 1, 2000 through  March 31,
2000 was 11.61%.


The following table compares the Fund's  performance with that of the S&P(R) 500
Index.

================================================================================
Average Annual Total Return as of December 31, 1999


                   1 Year           5 Years         10 Years          20 Years
- --------------------------------------------------------------------------------
Class N            71.94%           41.12%           29.22%            23.73%
S&P 500 Index      21.04%           28.56%           18.21%            17.89%

================================================================================

The Fund also offers Class A shares. Class A and Class N shares differ only in
that Class A shares are subject to a sales charge, whereas Class N shares are
not. Because of the sales charge, returns will be lower for Class A shares.


                          ======================================================
                                         THE S&P 500 INDEX IS AN UNMANAGED INDEX
                                 COMPOSED OF 500 LARGE COMPANY STOCKS. INVESTORS
                                 CANNOT MAKE INVESTMENTS DIRECTLY INTO AN INDEX.
                          ======================================================


[GRAPHIC OMITTED]

FEES AND EXPENSES


Investors  incur certain fees and expenses in  connection  with an investment in
the Fund.  The table below shows the fees and expenses that you may incur if you
buy and hold Class N shares of the Fund.

================================================================================
Shareholder Fees
(fees paid directly from your investment)                                 None

Annual Fund Operating Expenses
(expenses that are deducted from Fund Assets)
     Management Fees                                                      1.50%
     Distribution Fees                                                    None
     Other Expenses                                                       0.35%
                                                                          ----
Total Annual Fund Operation Expenses                                      1.85%
                                                                          ====
================================================================================




EXAMPLE

The example  below is intended to help you compare the cost of  investing in the
Fund with the cost of investing in other mutual funds.


The example  assumes  that you invest  $10,000 in Class N shares of the Fund for
the time periods indicated.  The example also assumes that your investment has a
5% return each year and that the Fund's operating expenses remain the same as in
the table  above.  The  figures  shown  would be the same  whether you sold your
shares at the end of each period or kept them. Although your actual costs may be
higher or lower, based on these assumptions your costs would be:


================================================================================
  1 Year                3 Years                5 Years                10 Years
- --------------------------------------------------------------------------------
  $188                    $582                  $1,001                 $2,169
================================================================================

                                                                               3
<PAGE>


The Fund pays its Distributor, Fred Alger & Company, Incorporated, a shareholder
servicing  fee of .25% of the value of the Fund's  average  daily net assets for
service and maintenance of shareholder accounts. The Distributor may pay some of
this fee to other  organizations  that also provide  service and  maintenance of
shareholder accounts.

ADDITIONAL INFORMATION ABOUT THE FUND'S INVESTMENTS

The  Fund  may  invest  up to 100% of its  assets  in  cash,  commercial  paper,
high-grade  bonds, or cash  equivalents for temporary  defensive  reasons if the
Manager  believes that adverse market or other  conditions  warrant.  This is to
attempt to protect the Fund's assets from a temporary unacceptable risk of loss,
rather than directly to promote the Fund's investment objective.

Other securities the Fund may invest in are discussed in the Fund's Statement of
Additional Information (see back cover).


[GRAPHIC OMITTED]

MANAGEMENT AND ORGANIZATION

MANAGER
Fred Alger Management, Inc.
One World Trade Center
Suite 9333
New York, NY 10048


The Manager has been an investment  adviser since 1964, and manages  investments
totaling  (at  6/30/00)  $____  billion  in mutual  fund  assets as well as $___
billion in other assets. The Manager makes investment decisions for the Fund and
continuously  reviews  and  administers  the Fund's  investment  program.  These
management   responsibilities  are  subject  to  the  Fund's  Board  ofTrustees'
supervision.  The Fund has had the same Manager since 1974, and pays the Manager
a fee at an annual rate of 1.50% of its average daily net assets.


PORTFOLIO MANAGERS

David Alger and David Hyun are the  individuals  responsible  for the day-to-day
management of the Fund's  portfolio and have served in that capacity  since 1974
and 1998, respectively. Mr. Alger, has been employed by the Manager as Executive
Vice President and Director of Research since 1971, and as President since 1995.
Mr.  Hyun has been  employed  by the  Manager as an Analyst  since 1991 and as a
Senior Vice President and co-manager since 1998.

[GRAPHIC OMITTED]        SHAREHOLDER
                         INFORMATION

                         DISTRIBUTOR
                         Fred Alger & Company, Incorporated
                         30 Montgomery Street
                         Jersey City, New Jersey 07302

                         TRANSFER AGENT
                         Alger Shareholder Services, Inc.
                         30 Montgomery Street
                         Jersey City, New Jersey 07302


NET ASSET VALUE CLASS N


The  price of one Class N share is its "net  asset  value",  or NAV.  The NAV is
calculated as of the close of business  (normally 4:00 p.m.  Eastern time) every
day the New York Stock  Exchange is open.  Generally,  the Exchange is closed on
weekends and various national holidays.  It may close on other days from time to
time.

The Fund generally  values its assets on the basis of market  quotations.  Where
market  quotations  are not readily  available,  the Manager  makes a good faith
determination on the basis of fair value,  under procedures adopted by the Board
of Trustees.

DIVIDENDS AND DISTRIBUTIONS

Dividends  of the Fund's net  investment  income  and  distributions  of its net
realized  capital  gains are  declared and paid  annually by the Fund.  The Fund
expects that these annual  payments to  shareholders  will consist  primarily of
capital gains, which may be taxable to you at different rates depending upon how
long the Fund held the securities  that it sold to create the gains.  Unless you
choose to receive  cash  payments by checking  the  appropriate  box on your New
Account  Application,   any  dividends  and  distributions  will  be  reinvested
automatically

4
<PAGE>


at the NAV on their  payment  dates.  If you have  chosen  cash  payments  and a
payment is returned to the Fund as undeliverable, upon receipt that payment will
be  reinvested in Fund shares at the next NAV. All  subsequent  payments will be
reinvested  until you  reinstate  your cash election and provide a valid mailing
address.

Regardless of whether you choose to take  distributions in cash or reinvest them
in the Fund, they may be subject to federal and state taxes.  Because everyone's
tax situation is unique,  see a tax advisor about  federal,  state and local tax
consequences of investing in the Fund.

                         =======================================================
                                     NAV (NET ASSET VALUE) IS COMPUTED BY ADDING
                               TOGETHER THE VALUE OF THE PORTFOLIO'S INVESTMENTS
                         PLUS CASH AND OTHER ASSETS, SUBTRACTING ITS LIABILITIES
                                   AND THEN DIVIDING THE RESULT BY THE NUMBER OF
                                                         ITS OUTSTANDING SHARES.
                         =======================================================


CLASSES OF FUND SHARES


The Fund offers two classes of shares. Class N shares are not subject to a sales
charge and can be purchased (i) directly from the Fund, (ii) through  investment
advisers and other  professionals  who offer "wrap  programs"--I.E.,  investment
portfolio  services  for a fee,  and (iii)  through  discount  brokers and other
financial   intermediaries   that  offer  transaction   processing  and  account
maintenance  facilities  relating  to  varied  menus of  mutual  funds  and fund
families.  Class A shares  are  subject  to a  front-end  sales  charge  and are
available  only  through  authorized  broker  dealers.  Only  Class N shares are
offered in this prospectus.

PURCHASING AND REDEEMING CLASS N SHARES

No sales charge is imposed on Class N shares. You can purchase or redeem some or
all of your shares on any day the New York Stock Exchange is open.  They will be
processed at the NAV next calculated  after your purchase or redemption  request
is received in good order by the Transfer  Agent.  Ordinarily,  your  redemption
check will be issued within 7 days after your redemption  request is accepted by
the  Transfer  Agent.  However,  when you  purchase  shares  with a check or via
TelePurchase or Automatic Investment Plan, no check will be issued against those
funds for 15 days. The Transfer Agent or Fund may reject any purchase order. The
Fund does not impose a sales charge for redemptions.

Different  ways to purchase and redeem are listed on the  following  pages.  For
telephone redemptions, the Fund and Transfer Agent have reasonable procedures in
place to determine that the  instructions are genuine.  They include  requesting
personal  identification  and recording  calls.  If the Fund and Transfer  Agent
follow  these  procedures,  they are not  liable  for  acting  in good  faith on
telephone instructions.


================================================================================
MINIMUM INVESTMENTS
                                         Initial                     Subsequent

                                        Investment                   Investment

- --------------------------------------------------------------------------------
Regular account                           $1,000                        $100
Traditional IRA                             $250                        $100
Roth IRA                                    $250                        $100
Education IRA                               $100                        $100
SIMPLE IRA                                  $250                        $100
Keogh                                       $250                        $100
401(k)                                      $250                        $100
403(b)                                      $250                        $100
Automatic Investment                         $25                         $25
================================================================================


                                                                               5
<PAGE>



================================================================================
INVESTMENT INSTRUCTIONS - Class N Shares


TO OPEN AN ACCOUNT:

BY MAIL:
- --------------------------------------------------------------------------------
(make checks payable to Spectra Fund)
Mail your completed  application and check to:

      Alger Shareholder Services, Inc.
      30 Montgomery Street
      Jersey City, NJ 07302


BY FED WIRE:
- --------------------------------------------------------------------------------
Have your bank wire funds to:

INSTRUCTIONS                                 EXAMPLE

State Street Bank &                          State Street Bank &
  Trust Company                                Trust Company
Boston, MA 02101                             Boston, MA 02101
ABA # 011000028                              ABA #011000028
BNF: Spectra Fund                            BNF=Spectra Fund
AC-00797548                                  AC-00797548
Originator To
  Beneficiary Information=                   OBI=Spectra Fund
New Account                                  New Account*
Shareholder Name(s)                          John & Jane Doe
Tax ID Number                                123-45-6789

Forward the  completed New Account  Application  to Alger  Shareholder  Services
stating  that the  account was  established  by wire  transfer  and the date and
amount of the transfer.

*If you already have an account number assigned to you, insert it here.

CONTACT:
- --------------------------------------------------------------------------------
CALL OR  VISIT  your  discount  broker,  investment  adviser,  or bank or  other
financial institution.

AUTOMATICALLY:
- --------------------------------------------------------------------------------
Complete  the  AUTOMATIC  INVESTMENT  PLAN option on your  account  application.
Minimum automatic investment is $25.

VIA OUR WEBSITE:
- --------------------------------------------------------------------------------
Visit  the  Spectra  Fund  website  to  download  a new  account  application  -
www.spectrafund.com

Mail completed  application with your investment to Alger Shareholder  Services,
Inc.
================================================================================



================================================================================
TO MAKE ADDITIONAL INVESTMENTS IN AN EXISTING ACCOUNT - Class N Shares


BY MAIL:
- --------------------------------------------------------------------------------
Complete and return the Invest by Mail slip  attached to your Spectra  Statement
and return the slip with your investment to:

      Alger Shareholder Services, Inc.
      30 Montgomery Street
      Jersey City, NJ 07302

BY TELEPHONE OR FED WIRE:
- --------------------------------------------------------------------------------
TELEPURCHASE*  allows you to purchase shares by telephone (minimum $500, maximum
$50,000) by filling out the appropriate  section of the New Account  Application
or returning the Telephone  Services Form.  The funds will be  transferred  from
your designated bank account to your Fund account,  normally within one business
day.

WIRE - Have your bank wire funds to:

State Street Bank & Trust Company. (See wire instructions at left.)

                                             *NOT AVAILABLE FOR RETIREMENT PLANS

CONTACT:
- --------------------------------------------------------------------------------
CALL OR  VISIT  your  discount  broker,  investment  adviser,  or bank or  other
financial institution.

AUTOMATICALLY:
- --------------------------------------------------------------------------------
SPECTRA FUND AUTOMATIC INVESTMENT PLAN allows you to make automatic purchases on
the 15th and/or the last  business day of each month.  Fill out the  appropriate
information on the New Account Application or contact Spectra Fund to receive an
Additional Services Form. Minimum automatic investment is $25.

GOVERNMENT  DIRECT DEPOSIT* allows you to arrange direct deposit of U.S. federal
government  payments  into your Spectra Fund account and PAYROLL  SAVINGS  PLAN*
allows you to arrange  direct  deposit of a portion of your payroll  directly to
your Spectra Fund Account. Call for a Payroll Savings Plan Form.

                                             *NOT AVAILABLE FOR RETIREMENT PLANS

VIA OUR WEBSITE:
- --------------------------------------------------------------------------------
Visit the Spectra  Fund  website to download  all forms to add  services to your
account - www.spectrafund.com

Mail your completed forms to Alger Shareholder Services,  Inc. In addition,  you
can perform certain transactions electronically via our website.
================================================================================

6
<PAGE>



================================================================================
REDEMPTION INSTRUCTIONS - Class N Shares


BY MAIL:
- --------------------------------------------------------------------------------

SEND a letter of instruction to Alger Shareholder Services, Inc. which includes

    - account  number
    - number of shares or dollar  amount of redemption
    - where to send the proceeds
    - signature(s) of registered owner(s)
    - a signature guarantee is required if
         - your redemption is for more than $25,000; or
         - you want the check sent to a different  address than  the one we have
           on file; or
         - you want the  check to be made  payable  to  someone  other  than the
           registered owner(s) we have on file; or
         - you have changed your address on file within the past 60 days.

BY TELEPHONE:*
- --------------------------------------------------------------------------------
CALL  800-711-6141  to sell shares  (unless you refuse this  service on your New
Account  Application).  The Fund will send you a check for amounts up to $5,000.
You can choose to receive a check or a wire** for amounts over $5,000. Note: you
cannot  request a check if you have changed your address on file within the past
60 days.

TELEREDEMPTION  allows you to redeem  shares by  telephone  by  filling  out the
appropriate  section of the New Account  Application  or returning the Telephone
Services  Form.  The funds will be transferred to your bank account in an amount
between $500 and $50,000,  normally  within 2 business  days.  Shares  issued in
certificate form are not eligible for this service.

                                             *NOT AVAILABLE FOR RETIREMENT PLANS
               **ONLY IF THE APPROPRIATE SECTION OF THE APPLICATION IS COMPLETED

CONTACT:
- --------------------------------------------------------------------------------
CALL OR VISIT your broker dealer, investment adviser, or bank or other financial
institution.

AUTOMATICALLY:
- --------------------------------------------------------------------------------
SYSTEMATIC  WITHDRAWAL PLAN allows you to receive regular monthly,  quarterly or
annual payments.  Your account value must be at least $10,000,  and the payments
must be for $50 or more.  The maximum  monthly  withdrawal  is 1% of the current
account value in the Fund at the time you begin participation in the Plan.

VIA OUR WEBSITE:
- --------------------------------------------------------------------------------
Visit  the  Spectra  Fund  website  to  download  all  forms  to add  redemption
privileges to your existing account - www.spectrafund.com.  In addition, you can
now perform certain transactions electronically via our website.

Mail your completed forms to Alger Shareholder Services, Inc.
================================================================================


TO SPEAK WITH A SPECTRA FUND REPRESENTATIVE CALL 1-800-711-6141

e-mail: [email protected]

web address: www.spectrafund.com

Representatives are available to assist you with any questions you have.

                              ==================================================
                                         SIGNATURE GUARANTEE IS A GUARANTEE BY A
                                       FINANCIAL INSTITUTION THAT YOUR SIGNATURE
                                         IS AUTHENTIC. THE FINANCIAL INSTITUTION
                                      ACCEPTS LIABILITY FOR ANY FORGERY OR FRAUD
                                     IF THE SIGNATURE IT GUARANTEES PROVES TO BE
                                    COUNTERFEIT. IT IS AN IDEAL MEANS TO PROTECT
                                 INVESTORS AND THEIR ASSETS. A NOTARIZATION BY A
                                  NOTARY PUBLIC IS NOT AN ACCEPTABLE SUBSTITUTE.
                              ==================================================


Unless your account is a Spectra-sponsored  tax-deferred  retirement plan, if it
falls below $500 because of  redemptions,  the Fund may send you written  notice
providing 60 days to restore it to the minimum balance.  After 60 days, the Fund
may close your account and redeem all of your shares.

To purchase Class A shares, contact your broker dealer.

Under unusual circumstances,  the Fund may redeem some of your shares "in kind",
which means that some of the proceeds will be paid with securities the Fund owns
instead of cash.

Shares may be worth more or less when you redeem  them than they are at the time
you buy them.  This means that you may  realize a taxable  gain or loss when you
redeem shares.

EXCHANGES

You can exchange  shares of the Fund for shares of Alger Money Market  Portfolio
of The Alger Fund, another portfolio advised by the Manager. If you would like a
prospectus describing the Money Market Portfolio,  please call the Fund at (800)
711-6141. Remember that for tax purposes, an exchange is considered a sale and a
purchase. Thus, you may realize a taxable gain or loss when you exchange shares.

Certain exchange transactions can be performed on our website.  Contact the Fund
for details.

                                                                               7
<PAGE>


[GRAPHIC OMITTED]

FINANCIAL HIGHLIGHTS


The Financial  Highlights table is intended to help you understand the financial
performance of the Fund's Class N shares for the indicated periods. The Fund was
a closed-end fund until February 12, 1996, when it became an open-end investment
company. Certain information reflects financial results for a single Fund share.
The total returns in the table  represent  the rate that an investor  would have
earned  or lost on an  investment  in the  Fund  (assuming  reinvestment  of all
dividends and distributions).

The  Financial  Highlights  for the fiscal  periods  ended June 30, 1991 through
October  31,  1999  have  been  audited  by  Arthur  Andersen  LLP,  the  Fund's
independent public accountants.  The Financial Highlights, with the exception of
the total  return  information,  for the  period  ended  June 30,  1990 has been
audited by other  independent  accountants,  who have  expressed an  unqualified
opinion  thereon.  Arthur  Andersen  LLP's  report,  along  with  the  financial
statements  of the Fund,  are contained in the Fund's  Annual  Report,  which is
available by contacting the Fund at (800) 711-6141.


