FORTIS SERIES FUND INC
485APOS, 1998-02-13
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<PAGE>

                                              1933 Act Registration No.  33-3920
                                              1940 Act Registration No. 811-4615

AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON FEBRUARY 13, 1998

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

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM N-1A
             REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933
                       Pre-Effective Amendment No.
                                                   -------
                     Post-Effective Amendment No.    22
                                                  ---------

                                     AND/OR

                        REGISTRATION STATEMENT UNDER THE
                         INVESTMENT COMPANY ACT OF 1940
                             Amendment No.    22
                                           --------
                        (Check appropriate box or boxes)

                            FORTIS SERIES FUND, INC.
               (Exact Name of Registrant as Specified in Charter)

                              500 Bielenberg Drive
                           Woodbury, Minnesota  55125
               (Address of Principal Executive Offices, Zip Code)

                                 (612) 738-4000
              (Registrant's Telephone Number, including Area Code)

                             Scott R. Plummer, Esq.
                              500 Bielenberg Drive
                           Woodbury, Minnesota  55125
                     (Name and Address of Agent for Service)

                                    COPY TO:
                             Michael J. Radmer, Esq.
                              Dorsey & Whitney LLP
                             220 South Sixth Street
                       Minneapolis, Minnesota  55402-1498

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

                    immediately upon filing pursuant to paragraph (b) of
                    Rule 485
         ---------
                    on (specify date) pursuant to paragraph (b) of Rule 485
         ---------
                    75 days after filing pursuant to paragraph (a) of Rule 485
         ---------
             X      on May 1, 1998 pursuant to paragraph (a) of Rule 485
         ---------
                    60 days after filing pursuant to paragraph (a) of Rule 485
         ---------

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<PAGE>

                            FORTIS SERIES FUND, INC.
                       Registration Statement on Form N-1A

           -----------------------------------------------------------
                              Cross Reference Sheet
                             Pursuant to Rule 481(a)
           -----------------------------------------------------------

Item No.                                     Prospectus Heading
- --------                                     ------------------
1.   Cover Page. . . . . . . . . . . . . .   Cover Page (no caption)
2.   Synopsis. . . . . . . . . . . . . . .   (not included)
3.   Financial Highlights. . . . . . . . .   Financial Highlights
4.   General Description of Registrant . .   Organization and Classification;
                                             The Separate Accounts and the
                                             Contracts,  Investment Objectives
                                             and Policies; Risk Considerations
5.   Management of the Fund. . . . . . . .   Management
6.   Capital Stock and Other Securities. .   Capital Stock; Dividends and
                                             Capital Gain Distributions;
                                             Taxation
7.   Purchase of Securities Being Offered.   Purchase and Redemption of Shares
8.   Redemption or Repurchase. . . . . . .   Purchase and Redemption of Shares
9.   Pending Legal Proceedings . . . . . .   Not Applicable

Heading                                      Statement of Additional Information
- -------                                      -----------------------------------
10.  Cover Page. . . . . . . . . . . . . .   Cover Page (no caption)
11.  Table of Contents . . . . . . . . . .   Table of Contents
12.  General Information and History . . .   Organization and Classification
13.  Investment Objectives and Policies. .   Investment Objectives and Policies
14.  Management of the Fund. . . . . . . .   Directors and Executive Officers
15.  Control Persons and Principal
     Holders of Securities . . . . . . . .   Capital Stock
16.  Investment Advisory and Other
     Services. . . . . . . . . . . . . . .   Investment Advisory and Other
                                             Services
17.  Brokerage Allocation and Other
     Practices . . . . . . . . . . . . . .   Portfolio Transactions and
                                             Allocation of Brokerage
18.  Capital Stock and Other Securities. .   Capital Stock
19.  Purchase, Redemption and Pricing
     of Securities Being Offered . . . . .   Computation of Net Asset Value and
                                             Pricing; Redemption
20.  Tax Status. . . . . . . . . . . . . .   Taxation
21.  Underwriters. . . . . . . . . . . . .   Underwriter
22.  Calculations of Performance Data. . .   Performance
23.  Financial Statements. . . . . . . . .   Financial Statements

<PAGE>
 
   
<TABLE>
<S>                           <C>                          <C>
                                                           PROSPECTUS DATED
[LOGO]                        FORTIS SERIES FUND, INC.     May 1, 1998
MAILING ADDRESS:              (A fund with eighteen        STREET ADDRESS:
P.O. BOX 64582                separate series,             500 BIELENBERG DRIVE
ST. PAUL                      each with different goals    WOODBURY
MINNESOTA 55164               and investment policies)     MINNESOTA 55125
</TABLE>
    
 
   
Fortis  Series Fund, Inc. ("Fortis Series") is an open-end management investment
company (commonly known as a "mutual fund") that is intended to provide a  range
of  investment alternatives through its eighteen separate series (the "Series"),
each of which is, for  investment purposes, a separate  fund with its own  goals
and  investment policies.  Each Series  is diversified,  except the  Global Bond
Series, which is a nondiversified series.
    
 
   
Shares are  currently sold  to separate  accounts (the  "Separate Accounts")  of
Fortis  Benefits  Insurance Company  ("Fortis Benefits")  and First  Fortis Life
Insurance Company ("First Fortis"), which are the funding vehicles for  benefits
under  variable life  insurance policies  (the "Policies")  and variable annuity
contracts (the  "Annuities") (collectively,  the "Contracts")  issued by  Fortis
Benefits  and First  Fortis. The  Separate Accounts  invest in  shares of Fortis
Series through subaccounts that correspond to the different Series. The Separate
Accounts will redeem shares of Fortis Series to the extent necessary to  provide
benefits  under the Contracts  or for such  other purposes as  may be consistent
with the Contracts.
    
 
   
The investment objectives of each Series  are nonfundamental and may be  changed
at  any time without the approval  of Contract owners. The investment objectives
are:
    
 
- - The objectives  of  the "Money  Market  Series"  are high  levels  of  capital
  stability  and  liquidity and,  to the  extent  consistent with  these primary
  objectives, a high level of current income. Money Market Series will invest in
  a diversified  portfolio of  commercial paper  and other  debt securities.  AN
  INVESTMENT  IN MONEY  MARKET SERIES IS  NEITHER INSURED NOR  GUARANTEED BY THE
  U.S. GOVERNMENT.
 
- - The objective of the "U.S. Government Securities Series" is to maximize  total
  return  (from income  and market  value change),  while providing shareholders
  with a high level  of current income consistent  with prudent investment  risk
  through  investment primarily in  debt securities of  varying maturities which
  have been issued, guaranteed, insured  or collateralized by the United  States
  Government or its agencies or instrumentalities.
 
- - The  objective of the "Diversified Income  Series" is to maximize total return
  (from income and market value change), by investing primarily in a diversified
  portfolio of  government  securities  and investment  grade  corporate  bonds.
  However,  up to 30% of Diversified Income Series' total assets may be invested
  in non-investment grade corporate bonds and other securities.
 
- - The objective of the "Global Bond Series" is total return from current  income
  and capital appreciation. The Series invests in a global portfolio principally
  consisting  of  high  quality  fixed-income  securities  of  governmental  and
  corporate issuers  and  supranational  organizations,  which  securities  have
  varying maturities and are denominated in various currencies.
 
   
- - The  objective of the  "High Yield Series"  is to maximize  total return (from
  income  and  market  value  change)  by  investing  primarily  in  high-yield,
  high-risk   fixed-income  securities,  which  may  not  be  suitable  for  all
  investors.
    
 
   
- - The objective of the "Global Asset Allocation Series" is maximum total  return
  to  be derived primarily from capital appreciation, dividends and interest, by
  following a  flexible asset  allocation strategy.  This strategy  contemplates
  increased  ownership  of global  equity securities  during periods  when stock
  market  conditions  appear  favorable   and  increased  ownership  of   global
  fixed-income  securities during periods when  stock market conditions are less
  favorable.
    
 
   
- - The objective of  the "Asset  Allocation Series"  is maximum  total return  on
  invested capital to be derived primarily from capital appreciation, dividends,
  and   interest,  by  following  a  flexible  asset  allocation  strategy  that
  contemplates increased  ownership of  equity  securities during  periods  when
  stock market conditions appear favorable, and increased ownership of short and
  long  term debt  instruments during periods  when stock  market conditions are
  less favorable.
    
 
- - The primary objective  of the "Value  Series" is short  and long-term  capital
  appreciation. Current income is only a secondary objective. The Series invests
  primarily  in equity  securities and  selects stocks  based on  the concept of
  fundamental value.
 
   
- - The objectives of the  "Growth & Income Series"  are capital appreciation  and
  current  income  which  such Series  seeks  by investing  primarily  in equity
  securities that provide an income component and the potential for growth.
    
 
- - The objective of the "S&P 500 Index  Series" is to replicate the total  return
  of  the Standard  & Poor's 500  Composite Stock Price  Index primarily through
  investments in equity securities.
 
   
- - The primary objective of the "Blue  Chip Stock Series" is long-term growth  of
  capital.  Current income is a  secondary objective, and many  of the stocks in
  this Series' portfolio are expected to pay dividends.
    
 
   
- - The objective of the "International  Stock Series" is capital appreciation  by
  investing primarily in the equity securities of non-United States companies.
    
 
   
- - The  objective  of the  "Mid  Cap Stock  Series"  is total  investment returns
  (including capital appreciation and  income) that consistently outperform  the
  Standard  &  Poor's  400  MidCap  Index. The  Series  attempts  to  maintain a
  diversified holding in common stocks of medium capitalization companies with a
  market value between $200 million and $5 billion.
    
 
   
- - The objective of  the "Small Cap  Value Series" is  capital appreciation.  The
  Series  invests primarily in common stocks of  small companies that are out of
  favor with  markets  or that  have  not yet  been  discovered by  the  broader
  investment community and are therefore believed to be undervalued.
    
 
   
- - The  primary  objective of  the "Global  Growth  Series" is  long-term capital
  appreciation which it seeks  primarily by investing in  a global portfolio  of
  equity  securities,  allocated  among diverse  international  markets. Current
  income through  the receipt  of  income such  as  interest or  dividends  from
  investments is a secondary objective.
    
 
   
- - The objective of the "Large Cap Growth Series" is long-term growth of capital.
  The  Series invests primarily in the equity  securities of a limited number of
  large,  carefully  selected,  high  quality  United  States  companies   whose
  securities are believed likely to achieve superior earnings growth.
    
 
   
- - The  primary objective  of the  "Growth Stock  Series" is  short and long-term
  capital appreciation.  Current  income through  the  receipt of  interest  and
  dividends  will merely be incidental to the  efforts of Growth Stock Series in
  pursuing its primary objective.  Growth Stock Series will  seek to meet  these
  objectives  by investing primarily in common stocks and securities convertible
  into common stocks.
    
 
- - The objective of the "Aggressive  Growth Series" is maximum long-term  capital
  appreciation  by investing primarily in equity  securities of small and medium
  sized companies  that  are early  in  their life  cycles  but which  have  the
  potential  to become major enterprises and  of more established companies that
  have the potential for above-average capital growth.
 
   
This Prospectus  concisely sets  forth the  information a  prospective  investor
should  know about Fortis Series before  investing. Investors should retain this
Prospectus for  future  reference.  Fortis  Series  has  filed  a  Statement  of
Additional  Information  dated  May 1,  1998  with the  Securities  and Exchange
Commission (the  "Commission").  The  Statement  of  Additional  Information  is
available free of charge from Fortis Series at the above mailing address, and is
incorporated   by  reference  into  this   Prospectus  in  accordance  with  the
Commission's rules. The Commission maintains a World Wide Web site that contains
reports and  information regarding  issuers that  file electronically  with  the
Commission.  The address of such site  is "http://www.sec.gov." SHARES IN FORTIS
SERIES ARE NOT  DEPOSITS OR OBLIGATIONS  OF, OR GUARANTEED  OR ENDORSED BY,  ANY
BANK;  ARE NOT FEDERALLY  INSURED BY THE  FEDERAL DEPOSIT INSURANCE CORPORATION,
THE FEDERAL RESERVE BOARD,  OR ANY OTHER AGENCY;  AND INVOLVE INVESTMENT  RISKS,
INCLUDING THE POSSIBLE LOSS OF PRINCIPAL.
    
 
THESE  SECURITIES HAVE  NOT BEEN APPROVED  OR DISAPPROVED BY  THE SECURITIES AND
EXCHANGE COMMISSION OR ANY  STATE SECURITIES COMMISSION  NOR HAS THE  SECURITIES
AND  EXCHANGE  COMMISSION OR  ANY STATE  SECURITIES  COMMISSION PASSED  UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.
 
   
No broker-dealer, sales representative, or  other person has been authorized  to
give  any information or to make  any representations other than those contained
in this Prospectus, and  if given or made,  such information or  representations
must  not be  relied upon  as having been  authorized by  Fortis Benefits, First
Fortis, Fortis Series or Fortis  Investors, Inc. ("Investors"). This  Prospectus
does  not constitute an  offer or solicitation  by anyone in  any state in which
such offer or solicitation is not authorized, or in which the person making such
offer or solicitation is not qualified to do so, or to any person to whom it  is
unlawful to make such offer or solicitation.
    
<PAGE>
TABLE OF CONTENTS
   
<TABLE>
<CAPTION>
                                                              PAGE
<S>                                                           <C>
Financial Highlights........................................    2
Organization and Classification.............................    7
The Separate Accounts and the Contracts.....................    8
Investment Objectives and Policies; Risk Considerations.....    8
    - Money Market Series...................................    8
    - U.S. Government Securities Series.....................    9
    - Diversified Income Series.............................   10
    - Global Bond Series....................................   10
    - High Yield Series.....................................   11
    - Global Asset Allocation Series........................   12
    - Asset Allocation Series...............................   12
    - Value Series..........................................   13
    - Growth & Income Series................................   13
    - S&P 500 Index Series..................................   13
    - Blue Chip Stock Series................................   14
    - International Stock Series............................   15
    - Mid Cap Stock Series..................................   16
    - Small Cap Value Series................................   17
    - Global Growth Series..................................   17
    - Large Cap Growth Series...............................   18
    - Growth Stock Series...................................   19
    - Aggressive Growth Series..............................   19
    - Investment Policies, Restrictions, and Risks
        Applicable to More Than One Series..................   19
    - General Risks to Consider.............................   26
 
<CAPTION>
                                                              PAGE
<S>                                                           <C>
Management..................................................   27
    - Board of Directors....................................   27
    - The Investment Adviser/Transfer Agent/Dividend Agent..   27
    - Portfolio Management..................................   27
    - The Underwriter.......................................   27
    - The Sub-Advisers......................................   28
    - Expenses..............................................   29
    - Brokerage Allocation..................................   29
    - Periodic Reports......................................   29
Capital Stock...............................................   29
    - Voting Privileges.....................................   29
Dividends and Capital Gains Distributions...................   29
Taxation....................................................   30
Purchase and Redemption of Shares...........................   30
    - Generally.............................................   30
    - Offering Price........................................   30
    - Transfers Among Subaccounts...........................   31
    - Redemption............................................   31
Appendix....................................................   31
</TABLE>
    
 
   
FINANCIAL HIGHLIGHTS
(For a share outstanding throughout the period)
    
 
   
The  following audited financial  highlights should be  read in conjunction with
the financial statements of the applicable Series and the independent  auditors'
report  of KPMG Peat Marwick  LLP found in Fortis  Series' 1997 Annual Report to
Shareholders, which  may be  obtained  without charge.  The selected  per  share
historical  data for each of  the Series is presented  based upon average shares
outstanding. Total return figures do not  reflect charges pursuant to the  terms
of the variable life insurance policies and variable annuity contracts funded by
separate  accounts  that  invest  in  the  Series'  shares.  Information  is not
presented for Large Cap Growth Series, Mid Cap Stock Series and Small Cap  Value
Series, because they had not commenced operations during the years presented.
    
 
   
<TABLE>
<CAPTION>
- -----------------------------------------------------------------------------------------------------------------------------------
<S>                        <C>        <C>        <C>        <C>        <C>        <C>        <C>       <C>       <C>       <C>
                                                                   YEAR ENDED DECEMBER 31,
MONEY MARKET SERIES          1997       1996       1995       1994       1993       1992       1991      1990      1989      1988
- -----------------------------------------------------------------------------------------------------------------------------------
Net asset value, beginning
 of period................             $10.83     $10.63     $10.23     $10.21     $10.15     $10.19     $9.92     $9.65     $9.98
- -----------------------------------------------------------------------------------------------------------------------------------
Operations:
  Investment income --
   net....................                .57        .60        .41        .28        .36        .62       .78       .77       .76
  Net realized and
   unrealized gains
   (losses) on
   investments............                 --         --       (.01)       .02        .06       (.02)      .28       .27      (.29)
- -----------------------------------------------------------------------------------------------------------------------------------
Total from operations.....                .57        .60        .40        .30        .42        .60      1.06      1.04       .47
- -----------------------------------------------------------------------------------------------------------------------------------
Distribution to
 shareholders:
  From investment income
   -- net.................               (.46)      (.40)        --       (.28)      (.36)      (.64)     (.79)     (.77)     (.80)
- -----------------------------------------------------------------------------------------------------------------------------------
Net asset value, end of
 period...................             $10.94     $10.83     $10.63     $10.23     $10.21     $10.15    $10.19     $9.92     $9.65
- -----------------------------------------------------------------------------------------------------------------------------------
Total return(@)...........               5.17%      5.71%      3.92%      2.77%      3.36%      5.91%     7.87%     9.42%     6.78%
Net assets at end of
 period (000s omitted)....            $61,906    $41,807    $44,833    $28,682    $27,528    $10,737    $8,897    $2,868    $1,939
Ratio of expenses to
 average daily net
 assets...................                .38%       .40%       .40%       .44%       .46%       .55%      .60%      .60%      .60%
Ratio of net investment
 income to average daily
 net assets...............               5.14%      5.44%      3.96%      2.74%      3.51%      5.74%     7.75%     8.03%     7.71%
Portfolio turnover rate...                N/A*       N/A*       N/A*       N/A*       N/A*       N/A*       58%       19%       79%
- -----------------------------------------------------------------------------------------------------------------------------------
 
<FN>
 
  *Pursuant  to Rule 2a-7 under the Investment  Company Act of 1940, under which
   the Money  Market Series  began to  operate  on May  1, 1991,  the  portfolio
   turnover rate is not applicable.
 @These  are the Series' total returns during the period, including reinvestment
  of all dividend and capital gains distributions.
</TABLE>
    
 
                                       2
<PAGE>
 
   
<TABLE>
<CAPTION>
U.S. GOVERNMENT                                                 YEAR ENDED DECEMBER 31,
SECURITIES SERIES      1997        1996        1995        1994        1993        1992       1991       1990      1989      1988
<S>                  <C>         <C>         <C>         <C>         <C>         <C>        <C>        <C>        <C>       <C>
- -----------------------------------------------------------------------------------------------------------------------------------
Net asset value,
 beginning of
 period............                $11.16       $9.40      $10.94      $10.73     $10.77      $9.80      $9.48     $9.04     $9.46
- -----------------------------------------------------------------------------------------------------------------------------------
Operations:
  Investment income
   -- net..........                   .67         .70         .71         .74        .78        .77        .76       .76       .85
  Net realized and
   unrealized gains
   (losses) on
   investments.....                  (.51)       1.06       (1.54)        .46        .15        .98        .31       .45      (.42)
- -----------------------------------------------------------------------------------------------------------------------------------
Total from
 operations........                   .16        1.76        (.83)       1.20        .93       1.75       1.07      1.21       .43
- -----------------------------------------------------------------------------------------------------------------------------------
Distribution to
 shareholders:
  From investment
   income -- net...                  (.75)         --        (.71)       (.74)      (.78)      (.78)      (.75)     (.77)     (.85)
  From net realized
   gains...........                    --          --          --        (.24)      (.19)        --         --        --        --
  Excess
   distributions of
   net realized
   gains...........                    --          --          --        (.01)        --         --         --        --        --
- -----------------------------------------------------------------------------------------------------------------------------------
Total distributions
 to shareholders...                  (.75)         --        (.71)       (.99)      (.97)      (.78)      (.75)     (.77)     (.85)
- -----------------------------------------------------------------------------------------------------------------------------------
Net asset value,
 end of period.....                $10.57      $11.16       $9.40      $10.94     $10.73     $10.77      $9.80     $9.48     $9.04
- -----------------------------------------------------------------------------------------------------------------------------------
Total return(@)....                  2.21%      18.78%      (6.44)%      9.45%      6.14%     14.36%      7.93%    13.14%     6.36%
Net assets at end
 of period (000s
 omitted)..........              $161,678    $182,687    $172,656    $235,588    $132,683   $49,751    $10,750    $2,520    $1,959
Ratio of expenses
 to average daily
 net assets........                   .53%        .53%        .53%        .52%       .57%       .64%       .76%      .75%      .75%
Ratio of net
 investment income
 to average daily
 net assets........                  6.17%       6.78%       6.87%       6.49%      7.10%      7.57%      7.90%     8.55%     8.68%
Portfolio turnover
 rate..............                   176%        115%        187%        141%       135%        77%        17%       23%       83%
- -----------------------------------------------------------------------------------------------------------------------------------
</TABLE>
    
 
   
<TABLE>
<CAPTION>
DIVERSIFIED INCOME                                               YEAR ENDED DECEMBER 31,
SERIES                   1997        1996        1995        1994       1993       1992      1991      1990      1989       1988*
<S>                    <C>         <C>         <C>         <C>        <C>        <C>        <C>       <C>       <C>       <C>
- -----------------------------------------------------------------------------------------------------------------------------------
Net asset value,
 beginning of
 period..............                $12.20      $10.40     $11.93     $11.34     $11.22    $10.40    $10.26     $9.85    $10.02
- -----------------------------------------------------------------------------------------------------------------------------------
Operations:
  Investment income
   -- net............                   .82         .88        .87        .87        .82       .81       .88       .87       .58
  Net realized and
   unrealized gains
   (losses) on
   investments.......                  (.40)        .92      (1.53)      1.03        .33       .87       .13       .40      (.17)
- -----------------------------------------------------------------------------------------------------------------------------------
Total from
 operations..........                   .42        1.80       (.66)      1.90       1.15      1.68      1.01      1.27       .41
- -----------------------------------------------------------------------------------------------------------------------------------
Distribution to
 shareholders:
  From investment
   income -- net.....                  (.91)         --       (.87)      (.87)      (.81)     (.86)     (.87)     (.86)     (.58)
  From net realized
   gains.............                    --          --         --       (.43)      (.21)       --        --        --        --
  Excess
   distributions of
   net realized
   gains.............                  (.01)         --         --       (.01)      (.01)       --        --        --        --
- -----------------------------------------------------------------------------------------------------------------------------------
Total distributions
 to shareholders.....                  (.92)         --       (.87)     (1.31)     (1.03)     (.86)     (.87)     (.86)     (.58)
- -----------------------------------------------------------------------------------------------------------------------------------
Net asset value, end
 of period...........                $11.70      $12.20     $10.40     $11.93     $11.34    $11.22    $10.40    $10.26     $9.85
- -----------------------------------------------------------------------------------------------------------------------------------
Total return(@)......                  4.15%      17.26%     (5.22)%    12.76%      7.08%    14.68%     8.87%    12.30%     3.90%
Net assets at end of
 period (000s
 omitted)............              $105,831    $109,120    $98,314    $92,589    $28,490    $8,503    $4,945    $3,528    $2,579
Ratio of expenses to
 average daily net
 assets..............                   .55%        .55%       .55%       .57%       .67%      .75%      .75%      .75%      .75%**
Ratio of net
 investment income to
 average daily net
 assets..............                  6.86%       7.78%      7.59%      7.15%      7.08%     7.42%     8.27%     8.65%     8.50%**
Portfolio turnover
 rate................                   171%        139%       142%       125%        83%       25%       35%       46%       45%
- -----------------------------------------------------------------------------------------------------------------------------------
<FN>
 *Period from May 2, 1988 to December 31, 1988.
</TABLE>
    
 
   
<TABLE>
<CAPTION>
                                                            YEAR ENDED
                                                           DECEMBER 31,
GLOBAL BOND SERIES                                  1997       1996      1995*
<S>                                               <C>        <C>        <C>
- --------------------------------------------------------------------------------
Net asset value, beginning of period............              $11.30     $10.00
- --------------------------------------------------------------------------------
Operations:
  Investment income -- net......................                 .57        .54
  Net realized and unrealized gains (losses) on
   investments..................................                (.13)      1.52
- --------------------------------------------------------------------------------
Total from operations...........................                 .44       2.06
- --------------------------------------------------------------------------------
Distribution to shareholders:
  From investment income -- net.................                (.43)      (.54)
  From net realized gains.......................                (.20)      (.22)
- --------------------------------------------------------------------------------
Total distribution to shareholders..............                (.63)      (.76)
- --------------------------------------------------------------------------------
Net asset value, end of period..................              $11.11     $11.30
- --------------------------------------------------------------------------------
Total return(@).................................                3.15%     19.02%
Net assets at end of period (000s omitted)......             $20,228    $13,187
Ratio of expenses to average daily net assets...                1.02%      1.28%**
Ratio of net investment income to average daily
 net assets.....................................                5.07%      5.01%**
Portfolio turnover rate.........................                 129%       184%
- --------------------------------------------------------------------------------
<FN>
 *The Series commenced operations on January 3, 1995. The Series' inception  was
  December  14, 1994,  when it was  initially capitalized.  However, the Series'
  shares did not become effectively registered under the Securities Act of  1933
  until  January 3,  1995. Supplementary  information is  not presented  for the
  period from December 14, 1994, through January 3, 1995, as the Series'  shares
  were not registered during that period.
- ------------------------------
**Annualized
 @These  are the Series' total returns during the period, including reinvestment
  of all dividend and capital gains distributions.
</TABLE>
    
 
                                       3
<PAGE>
 
   
<TABLE>
<CAPTION>
                                                         YEAR ENDED DECEMBER 31,
HIGH YIELD SERIES                                1997       1996       1995       1994*
<S>                                            <C>        <C>        <C>        <C>
- ------------------------------------------------------------------------------------------
Net asset value, beginning of period.........               $9.74      $9.47     $10.00
- ------------------------------------------------------------------------------------------
Operations:
  Investment income -- net...................                1.04       1.15        .71
  Net realized and unrealized gains (losses)
   on investments............................                 .13        .30       (.53)
- ------------------------------------------------------------------------------------------
Total from operations........................                1.17       1.45        .18
- ------------------------------------------------------------------------------------------
Distribution to shareholders:
  From investment income -- net..............               (1.03)     (1.14)      (.71)
  Excess distributions of net realized
   gains.....................................                (.05)      (.04)        --
- ------------------------------------------------------------------------------------------
Total distributions to shareholders..........               (1.08)     (1.18)      (.71)
- ------------------------------------------------------------------------------------------
Net asset value, end of period...............               $9.83      $9.74      $9.47
- ------------------------------------------------------------------------------------------
Total return(@)..............................               10.52%     12.73%      (.75)%
Net assets at end of period (000s omitted)...             $42,578    $28,129    $13,706
Ratio of expenses to average daily net
 assets......................................                 .63%       .63%       .75%**
Ratio of net investment income to average
 daily net assets............................               10.22%     11.30%     10.44%**
Portfolio turnover rate......................                 235%       130%        20%
- ------------------------------------------------------------------------------------------
<FN>
 *For the Period May 2, 1994 (commencement of operations) to December 31,  1994.
  The  Series' inception was April 26,  1994, when it was initially capitalized.
  However, the Series' shares  did not become  effectively registered under  the
  Securities  Act of  1933 until May  2, 1994. Supplementary  information is not
  presented for the  period from April  26, 1994,  through May 2,  1994, as  the
  Series' shares were not registered during that period.
</TABLE>
    
 
   