CLASS N SHARES
FOR A SHARE OUTSTANDING THROUGHOUT THE PERIOD (I)

<TABLE>
<CAPTION>
                                       Six Months
                                          Ended
                                     April 30, 2000
                                       (unaudited)                            Year Ended October 31,
- ---------------------------------------------------------------------------------------------------------------------------------
                                                         1999           1998           1997               1996               1995
                                                  -----------    -----------    -----------        -----------        -----------
<S>                                               <C>            <C>            <C>                <C>                <C>
Net asset value, beginning of period              $      6.65    $      5.74    $      4.54        $      6.98        $      6.27
                                                  -----------    -----------    -----------        -----------        -----------
Net investment income (loss)                            (0.07)         (0.02)         (0.06)(iii)        (0.08)(iii)        (0.17)
Net realized and unrealized gain
  (loss) on investments                                  4.22           0.98           1.26               0.41               2.41
                                                  -----------    -----------    -----------        -----------        -----------
Total from investment operations                         4.15           0.96           1.20               0.33               2.24
Distributions from net realized gains                   (0.04)         (0.05)            --              (2.77)             (1.53)
                                                  -----------    -----------    -----------        -----------        -----------
Net asset value, end of period                    $     10.76    $      6.65    $      5.74        $      4.54        $      6.98
                                                  ===========    ===========    ===========        ===========        ===========
Total return(iv)                                        62.66%         16.94%         26.45%             12.68%             57.72%
                                                  ===========    ===========    ===========        ===========        ===========
Ratios and Supplemental Data:
  Net assets, end of period
    (000's omitted)                               $   548,656    $   193,039    $    84,988        $    11,485        $     5,374
                                                  ===========    ===========    ===========        ===========        ===========
  Ratio of expenses excluding
    interest to average net assets                       1.83%          1.90%
                                                  ===========
  Ratio of expenses including
    interest to average net assets                       1.85%          1.96%          2.12%              2.55%(v)           3.76%
                                                  ===========    ===========    ===========        ===========        ===========
  Ratio of net investment income
    (loss) to average net assets                        (1.52)%        (1.24)%        (1.06)%            (1.69)%            (3.05)%
                                                  ===========    ===========    ===========        ===========        ===========
  Portfolio Turnover Rate                              102.54%        190.74%        133.98%            197.04%            207.25%
                                                  ===========    ===========    ===========        ===========        ===========
  Amount of debt outstanding at
    end of period                                          --    $   705,000
                                                  ===========
  Average amount of debt
     outstanding during the period                $   986,981    $ 1,044,096
                                                  ===========
  Average daily number of shares
    outstanding during the period                  40,946,839     22,865,292
                                                  ===========    ===========
  Average amount of debt per share
    during the period                             $      0.02    $      0.05
                                                  ===========    ===========
</TABLE>

(i)   Per share data has been  adjusted to reflect the effect of a 3 for 1 stock
      split which occurred April 23, 1999.

(ii)  Ratios have been annualized; total return has not been annualized.

(iii) Amount was computed based on average shares outstanding during the year.

(iv)  Distributions paid when the Fund operated as a closed-end fund (i.e. prior
      to February 12, 1996),  have been reflected as being  reinvested at market
      value.

(v)   Amount  has been  reduced  by 0.69%  due to  expense  reimbursements  made
      pursuant to applicable state expense limits.

(vi)  Unaudited.

8
<PAGE>


  Four
 Months
  Ended
Oct. 31,                             Year Ended June 30,
- ------------------------------------------------------------------------------
 1994(ii)        1994         1993          1992          1991        1990
 ------        ------       ------        ------         ------     ------
  $5.71         $6.34        $5.98         $6.50         $6.24       $5.04
 ------        ------       ------        ------        ------      ------
  (0.04)        (0.09)       (0.10)        (0.07)        (0.05)      (0.04)

   0.60          0.89         1.23          0.55          0.75        1.27
 ------        ------       ------        ------        ------      ------
   0.56          0.80         1.13          0.48          0.70        1.23
     --         (1.43)       (0.77)        (1.00)        (0.44)      (0.03)
 ------        ------       ------        ------        ------      ------
  $6.27         $5.71        $6.34         $5.98         $6.50       $6.24
 ======        ======       ======        ======        ======      ======
   9.93%        17.53%       23.66%        11.65%        15.63%      24.76%(vi)
 ======        ======       ======        ======        ======      ======


 $4,832        $4,394       $4,884        $4,603        $5,006      $4,805
 ======        ======       ======        ======        ======      ======







   2.75%         2.59%        2.57%         2.14%         2.74%       3.01%
 ======        ======       ======        ======        ======      ======
  (1.72)%       (1.47)%      (1.55)%       (1.07)%       (0.85)%     (0.76)%
 ======        ======       ======        ======        ======      ======
  56.24        116.61%      100.71%        63.54%        78.00%      81.70%
 ======        ======       ======        ======        ======      ======









                                                                               9
<PAGE>


FOR FUND INFORMATION:

By telephone:     1-800-711-6141


By mail:     Spectra Fund
             One World Trade Center
             Suite 9333
             New York, NY 10048

By Internet: Text versions of Fund documents can be
             downloaded from the following sources:
             > The Fund: http://www.spectrafund.com
             > SEC (EDGAR database): http://www.sec.gov

STATEMENT OF ADDITIONAL INFORMATION

For more detailed information about the Fund and its policies,  investments, and
risks,   please  read  the  Statement  of  Additional   Information,   which  is
incorporated by reference into (is legally made a part of) this Prospectus.  You
can get a free copy of the  Statement of Additional  Information  by calling the
Fund's  toll-free  number or by writing to the address  above.  The Statement of
Additional  Information is on file with the Securities and Exchange  Commission.

ANNUAL AND SEMI-ANNUAL REPORTS

Additional  information about the Fund's  investments is available in the Fund's
annual and semi-annual reports to shareholders.  In the Fund's annual report you
will find a discussion of the market  conditions and investment  strategies that
significantly  affected the Fund's  performance during the period covered by the
report.  You can  receive  free  copies of these  reports by calling  the Fund's
toll-free number or by writing to the address above.

Another  way you can review and copy Fund  documents  is by  visiting  the SEC's
Public  Reference Room in Washington,  D.C.  Copies can also be obtained,  for a
duplicating  fee, by E-mail request to  [email protected]  or by writing to the
SEC's Public Reference Section,  Washington,  DC 20549-0102.  Information on the
operation of the Public Reference Room is available by calling 1-202-942-8090.

DISTRIBUTOR: FRED ALGER & COMPANY, INCORPORATED
Spectra Fund
SEC File #811-1743

SP20



      SPECTRA FUND

        CLASS N SHARES





      INVESTING IN COMPANIES OF ALL SIZES TO ACHIEVE CAPITAL APPRECIATION






                                                                      PROSPECTUS
                                                                  July    , 2000



      As with all mutual funds,  the Securities and Exchange  Commission has not
      determined if the  information in this Prospectus is accurate or complete,
      nor has it  approved or  disapproved  these  securities.  It is a criminal
      offense to represent otherwise.

      An investment in the Fund is not a deposit of a bank and is not insured or
      guaranteed  by the  Federal  Deposit  Insurance  Corporation  or any other
      government agency.
<PAGE>


      Spectra Fund

            Class A Shares
            Class N Shares




TABLE OF CONTENTS


                                                                      PROSPECTUS
                                                                     July , 2000


2 ..............  Risk/Return Summary: Investments,
                  Risks & Performance

3 ..............  Fees & Expenses

4 ..............  Additional Information About
                  the Fund's Investments

4 ..............  Management & Organization

4 ..............  Shareholder Information

5 ..............  Purchasing and Redeeming
                  Fund Shares

6 ..............  Investment Instructions

7 ..............  Redemption Instructions

8 ..............  Financial Highlights

Back Cover .....  How to obtain more information
<PAGE>


[GRAPHIC OMITTED]

Risk/Return Summary: Investments,
Risks & Performance


Investment Goal and Approach

The Fund seeks long-term capital appreciation.

It invests primarily in equity  securities,  such as common or preferred stocks,
which are listed on U.S. exchanges or in the  over-the-counter  market. The Fund
invests primarily in "growth" stocks. The Fund's Manager, Fred Alger Management,
Inc., believes that these companies tend to fall into one of two categories:

o  High Unit Volume Growth

   Vital,  creative  companies  which  offer  goods  or  services  to a  rapidly
   expanding  marketplace.  They include both  established  and emerging  firms,
   offering new or improved  products,  or firms simply  fulfilling an increased
   demand for an existing line.

o  Positive Life Cycle Change

   Companies   experiencing   a  major  change  which  is  expected  to  produce
   advantageous  results.  These  changes  may be as varied  as new  management,
   products or  technologies;  restructuring  or  reorganization;  or merger and
   acquisition.

The Fund can leverage,  that is, borrow money, to buy additional  securities for
its portfolio.  By borrowing  money,  the Fund has the potential to increase its
returns if the  increase in the value of the  securities  purchased  exceeds the
cost of borrowing, including interest paid on the money borrowed.

PRINCIPAL RISKS

The main risks in investing in the Fund are:

o  fluctuation  in Fund price per share due to  changes in the market  prices of
   its investments

o  the tendency of stocks,  especially "growth" stocks, to be more volatile than
   some other investments you could make, such as bonds

o  the risk that the cost of borrowing money to leverage will exceed the returns
   for the securities purchased or that the securities purchased may actually go
   down in value;  thus,  the Fund's net asset value could decrease more quickly
   than if it had not borrowed

Prices  of growth  stocks  tend to be higher  in  relation  to their  companies'
earnings,  and  may  be  more  sensitive  to  market,   political  and  economic
developments than other stocks, making their prices more volatile.

The Fund's trading in some stocks may be relatively short-term, meaning that the
Fund may buy a  security  and sell it a short time  later to take  advantage  of
current  gains if it is  believed  that an  alternative  investment  may provide
greater future growth.  This activity may create higher transaction costs due to
commissions and other expenses.  In addition, a high level of short-term trading
may increase the Fund's realized gains, thereby increasing the amount of taxable
distributions to shareholders at the end of the year.

As with any equity fund, your  investment  will go up or down in value,  and the
loss of your investment is a risk of investing.  Based on the Fund's  investment
objective, an investment in the Fund may be better suited for investors who seek
long-term  capital growth and can tolerate  fluctuations  in their  investment's
value.

PERFORMANCE


The following bar chart shows the changes in the Fund's performance from year to
year and gives you some  indication  of the risks of investing in the Fund.  The
table  beneath it compares the Fund's  performance  over several  periods with a
broad measure of market performance.  The total returns reflect  reinvestment of
dividends and  distributions.*  Remember that the Fund's performance in the past
is not necessarily an indication of how it will perform in the future.

Information  in the chart and the table is for the Fund's Class N shares,  which
were the only shares  outstanding  during the periods shown. Class A and Class N
shares differ only in that Class A shares are subject to a sales charge, whereas
Class N shares are not.  Because of the sales charge,  returns will be lower for
Class A shares.


- ----------
* Dividends  and  distributions  paid prior to February 12, 1996,  when the Fund
converted from a closed-end fund, are reflected as reinvested at market value.

2
<PAGE>



================================================================================
Annual Total Return as of December 31 each year (%)*


  2.81   57.30    8.49   27.56    3.66   47.69   19.48   24.69   47.94   71.94
- --------------------------------------------------------------------------------
    90      91      92      93      94      95      96      97      98      99

Best Quarter:       Q4 1999        +44.34%
Worst Quarter:      Q3 1990       - 19.18%
================================================================================


* The Fund's  total  return for the period from January 1, 2000 through June 30,
2000 was   %.


The following table compares the Fund's  performance with that of the S&P(R) 500
Index.


================================================================================
Average Annual Total Return as of December 31, 1999



                        1 Year          5 Years        10 Years        20 Years
- -------------------------------------------------------------------------------
Class N                 71.94%          41.12%          29.22%          23.73%
Class A                   --              --              --              --
(Inception 7/_/00)
S&P 500 Index           21.04%          28.56%          18.21%          17.89%
================================================================================

                          ======================================================
                                         THE S&P 500 INDEX IS AN UNMANAGED INDEX
                                 COMPOSED OF 500 LARGE COMPANY STOCKS. INVESTORS
                                 CANNOT MAKE INVESTMENTS DIRECTLY INTO AN INDEX.
                          ======================================================


[GRAPHIC OMITTED]


FEES AND EXPENSES


Investors  incur certain fees and expenses in  connection  with an investment in
the Fund.  The table below shows the fees and expenses that you may incur if you
buy and hold shares of the Fund.


================================================================================
                                    ANNUAL FUND OPERATING
                                    EXPENSES
                                    (expenses that are deducted
                                    from Fund assets)
                                 ----------------------------------------------
                    SHAREHOLDER
                        FEES
                     (fees paid                                         TOTAL
                   directly from                                     ANNUAL FUND
                        your      Management  Distribution   Other    OPERATING
CLASS               investment)      Fees         Fees      Expenses   EXPENSES
- --------------------------------------------------------------------------------
N SHARES              None          1.50%         None       0.35%      1.85%

A SHARES              4.75%*        1.50%         None       0.35%      1.85%
================================================================================

* Maximum sales charge imposed on purchases (as a percentage of offering price)



EXAMPLE

The example  below is intended to help you compare the cost of  investing in the
Fund with the cost of investing in other mutual funds.

The example  assumes  that you invest  $10,000 in the Fund for the time  periods
indicated.  The example also assumes that your  investment  has a 5% return each
year and that the  Fund's  operating  expenses  remain  the same as in the table
above.  The figures  shown would be the same whether you sold your shares at the
end of each period or kept them.  Although  your  actual  costs may be higher or
lower, based on these assumptions your costs would be:



================================================================================
                    1 Year         3 Years         5 Years          10 Years
- --------------------------------------------------------------------------------
Class N              $188            $582           $1,001          $2,169
Class A              $654          $1,029           $1,428          $2,541
================================================================================


The Fund pays its Distributor, Fred Alger & Company, Incorporated, a shareholder
servicing  fee of .25% of the value of the Fund's  average  daily net assets for
service and maintenance of shareholder accounts. The Distributor may pay some of
this fee to other  organizations  that also provide  service and  maintenance of
shareholder accounts.

                                                                               3
<PAGE>


ADDITIONAL INFORMATION ABOUT THE FUND'S INVESTMENTS

The  Fund  may  invest  up to 100% of its  assets  in  cash,  commercial  paper,
high-grade  bonds, or cash  equivalents for temporary  defensive  reasons if the
Manager  believes that adverse market or other  conditions  warrant.  This is to
attempt to protect the Fund's assets from a temporary unacceptable risk of loss,
rather  than  directly  to  promote  the  Fund's  investment  objective.

Other securities the Fund may invest in are discussed in the Fund's Statement of
Additional Information (see back cover).


[GRAPHIC OMITTED]

MANAGEMENT AND ORGANIZATION

MANAGER
Fred Alger Management, Inc.
One World Trade Center
Suite 9333
New York, NY 10048


The Manager has been an investment  adviser since 1964, and manages  investments
totaling  (at  6/30/00) $ billion in mutual  fund assets as well as $ billion in
other  assets.  The  Manager  makes  investment   decisions  for  the  Fund  and
continuously  reviews  and  administers  the Fund's  investment  program.  These
management   responsibilities  are  subject  to  the  Fund's  Board  ofTrustees'
supervision.  The Fund has had the same Manager since 1974, and pays the Manager
a fee at an annual rate of 1.50% of its average daily net assets.


PORTFOLIO MANAGERS

David Alger and David Hyun are the  individuals  responsible  for the day-to-day
management of the Fund's  portfolio and have served in that capacity  since 1974
and 1998, respectively. Mr. Alger, has been employed by the Manager as Executive
Vice President and Director of Research since 1971, and as President since 1995.
Mr.  Hyun has been  employed  by the  Manager as an Analyst  since 1991 and as a
Senior Vice President and co-manager since 1998.

[GRAPHIC OMITTED]        SHAREHOLDER
                         INFORMATION

                         DISTRIBUTOR
                         Fred Alger & Company, Incorporated
                         30 Montgomery Street
                         Jersey City, New Jersey 07302

                         TRANSFER AGENT
                         Alger Shareholder Services, Inc.
                         30 Montgomery Street
                         Jersey City, New Jersey 07302
NET ASSET VALUE


The price of one share is its "net asset  value",  or NAV,  plus any  applicable
sales charge.  The NAV is calculated as of the close of business  (normally 4:00
p.m. Eastern time) every day the New York Stock Exchange is open. Generally, the
Exchange is closed on weekends and various  national  holidays.  It may close on
other days from time to time.


The Fund generally  values its assets on the basis of market  quotations.  Where
market  quotations  are not readily  available,  the Manager  makes a good faith
determination on the basis of fair value,  under procedures adopted by the Board
of Trustees.

DIVIDENDS  AND  DISTRIBUTIONS

Dividends  of the Fund's net  investment  income  and  distributions  of its net
realized  capital  gains are  declared and paid  annually by the Fund.  The Fund
expects that these annual  payments to  shareholders  will consist  primarily of
capital gains, which may be taxable to you at different rates depending upon how
long the Fund held the securities  that it sold to create the gains.  Unless you
choose to receive  cash  payments by checking  the  appropriate  box on your New
Account  Application,   any  dividends  and  distributions  will  be  reinvested
automatically  at the NAV on  their  payment  dates.  If you  have  chosen  cash
payments  and a payment is returned to the Fund as  undeliverable,  upon receipt
that payment will be reinvested  in Fund shares at the next NAV. All  subsequent
payments will be reinvested until you reinstate your cash election and provide a
valid mailing address.

Regardless of whether you choose to take  distributions in cash or reinvest them
in the Fund, they may be sub-

4
<PAGE>


ject to federal and state taxes. Because everyone's tax situation is unique, see
a tax advisor about federal,  state and local tax  consequences  of investing in
the Fund.

=======================================================
            NAV (NET ASSET VALUE) IS COMPUTED BY ADDING
      TOGETHER THE VALUE OF THE PORTFOLIO'S INVESTMENTS
PLUS CASH AND OTHER ASSETS, SUBTRACTING ITS LIABILITIES
          AND THEN DIVIDING THE RESULT BY THE NUMBER OF
                                ITS OUTSTANDING SHARES.
=======================================================


CLASSES OF FUND SHARES

The Fund offers two classes of shares. Class N shares are not subject to a sales
charge and can be purchased (i) directly from the Fund, (ii) through  investment
advisers and other  professionals  who offer "wrap  programs"--i.e.,  investment
portfolio  services  for a fee,  and (iii)  through  discount  brokers and other
financial   intermediaries   that  offer  transaction   processing  and  account
maintenance  facilities  relating  to  varied  menus of  mutual  funds  and fund
families.  Class A shares  are  subject  to a  front-end  sales  charge  and are
available only through authorized broker dealers.  The following chart indicates
the sales charge you may pay when purchasing Class A shares:

================================================================================
                      Sales Charge          Sales Charge        Dealer Allowance
Purchase              as a % of             as a % of           as a % of
Amount                Offering Price        Net Asset Value     Offering Price
- --------------------------------------------------------------------------------
Less than $100,000       $4.75%                 4.99%                 4.00%
$100,000-$249,999        $4.00%                 4.17%                 3.25%
$250,000-$499,999        $3.00%                 3.09%                 2.50%
$500,000-$999,999        $2.25%                 2.30%                 1.75%
$1,000,000 and over         *                     *                   1.00%
================================================================================

* These  purchases  may be made at net asset value  without  any  initial  sales
charge,  but will be subject to a CDSC of 1.00% on  redemptions  made  within 12
months of purchase.

Purchases of Class A shares which,  when combined with current holdings of Class
A  shares  offered  with a sales  charge,  equal  or  exceed  $1,000,000  in the
aggregate,  may be made at net asset value without any  front-end  sales charge.
However,  these  shares will be subject to a  contingent  deferred  sales charge
(CDSC) if redeemed  within 12 months of purchase.  In calculating  the CDSC, the
Fund assumes that any shares not subject to a CDSC are redeemed first.

Class A share  front-end and contingent  deferred sales charges may be waived in
certain  circumstances,  which are  discussed  in the  Statement  of  Additional
Information.


PURCHASING AND REDEEMING FUND SHARES


You can  purchase  or redeem  some or all of your shares on any day the New York
Stock  Exchange is open.  They will be processed at the NAV (plus any applicable
sales  charge) next  calculated  after your  purchase or  redemption  request is
received in good order by the Transfer Agent. Ordinarily,  your redemption check
will be issued  within 7 days after your  redemption  request is accepted by the
Transfer  Agent.  However,  when  you  purchase  shares  with  a  check  or  via
TelePurchase or Automatic Investment Plan, no check will be issued against those
funds for 15 days. The Transfer Agent or Fund may reject any purchase order. The
Fund does not impose a sales charge for  redemptions  other than  redemptions of
Class A shares held for less than 12 months.

You may  aggregate  all the Class A shares you  purchase in the Fund in order to
obtain a reduced  sales charge (as  indicated  above) if you provide  sufficient
information at the time of purchase for verification of your eligibility for the
lower charge.

If you intend to make an  aggregate  purchase  of Class A shares of  $100,000 or
more over a period of 13 months or less, you can complete a letter of intent and
return it to the Fund. Please contact the Fund or consult your broker dealer for
details before you buy the shares.


================================================================================
MINIMUM INVESTMENTS

                                         Initial                   Subsequent
                                        Investment                 Investment
- --------------------------------------------------------------------------------
Regular account                           $1,000                      $100
Traditional IRA                             $250                      $100
Roth IRA                                    $250                      $100
Education IRA                               $100                      $100
SIMPLE IRA                                  $250                      $100
Keogh                                       $250                      $100
401(k)                                      $250                      $100
403(b)                                      $250                      $100
Automatic Investment                         $25                       $25
================================================================================


Class A shares are available only through authorized broker dealers. To purchase
or redeem Class A shares,  simply call your broker dealer. Class N shares may be
purchased in a variety of ways. For telephone redemptions, the Fund and Transfer
Agent have reasonable procedures in place to determine that the instructions are
genuine. They include requesting personal identification and recording calls. If
the Fund and Transfer  Agent follow  these  procedures,  they are not liable for
acting in good faith on telephone instructions.


                                                                               5
<PAGE>


================================================================================

INVESTMENT INSTRUCTIONS:
- --------------------------------------------------------------------------------
To open a Class A Share account: contact your broker-dealer
- --------------------------------------------------------------------------------
To open a Class N Share account:


BY MAIL:
- --------------------------------------------------------------------------------
(make checks payable to Spectra Fund)

Mail your completed application and check to:

      Alger Shareholder Services, Inc.
      30 Montgomery Street
      Jersey City, NJ 07302

BY FED WIRE:
- --------------------------------------------------------------------------------
Have your bank wire funds to:

INSTRUCTIONS                         EXAMPLE

State Street Bank &                  State Street Bank &
  Trust Company                        Trust Company
Boston, MA 02101                     Boston, MA 02101
ABA # 011000028                      ABA #011000028
BNF: Spectra Fund                    BNF=Spectra Fund
AC-00797548                          AC-00797548
Originator To
  Beneficiary Information=           OBI=Spectra Fund
New Account                          New Account*
Shareholder Name(s)                  John & Jane Doe
Tax ID Number                        123-45-6789

Forward the  completed New Account  Application  to Alger  Shareholder  Services
stating  that the  account was  established  by wire  transfer  and the date and
amount of the transfer.

*If you already have an account number assigned to you, insert it here.

CONTACT:
- --------------------------------------------------------------------------------

CALL OR  VISIT  your  discount  broker,  investment  adviser,  or bank or  other
financial institution.


AUTOMATICALLY:
- --------------------------------------------------------------------------------
Complete  the  AUTOMATIC  INVESTMENT  PLAN option on your  account  application.
Minimum automatic investment is $25.


VIA OUR WEBSITE:
- --------------------------------------------------------------------------------


Visit  the  Spectra  Fund  website  to  download  a new  account  application  -
www.spectrafund.com

Mail completed  application with your investment to Alger Shareholder  Services,
Inc.
================================================================================


================================================================================
To make additional investments in an existing account:
- --------------------------------------------------------------------------------


Class A Share account: contact your broker-dealer
- --------------------------------------------------------------------------------


Class N Share account:

BY MAIL:
- --------------------------------------------------------------------------------
Complete and return the Invest by Mail slip  attached to your Spectra  Statement
and return the slip with your investment to:

      Alger Shareholder Services, Inc.
      30 Montgomery Street
      Jersey City, NJ 07302

BY TELEPHONE OR FED WIRE:
- --------------------------------------------------------------------------------
TELEPURCHASE*  allows you to purchase shares by telephone (minimum $500, maximum
$50,000) by filling out the appropriate  section of the New Account  Application
or returning the Telephone  Services Form.  The funds will be  transferred  from
your designated bank account to your Fund account,  normally within one business
day.

WIRE - Have your bank wire funds to:

State Street Bank & Trust Company. (See wire instructions at left.)

                                             *NOT AVAILABLE FOR RETIREMENT PLANS

CONTACT:
- --------------------------------------------------------------------------------
Call or  visit  your  discount  broker,  investment  adviser,  or bank or  other
financial institution.

AUTOMATICALLY:
- --------------------------------------------------------------------------------
SPECTRA FUND AUTOMATIC INVESTMENT PLAN allows you to make automatic purchases on
the 15th and/or the last  business day of each month.  Fill out the  appropriate
information on the New Account Application or contact Spectra Fund to receive an
Additional Services Form. Minimum automatic investment is $25.

GOVERNMENT  DIRECT DEPOSIT* allows you to arrange direct deposit of U.S. federal
government  payments  into your Spectra Fund account and Payroll  Savings  Plan*
allows you to arrange  direct  deposit of a portion of your payroll  directly to
your Spectra Fund Account. Call for a Payroll Savings Plan Form.

                                             *NOT AVAILABLE FOR RETIREMENT PLANS


VIA OUR WEBSITE:
- --------------------------------------------------------------------------------

Visit the Spectra  Fund  website to download  all forms to add  services to your
account - www.spectrafund.com

Mail your completed forms to Alger Shareholder Services,  Inc. In addition,  you
can perform certain transactions electronically via our website.
================================================================================

6
<PAGE>



REDEMPTION INSTRUCTIONS:
- --------------------------------------------------------------------------------


Class A Shares: contact your broker-dealer
- --------------------------------------------------------------------------------
Class N Shares:

BY MAIL:
- --------------------------------------------------------------------------------

Send a letter of instruction to Alger Shareholder Services, Inc. which includes

    - account number
    - number of shares or dollar  amount of redemption
    - where to send the proceeds
    - signature(s) of registered owner(s)
    - a signature guarantee is required if
         -- your redemption is for more than $25,000; or
         -- you want the check sent  to a different address than the one we have
            on file; or
         -- you want the check to be made  payable  to  someone  other  than the
            registered owner(s) we have on file; or
         -- you have changed your address on file within the past 60 days.

BY TELEPHONE:*
- --------------------------------------------------------------------------------
CALL  800-711-6141  to sell shares  (unless you refuse this  service on your New
Account  Application).  The Fund will send you a check for amounts up to $5,000.
You can choose to receive a check or a wire** for amounts over $5,000. Note: you
cannot  request a check if you have changed your address on file within the past
60 days.

TELEREDEMPTION  allows you to redeem  shares by  telephone  by  filling  out the
appropriate  section of the New Account  Application  or returning the Telephone
Services  Form.  The funds will be transferred to your bank account in an amount
between $500 and $50,000,  normally  within 2 business  days.  Shares  issued in
certificate form are not eligible for this service.

                                             *NOT AVAILABLE FOR RETIREMENT PLANS
               **ONLY IF THE APPROPRIATE SECTION OF THE APPLICATION IS COMPLETED

CONTACT:
- --------------------------------------------------------------------------------

CALL OR  VISIT  your  discount  broker,  investment  adviser,  or bank or  other
financial institution.


AUTOMATICALLY:
- --------------------------------------------------------------------------------
SYSTEMATIC  WITHDRAWAL PLAN allows you to receive regular monthly,  quarterly or
annual payments.  Your account value must be at least $10,000,  and the payments
must be for $50 or more.  The maximum  monthly  withdrawal  is 1% of the current
account value in the Fund at the time you begin participation in the Plan.


VIA OUR WEBSITE:
- --------------------------------------------------------------------------------
Visit  the  Spectra  Fund  website  to  download  all  forms  to add  redemption
privileges to your existing account - www.spectrafund.com.  In addition, you can
now perform certain transactions electronically via our website.

Mail your completed forms to Alger Shareholder Services, Inc.


TO SPEAK WITH A SPECTRA FUND REPRESENTATIVE CALL 1-800-711-6141

e-mail: [email protected]

web address: www.spectrafund.com

Representatives are available to assist you with any questions you have.



                              ==================================================
                                         SIGNATURE GUARANTEE IS A GUARANTEE BY A
                                       FINANCIAL INSTITUTION THAT YOUR SIGNATURE
                                         IS AUTHENTIC. THE FINANCIAL INSTITUTION
                                      ACCEPTS LIABILITY FOR ANY FORGERY OR FRAUD
                                     IF THE SIGNATURE IT GUARANTEES PROVES TO BE
                                    COUNTERFEIT. IT IS AN IDEAL MEANS TO PROTECT
                                 INVESTORS AND THEIR ASSETS. A NOTARIZATION BY A
                                  NOTARY PUBLIC IS NOT AN ACCEPTABLE SUBSTITUTE.
                              ==================================================


Unless your account is a Spectra-sponsored  tax-deferred  retirement plan, if it
falls below $500 because of  redemptions,  the Fund may send you written  notice
providing 60 days to restore it to the minimum balance.  After 60 days, the Fund
may close your account and redeem all of your shares.

Under unusual circumstances,  the Fund may redeem some of your shares "in kind",
which means that some of the proceeds will be paid with securities the Fund owns
instead of cash.

Shares may be worth more or less when you redeem  them than they are at the time
you buy them.  This means that you may  realize a taxable  gain or loss when you
redeem shares.

EXCHANGES

You can exchange  shares of the Fund for shares of Alger Money Market  Portfolio
of The Alger Fund, another portfolio advised by the Manager. If you would like a
prospectus describing the Money Market Portfolio,  please call the Fund at (800)
711-6141. Remember that for tax purposes, an exchange is considered a sale and a
purchase. Thus, you may realize a taxable gain or loss when you exchange shares.


Certain exchange transactions can be performed on our website.  Contact the Fund
for details.


                                                                               7
<PAGE>


[GRAPHIC OMITTED]

FINANCIAL HIGHLIGHTS


The Financial  Highlights  table is intended to help you  understand  the Fund's
financial  performance  for the periods  shown.  The Fund was a closed-end  fund
until February 12, 1996, when it became an open-end investment company.  Certain
information  reflects  financial  results  for a single  Fund  share.  The total
returns in the table  represent  the rate that an investor  would have earned or
lost on an investment in the Fund  (assuming  reinvestment  of all dividends and
distributions).

The  Financial  Highlights  for the fiscal  periods  ended June 30, 1991 through
October  31,  1999  have  been  audited  by  Arthur  Andersen  LLP,  the  Fund's
independent public accountants.  The Financial Highlights, with the exception of
the total  return  information,  for the  period  ended  June 30,  1990 has been
audited by other  independent  accountants,  who have  expressed an  unqualified
opinion  thereon.  Arthur  Andersen  LLP's  report,  along  with  the  financial
statements  of the Fund,  are contained in the Fund's  Annual  Report,  which is
available by contacting  the Fund at (800)  711-6141.

================================================================================
Class N Shares+
For a share outstanding throughout the period (i)
<TABLE>
<CAPTION>
                                 Six Months Ended
                                  April 30, 2000
                                    (unaudited)                             Year Ended December 31,
- ---------------------------------------------------------------------------------------------------------------------------
                                                       1999           1998             1997          1996            1995
                                                    ----------     ----------         ------       --------         ------
<S>                                   <C>           <C>            <C>                <C>          <C>              <C>
Net asset value, beginning of period                     $6.65          $5.74          $4.54          $6.98          $6.27
                                      --------      ----------     ----------         ------       --------         ------
Net investment income (loss)                             (0.07)         (0.02)         (0.06)(iii)    (0.08)(iii)    (0.17)
Net realized and unrealized gain
  (loss) on investments                                   4.22           0.98           1.26           0.41           2.41
                                      --------      ----------     ----------         ------       --------         ------
Total from investment operations                          4.15           0.96           1.20           0.33           2.24
Distributions from net realized gains                    (0.04)         (0.05)            --          (2.77)         (1.53)
                                      --------      ----------     ----------         ------       --------         ------
Net asset value, end of period                          $10.76          $6.65          $5.74          $4.54          $6.98
                                      ========      ==========     ==========         ======       ========         ======
Total return(iv)                                         62.66%         16.94%         26.45%         12.68%         57.72%
                                      ========      ==========     ==========         ======       ========         ======
Ratios and Supplemental Data:
  Net assets, end of period
    (000's omitted)                                   $548,656       $193,039        $84,988        $11,485         $5,374
                                      ========      ==========     ==========         ======       ========         ======
  Ratio of expenses excluding
    interest to average net assets                        1.83%          1.90%
                                      ========      ==========     ==========
  Ratio of expenses including
    interest to average net assets                        1.85%          1.96%          2.12%          2.55%(v)       3.76%
                                      ========      ==========     ==========         ======       ========         ======
  Ratio of net investment income
    (loss) to average net assets                         (1.52)%        (1.24)%        (1.06)%        (1.69)%        (3.05)%
                                      ========      ==========     ==========         ======       ========         ======
  Portfolio Turnover Rate                               102.54%        190.74%        133.98%        197.04%        207.25%
                                      ========      ==========     ==========         ======       ========         ======
  Amount of debt outstanding at
    end of period                                           --       $705,000
                                      ========      ==========     ==========

  Average amount of debt
    outstanding during the period                     $986,981     $1,044,096
                                      ========      ==========     ==========
  Average daily number of shares
    outstanding during the period                   40,946,839     22,865,292
                                      ========      ==========     ==========
  Average amount of debt per share
    during the period________                            $0.02          $0.05
                                      ========        ========       ========
</TABLE>

 +    During the periods shown, shares of the Fund now designated Class N shares
      were the only shares outstanding.

(i)   Per share data has been  adjusted to reflect the effect of a 3 for 1 stock
      split which occurred April 23, 1999.

(ii)  Ratios have been annualized; total return has not been annualized.

(iii) Amount was computed based on average shares outstanding during the year.



8
<PAGE>



  Four
 Months
  Ended
Oct. 31,                           Year Ended June 30,
- --------------------------------------------------------------------------------
1994(ii)       1994         1993           1992          1991           1990
- ------        ------       ------         ------        ------       ------
 $5.71         $6.34        $5.98          $6.50         $6.24        $5.04
- ------        ------       ------         ------        ------       ------
 (0.04)        (0.09)       (0.10)         (0.07)        (0.05)       (0.04)
  0.60          0.89         1.23           0.55          0.75         1.27
- ------        ------       ------         ------        ------       ------
  0.56          0.80         1.13           0.48          0.70         1.23
    --         (1.43)       (0.77)         (1.00)        (0.44)       (0.03)
- ------        ------       ------         ------        ------       ------
 $6.27         $5.71        $6.34          $5.98         $6.50        $6.24
======        ======       ======         ======        ======       ======
  9.93%        17.53%      23.66%          11.65%        15.63%       24.76%(vi)
======        ======       ======         ======        ======       ======

$4,832        $4,394       $4,884         $4,603        $5,006       $4,805
======        ======       ======         ======        ======       ======







  2.75%         2.59%        2.57%          2.14%         2.74%        3.01%
======        ======       ======         ======        ======       ======

 (1.72)%       (1.47)%      (1.55)%        (1.07)%       (0.85)%      (0.76)%
======        ======       ======         ======        ======       ======
 56.24%       116.61%      100.71%         63.54%        78.00%       81.70%
======        ======       ======         ======        ======       ======


(iv)  Distributions paid when the Fund operated as a closed-end fund (i.e. prior
      to February 12, 1996),  have been reflected as being  reinvested at market
      value.

(v)   Amount  has been  reduced  by 0.69%  due to  expense  reimbursements  made
      pursuant to applicable state expense limits.

(vi)  Unaudited.





                                                                               9
<PAGE>


FOR FUND INFORMATION:

By telephone:     1-800-711-6141

By mail:     Spectra Fund
             One World Trade Center
             Suite 9333
             New York, NY 10048

By Internet: Text versions of Fund documents can be
             downloaded from the following sources:
             > The Fund: http://www.spectrafund.com
             > SEC (EDGAR database): http://www.sec.gov

STATEMENT OF ADDITIONAL INFORMATION

For more detailed information about the Fund and its policies,  investments, and
risks,   please  read  the  Statement  of  Additional   Information,   which  is
incorporated by reference into (is legally made a part of) this Prospectus.  You
can get a free copy of the  Statement of Additional  Information  by calling the
Fund's  toll-free  number or by writing to the address  above.  The Statement of
Additional  Information is on file with the Securities and Exchange  Commission.

ANNUAL AND SEMI-ANNUAL REPORTS

Additional  information about the Fund's  investments is available in the Fund's
annual and semi-annual reports to shareholders.  In the Fund's annual report you
will find a discussion of the market  conditions and investment  strategies that
significantly  affected the Fund's  performance during the period covered by the
report.  You can  receive  free  copies of these  reports by calling  the Fund's
toll-free number or by writing to the address above.

Another  way you can review and copy Fund  documents  is by  visiting  the SEC's
Public  Reference Room in Washington,  D.C.  Copies can also be obtained,  for a
duplicating  fee, by E-mail request to  [email protected]  or by writing to the
SEC's Public Reference Section,  Washington,  DC 20549-0102.  Information on the
operation of the Public Reference Room is available by calling 1-202-942-8090.

DISTRIBUTOR: FRED ALGER & COMPANY, INCORPORATED

Spectra Fund
SEC File #811-1743


SP20



      SPECTRA FUND

            CLASS A SHARES
            CLASS N SHARES




       INVESTING IN COMPANIES OF ALL SIZES TO ACHIEVE  CAPITAL APPRECIATION






                                                                      PROSPECTUS
                                                                   JULY   , 2000





      As with all mutual funds,  the Securities and Exchange  Commission has not
      determined if the  information in this Prospectus is accurate or complete,
      nor has it  approved or  disapproved  these  securities.  It is a criminal
      offense to represent otherwise.

      An investment in the Fund is not a deposit of a bank and is not insured or
      guaranteed  by the  Federal  Deposit  Insurance  Corporation  or any other
      government agency.