<TABLE>
<CAPTION>
                                                            YEAR ENDED
                                                           DECEMBER 31,
GLOBAL ASSET ALLOCATION SERIES                      1997       1996      1995*
<S>                                               <C>        <C>        <C>
- --------------------------------------------------------------------------------
Net asset value, beginning of period............              $11.42     $10.00
- --------------------------------------------------------------------------------
Operations:
  Investment income -- net......................                 .36        .35
  Net realized and unrealized gains (losses) on
   investments..................................                1.19       1.55
- --------------------------------------------------------------------------------
Total from operations...........................                1.55       1.90
- --------------------------------------------------------------------------------
Distribution to shareholders:
  From investment income -- net.................                (.38)      (.34)
  From net realized gains.......................                (.25)      (.14)
- --------------------------------------------------------------------------------
Total distributions to shareholders.............                (.63)      (.48)
- --------------------------------------------------------------------------------
Net asset value, end of period..................              $12.34     $11.42
- --------------------------------------------------------------------------------
Total return(@).................................               12.72%     17.47%
Net assets at end of period (000s omitted)......             $37,307    $20,080
Ratio of expenses to average daily net assets...                1.20%      1.28%**
Ratio of net investment income to average daily
 net assets.....................................                3.01%      3.26%**
Portfolio turnover rate.........................                  46%        44%
Average commission rate paid***.................             $ .0412        N/A
- --------------------------------------------------------------------------------
<FN>
  *The Series commenced operations on January 3, 1995. The Series' inception was
   December  14, 1994, when  it was initially  capitalized. However, the Series'
   shares did not become effectively registered under the Securities Act of 1933
   until January 3,  1995. Supplementary  information is not  presented for  the
   period from December 14, 1994, through January 3, 1995, as the Series' shares
   were not registered during that period.
</TABLE>
    
 
   
<TABLE>
<CAPTION>
                                                                     YEAR ENDED DECEMBER 31,
ASSET ALLOCATION SERIES         1997       1996       1995       1994       1993       1992      1991      1990     1989     1988
<S>                           <C>        <C>        <C>        <C>        <C>        <C>       <C>       <C>       <C>      <C>
- -----------------------------------------------------------------------------------------------------------------------------------
Net asset value, beginning of
 period......................              $15.90     $13.56     $14.14     $13.28    $12.81    $10.37    $10.59    $8.86    $9.11
- -----------------------------------------------------------------------------------------------------------------------------------
Operations:
  Investment income -- net...                 .61        .65        .56        .52       .62       .59       .57      .49      .52
  Net realized and unrealized
   gains (losses) on
   investments...............                1.38       2.35       (.58)       .92       .47      2.43      (.20)    1.73     (.24)
- -----------------------------------------------------------------------------------------------------------------------------------
Total from operations........                1.99       3.00       (.02)      1.44      1.09      3.02       .37     2.22      .28
- -----------------------------------------------------------------------------------------------------------------------------------
Distribution to shareholders:
  From investment income --
   net.......................                (.61)      (.64)      (.56)      (.52)     (.62)     (.58)     (.59)    (.49)    (.53)
  From net realized gains....                (.28)      (.02)        --       (.06)       --        --        --       --       --
  Excess distributions of net
   realized gains............                (.01)        --         --         --        --        --        --       --       --
- -----------------------------------------------------------------------------------------------------------------------------------
Total distributions to
 shareholders................                (.90)      (.66)     (.56)       (.58)     (.62)     (.58)     (.59)    (.49)    (.53)
- -----------------------------------------------------------------------------------------------------------------------------------
Net asset of value, end of
 period......................              $16.99     $15.90     $13.56     $14.14    $13.28    $12.81    $10.37   $10.59    $8.86
- -----------------------------------------------------------------------------------------------------------------------------------
Total return(@)..............               12.50%     21.97%      (.31)%     9.79%     6.95%    27.65%     2.01%   23.75%    3.71%
Net assets at end of period
 (000s omitted)..............            $397,712   $341,511   $260,593   $204,603   $89,076   $31,821   $13,153   $5,531   $2,485
Ratio of expenses to average
 daily net assets............                 .54%       .55%       .56%       .56%      .60%      .70%      .85%     .75%     .75%
Ratio of net investment
 income to average daily net
 assets......................                3.66%      4.25%      4.05%      3.72%     4.78%     5.04%     5.40%    5.35%    5.82%
Portfolio turnover rate......                 115%        98%        73%        74%       54%       42%       75%      47%      79%
Average commission rate
 paid***.....................            $  .0748        N/A        N/A        N/A       N/A       N/A       N/A      N/A      N/A
- -----------------------------------------------------------------------------------------------------------------------------------
<FN>
 **Annualized
***In  accordance with rules adopted by  the Securities and Exchange Commission,
   disclosure of average commission rate paid is required beginning with  fiscal
   year   1996.  The  amount  represents  total  brokerage  commission  paid  on
   applicable purchases and sales of securities  for the period, divided by  the
   total  number  of related  shares purchased  and sold.  For the  Global Asset
   Allocation Series, the comparability of  this information may be affected  by
   the  fact that  commission rates per  share vary  significantly among foreign
   countries.
 @These are the Series' total returns during the period, including  reinvestment
  of all dividend and capital gains distributions.
</TABLE>
    
 
                                       4
<PAGE>
 
   
<TABLE>
<CAPTION>
                                                        YEAR ENDED
                                                       DECEMBER 31,
VALUE SERIES                                          1997      1996*
<S>                                                 <C>        <C>
- -----------------------------------------------------------------------
Net asset value, beginning of period..............              $10.27
- -----------------------------------------------------------------------
Operations:
  Investment income -- net........................                 .14
  Net realized and unrealized gain (loss) on
   investments....................................                1.10
- -----------------------------------------------------------------------
Total from operations.............................                1.24
- -----------------------------------------------------------------------
Distributions to shareholders:
  From investment income -- net...................                (.13)
- -----------------------------------------------------------------------
Net asset value, end of period....................              $11.38
- -----------------------------------------------------------------------
Total return(@)...................................               11.49%
Net assets at end of period (000s omitted)........             $13,951
Ratio of expenses to average daily net assets.....                 .87%**
Ratio of net investment income to average daily
 net assets.......................................                1.72%**
Portfolio turnover rate...........................                  36%
Average commission rate paid***...................             $ .0556
- -----------------------------------------------------------------------
<FN>
 *For  the period May 1, 1996 (commencement of operations) to December 31, 1996.
  The Series' inception was  March 28, 1996 when  it was initially  capitalized.
  However,  the Series' shares  did not become  effectively registered under the
  Securities Act of 1933 until May 1, 1996. Information is not presented for the
  period from March 28, 1996 through May 1, 1996, as the Series' shares were not
  registered during that period.
</TABLE>
    
 
   
<TABLE>
<CAPTION>
                                                         YEAR ENDED DECEMBER 31,
GROWTH & INCOME SERIES                          1997        1996        1995       1994*
<S>                                           <C>         <C>         <C>        <C>
- -------------------------------------------------------------------------------------------
Net asset value, beginning of period........                $12.83     $10.07     $10.00
- -------------------------------------------------------------------------------------------
Operations:
  Investment income -- net..................                   .34        .33        .21
  Net realized and unrealized gains (losses)
   on investments...........................                  2.54       2.76        .07
- -------------------------------------------------------------------------------------------
Total from operations.......................                  2.88       3.09        .28
- -------------------------------------------------------------------------------------------
Distribution to shareholders:
  From investment income -- net.............                  (.34)      (.33)      (.21)
  From net realized gains...................                  (.21)        --         --
- -------------------------------------------------------------------------------------------
Total distributions to shareholders.........                  (.55)      (.33)      (.21)
- -------------------------------------------------------------------------------------------
Net asset of value, end of period...........                $15.16     $12.83     $10.07
- -------------------------------------------------------------------------------------------
Total return(@).............................                 21.51%     29.70%      1.74%
Net assets at end of period (000s
 omitted)...................................              $134,932    $59,533    $16,276
Ratio of expenses to average daily net
 assets.....................................                   .76%       .80%       .86%**
Ratio of net investment income to average
 daily net assets...........................                  2.38%      2.86%      3.12%**
Portfolio turnover rate.....................                    20%        17%         2%
Average commission rate paid***.............              $  .0688        N/A        N/A
- -------------------------------------------------------------------------------------------
<FN>
 *For the period May 2, 1994 (commencement of operations) to December 31,  1994.
  The  Series' inception was April 26,  1994, when it was initially capitalized.
  However, the Series' shares  did not become  effectively registered under  the
  Securities  Act of  1933 until May  2, 1994. Supplementary  information is not
  presented for the  period from April  26, 1994,  through May 2,  1994, as  the
  Series' shares were not registered during that period.
</TABLE>
    
 
   
<TABLE>
<CAPTION>
                                                        YEAR ENDED
                                                       DECEMBER 31,
S&P 500 INDEX SERIES                                  1997      1996*
<S>                                                 <C>        <C>
- -----------------------------------------------------------------------
Net asset value, beginning of period..............              $10.09
- -----------------------------------------------------------------------
Operations:
  Investment income -- net........................                 .10
  Net realized and unrealized gain (loss) on
   investments....................................                1.37
- -----------------------------------------------------------------------
Total from operations.............................                1.47
- -----------------------------------------------------------------------
Distributions to shareholders:
  From investment income -- net...................                (.09)
- -----------------------------------------------------------------------
Net asset value, end of period....................              $11.47
- -----------------------------------------------------------------------
Total return(@)...................................               14.29%
Net assets at end of period (000s omitted)........             $21,979
Ratio of expenses to average daily net assets.....                 .79%**
Ratio of net investment income to average daily
 net assets.......................................                1.47%**
Portfolio turnover rate...........................                   6%
Average commission rate paid***...................             $ .0477
- -----------------------------------------------------------------------
<FN>
  *For the period May 1, 1996 (commencement of operations) to December 31, 1996.
   The  Series' inception was March 28,  1996 when it was initially capitalized.
   However, the Series' shares did  not become effectively registered under  the
   Securities  Act of 1933 until  May 1, 1996. Information  is not presented for
   the period from March  28, 1996 through  May 1, 1996,  as the Series'  shares
   were not registered during the period.
- ------------------------------
 **Annualized
***In  accordance with  rules adopted by  the Securities  & Exchange Commission,
   disclosure of average commission rate paid is required beginning with  fiscal
   year   1996.  The  amount  represents  total  brokerage  commission  paid  on
   applicable purchases & sales for the  period, divided by the total number  of
   related shares purchased and sold.
 @These  are the Series total returns  during the period, including reinvestment
  of all dividend and capital gains distributions.
</TABLE>
    
 
                                       5
<PAGE>
 
   
<TABLE>
<CAPTION>
                                                        YEAR ENDED
                                                       DECEMBER 31,
BLUE CHIP STOCK SERIES                                1997      1996*
<S>                                                 <C>        <C>
- -----------------------------------------------------------------------
Net asset value, beginning of period..............              $10.07
- -----------------------------------------------------------------------
Operations:
  Investment income -- net........................                 .07
  Net realized and unrealized gain (loss) on
   investments....................................                1.60
- -----------------------------------------------------------------------
Total from operations.............................                1.67
- -----------------------------------------------------------------------
Distributions to shareholders:
  From investment income -- net...................                (.07)
- -----------------------------------------------------------------------
Net asset value, end of period....................              $11.67
- -----------------------------------------------------------------------
Total return(@)...................................               16.24%
Net assets at end of period (000s omitted)........             $17,606
Ratio of expenses to average daily net assets.....                1.13%**
Ratio of net investment income to average daily
 net assets.......................................                 .82%**
Portfolio turnover rate...........................                  17%
Average commission rate paid***...................             $ .0329
- -----------------------------------------------------------------------
<FN>
 *For the period May 1, 1996 (commencement of operations) to December 1996.  The
  Series'  inception  was March  28, 1996,  when  it was  initially capitalized.
  However, the Series' shares  did not become  effectively registered under  the
  Securities Act of 1933 until May 1, 1996. Information is not presented for the
  period  from March 28, 1996,  through May 1, 1996,  as the Series' shares were
  not registered during the period.
</TABLE>
    
 
   
<TABLE>
<CAPTION>
                                                            YEAR ENDED
                                                           DECEMBER 31,
INTERNATIONAL STOCK SERIES                          1997       1996      1995*
<S>                                               <C>        <C>        <C>
- --------------------------------------------------------------------------------
Net asset value, beginning of period............              $11.27     $10.00
- --------------------------------------------------------------------------------
Operations:
  Investment income -- net......................                 .20        .14
  Net realized and unrealized gains (losses) on
   investments..................................                1.48       1.38
- --------------------------------------------------------------------------------
Total from operations...........................                1.68       1.52
- --------------------------------------------------------------------------------
Distribution to shareholders:
  From investment income -- net.................                (.21)      (.09)
  From net realized gains.......................                (.30)      (.16)
- --------------------------------------------------------------------------------
Total distributions to shareholders.............                (.51)      (.25)
- --------------------------------------------------------------------------------
Net asset value, end of period..................              $12.44     $11.27
- --------------------------------------------------------------------------------
Total return(@).................................               14.02%     14.35%
Net assets at end of period (000s omitted)......             $52,331    $21,327
Ratio of expenses to average daily net assets...                1.15%      1.14%**
Ratio of net investment income to average daily
 net assets.....................................                1.71%      1.41%**
Portfolio turnover rate.........................                  27%        39%
Average commission rate paid***.................             $ .0363        N/A
- --------------------------------------------------------------------------------
<FN>
 *The Series commenced operations on January 3, 1995. The Series' inception  was
  December  14, 1994,  when it was  initially capitalized.  However, the Series'
  shares did not become effectively registered under the Securities Act of  1933
  until  January 3,  1995. Supplementary  information is  not presented  for the
  period from December 14, 1994, through January 3, 1995, as the Series'  shares
  were not registered during that period.
</TABLE>
    
 
   
<TABLE>
<CAPTION>
                                                                           YEAR ENDED DECEMBER 31,
GLOBAL GROWTH SERIES                                  1997        1996        1995        1994        1993       1992*
<S>                                                 <C>         <C>         <C>         <C>         <C>        <C>
- -------------------------------------------------------------------------------------------------------------------------
Net asset value, beginning of period..............                $15.97      $12.31      $12.77     $10.86      $9.82
- -------------------------------------------------------------------------------------------------------------------------
Operations:
  Investment income -- net........................                   .03         .09         .10        .06        .05
  Net realized and unrealized gains (losses) on
   investments....................................                  3.03        3.66        (.46)      1.91       1.04
- -------------------------------------------------------------------------------------------------------------------------
Total from operations.............................                  3.06        3.75        (.36)      1.97       1.09
- -------------------------------------------------------------------------------------------------------------------------
Distribution to shareholders:
  From investment income -- net...................                  (.03)       (.09)       (.10)      (.06)      (.05)
- -------------------------------------------------------------------------------------------------------------------------
Net asset value, end of period....................                $19.00      $15.97      $12.31     $12.77     $10.86
- -------------------------------------------------------------------------------------------------------------------------
Total return(@)...................................                 19.10%      30.49%      (2.98)%    17.92%     10.88%
Net assets at end of period (000s omitted)........              $319,831    $207,913    $144,647    $75,882    $11,091
Ratio of expenses to average daily net assets.....                   .79%        .80%        .81%      1.02%      1.22%**
Ratio of net investment income to average daily
 net assets.......................................                   .15%        .64%        .82%       .53%       .73%**
Portfolio turnover rate...........................                    14%         29%         20%        19%        21%
Average commission rate paid***...................              $  .0295         N/A         N/A        N/A        N/A
- -------------------------------------------------------------------------------------------------------------------------
<FN>
  *For the period May 1, 1992 (commencement of operations) to December 31, 1992.
   The  Series' inception was April 13, 1992, when it was initially capitalized.
   However, the Series' shares did  effectively registered under the  Securities
   Act of 1933 until May 1, 1992. Supplementary information is not presented for
   the  period from April 13,  1992, through May 1,  1992, as the Series' shares
   were not registered during that period.
- ------------------------------
 **Annualized.
***In accordance with rules adopted  by the Securities and Exchange  Commission,
   disclosure  of average commission rate paid is required beginning with fiscal
   year  1996.  The  amount  represents  total  brokerage  commission  paid   on
   applicable  purchases and sales of securities  for the period, divided by the
   total number of  related shares  purchased and  sold. For  Global Growth  the
   comparability of this information may be affected by the fact that commission
   rates per share vary significantly among foreign countries.
 @These  are the Series' total returns during the period, including reinvestment
  of all dividend and capital gains distributions.
</TABLE>
    
 
                                       6
<PAGE>
 
   
<TABLE>
<CAPTION>
                                                                     YEAR ENDED DECEMBER 31,
GROWTH STOCK SERIES             1997       1996       1995       1994       1993       1992       1991     1990     1989     1988
<S>                           <C>        <C>        <C>        <C>        <C>        <C>        <C>       <C>      <C>      <C>
- -----------------------------------------------------------------------------------------------------------------------------------
Net asset value, beginning of
 period......................              $28.09     $22.11     $22.92     $21.15     $20.68    $13.57   $14.26   $10.59   $10.42
- -----------------------------------------------------------------------------------------------------------------------------------
Operations:
  Investment income -- net...                 .12        .13        .18        .09        .18       .22      .38      .26      .29
  Net realized and unrealized
   gains (losses) on
   investments...............                4.50       5.98       (.81)      1.77        .47      7.11     (.69)    3.67      .16
- -----------------------------------------------------------------------------------------------------------------------------------
Total from operations........                4.62       6.11       (.63)      1.86        .65      7.33     (.31)    3.93      .45
- -----------------------------------------------------------------------------------------------------------------------------------
Distribution to shareholders:
  From investment income --
   net.......................                (.12)      (.13)      (.18)      (.09)      (.18)     (.22)    (.38)    (.26)    (.28)
  From net realized gains....                  --         --         --         --         --        --       --       --       --
- -----------------------------------------------------------------------------------------------------------------------------------
Total distributions to
 shareholders................                (.12)      (.13)      (.18)      (.09)      (.18)     (.22)    (.38)    (.26)    (.28)
- -----------------------------------------------------------------------------------------------------------------------------------
Net asset value, end of
 period......................              $32.59     $28.09     $22.11     $22.92     $21.15    $20.68   $13.57   $14.26   $10.59
- -----------------------------------------------------------------------------------------------------------------------------------
Total return(@)..............               16.41%     27.66%     (2.82)%     8.78%      2.94%    53.50%   (3.10)%  36.46%    4.49%
Net assets at end of period
 (000s omitted)..............            $661,217   $530,945   $377,483   $304,293   $188,172   $100,690  $25,623  $8,632   $3,023
Ratio of expenses to average
 daily net assets............                 .67%       .67%       .68%       .69%       .76%      .81%    1.01%    1.00%    1.00%
Ratio of net investment
 income to average daily net
 assets......................                 .39%       .51%       .81%       .46%       .92%     1.28%    2.72%    2.03%    2.76%
Portfolio turnover rate......                  30%        20%        19%        26%        24%       31%      50%      40%      85%
Average commission rate
 paid***.....................            $  .0728        N/A        N/A        N/A        N/A       N/A      N/A      N/A      N/A
- -----------------------------------------------------------------------------------------------------------------------------------
<FN>
</TABLE>
    
 
   
<TABLE>
<CAPTION>
                                                                YEAR ENDED DECEMBER 31,
AGGRESSIVE GROWTH SERIES                          1997         1996         1995            1994*
<S>                                            <C>          <C>          <C>          <C>
- --------------------------------------------------------------------------------------------------------
Net asset value, beginning of period.........                 $12.68        $9.80         $10.03
- --------------------------------------------------------------------------------------------------------
Operations:
  Investment income -- net...................                    .03          .07            .08
  Net realized and unrealized gains (losses)
   on investments............................                    .94         2.88           (.23)
- --------------------------------------------------------------------------------------------------------
Total from operations........................                    .97         2.95           (.15)
- --------------------------------------------------------------------------------------------------------
Distribution to shareholders:
  From investment income -- net..............                   (.03)        (.07)          (.08)
- --------------------------------------------------------------------------------------------------------
Net asset value, end of period...............                 $13.62       $12.68          $9.80
- --------------------------------------------------------------------------------------------------------
Total return(@)..............................                   7.64%       29.89%         (1.89)%
Net assets at end of period (000s omitted)...               $ 96,931     $ 46,943     $   13,526
Ratio of expenses to average daily net
 assets......................................                    .78%         .81%           .88%**
Ratio of net investment income to average
 daily net assets............................                    .22%         .58%          1.24%**
Portfolio turnover rate......................                     22%          21%             5%
Average commission rate paid***..............               $  .0692          N/A            N/A
- --------------------------------------------------------------------------------------------------------
<FN>
  *For the period May 2, 1994 (commencement of operations) to December 31, 1994.
   The Series' inception was April 26, 1994, when it was initially  capitalized.
   However,  the Series' shares did not  become effectively registered under the
   Securities Act of 1933  until May 2, 1994.  Supplementary information is  not
   presented  for the period  from April 26,  1994, through May  2, 1994, as the
   Series' shares were not registered during that period.
- ------------------------------
 **Annualized.
***In accordance with rules adopted  by the Securities and Exchange  Commission,
   disclosure  of average commission rate paid is required beginning with fiscal
   year  1996.  The  amount  represents  total  brokerage  commission  paid   on
   applicable  purchases and sales of securities  for the period, divided by the
   total number of related  shares purchased and  sold. For International  Stock
   Series,  the comparability  of this information  may be affected  by the fact
   that commission rates per share vary significantly among foreign countries.
 @These are the Series' total returns during the period, including  reinvestment
  of all dividend and capital gains distributions.
</TABLE>
    
 
   
The  Series may  advertise their "cumulative  total return"  and "average annual
total  return"  and  may  compare  such  figures  to  recognized  indices.  U.S.
Government  Securities Series,  Diversified Income  Series, Global  Bond Series,
High Yield Series, Global Asset  Allocation Series, and Asset Allocation  Series
may advertise their "yield." When they advertise yield, they will also advertise
"average  annual  total return"  for the  most  recent one,  five, and  ten year
periods. Money Market Series  may advertise its  "yield" and "effective  yield."
Any advertisement of a Series' performance will be accompanied by performance of
the  Separate  Account being  advertised. (See  "The  Separate Accounts  and the
Contracts.") Fortis Series may advertise its relative performance as compiled by
outside organizations such as Lipper Analytical or CDA/Wiesenberger, or refer to
publications which have mentioned Fortis Series, Fortis Advisers, Inc., or their
personnel, and also may  advertise other performance items  as set forth in  the
Statement  of Additional Information. The performance discussion required by the
Securities and Exchange Commission is found  in Fortis Series' Annual Report  to
Shareholders and will be made available without charge upon request.
    
 
ORGANIZATION AND CLASSIFICATION
 
   
Fortis  Series was incorporated  under Minnesota law in  1986, and is registered
with the Securities and Exchange Commission under the Investment Company Act  of
1940  (the "1940  Act") as an  "open-end management  investment company." Fortis
Series currently consists  of eighteen  separate investment  portfolios (each  a
"Series") as set forth on the cover page of this Prospectus. Each Series, except
Global  Bond Series, is classified as a diversified investment company under the
1940 Act.  Global Bond  Series  is classified  as a  non-diversified  investment
company.  Each Series is, for investment purposes, a separate investment fund. A
separate series  of capital  stock is  issued  for each  Series. Each  share  of
capital  stock issued with  respect to a  Series has a  pro-rata interest in the
assets of that Series  and has no  interest in the assets  of any other  Series.
Each  Series bears its own  liabilities and also its  proportionate share of the
general liabilities of Fortis Series.
    
 
                                       7
<PAGE>
THE SEPARATE ACCOUNTS AND THE CONTRACTS
 
Shares in  Fortis Series  are  currently sold  to  separate accounts  of  Fortis
Benefits  and First  Fortis which  fund benefits  under variable  life insurance
policies and  variable annuity  contracts issued  by Fortis  Benefits and  First
Fortis.  Each Contract owner  allocates Contract value  among the subaccounts of
the Separate  Accounts, which  in turn  invest in  the corresponding  Series  of
Fortis  Series. The  rights of the  Separate Accounts as  shareholders should be
distinguished from the rights  of a Contract owner,  which are described in  the
Contract.  The term "shareholder" or "shareholders" in this Prospectus refers to
Fortis Benefits, First Fortis, any of  their affiliates, or any other  insurance
company  that  owns  Fortis Series  shares.  "Contract owner"  means  the owner,
annuitant, or beneficiary that is entitled to exercise the rights and privileges
under a Contract.
 
INVESTMENT OBJECTIVES AND POLICIES; RISK CONSIDERATIONS
 
Each Series  has  different  investment  objectives  which  it  pursues  through
different  investment policies as described  below. The investment objectives of
the Series and, except as otherwise noted, the policies by which the Series seek
to achieve their investment objectives, may  be changed without the approval  of
shareholders.  While no such change is  contemplated, such a change could result
in a Series' objectives differing from  those deemed appropriate by an  investor
at the time of investment.
 
   
Through  careful  selection,  broad  diversification  and  constant supervision,
Fortis Series' management  aims to limit  and counteract various  types of  risk
that are inherent in all securities and advance the value of the Series' assets.
There  is  risk in  all investments  and fulfillment  of the  Series' objectives
cannot be assured.  These risks  are discussed below  under sections  describing
each  Series,  as well  as under  the  section "General  Risks to  Consider." In
addition, no Series is intended to  be a complete investment program,  therefore
it may serve to diversify an investor's portfolio.
    
 
   
Fortis Advisers, Inc. ("Advisers") is the investment adviser for each Series. As
noted  below, Advisers has retained a sub-adviser for eight Series. In selecting
equity securities for the domestic equity Series for which Advisers does not use
a sub-adviser,  Advisers  uses  two  distinct  equity  investment  philosophies.
Specifically,  Asset Allocation, Growth Stock and Aggressive Growth Series use a
"growth" philosophy and Value Series uses a "value" philosophy. Growth &  Income
Series  may at times  use either or both  philosophies. Under both philosophies,
Advisers uses a "bottom up" investment style in which stock selection is  driven
primarily by the merits of the company itself.
    
 
In  managing "growth" portfolios, Advisers invests  based on a concept of growth
potential, seeking  to  identify companies  whose  earnings and  revenue  growth
potential  exceed  industry averages.  In addition  to superior  earnings growth
potential, Advisers seeks companies  which it believes to  be well managed  with
above average returns on equity and invested capital, healthy balance sheets and
the  potential to  gain market  share. Companies  of this  nature typically have
above average  growth  potential  and  a  correspondingly  higher  than  average
valuation  level as measured by price to  earnings, price to cash flow and price
to book value ratios.
 
In  managing  "value"  portfolios,  Advisers  invests  based  on  a  concept  of
fundamental value, seeking to identify companies whose shares appear inexpensive
relative  to anticipated  profit and  dividend growth.  The primary  emphasis is
placed on  companies  expected  to  experience  a  significant  acceleration  in
earnings over the next three to five years. The prices of these stocks typically
do  not reflect such improvement. Often a stock is "out of favor" and priced low
relative to the company's earnings, cash flow and book value. A second source of
"value" stocks are companies expected to  sustain their historic rate of  growth
but  which are  selling at  a low price  to earnings  ratio in  relation to this
anticipated growth.
 
MONEY MARKET SERIES
 
The objectives of Money Market Series  are high levels of capital stability  and
liquidity  and, to the  extent consistent with these  primary objectives, a high
level of current income. Money Market Series intends to achieve these objectives
through investment in a diversified portfolio of commercial paper and other debt
securities.
 