<PAGE>



STATEMENT OF                                                       July   , 2000
ADDITIONAL INFORMATION

                      |
              SPECTRA | ONE WORLD TRADE CENTER--SUITE 9333
                 FUND | NEW YORK, NEW YORK 10048
                      | (800) 711-6141
                      |


================================================================================


   Spectra  Fund (the  "Fund")  is a  registered  investment  company--a  mutual
fund--that  presently  offers two classes of shares:  Class A shares,  which are
generally subject to a front-end sales charge, and Class N shares, which have no
sales charge.

   This Statement of Additional  Information is not a Prospectus.  This document
contains  additional  information about the Fund and supplements  information in
the Prospectus dated July , 2000. It should be read together with the Prospectus
which may be  obtained  free of charge by  writing  or  calling  the Fund at the
address or toll-free number shown above.

   The Fund's  financial  statements for the year ended October 31, 1999 and for
the six months ended April 30, 2000 are contained in its annual and  semi-annual
reports to shareholders and are incorporated by reference into this Statement of
Additional Information.


                                    CONTENTS


Investment Strategies and Policies ........................................    2
Portfolio Transactions ....................................................    8
Net Asset Value ...........................................................    9
Classes of Shares .........................................................    9
Purchases and Redemptions .................................................    9
Management ................................................................   13
Taxes .....................................................................   16
Custodian and Transfer Agent ..............................................   16
Diversification ...........................................................   16
Certain Shareholders ......................................................   16
Organization ..............................................................   17
Determination of Performance ..............................................   17
Financial Statements ......................................................   18
Appendix ..................................................................  A-1

<PAGE>

INVESTMENT STRATEGIES AND
POLICIES

The Prospectus  discusses the investment objective of the Fund and the principal
strategies  to be employed to achieve  this  objective.  This  section  contains
supplemental   information   concerning   the  types  of  securities  and  other
instruments in which the Fund may invest, the investment  policies and portfolio
strategies  that the Fund may  utilize  and  certain  risks  attendant  to those
investments, policies and strategies.

CASH POSITION

In  order  to  afford  the  Fund  the  flexibility  to  take  advantage  of  new
opportunities for investments in accordance with its investment  objective or to
meet  redemptions,  it may,  under normal  circumstances,  hold up to 15% of its
total  assets  in  money  market  instruments  including,  but not  limited  to,
certificates  of deposit,  time  deposits  and  bankers'  acceptances  issued by
domestic bank and thrift institutions,  U.S. Government  securities,  commercial
paper and  repurchase  agreements.  When  management's  analysis of economic and
technical  market  factors  suggests  that  common  stock  prices  will  decline
sufficiently that a temporary  defensive position is deemed advisable,  the Fund
may invest in  high-grade  senior  securities or U.S.  Government  securities or
retain cash or cash equivalents, all without limitation.

SMALL CAPITALIZATION INVESTMENTS

Certain   companies  in  which  the  Fund  will  invest  may  still  be  in  the
developmental  stage,  may be older  companies  that appear to be entering a new
stage of  growth  progress  owing  to  factors  such as  management  changes  or
development of new technology, products or markets or may be companies providing
products or services with a high unit volume growth rate.  Investing in smaller,
newer issuers  generally  involves  greater risk than investing in larger,  more
established  issuers.  Such companies may have limited product lines, markets or
financial  resources and may lack management  depth.  Their  securities may have
limited  marketability  and may be  subject  to more  abrupt or  erratic  market
movements than securities of larger,  more  established  companies or the market
averages in general.

U.S. GOVERNMENT OBLIGATIONS

Bills,  notes,  bonds, and other debt securities issued by the U.S. Treasury are
direct  obligations  of the U.S.  Government  and differ mainly in the length of
their maturities.

SHORT-TERM CORPORATE DEBT SECURITIES

These are outstanding  nonconvertible corporate debt securities (e.g., bonds and
debentures)  which have one year or less remaining to maturity.  Corporate notes
may have fixed, variable, or floating rates.

COMMERCIAL PAPER

These are  short-term  promissory  notes  issued by  corporations  primarily  to
finance short-term credit needs.

REPURCHASE AGREEMENTS

Under the terms of a repurchase agreement, the Fund would acquire a high quality
money market instrument for a relatively short period (usually not more than one
week)  subject to an  obligation  of the seller to  repurchase,  and the Fund to
resell, the instrument at an agreed price (including accrued interest) and time,
thereby  determining  the yield  during the Fund's  holding  period.  Repurchase
agreements may be seen to be loans by the Fund  collateralized by the underlying
instrument.  This  arrangement  results  in a fixed  rate of return  that is not
subject  to  market  fluctuations  during  the  Fund's  holding  period  and not
necessarily  related  to the rate of return on the  underlying  instrument.  The
value of the underlying securities, including accrued interest, will be at least
equal at all times to the total amount of the repurchase  obligation,  including
interest.  The Fund bears a risk of loss in the event that the other  party to a
repurchase  agreement declares bankruptcy or defaults on its obligations and the
Fund is delayed in or  prevented  from  exercising  its rights to dispose of the
collateral securities,  including the risk of a possible decline in the value of
the  underlying  securities  during the period in which the Fund seeks to assert
these rights,  the risk of incurring  expenses  associated  with asserting these
rights and the risk of losing all or part of the income from the agreement. Fred
Alger Management, Inc. ("Alger Management"), acting under the supervision of the
Fund's  Board of  Trustees,  reviews  the credit  worthiness  of those banks and
dealers with which the Fund enters into repurchase  agreements to evaluate these
risks and monitors on an ongoing  basis the value of the  securities  subject to
repurchase  agreements  to ensure that the value is  maintained  at the required
level.

WARRANTS AND RIGHTS

The Fund may invest in securities  convertible  into or exchangeable  for equity
securities  including  warrants and rights. A warrant is a type of security that
entitles the holder to buy a proportionate amount of common stock at a specified
price,  usually  higher  than the market  price at the time of  issuance,  for a
period of years or to perpetuity. In contrast,  rights, which also represent the
right to buy common shares,  normally have a  subscription  price lower than the
current  market  value  of the  common  stock  and a life of two to four  weeks.
Warrants  are  freely  transferable  and  are  traded  on the  major  securities
exchanges.

PORTFOLIO DEPOSITARY RECEIPTS

To the extent otherwise  consistent with its investment  policies and applicable
law, the Fund may invest up to 5% of its total  assets in  Portfolio  Depositary
Receipts, exchange-traded shares issued by investment compa-

                                      -2-
<PAGE>


nies,  typically unit  investment  trusts,  holding  portfolios of common stocks
designed to replicate  and,  therefore,  track the  performance of various broad
securities indexes or sectors of such indexes.  For example, the Fund may invest
in Standard & Poor's Depositary Receipts(R) (SPDRs), issued by a unit investment
trust  whose  portfolio  tracks the S&P 500  Composite  Stock  Price  Index,  or
Standard & Poor's MidCap 400 Depositary  Receipts(R)  (MidCap SPDRs),  similarly
linked to the S&P MidCap 400 Index.

ILLIQUID AND RESTRICTED SECURITIES

The  Fund  will  not  invest  more  than  15% of its net  assets  in  "illiquid"
securities,  which include restricted securities,  securities for which there is
no readily available market and repurchase agreements with maturities of greater
than 7 days; however,  restricted securities that are determined by the Board of
Trustees to be liquid are not subject to this limitation.

The Fund may invest in  restricted  securities  governed  by Rule 144A under the
Securities  Act of 1933.  In adopting  Rule 144A,  the  Securities  and Exchange
Commission specifically stated that restricted securities traded under Rule 144A
may be treated as liquid for purposes of investment  limitations if the board of
trustees  (or the fund's  adviser  acting  subject to the  board's  supervision)
determines  that the securities are in fact liquid.  The Board has delegated its
responsibility to Alger Management to determine the liquidity of each restricted
security  purchased  pursuant to the Rule,  subject to the Board's oversight and
review.  Examples of factors that will be taken into account in  evaluating  the
liquidity of a Rule 144A security, both with respect to the initial purchase and
on an ongoing basis, will include, among others: (1) the frequency of trades and
quotes for the security;  (2) the number of dealers  willing to purchase or sell
the  security  and  the  number  of  other  potential  purchasers;   (3)  dealer
undertakings  to make a  market  in the  security;  and (4)  the  nature  of the
security  and the nature of the  marketplace  trades  (e.g.,  the time needed to
dispose of the security,  the method of soliciting  offers, and the mechanics of
transfer).  If institutional trading in restricted securities were to decline to
limited  levels,  the  liquidity  of the  Fund's  portfolio  could be  adversely
affected.

SHORT SALES

The Fund may sell securities  "short against the box." While a short sale is the
sale of a  security  the Fund does not own,  it is  "against  the box" if at all
times  when the  short  position  is open the Fund  owns an equal  amount of the
securities  or securities  convertible  into, or  exchangeable  without  further
consideration for, securities of the same issue as the securities sold short.

LENDING OF PORTFOLIO SECURITIES

In order to generate income and to offset expenses,  the Fund may lend portfolio
securities  with a value up to 331U3% of the Fund's total assets,  including all
collateral  for such loans,  less  liabilities  exclusive of the  obligation  to
return such collateral,  to brokers,  dealers and other financial organizations.
The Fund will not lend  securities  to Alger  Management or its  affiliates.  By
lending  its  securities,  the Fund can  increase  its income by  continuing  to
receive  interest or  dividends  on the loaned  securities  as well as by either
investing the cash  collateral in short-term  securities or by earning income in
the form of interest paid by the borrower when U.S.  Government  securities  are
used as collateral.  The Fund will adhere to the following  conditions  whenever
its securities  are loaned:  (a) the Fund must receive at least 100 percent cash
collateral or  equivalent  securities  from the borrower;  (b) the borrower must
increase  this  collateral  whenever the market  value of the loaned  securities
including  accrued  interest  exceeds the value of the collateral;  (c) the Fund
must be able to  terminate  the  loan at any  time;  (d) the Fund  must  receive
reasonable  interest on the loan,  as well as any  dividends,  interest or other
distributions on the loaned securities and any increase in market value; (e) the
Fund may pay only reasonable custodian fees in connection with the loan; and (f)
voting  rights on the  loaned  securities  may pass to the  borrower;  provided,
however, that if a material event adversely affecting the investment occurs, the
Fund's Board of Trustees  must  terminate  the loan and regain the right to vote
the securities.  The Fund bears a risk of loss in the event that the other party
to a stock loan transaction  defaults on its obligations and the Fund is delayed
in or  prevented  from  exercising  its  rights to  dispose  of the  collateral,
including  the  risk  of a  possible  decline  in the  value  of the  collateral
securities during the period in which the Fund seeks to assert these rights, the
risk of incurring  expenses  associated with asserting these rights and the risk
of losing all or a part of the income from the transaction.

FOREIGN SECURITIES

The Fund may  invest  up to 20% of the  value of its  total  assets  in  foreign
securities (not including  American  Depositary  Receipts,  American  Depositary
Shares or U.S.  dollar  denominated  securities  of  foreign  issuers).  Foreign
securities  investments may be affected by changes in currency rates or exchange
control  regulations,  changes in  governmental  administration  or  economic or
monetary  policy (in the United States and abroad) or changed  circumstances  in
dealing  between  nations.  Dividends paid by foreign  issuers may be subject to
withholding  and other  foreign  taxes that may decrease the net return on these
investments as compared to dividends paid to the Fund by domestic  corporations.
There may be less publicly  available  information  about  foreign  issuers than
about  domestic  issuers,  and  foreign  issuers  are  not  subject  to  uniform
accounting,   auditing  and  financial   reporting  standards  and  requirements
comparable to those of domestic issuers.  Securities of some foreign issuers are
less liq-

                                      -3-
<PAGE>


uid and more volatile than securities of comparable domestic issuers and foreign
brokerage  commissions are generally  higher than in the United States.  Foreign
securities  markets may also be less liquid,  more  volatile and subject to less
government  supervision than those in the United States.  Investments in foreign
countries  could be affected by other factors not present in the United  States,
including  expropriation,  confiscatory  taxation and potential  difficulties in
enforcing contractual obligations. Securities purchased on foreign exchanges may
be held in custody by a foreign bank or a foreign branch of a domestic bank.

The Fund may purchase American Depositary Receipts ("ADRs"), American Depositary
Shares ("ADSs") or U.S.  dollar-denominated  securities of foreign issuers which
are not  subject to the 20%  foreign  securities  limitation.  ADRs and ADSs are
traded in U.S.  securities  markets  and  represent  the  securities  of foreign
issuers.  While ADRs and ADSs may not  necessarily  be  denominated  in the same
currency as the foreign securities they represent,  many of the risks associated
with foreign securities may also apply to ADRs and ADSs.

OPTIONS

The Fund may  purchase  put and call  options and sell  (write)  covered put and
covered call options on securities and securities indexes to increase gain or to
hedge against the risk of unfavorable price movements although,  as in the past,
it does not currently intend to rely on these strategies extensively, if at all.

A call  option on a security  is a contract  that gives the holder of the option
the right to buy from the writer  (seller) of the call  option,  in return for a
premium paid, the security  underlying the option at a specified  exercise price
at any time during the term of the option. The writer of the call option has the
obligation  upon exercise of the option to deliver the underlying  security upon
payment  of the  exercise  price  during the  option  period.  A put option on a
security is a contract that, in return for the premium,  gives the holder of the
option the right to sell to the writer  (seller)  the  underlying  security at a
specified  price  during  the term of the  option.  The  writer of the put,  who
receives the premium,  has the  obligation to buy the  underlying  security upon
exercise at the exercise price during the option period.

The Fund will not sell options that are not  covered.  A call option  written by
the Fund on a security is  "covered"  if the Fund owns the  underlying  security
covered by the call or has an  absolute  and  immediate  right to  acquire  that
security  without   additional  cash   consideration  (or  for  additional  cash
consideration held in a segregated account) upon conversion or exchange of other
securities  held in its  portfolio.  A call  option is also  covered if the Fund
holds a call on the same security as the call written  where the exercise  price
of the call  held is (1) equal to or less  than the  exercise  price of the call
written  or (2)  greater  than the  exercise  price of the call  written  if the
difference  is  maintained by the Fund in cash,  U.S.  Government  securities or
other high grade short-term obligations in a segregated account. A put option is
"covered" if the Fund maintains cash or other high grade short-term  obligations
with a value equal to the exercise price in a segregated account or else holds a
put on the same security as the put written where the exercise  price of the put
held is equal to or greater than the exercise price of the put written.

If the Fund has written an option,  it may terminate its obligation by effecting
a closing purchase transaction.  This is accomplished by purchasing an option of
the same series as the option  previously  written.  However,  once the Fund has
been  assigned an exercise  notice,  the Fund will be unable to effect a closing
purchase transaction.  Similarly,  if the Fund is the holder of an option it may
liquidate  its  position  by  effecting  a  closing  sale  transaction.  This is
accomplished  by selling an option of the same  series as the option  previously
purchased.  There can be no  assurance  that  either a closing  purchase or sale
transaction can be effected when the Fund so desires.

The Fund will  realize a profit from a closing  transaction  if the price of the
transaction is less than the premium received from writing the option or is more
than the premium paid to purchase the option;  the Fund will realize a loss from
a closing  transaction if the price of the  transaction is less than the premium
paid to  purchase  the  option.  Since  call  option  prices  generally  reflect
increases in the price of the underlying  security,  any loss resulting from the
repurchase of a call option may also be wholly or partially offset by unrealized
appreciation of the underlying  security.  Other principal factors affecting the
market  value of a put or a call  option  include  supply and  demand,  interest
rates, the current market price and price volatility of the underlying  security
and the time remaining until the expiration date.

An option  position  may be closed  out only on an  exchange  which  provides  a
secondary  market  for an  option  of the same  series.  Although  the Fund will
generally not purchase or write options that appear to lack an active  secondary
market, there is no assurance that a liquid secondary market on an exchange will
exist for any particular option. In such event it might not be possible to

                                      -4-
<PAGE>


effect closing  transactions in particular  options, so that the Fund would have
to exercise its option in order to realize any profit and would incur  brokerage
commissions  upon the  exercise of the options.  If the Fund,  as a covered call
option writer, is unable to effect a closing purchase transaction in a secondary
market,  it will not be able to sell the  underlying  security  until the option
expires or it delivers the underlying security upon exercise or otherwise covers
the position.

In addition to options on  securities,  the Fund may also purchase and sell call
and put options on securities indexes. A stock index reflects in a single number
the market value of many different  stocks.  Relative values are assigned to the
stocks included in an index and the index  fluctuates with changes in the market
values of the stocks.  The  options  give the holder the right to receive a cash
settlement  during the term of the option  based on the  difference  between the
exercise price and the value of the index.  By writing a put or call option on a
securities index, the Fund is obligated,  in return for the premium received, to
make  delivery of this  amount.  The Fund may offset its position in stock index
options  prior to  expiration  by  entering  into a  closing  transaction  on an
exchange or it may let the option expire unexercised.

Use of  options  on  securities  indexes  entails  the risk that  trading in the
options  may be  interrupted  if trading in certain  securities  included in the
index is  interrupted.  The Fund will not purchase  these  options  unless Alger
Management is satisfied with the development,  depth and liquidity of the market
and Alger Management believes the options can be closed out.

Price  movements  in the Fund's  securities  may not  correlate  precisely  with
movements in the level of an index and, therefore, the use of options on indexes
cannot  serve as a complete  hedge and will depend,  in part,  on the ability of
Alger  Management to predict  correctly  movements in the direction of the stock
market  generally or of a particular  industry.  Because  options on  securities
indexes require  settlement in cash, Alger Management may be forced to liquidate
portfolio securities to meet settlement obligations.

Although Alger Management will attempt to take appropriate  measures to minimize
the risks relating to any trading by the Fund in put and call options, there can
be no  assurance  that the Fund will  succeed in any option  trading  program it
undertakes.

The Fund will not purchase  options if, as a result,  the aggregate  cost of all
outstanding  options  exceeds 10% of the Fund's total  assets,  although no more
than  5%  will  be  committed  to  transactions  entered  into  for  non-hedging
(speculative) purposes.

STOCK INDEX FUTURES AND OPTIONS ON STOCK INDEX FUTURES

Futures are generally  bought and sold on the  commodities  exchanges where they
are listed with payment of initial and variation  margin as described below. The
sale of a futures contract creates a firm obligation by the Fund, as seller,  to
deliver  to the  buyer  the net cash  amount  called  for in the  contract  at a
specific  future  time.  Put options on futures  might be  purchased  to protect
against  declines in the market values of securities  occasioned by a decline in
stock prices and  securities  index futures  might be sold to protect  against a
general  decline in the value of securities of the type that comprise the index.
Options on futures contracts are similar to options on securities except that an
option on a futures  contract  gives the  purchaser  the right in return for the
premium paid to assume a position in a futures contract and obligates the seller
to deliver such position.