   
Money Market Series is somewhat different from a traditional money market mutual
fund in that  it does not  attempt to maintain  its net asset  value at any  set
price.  It  has a  nonfundamental investment  policy requiring  that all  of its
assets be invested  in debt  securities maturing in  13 months  or less,  except
United  States Government Securities as defined in the 1940 Act, whose portfolio
maturities cannot be  more than 25  months from the  date of acquisition.  Money
Market  Series will maintain a dollar  weighted average portfolio maturity of 90
days or less.
    
 
   
Pursuant to Rule 2a-7 under  the 1940 Act, Money  Market Series will not  invest
more  than 5% of  its total assets in:  (1) securities of  any one issuer (other
than cash or United  States Government Securities as  defined in the 1940  Act),
except that the Series may at any one time make a single investment of more than
5%  of its assets in securities of an  issuer in the highest rating category for
up to three business  days (subject to the  diversification requirements of  the
1940  Act,  as set  forth under  "Investment  Policies, Restrictions,  and Risks
Applicable to More  Than One  Series"); or (2)  securities rated  in the  second
highest  rating  category--  with  investments in  the  second  highest category
further limited with respect to  any particular issuer to  the greater of 1%  of
total  assets or  $1,000,000. Certain  of the provisions  of Rule  2a-7 are more
restrictive than  Money  Market  Series' investment  policies  and  restrictions
described  below; Money Market  Series' investments will be  limited to the more
restrictive provisions of Rule 2a-7.
    
 
Money Market  Series pursues  its  objectives by  investing exclusively  in  the
following:
 
    1.  Obligations of domestic issuers  (which include, for example, commercial
paper and other debt obligations) which meet the quality and other standards  of
Rule 2a-7 (or successors thereto) under the 1940 Act.
 
   
    2.  Securities  of,  or guaranteed  by,  the United  States  Government, its
agencies or instrumentalities. For a discussion of this type of security and the
federal income  tax diversification  requirements applicable  to investments  in
this type of security, see "U.S. Government Securities Series" below.
    
 
    3. Securities (payable in U.S. dollars) of, or guaranteed by, the government
of  Canada  or  a  province  of  Canada  or  any  instrumentality  or  political
subdivision thereof, such securities not to  exceed 25% of Money Market  Series'
total assets, and securities of foreign companies (which do not include domestic
branches  of  foreign  banks  and  foreign  branches  of  domestic  banks), such
securities not  to  exceed  15%  of  Money  Market  Series'  total  assets.  See
"Investment  Policies,  Restrictions,  and  Risks Applicable  to  More  Than One
Series--Investment in  Foreign Securities"  for a  discussion of  certain  risks
connected with investing in foreign securities.
 
    4.  Obligations of:  (a) domestic  or foreign  banks having  total assets in
excess of one billion dollars or of any branches of such banks, whether domestic
or foreign; or (b) in other foreign issuers; provided, that no more than 49%  of
Money  Market Series' total  assets may be  so invested in  all such securities.
Such obligations of domestic and foreign banks may include, but are not  limited
to,  certificates of deposit,  letters of credit,  and bankers' acceptances. For
this purpose, "bank" includes  commercial banks, savings  banks and savings  and
loan associations. Overall, with
 
                                       8
<PAGE>
respect  to investments set forth  in this paragraph and  in paragraph 3, above,
Money Market Series  may not  invest more  than 49% of  the value  of its  total
assets  collectively in: (i) securities of,  or guaranteed by, the government of
Canada, a province of  Canada, or any  instrumentality or political  subdivision
thereof;  (ii) securities of foreign companies; and (iii) securities of domestic
branches of foreign banks and foreign branches of domestic banks.
 
There are risks associated with  investments in obligations of foreign  branches
of  domestic banks and domestic branches of  foreign banks that do not accompany
investments in  obligations  of domestic  banks  generally. Domestic  banks  are
required  to maintain specified  levels of reserves, are  limited in the amounts
they can  loan  to a  single  borrower, and  are  subject to  other  regulations
designed  to promote financial  soundness. Not all of  such laws and regulations
apply to foreign  branches of domestic  banks. Money Market  Series may also  be
subject  to additional  investment risks  from investing  in the  obligations of
foreign branches  of domestic  banks. Such  risks include  future political  and
economic  developments, the possible imposition  of foreign withholding taxes on
interest income payable on securities,  the possible seizure or  nationalization
of  foreign deposits,  the possible establishment  of exchange  controls, or the
adoption of other foreign governmental restrictions which might adversely affect
the payment of principal  and interest on such  obligations. The obligations  of
domestic branches of foreign banks may also be subject to other risks, including
political and economic developments in the country in which the foreign bank has
its  main  office. There  may  be less  publicly  available information  about a
domestic branch  of a  foreign bank  than about  a domestic  bank. In  addition,
obligations  of  foreign branches  of domestic  banks  and domestic  branches of
foreign banks are not insured by the Federal Deposit Insurance Corporation.
 
    5. Extendible notes  that provide for  an optional maturity  date, at  Money
Market  Series'  option, of  13 months  or  less from  the date  of acquisition.
Extendible notes issued with maturity dates in excess of 13 months from the date
of issuance that provide for optional maturity dates, at the holder's option, of
13 months or less  shall be deemed  by Money Market Series  to have been  issued
with  the shorter optional  maturity dates. Such extendible  notes must meet the
quality and other  standards of Rule  2a-7 (or successors  thereto) and may  not
account for greater than 25% of the total assets of Money Market Series.
 
    6.  Repurchase agreements in connection  with obligations which are suitable
for investment under the categories set forth above.
 
    7.  Obligations  other  than  those  listed  above  if  the  obligation   is
accompanied  by  a  guarantee  of  principal  and  interest,  provided  that the
guarantee is that  of a  bank or corporation  whose certificates  of deposit  or
commercial paper may otherwise be purchased by Money Market Series.
 
U.S. GOVERNMENT SECURITIES SERIES
 
The  investment objective  of U.S. Government  Securities Series  is to maximize
total return (from income and market value change), while providing shareholders
with a high level of current income consistent with prudent investment risk.
 
In pursuing its  objective, U.S.  Government Securities Series'  assets will  be
invested in the following manner:
 
    A. At least 65% of the Series' assets will be invested in securities issued,
guaranteed,  insured,  or collateralized  by the  United States  government, its
agencies, or instrumentalities  (whether or not  backed by the  "full faith  and
credit"  pledge of the  United States government),  and in repurchase agreements
pertaining to such securities. Securities  issued or guaranteed as to  principal
and  interest by the  United States government include  a variety of securities,
which differ in their interest rates, maturities, and dates of issuance.
 
In addition  to  Treasury obligations,  U.S.  Government Securities  Series  may
invest  in the following:  (1) obligations of  United States government agencies
and instrumentalities which  are secured  by the full  faith and  credit of  the
United  States  Treasury,  such  as  Government  National  Mortgage  Association
pass-through certificates; (2) obligations which are secured by the right of the
issuer to borrow  from the Treasury,  such as securities  issued by the  Federal
Financing  Bank or the  United States Postal Service;  and (3) obligations which
are supported by the credit of the government agency or instrumentality  itself,
such  as  securities of  the  Federal Home  Loan  Bank or  the  Federal National
Mortgage  Association.  U.S.  Government   Securities  Series  will  invest   in
securities  which are  not backed  by the  full faith  and credit  of the United
States Treasury only when the credit risk with respect to the instrumentality or
agency issuing such securities does not make the securities, in the judgment  of
Advisers, unsuitable investments for the Series.
 
Types  of mortgage-backed securities include "pass-through" securities, modified
pass-through securities, participation certificates, and collateralized mortgage
obligations.
 
There is no percentage limitation on U.S. Government Securities Series' purchase
of mortgage-backed securities issued, guaranteed, insured, or collateralized  by
the  United States  government, its  agencies, or  instrumentalities, except for
limitations that may be imposed from time to time by the Internal Revenue  Code.
U.S.  Government Securities Series may also invest in mortgage-backed securities
issued and insured by private organizations  if such securities fall within  the
investment restrictions for marketable straight debt securities set forth below.
 
    B.  Up to 35% of U.S. Government Securities Series' total assets may consist
of:
 
   (1) Marketable non-convertible debt securities which are rated at the time of
purchase within the three highest  grades assigned by Moody's Investors  Service
("Moody's")  (Aaa, Aa or A) or Standard  & Poor's Ratings Services ("S&P") (AAA,
AA or A), or  comparably rated by another  nationally recognized rating  agency;
see the Appendix to this Prospectus for a discussion of S&P and Moody's ratings;
 
   (2) Marketable securities (payable in U.S. dollars) of, or guaranteed by, the
government of Canada or a province of Canada or any instrumentality or political
subdivision  thereof (such securities  not to exceed 25%  of the U.S. Government
Securities Series' total assets);
 
   (3) Obligations of, or guaranteed by, U.S. banks, which obligations, although
not rated as  a matter of  policy by either  Moody's or S&P,  are considered  by
Advisers  to  have  investment quality  comparable  to securities  which  may be
purchased under item (1) above  (such securities not to  exceed 25% of the  U.S.
Government Securities Series' total assets);
 
   (4)  Commercial paper obligations rated Prime-1 by  Moody's or A-1 by S&P, or
comparably rated  by  another  nationally  recognized  rating  agency.  See  the
Appendix to this Prospectus for a discussion of S&P and Moody's ratings; and
 
   (5)  Cash, other non-securities assets  such as accrued interest, receivables
from investment securities sold, prepaid expenses, as well as other high quality
short term interest bearing debt securities not discussed above.
 
The foregoing percentage limitations will apply  at the time of the purchase  of
the securities.
 
U.S. Government Securities Series may invest in repurchase agreements.
 
Market  prices  of the  securities in  which  U.S. Government  Securities Series
invests will  fluctuate  and  will  tend  to  vary  inversely  with  changes  in
 
                                       9
<PAGE>
prevailing  interest rates. If interest rates  increase from the time a security
is purchased, such security,  if sold, might  be sold at a  price less than  its
purchase cost. Conversely, if interest rates decline from the time a security is
purchased,  such security, if  sold, might be  sold at a  price greater than its
purchase cost.
 
DIVERSIFIED INCOME SERIES
 
The objective of the Diversified Income Series is to maximize total return (from
income and  market  value  change)  by  investing  primarily  in  a  diversified
portfolio  of government  securities and  investment grade  corporate bonds. The
Diversified Income Series will pursue  its objective by investing, under  normal
circumstances,  at  least  70%  of  its total  assets  in  (a)  investment grade
corporate fixed income securities,  which are generally  considered to be  those
fixed  income securities rated within one of the four highest grades assigned by
Moody's (Aaa, Aa, A and Baa) or by S&P (AAA, AA, A and BBB), or comparably rated
by  another  nationally  recognized   rating  agency;  (b)  securities   issued,
guaranteed  or  insured  by the  United  States  Government or  its  agencies or
instrumentalities; (c) mortgage related securities in which the U.S.  Government
Securities  Series  may invest;  (d)  repurchase agreements  pertaining  to such
securities; (e) commercial paper of companies  having, at the time of  purchase,
an  issue of outstanding debt securities rated Baa or above by Moody's or BBB or
above by  S&P,  or comparably  rated  by another  nationally  recognized  rating
agency, or commercial paper rated P-1 or P-2 by Moody's or A-1 or A-2 by S&P, or
comparably  rated by another  nationally recognized rating  agency; and (f) cash
and income producing cash equivalents.
 
Additionally, under normal circumstances,  up to 30%  of the Diversified  Income
Series'  total  assets may  be invested  in  any combination  of (a)  common and
preferred stocks  and convertible  securities;  (b) dollar  denominated  foreign
securities (provided that such investments in foreign securities will be limited
to  10%  of  the  total  assets  of  the  Diversified  Income  Series);  and (c)
non-investment grade bonds (sometimes referred to as "junk bonds") and non-rated
corporate bonds. The lowest  eligible rating category  in which the  Diversified
Income Series will invest are Caa as determined by Moody's and CCC as determined
by  S&P, or  comparably rated  by another  nationally recognized  rating agency,
except that up  to 10% of  the assets of  the Diversified Income  Series may  be
invested  in nonperforming securities rated lower than these categories or which
are unrated.  See "High  Yield Series--Risks  of Transactions  in  High-Yielding
Securities." The Diversified Income Series may retain a portfolio security whose
rating  has  changed  if the  security  otherwise meets  the  Diversified Income
Series' investment objectives and investment criteria.
 
   
The table below shows the weighted average percentages of the Diversified Income
Series' long-term bond  investments during  the fiscal year  ended December  31,
1997,  represented by  (1) bonds  rated by  a nationally  recognized statistical
rating organization, separated into  each rating category,  and (2) all  unrated
bonds as a group.
    
 
   
<TABLE>
<CAPTION>
STANDARD & POOR'S RATING                             PERCENT OF TOTAL
(OR EQUIVALENT)                                        INVESTMENTS
- --------------------------------------------------  ------------------
<S>                                                 <C>
AAA...............................................           %
AA................................................           %
A.................................................           %
BBB...............................................           %
BB................................................           %
B.................................................           %
CCC...............................................           %
CC................................................           %
C.................................................           %
D.................................................           %
All unrated bonds as a group......................           %
                                                        -----
                                                        100.0%
                                                        -----
                                                        -----
</TABLE>
    
 
For  an explanation of  investment quality ratings assigned  by Moody's and S&P,
see the Appendix.
 
GLOBAL BOND SERIES
 
The investment objective of the Global Bond Series is total return from  current
income  and capital appreciation. The Global Bond Series invests its assets in a
global portfolio principally consisting of high quality fixed-income  securities
of  governmental and  corporate issuers  and supranational  organizations, which
securities have varying  maturities and are  denominated in various  currencies,
including  the U.S. dollar.  The Series may  invest in any  region of the world,
including the  United States.  As discussed  below under  "Investment  Policies,
Restrictions,  and Risks  Applicable to  More Than  One Series--Foreign Currency
Forward  Exchange   Contracts,"   the  Global   Bond   Series  may   engage   in
hedging/cross-hedging  transactions;  typically however  the Global  Bond Series
will be invested in the  same number of currencies as  countries in which it  is
invested.
 
It is the present intention of the Series' sub-adviser, Mercury Asset Management
International   Ltd.  ("Mercury  International")  (formerly  known  as  "Warburg
Investment Management International  Ltd."), to invest  the Global Bond  Series'
assets   principally  in   fixed-income  securities  of   companies  within,  or
governments of,  the  United States,  Continental  Europe, the  United  Kingdom,
Canada,  the Pacific  Basin and  in such  other areas  and countries  as Mercury
International may  determine from  time to  time, including  countries that  are
considered  emerging market countries at the time of investment. At all times at
least 80%  of  the Series'  assets  will  be invested  in  developed  countries.
Developed  countries  include  Canada,  the  United  Kingdom,  France,  Germany,
Australia, New  Zealand, Austria,  Belgium,  Denmark, Finland,  Ireland,  Italy,
Japan,  Luxembourg, the Netherlands, Norway,  Spain, Sweden, Switzerland and the
United States.  For a  description of  the risks  associated with  investing  in
foreign securities, see "Investment Policies, Restrictions, and Risks Applicable
to More Than One Series--Investment in Foreign Securities."
 
In  pursuing its investment objective, the Global Bond Series invests in a broad
range of  fixed-income  securities.  Under  normal  market  conditions,  Mercury
International  anticipates  that  the  Series  will  be  invested  primarily  in
fixed-income securities  issued  or  guaranteed by  (a)  governments  and  their
agencies   and  instrumentalities,  (b)   government-related  issuers,  and  (c)
supranational organizations  (such  as the  World  Bank, The  European  Economic
Community,   The  Asian  Development  Bank  and  The  European  Coal  and  Steel
Community). The Series also invests in corporate fixed-income securities  issued
by  foreign or U.S. companies; certificates  of deposit and bankers' acceptances
issued or  guaranteed  by, or  time  deposits maintained  at,  banks  (including
foreign  branches of U.S. banks  or U.S. or foreign  branches of foreign banks);
and  commercial  paper  issued  by  foreign  or  U.S.  companies.  Under  normal
conditions,  at least 90% of the Global  Bond Series' assets will be invested in
high quality securities, I.E., securities that are rated AA or better by S&P  or
Aa  or better  by Moody's or  comparably rated by  another nationally recognized
rating agency, or, if unrated, are determined by Mercury International to be  of
comparable  quality. At no  time will the  Series invest in  securities that are
rated below "A" or, if unrated, are determined by Mercury International to be of
comparable quality. See the  Appendix attached hereto for  a description of  the
ratings of fixed-income securities and commercial paper.
 
When,  in  Mercury International's  judgment,  business or  financial conditions
warrant, the Global Bond  Series may assume a  temporary defensive position  and
invest  without limit  in high  quality short-term  debt securities  or hold its
assets in cash. See "Investment Policies, Restrictions, and Risks Applicable  to
More  Than  One  Series--Short-Term  Money  Market  Instruments."  During  those
intervals when the Series has assumed a temporary defensive position, the Series
will not be pursuing its investment objective.
 
                                       10
<PAGE>
The maturities of investments held by the Global Bond Series are not subject  to
any  prescribed limits. A longer average maturity is generally associated with a
higher level of volatility in the  market value of a fixed-income security.  The
maturity  of a security  measures only the  time until final  payment is due; it
takes no  account  of  the pattern  of  the  security's cash  flows  over  time,
including  how cash flow is  affected by prepayments and  by changes in interest
rates. The average "duration" of the  Global Bond Series will vary depending  on
anticipated  market conditions. The  Series' average "duration"  is a measure of
the price sensitivity of its investment portfolio, including expected cash flow,
redemptions and  mortgage  prepayments  under  a wide  range  of  interest  rate
conditions.  In  computing the  duration  of the  Series'  investment portfolio,
Mercury International will estimate the duration of obligations that are subject
to prepayment or redemption by the  issuer taking into account the influence  of
interest  rates. The Series' average duration generally will be shorter than the
Series' average maturity. Under normal market conditions, Mercury  International
anticipates  that the  average weighted  duration of the  Series will  be in the
range of two to eight years.
 
HIGH YIELD SERIES
 
The investment objective of High Yield Series is to maximize total return  (from
income  and  market  value  change)  by  investing  primarily  in  a diversified
portfolio of high-yield, high-risk, fixed-income securities (sometimes  referred
to as "junk bonds"). Under normal economic circumstances, High Yield Series will
invest  at least 65% of its total assets  in lower grade (as defined below) debt
securities, convertible securities,  options on debt  securities, interest  rate
futures  contracts and options  thereon, common and  preferred stocks, and other
equity securities when these types of instruments are consistent with High Yield
Series' investment objective. High Yield Series' remaining assets may be held in
cash or cash equivalents or invested in investment grade debt instruments.
 
The higher  yields that  High  Yield Series  seeks  are usually  available  from
lower-grade  securities--those rated lower than Baa by Moody's or lower than BBB
by S&P, or comparably rated by another nationally recognized rating agency,  and
unrated  securities of similar quality. This is an aggressive approach to income
investing and  is subject  to  greater risk  than  investing in  higher  quality
securities.  The  High  Yield  Series  may  invest  without  limitation  in  any
"eligible" rating category. The lowest eligible rating categories in which  High
Yield  Series will invest are Caa as determined by Moody's and CCC as determined
by S&P,  or comparably  rated by  another nationally  recognized rating  agency,
except  that up to 10%  of the Series' total assets  (at the time of investment)
may  be  invested  in  "non-performing"   securities  rated  lower  than   these
categories.  Securities in the Caa/CCC rating categories are considered to be of
poor standing and  are predominantly  speculative. Lower ratings  may reflect  a
greater  possibility  that the  financial condition  of  the issuer,  or adverse
changes in general economic conditions, or  both, may impair the ability of  the
issuer  to make payments of interest and principal. Additionally, investments in
securities rated  Caa  or  CCC  involve significant  risk  exposure  to  adverse
conditions.  Such securities may be in default, or there may be present elements
of danger with respect to the payment of principal or interest. "Non-performing"
securities are highly speculative. For a discussion of Moody's and S&P  ratings,
see the Appendix.
 
The  prices and yields  of lower rated securities  generally fluctuate more than
higher quality securities, and such prices may decline significantly in  periods
of  general economic difficulty or rising  interest rates. Advisers reserves the
right to adopt a defensive approach by temporarily investing up to 100% of  High
Yield  Series' assets in investment grade  debt securities and commercial paper,
and/or in obligations of banks or the United States government.
 
In considering  investments for  High  Yield Series,  Advisers will  attempt  to
identify  high-yielding securities of issuer companies whose financial condition
has improved or is  expected to improve  in the future.  Advisers will not  rely
exclusively  on ratings  assigned by  Moody's and S&P  in this  process, but, in
appropriate  circumstances,  may  perform  its  own  credit  analysis  as  well.
Advisers' analysis focuses on relative values, based on such factors as interest
or dividend coverage, asset coverage, earnings prospects, and the experience and
managerial strength of the issuer companies.
 
Because  High Yield Series  invests primarily in securities  in the lower rating
categories, investors  should carefully  consider their  ability to  assume  the
risks involved before making an investment in the High Yield Series.
 
For  a discussion  of payment-in-kind debentures  ("PIKs"), in  which High Yield
Series may invest, see "Investment Policies, Restrictions, and Risks  Applicable
to More Than One Series."
 
   
The table below shows the weighted average percentages of the High Yield Series'
long-term  bond  investments during  the fiscal  year  ended December  31, 1997,
represented by (1)  bonds rated  by a nationally  recognized statistical  rating
organization,  separated into each rating category, and (2) all unrated bonds as
a group.
    
 
   
<TABLE>
<CAPTION>
STANDARD & POOR'S RATING                             PERCENT OF TOTAL
(OR EQUIVALENT)                                        INVESTMENTS
- --------------------------------------------------  ------------------
<S>                                                 <C>
AAA...............................................           %
AA................................................           %
A.................................................           %
BBB...............................................           %
BB................................................           %
B.................................................           %
CCC...............................................           %
CC................................................           %
C.................................................           %
D.................................................           %
All unrated bonds as a group......................           %
                                                        -----
                                                        100.0%
                                                        -----
                                                        -----
</TABLE>
    
 
For an explaination of investment quality  ratings assigned by Moody's and  S&P,
see the Appendix.
 
RISKS  OF  TRANSACTIONS  IN  HIGH-YIELDING  SECURITIES.  Participation  in high-
yielding securities transactions generally involves greater returns in the  form
of  higher average yields. However,  participation in such transactions involves
greater risks, often related to sensitivity to interest rates, economic changes,
solvency, and relative liquidity in the secondary trading market.
 
The high  yielding securities  market is  still relatively  new and  its  recent
growth paralleled a long period of economic expansion and an increase in merger,
acquisition,  and  leveraged  buyout  activity.  High  yielding  securities  are
especially subject to adverse changes in general economic conditions, to changes
in the  financial  condition of  their  issuers,  and to  price  fluctuation  in
response  to changes in  interest rates. During periods  of economic downturn or
rising interest  rates,  issuers  of high  yielding  securities  may  experience
financial  stress that could adversely affect  their ability to make payments of
principal and interest and increase the possibility of default.
 
Yields on high yield  securities will fluctuate over  time. The prices of  high-
yielding  securities  have been  found  to be  less  sensitive to  interest rate
changes than higher-rated  investments, but more  sensitive to adverse  economic
changes  or individual corporate developments. Also, during an economic downturn
or substantial  period of  rising interest  rates highly  leveraged issuers  may
experience financial stress which would adversely
 
                                       11
<PAGE>
affect   their  ability  to   service  their  principal   and  interest  payment
obligations,  to  meet  projected  business  goals,  and  to  obtain  additional
financing. If the issuer of a security held by High Yield Series defaulted, High
Yield  Series  may  incur additional  expenses  to seek  recovery.  In addition,
periods of  economic  uncertainty and  changes  can  be expected  to  result  in
increased  volatility of market prices of  high-yielding securities and the High
Yield Series'  net  asset  value.  Furthermore, in  the  case  of  high-yielding
securities  structured as zero coupon or  PIKs, their market prices are affected
to a  greater extent  by  interest rate  changes and  thereby  tend to  be  more
volatile than securities which pay interest periodically and in cash.
 
High-yielding  securities  present  risks  based  on  payment  expectations. For
example, high-yielding securities may contain redemption or call provisions.  If
an  issuer exercises these  provisions in a declining  interest rate market, the
High Yield  Series would  have to  replace the  security with  a  lower-yielding
security,   resulting  in  a  decreased  return  for  investors.  Conversely,  a
high-yielding security's value will decrease  in a rising interest rate  market,
as  will the  value of  such Series'  assets. If  High Yield  Series experiences
unexpected net  redemptions,  this  may  force  it  to  sell  its  high-yielding
securities,  without regard to  their investment merits,  thereby decreasing the
asset base upon which such Series' expenses can be spread and possibly  reducing
the rate of return.
 
To  the extent that there is no  established secondary market, there may be thin
trading of high-yielding securities.  This may adversely  affect the ability  of
Fortis  Series' Board of Directors  to accurately value high-yielding securities
and the High  Yield Series' assets  and the  Series' ability to  dispose of  the
securities.  Securities valuation  becomes more  difficult and  judgment plays a
greater role  in  valuation  because  there is  less  reliable,  objective  data
available.  Adverse publicity and investor perceptions,  whether or not based on
fundamental analysis, may  decrease the  values and  liquidity of  high-yielding
securities,  especially  in  a  thinly  traded  market.  Illiquid  or restricted
high-yielding securities  purchased by  High Yield  Series may  involve  special
registration   responsibilities,  liabilities  and   costs,  and  liquidity  and
valuation difficulties.
 
   
Certain risks  are associated  with  applying credit  ratings  as a  method  for
evaluating  high-yielding securities.  For example, credit  ratings evaluate the
safety of  principal and  interest  payments, not  market  value risk  of  high-
yielding  securities. Since credit rating agencies may fail to timely change the
credit ratings to reflect subsequent events, Advisers continuously monitors  the
issuers  of high-yielding securities  held by High Yield  Series to determine if
the issuers  will  have  sufficient  cash flow  and  profits  to  meet  required
principal and interest payments, and to assure the securities' liquidity so High
Yield  Series can  meet redemption requests.  The achievement  of the investment
objective of High Yield Series may  be more dependent upon Advisers' own  credit
analysis  than is the case for higher quality bonds. Also, High Yield Series may
retain a  portfolio security  whose  rating has  been  changed if  the  security
otherwise meets the Series' investment objectives and investment criteria.
    
 
GLOBAL ASSET ALLOCATION SERIES
 
The  objective of the Global Asset Allocation  Series is maximum total return on
invested capital, to be derived  primarily from capital appreciation,  dividends
and   interest,  by  following   a  flexible  asset   allocation  strategy  that
contemplates increased ownership of equity securities during periods when  stock
market  conditions  appear  favorable,  and  increased  ownership  of  short and
long-term fixed-income securities  during periods when  stock market  conditions
are  less favorable. To achieve  this goal, the composition  of the Global Asset
Allocation Series will  vary with  prevailing economic  conditions. The  Series'
neutral  allocation is  approximately 60%  in equity  securities (including debt
securities  convertible  into  equity  securities)  and  approximately  40%   in
fixed-income  securities  (including  money  market  securities).  Under  normal
conditions, either allocation may increase to  75% or decrease to 25%,  although
the  Series is permitted  to be invested  100% in either  equity or fixed-income
securities.
 
   
EQUITY INVESTMENTS.  The approach  of the  Series' sub-adviser,  Morgan  Stanley
Asset  Management  Limited ("Morgan  Stanley") is  oriented to  individual stock
selection and  is value  driven.  In selecting  stocks  for the  Series,  Morgan
Stanley  initially identifies those stocks that it believes to be undervalued in
relation to the  issuer's assets,  cash flow,  earnings and  revenues, and  then
evaluates  the future value of such stocks by applying a dividend discount model
to the  information obtained  from  its in-depth  study  of the  issuer.  Morgan
Stanley utilizes the research of a number of sources, including its affiliate in
Geneva,  Switzerland, Morgan Stanley Capital International, and applies a number
of proprietary screening criteria to identify those securities that it  believes
to  be  undervalued.  The  holdings  are  regularly  reviewed  and  subjected to
fundamental analysis to  determine whether  they continue to  conform to  Morgan
Stanley's  value  criteria.  Securities that  no  longer conform  to  such value
criteria are sold.
    
 
Morgan Stanley  intends  to invest  in  the  common stocks  of  issuers  located
throughout  the world, including issuers  based in the United  States as well as
emerging markets. Common stocks for this purpose include securities  convertible
into  common stocks and securities having  common stock characteristics, such as
rights and warrants  to purchase common  stocks. The Series  may also invest  in
American  Depositary Receipts,  European Depositary  Receipts or  other types of
depositary  receipts.  See   "Investment  Policies,   Restrictions,  and   Risks
Applicable  to  More  Than  One  Series--  Depositary  Receipts."  Securities in
emerging markets may not be as liquid as those in developed markets and may pose
greater risks.  For a  description of  the risks  associated with  investing  in
foreign  securities see "Investment Policies, Restrictions, and Risks Applicable
to More Than  One Series--  Investment in Foreign  Securities." Although  Morgan
Stanley  intends to invest primarily in securities listed on stock exchanges, it
will also invest in securities traded in over-the-counter markets.
 
FIXED-INCOME  INVESTMENTS.  Fixed-income   investments  include  United   States
government    securities,   foreign   government   securities,   securities   of
supranational entities, Eurobonds  and corporate bonds  with varying  maturities
denominated  in various currencies and money market instruments. See "Investment
Policies, Restrictions, and Risks Applicable to More Than One Series--Short Term
Money Market Instruments." In evaluating fixed-income securities, Morgan Stanley
evaluates the currency, market and  individual features of the securities  being
considered  for  investment. The  Series seeks  to  minimize investment  risk by
investing in fixed-income  securities rated  A or better  by S&P  or Moody's  or
comparably rated by another nationally recognized rating agency, or, if unrated,
are determined to be of comparable quality by Morgan Stanley.
 
Investment  in  foreign  government  securities  will  be  limited  to  those of
developed nations that Morgan Stanley  believes pose limited credit risk.  These
countries  currently  include  Australia,  Austria,  Belgium,  Canada,  Denmark,
Finland, France, Germany,  Ireland, Italy, Japan,  Luxembourg, the  Netherlands,
New Zealand, Norway, Spain, Sweden, Switzerland and the United Kingdom.
 
   
ASSET ALLOCATION SERIES
    
 
   
The objective of the Asset Allocation Series is maximum total return on invested
capital,  to  be derived  primarily  from capital  appreciation,  dividends, and
interest, by following  a flexible asset  allocation strategy that  contemplates
increased  ownership  of  equity  securities during  periods  when  stock market
conditions appear favorable, and increased ownership of short and long-term debt
instruments during periods when stock  market conditions are less favorable.  To
achieve this goal, the composition of the Asset Allocation Series will vary with
prevailing economic conditions and
    
 
                                       12
<PAGE>
   
may consist of any of the types of investments in which the Money Market Series,
U.S.  Government Securities Series, Diversified  Income Series, and Growth Stock
Series are permitted to invest.
    
 
   
Depending upon prevailing economic and  market conditions, the Asset  Allocation
Series  may  at  any given  time  be  primarily comprised  of  equity securities
(including debt securities convertible into equity securities), short-term money
market securities, investment grade bonds and  other debt securities, or of  any
combination thereof.
    
 
   
As noted above, the Asset Allocation Series may invest in investment grade bonds
or  other debt securities. Debt securities  in which the Asset Allocation Series
may invest  include  the  investment  grade  and  lower-rated  bonds  (sometimes
referred  to as "junk  bonds") in which  the Diversified Income  Series and High
Yield Series may invest.  For risks connected with  such investments, see  "High
Yield Series--Risks of Transactions in High-Yielding Securities."
    
 
   
Asset Allocation Series may invest up to 20% of its total assets (at the time of
investment)  in foreign securities (provided that no  more than 15% of its total
assets may be  invested in foreign  securities that are  not traded on  national
foreign  securities  exchanges or  traded in  the  United States).  Investing in
foreign securities may result in greater risk than that incurred in investing in
domestic securities. For a discussion of certain considerations of investing  in
foreign securities, see "Investment Policies, Restrictions, and Risks Applicable
to More Than One Series--Investment in Foreign Securities."
    
 
   
Unlike  shareholders of the other Series,  a shareholder of the Asset Allocation
Series confers substantially  more investment discretion  on Advisers,  enabling
Advisers to invest in a wider variety of investment securities.
    
 
   
The  table below shows the weighted  average percentages of the Asset Allocation
Series' long-term bond  investments during  the fiscal year  ended December  31,
1997,  represented by  (1) bonds  rated by  a nationally  recognized statistical
rating organization, separated into  each rating category,  and (2) all  unrated
bonds as a group.
    
 
   
<TABLE>
<CAPTION>
STANDARD & POOR'S RATING                             PERCENT OF TOTAL
(OR EQUIVALENT)                                        INVESTMENTS
- --------------------------------------------------  ------------------
<S>                                                 <C>
AAA...............................................           %
AA................................................           %
A.................................................           %
BBB...............................................           %
BB................................................           %
B.................................................           %
CCC...............................................           %
CC................................................           %
C.................................................           %
D.................................................           %
All unrated bonds as a group......................           %
                                                        -----
                                                        100.0%
                                                        -----
                                                        -----
</TABLE>
    
 
   
For  an explanation of  investment quality ratings assigned  by Moody's and S&P,
see the Appendix.
    
 
VALUE SERIES
 
The Value Series' primary  investment objective is  short and long-term  capital
appreciation.  Current income is only a  secondary objective. The Series invests
primarily  in  equity  securities  and  selects  stocks  based  on  the  "value"
philosophy.
 
In  seeking  to  attain  its  investment  objective,  Value  Series  will invest
primarily in  common  stocks  or  securities  convertible  into  common  stocks.
Occasionally,  however,  limited  amounts  may be  invested  in  other  types of
securities (such as  nonconvertible preferred and  debt securities). In  periods
when  a more defensive position is deemed  warranted, Value Series may invest in
high grade preferred stocks, bonds and other fixed income securities (whether or
not convertible into  or carrying  rights to  purchase common  stock) or  retain
cash,  all without limitation. Value Series  may invest in repurchase agreements
and in both listed and unlisted securities.
 
Value Series may  also invest  up to 10%  of its  total assets (at  the time  of
investment) in foreign securities. Investing in foreign securities may result in
greater  risk  than that  incurred in  investing in  domestic securities.  For a
discussion of certain other investment  practices and techniques of the  Series,
see  "Investment Policies,  Restrictions and Risks  Applicable to  More Than One
Series."
 
GROWTH & INCOME SERIES
 
The investment objectives of Growth & Income Series are capital appreciation and
current income. It  seeks to achieve  this objective by  investing primarily  in
equity securities that provide an income component and the potential for growth.
Growth  & Income Series will pursue its  investment objectives by investing in a
broadly diversified portfolio of securities,  with an emphasis on securities  of
companies  that have a history of  dividend payments. Companies will be selected
on the basis  of their  prospects for  long-term growth  and continued  dividend
payments.
 
In  seeking  to attain  its investment  objective, Growth  & Income  Series will
invest primarily in common stocks or securities convertible into common  stocks.
Occasionally,  however,  limited  amounts  may be  invested  in  other  types of
securities (such as  nonconvertible preferred and  debt securities). In  periods
when  a more defensive position is deemed  warranted, Growth & Income Series may
invest in high grade preferred stocks, bonds, and other fixed income  securities
(whether or not convertible into or carrying rights to purchase common stock) or
retain  cash,  all without  limitation.  Growth &  Income  Series may  invest in
repurchase agreements and in both listed and unlisted securities.
 
Growth & Income Series  may also invest up  to 10% of its  total assets (at  the
time  of investment) in foreign securities.  Investing in foreign securities may
result in greater risk than that  incurred in investing in domestic  securities.
For  a discussion of  certain considerations of  investing in foreign securities
see "Investment Policies, Restrictions,  and Risks Applicable  to More Than  One
Series--Investment in Foreign Securities."
 
S&P 500 INDEX SERIES
 
The  Series'  investment  objective is  to  replicate  the total  return  of the
Standard & Poor's 500 Composite  Stock Price Index (the  "S&P 500 Index" or  the
"Index") primarily through investments in equity securities.
 
The  Series  is  not  managed  according  to  traditional  methods  of  "active"
investment management, which involve the buying and selling of securities  based
upon  economic, financial and market  analysis and investment judgment. Instead,
the Series utilizes a "passive" investment approach, attempting to duplicate the
investment performance of the S&P 500 Index through statistical procedures.
 
   
The S&P 500 Index is composed of 500 common stocks that are selected by Standard
& Poor's  Rating  Services,  a  division  of  The  McGraw-Hill  Companies,  Inc.
("Standard  &  Poor's")  to  capture  the  best  price  performance  of  a large
cross-section of the  U. S. publicly  traded stock market.  The 500  securities,
most  of  which  trade  on  the  New  York  Stock  Exchange  ("NYSE"), represent
approximately  75%   of  the   market   value  of   all  U.S.   common   stocks.
    
 
                                       13
<PAGE>
Each  stock in the S&P 500 Index  is weighted by its market capitalization. That
is, each security is weighted  by its total market  value relative to the  total
market  value of all the  securities in the Index.  Component stocks included in
the S&P 500 Index  are chosen with  the aim of achieving  a distribution at  the
index  level representative of the  various components of the  U. S. economy and
therefore do not represent the 500 largest companies. Aggregate market value and
trading activity are also considered in the selection process.
 
The Index Series expects  to invest in all  500 stocks in the  S&P 500 Index  in
proportion  to their weighting in the Index. To  the extent that the size of the
Index Series does not permit  it to invest in all  500 stocks in the Index,  the
Index  Series will purchase a representative sample of stocks from each industry
sector included in the Index in  proportion to that industry's weighting in  the
Index.
 
   
To  the extent that the  Series seeks to replicate the  S&P 500 Index using such
sampling techniques, a close correlation between the Series' performance and the
performance of the Index is anticipated in both rising and falling markets.  The
Series  attempts  to  achieve  a  correlation  between  the  performance  of its
investments and  that  of  the Index  of  at  least 0.95,  before  deduction  of
expenses.  A  correlation of  1.00 would  represent perfect  correlation between
Series and Index  performance. It  is anticipated  that the  correlation of  the
Series' performance to that of the Index will increase as the size of the Series
increases. The Series' ability to achieve significant correlation between Series
and  Index performance may be affected by changes in securities markets, changes
in the composition of the Index and  the timing of purchases and redemptions  of
Series  shares. Advisers and  the sub-adviser, The  Dreyfus Corporation, monitor
this correlation and  report periodically to  the Board of  Directors of  Fortis
Series.  Should the Series fail to  achieve an appropriate level of correlation,
the Board will consider alternative arrangements.
    
 
Under normal circumstances, the Series invests at least 95% of its total  assets
in  the common stocks included in the  S&P 500 Index. To maintain liquidity, the
Series may invest  up to 5%  of its  assets in the  following instruments:  U.S.
Government  securities,  commercial paper,  bank  certificates of  deposit, bank
demand and time deposits, repurchase agreements, reverse repurchase  agreements,
when-issued transactions and variable amount master demand notes. The Series may
enter  into  futures contracts  and  options to  a  limited extent.  For further
information on  these instruments  and  investment techniques,  see  "Investment
Policies,  Restrictions and Risks Applicable to More Than One Series," below and
the Statement of Additional Information.
 
Standard  &  Poor's-Registered  Trademark-,  "S&P-Registered  Trademark-,"  "S&P
500-Registered Trademark-," "Standard & Poor's 500," and "500" are trademarks of
McGraw-Hill, Inc. and have been licensed for use by Fortis Series. The Series is
not  sponsored, endorsed, sold or  promoted by Standard &  Poor's and Standard &
Poor's makes no representation  regarding the advisability  of investing in  the
Series.  Standard  &  Poor's makes  no  representation or  warranty,  express or
implied, to the owners of the Series  or any member of the public regarding  the
advisability  of investing in securities generally or in the Series particularly
or the ability of the S&P 500  Index to track general stock market  performance.
Standard & Poor's only relationship to Fortis Series is the licensing of certain
trademarks  and trade names of Standard & Poor's  and of the S&P 500 Index which
is determined, composed and  calculated by Standard &  Poor's without regard  to
Fortis  Series or the  Series. Standard &  Poor's has no  obligation to take the
needs of  Fortis  Series or  the  owners of  the  Series into  consideration  in
determining,  composing or calculating  the S&P 500 Index.  Standard & Poor's is
not responsible for and has not participated in the determination of the  prices
and  amount of the Series or the timing of the issuance or sale of the Series or
in the determination or calculation of the equation by which the Series is to be
converted into  cash.  Standard &  Poor's  has  no obligation  or  liability  in
connection with the administration, marketing or trading of the Series.
 
STANDARD & POOR'S DOES NOT GUARANTEE THE ACCURACY AND/OR THE COMPLETENESS OF THE
S&P  500 INDEX OR ANY DATA INCLUDED THEREIN  AND STANDARD & POOR'S SHALL HAVE NO
LIABILITY FOR ANY ERRORS, OMISSIONS, OR INTERRUPTIONS THEREIN. STANDARD & POOR'S
MAKES NO WARRANTY,  EXPRESS OR  IMPLIED, AS  TO RESULTS  TO BE  OBTAINED BY  THE
SERIES,  OWNERS OF THE SERIES OR ANY OTHER  PERSON OR ENTITY FROM THE USE OF THE
S&P 500 INDEX OR ANY DATA INCLUDED  THEREIN. STANDARD & POOR'S MAKES NO  EXPRESS
OR IMPLIED WARRANTIES, AND EXPRESSLY DISCLAIMS ALL WARRANTIES OF MERCHANTABILITY
OR  FITNESS FOR A PARTICULAR PURPOSE OR USE WITH RESPECT TO THE S&P 500 INDEX OR
ANY DATA INCLUDED THEREIN.  WITHOUT LIMITING ANY OF  THE FOREGOING, IN NO  EVENT
SHALL  STANDARD & POOR'S HAVE ANY LIABILITY FOR ANY SPECIAL, PUNITIVE, INDIRECT,
OR CONSEQUENTIAL  DAMAGES (INCLUDING  LOST  PROFITS), EVEN  IF NOTIFIED  OF  THE
POSSIBILITY OF SUCH DAMAGES.
 
BLUE CHIP STOCK SERIES
 
The  Series'  primary investment  objective is  to  provide long-term  growth of
capital. Current income is a secondary objective, and many of the stocks in  the
Series' portfolio are expected to pay dividends.
 
The  Series will  invest at least  65% of total  assets in the  common stocks of
large and medium-sized  blue chip companies,  as defined by  T. Rowe Price,  the
sub-adviser  to the  Series. These companies  will be well  established in their
industries and have the potential for above-average growth in earnings.
 
Most of the assets will be invested  in U.S. common stocks. However, the  Series
may  also purchase other  types of securities,  for example, foreign securities,
preferred stocks, convertible  stocks and bonds,  and warrants, when  considered
consistent  with the Series'  investment objectives and  program. The Series may
also engage in a variety of investment management practices, such as buying  and
selling  futures and  options. Investments in  convertible securities, preferred
stocks and debt securities are limited to 25% of total assets.
 
STOCK SELECTION. In applying  a "blue chip" investment  approach, T. Rowe  Price
analysts  evaluate the growth prospects of companies and the industries in which
they operate.  This approach  seeks  to identify  companies with  strong  market
franchises  in industries that  appear to be  strategically poised for long-term
growth. Its  investment  approach  reflects  T. Rowe  Price's  belief  that  the
combination  of solid company  fundamentals (with emphasis  on the potential for
above-average growth in earnings) along with a positive outlook for the  overall
industry  will  ultimately reward  investors with  a  higher stock  price. While
primary emphasis  is placed  on a  company's prospects  for future  growth,  the
Series  will  not purchase  securities  that, in  T.  Rowe Price's  opinion, are
overvalued considering the underlying business  fundamentals. In the search  for
substantial  capital  appreciation,  the Series  looks  for  stocks attractively
priced relative to their anticipated long-term value.
 
The Series will generally take  the following into consideration when  selecting
stocks:
 
  - LEADING   MARKET  POSITIONS.   Blue  chip   companies  often   have  leading
    market positions that are expected to  be maintained or enhanced over  time.
    Strong   positions,  particularly   in  growing   industries,  can   give  a
 
                                       14
<PAGE>
    company pricing flexibility as  well as the potential  for good unit  sales.
    These factors, in turn, can lead to higher earnings growth and greater share
    price appreciation.
 
  - SEASONED    MANAGEMENT   TEAMS.    Seasoned   management    teams   with   a
    track record of  providing superior  financial results are  important for  a
    company's long-term growth prospects. T. Rowe Price's analysts will evaluate
    the depth and breadth of a company's management experience.
 
  - STRONG FINANCIAL FUNDAMENTALS. Companies should demonstrate
    faster  earnings growth  than their competitors  and the  market in general;
    high profit margins  relative to  competitors; strong cash  flow; a  healthy
    balance  sheet with relatively low debt; and  a high return on equity with a
    comparatively low dividend payout ratio.
 
TYPES OF PORTFOLIO SECURITIES. In seeking to meet its investment objective,  the
Series  may  invest in  any type  of security  or instrument  (including certain
potentially  high  risk  derivatives)   whose  investment  characteristics   are
consistent  with the  Series' investment  program. These  and some  of the other
investment techniques the Series may use are described below.
 
  - PREFERRED  STOCKS.  While  most  preferred   stocks  pay  a  dividend,   the
    Series  may purchase preferred stock where the  issuer has omitted, or is in
    danger of omitting, payment of its dividend. Such investments would be  made
    primarily for their capital appreciation potential.
 
  - FOREIGN   SECURITIES.  The  Series  may  invest  up  to  20%  of  its  total
    assets  (excluding   reserves)   in  foreign   securities.   These   include
    nondollar-denominated   securities   traded   outside   of   the   U.S.  and
    dollar-denominated securities  traded  in  the  U.S.  (such  as  ADRs).  See
    "Investment  Policies, Restrictions  and Risks  Applicable to  More Than One
    Series--Investment  in  Foreign  Securities."  The  Series  may  invest   in
    securities  from  emerging markets,  which have  greater risks  than foreign
    securities in  general. See  "Investment Policies,  Restrictions, and  Risks
    Applicable to More Than One Series--Emerging Markets."
 
  - FIXED-INCOME  SECURITIES.  The  Series  may  invest  in  debt  securities of
    any type  without regard  to quality  or rating.  Such securities  would  be
    purchased in companies which meet the investment criteria for the Series.
 
   
    However,  the Series will not purchase  a non-investment grade debt security
    (junk bond) if immediately  after such purchase the  Series would have  more
    than  5%  of  its total  assets  invested  in such  securities.  For further
    information on  "high  yield" (junk)  bonds,  including the  risks  of  such
    investments, see "Investment Objectives and Policies--High Yield Series."
    
 
  - HYBRID   INSTRUMENTS.  These  instruments  (a   type  of  potentially  high-
    risk derivative) can combine the characteristics of securities, futures  and
    options.  For example, the principal  amount, redemption or conversion terms
    of a  security could  be related  to  the market  price of  some  commodity,
    currency  or  securities index.  Such securities  may  bear interest  or pay
    dividends at below market (or even relatively nominal) rates. Under  certain
    conditions,  the redemption value  of such an investment  could be zero. The
    Series may invest up to 10% of its total assets in hybrid instruments.
 
The Series may employ the following types of management practices:
 
  - CASH POSITION.  The Series  will hold  a certain  portion of  its assets  in
    U.S.  and  foreign  dollar-denominated  money  market  securities, including
    repurchase agreements, in the two highest rating categories, maturing in one
    year or  less. For  temporary,  defensive purposes,  the Series  may  invest
    without  limitation  in  such  securities.  This  reserve  position provides
    flexibility  in  meeting  redemptions,  expenses,  and  the  timing  of  new
    investments,  and serves as  a short-term defense  during periods of unusual
    market volatility.
 
  - FUTURES  AND   OPTIONS.  The   Series   may  buy   and  sell   futures   and
    options  contracts  for  any number  of  reasons, including:  to  manage its
    exposure to  changes in  securities  prices and  foreign currencies;  as  an
    efficient  means of  adjusting its overall  exposure to  certain markets; to
    enhance income; and to protect the value of portfolio securities. The Series
    may purchase, sell or  write call and put  options on securities,  financial
    indices, and foreign currencies. The Series will not invest more than 10% of
    its  total  assets in  derivative instruments  on  securities, call  and put
    options, and  futures  contracts.  See "Futures  Contracts  and  Options  on
    Futures  Contracts" and  "Options" under  the caption  "Investment Policies,
    Restrictions, and Risks Applicable to More Than One Series."
 
  - OPERATING  POLICIES.   Futures:  Initial   margin  deposits   and   premiums
    on  options used for non-hedging purposes will not equal more than 5% of the
    Series' net  assets.  Options  on  securities: The  total  market  value  of
    securities  against which the Series has written call or put options may not
    exceed 25% of its total assets. The  Series will not commit more than 5%  of
    its total assets to premiums when purchasing call or put options.
 
  - MANAGING   FOREIGN   CURRENCY   RISK.   Investors   in   foreign  securities
    may "hedge" their  exposure to potentially  unfavorable currency changes  by
    purchasing  a contract to  exchange one currency for  another on some future
    date at  a  specified exchange  rate.  In certain  circumstances,  a  "proxy
    currency"  may be  substituted for the  currency in which  the investment is
    denominated, a strategy known as "proxy hedging." Although foreign  currency
    transactions   will  be  used  primarily  to  protect  the  Series'  foreign
    securities from  adverse currency  movements relative  to the  dollar,  they
    involve  the risk that anticipated currency movements will not occur and the
    Series' total  return  could  be  reduced.  See  "Foreign  Currency  Forward
    Exchange  Contracts" and "Options  on Foreign Currencies"  under the caption
    "Investment Policies, Restrictions,  and Risks Applicable  to More Than  One
    Series."
 
   
INTERNATIONAL STOCK SERIES
    
 
   
The  investment  objective  of International  Stock  Series is  to  seek capital
appreciation by  investing  primarily in  the  equity securities  of  non-United
States  companies (I.E., incorporated  or organized outside  the United States).
International Stock Series expects  to invest its  assets principally in  common
stocks  of  non-United  States  companies,  although  it  may  have  substantial
investments  in  American   Depositary  Receipts   (see  "Investment   Policies,
Restrictions,  and  Risks  Applicable  to  More  Than  One  Series--  Depositary
Receipts") and in convertible bonds  and other convertible securities. There  is
no  requirement, however, that the International Stock Series invest exclusively
in common stocks or other equity securities, and it may invest up to 20% of  the
value of its total assets in fixed-income securities and short-term money market
instruments.  See "Investment  Policies, Restrictions,  and Risks  Applicable to
More Than One Series-- Short-Term Money Market Instruments." International Stock
Series' fixed-income investments will be limited  to those rated A or better  by
S&P  or  Moody's or  comparably rated  by  another nationally  recognized rating
agency, or, if  unrated, determined  by the Series'  sub-adviser, Lazard  Freres
Asset  Management  ("Lazard  Freres"),  to be  of  comparable  quality.  See the
Appendix attached  hereto  for a  description  of the  ratings  of  fixed-income
securities.
    
 
   
It  is  the present  intention of  Lazard Freres  to invest  International Stock
Series' assets in companies based in Continental Europe, the United Kingdom, the
Pacific  Basin   and   in   such   other   areas   and   countries   as   Lazard
    
 
                                       15
<PAGE>
   
Freres  may determine  from time  to time.  Under normal  market conditions, the
Series will invest at least  65% of its total  assets in equity securities.  The
percentage   of  International  Stock  Series'  assets  invested  in  particular
geographic sectors may shift from time  to time in accordance with the  judgment
of  Lazard Freres. For a  description of the risks  associated with investing in
foreign securities see "Investment Policies, Restrictions, and Risks  Applicable
to More Than One Series--Investment in Foreign Securities."
    
 
   
In  selecting investments  for the Series,  Lazard Freres  attempts to ascertain
inexpensive  securities  world-wide  through  traditional  measures  of   value,
including  low  price  to  earnings  ratio,  high  yield,  unrecognized  assets,
potential for management change and/or  the potential to improve  profitability.
In  addition, Lazard  Freres seeks  to identify  companies that  it believes are
financially productive and undervalued in  those markets. Lazard Freres  focuses
on   individual  stock  selection  (a   "bottom-up"  approach)  rather  than  on
forecasting stock market trends (a "top-down" approach).
    
 
   
Lazard Freres recognizes that some of  the best opportunities are in  securities
not  generally followed by investment  professionals. Thus, Lazard Freres relies
on its research capability  and also maintains a  dialogue with foreign  brokers
and  with the management of foreign companies in an effort to gather the type of
"local knowledge" that it believes is critical to successful investment  abroad.
To  this end,  Lazard Freres  communicates with Lazard  Freres &  Cie. in Paris,
Lazard Brothers & Co. Ltd. in London  and Lazard Japan Asset Management K.K.  in
Tokyo  (independent but affiliated entities)  for information concerning current
business trends, as  well as  for a better  understanding of  the management  of
local  businesses. The information supplied by these affiliates of Lazard Freres
will be  limited  to  statistical  and  factual  information,  advice  regarding
economic  factors and trends or advice as to occasional transactions in specific
securities.
    
 
   
When, in  the  judgment  of  Lazard Freres,  business  or  financial  conditions
warrant,  the  International  Stock  Series  may  assume  a  temporary defensive
position and invest without limit in the equity securities of U.S. companies  or
short-term  money market instruments or hold its assets in cash. See "Investment
Policies, Restrictions, and Risks Applicable to More Than One Series--Short-Term
Money Market  Instruments."  During  those intervals  when  International  Stock
Series  has  assumed a  temporary  defensive position,  the  Series will  not be
pursuing its investment objective.
    
 
   
MID CAP STOCK SERIES
    
 
   
Mid  Cap  Stock  Series  seeks  total  investment  returns  (including   capital
appreciation  and income) that consistently outperform the Standard & Poor's 400
MidCap Index ("S&P MidCap").
    
 
   
The Series attempts to maintain a diversified holding in common stocks of medium
capitalization companies that have  a market value between  $200 million and  $5
billion.  The Series' sub-adviser, The Dreyfus Corporation ("Dreyfus"), believes
that many medium-sized companies are in fast-growing industries, offer  superior
earnings  growth potential  and are characterized  by strong  balance sheets and
high returns on equity. Mid Cap Stock Series may also hold investments in  large
and  small  capitalization  companies, including  emerging  and  cyclical growth
companies.
    
 
   
Common stocks are  selected by the  sub-adviser so that,  in the aggregate,  the
investment  characteristics and risk profile of Mid Cap Stock Series are similar
to  that  of  the  S&P  MidCap.  While  it  may  maintain  aggregate  investment
characteristics  similar to the S&P MidCap, the Series seeks to invest in common
stocks of companies that, in the  aggregate, will provide a higher total  return
than the S&P MidCap. The Series is not an index fund and its investments are not
limited to securities of issuers included in the S&P MidCap.
    
 
   
Dreyfus  utilizes computer techniques to track  and, if possible, outperform the
S&P MidCap. Dreyfus employs valuation models designed to identify common  stocks
of companies that are undervalued in order to construct a portfolio that, in the
aggregate,  resembles the S&P MidCap but is  weighted toward the stocks that the
sub-adviser believes are most attractive.
    