A stock index future obligates the seller to deliver (and the purchaser to take)
an amount of cash equal to a specific dollar amount times the difference between
the value of a specific  stock index at the close of the last trading day of the
contract and the price at which the agreement is made.  No physical  delivery of
the underlying  stocks in the index is made.  While incidental to its securities
activities,  the Fund may use index  futures as a  substitute  for a  comparable
market position in the underlying securities.

If the Fund uses futures, or options thereon, for hedging, the risk of imperfect
correlation increases as the composition of the Fund varies from the composition
of the stock index. In an effort to compensate for the imperfect  correlation of
movements in the price of the securities being hedged and movements in the price
of the stock index futures, the Fund may, if it uses a hedging strategy,  buy or
sell stock index futures contracts in a greater or lesser dollar amount than the
dollar amount of the securities being hedged if the historical volatility of the
stock index futures has been less or greater than that of the  securities.  Such
"over hedging" or "under hedging" may adversely affect the Fund's net investment
results  if  market   movements  are  not  as  anticipated  when  the  hedge  is
established.

An option on a stock  index  futures  contract,  as  contrasted  with the direct
investment in such a contract,  gives the purchaser the right, in return for the
premium  paid,  to assume a position  in a stock  index  futures  contract  at a
specified exercise price at any time prior to the expiration date of the option.
The Fund will sell  options on stock  index  futures  contracts  only as part of
closing purchase  transactions to terminate its options positions.  No assurance
can be given that such closing

                                      -5-
<PAGE>


transactions  can be effected or that there will be  correlation  between  price
movements  in the options on stock  index  futures  and price  movements  in the
Fund's  securities  which are the subject of the hedge. In addition,  the Fund's
purchase of such options will be based upon predictions as to anticipated market
trends, which could prove to be inaccurate.

The Fund's use, if any, of stock index  futures and options  thereon will in all
cases be consistent with applicable  regulatory  requirements  and in particular
the rules and regulations of the Commodity  Futures Trading  Commission and will
be entered into only, if at all, for bona fide hedging, risk management or other
portfolio  management  purposes.  Typically,  maintaining a futures  contract or
selling an option  thereon  will  require  the Fund to deposit  with a financial
intermediary  as  security  for its  obligations  an  amount  of  cash or  other
specified  assets (initial margin) which initially is typically 1% to 10% of the
face  amount  of  the  contract  (but  may be  higher  in  some  circumstances).
Additional  cash or assets  (variation  margin) may be required to be  deposited
thereafter  on a  daily  basis  as the  mark to  market  value  of the  contract
fluctuates. The purchase of an option on stock index futures involves payment of
a premium for the option without any further obligation on the part of the Fund.
If the Fund  exercises  an option on a futures  contract it will be obligated to
post  initial  margin  (and  potential  subsequent  variation  margin)  for  the
resulting futures position just as it would for any position.  Futures contracts
and  options  thereon  are  generally  settled by  entering  into an  offsetting
transaction but there can be no assurance either that the position can be offset
prior to settlement at an  advantageous  price,  or that delivery will occur. In
order  to cover  its  potential  obligations  if the Fund  enters  into  futures
contracts or options thereon,  the Fund will maintain a segregated account which
will contain only liquid  assets in an amount equal to the total market value of
such  futures  contracts  less the amount of initial  margin on deposit for such
contracts.

The Fund will not enter into a futures  contract or related  option  (except for
closing transactions) if, immediately  thereafter,  the sum of the amount of its
initial margin and premiums on open futures  contracts and options thereon would
exceed 5% of the Fund's total assets (taken at current value);  however,  in the
case of an  option  that  is  in-the-money  at the  time  of the  purchase,  the
in-the-money amount may be excluded in calculating the 5% limitation.

BORROWING

The  Fund  may  borrow  money  from  banks  and  use it to  purchase  additional
securities.  This  borrowing is known as leveraging.  Leveraging  increases both
investment   opportunity  and  investment  risk.  If  the  investment  gains  on
securities purchased with borrowed money exceed the cost of borrowing, including
interest  paid on the  borrowing,  the net asset value of the Fund's shares will
rise  faster  than  would  otherwise  be the  case.  On the other  hand,  if the
investment gains fail to cover the cost (including  interest) of borrowings,  or
if there are  losses,  the net asset value of the Fund's  shares  will  decrease
faster than would otherwise be the case. The Fund may also borrow from banks for
temporary or  emergency  purposes.  The Fund is required to maintain  continuous
asset coverage (that is, total assets  including  borrowings,  less  liabilities
exclusive of borrowings) of 300% of the amount borrowed.  If such asset coverage
should decline below 300% as a result of market  fluctuations  or other reasons,
the Fund may be required to sell some of its  portfolio  holdings  within  three
days to reduce the debt and restore the 300% asset coverage,  even though it may
be  disadvantageous  from an investment  standpoint  to sell  securities at that
time.

INVESTMENT RESTRICTIONS

Under  the  Investment   Company  Act  of  1940,  as  amended  (the  "Act"),   a
"fundamental"  policy may not be changed  without the vote of a "majority of the
outstanding  voting  securities" of the Fund, which is defined in the Act as the
lesser of (a) 67 percent or more of the shares  present at a Fund meeting if the
holders  of more  than 50  percent  of the  outstanding  shares  of the Fund are
present or represented  by proxy or (b) more than 50 percent of the  outstanding
shares.   The  Fund's   investment   objective  is  a  fundamental   policy.   A
"nonfundamental policy" may be changed by vote of a majority of the Fund's Board
of Trustees at any time.

As a matter of fundamental policy, the Fund may not:

1. Issue senior  securities,  except in connection with borrowings  permitted in
restriction 4 and except that the writing of covered  options on securities  and
stock  indexes,  and  transactions  in stock index futures and options  thereon,
shall not be deemed to be the issuance of a senior security.

2. Purchase securities on margin; but it may obtain such short-term credits from
banks  as may  be  necessary  for  the  clearance  of  purchases  and  sales  of
securities.

                                      -6-
<PAGE>


3. Make short sales of securities or maintain a short  position  unless,  at all
times when a short position is open, it owns an equal amount of such  securities
or owns securities  convertible into or exchangeable for, without payment of any
further consideration, securities of the same issuer at least equal in amount to
the securities sold short.

4. Borrow  money,  except  that the Fund may borrow  from banks if,  immediately
after such  borrowing the value of the total assets of the Fund  (including  the
amount  borrowed) less its liabilities (not including any borrowing) is at least
300% of the amount of the borrowings.

5. Pledge,  mortgage,  hypothecate  or otherwise  encumber its assets  except in
connection with permissible borrowings or investments.

6. Act as a securities underwriter, or act as a distributor of securities issued
by it except through an underwriter,  acting as principal or agent,  who may not
be obligated to sell or take up any specific  amount of securities,  except that
the Fund might be deemed an  underwriter  within the meaning of Section 2(11) of
the Securities  Act of 1933 in making sales of securities  not registered  under
Federal Securities law.

7.  Participate on a joint or joint and several basis in any securities  trading
account.

8. Make any investment in a particular industry if, immediately after the making
of such investment,  25% or more of the Fund's total assets would be invested in
such industry.

9. Purchase or sell real estate or interests  therein or real estate  mortgages,
provided  that  the Fund  may  purchase  marketable  securities  of real  estate
investment trusts.

10. Purchase or sell commodities or commodity contracts,  nor invest in oil, gas
or other mineral  exploration  development  programs,  including mineral leases,
except  that the Fund may  purchase or sell stock index  futures  contracts  and
related options thereon if, thereafter,  no more than 5% of its total assets are
invested in margin and premiums.

11. Make loans to others,  except through purchasing qualified debt obligations,
lending its securities or entering into repurchase agreements.

12. Make any investment in warrants or rights if,  immediately  after the making
of such  investment,  more than 5% of the Fund's net assets would be so invested
or more than 2% of the Fund's net  assets  would be  invested  in  warrants  not
listed on a recognized domestic stock exchange, provided, however, that warrants
or rights  which are  attached  to other  securities  shall be deemed to have no
value for purposes hereof.

13. Purchase or retain the securities of any issuer, if, to the knowledge of the
Treasurer of the Fund,  those  officers and directors of the Fund or the Adviser
owning  individually  more  than  1U2 of 1% of the  securities  of  such  issuer
together own more than 5% of the securities of such issuer.

14. Purchase any security if, as a result, the Fund would then have more than 5%
of its total assets invested in securities of issuers  (including  predecessors)
that  have  been in  continuous  operation  for  less  than  three  years.  This
limitation shall not apply to investments in obligations issued or guaranteed by
the U.S. Government, its agencies or instrumentalities.

15. Purchase the securities of any other investment company,  except that it may
make such a purchase in the open market  involving no  commission or profit to a
sponsor or dealer (other than the customary broker's commission),  provided that
not more than 5% of the Fund's  total assets  (taken at market or other  current
value) would be invested in such securities  immediately after the making of any
such  investment,  or the Fund may make  such a  purchase  as part of a  merger,
consolidation or acquisition of assets.

16. The Fund may purchase  and sell  (write) put and call options on  securities
and stock indexes,  but only if such options are exchange-traded or traded on an
automated  quotation  system of a  national  securities  association;  provided,
however, that options on securities written by the Fund must be covered.

The following restriction is nonfundamental:

17.  The Fund may not  invest  more  than 15% of its net  assets  in  repurchase
agreements  which have a maturity of longer than seven days or in other illiquid
securities, including securities that are illiquid by virtue of the absence of a
readily available market or legal or contractual restrictions on resale.

Except in the case of the 300%  limitation  set forth in Investment  Restriction
No. 4, the percentage  limitations contained in the foregoing restrictions apply
at

                                      -7-
<PAGE>


the time of the purchase of the  securities  and a later increase or decrease in
percentage  resulting  from a change in the values of the  securities  or in the
amount of the Fund's assets will not constitute a violation of the restriction.


PORTFOLIO TRANSACTIONS


Decisions to buy and sell  securities and other  financial  instruments  for the
Fund are made by Alger  Management,  which also is responsible for placing these
transactions,  subject to the overall  review of the Fund's  Board of  Trustees.
Although  investment  requirements for the Fund are reviewed  independently from
those of the other accounts managed by Alger Management, investments of the type
the Fund may make may also be made by these  other  accounts.  When the Fund and
one or more other  accounts  managed by Alger  Management are prepared to invest
in, or desire to dispose of, the same  security or other  financial  instrument,
available  investments or opportunities  for sales will be allocated in a manner
believed by Alger  Management  to be  equitable  to each.  In some  cases,  this
procedure  may affect  adversely  the price paid or  received by the Fund or the
size of the position obtained or disposed of by the Fund.

Transactions  in equity  securities  are in many cases  effected  on U.S.  stock
exchanges and involve the payment of negotiated brokerage commissions.  There is
generally  no  stated  commission  in  the  case  of  securities  traded  in the
over-the-counter markets, but the prices of those securities include undisclosed
commissions  or mark-ups.  Purchases and sales of money market  instruments  and
debt  securities  usually  are  principal  transactions.  These  securities  are
normally  purchased  directly from the issuer or from an  underwriter  or market
maker for the  securities.  The cost of securities  purchased from  underwriters
includes  an  underwriting  commission  or  concession  and the  prices at which
securities are purchased from and sold to dealers include a dealer's  mark-up or
mark-down.  U.S. Government securities are generally purchased from underwriters
or dealers,  although certain  newly-issued  U.S.  Government  securities may be
purchased  directly  from  the  U.S.  Treasury  or from the  issuing  agency  or
instrumentality.

To the extent consistent with applicable provisions of the Act and the rules and
exemptions  adopted  by the  Securities  and  Exchange  Commission  (the  "SEC")
thereunder,  as well as  other  regulatory  requirements,  the  Fund's  Board of
Trustees has determined  that portfolio  transactions  will be executed  through
Fred Alger & Company,  Incorporated  ("Alger Inc.") if, in the judgment of Alger
Management,  the use of Alger Inc. is likely to result in price and execution at
least  as  favorable  as  those of other  qualified  broker-dealers  and if,  in
particular transactions, Alger Inc. charges the Fund a rate consistent with that
charged  to   comparable   unaffiliated   customers  in  similar   transactions.
Over-the-counter  purchases and sales are  transacted  directly  with  principal
market makers except in those cases in which better prices and executions may be
obtained elsewhere.  Principal transactions are not entered into with affiliates
of the Fund except pursuant to exemptive rules or orders adopted by the SEC.

In  selecting  brokers  or  dealers to  execute  portfolio  transactions,  Alger
Management seeks the best overall terms available. In assessing the best overall
terms available for any transaction,  Alger Management will consider the factors
it deems relevant,  including the breadth of the market in the  investment,  the
price of the investment, the financial condition and execution capability of the
broker or dealer  and the  reasonableness  of the  commission,  if any,  for the
specific transaction and on a continuing basis. In addition, Alger Management is
authorized,  in  selecting  parties to execute a particular  transaction  and in
evaluating  the best overall  terms  available,  to consider the  brokerage  and
research services, as those terms are defined in section 28(e) of the Securities
Exchange Act of 1934,  provided to the Fund and/or the other accounts over which
Alger Management or its affiliates exercise investment discretion. The Fund will
consider sales of its shares as a factor in the selection of  broker-dealers  to
execute over-the-counter transactions, subject to the requirements of best price
and execution.  Alger  Management's  fees under its agreements with the Fund are
not reduced by reason of its  receiving  brokerage  and  research  service.  The
Fund's Board of Trustees will  periodically  review the commissions  paid by the
Fund to determine if the commissions  paid over  representative  periods of time
are  reasonable  in relation  to the  benefits  inuring to the Fund.  During the
fiscal years ended October 31, 1999, October 31, 1998, and October 31, 1997, the
Fund paid an aggregate of approximately  $505,953,  $569,102,  and $128,857,  in
brokerage commissions, of which approximately $504,630,  $562,849, and $127,576,
respectively,  was paid to Alger Inc. The commissions  paid to Alger Inc. during
the  fiscal  year  ended  October  31,  1999  constituted  99% of the  aggregate
brokerage  commissions paid by the Fund;  during that year, 99% of the aggregate
dollar  amount of  transactions  by the Fund  involving the payment of brokerage
commissions  was  effected  through  Alger Inc.  Alger  Inc.  does not engage in
principal transactions with the Fund and, accordingly, received no compen-

                                      -8-
<PAGE>


sation in connection  with  securities  purchased or sold in that manner,  which
include  securities  traded  in  the  over-the-counter   markets,  money  market
investments and most debt securities.

NET ASSET VALUE

The New York Stock  Exchange  ("NYSE") is generally  open on each Monday through
Friday,  except New Year's Day, Dr. Martin Luther King, Jr. Day, Presidents' Day
(the third Monday in  February),  Good Friday,  Memorial Day (the last Monday in
May), Independence Day, Labor Day (the first Monday in September),  Thanksgiving
Day (the fourth Thursday in November) and Christmas Day.

The assets of the Fund are generally  valued on the basis of market  quotations.
Securities whose principal  market is on an exchange or in the  over-the-counter
market  are  valued at the last  reported  sales  price or,  in the  absence  of
reported  sales,  at the mean between the bid and asked price or, in the absence
of a recent bid or asked price,  the  equivalent as obtained from one or more of
the major market makers for the  securities to be valued.  Bonds and other fixed
income  securities  may be valued on the basis of prices  provided  by a pricing
service when the Fund's Board of Trustees believes that these prices reflect the
fair  market  value of the  securities.  Other  investments  and  other  assets,
including  restricted  securities and securities for which market quotations are
not readily available, are valued at fair value under procedures approved by the
Fund's Board of Trustees.  Short-term  securities  with maturities of 60 days or
less are valued at amortized cost, which constitutes fair value as determined by
the Fund's Board of Trustees.


CLASSES OF SHARES

As  described  in the  Prospectus,  the Fund has two classes of shares:  Class A
shares,  which are generally  subject to a front-end  load,  and Class N shares,
which are not subject to a load.  Exchanges  cannot be made between  Class A and
Class N shares.  From  time to time,  Alger  Inc.  may  reallow  to  brokers  or
financial intermediaries all or substantially all of the initial sales charge on
a purchase of Class A shares. To the extent that it does so, such persons may be
deemed to be  underwriters of the Fund as defined in the Securities Act of 1933,
as amended.


PURCHASES AND REDEMPTIONS

Shares of the Fund are offered continuously by the Fund and are distributed on a
best efforts basis by Alger Inc. as principal  underwriter for the Fund pursuant
to  a  distribution   agreement  (the  "Distribution   Agreement").   Under  the
Distribution  Agreement,  Alger Inc. bears all selling  expenses,  including the
costs of  advertising  and of printing  prospectuses  and  distributing  them to
prospective shareholders.  Each of the officers of the Fund and Messrs. David D.
Alger and Fred M. Alger III, Trustees of the Fund, are "affiliated  persons," as
defined in the Act, of the Fund and of Alger Inc.


Third Party checks will not be honored except in the case of employer  sponsored
retirement plans. You will be charged a fee for any check returned by your bank.


The right of  redemption  of shares of the Fund may be  suspended or the date of
payment  postponed for more than seven days (a) for any periods during which the
New York Stock Exchange is closed (other than for customary  weekend and holiday
closings),  (b) when  trading  in the  markets  the Fund  normally  utilizes  is
restricted, or an emergency, as defined by the rules and regulations of the SEC,
exists,  making disposal of the Fund's  investments or  determination of its net
asset value not reasonably  practicable or (c) for such other periods as the SEC
by order may permit for protection of the Fund's shareholders.

No interest  will accrue on amounts  represented  by  uncashed  distribution  or
redemption checks.

PURCHASES THROUGH PROCESSING ORGANIZATIONS

You  can  buy  shares   through  a   "Processing   Organization",   which  is  a
broker-dealer, bank or other financial institution that purchases shares for its
customers.  When shares are  purchased  this way, the  Processing  Organization,
rather  than its  customer,  may be the  shareholder  of record  of the  shares.
Processing  Organizations  may impose charges and restrictions in addition to or
different from those applicable if you invest with the Fund directly. Therefore,
you  should  read the  materials  provided  by the  Processing  Organization  in
conjunction with the Prospectus.  Certain  Processing  Organizations may receive
compensation from the Fund, Alger Inc., or any of its affiliates.


AUTOMATIC INVESTMENT PLAN (CLASS N SHARES)


Purchases  into your account will be made on the fifteenth  and/or last business
day of each month.  If the fifteenth  falls on a weekend or a NYSE holiday,  the
purchase shall be made on the next business day. In order to  participate,  your
account  must be held by a bank  which is a  member  of the  Automated  Clearing
House.  Please note that  transfers  from your bank account to a fund  sponsored
retirement account will be considered current year contributions.

                                      -9-
<PAGE>



While  there  is no  charge  to  shareholders  for this  service,  a fee will be
deducted from a shareholder's Fund account in the case of insufficient  funds. A
shareholder's  Automatic  Investment  Plan may be terminated at any time without
charge or penalty by the shareholder, the Fund, the Transfer Agent or Alger Inc.
Class A Share purchases will remain subject to the initial sales charge.