 
   
Under normal circumstances,  at least 65%  of the Series'  total assets will  be
invested in common stocks. The Series may also invest in: (1) obligations issued
or  guaranteed as to interest and principal by the U.S. government, its agencies
and instrumentalities;  (2) instruments  of U.S.  and foreign  banks,  including
certificates of deposit, banker's acceptances and time deposits, and may include
Eurodollar   certificates  of  deposit,  Yankee   certificates  of  deposit  and
Eurodollar time  deposits;  (3) corporate  obligations  rated at  least  Baa  by
Moody's  or BBB by  S&P or, if  unrated, of comparable  quality as determined by
Dreyfus; (4) Eurodollar  bonds and  notes; (5) securities  of foreign  companies
evidenced  by  American  Depository  Receipts;  (6)  repurchase  agreements; (7)
when-issued transactions; and (8) commercial paper. The Series may also  utilize
securities lending and reverse repurchase agreements, and may enter into options
and futures contracts for hedging purposes, subject to certain limitations.
    
 
   
The  S&P MidCap is composed  of 400 domestic common  stocks chosen by Standard &
Poor's for market  size, liquidity and  industry group representation.  It is  a
market-weighted  index (stock price  times shares outstanding),  with each stock
affecting the S&P MidCap in proportion to  its market value. The inclusion of  a
stock  in the S&P  MidCap does not  imply that S&P  believes the stock  to be an
attractive or appropriate investment, nor is S&P in any way affiliated with  the
Series.  The S&P  MidCap was created  by S&P  to capture the  performance of the
stocks that fall in the  medium capitalization range. The medium  capitalization
range  of stocks was defined, at the original time of screening, as between $200
million and $5 billion in market value. Any medium-capitalization stocks already
included in the S&P 500 were excluded  from candidacy for the S&P MidCap.  After
removal  of the 500 stocks,  the S&P MidCap candidate  population was reduced to
1,200 stocks. S&P then subjected this smaller population to a variety of screens
and eventually the sample size was reduced to the final 400 stocks. S&P screened
the  candidacy  population  using  the  following  criteria:  level  of  trading
activity,  or liquidity;  market value;  industry group  representation; and the
level of  controlling interest.  A  limited percentage  of  the S&P  MidCap  may
include  Canadian  securities.  No  other foreign  securities  are  eligible for
inclusion.
    
 
   
The Series  may  purchase  and sell  various  financial  instruments,  including
financial  futures contracts (such as index futures contracts) and options (such
as options on U.S. or foreign  securities or indices of such securities).  These
instruments  may be  used, for example,  to preserve  a return or  spread, or to
facilitate or substitute  for the sale  or purchase of  securities. The  Series'
ability to use these instruments may be limited by market conditions, regulatory
limits  and tax  considerations. See "Futures  Contracts and  Options on Futures
Contracts" and "Options" under  the caption "Investment Policies,  Restrictions,
and  Risks Applicable to More Than One  Series." The Series may not purchase put
or call  options that  are traded  on a  national stock  exchange in  an  amount
exceeding 5% of its net assets.
    
 
   
The  Series will  not knowingly  invest more than  15% of  the value  of its net
assets in illiquid securities, including time deposits and repurchase agreements
having maturities  longer than  seven  (7) days.  Securities that  have  readily
available  market  quotations  are  not deemed  illiquid  for  purposes  of this
limitation (irrespective of  any legal or  contractual restrictions on  resale).
See the Statement of Additional Information for further discussion of restricted
or illiquid securities.
    
 
                                       16
<PAGE>
   
SMALL CAP VALUE SERIES
    
 
   
The objective of Small Cap Value Series is capital appreciation. Small Cap Value
Series  may be appropriate for investors  willing to make a long-term investment
commitment that involves above-average risk. The sub-adviser of Small Cap  Value
Series  is Berger  Associates, Inc.  ("Berger Associates")  which has contracted
with Perkins, Wolf, McDonnell  & Company (the  "Manager") to provide  day-to-day
investment management for the Series.
    
 
   
Small  Cap Value Series seeks to achieve its objective by investing primarily in
common stocks of small companies that are out of favor with markets or that have
not yet been discovered  by the broader investment  community and are  therefore
believed to be undervalued. The Manager generally looks for companies with:
    
 
   
        - A  low price relative to their  assets, earnings, cash flow or
          business franchise
    
 
   
        - Products and services that give them a competitive advantage
    
 
   
        - Quality balance sheets and strong management.
    
 
   
Small Cap Value Series  primarily invests in common  stocks of small  companies,
both  domestic and foreign,  and other securities with  equity features, such as
convertible securities,  preferred stocks,  warrants  and rights.  Under  normal
circumstances,  Small Cap Value Series will invest at least 65% of its assets in
equity securities  of  companies with  market  capitalization of  less  than  $1
billion  at the  time of initial  purchase. Market capitalization  is defined as
total current market value of a  company's outstanding common stock. The  Series
may  also invest  in common stocks  of companies with  market capitalizations in
excess of $1  billion, equity  securities other than  common stocks,  government
securities,  short-term investments or other  securities described below, if the
Manager believes these are likely to be  best suited to achieve Small Cap  Value
Series'  objective. In  addition, Small Cap  Value Series may  invest in certain
securities with unique risks, such as special situations and foreign securities.
    
 
   
Small Cap Value Series' net asset value may be more volatile than that of  funds
primarily  invested in  stocks of larger  companies. Smaller  companies may pose
greater risk  due to  narrow product  lines, limited  financial resources,  less
depth  in management or a limited trading  market for their stocks. However, the
Manager's philosophy is to weigh  a security's downside risk before  considering
its upside potential, which may help provide an element of capital preservation.
Small  Cap Value  Series' investments  are often  focused in  a small  number of
business sectors.
    
 
   
Small Cap Value Series may increase its investment in government securities  and
other  short-term,  interest-bearing  securities  without  limitation  when  the
Manager believes  market  conditions  warrant a  temporary  defensive  position,
during  which period  it may  be more  difficult for  Small Cap  Value Series to
achieve its investment objective.
    
 
   
SPECIAL SITUATIONS. Small  Cap Value  Series may invest  in special  situations,
that  is, in common  stocks of companies  that have recently  experienced or are
anticipated  to  experience  a  significant  change  in  structure,  management,
products  or  services.  Examples  of  special  situations  are  companies being
reorganized or merged,  companies having  unusual new products,  or which  enjoy
particular tax advantages, or companies that are run by new management or may be
probable  takeover candidates. The opportunity  to invest in special situations,
however, is limited  and depends  in part on  the market's  assessment of  these
issuers  and their  circumstances. In addition,  stocks of  companies in special
situations may be  more volatile,  since the market  value of  these stocks  may
decline if an anticipated event or benefit does not materialize.
    
 
   
UNSEASONED  ISSUERS.  Small  Cap  Value  Series  may  invest  in  securities  of
unseasoned issuers. Unseasoned issuers are companies with a record of less  than
three  years' continuous operation, including the operations of any predecessors
and parents.  Investment decisions  for  these securities  may place  a  greater
emphasis  on current or planned product  lines and the reputation and experience
of the company's management and  less emphasis on fundamental valuation  factors
than  would be  the case  for more  mature growth  companies. In  addition, many
unseasoned issuers  may be  small  companies and  involve  the risks  and  price
volatility associated with smaller companies.
    
 
   
FOREIGN  SECURITIES.  Small Cap  Value Series  may invest  in both  domestic and
foreign  securities.  The  Series  will  consider  the  political  and  economic
conditions  in a country, the prospect for  changes in the value of its currency
and the  liquidity of  an investment  in that  country's securities  markets  in
selecting   investments  in   foreign  securities.   See  "Investment  Policies,
Restrictions and Risks Applicable to More Than One Series."
    
 
   
HEDGING TRANSACTIONS. Small Cap Value Series  is authorized to make limited  use
of  certain types of put and call options,  but only for the purpose of hedging,
that is, protecting  against the  risk of  market movements  that may  adversely
affect  the value of the Series' securities  or the price of securities that the
Series is  considering  purchasing.  Although a  hedging  transaction  may,  for
example,  partially  protect  the  Series  from a  decline  in  the  value  of a
particular security  or its  portfolio  generally, hedging  may also  limit  the
Series'  opportunity to profit  from favorable price movements,  and the cost of
the transaction  will  reduce  the  potential return  on  the  security  or  the
portfolio.  No more than 5% of Small Cap Value Series' net assets at the time of
purchase may be utilized as premiums for options.
    
 
   
Small Cap  Value Series  may write  call options  (that is,  issue options  that
obligate  Small Cap Value  Series to deliver  if the option  is exercised by the
holder) that are "covered" and only up to 10% of the Series' net assets. A  call
option  is considered "covered" if the Series already owns the security on which
the option is  written, or, in  the case of  an option written  on a  securities
index,  if  the  Series  owns  a  portfolio  of  securities  believed  likely to
substantially replicate  movement of  the  index. Additional  detail  concerning
options  and the  risks of such  transactions can  be found in  the Statement of
Additional Information.
    
 
   
GLOBAL GROWTH SERIES
    
 
   
The primary investment objective  of Global Growth  Series is long-term  capital
appreciation.  Current income through the receipt  of income such as interest or
dividends from investments is a secondary objective. Global Growth Series  seeks
its   objectives  primarily  by  investing  in  a  global  portfolio  of  equity
securities, allocated  among  diverse  international  markets.  This  Series  is
designed   for  investors  who  wish  to  accept  the  risks  entailed  in  such
investments,  which  are  different  from  those  associated  with  a  portfolio
consisting  entirely of U.S. securities. See "Investment Policies, Restrictions,
and Risks Applicable to More Than One Series--Investment in Foreign Securities."
    
 
   
The Series is not required to maintain any particular geographic or currency mix
of its investments, nor is it required to maintain any particular proportion  of
stocks,  bonds, or other  securities in its  portfolio. However, in  view of its
investment objectives,  the  Series  currently  expects  to  invest  its  assets
primarily  in common  stocks of U.S.  and non-U.S. issuers.  Under normal market
conditions Global Growth Series invests  approximately 55% to 65% (exclusive  of
collateral  in connection with securities lending) of its total assets in equity
securities in  established growth  companies  which have  achieved a  record  of
operating  earnings over the past five-year period. Such companies would usually
be located in the United States,  Canada, the United Kingdom, Japan,  Australia,
and  other Western European nations. These companies will also have paid or have
the ability to pay a dividend. Established growth companies typically have  less
sensitivity  to general economic trends, tend  to generate above average returns
on invested
    
 
                                       17
<PAGE>
capital, and  have leadership  positions in  their respective  industries.  When
selecting  securities of non-U.S. issuers, Advisers considers additional factors
related to  the  country of  the  non-U.S. issuer,  including  foreign  currency
exchange,  the  political  stability of  the  country of  such  non-U.S. issuer,
foreign  regulations,  and  settlement  practices.  See  "Investment   Policies,
Restrictions,  and  Risks  Applicable  to More  Than  One  Series--Investment in
Foreign Securities."
 
   
Global Growth Series may invest up to  45% of its equity securities in U.S.  and
non-U.S.  emerging  growth  companies  and in  global  emerging  markets.  For a
discussion of  emerging  growth  companies  and  global  emerging  markets,  see
"Aggressive  Growth Series"  and "Investment  Policies, Restrictions,  and Risks
Applicable to  More Than  One  Series--Emerging Markets,"  respectively.  Global
Growth Series has no minimum size requirements for the emerging growth companies
in which it will invest. Advisers believes that investments in equity securities
in   emerging  growth  companies  and  in  global  emerging  markets  offer  the
opportunity for significant long-term investment returns. The Series may  invest
in  any kind of  equity security including common  stocks, preferred stocks, and
warrants. The above investments involve certain risks. See "Investment Policies,
Restrictions, and  Risks  Applicable  to More  Than  One  Series--Investment  in
Foreign Securities."
    
 
For  investment purposes,  an issuer is  typically considered as  domiciled in a
particular country if  it is  incorporated under the  laws of  that country,  at
least 50% of the value of its assets are located in that country, and it derives
at least 50% of its income from operations or sales in that country. For issuers
which  do not meet this criteria, Advisers will consider where an issuer has its
principal activities  and interests,  taking into  account such  factors as  the
location  of the issuer's assets, personnel,  sales, and earnings in determining
the country of an issuer.
 
   
Global  Growth  Series  may,  however,  invest  substantially  or  primarily  in
investment  grade debt  securities of U.S.  and non-U.S. issuers  when the total
return available from  investments in such  securities may equal  or exceed  the
total  return available  from investments in  equity securities.  The Series may
invest up to substantially all of its assets in high quality debt securities  of
U.S.  and  non-U.S.  issuers  when  the Series  is  temporarily  in  a defensive
position. High quality debt  securities are securities rated  within one of  the
two  highest ratings categories of Moody's (Aaa and  Aa) or of S&P (AAA and AA),
or comparably  rated by  another  nationally recognized  rating agency,  or,  if
unrated,  determined  to be  of comparable  quality by  Advisers. To  enable the
Series to respond to general economic  changes and market conditions around  the
world,  Global Growth Series is authorized to invest up to 100% of its assets in
either equity securities or in debt securities.
    
 
   
The debt  obligations  in which  the  Series may  invest  include a  variety  of
government bonds and corporate debt obligations. Government bonds the Series may
purchase  include debt obligations issued or  guaranteed by the United States or
foreign governments (including foreign states, provinces, or municipalities)  or
their  agencies,  authorities, or  instrumentalities and  also may  include debt
obligations issued by  supranational entities, which  entities are organized  or
supported  by several national governments, such as the World Bank and the Asian
Development Bank.  Other  debt  obligations  held  by  the  Series  may  include
corporate  bonds of U.S.  and non-U.S. issuers  and debt obligations convertible
into equity securities or having attached warrants or rights to purchase  equity
securities.  The  Series may  also purchase  securities that  are issued  by the
government  or  a  corporation  or  financial  institution  of  one  nation  but
denominated  in  the currency  of another  nation  (or a  multinational currency
unit).
    
 
   
Global Growth Series expects that a  large portion of its debt investments  will
be  "high quality" (as defined above)  government or corporate bonds. The Series
may retain  a  portfolio security  whose  rating  has changed  if  the  security
otherwise  meets  the  Series' investment  objectives  and  investment criteria,
provided that no more  than 5% of the  Series' net assets may  be invested in  a
debt  security rated lower than Baa or BBB. A description of the Moody's and S&P
ratings is included in the Appendix.
    
 
   
Global Growth  Series  may  hold  cash (U.S.  dollars,  foreign  currencies,  or
multinational  currency units) and/or invest any portion or all of its assets in
high quality money market instruments as temporary defensive strategies, pending
investment of proceeds from new sales of Global Growth Series shares or to  meet
ordinary daily cash needs.
    
 
   
For temporary defensive reasons, such as during times of international political
or  economic uncertainty, most or all of  the Series' investments may be made in
the United States and denominated in U.S. dollars.
    
 
   
The Series  may also  use forward  currency contracts  and options  and  futures
strategies  which involve  certain investment  risks and  transaction costs. See
"Investment Policies,  Restrictions,  and  Risks Applicable  to  More  Than  One
Series."
    
 
   
LARGE CAP GROWTH SERIES
    
 
   
The  investment  objective of  Large Cap  Growth Series  is long-term  growth of
capital. The  Large  Cap  Growth  Series invests  predominantly  in  the  equity
securities of a limited number of large, carefully selected, high-quality United
States  companies that  are judged likely  to achieve  superior earnings growth.
Normally, about 40  companies will be  represented in Large  Cap Growth  Series'
portfolio,  with  the  25  most  highly  regarded  of  these  companies  usually
constituting approximately  70% of  the  Series' net  assets. Large  Cap  Growth
Series  is thus  atypical from most  equity funds  in its focus  on a relatively
small number  of intensively  researched  companies and  is designed  for  those
seeking  to  accumulate  capital  over  time  with  less  volatility  than  that
associated with investment in smaller companies.
    
 
   
As a matter of fundamental policy, the  Series normally invests at least 85%  of
its  total assets in the equity securities of United States companies. These are
companies (i) organized under United States law that have their principal office
in the  United  States, and  (ii)  the equity  securities  of which  are  traded
principally in the United States.
    
 
   
The  sub-adviser to Large Cap Growth  Series is Alliance Capital Management L.P.
("Alliance"). Alliance's  investment strategy  for the  Series emphasizes  stock
selection  and  investment in  the securities  of a  limited number  of issuers.
Alliance relies heavily upon the fundamental analysis and research of its  large
internal staff, which generally follows a primary research universe of more than
600   companies  that  have  strong  management,  superior  industry  positions,
excellent balance sheets and superior earnings growth prospects. An emphasis  is
placed  on identifying  companies whose substantially  above average prospective
earnings growth is not fully reflected in current market valuations.
    
 
   
In managing Large Cap Growth Series, Alliance seeks to utilize market volatility
judiciously (assuming no change in company fundamentals), striving to capitalize
on apparently  unwarranted  price fluctuations,  both  to purchase  or  increase
positions  on weakness  and to  sell or  reduce overpriced  holdings. The Series
normally will  be nearly  fully  invested and  will  not take  significant  cash
positions  for market timing  purposes. During market  declines, while adding to
positions in favored  stocks, the  Series may become  somewhat more  aggressive,
gradually  reducing  the  number  of  companies  represented  in  its portfolio.
Conversely, in  rising  markets,  while reducing  or  eliminating  fully  valued
positions,  Large  Cap  Growth  Series may  become  somewhat  more conservative,
gradually increasing  the  number of  companies  represented in  its  portfolio.
Alliance  thus seeks  to gain positive  returns in good  markets while providing
some measure of protection in poor markets.
    
 
                                       18
<PAGE>
   
Alliance expects the average market  capitalization of companies represented  in
the  Series' portfolio normally to be in the range, or in excess, of the average
market capitalization of companies comprising the S&P 500.
    
 
   
Large Cap Growth  Series may also:  (i) invest up  to 20% of  its net assets  in
convertible  securities  of  companies  whose  common  stocks  are  eligible for
purchase by it; (ii) invest  up to 5% of its  net assets in rights or  warrants;
(iii)  invest up  to 15% of  its total  assets in securities  of foreign issuers
whose common stocks  are eligible  for purchase by  it; (iv)  purchase and  sell
exchange-traded  index options and stock index  futures contracts; and (v) write
covered exchange-traded call options on common  stocks, unless as a result,  the
amount  of its securities subject to call  options would exceed 15% of its total
assets, and purchase  and sell exchange-traded  call and put  options on  common
stocks  written by others, but the total cost  of all options held by the Series
(including exchange-traded  index  options) may  not  exceed 10%  of  its  total
assets. For additional information on the use, risks and costs of these policies
and  practices see "Investment  Policies, Restrictions, and  Risks Applicable to
More Than One Series" and "General  Risks to Consider." Large Cap Growth  Series
will not write put options.
    
 
   
GROWTH STOCK SERIES
    
 
   
The  primary investment objective of Growth  Stock Series is short and long-term
capital  appreciation.  Current  income  through  the  receipt  of  interest  or
dividends  from investments will  merely be incidental to  the efforts of Growth
Stock Series  in  pursuing  its  primary objective.  Growth  Stock  Series  will
generally invest in companies representing a diversified cross section of United
States industry. This includes large and small companies and new and established
companies.
    
 
   
Growth  Stock  Series  will  invest primarily  in  common  stocks  or securities
convertible into common  stocks. Occasionally, however,  limited amounts may  be
invested in other types of securities (such as nonconvertible preferred and debt
securities).  In periods  when a  more defensive  position is  deemed warranted,
Growth Stock Series may invest in  high grade preferred stocks, bonds and  other
fixed  income securities (whether or not  convertible into or carrying rights to
purchase common  stock) or  retain cash,  all without  limitation. Growth  Stock
Series  may  also invest  in: repurchase  agreements,  both listed  and unlisted
securities, and up to  10% of its  total assets (at the  time of investment)  in
foreign securities.
    
 
   
Investing in foreign securities may result in greater risk than that incurred in
investing  in domestic securities. For a discussion of certain considerations of
investing in  foreign securities  see  "Investment Policies,  Restrictions,  and
Risks Applicable to More Than One Series--Investment in Foreign Securities."
    
 
AGGRESSIVE GROWTH SERIES
 
   
The  investment  objective  of  Aggressive Growth  Series  is  maximum long-term
capital appreciation by investing  primarily in equity  securities of small  and
medium  sized companies that are early in  their life cycles, but which have the
potential to become major enterprises ("emerging growth companies"), and of more
established companies that have the potential for above-average capital  growth.
Dividend  and  interest income  from securities,  if any,  is incidental  to the
Series' investment objective.
    
 
Aggressive Growth Series' policy  is to invest,  under normal circumstances,  at
least 65% of its total assets in: (a) common stocks of emerging growth companies
and  (b) equity  securities of  some more  established companies  whose rates of
earnings growth are expected  to accelerate because of  special factors such  as
new  products,  changes  in  consumer  demand,  basic  changes  in  the economic
environment, or rejuvenated management. Emerging growth companies generally have
annual gross revenues ranging from $10 million to $1 billion, would be  expected
to  show earnings  growth over time  that is well  above the growth  rate of the
overall economy and the rate of inflation, and would have products,  management,
and  market  opportunities which  are usually  necessary  to become  more widely
recognized as growth companies.
 
   
While Aggressive Growth Series will invest  primarily in common stocks, it  may,
to  a limited  extent, seek  appreciation in other  types of  securities such as
convertible securities and  warrants when  relative values  make such  purchases
appear  attractive  either as  individual issues  or as  types of  securities in
certain economic  environments.  The Series  may  also write  covered  call  and
secured  put options and purchase  call and put options  on securities and stock
indexes in an effort to increase total return and for hedging purposes, and  may
purchase  and sell stock index futures contracts and options thereon for hedging
purposes. (See "Investment Policies, Restrictions, and Risks Applicable to  More
Than One Series--Options, Futures, and Currency Strategies.")
    
 
The  nature of investing in emerging growth companies involves greater risk than
is customarily  associated  with  investments  in  more  established  companies.
Emerging  growth companies may have limited product lines, markets, or financial
resources, and  they  may  be  dependent on  a  limited  management  group.  The
securities  of emerging growth  companies may have  limited market stability and
may be subject  to more abrupt  or erratic market  movements than securities  of
larger,  more established companies or the market averages in general. Shares of
Aggressive Growth Series, therefore, are subject to greater fluctuation in value
than shares of  a conservative equity  fund or  of a growth  fund which  invests
entirely in more established growth stocks.
 
Aggressive  Growth Series may also invest up to  10% of its total assets (at the
time of investment) in foreign  securities. Investing in foreign securities  may
result  in greater risk than that  incurred in investing in domestic securities.
For a discussion of certain  considerations of investing in foreign  securities,
see  "Investment Policies, Restrictions,  and Risks Applicable  to More Than One
Series--Investment in Foreign Securities."
 
   
As set forth above, Aggressive Growth Series, under normal economic  conditions,
will  be  principally  invested  in equity  securities.  However,  when Advisers
considers a more  defensive posture  appropriate, the  Aggressive Growth  Series
temporarily  can be 100%  invested in commercial paper,  obligations of banks or
the  United  States   Government  and  other   high  quality,  short-term   debt
instruments.
    
 
INVESTMENT POLICIES, RESTRICTIONS, AND RISKS APPLICABLE TO MORE THAN ONE SERIES
 
EMERGING  MARKETS. Subject to  the restrictions set forth  above, each of Global
Bond Series, Global Asset Allocation  Series and International Stock Series  may
invest without limitation in emerging market countries. Global Growth Series may
invest  up to 45%  of its equity  securities in emerging  market countries. High
Yield Series  may invest  up  to 10%  of its  total  assets in  emerging  market
countries.  Many emerging market  countries have experienced  substantial or, in
some periods, extremely high  rates of inflation for  many years. Inflation  and
rapid  fluctuations in inflation rates have had and may continue to have adverse
effects on the economies and securities  markets of certain of these  countries.
In an attempt to control inflation, wage and price controls have been imposed in
certain  countries.  In  many cases,  emerging  market countries  are  among the
world's largest debtors to commercial banks, foreign governments,  international
financial  organizations and other financial  institutions. In recent years, the
governments  of  some  of  these  countries  have  encountered  difficulties  in
servicing  their external debt obligations, which has led to defaults on certain
obligations and the restructuring of certain indebtedness.
 
                                       19
<PAGE>
As used  in  this Prospectus,  emerging  markets are  countries  categorized  as
emerging  markets by the  International Financial Corporation,  the World Bank's
private sector  division. Such  countries may  include but  are not  limited  to
Singapore,  Indonesia, China, India and certain Latin American countries such as
Mexico, Argentina,  Chile  and Brazil.  Such  markets tend  to  be in  the  less
economically developed regions of the world. General characteristics of emerging
market  countries  also include  lower degrees  of  political stability,  a high
demand for capital  investment, a high  dependence on export  markets for  their
major  industries, a need  to develop basic  economic infrastructures, and rapid
economic growth.
 
   
FOREIGN CURRENCY  FORWARD EXCHANGE  CONTRACTS. Global  Bond Series,  High  Yield
Series,  Global Asset Allocation  Series, Value Series,  Growth & Income Series,
Blue Chip Stock Series, International Stock Series, Mid Cap Stock Series, Global
Growth Series and Aggressive Growth Series may purchase or sell foreign currency
forward exchange contracts ("forward contracts") to attempt to minimize the risk
from adverse changes in the relationship between the various currencies in which
each Series invests. A forward contract is  an obligation to purchase or sell  a
specific  currency  for  an agreed  price  at  a future  date.  The  contract is
individually negotiated  and  privately traded  by  currency traders  and  their
customers.  Each Series may enter into a  forward contract, for example, when it
enters into a contract for the purchase  or sale of a security denominated in  a
foreign  currency in order to "lock in"  the price of the security ("transaction
hedge") in a particular  currency. Additionally, when a  Series believes that  a
foreign  currency (for example, the British  pound) may suffer a decline against
any other currency or currencies in  the Series (for example, the U.S.  dollar),
it  may enter  into a  forward sale contract  to sell  an amount  of the foreign
currency expected to decline (the British pound) that approximates the value  of
some  or all  of the Series'  investment securities denominated  in such foreign
currency (the British  pound) (a "position  hedge"). In such  cases, the  Series
also  may enter into  a forward sale contract  to sell a  foreign currency for a
fixed amount in another currency (other  than the U.S. dollar) where the  Series
believes  that the value of the currency to be sold pursuant to the forward sale
contract will fall  whenever there is  a decline  in the value  of the  currency
(other than the U.S. dollar) in which certain portfolio securities of the Series
are denominated (a "cross-hedge").
    
 
Under  certain conditions, Securities and Exchange Commission (the "Commission")
guidelines require investment companies to set  aside cash or any security  that
is  not  considered restricted  or  illiquid in  a  segregated account  to cover
forward contracts. As required by Commission guidelines, any Series that has the
ability to enter into a forward contract for an essentially speculative  purpose
will,  upon entering  into such  a transaction,  segregate assets  to cover such
forward contracts.  At the  present time,  only the  Global Bond,  Global  Asset
Allocation  and International  Stock Series  may enter  into speculative forward
contracts. A  speculative forward  contract  is one  which, unlike  the  hedging
situations  defined above, does not have an underlying position in a security or
securities. The  Series will  not segregate  assets to  cover forward  contracts
entered into for hedging purposes.
 
Although  forward contracts will  be used primarily to  protect such Series from
adverse currency movements, they also involve the risk that anticipated currency
movements will not be accurately predicted.
 
   
FUTURES CONTRACTS  AND OPTIONS  ON  FUTURES CONTRACTS.  Certain of  Global  Bond
Series,  High Yield Series, Global Asset Allocation Series, Value Series, Growth
& Income Series,  Blue Chip  Stock Series, Global  Growth Series,  International
Stock  Series, Mid Cap  Stock Series, Small  Cap Value Series,  Large Cap Growth
Series and Aggressive Growth Series may enter into contracts for the purchase or
sale for future delivery of securities  or contracts based on financial  indices
including  any index of U.S. government  securities or corporate debt securities
("futures contracts") and may purchase and write put and call options to buy  or
sell  futures contracts  ("options on  futures contracts").  Global Bond Series,
Global Asset Allocation Series, International Stock Series, Mid Cap Stock Series
and Global Growth Series  may enter into futures  contracts for the purchase  or
sale for future delivery of fixed income securities, and Blue Chip Stock Series,
Small  Cap Value Series,  Global Growth Series  and Large Cap  Growth Series may
enter into futures  contracts for the  purchase or sale  for future delivery  of
equity   securities.  Global  Bond  Series,  High  Yield  Series,  Global  Asset
Allocation Series, Blue Chip Stock Series, International Stock Series and Global
Growth Series may  enter into interest  rate futures contracts  and Global  Bond
Series,  Global Asset Allocation  Series, Value Series,  Blue Chip Stock Series,
International Stock Series, Small Cap Value Series, Growth & Income Series,  S&P
500  Series, Large Cap Growth Series and Aggressive Growth Series may enter into
stock index futures  contracts. Global  Bond Series, High  Yield Series,  Global
Asset Allocation Series, Blue Chip Stock Series, International Stock Series, Mid
Cap  Stock Series, Global  Growth Series and Aggressive  Growth Series may enter
into contracts  for  the  purchase  or  sale  for  future  delivery  of  foreign
currencies.  A  "sale"  of  a  futures  contract  means  the  undertaking  of  a
contractual obligation to  deliver the securities  or foreign currencies  called
for  by the contract at a specified price on a specified date. A "purchase" of a
futures contract means the  undertaking of a  contractual obligation to  acquire
the  securities or foreign currencies called for  by the contract at a specified
price on a  specified date.  The purchaser  of a  futures contract  on an  index
agrees  to take or  make delivery of an  amount of cash  equal to the difference
between a specified dollar multiple of the value of the index on the  expiration
date  of the  contract ("current  contract value")  and the  price at  which the
contract was  originally  struck.  No  physical  delivery  of  the  fixed-income
securities  underlying the  index is  made. At  the time  a futures  contract is
purchased or  sold, a  Series must  allocate  cash or  securities as  a  deposit
payment  based on a percentage of a  contract's face value. The futures contract
is valued  daily  thereafter  and  the Series  may  be  required  to  contribute
additional cash or securities that reflects any decline in the contract's value.
These  investment techniques will  be used for a  variety of purposes, including
hedging against  anticipated future  changes in  interest rates  that  otherwise
might  either adversely affect the value of the portfolio securities of a Series
or adversely affect the prices of securities or foreign currencies that a Series
intends to purchase at a later date.
    
 
   
Global Bond  Series,  Global Asset  Allocation  Series and  International  Stock
Series  may purchase  and write "covered"  put and  call options to  buy or sell
futures contracts.  High Yield  Series, Small  Cap Value  Series, Global  Growth
Series  and Aggressive Growth  Series may write only  "covered" call options. An
option written on  a security  or currency  is "covered"  when, so  long as  the
Series  is  obligated  under the  option,  it  owns the  underlying  security or
currency. High Yield Series,  Small Cap Value Series,  Global Growth Series  and
Aggressive  Growth  Series each  will "cover"  options  on futures  contracts it
writes by  maintaining  in a  segregated  account either  marketable  securities
which, in Advisers' judgment, correlate to the underlying futures contract or an
amount  of cash or  any security that  is not considered  restricted or illiquid
equal in value  to the  amount such  Series would be  required to  pay were  the
option exercised.
    
 
Transactions  in  futures  contracts,  options  on  futures  contracts, currency
contracts and certain options  for hedging purposes  involve certain risks.  See
"General Risks to Consider--Options, Futures, and Currency Strategies."
 
   
OPTIONS.  Options (a type of potentially high risk derivative) give the investor
the right, but not the  obligation, to buy or sell  an asset at a  predetermined
price  in the future.  The Global Bond  Series, High Yield  Series, Global Asset
Allocation Series, Value  Series, Blue  Chip Stock  Series, International  Stock
Series, Large Cap Growth Series, Small Cap Value Series, Growth & Income Series,
Global  Growth Series  and Aggressive Growth  Series may write  call options and
purchase put and call options on equity and debt
    
 
                                       20
<PAGE>
   
securities to hedge against the risk of fluctuations in the prices of securities
held by  such Series  or  which Advisers  (or  the sub-adviser,  if  applicable)
intends  to include in such Series.  Global Bond Series, Global Asset Allocation
Series, Blue Chip Stock Series and International Stock Series may also purchase,
write or sell options on securities or financial indices for other than  hedging
purposes, which involves greater risk.
    
 
   
OPTIONS  ON FOREIGN  CURRENCIES. Global Bond  Series, High  Yield Series, Global
Asset Allocation Series,  Blue Chip  Stock Series,  International Stock  Series,
Global Growth Series and Aggressive Growth Series may purchase and write put and
call  options  on  foreign  currencies for  the  purpose  of  protecting against
declines in the value of  foreign currency denominated portfolio securities  and
against  increases in the cost of such securities to be acquired. As in the case
of other  kinds of  options, however,  the writing  of an  option on  a  foreign
currency  constitutes only  a partial  hedge, up  to the  amount of  the premium
received. A Series could be required  to purchase or sell foreign currencies  at
disadvantageous  exchange rates,  thereby incurring  losses. The  purchase of an
option  on  a  foreign  currency  may  constitute  an  effective  hedge  against
fluctuations  in exchange rates although, in the event of rate movements adverse
to a Series'  position, it may  forfeit the  entire amount of  the premium  plus
related  transaction  costs.  Options on  foreign  currencies to  be  written or
purchased  by  a   Series  are  traded   on  U.S.  and   foreign  exchanges   or
over-the-counter.
    
 
   
LIMITATIONS ON INVESTMENTS IN DERIVATIVE INSTRUMENTS ON SECURITIES, OPTIONS, AND
FUTURES  CONTRACTS.  Global  Bond  Series, Global  Asset  Allocation  Series and
International Stock Series will not enter into any options, futures, or  forward
contract  transactions if immediately thereafter the amount of premiums paid for
all options, initial margin deposits on all futures contracts and/or options  on
futures  contracts, and collateral  deposited with respect  to forward contracts
held by or entered into by such Series would exceed 5% of the value of the total
assets of such Series. This restriction  does not apply to securities  purchased
on  a when-issued,  delayed delivery  or forward  commitment basis  as described
under "Investment Policies, Restrictions, and Risks Applicable to More Than  One
Series--Delayed  Delivery Transactions."  In addition, Global  Bond Series, High
Yield Series,  Global Asset  Allocation Series,  Value Series,  Growth &  Income
Series,  Blue Chip  Stock Series, Aggressive  Growth Series, S&P  500 Series and
International Stock Series will not invest in the aggregate more than 10% of its
total assets in derivative instruments on securities, call and put options,  and
futures contracts.
    
 
   
The  High  Yield Series,  Value Series,  Growth &  Income Series,  Global Growth
Series and Aggressive Growth Series have adopted two percentage restrictions  on
the  use of  options, futures, and  forward contracts. The  first restriction is
that each  such Series  will not  enter into  any options,  futures, or  forward
contract  transactions if immediately thereafter the amount of premiums paid for
all options, initial margin deposits on all futures contracts and/or options  on
futures  contracts, and collateral  deposited with respect  to forward contracts
held by or entered into by the Series would exceed 5% of the value of the  total
assets  of the Series. The second restriction is that the aggregate value of the
Series' assets covering, subject to, or  committed to all options, futures,  and
forward  contracts will not exceed  20% of the value of  the total assets of the
Series. These  two  restrictions do  not  apply  to securities  purchased  on  a
when-issued,  delayed delivery, or  forward commitment basis  as described under
"Delayed Delivery Transactions." However, each such Series intends to limit  its
investment  in futures during the coming year so that the aggregate value of the
Series assets subject to futures  contracts will not exceed  5% of the value  of
its  net assets. In addition, investments in options are further restricted by a
nonfundamental investment restriction  that prohibits the  Global Growth  Series
from  investing more than an  aggregate of 10% of the  value of its total assets
in: (a) restricted securities (both debt and equity) or in equity securities  of
any  issuer which are  not readily marketable; (b)  repurchase agreements with a
maturity of more than  seven days; and (c)  over-the-counter option and  futures
contracts.
    
 
FLOATING  AND VARIABLE  RATE INSTRUMENTS.  Certain of  the obligations  that the
Series may  purchase  have  a  floating  or  variable  rate  of  interest.  Such
obligations  bear interest at rates that are not fixed, but vary with changes in
specified market rates  or indices,  such as the  prime rate,  and at  specified
intervals.  Certain of these  obligations may carry a  demand feature that would
permit the  holder to  tender them  back to  the issuer  at par  value prior  to
maturity.  Each  Series  limits  its purchases  of  floating  and  variable rate
obligations to those of the same quality as it otherwise is allowed to purchase.
Advisers (or the sub-adviser,  if applicable) monitors on  an ongoing basis  the
ability  of an issuer  of a demand  instrument to pay  principal and interest on
demand. A Series' right to obtain payment  at par on a demand instrument can  be
affected  by  events occurring  between the  date such  Series elects  to demand
payment and the date payment is due that may affect the ability of the issuer of
the instrument to  make payment when  due, except when  such demand  instruments
permit  same-day  settlement. To  facilitate  settlement, these  same-day demand
instruments may be  held in book  entry form at  a bank other  than the  Series'
custodian,  subject to a  subcustodian agreement approved  by the Series between
the bank and the Series' custodian.
 
The floating and variable rate obligations that the Series may purchase  include
certificates of participation in obligations purchased from banks. A certificate
of  participation  gives  the Series  an  undivided interest  in  the underlying
obligations in the  proportion that  such Series'  interest bears  to the  total
principal   amount  of  such  obligations.   Certain  of  such  certificates  of
participation may carry a demand feature that would permit the holder to  tender
them back to the issuer prior to maturity.
 
To  the  extent  that  floating and  variable  rate  instruments  without demand
features are not  readily marketable,  they will  be subject  to the  investment
restrictions  pertaining to investments in  illiquid securities. See "Restricted
or Illiquid Securities" below.
 
LETTERS OF  CREDIT. Commercial  paper and  other short-term  obligations may  be
backed  by  irrevocable  letters  of  credit issued  by  banks  that  assume the
obligation for payment of principal and interest  in the event of default by  an
issuer.  Only banks the securities of which,  in the opinion of Advisers (or the
sub-adviser, if  applicable),  are of  investment  quality comparable  to  other
permitted  investments of  such Series may  be used for  letter of credit-backed
investments.
 
   
FOREIGN DIVERSIFICATION. Each of the Global Bond Series, Global Asset Allocation
Series, International  Stock Series,  Mid  Cap Stock  Series and  Global  Growth
Series  invests  its  net assets  in  issues  of not  less  than  five different
countries (four if less than 80%  invested in foreign securities; three if  less
than  60%; two if less  than 40%; and one  if less than 20%).  Issues of any one
country other than  the United States  will represent  no more than  20% of  net
assets, provided that an additional 15% of net assets may be invested in issuers
located in any one of the following countries: Australia, Canada, France, Japan,
the United Kingdom, or Germany.
    
 
REPURCHASE AGREEMENTS. Each of the Series may invest in repurchase agreements.
 
   
RESTRICTED  OR  ILLIQUID  SECURITIES.  A policy  of  Money  Market  Series, U.S.
Government Securities Series, Diversified Income Series, Asset Allocation Series
and Growth Stock Series  which may not  be changed without  the approval of  the
shareholders,  is that each such Series may invest  up to 5% of the value of its
total assets (at the time of investment) in securities
    
 
                                       21
<PAGE>
which  it might not be  free to sell to the  public without registration of such
securities under the Securities  Act of 1933  (excluding Rule 144A  securities).
However,  this policy is further restricted  by a policy--which could be changed
without shareholder approval--which prohibits more  than an aggregate of 10%  of
each  such Series'  assets from being  invested in:  restricted securities (both
debt and equity) or  in equity securities  of any issuer  which are not  readily
marketable.
 
Global  Growth Series may invest up to 10%  of the value of its total assets (at
the time  of  investment) in  securities  which  are not  registered  under  the
applicable  securities laws of  the country in which  such securities are traded
and for which no  alternative market is readily  available (excluding Rule  144A
securities).  This  policy is  restricted  by a  further  policy which  could be
changed without shareholder approval--that prohibits  more than an aggregate  of
10%  of  Global Growth  Series'  assets from  being  invested in  (a) restricted
securities (both debt and  equity) or in equity  securities of any issuer  which
are  not readily marketable,  (b) repurchase agreements with  a maturity of more
than seven days, and (c) over-the-counter option and futures contracts.
 
A policy of  each of the  Global Bond  Series, High Yield  Series, Global  Asset
Allocation  Series, Value Series, Growth &  Income Series, S&P 500 Index Series,
Blue Chip Stock Series, International Stock Series, and Aggressive Growth Series
is that each  Series may invest  up to  15% of its  net assets (at  the time  of
investment)  in all  forms of  illiquid investments,  as determined  pursuant to
applicable Securities and Exchange Commission rules and regulations.
 
   
REAL ESTATE OR REAL ESTATE  INVESTMENT TRUSTS. Diversified Income Series,  Asset
Allocation  Series, Value Series and  Growth & Income Series  may invest in real
estate investment  trusts ("REITs"),  real estate  development and  real  estate
operating  companies and other  real estate related  businesses. Growth & Income
Series and  Value Series  currently intend  to invest  the REIT  portion of  its
portfolio  primarily  in equity  REITs,  which are  trusts  that sell  shares to
investors and use the  proceeds to invest  in real estate  or interests in  real
estate.  A REIT may focus on particular projects, such as apartment complexes or
shopping centers, or geographic regions, such as the Southeastern United States,
or both. Debt REITs invest in obligations secured by mortgages on real  property
or interests in real property.
    
 
Value  Series has also  adopted a nonfundamental  investment restriction that it
may invest  up to  10% of  its total  assets in  Real Estate  Investment  Trusts
(REITs) and will invest only in REITs that are publicly distributed.
 
The  Series' investments in real estate securities  may be subject to certain of
the same risks associated with the direct ownership of real estate. These  risks
include:  declines in  the value  of real estate;  risks related  to general and
local economic conditions; overbuilding  and competition; increases in  property
taxes  and operating  expenses; and  variations in  rental income.  In addition,
REITs may not be diversified. REITs are subject to the possibility of failing to
qualify for tax-free pass-through of income under the Internal Revenue Code  and
failing  to maintain exemption from  the 1940 Act. Also,  REITs may be dependent
upon management skill  and may  be subject to  the risks  of obtaining  adequate
financing for projects on favorable terms.
 
For  further discussion on what real estate related investments may be made by a
Series, see the Statement of Additional Information.
 
BORROWINGS. Each Series may  borrow money from banks  as a temporary measure  to
facilitate redemptions.
 
As  a policy  which may  not be  changed without  shareholder approval, however,
borrowings  by  Money   Market  Series,  U.S.   Government  Securities   Series,
Diversified  Income Series, Asset Allocation Series, and Growth Stock Series may
not exceed 10% of the value of the total assets of each such Series.
 
   
Borrowings by Global  Bond Series,  High Yield Series,  Global Asset  Allocation
Series,  Value Series, Growth &  Income Series, S&P 500  Index Series, Blue Chip
Stock Series, International  Stock Series, Global  Growth Series and  Aggressive
Growth  Series through banks and "roll" transactions  will not exceed 33 1/3% of
the total assets of each such  Series; however, an investment policy  changeable
without  shareholder approval further  restricts borrowings by  each such Series
(except Global Growth Series) to temporary borrowing of 25% of total assets when
necessary to meet redemptions of the  Series. As an operating policy, Blue  Chip
Stock  Series may not transfer as  collateral any portfolio securities except as
necessary in connection  with permissible  borrowings or  investments, and  then
such  transfers may not exceed  25% of such Series'  total assets. An investment
policy changeable without shareholder  approval further restricts Global  Growth
Series'  borrowings  to  10%  of  its  total  assets.  No  additional investment
securities may be purchased by a Series whose outstanding borrowings, (including
"roll" transactions in the case  of the Series in  this paragraph) exceed 5%  of
the  value of such Series' total assets.  If market fluctuations in the value of
the portfolio holdings of  the Series in this  paragraph or other factors  cause
the  ratio of such Series' total assets  to outstanding borrowings to fall below
300%, within three  days (excluding  Sundays and  holidays) of  such event  such
Series  may be required to  sell portfolio securities to  restore the 300% asset
coverage, even  though  from  an  investment  standpoint  such  sales  might  be
disadvantageous.   Interest  paid  on  borrowings  will  not  be  available  for
investment.
    
 
   
ZERO COUPON  OBLIGATIONS. The  U.S.  Government Securities  Series,  Diversified
Income  Series, Global Bond  Series, High Yield  Series, Global Asset Allocation
Series, Asset Allocation  Series, International Stock  Series and Global  Growth
Series  may invest  in zero coupon  obligations of the  government and corporate
issuers, including rights to "stripped"  coupon and principal payments.  Certain
obligations  are "stripped"  of their  coupons, and  the rights  to receive each
coupon payment and the principal payment  are sold as separate securities.  Once
separated,  each coupon as  well as the principal  amount represents a different
single-payment claim due from  the issuer of  the security. Each  single-payment
claim  (coupon or principal) is equivalent to  a zero coupon bond. A zero coupon
security pays no interest to its holder during its life, and its value  consists
of  the difference between its  face value at maturity  (the coupon or principal
amount), if held to maturity, or its market  price on the date of sale, if  sold
prior  to maturity, and its acquisition price (the discounted "present value" of
the payment to be received).
    
 
Certain zero coupon obligations  represent direct obligations  of the issuer  of
the  "stripped" coupon and principal payments. Other zero coupon obligations are
securities issued  by financial  institutions which  constitute a  proportionate
ownership  of an underlying pool of stripped coupon or principal payments. These
Series may  invest in  either type  of zero  coupon obligation.  The  investment
policies  and restrictions applicable to  corporate and government securities in
the Series  shall  apply equally  to  the  Series' investments  in  zero  coupon
securities (including, for example, minimum corporate bond ratings).
 
VARIABLE  AMOUNT MASTER DEMAND NOTES. Each  Series may invest in variable amount
master demand  notes. These  instruments  are short-term,  unsecured  promissory
notes  issued by corporations to finance short-term credit needs. They allow the
investment of  fluctuating amounts  by the  Series at  varying market  rates  of
interest  pursuant  to  arrangements  between the  Series,  as  lender,  and the
borrower. Variable  amount master  demand notes  permit a  series of  short-term
borrowings  under a single note. Both the lender and the borrower have the right
to reduce the amount of outstanding indebtedness at any time. Such notes provide
that the interest
 
                                       22
<PAGE>
rate on the amount outstanding varies on  a daily basis depending upon a  stated
short-term  interest rate barometer. Advisers  will monitor the creditworthiness
of the borrower throughout the  term of the variable  master demand note. It  is
not  generally contemplated that such instruments will be traded and there is no
secondary market for  the notes.  Typically, agreements relating  to such  notes
provide  that the lender shall  not sell or otherwise  transfer the note without
the borrower's  consent. Thus,  variable amount  master demand  notes may  under
certain circumstances be deemed illiquid assets. However, such notes will not be
considered  illiquid where the Series has  a "same day withdrawal option," i.e.,
where it has the unconditional  right to demand and  receive payment in full  of
the  principal amount of  the amount then outstanding  together with interest to
the date of payment.
 
MUNICIPAL SECURITIES.  U.S.  Government Securities  Series,  Diversified  Income
Series,  and Asset Allocation Series each may  invest not more than 20% of their
total assets in municipal securities during periods when such securities  appear
to offer more attractive returns than taxable securities.
 
PAYMENT-IN-KIND  DEBENTURES.  U.S.  Government  Securities  Series,  Diversified
Income Series, Global Bond Series,  High Yield Series, Asset Allocation  Series,
Global  Asset Allocation  Series, and International  Stock Series  may invest in
debentures the interest  on which may  be paid in  other securities rather  than
cash  ("PIKs").  Typically, during  a specified  term  prior to  the debenture's
maturity, the issuer of a  PIK may provide for the  option or the obligation  to
make  interest payments in debentures, common stock, or other instruments (i.e.,
"in kind" rather than in cash). The type of instrument in which interest may  or
will  be paid would be known by Fortis Series at the time of the investment. The
investment restrictions  regarding  corporate  bond quality  are  applicable  to
investments  in  PIKs by  such Series  as well  as to  the securities  which may
constitute interest payments on PIKs.  While PIKs generate income for  generally
accepted  accounting standards purposes, they do not generate cash flow and thus
could cause such Series to be  forced to liquidate securities at an  inopportune
time in order to distribute cash, as required by the Internal Revenue Code.
 
MORTGAGE-RELATED   SECURITIES.  Each  Series   may  invest  in  mortgage-related
securities.  Mortgage-related  securities  are  securities  that,  directly   or
indirectly,  represent a participation  in (or are secured  by and payable from)
mortgage loans on real property.  Mortgage-related securities may represent  the
right to receive both principal and interest payments on underlying mortgages or
may  represent the  right to receive  varying proportions of  such payments. One
type of mortgage-related security includes certificates which represent pools of
mortgage loans  assembled for  sale  to investors  by various  governmental  and
private  organizations. Another type of  mortgage-related security includes debt
securities which are secured, directly or indirectly, by mortgages on commercial
or residential real estate.
 
Investments in mortgage-related securities involve certain risks. In periods  of
declining  interest  rates,  prices of  fixed  income securities  tend  to rise.
However, during such  periods, the  rate of prepayment  of mortgages  underlying
mortgage-related  securities  tends  to  increase,  with  the  result  that such
prepayments must be reinvested  at lower rates. In  addition, the value of  such
securities  may  fluctuate  in  response  to  the  market's  perception  of  the
creditworthiness of  the issuers  of mortgage-related  securities owned  by  the
Series.  The ability  of the issuer  of mortgage-related  securities to reinvest
favorably  in  underlying  mortgages  may  be  limited  by  prevailing  economic
conditions  or by  government regulation.  Additionally, although  mortgages and
mortgage-related securities are generally supported  by some form of  government
or  private  guarantee  and/or insurance,  there  is no  assurance  that private
guarantors or insurers will be able to meet their obligations.
 
   
CMOS AND  MULTI-CLASS PASS-THROUGH  SECURITIES. The  U.S. Government  Securities
Series, Diversified Income Series, Global Bond Series, High Yield Series, Global
Asset Allocation Series, Asset Allocation Series, and International Stock Series
may invest in CMOs. CMOs are debt instruments issued by special purpose entities
which   are  secured  by  pools  of  mortgage  loans  or  other  mortgage-backed
securities.  Multi-class  pass-through  securities  are  interests  in  a  trust
composed  of  mortgage loans  or other  mortgage-backed securities.  Payments of
principal and interest on  underlying collateral provide the  funds to pay  debt
service   on  the  CMO  or  make  scheduled  distributions  on  the  multi-class
pass-through security. Multi-class  pass-through securities,  CMOs, and  classes
thereof (including those discussed below) are examples of the types of financial
instruments commonly referred to as "derivatives."
    
 
In  a CMO, a series of bonds or certificates is issued in multiple classes. Each
class of CMOs, often referred to as a "tranche," is issued at a specified coupon
rate and has a stated maturity or final distribution date. Principal prepayments
on collateral underlying a CMO may cause it to be retired substantially  earlier
than  the stated  maturities or  final distribution  dates. Interest  is paid or
accrues on all classes of a CMO on a monthly, quarterly or semiannual basis. The
principal and interest on  the underlying mortgages may  be allocated among  the
several  classes of  a series  of a  CMO in  many ways.  In a  common structure,
payments of principal,  including any principal  prepayments, on the  underlying
mortgages  are applied according to scheduled cash flow priorities to classes of
the series of a CMO.
 
There are many  classes of  CMOs. There  are IOs,  which entitle  the holder  to
receive  distributions consisting solely or primarily of all or a portion of the
interest in an underlying pool  of mortgage loans or mortgage-backed  securities
("Mortgage  Assets"). There are also "POs",  which entitle the holder to receive
distributions consisting  solely  or  primarily  of all  or  a  portion  of  the
principal  of the  underlying pool  of Mortgage  Assets. In  addition, there are
"inverse floaters", which have a coupon rate that moves in the reverse direction
to an applicable index, and accrual (or "Z") bonds, which are described below.
 
As to IOs, POs, inverse floaters, and accrual bonds, not more than 5% of the net
assets of  each of  the U.S.  Government Securities  Series, Diversified  Income
Series,  Global Bond Series, High Yield  Series, Asset Allocation Series, Global
Asset Allocation Series, and International Stock Series will be invested in  any
of  these items at any  one time and no  more than 10% of  the net assets of the
Series will be invested in all such  obligations at any one time. Not more  than
5% of the Global Growth Series' net assets collectively will be invested in such
obligations at any time.
 
Inverse  floating CMOs are typically more volatile than fixed or adjustable rate
tranches of CMOs. Investments in inverse floating CMOs would be purchased by the
Series to attempt to  protect against a  reduction in the  income earned on  the
Series  investments due  to a  decline in  interest rates.  The Series  would be
adversely affected by the purchase of such  CMOs in the event of an increase  in
interest  rates since  the coupon rate  thereon will decrease  as interest rates
increase, and, like other mortgage-backed securities, the value will decrease as
interest rates increase.
 
The cash flows and yields  on IO and PO classes  are extremely sensitive to  the
rate  of principal payment  (including prepayments) on  the Mortgage Assets. For
example, a rapid or slow rate of principal payments may have a material  adverse
effect  on the yield to maturity of  IOs or POs, respectively. If the underlying
Mortgage Assets experience  greater than anticipated  prepayments of  principal,
the  holder of an IO may incur substantial losses, even if the IO class is rated
AAA. Conversely, if  the underlying  Mortgage Assets experience  is slower  than
anticipated  prepayments of principal, the yield and market value for the holder
of a PO will be affected more severely than would be the case with a traditional
Mortgage Backed Security.
 
                                       23
<PAGE>
However, if interest  rates were  expected to  rise, the  value of  an IO  might
increase  and may partially offset other bond  value declines, and if rates were
expected to fall, the inclusion of POs could balance lower reinvestment rates.
 
An accrual of "Z" bond holder is not entitled to receive cash payments until one
or more other classes  of the CMO have  been paid in full  from payments on  the
mortgage  loans underlying the CMO. During the period in which cash payments are
not being made on the Z tranche, interest  accrues on the Z tranche at a  stated
rate, and this accrued interest is added to the amount of principal which is due
to  the holder of the Z tranche. After the other classes have been paid in full,
cash payments  are  made  on  the  Z  tranche  until  its  principal  (including
previously  accrued interest which  was added to  principal, as described above)
and accrued interest at the stated rate  have been paid in full. Generally,  the
date  upon which cash  payments begin to be  made on a Z  tranche depends on the
rate at which the mortgage loans underlying  the CMO are prepaid, with a  faster
prepayment  rate resulting in an earlier commencement  of cash payments on the Z
tranche. Like a zero coupon bond, during  its accrual period the Z tranche of  a
CMO  has the advantage of eliminating  the risk of reinvesting interest payments
at lower rates during a period of  declining market interest rates. At the  same
time, however, and also like a zero coupon bond, the market value of a Z tranche
can  be expected to fluctuate more widely  with changes in market interest rates
than would the market value of a tranche which pays interest currently.  Changes
in  market interest rates also can be  expected to influence prepayment rates on
the mortgage loans underlying the CMO of which  a Z tranche is a part. As  noted
above,  such changes  in prepayment  rates will  affect the  date at  which cash
payments begin to be made on a Z tranche, and therefore also will influence  its
market value.
 