TELEPURCHASE AND TELEREDEMPTION (CLASS N SHARES)


You can apply for  TelePurchase  or  TeleRedemption  by  completing  a Telephone
Services  Form and  returning  it to the  Transfer  Agent.  Although the Fund is
authorized to charge a fee of $17 for each automated  Clearing House redemption,
it does not currently intend to do so. To use these  privileges,  your bank must
be a  member  of the  automated  Clearing  House.  Shares  held  in any  Spectra
retirement plan and shares issued in certificate  form are not eligible for this
service.


RIGHT OF ACCUMULATION (CLASS A SHARES)

Class A Shares of the Fund may be purchased by "any person"  (which  includes an
individual, his or her spouse and children, or a trustee or other fiduciary of a
single trust,  estate or single fiduciary  account) at a reduced sales charge as
determined by aggregating  the dollar amount of the new purchase and the current
value  (at  offering  price) of all Class A Shares of the Fund then held by such
person and applying the sales charge  applicable to such aggregate.  In order to
obtain such discount,  the purchaser must provide sufficient  information at the
time of purchase to permit  verification  that the  purchase  qualifies  for the
reduced sales charge.  The right of  accumulation  is subject to modification or
discontinuance at any time with respect to all shares purchased thereafter.

LETTER OF INTENT (CLASS A SHARES)

A Letter of Intent ("LOI") contemplating aggregate purchases of $100,000 or more
provides an  opportunity  for an investor  to obtain a reduced  sales  charge by
aggregating  investments  over a 13-month  period,  provided  that the  investor
refers to such LOIwhen  placing  orders.  For  purposes of a LOI, the  "Purchase
Amount" as referred to in the preceding sales charge table includes purchases by
"any person" (as defined above) of all Class A Shares of the Fund offered with a
sales charge over the  following  13 months.  An  alternative  is to compute the
13-month period starting up to 90 days before the date of execution of the LOI.

The minimum initial investment under the LOI is 5% of the total LOI amount. Each
investment made during the period  receives the reduced sales charge  applicable
to the total amount of the investment  goal.  Shares purchased with the first 5%
of the total  LOIamount  will be held in escrow by the Transfer  Agent to assure
any necessary payment of a higher applicable sales charge if the investment goal
is not met. If the goal is not achieved within the period, the investor must pay
the  difference  between the sales charges  applicable to the purchases made and
the charges previously paid, or an appropriate number of escrowed shares will be
redeemed.


SIGNATURE GUARANTEES

The Transfer Agent will accept a signature  guarantee by the following financial
institutions:  a U.S. bank, trust company,  broker, dealer, municipal securities
broker or dealer,  government securities broker or dealer, credit union which is
authorized  to  provide  signature  guarantees,  national  securities  exchange,
registered securities association or clearing agency.


SELLING SHARES BY TELEPHONE (CLASS N SHARES)


The Fund, the Transfer  Agent and their  affiliates are not liable for acting in
good faith on telephone  instructions  relating to your account, so long as they
follow  reasonable  procedures to determine that the telephone  instructions are
genuine. Such procedures may include recording the telephone calls and requiring
some  form of  personal  identification.  You  should  verify  the  accuracy  of
telephone transactions immediately upon receipt of your confirmation statement.

Redemption  requests  generally  will be paid on the  next  business  day.  This
service is not available within 60 days of changing your address or bank account
of record.

EXCHANGE PRIVILEGE


Shareholders  may  exchange  shares of the Fund for shares of Alger Money Market
Portfolio of The Alger Fund (the  "Portfolio"),  another  mutual fund managed by
Alger  Management,  and conversely may also exchange shares of the Portfolio for
Fund  shares.  Portfolio  shares  acquired  in  such  exchanges,  together  with
Portfolio shares acquired through  reinvestment of dividends on such shares, may
be exchanged for shares of the Fund,  but only for Fund shares of the same class
as those  originally  exchanged for Portfolio  shares.  These  exchanges will be
effected  at the  respective  net asset  values of the Fund and  Portfolio  next
determined  after the  exchange  request is  accepted,  with no sales  charge or
transaction  fee imposed.  A 1% CDSC will be assessed on  redemptions of Class A
Shares of the Fund  purchased  in an amount of $1 million or more which have not
been subject to the


                                      -10-
<PAGE>



Class's  initial  sales charge and which have not been held for a full year (see
"Contingent  Deferred  Sales  Charge,"  below),  and on redemptions of Portfolio
shares acquired in exchange for such shares,  based solely on the period of time
the shares are retained in the Fund. Thus, the period of time shares are held in
the  Portfolio  will not be  counted  towards  the  one-year  holding  period in
determining whether the shares are subject to a CDSC.


Shares of the Portfolio received in an exchange will earn dividends beginning on
the next  business day after the  exchange.  Before  exchanging  Fund shares for
Portfolio shares, an investor should carefully read a Prospectus  describing the
Portfolio.  To obtain a Prospectus for The Alger Fund and more information about
such  exchanges,  please call (800)  711-6141.  The Fund  reserves  the right to
terminate or modify this exchange privilege or to charge a per-exchange fee upon
notice to shareholders.

For tax  purposes,  an  exchange  of shares is  treated  as a sale of the shares
exchanged and therefore you may realize a taxable gain or loss when you exchange
shares.


SYSTEMATIC WITHDRAWAL PLAN (CLASS N SHARES)


A  systematic   withdrawal  plan  (the   "Withdrawal   Plan")  is  available  to
shareholders  who own shares of the Fund with a value exceeding  $10,000 and who
wish to receive specific amounts of cash  periodically.  Withdrawals of at least
$50 monthly (but no more than one percent of the value of a shareholder's shares
in the Fund) may be made under the  Withdrawal  Plan by redeeming as many shares
of the Fund as may be necessary to cover the stipulated  withdrawal  payment. To
the extent that withdrawals exceed dividends,  distributions and appreciation of
a shareholder's  investment in the Fund,  there will be a reduction in the value
of the shareholder's investment and continued withdrawal payments may reduce the
shareholder's  investment and ultimately exhaust it. Withdrawal  payments should
not be considered as income from investment in a Fund.


Shareholders  who wish to participate in the Withdrawal  Plan and who hold their
shares in  certificated  form must deposit their share  certificates of the Fund
from which  withdrawals will be made with Alger Shareholder  Services,  Inc., as
agent for Withdrawal Plan members.  All dividends and distributions on shares in
the  Withdrawal  Plan  are  automatically  reinvested  at  net  asset  value  in
additional  shares  of  the  Fund.  For  additional  information  regarding  the
Withdrawal Plan, contact the Fund.

REDEMPTIONS IN KIND

Payment for shares tendered for redemption is ordinarily made in cash.  However,
if the Board of Trustees of the Fund  determines that it would be detrimental to
the best interest of the remaining shareholders of the Fund to make payment of a
redemption  order  wholly  or partly  in cash,  the Fund may pay the  redemption
proceeds in whole or in part by a distribution  "in kind" of securities from the
Fund, in lieu of cash, in conformity with applicable  rules of the SEC. The Fund
has elected to be  governed  by Rule 18f-1 under the Act,  pursuant to which the
Fund is obligated to redeem  shares  solely in cash up to the lesser of $250,000
or 1% of the net  assets  of the  Fund  during  any  90-day  period  for any one
shareholder.  If shares are redeemed in kind,  the redeeming  shareholder  might
incur brokerage or other costs in selling the securities for cash. The method of
valuing  securities  used to make  redemptions  in kind  will be the same as the
method the Fund uses to value its portfolio  securities  and such valuation will
be made as of the time the redemption price is determined.

CONTINGENT DEFERRED SALES CHARGE

Certain  Class A Shares of the Fund are subject to a CDSC.  Those Class A Shares
purchased  in an amount of $1 million or more which have not been subject to the
Class's  initial  sales  charge and which have not been held for a full year are
subject to a CDSC of 1% at the time of redemption.

Redemptions of Fund shares are deemed to be made first from amounts,  if any, to
which a CDSC does not apply.  There is no CDSC on redemptions of (i) shares that
represent  appreciation on your original  investment,  or (ii) shares  purchased
through reinvestment of dividends and capital gains.

WAIVERS OF SALES CHARGES

No  initial  sales  charge  or CDSC is  imposed  on Class A share  purchases  or
redemptions  (1) by (i) employees of Alger Inc. and its  affiliates,  (ii) IRAs,
Keogh Plans and employee  benefit plans for those  employees and (iii)  spouses,
children,  siblings  and  parents of those  employees  and trusts of which those
individuals  are  beneficiaries,  as long as orders  for the shares on behalf of
those  individuals and trusts were placed by the employees;  (2) by (i) accounts
managed by investment  advisory  affiliates  of Alger Inc.  that are  registered
under  the  Investment  Advisers  Act  of  1940,  as  amended,  (ii)  employees,
participants and  beneficiaries  of those accounts,  (iii) IRAs, Keogh Plans and
employee benefit plans for those employees,  participants and  beneficiaries and
(iv)  spouses  and  minor  children  of  those   employees,   participants   and
beneficiaries as long as orders for the shares


                                      -11-
<PAGE>



were placed by the employees,  participants and beneficiaries;  (3) by directors
or  trustees  of any  investment  company  for which  Alger  Inc.  or any of its
affiliates  serves as  investment  adviser or  distributor;  (4) of shares  held
through  defined  contribution  plans as defined by ERISA;  (5) by an investment
company  registered under the 1940 Act in connection with the combination of the
investment  company  with the Fund by  merger,  acquisition  of assets or by any
other transaction;  (6) by registered investment advisers or their own accounts;
(7) on behalf of their clients by registered  investment advisers,  banks, trust
companies and other financial institutions,  including broker-dealers with which
either the Fund or Alger Inc.  has entered  into  agreements  contemplating  the
waiver of such charges;  (8) by a Processing  Organization,  as  shareholder  of
record on behalf of (i) investment  advisers or financial  planners  trading for
their own accounts or the accounts of their clients and who charge a management,
consulting  or other fee for  their  services  and  clients  of such  investment
advisers or  financial  planners  trading for their own accounts if the accounts
are linked to the master account of such investment adviser or financial planner
on the books and records of the Processing Organization; and (ii) retirement and
deferred  compensation  plans  and  trusts  used to  fund  those  plans;  (9) by
registered  representatives  or broker-dealers  which have entered into Selected
Dealer  Agreements  with Alger Inc., and their spouses,  children,  siblings and
parents;  and (10) shares  purchased with the proceeds of a redemption of shares
of a mutual  fund not  managed by Alger  Management,  if an initial or  deferred
sales charge was paid in  connection  with the  investment in the other fund and
the  redemption  from the other fund occurred  within 90 days of the purchase of
Fund shares.

In  addition,  no initial  sales  charge will be imposed on purchases of Class A
Shares by members of a "qualified  group".  A qualified group is one which:  (i)
has been in existence  for more than six months;  (ii) was not organized for the
purpose of buying shares of the Fund or making  similar  investments;  and (iii)
satisfies  uniform criteria  established by Alger Inc. that result in economy of
sales effort or expense,  such as a criterion  that  purchases be made through a
central  administration  or through a single dealer.  A qualified group does not
include a group whose sole organizational  connection is participation as credit
card holders of a company,  policyholders of an insurance company,  customers of
either a bank or broker- dealer,  clients of an investment  adviser or a similar
connection.  Class A Shares  purchased  by members of a qualified  group will be
subject to a CDSCof 1% if redeemed within one year of purchase.

Investors  purchasing Class A Shares subject to one of the foregoing waivers are
required to claim and substantiate  their eligibility for the waiver at the time
of purchase.  It is also the  responsibility  of shareholders  redeeming  shares
otherwise  subject to a CDSC but qualifying for a waiver of the charge to assert
this status at the time of redemption. Information regarding these procedures is
available by contacting the Fund at (800) 992-3863.


CERTAIN WAIVERS OF THE CONTINGENT DEFERRED SALES CHARGE

Any CDSC which  otherwise would be imposed on redemptions of Class A Shares will
be waived in certain instances,  including (a) redemptions of shares held at the
time  a  shareholder  becomes  disabled  or  dies,  including  the  shares  of a
shareholder  who owns the shares  with his or her spouse as joint  tenants  with
right of survivorship, provided that the redemption is requested within one year
after the death or initial  determination  of  disability;  (b)  redemptions  in
connection  with the following  retirement plan  distributions:  (i) lump-sum or
other  distributions  from  a  qualified  corporate  or  Keogh  retirement  plan
following retirement, termination of employment, death or disability ( or in the
case of a five percent  owner of the employer  maintaining  the plan,  following
attainment  of age 70  1/2);  (ii)  required  distributions  from an  Individual
Retirement  Account  ("IRA")  following  the  attainment of age 70 1/2 or from a
custodial  account under Section 403(b)(7) of the Internal Revenue Code of 1986,
following  the later of  retirement  or  attainment  of age 70 1/2;  and (iii) a
tax-free  return  of an  excess  contribution  to an  IRA,  and  (c)  systematic
withdrawal payments. For purposes of the waiver described in (a) above, a person
will be deemed  "disabled" if the person is unable to engage in any  substantial
gainful  activity  by reason of any  medically  determinable  physical or mental
impairment  that can be expected  to result in death or to be of  long-continued
and indefinite duration.

Shareholders  claiming  a  waiver  must  assert  their  status  at the  time  of
redemption.


                                      -12-
<PAGE>


MANAGEMENT

TRUSTEES AND OFFICERS OF THE FUND


The Fund is governed by a Board of Trustees which is responsible  for protecting
the interests of shareholders under Massachusetts law. The names of the Trustees
and officers of the Fund,  together with information  concerning their principal
business occupations,  and compensation during the fiscal year ended October 31,
1999 are set forth below. Each of the officers of the Fund is also an officer of
Castle Convertible Fund, Inc., a registered  closed-end  investment company, and
of The Alger  Fund,  The Alger  American  Fund and The  Alger  Retirement  Fund,
registered  open-end  management  investment  companies,  for all of which Alger
Management  serves as  investment  adviser.  Each of the Trustees of the Fund is
also a director  or  trustee,  as the case may be, of certain of these  funds as
indicated in the Trustees' biographies. Fred M. Alger III and David D. Alger are
"interested  persons" of the Fund,  as defined in the Act. Fred M. Alger III and
David D. Alger are brothers.  Unless otherwise noted, the address of each person
named below is One World Trade Center, Suite 9333, New York, New York 10048.



NAME, AGE, POSITION WITH
THE FUND AND ADDRESS              PRINCIPAL OCCUPATIONS


Fred M. Alger III (65)            Chairman of the Boards of Alger Associates,
  Chairman of the Board           Inc. ("Associates"), Alger Inc., Alger
                                  Management, Alger Properties, Inc.
                                  ("Properties"), Alger Shareholder Services,
                                  Inc. ("Services"), Alger Life Insurance
                                  Agency, Inc. ("Agency"), The Alger American
                                  Fund ("American"), The Alger Retirement Fund
                                  ("Retirement"), Castle Convertible Fund, Inc.
                                  ("Castle"), The Alger Fund ("Alger"), The
                                  Alger American Asset Growth Fund ("Asset
                                  Growth"), Fred Alger International Advisory
                                  S.A. ("International"), and Analysts
                                  Resources, Inc. ("ARI").

David D. Alger (56)               President and Director of Associates, Alger
  President and Trustee           Management, Alger Inc., Properties, Services,
                                  International, ARI, Agency and Castle;
                                  President and Trustee of American, Retirement
                                  and Alger; Director of Asset Growth.



Gregory S. Duch (48)              Executive Vice President, Treasurer and
  Treasurer                       Director of Alger Management, Associates and
                                  Properties; Executive Vice President and
                                  Treasurer of Alger Inc., ARI, Services and
                                  Agency; Treasurer and Director of
                                  International.

Mary E. Marsden-Cochran (47)      General Counsel, Vice President and Secretary
  Secretary                       of Associates, Alger Management, Alger Inc.,
                                  Properties, ARI, Services, and Agency
                                  (2/96-present); Secretary of International
                                  (7/97-present); formerly Associate General
                                  Counsel and Vice President, Smith Barney Inc.

Frederick A. Blum (46)            Senior Vice President of Alger Inc.
  Assistant Secretary
  and Assistant Treasurer


Charles F. Baird, Jr. (46)        Managing Partner, North Castle Trustee
  60 Arch Street                  Partners, a private equity securities group,
  Greenwich, CT 06830             since 1997; Trustee of American, Retirement
                                  and Alger; formerly Managing Director, AEA
                                  Investors Inc.

Roger P. Cheever (54)             Associate Dean for Development, Harvard
  Trustee                         University since 1997; Trustee of American,
  124 Mount Auburn Street         Retirement and Alger; formerly Deputy Director
  Cambridge, MA 02138             of the Harvard University Fund.


                                      -13-
<PAGE>


NAME, AGE, POSITION WITH
   THE FUND AND ADDRESS           PRINCIPAL OCCUPATIONS


Lester L. Colbert, Jr. (65)       Private investor since 1988; Director of
   Trustee                        Castle; Trustee of American, Retirement and
   551 Fifth Avenue               Alger; formerly Chairman of the Board,
   New York, NY 10176             President and Chief Executive Officer of Xidex
                                  Corporation.


Stephen E. O'Neil (67)            Attorney; private investor since 1981;
   Trustee                        Director of NovaCare, Inc. and Brown-Forman
   460 Park Avenue                Corporation and Castle; Trustee of American,
   New York, NY 10022             Retirement and Alger; formerly President and
                                  Vice Chairman of City Investing Company and
                                  Director of Centerre Bancorporation and Syntro
                                  Corporation.

Nathan E. Saint-Amand, M.D. (62)  Medical doctor in private practice; Director
   Trustee                        of Castle; Trustee of American, Retirement and
   2 East 88th Street             Alger.
   New York, NY 10128

B. Joseph White (54)              Dean, University of Michigan Business School;
   Trustee                        President, William Davidson Institute at the
   University of Michigan         University of Michigan BusinessSchool;
   Business School                Professor of Business Administration,
   701 Tappan Street              University of Michigan Business School;
   Ann Arbor, MI 48109            Director, Gordon Food Service and Castle;
                                  Trustee and Chair, Audit Committee,Equity
                                  Residential Properties Trust; Director and
                                  Chair, Compensation Committee, Kelly Services,
                                  Inc.; Trustee of American, Retirement.


No director,  officer or employee of Alger Management or its affiliates receives
any compensation from the Fund for serving as an officer or Trustee of the Fund.
The fund pays each independent  trustee $2,000 for each meeting he attends, to a
maximum of $8,000, plus travel expenses incurred for attending the meeting.

The Fund did not offer its Trustees any pension or retirement benefits during or
prior to the fiscal year ended October 31, 1999.  The following  table  provides
compensation  amounts paid to disinterested  Trustees of the Fund for the fiscal
year ended October 31, 1999.