   
SHORT-TERM  TRADING. Money Market Series,  U.S. Government Securities Series and
Asset Allocation Series intend to use short-term trading of their securities  as
a  means of managing their portfolios to achieve their investment objectives. As
used herein, "short-term trading" means selling securities held for a relatively
brief period of time, usually less than three months. Short-term trading will be
used by the Series primarily in two situations:
    
 
    (a) MARKET DEVELOPMENTS.  A security may  be sold to  avoid depreciation  in
    what  Advisers  anticipates will  be a  market decline  (a rise  in interest
    rates), or a security may be purchased  in anticipation of a market rise  (a
    decline in interest rates) and later sold; and
 
    (b)  YIELD  DISPARITIES. A  security  may be  sold  and another  security of
    comparable quality purchased  at approximately  the same time,  in order  to
    take  advantage of  what Advisers believes  is a temporary  disparity in the
    normal yield relationship between the two securities (a yield disparity).
 
Short-term trading techniques will be used principally in connection with higher
quality, nonconvertible  debt  securities, which  are  often better  suited  for
short-term trading because the market in such securities is generally of greater
depth  and offers greater liquidity than the  market in debt securities of lower
quality.
 
   
Each of  Money  Market  Series,  U.S. Government  Securities  Series  and  Asset
Allocation  Series  will  engage  in  short-term  trading  if  it  believes  the
transactions, net  of  costs (including  commission,  if any),  will  result  in
improving  the  appreciation potential  or income  of its  investment portfolio.
Whether any improvement will be realized by short-term trading will depend  upon
the  ability  of  Advisers  to  evaluate  particular  securities  and anticipate
relevant market factors, including interest rate trends and variations from such
trends. Short-term trading  such as  that contemplated  by the  Series places  a
premium upon the ability of Advisers to obtain relevant information, to evaluate
it promptly, and to take advantage of its evaluations by completing transactions
on  a  favorable  basis. To  qualify  as  a regulated  investment  company under
Subchapter M of the Internal Revenue Code,  less than 30% of each Series'  gross
income (on an annual basis) can be derived from the sale or other disposition of
securities  held  for less  than three  months.  The Series  will not  engage in
short-term trading if it would result in violation of this provision.
    
 
DELAYED DELIVERY TRANSACTIONS. All Series except Money Market Series and  Growth
Stock  Series may  purchase securities  on a  "when-issued" or  delayed delivery
basis and purchase or sell securities on a "forward commitment" basis. When such
transactions are negotiated, the  price is fixed at  the time the commitment  is
made,  but delivery and payment  for the securities take  place at a later date.
Normally, the settlement date  occurs within two  months after the  transaction,
but  delayed settlements beyond  two months may  be negotiated. At  the time the
Series enters into a transaction on a when-issued or forward commitment basis, a
segregated account consisting  of cash or  any security that  is not  considered
restricted  or  illiquid,  equal to  the  value  of the  when-issued  or forward
commitment securities will be established and maintained with the custodian  and
will  be marked to the market daily.  During the period between a commitment and
settlement, no payment is made for the securities and, thus, no interest accrues
to the purchaser from the  transaction. If the Series  disposes of the right  to
acquire a when-issued security prior to its acquisition or disposes of its right
to  deliver or receive against a forward commitment, it can incur a gain or loss
due to  market fluctuation.  The  use of  when-issued transactions  and  forward
commitments  enables the Series to hedge against anticipated changes in interest
rates and prices. The Series may  also enter into such transactions to  generate
incremental  income. In some instances, the third-party seller of when-issued or
forward commitment securities may determine prior to the settlement date that it
will be unable or unwilling to meet its existing transaction commitments without
borrowing securities. If advantageous from a yield perspective, the above Series
may, in that event, agree to  resell its purchase commitment to the  third-party
seller  at the current market  price on the date  of sale and concurrently enter
into another purchase  commitment for  such securities at  a later  date. As  an
inducement for the Series to "roll over" its purchase commitment, the Series may
receive a negotiated fee.
 
The  purchase  of  securities on  a  when-issued, delayed  delivery,  or forward
commitment basis exposes the Series to risk because the securities may  decrease
in  value  prior  to their  delivery.  Purchasing securities  on  a when-issued,
delayed delivery, or forward commitment basis involves the additional risk  that
the  return available in the market when the delivery takes place will be higher
than that  obtained in  the  transaction itself.  These  risks could  result  in
increased  volatility of  the Series'  net asset  value to  the extent  that the
Series purchases  securities  on a  when-issued,  delayed delivery,  or  forward
commitment  basis while remaining substantially fully  invested. There is also a
risk that the securities may not be delivered or that a Series may incur a  loss
or  will  have lost  the opportunity  to invest  the amount  set aside  for such
transaction in the segregated asset account. As to each Series, no more than 20%
of its net assets may be  invested in when-issued, delayed delivery, or  forward
commitment  transactions, and of such  20%, no more than  one-half (i.e., 10% of
its net assets)  may be invested  in when-issued, delayed  delivery, or  forward
commitment  transactions without the intention  of actually acquiring securities
(i.e., dollar rolls).
 
   
SECURITIES  LENDING.  Global  Bond  Series,  High  Yield  Series,  Global  Asset
Allocation  Series, Value Series, Growth &  Income Series, S&P 500 Index Series,
Blue Chip Stock Series, International Stock Series, Mid Cap Stock Series, Global
Growth Series and Aggressive Growth Series are authorized to make loans of their
portfolio securities to broker-dealers or to other institutional investors.  The
borrower  must  maintain with  such Series'  custodian collateral  consisting of
cash, U.S. government  securities, or other  liquid, high-grade debt  securities
equal to at least 100% of the value of the borrowed securities, plus any accrued
interest.  Such Series will  receive any interest paid  on the loaned securities
and a  fee and/or  a portion  of the  interest earned  on the  collateral. As  a
fundamental policy, such Series will
    
 
                                       24
<PAGE>
limit their loans of portfolio securities to an aggregate of 33 1/3% (except for
Global  Growth  Series, with  a 30%  limit) of  the value  of its  total assets,
measured at  the time  any such  loan  is made;  however, an  investment  policy
changeable  without  shareholder  approval  further  restricts  lending  of  its
portfolio securities by each such Series  except Global Growth Series to 10%  of
its total assets.
 
The  risks in lending portfolio securities,  as with other extensions of secured
credit, consist of possible delay in  receiving additional collateral or in  the
recovery  of the securities or possible loss  of rights in the collateral should
the borrower fail financially. Loans will only be made to firms deemed by Fortis
Advisers, Inc. ("Advisers") (or the sub-adviser, if there is one for the Series)
to be of good standing and will not be made unless, in the judgment of  Advisers
(or  the  sub-adviser), the  consideration to  be earned  from such  loans would
justify the risk.
 
SHORT-TERM MONEY MARKET INSTRUMENTS.  Each Series may at  any time invest  funds
awaiting  investment  or  held  as  reserves  for  the  purposes  of  satisfying
redemption requests,  payment  of dividends  or  making other  distributions  to
shareholders,  in cash and short-term money market instruments. Short-term money
market instruments in which each Series  may invest include (i) short-term  U.S.
government   securities   and  short-term   obligations  of   foreign  sovereign
governments and  their agencies  and  instrumentalities, (ii)  interest  bearing
savings  deposits on, and  certificates of deposit  and bankers' acceptances of,
United States  and foreign  banks, (iii)  commercial paper  of U.S.  or  foreign
issuers  rated A-1 or higher by S&P or Prime-1 by Moody's or comparably rated by
another nationally recognized  rating agency,  or, if not  rated, determined  by
Advisers  (or the  sub-adviser, if applicable)  to be of  comparable quality and
(iv) repurchase agreements relating to the foregoing.
 
U.S.  GOVERNMENT  SECURITIES.  Each  Series   may  invest  in  U.S.   government
securities,  which include:  (i) the  following U.S.  Treasury obligations: U.S.
Treasury bills (initial  maturities of one  year or less),  U.S. Treasury  notes
(initial  maturities of  one to  10 years),  and U.S.  Treasury bonds (generally
initial maturities of greater  than 10 years),  all of which  are backed by  the
full  faith and  credit of  the United  States; and  (ii) obligations  issued or
guaranteed  by  U.S.   government  agencies   or  instrumentalities,   including
government  guaranteed mortgage-related securities, some  of which are backed by
the full  faith and  credit  of the  U.S.  Treasury, e.g.,  direct  pass-through
certificates  of the Government National Mortgage Association; some of which are
supported by the right of the issuer  to borrow from the U.S. government,  e.g.,
obligations of Federal Home Loan Banks; and some of which are backed only by the
credit  of the  issuer itself, e.g.,  obligations of the  Student Loan Marketing
Association. U.S. government securities are backed by the full faith and  credit
of  the U.S. government  or guaranteed by the  issuing agency or instrumentality
and, therefore, there is generally considered to  be no risk as to the  issuer's
capacity  to pay interest and repay principal. Nevertheless, due to fluctuations
in interest  rates,  there is  no  guarantee as  to  the market  value  of  U.S.
government securities. See "Investment Objectives and Policies" in the Statement
of  Additional Information  for a further  description of  obligations issued or
guaranteed by U.S. government agencies or instrumentalities.
 
INVESTMENT IN  FOREIGN SECURITIES.  Investing in  securities issued  by  foreign
governments  and corporations  or entities involves  considerations and possible
risks not typically associated with investing in obligations issued by the  U.S.
government  and  domestic corporations.  The values  of foreign  investments are
affected  by  changes  in  currency  rates  or  exchange  control   regulations,
application  of foreign  tax laws, including  withholding taxes,  changes in tax
laws, governmental administration or economic or monetary policy (in the  United
States  or abroad) or  changed circumstances in  dealings between nations. Costs
are incurred  in  connection with  conversions  between various  currencies.  In
addition,  foreign brokerage commissions are generally higher than in the United
States, and foreign  securities markets may  be less liquid,  more volatile  and
less  subject to governmental supervision than in the United States. Investments
in foreign  countries could  be affected  by other  factors not  present in  the
United  States, including seizure, expropriation, confiscatory taxation, risk of
war,  lack  of   uniform  accounting  and   auditing  standards  and   potential
difficulties  in  enforcing contractual  obligations,  and could  be  subject to
extended settlement periods.
 
DEPOSITARY RECEIPTS. The Series which may invest in foreign securities may  hold
equity securities of foreign issuers in the form of American Depositary Receipts
("ADRs"),  European Depositary Receipts ("EDRs") or other securities convertible
into securities of eligible  European or Far  Eastern Issuers. These  securities
may  not necessarily be denominated  in the same currency  as the securities for
which they may be exchanged. ADRs  are receipts typically issued by an  American
bank or trust company that evidence ownership of underlying securities issued by
a  foreign corporation. Generally, ADRs in  registered form are designed for use
in the United States securities markets. For purposes of the Series'  investment
policies,  the  Series'  investments in  ADRs  and  EDRs will  be  deemed  to be
investments in the equity securities representing securities of foreign  issuers
into which they may be converted.
 
PORTFOLIO  TURNOVER. The portfolio  turnover rate for a  Series is calculated by
dividing the  lesser  of  purchases  or  sales  by  such  Series  of  investment
securities  for  the particular  fiscal  year by  the  monthly average  value of
investment  securities  owned  by  the  Series  during  the  same  fiscal  year.
"Investment  securities"  for  purposes  of  this  calculation  do  not  include
securities with  a  maturity date  less  than twelve  months  from the  date  of
investment.  A 100%  portfolio turnover  rate would  occur, for  example, if the
lesser of  the  value of  purchases  or sales  of  investment securities  for  a
particular  year  were equal  to  the average  monthly  value of  the investment
securities owned during  such year.  As set  forth in  the Financial  Highlights
section,  for  the fiscal  year ended  December 31,  1996, the  annual portfolio
turnover rate of several  of the Series  exceeded 100%. This  was the result  of
active  portfolio  management in  recognition  of changing  economic conditions.
While a  higher  turnover  rate  may  result  in  the  Series  incurring  higher
transaction costs, the Series' managers attempt to have such costs outweighed by
the benefits of such transactions, although this cannot be assured.
 
GENERAL CONSIDERATIONS. Any investment restriction or limitation, fundamental or
otherwise,  that involves a maximum percentage of securities or assets shall not
be considered to be violated (except in  the case of the limitation on  illiquid
investments),  unless an excess over the  percentage occurs immediately after an
acquisition of  securities or  utilization of  assets, and  such excess  results
therefrom.
 
After purchase by any Series, a security may cease to be rated or its rating may
be reduced below the minimum required for purchase by such Series. Neither event
will  require a sale of such security by a Series. To the extent the ratings may
change as a result of changes in the rating organizations or the rating systems,
each Series will attempt to use comparable ratings as standards for  investments
in  accordance with the investment policies  contained in this Prospectus and in
the Statement of Additional Information. The ratings of S&P and Moody's are more
fully described in the Appendix attached hereto.
 
The insurance laws  and regulations of  various states as  well as the  Internal
Revenue  Code of 1986 and  regulations thereunder may from  time to time, impose
additional restrictions on the investments of the various Series.
 
                                       25
<PAGE>
GENERAL RISKS TO CONSIDER
 
An investment in any of the Series  involves certain risks in addition to  those
noted  elsewhere in this Prospectus and  the Statement of Additional Information
with respect to particular Series. These include the following:
 
EQUITY SECURITIES GENERALLY. Market prices  of equity securities generally,  and
of  particular companies' equity  securities, frequently are  subject to greater
volatility than  prices of  fixed  income securities.  Market prices  of  equity
securities  as a group  have dropped dramatically  in a short  period of time on
several occasions in the past, and they may  do so again in the future. Each  of
the  Series which may  purchase equity securities (such  as common and preferred
stocks) is subject to the risk of generally adverse equity markets.
 
COMMON AND PREFERRED STOCKS. Stocks represent shares of ownership in a  company.
Generally,  preferred stock has  a specified dividend and  ranks after bonds and
before common stocks in its claim on income for dividend payments and on  assets
should  the  company be  liquidated. After  other  claims are  satisfied, common
stockholders participate in company profits on a pro rata basis; profits may  be
paid  out in dividends or  reinvested in the company  to help it grow. Increases
and decreases in earnings are usually  reflected in a company's stock price,  so
common   stocks  generally  have  the  greatest  appreciation  and  depreciation
potential of all corporate securities.
 
   
SMALLER-CAPITALIZATION COMPANIES. The equity securities of
smaller-capitalization companies may involve  greater risks and volatility  than
the  equity securities  of larger,  more mature companies  due to  some of these
companies potentially having limited product lines, reduced market liquidity for
the trading  of their  shares, limited  financial resources  and less  depth  in
management  than more established companies. Smaller  companies also may be less
significant factors within their industries and may have difficulty withstanding
competition from  larger  companies.  Therefore, the  Small  Cap  Value  Series,
Aggressive  Growth Series and other Series that invest in smaller-capitalization
companies are not  intended as  a complete  or balanced  investment vehicle  but
rather  as an investment for  persons who are in  a financial position to assume
greater risk and share price volatility.  Realizing the full potential of  these
types  of companies frequently takes time. As  a result, Small Cap Value Series,
Aggressive Growth Series and other Series that invest in  smaller-capitalization
companies should be considered as a long-term investment vehicles.
    
 
CONVERTIBLE  SECURITIES  AND  WARRANTS. Certain  Series  may invest  in  debt or
preferred  equity  securities  convertible  into  or  exchangeable  for   equity
securities.   Traditionally,  convertible  securities  have  paid  dividends  or
interest at  rates higher  than  common stocks  but lower  than  non-convertible
securities.  They generally participate  in the appreciation  or depreciation of
the underlying stock into which they are convertible, but to a lesser degree. In
recent years, convertibles  have been  developed which combine  higher or  lower
current  income with options and  other features. Warrants are  options to buy a
stated number of shares of common stock at a specified price any time during the
life of the warrants (generally, two or more years).
 
INTEREST RATE RISK. Interest rate  risk is the risk that  the value of a  fixed-
rate debt security will decline due to changes in market interest rates. Because
the  Series invest in  fixed-rate debt securities, they  are subject to interest
rate risk. In general, when interest rates rise, the value of a fixed-rate  debt
security  declines.  Conversely, when  interest rates  decline,  the value  of a
fixed-rate debt security generally increases.  Thus, shareholders in the  Series
bear  the risk that increases  in market interest rates  will cause the value of
their Series' portfolio investments to decline.
 
In general, the value  of fixed-rate debt securities  with longer maturities  is
more  sensitive  to changes  in market  interest  rates than  the value  of such
securities with shorter maturities. Thus, the net asset value of a Series  which
invests  in  securities  with  longer  weighted  average  maturities  (or longer
durations) should be expected to have greater volatility in periods of  changing
market  interest rates than  that of a  Series which invests  in securities with
shorter weighted average maturities (or  shorter durations). As described  below
under  "General  Risks  to  Consider--Mortgage-Backed  Securities,"  it  is more
difficult to generalize about the effect of changes in market interest rates  on
the values of mortgage-backed securities.
 
Although   Advisers  (or  a  sub-adviser)  may  for  certain  Series  engage  in
transactions intended to hedge the value of a Series' portfolio against  changes
in  market interest rates, there is  no assurance that such hedging transactions
will be undertaken or will fulfill their purpose.
 
CREDIT RISK. Credit risk  is the risk  that the issuer of  a debt security  will
fail  to make payments  on the security  when due. Because  the Series invest in
debt securities, they are subject to credit risk.
 
Securities issued or guaranteed  by the United  States Government generally  are
viewed  as  carrying  minimal  credit risk.  Securities  issued  by governmental
entities but not backed by the full  faith and credit of the United States,  and
securities  issued by private  entities, are subject to  higher levels of credit
risk. The ratings  and certain  other requirements  which apply  to the  Series'
permitted  investments, as described elsewhere  in this Prospectus, are intended
to limit  the amount  of credit  risk undertaken  by the  Series.  Nevertheless,
shareholders  in the Series bear the risk  that payment defaults could cause the
value of their Series' portfolio investments to decline.
 
CALL RISK. Many  corporate bonds may  be redeemed  at the option  of the  issuer
("called") at a specified price prior to their stated maturity date. In general,
it  is advantageous  for a  corporate issuer to  call its  bonds if  they can be
refinanced through the issuance  of new bonds which  bear a lower interest  rate
than  that of the called bonds. Call risk  is the risk that corporate bonds will
be called  during a  period of  declining  market interest  rates so  that  such
refinancings may take place.
 
If  a bond  held by  a Series is  called during  a period  of declining interest
rates, the Series probably will have to reinvest the proceeds received by it  at
a  lower interest rate than  that borne by the called  bond, thus resulting in a
decrease in the Series' income. To the extent that the Series invest in callable
corporate bonds, Series  shareholders bear  the risk that  reductions in  income
will result from the call of the bonds. Most United States Government securities
are not callable before their stated maturity.
 
   
OPTIONS, FUTURES, AND CURRENCY STRATEGIES. The use of forward currency contracts
and  options  and  futures  strategies  involve  certain  investment  risks  and
transaction costs. These risks include:  dependence on Advisers' (or  applicable
sub-advisers')  ability  to  predict  movements  in  the  prices  of  individual
securities; fluctuations  in the  general securities  markets and  movements  in
interest  rates and currency markets; imperfect correlation between movements in
the price  of  currency, options,  futures  contracts, or  options  thereon  and
movements  in the price  of the currency  or security hedged  or used for cover;
unexpected adverse price movements which could render a Series' hedging strategy
unsuccessful and could  result in losses;  the fact that  skills and  techniques
needed to trade options, futures contracts and options thereon or to use forward
currency  contracts are different from those  needed to select the securities in
which the Series invests; lack of assurance that a liquid secondary market  will
exist  for  any particular  option, futures  contract or  option thereon  at any
particular time requiring  a Series  to maintain  a position  until exercise  or
expiration, which could result in losses; and the possible need to defer closing
out  certain options, futures contracts and options thereon in order to continue
to qualify  for  the beneficial  tax  treatment afforded  "regulated  investment
companies"  under  the  Internal  Revenue  Code.  See  "Taxation."  In addition,
    
 
                                       26
<PAGE>
   
when a Series enters into an over-the-counter contract with a counterparty,  the
Series  will  assume  counterparty  credit  risk, that  is,  the  risk  that the
counterparty will fail  to perform  its obligations,  in which  case the  Series
could  be worse off than  if the contract had  not been entered into. Additional
detail concerning the use of  options and the risks  of such investments can  be
found in the Statement of Additional Information.
    
 
MORTGAGE-BACKED  SECURITIES. Because residential mortgage loans generally can be
prepaid in whole or in part by the borrowers at any time without any  prepayment
penalty,  the holder of a mortgage-backed  security which represents an interest
in a pool of  such mortgage loans  is subject to  a form of  call risk which  is
generally called "prepayment risk." In addition, it is more difficult to predict
the  effect of changes in market interest rates on the return on mortgage-backed
securities than  to predict  the  effect of  such changes  on  the return  of  a
conventional  fixed-rate debt instrument,  the magnitude of  such effects may be
greater in  some cases,  and  the return  on  certain types  of  mortgage-backed
securities,  such  as interest-only,  principal-only  and inverse  floating rate
mortgage-backed securities,  is particularly  sensitive to  changes in  interest
rates  and in the rate at which the mortgage loans underlying the securities are
prepaid  by   borrowers.   For  these   reasons,   a  Series'   investments   in
mortgage-backed  securities  may  involve  greater  risks  than  investments  in
governmental or  corporate  bonds.  For  further  information,  see  "Investment
Policies,  Restrictions, and Risks Applicable  to More Than One Series--Mortgage
Related Securities."
 
ACTIVE MANAGEMENT. All of the Series other than the S&P 500 Index Series  (which
utilizes  a  passive  investment  approach as  described  under  "S&P  500 Index
Series")  are  actively  managed  by  Advisers  or,  in  five  Series,  by   the
sub-advisers  as well. The performance of these Series therefore will reflect in
part the ability of  Advisers (or the sub-advisers)  to select securities  which
are  suited to achieving the Series'  investment objectives. Due to their active
management, these  Series could  underperform other  mutual funds  with  similar
investment objectives or the market generally.
 
MANAGEMENT
 
BOARD OF DIRECTORS
 
Under  Minnesota law,  the Board  of Directors of  Fortis Series  (the "Board of
Directors") has overall responsibility for managing Fortis Series in good faith,
in a manner reasonably believed  to be in the  best interests of Fortis  Series,
and  with  the  care an  ordinarily  prudent  person would  exercise  in similar
circumstances. However,  this  management  may be  delegated.  The  Articles  of
Incorporation  of Fortis Series limit the  liability of directors to the fullest
extent permitted by law.
 
THE INVESTMENT ADVISER/TRANSFER AGENT/DIVIDEND AGENT
 
   
Fortis Advisers, Inc.  ("Advisers") is the  investment adviser, transfer  agent,
and  dividend  agent  for each  Series.  Advisers has  been  managing investment
company portfolios since 1949,  and is indirectly owned  50% by Fortis AMEV  and
50%  by  Fortis AG,  diversified financial  services  companies. In  addition to
providing investment  advice,  Advisers is  responsible  for the  management  of
Fortis  Series' business affairs, subject to  the overall authority of the Board
of Directors. Advisers' address is P.O. Box 64284, St. Paul, MN 55164.
    
 
   
THE UNDERWRITER
    
 
   
Fortis Investors,  Inc.  ("Investors"),  a subsidiary  of  Advisers,  is  Fortis
Series' underwriter. Investors' address is that of Fortis Series.
    
 
   
PORTFOLIO MANAGEMENT
    
 
   
Money  Market Series has been  managed by Howard G.  Hudson, Robert C. Lindberg,
Maroun M. Hayek, and David C. Greenzang since 1995.
    
 
   
U.S. Government Securities  has been  managed by  Messrs. Hudson  and Hayek  and
Christopher J. Woods since 1995 and Christopher J. Pagano since 1996.
    
 
   
Diversified  Income Series has been managed  by Messrs. Hudson, Hayek, and Woods
and Charles J. Dudley since 1995 and Mr. Pagano since 1996.
    
 
   
High Yield Series has been managed by Messrs. Hudson, Dudley, Lindberg and Hayek
since 1995.
    
 
   
Asset Allocation Series has  been managed by Mr.  Hudson since 1995, Stephen  M.
Poling  since  1988, James  S. Byrd  since  1991, Keith  R. Thomson  since 1988,
Messrs. Dudley,  Hayek and  Woods since  1995,  and Mr.  Pagano and  Charles  L.
Mehlhouse since 1996.
    
 
   
Value  Series has been managed by Nicholas L.M. DePeyster and Daniel Dubin since
its inception.
    
 
   
Growth & Income Series has been  managed since its inception by Messrs.  Poling,
Byrd and Thomson and Charles L. Mehlhouse since 1996.
    
 
Global  Growth Series has been  managed since its inception  by Messrs. Byrd and
Poling.
 
   
Growth Stock Series has been managed by Messrs. Poling, Byrd, and Thomson  since
1986, 1991, and 1988, respectively.
    
 
Aggressive Growth Series has been managed since its inception by Messrs. Poling,
Byrd, and Thomson.
 
   
Mr.  Hudson, an Executive  Vice President of  Advisers and Head  of Fixed Income
Investments of  Advisers, has  been managing  debt securities  for Fortis,  Inc.
since 1991.
    
 
Messrs.  Poling and Byrd are Executive Vice Presidents and Mr. Thomson is a Vice
President of Advisers. Messrs. Poling, Byrd, and Thomson have managed portfolios
for Advisers for at least the past five years.
 
   
Mr. Dudley has been a Vice President  of Advisers since 1995, prior to which  he
was a Senior Vice President for SunAmerica Asset Management, New York, NY.
    
 
   
Mr.  Lindberg, a Vice  President of Advisers, has  been managing debt securities
for Advisers since 1993.
    
 
   
Mr. Rickert, a Vice  President of Advisers, has  been involved in management  of
debt  securities for Fortis, Inc.  since 1994. Prior to  that, Mr. Rickert was a
corporate bond analyst for Dillon, Read &  Co., Inc. in New York, NY and  before
that Western Asset Management in Los Angeles, CA.
    
 
   
Mr.  Hayek, a  Vice President  of Advisers  since 1995,  has been  managing debt
securities for Fortis, Inc. since 1987.
    
 
   
Mr. Woods,  a Vice  President of  Advisers since  1995, has  been managing  debt
securities for Fortis, Inc. since 1993.
    
 
   
Mr.  Pagano, a  Vice President  of Advisers since  1996, has  been managing debt
securities for Advisers since 1996. Prior to joining Advisers, Mr. Pagano was  a
Government Strategist for Merrill Lynch, New York, N.Y.
    
 
   
Mr. Greenzang, a Money Market Portfolio officer, has been involved in management
of debt securities for Fortis, Inc. since 1992.
    
 
                                       27
<PAGE>
   
Mr. Mehlhouse, a Vice President of Advisers, has managed portfolios for Advisers
since  1996. Prior to that, Mr. Mehlhouse was a portfolio manager for Marshall &
Isley Bank Corp., Milwaukee, Wisconsin, since 1993.
    
 
Mr. Dubin has been involved with management of Value Series since its inception.
Prior to that he  was a Trader  with Rockrimmon Securities  and an Analyst  with
American Express.
 
   
Mr.  DePeyster, a Vice President of  Advisers since 1995, has managed portfolios
for Advisers since 1991.
    
 
THE SUB-ADVISERS
 
   
Global Bond Series, Global Asset Allocation Series, International Stock  Series,
S&P  500 Index Series, Mid  Cap Stock Series, Blue  Chip Stock Series, Small Cap
Value Series and Large Cap Growth Series each have a sub-investment adviser.
    