                               COMPENSATION TABLE


                                                    TOTAL COMPENSATION PAID
                                                        TO TRUSTEES FROM
                                                   THE ALGER RETIREMENT FUND,
                                 AGGREGATE               THE ALGER FUND,
                               COMPENSATION         THE ALGER AMERICAN FUND,
                                   FROM        CASTLE CONVERTIBLE FUND, INC. AND
NAME OF PERSON, POSITION       SPECTRA FUND               SPECTRA FUND
- ------------------------       ------------    ---------------------------------


STEPHEN E. O'NEIL, TRUSTEE        $6,250                     $34,250
NATHAN E. SAINT-AMAND, TRUSTEE    $6,250                     $34,250
B. JOSEPH WHITE, TRUSTEE          $6,000                     $27,000


                                      -14-
<PAGE>


INVESTMENT MANAGER

Alger Management serves as investment  manager to the Fund pursuant to a written
agreement (the "Management Agreement"),  subject to the supervision of the Board
of Trustees.  The services  provided by Alger  Management  under the  Management
Agreement  include:   providing  administrative   services,   making  investment
decisions for the Fund, placing orders to purchase and sell securities on behalf
of the Fund, and selecting broker-dealers that, in its judgment,  provide prompt
and reliable  execution at favorable prices and reasonable  commission rates. It
is  anticipated  that Alger Inc.  will serve as the Fund's  broker in  effecting
substantially  all of the Fund's  transactions on securities  exchanges and will
retain commissions in accordance with certain  regulations of the Securities and
Exchange Commission.  Alger Management employs professional  securities analysts
who provide  research  services  exclusively  to the Fund and other accounts for
which  Alger  Management  or its  affiliates  serve  as  investment  adviser  or
subadviser.

Alger  Management  is  owned  by  Alger  Inc.  which  in turn is  owned by Alger
Associates,  Inc. ("Associates"),  a financial services holding company. Fred M.
Alger III and his  brother,  David D. Alger,  are the majority  shareholders  of
Associates and maybe deemed to control that company and its  subsidiaries.  Fred
Alger holds his shares through a limited liability  company,  of which he is the
president and majority shareholder.

Alger  Management  pays the salaries of all officers who are employed by both it
and the Fund. Alger Management has agreed to maintain office  facilities for the
Fund, furnish the Fund with statistical and research data, clerical,  accounting
and bookkeeping  services,  and certain other services required by the Fund, and
to compute the net asset value,  net income and realized capital gains or losses
of the Fund.  Alger  Management  prepares  semi-annual  reports  for the SEC and
shareholders,  prepares  federal and state tax  returns  and filings  with state
securities commissions,  maintains the Fund's financial accounts and records and
generally  assists in all  aspects of the Fund's  operations.  Alger  Management
bears all expenses in connection  with the performance of its services under the
Management Agreement.

For the fiscal years ended October 31, 1999,  October 31, 1998,  and October 31,
1997,   Alger   Management   received   $5,716,197,   $2,172,536  and  $573,068,
respectively, from the Fund under these arrangements.

SHAREHOLDER SERVICING AGREEMENT

Under a Shareholder Servicing Agreement,  the Fund pays Alger Inc. a shareholder
servicing  fee of .25% of the value of the Fund's  average  daily net assets for
service and maintenance of shareholder accounts. Alger Inc. may pay some of this
fee  to  other  organizations  that  also  provide   shareholder   services  and
maintenance of shareholder  accounts.  Payments under the Shareholder  Servicing
Agreement  are  not  tied  exclusively  to the  shareholder  servicing  expenses
actually  incurred by Alger Inc. and the payments may exceed  expenses  actually
incurred   by  Alger  Inc.   The  Fund's   Board  of  Trustees   evaluates   the
appropriateness of the Shareholder  Servicing Agreement and its payment terms on
a periodic  basis and in doing so  considers  all  relevant  factors,  including
expenses borne by Alger Inc. and the amounts it receives  under the  Shareholder
Servicing  Agreement.  During the fiscal year ended  October 31, 1999,  the Fund
paid Alger Inc. $952,698 under the Shareholder Servicing Agreement.

CODE OF ETHICS


Alger  Management  personnel  ("Access  Persons")  are  permitted  to  engage in
personal securities transactions,  including transactions in securities that may
be purchased or held by the Fund,  subject to the restrictions and procedures of
the  Fund's  Code of Ethics.  Pursuant  to the Code of  Ethics,  Access  Persons
generally must preclear all personal  securities  transactions  prior to trading
and are subject to certain  prohibitions on personal trading. You can get a copy
of the Fund's Code of Ethics by calling the Fund toll-free at (800) 711-6141.


EXPENSES OF THE FUND

Operating  expenses for the Fund generally consist of all costs not specifically
borne by Alger Management,  including  custodian fees,  Trustees' fees, transfer
agency fees, legal fees,  auditing costs,  investment  management fees, fees for
necessary  professional and brokerage services,  costs of regulatory  compliance
and costs associated with maintaining legal existence and shareholder relations.
In  addition,  the Fund may  compensate  Alger Inc.  for  servicing  shareholder
accounts. From time to time, Alger Management,  in its sole discretion and as it
deems  appropriate,  may assume certain expenses of the Fund while retaining the
ability to be  reimbursed  by the Fund for such amounts  prior to the end of the
fiscal year.  This will have the effect of lowering the Fund's  overall  expense
ratio and of increasing return to investors,  or the converse,  at the time such
amounts are assumed or reimbursed, as the case may be.

                                      -15-
<PAGE>


INDEPENDENT PUBLIC ACCOUNTANTS

Arthur Andersen LLP serves as independent public accountants for the Fund.

TAXES

The following is a summary of selected  federal income tax  considerations  that
may  affect  the Fund and its  shareholders.  The  summary  is not  intended  to
substitute  for  individual  tax advice and investors are urged to consult their
own tax  advisers  as to the  federal,  state  and  local  tax  consequences  of
investing in the Fund.

The Fund intends to qualify as a "regulated investment company" under Subchapter
M of the Internal Revenue Code of 1986, as amended (the "Code"). If qualified as
a regulated investment company, the Fund will pay no federal income taxes on its
investment  company  taxable  income  (that is,  taxable  income  other than net
realized  long-term capital gains) and its net realized  long-term capital gains
that are distributed to  shareholders.  To qualify under  Subchapter M, the Fund
must,  among other things,  distribute to its  shareholders  at least 90% of its
taxable net investment income and net realized  short-term  capital gains. In so
qualifying  the Fund may be  restricted  in the  utilization  of  certain of the
investment  techniques  described  above  and in  the  Fund's  prospectus.  As a
regulated investment company, the Fund is subject to a non-deductible excise tax
of 4% with respect to certain  undistributed amounts of income and capital gains
during the calendar year. The Fund expects to make additional  distributions  or
change the timing of its  distributions  so as to avoid the  application of this
tax.

In general,  any gain or loss on the  redemption or exchange of Fund shares will
be long-term  capital gain or loss if held by the  shareholder for more than one
year, and will be short-term  capital gain or loss if held for one year or less.
However, if a shareholder  receives a distribution  taxable as long-term capital
gain with respect to Fund shares,  and redeems or  exchanges  the shares  before
holding them for more than six months, any loss on the redemption or exchange up
to the amount of the distribution will be treated as a long-term capital loss.

Dividends  of  the  Fund's  net  investment  income  and  distributions  of  its
short-term  capital gains will be taxable as ordinary  income.  Distributions of
long-term  capital  gains  will be  taxable  as such  at the  appropriate  rate,
regardless  of the  length  of time you  have  held  shares  of the  Fund.  Only
dividends that reflect a Fund's income from certain  dividend-paying stocks will
be  eligible  for  the  federal   dividends-received   deduction  for  corporate
shareholders.

If a  shareholder  fails to furnish a correct  taxpayer  identification  number,
fails to fully report dividend or interest  income,  or fails to certify that he
or she has provided a correct taxpayer  identification number and that he or she
is not subject to such withholding,  then the shareholder may be subject to a 31
percent "backup  withholding tax" with respect to (i) any taxable  dividends and
distributions and (ii) any proceeds of any redemption of Fund shares.

CUSTODIAN AND TRANSFER AGENT

State Street Bank & Trust Company,  225 Franklin Street,  Boston,  Massachusetts
02110,  serves  as  custodian  of the  Fund's  assets  pursuant  to a  custodian
agreement. Alger Shareholder Services, Inc. ("Services"),  30 Montgomery Street,
Jersey City, New Jersey 07302, serves as transfer agent for the Fund pursuant to
a transfer  agency  agreement.  Under the  transfer  agency  agreement  Services
processes  purchases  and  redemptions  of  shares of the  Fund,  maintains  the
shareholder account records for the Fund, handles certain communications between
shareholders  and the Fund  and  distributes  any  dividends  and  distributions
payable by the Fund.

Under the transfer  agency  agreement,  Services is compensated on a per-account
and, for certain transactions, a per-transaction basis.

Diversification

The  Fund  is  classified  as  a  "diversified"  investment  company  under  the
Investment Company Act of 1940. A "diversified"  investment company is required,
with  respect to 75% of its assets,  to limit its  investment  in any one issuer
(other than the U.S.  government) to no more than 5% of the investment company's
total assets. The Fund intends to continue to qualify as a "regulated investment
company"  under the Internal  Revenue  Code;  one of the  requirements  for such
qualification  is a quarterly  diversification  test,  applicable to 50% (rather
than 75%) of the Fund's assets, similar to the requirement stated above.

CERTAIN SHAREHOLDERS


Set forth below is certain  information  regarding  significant  shareholders of
Class N shares.  During the  periods  shown,  shares of the Fund now  designated
Class  N  shares  were  the  only  shares  outstanding.  Charles  Schwab  & Co.,
Inc.--Special  Custody Acct. owned beneficially or of record ____% of the shares
of the Fund at ________,  2000, and may be deemed to control the Fund, which may
have  the  effect  of  proportionately  diminishing  the  voting  power of other
shareholders of the Fund.


                                      -16-
<PAGE>



The following table contains information  regarding persons who are known by the
Fund to own  beneficially  or of record five  percent or more of Class N shares.
Unless  otherwise  noted,  the address of each owner is One World Trade  Center,
Suite 9333, New York, New York 10048. All holdings are expressed as a percentage
of the Fund's outstanding shares as of ___________, 2000.

                                                              RECORD/BENEFICIAL
                                                                  OWNERSHIP
                                                              -----------------
Charles Schwab & Co., Inc.
Special Custody Acct.
101 Montgomery St.
San Francisco, CA 94104 ....................................           ____%/--%

                                                              RECORD/BENEFICIAL
                                                                  OWNERSHIP
                                                              -----------------
National Financial Services
200 Liberty Street
New York, NY 10281 .........................................           ____%/--%


The Fund's  Trustees  and  officers as a group hold  directly  ________%  of the
Fund's  outstanding  shares.  However,  Alger  Associates,  Inc.,  of which Fred
M.Alger III and David D. Alger are the majority  shareholders,  owns 2.2% of the
Fund's shares.


ORGANIZATION

The Fund is a diversified,  open-end  management  investment  company.  From its
inception  in 1968  until  February  12,  1996,  the  Fund  was  organized  as a
Massachusetts  business  corporation,  and  it  had  operated  as  a  registered
closed-end  investment  company  since  1978.  Shares of  closed-end  investment
companies, unlike those of open-end companies, are ordinarily not redeemable and
are not continuously  offered for sale to the public.  On February 12, 1996, the
Fund  reorganized  as a  Massachusetts  business  trust and also converted to an
open-end   investment   company,  or  "mutual  fund."  In  connection  with  the
reorganization,  the name of the Fund was changed from "Spectra  Fund,  Inc." to
"Spectra Fund." The Fund is authorized to offer an unlimited number of shares.

Although, as a Massachusetts  business trust, the Fund is not required by law to
hold annual  shareholder  meetings,  it may hold  meetings  from time to time on
important matters, and shareholders have the right to call a meeting to remove a
Trustee or to take other action  described in the Trust's  Declaration of Trust.
Meetings of  shareholders  normally will not be held for the purpose of electing
Trustees  unless  and until such time as less than a  majority  of the  Trustees
holding  office have been  elected by  shareholders,  at which time the Trustees
then in office will call a  shareholders'  meeting for the election of Trustees.
Under  the  Act,  shareholders  of  record  of no less  than  two-thirds  of the
outstanding  shares of the Fund may remove a Trustee  through a  declaration  in
writing  or by vote  cast in person  or by proxy at a  meeting  called  for that
purpose. Under the Trust Agreement,  the Trustees are required to call a meeting
of shareholders for the purpose of voting on the question of removal of any such
Trustee when requested in writing to do so by the  shareholders of record of not
less than 10 percent of the Fund's outstanding shares.

Shares do not have  cumulative  voting rights,  which means that holders of more
than 50 percent of the shares  voting for the election of Trustees can elect all
Trustees.  Shares have equal voting rights,  which cannot be adversely  modified
other than by majority  vote.  Shares are  transferable  but have no preemptive,
conversion or subscription  rights.  In the interest of economy and convenience,
certificates  representing  shares of the Fund are  physically  issued only upon
specific written request of a shareholder.

Massachusetts law provides that shareholders could, under certain circumstances,
be held personally  liable for the obligations of the Fund.  However,  the Trust
Agreement  disclaims  shareholder  liability for acts or obligations of the Fund
and  requires  that  notice  of such  disclaimer  be  given  in each  agreement,
obligation or instrument entered into or executed by the Fund or a Trustee.  The
Trust Agreement  provides for  indemnification  from the Fund's property for all
losses  and  expenses  of  any  shareholder  held  personally   liable  for  the
obligations of the Fund. Thus, the risk of a shareholder's  incurring  financial
loss on account of shareholder  liability is limited to  circumstances  in which
the Fund itself would be unable to meet its obligations,  a possibility that the
Fund believes is remote. Upon payment of any liability incurred by the Fund, the
shareholder  paying the  liability  will be entitled to  reimbursement  from the
general assets of the Fund. The Trustees intend to conduct the operations of the
Fund in a manner so as to avoid, as far as possible,  ultimate  liability of the
shareholders for liabilities of the Fund.

DETERMINATION OF PERFORMANCE

The Fund may include  quotations of "total return" in  advertisements or reports
to  shareholders  or  prospective  investors.  Total  return  figures  show  the
aggregate or average  percentage  change in value of an  investment  in the Fund
from the  beginning  date of the  measuring  period to the end of the  measuring
period.  These  figures  reflect  changes in the price of the Fund's  shares and
assume that any income dividends and/or capital gains  distributions made by the
Fund during the period were reinvested in shares of the Fund. Figures will

                                      -17-
<PAGE>


be given for recent short-, mid-, and long-term periods (ordinarily for 1, 5 and
10 years),  including  periods  during  which the Fund  operated as a closed-end
investment  company,  and may be given for other  periods  as well (such as from
commencement  of the  Fund's  operations,  or on a  year-by-year  basis) and may
utilize dollar cost  averaging.  The Fund may also use  "aggregate"total  return
figures for various periods,  representing the cumulative  change in value of an
investment  in the Fund for the specific  period  (again  reflecting  changes in
share net asset value and assuming  reinvestment of dividends and distributions)
as well as "actual annual" and "annualized" total return figures.  Total returns
may be shown by means of schedules, charts or graphs, and may indicate subtotals
of the various  components  of total  return  (i.e.,  change in value of initial
investment, income dividends and capital gains distributions). Total return will
vary based on changes in market conditions.  In addition, since the deduction of
expenses is reflected in the total return  figures,  total return will also vary
based on the level of the Fund's expenses.  Current total return  quotations may
be  obtained  by  contacting  the Fund.  Further  information  about the  Fund's
performance  is contained  in its Annual  Report to  Shareholders,  which may be
obtained without charge by contacting the Fund.

The average annual "total return" is computed  according to formulas  prescribed
by the SEC. These performance figures are calculated in the following manner:

A.   Total  Return--The  Fund's  average  annual total  return  described in the
     Prospectus is computed according to the following formula:

                                         n
                                  P (1+T) =ERV

Where:   P = a hypothetical initial payment of $1,000

         T = average annual total return

         n = number of years


       ERV = ending redeemable value of a hypothetical  $1,000  payment  made at
             the  beginning  of  the  1, 5, or 10 year periods at the end of the
             1, 5 and 10 year periods (or fractional portion thereof);


The average  annual total  returns for Class N shares for the periods  indicated
below were as follows:

                               FIVE YEARS      TEN YEARS
                 YEAR ENDED       ENDED          ENDED
                   4/30/00       4/30/00        4/30/00
                   ------         ----           ----

Class N             ____%          ____%          ____%


B. Yield--the Fund's yield is computed according to the following formula:

                                             6
                       YIELD = 2[(a-b/cd + 1) - 1]

Where: a = dividends and interest earned during the period.

       b = expenses accrued for the period (net of reimbursements).

       c = The average  daily  number of shares  outstanding  during the period
           that were entitled to receive dividends.

         d=  the maximum offering price per share on the last day of the period.


The yield for the Fund's  Class N shares for the 30 day period  ended  April 30,
2000, was ____%.

During the periods shown,  shares of the Fund now designated Class N shares were
the only shares outstanding.


IN GENERAL

Current performance information for the Fund may be obtained by calling the Fund
at the  telephone  number  provided  on the  cover  page  of this  Statement  of
Additional  Information.  The Fund's quoted performance may not be indicative of
future performance.  The Fund's performance will depend upon factors such as the
Fund's expenses and the types of instruments held by the Fund.

From time to time,  advertisements  or reports to  shareholders  may compare the
yield or  performance  of the Fund to that of other  mutual funds with a similar
investment  objective.  The  performance  of the  Fund,  for  example,  might be
compared to rankings  prepared by Lipper  Analytical  Services Inc.,  which is a
widely recognized,  independent  service that monitors the performance of mutual
funds, as well as to various unmanaged indices, such as the S&P 500 Index(R). In
addition,  evaluations  of the Fund published by nationally  recognized  ranking
services   or  articles   regarding   performance,   rankings   and  other  Fund
characteristics may appear in national publications  including,  but not limited
to, BARRON'S, BUSINESS WEEK, FORBES, INSTITUTIONAL INVESTOR, INVESTOR'S BUSINESS
DAILY, KIPLINGER'S PERSONAL FINANCE, MONEY, MORNINGSTAR, THE NEW YORK TIMES, USA
TODAY AND THE WALL  STREET  JOURNAL and may be  included  in  advertisements  or
communications to shareholders.  Any given performance  comparison should not be
considered as representative of the Fund's performance for any future period.

FINANCIAL STATEMENTS


The Fund's financial statements for the year ended October 31, 1999, and the six
months ended April 30, 2000, are contained in the Annual and Semi-Annual Reports
to shareholders and are hereby  incorporated by reference.  Copies of the Fund's
Annual and  Semi-Annual  Reports may be obtained  free of charge by  telephoning
(800) 711-6141.


                                      -18-
<PAGE>


APPENDIX

CORPORATE BOND RATINGS

    Bonds rated Aa by Moody's Investors Service,  Inc. ("Moody's") are judged by
Moody's to be of high quality by all  standards.  Together  with bonds rated Aaa
(Moody's  highest  rating) they comprise what are generally  known as high-grade
bonds. Aa bonds are rated lower than Aaa bonds because margins of protection may
not be as large as those of Aaa bonds, or fluctuation of protective elements may
be of greater  amplitude,  or there may be other elements  present that make the
long-term risks appear somewhat larger than those  applicable to Aaa securities.
Bonds that are rated A by Moody's possess many favorable  investment  attributes
and are to be  considered  as upper  medium-grade  obligations.  Factors  giving
security to principal and interest are considered adequate,  but elements may be
present that suggest a susceptibility to impairment in the future.

    Moody's Baa rated bonds are considered as  medium-grade  obligations,  i.e.,
they are neither  highly  protected nor poorly  secured.  Interest  payments and
principal  security  appear  adequate  for the present,  but certain  protective
elements may be lacking or may be  characteristically  unreliable over any great
length of time. Such bonds lack outstanding  investment  characteristics and, in
fact, have speculative characteristics as well.

    Bonds rated Ba by Moody's  are judged to have  speculative  elements;  their
future cannot be considered  as well assured.  Often the  protection of interest
and  principal  payments may be very  moderate and thereby not well  safeguarded
during  both  good  and bad  times  over the  future.  Uncertainty  of  position
characterizes  bonds in this class. Bonds which are rated B by Moody's generally
lack  characteristics  of a desirable  investment.  Assurance  of  interest  and
principal  payments or of  maintenance  of other terms of the contract  over any
long period of time may be small.

    Moody's  applies the numerical  modifiers 1, 2 and 3 to each generic  rating
classification  from Aa through B. The  modifier 1 indicates  that the  security
ranks in the higher end of its generic rating category; the modifier 2 indicates
a mid-range  ranking;  and the modifier 3 indicates  that the issue ranks in the
lower end of its generic rating category.

    Bonds rated AA by Standard & Poor's Corporation ("S&P") are judged by S&P to
be high-grade  obligations and in the majority of instances differ only in small
degree  from  issues  rated AAA  (S&P's  highest  rating).  Bonds  rated AAA are
considered by S&P to be the highest grade  obligations  and possess the ultimate
degree of protection as to principal  and interest.  With AA bonds,  as with AAA
bonds, prices move with the long-term money market.  Bonds rated A by S&P have a
strong  capacity to pay principal and interest,  although they are somewhat more
susceptible  to the adverse  effects of changes in  circumstances  and  economic
conditions.

    S&P's BBB rated  bonds,  or  medium-grade  category  bonds,  are  borderline
between  definitely sound  obligations and those where the speculative  elements
begin to predominate.  These bonds have adequate asset coverage and normally are
protected by satisfactory earnings. Their susceptibility to changing conditions,
particularly  to  depressions,   necessitates  constant  watching.  These  bonds
generally are more responsive to business and trade  conditions than to interest
rates. This group is the lowest that qualifies for commercial bank investment.

    Bonds  rated BB and B by S&P are  regarded,  on  balance,  as  predominantly
speculative  with  respect to capacity to pay  interest  and repay  principal in
accordance  with the terms of the  obligation.  These ratings may be modified by
the addition of a plus or minus sign to show relative  standing within the major
rating  categories.  Debt rated BB has less near-term  vulnerability  to default
than other speculative issues.  However, it faces major ongoing uncertainties or
exposure to adverse business,  financial or economic  conditions that could lead
to inadequate  capacity to meet timely interest and principal  payments.  The BB
rating  category  is also  used for debt  subordinated  to  senior  debt that is
assigned  an  actual  or  implied  BBB-  rating.  Debt  rated  B has  a  greater
vulnerability  to  default  but  currently  has the  capacity  to meet  interest
payments  and  principal  repayments.  Adverse  business,  financial or economic
conditions  will likely impair capacity or willingness to pay interest and repay
principal.  The B rating  category is also used for debt  subordinated to senior
debt that is assigned an actual or implied BB or BB- rating.

    Bonds rated AAA by Fitch  Investors  Service,  Inc.  ("Fitch") are judged by
Fitch to be strictly high grade, broadly marketable,  suitable for investment by
trustees and fiduciary  institutions and liable to but slight market fluctuation
other than through changes in the money rate. The prime feature of an AA bond is
a showing of earnings  several times or many times interest  requirements,  with
such stability of applicable earnings that safety is beyond reasonable question

                                      A-1
<PAGE>


APPENDIX
(continued)


whatever  changes  occur in  conditions.  Bonds  rated AA by Fitch are judged by
Fitch to be of safety virtually  beyond question and are readily salable,  whose
merits are not unlike those of the AAA class, but whose margin of safety is less
strikingly  broad. The issue may be the obligation of a small company,  strongly
secured  but  influenced  as to  rating  by the  lesser  financial  power of the
enterprise and more local type of market.

    Bonds rated Duff-1 are judged by Duff and Phelps, Inc. ("Duff") to be of the
highest credit quality with negligible risk factors;  only slightly more than U.
S. Treasury debt.  Bonds rated Duff-2,  3 and 4 are judged by Duff to be of high
credit  quality  with  strong  protection  factors.  Risk is modest but may vary
slightly from time to time because of economic conditions.

COMMERCIAL PAPER RATINGS

    Moody's  Commercial  Paper ratings are opinions of the ability of issuers to
repay  punctually  promissory  obligations  not having an  original  maturity in
excess of nine months. The rating Prime-1 is the highest commercial paper rating
assigned by Moody's.  Issuers rated Prime-1, or related supporting institutions,
are  considered  to  have  a  superior  capacity  for  repayment  of  short-term
promissory   obligations.   Issuers  rated   Prime-2,   or  related   supporting
institutions,  are  considered  to  have a  strong  capacity  for  repayment  of
short-term  promissory  obligations.  This will normally be evidenced by many of
the characteristics of issuers rated Prime-l,  but to a lesser degree.  Earnings
trends and  coverage  ratios,  while sound,  will be more subject to  variation.
Capitalization characteristics, while still appropriate, may be more affected by
external conditions. Ample liquidity is maintained.

    Commercial paper ratings of S&P are current assessments of the likelihood of
timely  payment of debts having  original  maturities  of no more than 365 days.
Commercial  paper rated A-1 by S&P indicates that the degree of safety regarding
timely payment is either overwhelming or very strong. Those issues determined to
possess  overwhelming  safety  characteristics  are denoted  A-1+.  Capacity for
timely payment on commercial paper rated A-2 is strong,  but the relative degree
of  safety is not as high as for  issues  designated  A-1.  The  rating  Fitch-1
(Highest Grade) is the highest  commercial paper rating assigned by Fitch. Paper
rated Fitch-1 is regarded as having the strongest degree of assurance for timely
payment.  The rating Fitch-2 (Very Good Grade) is the second highest  commercial
paper rating  assigned by Fitch which  reflects an  assurance of timely  payment
only slightly less in degree than the strongest issues.

    The rating Duff-1 is the highest  commercial  paper rating assigned by Duff.
Paper rated Duff-1 is regarded as having very high  certainty of timely  payment
with excellent  liquidity factors which are supported by ample asset protection.
Risk factors are minor.  Paper rated Duff-2 is regarded as having good certainty
of timely payment,  good access to capital  markets and sound liquidity  factors
and company fundamentals. Risk factors are small.

                                      A-2
<PAGE>


INVESTMENT MANAGER:
Fred Alger Management, Inc.
One World Trade Center
Suite 9333
New York, New York 10048

- ----------------------------------
DISTRIBUTOR:
Fred Alger & Company, Incorporated
30 Montgomery Street
Jersey City, New Jersey 07302

- ----------------------------------
TRANSFER AGENT:
Alger Shareholder Services, Inc.
30 Montgomery Street
Box 2001
Jersey City, New Jersey 07302

- ----------------------------------
INDEPENDENT PUBLIC ACCOUNTANTS:
Arthur Andersen LLP
1345 Avenue of the Americas
New York, New York 10105

- ----------------------------------
COUNSEL:
Hollyer Brady Smith Troxell
 Barrett Rockett Hines & Mone LLP
551 Fifth Avenue
New York, New York 10176

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

No person has been authorized to
give any information or to make any
representations other than those
contained in the Prospectus, the
Statement of Additional Information
or the Fund's official sales
literature in connection with the
offering of the Fund's shares, and
if given or made, such other
information or representations must
not be relied on as having been
authorized by the Fund. The
Prospectus does not constitute an
offer in any state in which, or to
any person to whom, such offer may
not lawfully be made.


                      |
                      | ONE WORLD TRADE CENTER
              SPECTRA | SUITE 9333
                 FUND | NEW YORK, NEW YORK 10048
                      | (800) 711-6141
                      |


                      |
            STATEMENT |
        OF ADDITIONAL | JULY __, 2000
          INFORMATION |
                      |
                      |


<PAGE>

                                     PART C

                                OTHER INFORMATION

Item 23.   Exhibits

Exhibit No.                Description of Exhibit
- -----------                ----------------------

     (a)            Agreement and Declaration of Trust (1)  [EDGAR 2/98]

     (b)            By-laws of Registrant (1) [EDGAR 2/98]

     (c)            See Exhibits (a) and (b)

     (d)            Investment Management Agreement (1)  [EDGAR 2/98]

     (e)            Distribution Agreement (1)  [EDGAR 2/98]



<PAGE>

     (g)            Custody Agreement (4)

     (h)            Shareholder Servicing Agreement (1)  [EDGAR 2/98]

     (i)            Opinion and Consent of Hollyer Brady Smith Troxell
                    Barrett Rockett Hines & Mone LLP (3)

     (j-1)          Opinion and Consent of Sullivan & Worcester (5)

     (j-2)          Consent of Arthur Andersen LLP

     (p)            Powers of Attorney executed by David D. Alger, Gregory S.
                    Duch, Stephen E. O'Neil, Nathan E. Saint-Amand and B. Joseph
                    White (6)

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

(1)  Incorporated  by  reference to  Registrant's  Registration  Statement  (the
     "Registration Statement") filed with the Securities and Exchange Commission
     (the "SEC") on October 6, 1995.

(2)  Incorporated  by  reference  to  Pre-Effective   Amendment  No.  1  to  the
     Registration Statement, filed with the SEC on December 4, 1995.

(3)  Incorporated  by  reference  to  Pre-Effective   Amendment  No.  2  to  the
     Registration Statement, filed with the SEC on February 6, 1996.

(4)  Incorporated by reference to  Post-Effective Amendment No. 3 filed with the
     SEC on February 28, 1997.

(5)  Incorporated by reference to Post-Effective Amendment No. 4 filed with the
     SEC on December 22, 1998.

(6)  Incorporated by reference to Post-Effective Amendment No. 5 filed with the
     SEC on February 26, 1999.

Item 24. Persons Controlled by or Under Common Control with Registrant
         -------------------------------------------------------------

                                     None.

<PAGE>

Item 25.  Indemnification
          ---------------

         Under Section 8.4 of  Registrant's  Agreement and Declaration of Trust,
any past or present  Trustee or officer of  Registrant  (including  persons  who
serve at  Registrant's  request as  directors,  officers  or Trustees of another
organization in which Registrant has any interest as a shareholder,  creditor or
otherwise[hereinafter  referred to as a "Covered Person"]) is indemnified to the
fullest extent  permitted by law against  liability and all expenses  reasonably
incurred by him in  connection  with any action,  suit or proceeding to which he
may be a party or  otherwise  involved  by reason of his being or having  been a
Covered  Person.  This provision does not authorize  indemnification  when it is
determined,  in the manner  specified in the Agreement and Declaration of Trust,
that such Covered  Person has not acted in good faith in the  reasonable  belief
that his actions  were in or not opposed to the best  interests  of  Registrant.
Moreover,  this  provision  does  not  authorize   indemnification  when  it  is
determined , in the manner  specified in the Agreement and Declaration of Trust,
that  such  Covered  Person  would  otherwise  be liable  to  Registrant  or its
shareholders by reason of willful  misfeasance,  bad faith,  gross negligence or
reckless disregard of his duties.  Expenses may be paid by Registrant in advance
of the final  disposition of any action,  suit or proceeding  upon receipt of an
undertaking  by such Covered  Person to repay such expenses to Registrant in the
event that it is ultimately  determined that indemnification of such expenses is
not authorized  under the Agreement and  Declaration of Trust and either (i) the
Covered  Person  provides  security for such  undertaking,  (ii)  Registrant  is
insured against losses from such advances,  or (iii) the disinterested  Trustees
or  independent  legal  counsel  determines,  in  the  manner  specified  in the
Agreement and Declaration of Trust,  that there is reason to believe the Covered
Person will be found to be entitled to indemnification.

         Insofar as  indemnification  for liability arising under the Securities
Act of 1933 (the  "Securities  Act") may be permitted to Trustees,  officers and
controlling  persons of  Registrant  pursuant to the  foregoing  provisions,  or
otherwise, Registrant has been advised that in the opinion of the Securities and
Exchange Commission (the "SEC") such indemnification is against public policy as
expressed in the Securities Act and is, therefore,  unenforceable.  In the event
that a claim  for  indemnification  against  such  liabilities  (other  than the
payment by  Registrant  of expenses  incurred  or paid by a Trustee,  officer or
controlling person of Registrant in the successful  defense of any action,  suit

<PAGE>

or  proceeding)  is asserted by such Trustee,  officer  orcontrolling  person in
connection with the securities being registered,  Registrant will, unless in the
opinion of its counsel  the matter has been  settled by  controlling  precedent,
submit  to a  court  of  appropriate  jurisdiction  the  question  whether  such
indemnification  by it is against  public policy as expressed in the  Securities
Act and will be governed by the final adjudication of such issue.


Item 26.  Business and Other Connections of Investment Adviser
          ----------------------------------------------------

         Alger Management,  which serves as investment manager to Registrant, is
generally engaged in rendering investment advisory services to institutions and,
to a lesser extent, individuals. Alger Management presently serves as investment
adviser  to one  closed-end  investment  company  and to  three  other  open-end
investment  companies.  The list  required by this Item 26  regarding  any other
business, profession,  vocation or employment of a substantial nature engaged in
by  officers  and  directors  of Alger  Management  during the past two years is
incorporated  by  reference  to  Schdules  A and D of Form  ADV  filed  by Alger
Management  pursuant  to the  Investment  Advisers  Act of 1940  (SEC  File  No.
801-06709).


Item 27. Principal Underwriter
         ---------------------

         (a) Alger Inc. acts as principal underwriter for Registrant, The Alger
Fund, The Alger American Fund and The Alger Retirement Fund and has acted as
subscription agent for Castle Convertible Fund, Inc.

         (b) The  information  required  by this  Item 27 with  respect  to each
director,  officer or partner of Alger Inc.  is  incorporated  by  reference  to
Schedule A of Form BD filed by Alger Inc.  pursuant to the  Securities  Exchange
Act of 1934 (SEC File No. 8-6423).

         (c) Not applicable.

Item 28. Location of Accounts and Records
         --------------------------------

         All accounts and records of Registrant are maintained by Mr. Gregory S.
Duch, Fred Alger & Company,  Incorporated, 30 Montgomery Street, Jersey City, NJ
07302.

<PAGE>

Item 29.  Management Services
          -------------------

          Not applicable.


Item 30.          Undertakings
                  ------------

          Not applicable.

<PAGE>

                                   SIGNATURES



          Pursuant to the requirements of the Securities Act of 1933 and the
Investment Company Act of 1940, as amended, Registrant has duly caused this
Amendment to be signed on its behalf by the undersigned, thereto duly
authorized, in the City of New York and State of New York on the 8th day of
May, 2000.



                                          SPECTRA FUND

                                          By:  /s/ David D. Alger
                                               -------------------------------
                                               David D. Alger, President

ATTEST:  /s/  Gregory S. Duch
        --------------------------------------
              Gregory S. Duch, Treasurer

         Pursuant to the requirements of the Securities Act, this Registration
Statement has been signed below by the following persons in the capacities and
on the dates indicated:


<TABLE>
<CAPTION>

         Signature                                    Title                                      Date
         ---------                                    -----                                      ----
<S>                                                   <C>                                    <C>
   /s/ Fred M. Alger III*                                                                    May 8, 2000
- ----------------------------------------------------- Chairman of the Board                ---------------
         Fred M. Alger III


   /s/ David D. Alger                                                                        May 8, 2000
- ----------------------------------------------------- President and Trustee                ---------------
         David D. Alger                               (Chief Executive Officer)

   /s/  Gregory S. Duch                                                                      May 8, 2000
- ----------------------------------------------------- Treasurer                            ---------------
         Gregory S. Duch                              (Chief Financial and Accounting
                                                       Officer)

   /s/ Nathan E. Saint-Amand*                                                                May 8, 2000
- ----------------------------------------------------- Trustee                              ---------------
         Nathan E. Saint-Amand

   /s/ Stephen E. O'Neil*                                                                    May 8, 2000
- ----------------------------------------------------- Trustee                              ---------------
         Stephen E. O'Neil

   /s/ Charles F. Baird, Jr.*                                                                May 8, 2000
- ----------------------------------------------------- Trustee                              ---------------
         Charles F. Baird, Jr.

   /s/ Lester L. Colbert, Jr.*                                                               May 8, 2000
- ----------------------------------------------------- Trustee                              ---------------
         Lester L. Colbert, Jr.

   /s/ B. Joseph White*                                                                      May 8, 2000
- ----------------------------------------------------- Trustee                              ---------------
         B. Joseph White

   /s/ Roger P. Cheever*                                                                     May 8, 2000
- ----------------------------------------------------- Trustee                              ---------------
         Roger P. Cheever

*By: Gregory S. Duch
     --------------------------
     Gregory S. Duch
     Attorney-in-Fact
</TABLE>


<PAGE>

                        Securities Act File No. 33-98102
                    Investment Company Act File No. 811-1743


                       SECURITIES AND EXCHANGE COMMISSION
                              Washington, DC 20549


                                    FORM N-1A


                                                                           ---
           REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933          x
                                                                           ---

                                                                           ---
                         Post-Effective Amendment No. 7                      x
                                                                           ---

                                     and/or


                                                                           ---
       REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940      x
                                                                           ---
                                                                           ---
                                Amendment No. 20                            x
                                                                           ---

                        (Check appropriate box or boxes)


                                  SPECTRA FUND
- --------------------------------------------------------------------------------
               (Exact Name of Registrant as Specified in Charter)


                           --------------------------
                                 E X H I B I T S
                           --------------------------

<PAGE>

                                INDEX TO EXHIBITS


Exhibit
   No.
   ---

<TABLE>
<CAPTION>

<S>         <C>                                                   <C>
   (j-1)    Opinion and Consent of Sullivan and Worcester.........to be filed by amendment
   (j-2)    Consent of Arthur Andersen LLP........................to be filed by amendment
</TABLE>




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