 
   
Each  Series  has  retained  a  sub-adviser  under  an  investment  sub-advisory
agreement (collectively referred to as the "Sub-Advisory Agreements") to provide
investment  advice and, in general, to conduct the management investment program
of each Series,  subject to the  general control  of Advisers and  the Board  of
Directors  of  Fortis  Series.  Pursuant to  the  Sub-Advisory  Agreements, each
sub-adviser  will  regularly  provide  its  respective  Series  with  investment
research,  advice and supervision and furnish continuously an investment program
for  such  Series  consistent  with  its  investment  objectives  and  policies,
including the purchase, retention and disposition of securities.
    
 
The  sub-adviser of each Series is also responsible for the selection of brokers
and dealers to effect securities  transactions and the negotiation of  brokerage
commissions,  if any. Purchases and sales of securities on a securities exchange
are effected  through  brokers who  charge  a negotiated  commission  for  their
services.  Orders may be directed to any  broker including, to the extent and in
the  manner  permitted  by  applicable  law,  affiliates  of  the  sub-advisers.
Brokerage  services provided by affiliates of  the sub-advisers are performed in
conformity with Rule  17e-1 under  the 1940 Act  and procedures  adopted by  the
Board of Directors of Fortis Series.
 
   
GLOBAL  BOND  SERIES.  Mercury  Asset  Management  International  Ltd. ("Mercury
International"), 33  King William  Street,  London, EC4R  9AS, England,  is  the
sub-adviser   of  the  Global  Bond  Series.  Mercury  International,  which  is
registered as  an investment  adviser with  the Commission,  is a  wholly  owned
subsidiary  of Mercury Asset Management plc  ("Mercury") which manages in excess
of $  billion of investments on behalf of clients. Mercury International manages
in excess of $ billion of investments.
    
 
The Strategy Committee of the  Fixed Interest Division of Mercury  International
has primary portfolio management responsibility for the Global Bond Series. Each
of  the four  members of  the Strategy  Committee is  an officer  or director of
Mercury International.
 
   
GLOBAL ASSET ALLOCATION SERIES. Morgan  Stanley Asset Management Limited  ("MSAM
Limited"),  25  Cabot Square,  Canary Wharf,  London, E14  4QA, England,  is the
sub-adviser of  the  Global Asset  Allocation  Series. MSAM  Limited,  which  is
registered  as  an investment  adviser with  the Commission,  is a  wholly owned
subsidiary of Morgan Stanley Group Inc. Morgan Stanley provides a broad range of
portfolio management services to customers in  the United States and abroad  and
as of December 31, 1997 managed investments totaling approximately $  billion.
    
 
   
Portfolio responsibility for the Global Asset Allocation Series is split between
Frances Campion with respect to the equity securities and a team of fixed income
portfolio  managers  with respect  to fixed  income securities.  Frances Campion
joined MSAM  Limited in  1990 and  her responsibilities  include the  day-to-day
management  of  the global  equity  product. Ms.  Campion  has ten  years global
investment experience and became a principal  of MSAM Limited in December  1995.
The  investment  strategy and  allocation for  the fixed  income portion  of the
Series is set by  a team of  fixed income portfolio  managers at Morgan  Stanley
Asset   Management  Inc.,  an  affiliate  of  MSAM  Limited.  David  Stanley  is
responsible for the  day to  day implementation  of the  strategy and  portfolio
management  of the fixed income  portion of the Series.  Mr. Stanley joined MSAM
Limited in 1994 as a fixed income  manager. He was previously employed by  Aetna
Capital  Management International, where he had sole responsibility for managing
all European and global bond funds. Prior  to that, he spent over five years  at
Marine  and General Mutual Life Assurance Society, where he managed sterling and
global bond funds. He is a graduate of Manchester University.
    
 
INTERNATIONAL STOCK SERIES. Lazard Freres Asset Management ("Lazard Freres"), 30
Rockefeller Plaza,  New  York,  New  York  10020,  is  the  sub-adviser  of  the
International  Stock Series. Lazard Freres is a  division of Lazard Freres & Co.
LLC, a New York limited liability  company founded in 1848, which is  registered
as  an investment adviser with  the Commission and is a  member of the New York,
American and Midwest  Stock Exchanges.  Lazard Freres  & Co.  LLC, provides  its
clients  with  a  wide  variety of  investment  banking,  brokerage  and related
services.
 
   
Lazard Freres Asset Management provides investment management services to client
discretionary  accounts  with   assets  as   of  December   31,  1997   totaling
approximately  $   billion. Its clients  are both  individuals and institutions,
some of whose accounts have investment policies similar to those of the Series.
    
 
   
John R. Reinsberg, a managing director  of Lazard Freres, has primary  portfolio
management  responsibility for the International Stock Series. Mr. Reinsberg has
been primarily  responsible for  the  investment of  the  assets of  the  Lazard
International  Equity  Portfolio  of  The  Lazard  Funds,  Inc.  since  1992. In
addition, Herbert W.  Gullquist, a  managing director and  the Chief  Investment
Officer of Lazard Freres since 1982, has overall responsibility for managing the
Series.
    
 
   
S&P  500  INDEX  SERIES  AND  MID  CAP  STOCK  SERIES.  The  Dreyfus Corporation
("Dreyfus"), 200 Park Avenue,  New York, New York  10166, is the sub-adviser  to
the  S&P 500 Index  Series and the Mid  Cap Stock Series.  Dreyfus was formed in
1947. Dreyfus is  a wholly-owned  subsidiary of Mellon  Bank, N.A.,  which is  a
wholly-owned  subsidiary of Mellon Bank Corporation  ("Mellon"). As of March 31,
1998, Dreyfus  managed or  administered approximately  $ billion  in assets  for
approximately  million investor accounts nationwide.
    
 
   
Mellon  is  a  publicly  owned  multibank  holding  company  incorporated  under
Pennsylvania law in 1971  and registered under the  Bank Holding Company Act  of
1956,  as amended. Mellon  provides a comprehensive  range of financial products
and services in domestic and selected international markets. Mellon is among the
twenty-five largest bank holding companies in  the United States based on  total
assets.  Mellon's  principal wholly-owned  subsidiaries  are Mellon  Bank, N.A.,
Mellon Bank (DE)  National Association, Mellon  Bank (MD) National  Association,
The  Boston Company,  Inc., AFCO  Credit Corporation  and a  number of companies
known as  Mellon  Financial  Services Corporations.  Through  its  subsidiaries,
including  Dreyfus, Mellon managed more than $  billion in assets as of December
31, 1997, including approximately $  billion in proprietary mutual fund  assets.
As  of December  31, 1997, Mellon,  through various  subsidiaries, provided non-
investment services, such as custodial or administration services, for more than
$   billion in assets, including approximately $ billion in mutual fund assets.
    
 
                                       28
<PAGE>
   
John R. O'Toole  and Steven  A. Falci have  been primarily  responsible for  the
day-to-day  management of  Mid Cap Stock  Series since its  inception. They have
been employed  by the  Mellon organization  since 1979  and 1994,  respectively.
Prior  to 1994, Mr.  Falci was Managing  Director--Pension Investments for NYNEX
Corporation.
    
 
   
BLUE CHIP STOCK SERIES.  T. Rowe Price Associates,  Inc. ("T. Rowe Price"),  100
East  Pratt Street,  Baltimore, MD  21202, is the  sub-adviser of  the Blue Chip
Stock Series. T.  Rowe Price  was founded  in 1937,  and it  and its  affiliates
managed  over $ billion for over   million individual and institutional investor
accounts as  of  December  31, 1997.  Some  of  T. Rowe  Price's  accounts  have
investment policies similar to those of the Series.
    
 
Two  officers of  T. Rowe Price  have been  co-managers of the  Series since its
inception in 1996. Thomas H. Broadus,  Jr., the lead manager, has been  managing
investments  since joining  T. Rowe  Price in 1966.  Larry J.  Puglia, the other
co-manager, has been managing investments since joining T. Rowe Price in 1990.
 
   
SMALL CAP  VALUE  SERIES. Berger  Associates,  Inc. ("Berger  Associates"),  210
University  Boulevard, Denver, Colorado 80206, the  sub-adviser of the Small Cap
Value Series, has  entered into  an agreement  with Perkins,  Wolf, McDonnell  &
Company  (the "Manager") to provide the day-to-day investment management for the
Series.
    
 
   
Robert H. Perkins has been  primarily responsible for the day-to-day  management
of  Small Cap Value Series  since its inception. Mr.  Perkins is President and a
Director of the Manager and has been an investment manager since 1970.
    
 
   
LARGE CAP  GROWTH  SERIES.  Alliance Capital  Management  L.P.  ("Alliance"),  a
Delaware  limited  partnership  with principal  offices  at 1345  Avenue  of the
Americas, New York, New York 10105, is  the sub-adviser of the Large Cap  Growth
Series.  Alliance  is  an international  investment  manager  supervising client
accounts with assets as of December 31, 1997 totaling more than $218 billion (of
which approximately $85 billion represented the assets of investment companies).
Alliance's clients are primarily major corporate employee benefit funds,  public
employee  retirement  systems, investment  companies, foundations  and endowment
funds. The 54 registered investment companies managed by Alliance comprising 116
separate investment portfolios currently have over two million shareholders.  As
of  December 31,  1997, Alliance was  an investment manager  of employee benefit
plan assets for 31 of the Fortune 100 companies.
    
 
   
Alliance Capital Management Corporation ("ACMC"),  the sole general partner  of,
and  owner of  a 1%  general partnership interest  in, Alliance,  is an indirect
wholly-owned subsidiary of The  Equitable Life Assurance  Society of the  United
States  ("Equitable"),  which  is  a wholly-owned  subsidiary  of  The Equitable
Companies Incorporated,  a  holding  company controlled  by  AXA-UAP,  a  French
insurance holding company.
    
 
   
James  G.  Reilly,  a Senior  Vice  President  of Alliance,  has  been primarily
responsible for the day-to-day management of  Large Cap Growth Series since  its
inception.
    
 
EXPENSES
 
   
For  the  most recent  fiscal year,  the  ratio of  total operating  expenses to
average daily net assets and the advisory  fee as a percentage of average  daily
net  assets for each Series is listed below. Advisory fees are part of operating
expenses and are included in Total Operating Expense figures.
    
 
   
<TABLE>
<CAPTION>
                                                   TOTAL OPERATING    ADVISORY
                                                       EXPENSE           FEE
                                                  -----------------  -----------
<S>                                               <C>                <C>
Money Market Series                                       0.38%           0.30%
U.S. Government Securities Series                         0.53%           0.46%
Diversified Income Series                                 0.55%           0.47%
Global Bond Series                                        1.02%           0.75%
High Yield Series                                         0.63%           0.50%
Global Asset Allocation Series                            1.20%           0.90%
Asset Allocation Series                                   0.54%           0.48%
Value Series                                              0.87%           0.68%
Growth & Income Series                                    0.76%           0.70%
S&P 500 Series                                            0.79%           0.40%
Blue Chip Stock Series                                    1.13%           0.90%
International Stock Series                                1.15%           0.85%
Mid Cap Stock Series                                      *               *
Small Cap Value Series                                    *               *
Global Growth Series                                      0.79%           0.70%
Large Cap Growth Series                                   *               *
Growth Stock Series                                       0.67%           0.62%
Aggressive Growth Series                                  0.78%           0.70%
</TABLE>
    
 
- --------------------------
   
*  Not in operation during the most recently completed fiscal year.
    
 
BROKERAGE ALLOCATION
 
Advisers may  consider sales  of shares  of Fortis  Series, and  of other  funds
advised  or administered by  Advisers or a  sub-adviser may be  considered, as a
factor in the selection of  broker-dealers to execute Fortis Series'  securities
transactions  when it is believed  that this can be  done without causing Fortis
Series to pay more in brokerage commissions than it would otherwise.
 
PERIODIC REPORTS
 
Contract  owners  will  receive  semiannual  reports  including  the   financial
statements  of the Series  to which their  premiums have been  allocated and the
investments held in each such Series.
 
CAPITAL STOCK
 
Fortis Series has only common shares with equal voting rights.
 
VOTING PRIVILEGES
 
The voting privileges of Contract owners, and limitations thereon, are explained
in the accompanying prospectus for the Contracts. The shareholders are  entitled
to  vote all of  the shares of Fortis  Series, but they will  generally do so in
accordance  with  the  instructions  of  the  Contract  owners.  Under   certain
circumstances,  however, shareholders may disregard voting instructions received
from Contract  owners. For  additional information  describing how  shareholders
will  vote  the  shares  of  Fortis  Series,  see  "Voting  Privileges"  in  the
accompanying prospectus(es) for the applicable Contracts.
 
DIVIDENDS AND CAPITAL GAINS DISTRIBUTIONS
 
Fortis Series intends to distribute at least annually as dividends substantially
all the net investment  income, if any, of  each Series. For dividend  purposes,
net   investment  income   of  each  Series   will  consist   of  all  dividends
 
                                       29
<PAGE>
(other than  stock dividends)  or  interest received  by  such Series  less  the
accrued  expenses  of each  such  Series. Fortis  Series  will also  declare and
distribute all net  realized capital gains  annually. Dividends from  investment
income  of  the Series  and capital  gains distributions  will be  reinvested in
additional full and fractional shares. Dividends and distributions on shares not
attributable to Contracts, however, may be paid in cash.
 
TAXATION
 
Each Series  intends to  qualify as  a regulated  investment company  under  the
Internal  Revenue Code of 1986, as amended. So long as each Series so qualifies,
the Series is not taxed on the  income it distributes to the Separate  Accounts.
So  long as each  Series qualifies as  a regulated investment  company and meets
certain diversification  tests  applicable  to  the  segregated  asset  accounts
underlying  variable annuity and  life insurance contracts,  the Contract owners
will not be considered to be the owners of the shares of the Series, and  income
earned with respect to the Contracts will not be taxed currently to the Contract
owners.
 
For  the tax consequences of owning  a Contract, see the accompanying prospectus
for the Contracts. For more information  concerning the taxation of the  Series,
see "Taxation" in the Statement of Additional Information.
 
PURCHASE AND REDEMPTION OF SHARES
 
GENERALLY
 
   
Shares  in Fortis Series are  currently offered at the  respective per share net
asset value  of  each Series.  Such  shares are  offered  only to  the  Separate
Accounts,  which  fund benefits  payable under  the  Contracts described  in the
accompanying prospectus. Fortis Series sells its shares to the Separate Accounts
through Fortis Investors, Inc. ("Investors"). Investors receives no underwriting
compensation from Fortis Series. Fortis Series may in the future also offer  its
shares to separate accounts of other insurance companies.
    
 
The  Board of Directors  will monitor events  for the existence  of any material
irreconcilable  conflict  between  or  among  owners  of  insurance  or  annuity
contracts,  and  the relevant  insurance companies  will take  whatever remedial
action may  be  necessary and  appropriate.  Fortis Benefits  and  First  Fortis
currently  do not foresee any disadvantages  to their respective Contract owners
arising out of the fact that Fortis  Series offers its shares both for  variable
life  insurance  policies and  variable  annuity contracts.  However,  should an
irreconcilable conflict arise between the Separate Accounts, the conflict  could
result in one or more of the Separate Accounts terminating its relationship with
Fortis  Series, thus necessitating  the liquidation of  portfolio securities and
thereby potentially having  an adverse  impact on the  net asset  values of  the
affected Series.
 
On  each day  when Fortis Series  values its  assets, shares of  each Series are
purchased or redeemed by the Separate  Accounts based upon, among other  things,
the  amounts of  net premiums allocated  to the Separate  Account, dividends and
distributions reinvested, transfers  to and  among subaccounts  of the  Separate
Accounts,  policy loans, loan repayments and benefit payments to be processed on
that date. Such purchases and redemptions for the Separate Account are  effected
at  the net  asset value per  share for each  Series determined as  of that same
date. Any orders to purchase or redeem  Fortis Series shares that do not  result
automatically from Contract transactions will be effected at the net asset value
per share next computed after the order is placed.
 
Investors,  Advisers  and Fortis  Series each  reserve the  right to  reject any
purchase order.
 
OFFERING PRICE
 
   
The offering prices  of each Series'  shares are determined  once daily and  are
equal  to the  net asset values  per share  of the shares  next calculated after
receipt of  the purchase  order. The  Series'  net asset  values per  share  are
determined by dividing the value of the securities owned by the Series, plus any
cash  or other assets, less all liabilities, by the number of the Series' shares
outstanding. All  significant expenses,  including the  investment advisory  fee
payable  to Advisers, are  accrued daily. The portfolio  securities in which the
Series invest fluctuate in value,  and hence the net  asset values per share  of
the  Series  also fluctuate.  The net  asset  values of  the Series'  shares are
determined as of the  primary closing time  for business on  the New York  Stock
Exchange (the "Exchange") on each day on which the Exchange is open.
    
 
Securities  are generally valued at market value. A security listed or traded on
an exchange  is valued  at its  last  sale price  on the  exchange where  it  is
principally  traded on the day  of valuation. Lacking any  sales on the exchange
where it is principally traded on the day of valuation, prior to the time as  of
which  assets are valued, the security generally is valued at the previous day's
last sale price  on that exchange.  A security  listed or traded  on the  Nasdaq
National Market is valued at its last sale price that day, and lacking any sales
that  day on the Nasdaq National Market, the security generally is valued at the
last bid  price. Options  will  be valued  at market  value  or fair  value,  as
determined in good faith by the Board of Directors, if no market exists. Futures
contracts  will be valued  in a like  manner except that  open futures contracts
sales will be valued using  the closing settlement price  or, in the absence  of
such a price, the most recent quoted asked price.
 
An  outside  pricing  service may  be  utilized  to provide  valuations  of debt
securities. The pricing service may employ electronic data processing techniques
and/or a  matrix system  to  determine valuations  using methods  which  include
consideration of yields or prices of bonds of comparable quality, type of issue,
coupon,  maturity and rating; indications as  to value from dealers; and general
market conditions. When  market quotations  are not readily  available, or  when
illiquid  securities or other assets are  being valued, such securities or other
assets are valued at fair value as determined in good faith by management  under
supervision  of the Series'  Board of Directors.  Short-term investments in debt
securities with  maturities  of  less  than 60  days  when  acquired,  or  which
subsequently  are  within 60  days of  maturity, are  valued at  amortized cost.
Purchases and  sales  by the  non-sub-advised  Series after  2:00  P.M.  Central
Time--and  purchases  and  sales  by the  sub-advised  Series--normally  are not
recorded until the following business day.
 
Any assets or liabilities initially expressed in terms of foreign currencies are
translated into U.S. dollars at the official exchange rate or, alternatively, at
the mean of the current bid and asked prices of such currencies against the U.S.
dollar last quoted by a major bank that is a regular participant in the  foreign
exchange market or on the basis of a pricing service that takes into account the
quotes  provided  by  a  number  of  such  major  banks.  If  neither  of  these
alternatives is available nor provides  a suitable methodology for converting  a
foreign  currency into U.S. dollars,  the Board of Directors  in good faith will
establish a conversion rate for such currency.
 
European or Far Eastern  securities trading may  not take place  on all days  on
which  the Exchange is open.  Trading in securities on  European and Far Eastern
securities exchanges  and over-the-counter  markets is  normally completed  well
before  the close of the business day  in New York. Further, trading takes place
in Japanese markets on certain Saturdays and in various foreign markets on  days
on  which the Exchange is not open and  therefore the Series' net asset value is
not calculated. The calculation of the Series' net asset value therefore may not
take place contemporaneously with the determination of the prices of  securities
held by the Series. Events
 
                                       30
<PAGE>
affecting  the values of portfolio securities  that occur between the time their
prices are determined and the close of the Exchange will not be reflected in the
Series' net asset value unless management, under the supervision of the Board of
Directors, determines  that the  particular event  would materially  affect  net
asset  value. As  a result,  the Series'  net asset  value may  be significantly
affected by such trading on days when Fortis Series is not open for  shareholder
purchases and redemptions.
 
TRANSFERS AMONG SUBACCOUNTS
 
   
Contract  owners may transfer  amounts among the  subaccounts available to them,
and may  change  allocations  of  premiums  as  explained  in  the  accompanying
prospectus  for  the Contracts.  Transfers between  subaccounts are  not taxable
under current Federal income tax law.
    
 
REDEMPTION
 
Fortis Series is  required to redeem  all full and  fractional shares of  Fortis
Series for cash within seven days of receipt of proper notice of redemption. The
net  asset value of redeemed shares may be more or less than the net asset value
of the same shares at the time the Separate Account invested in such shares.
 
   
For further  information,  Contract owners  may  also contact  Fortis  Benefits'
office,  the address of which is the same as that of Fortis Series, as set forth
on the cover of this Prospectus.  New York contract owners should contact  First
Fortis' office: P.O. Box 3209, Syracuse, New York 13220.
    
 
APPENDIX
 
COMMERCIAL PAPER RATINGS
 
STANDARD  & POOR'S RATINGS SERVICES. A Standard & Poor's commercial paper rating
is a current assessment of  the likelihood of timely  payment of debt having  an
original  maturity of no more than 365  days. Ratings are graded into categories
ranging from "A" for the highest quality obligations to "D" for the lowest.
 
"A"   Issues assigned this highest  rating are regarded  as having the  greatest
      capacity  for timely payment. Issues in  this category are delineated with
      the numbers 1, 2 and 3 to indicate the relative degree of safety.
 
"A-1"  This designation 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 with a (+) sign
       designation.
 
"A-2"  Capacity for timely payment  on issues with  this designation is  strong.
       However,  the relative  degree of  safety is  not as  high as  for issues
       designated "A-1."
 
"A-3"  Issues carrying this designation have a satisfactory capacity for  timely
       payment.  They  are, however,  somewhat  more vulnerable  to  the adverse
       effects of changes in circumstances than obligations carrying the  higher
       designations.
 
The  commercial  paper rating  is not  a  recommendation to  purchase or  sell a
security. The ratings are based on  current information furnished to Standard  &
Poor's  by the issuer or obtained from  other sources it considers reliable. The
ratings may be changed,  suspended, or withdrawn  as a result  of changes in  or
unavailability of such information.
 
MOODY'S  INVESTORS SERVICE, INC. Moody's short-term debt ratings are opinions of
the ability of  the issuers to  repay punctually senior  debt obligations  which
have   an  original   maturity  not  exceeding   one  year.   Moody's  makes  no
representation that  such obligations  are exempt  from registration  under  the
Securities  Act of 1933, nor does it represent that any specific note is a valid
obligation of a rated  issuer or issued in  conformity with any applicable  law.
Moody's  employs the following  three designations, all  judged to be investment
grade, to indicate the relative repayment capacity of rated issuers:
 
"Prime-1"  Superior ability for repayment of senior short-term debt obligations.
 
"Prime-2"  Strong ability for repayment of senior short-term debt obligations.
 
"Prime-3"  Acceptable  ability   for  repayment   of  senior   short-term   debt
           obligations.
 
CORPORATE BOND RATINGS
 
STANDARD  & POOR'S  RATINGS SERVICES. Its  ratings for corporate  bonds have the
following definitions:
 
Debt rated "AAA" has the highest rating assigned by Standard & Poor's.  Capacity
to pay interest and repay principal is extremely strong.
 
Debt  rated "AA" has a very strong  capacity to pay interest and repay principal
and differs from the higher rated issues only in a small degree.
 
Debt rated  "A" has  a strong  capacity  to pay  interest and  repay  principal,
although  it is somewhat more  susceptible to the adverse  effects of changes in
circumstances and economic conditions than debt in higher rated categories.
 
Debt rated "BBB" is regarded as having an adequate capacity to pay interest  and
repay  principal. Whereas  it normally exhibits  adequate protection parameters,
adverse economic conditions or changing circumstances are more likely to lead to
a weakened  capacity  to pay  interest  and repay  principal  for debt  in  this
category than in higher rated categories.
 
Debt  rated  "BB,"  "B,"  "CCC,"  "CC," and  "C"  is  regarded,  on  balance, as
predominantly speculative with  respect to  capacity to pay  interest and  repay
principal  in accordance  with the terms  of the obligation.  "BB" indicates the
lowest degree of speculation  and "C" the highest  degree of speculation.  While
such  debt will likely  have some quality  and protective characteristics, these
are outweighed  by  large  uncertainties  or major  risk  exposures  to  adverse
conditions.
 
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  which  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.
 
Debt rated "CCC" has a currently  identifiable vulnerability to default, and  is
dependent  upon favorable business,  financial, and economic  conditions to meet
timely payment of interest and repayment  of principal. In the event of  adverse
business,  financial,  or economic  conditions,  it is  not  likely to  have the
capacity to pay interest and repay principal. The "CCC" rating category is  also
used  for debt subordinated to senior debt that is assigned an actual or implied
"B" or "B-" rating.
 
                                       31
<PAGE>
The rating "CC" is typically applied to debt subordinated to senior debt that is
assigned an actual or implied "CCC" rating.
 
The rating "C" is typically applied to debt subordinated to senior debt which is
assigned an actual or implied "CCC-" debt rating. The "C" rating may be used  to
cover  a situation where a bankruptcy petition  has been filed, but debt service
payments are continued.
 
The rating "CI" is reserved for income bonds on which no interest is being paid.
 
Debt rated "D"  is in  payment default.  The "D"  rating category  is used  when
interest payments or principal payments are not made on the date due even if the
applicable  grace period has not expired, unless Standard & Poor's believes that
such payments will be made during such grace period. The "D" rating also will be
used upon  the filing  of a  bankruptcy petition  if debt  service payments  are
jeopardized.
 
The  ratings from "AA"  to "CCC" may  be modified by  the addition of  a plus or
minus sign to show relative standing within the major categories.
 
"NR" indicates that  no rating has  been requested, that  there is  insufficient
information on which to base a rating, or that Standard & Poor's does not rate a
particular type of obligation as a matter of policy.
 
MOODY'S  INVESTORS SERVICE,  INC. Its  ratings for  corporate bonds  include the
following:
 
Bonds which are rated "Aaa" are judged to be of the best quality. They carry the
smallest degree of investment risk and are generally referred to as "gilt edge."
Interest payments are protected by a large or by an exceptionally stable  margin
and  principal is  secure. While the  various protective elements  are likely to
change, such  changes as  can be  visualized  are most  unlikely to  impair  the
fundamentally strong position of such issues.
 
Bonds  which are rated "Aa"  are judged to be of  high quality by all standards.
Together with the Aaa group they comprise what are generally known as high grade
bonds. They are rated  lower than the best  bonds because margins of  protection
may  not be as large as in  Aaa securities or fluctuation of protective elements
may be of greater amplitude  or there may be  other elements present which  make
the long-term risk appear somewhat larger than in Aaa securities.
 
Bonds  which  are rated  "A" possess  many  favorable 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 which
suggest a susceptibility to impairment sometime in the future.
 
Bonds  which are rated  "Baa" 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 which are rated "Ba" 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"  generally  lack characteristics  of  the 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.
 
Bonds  which are rated "Caa" are of poor standing. Such issues may be in default
or there  may  be  present elements  of  danger  with respect  to  principal  or
interest.
 
Bonds which are rated "Ca" represent obligations which are speculative in a high
degree. Such issues are often in default or have other marked shortcomings.
 
Bond which rated "C" are the lowest rated class of bonds and issues so rated can
be  regarded  as having  extremely  poor prospects  of  ever attaining  any real
investment standing.
 
BOND INVESTMENT  QUALITY STANDARDS:  Under present  commercial bank  regulations
issued  by  the  Comptroller  of  the Currency,  bonds  rated  in  the  top four
categories (Moody's ratings Aaa,  Aa, A and Baa,  and Standard & Poor's  ratings
AAA,  AA, A and BBB, commonly known as "Investment Grade" ratings) are generally
regarded as eligible for bank investment. In addition, the Legal Investment Laws
of various  states impose  certain  rating or  other standards  for  obligations
eligible  for investment by savings  banks, trust companies, insurance companies
and fiduciaries generally.
 
PREFERRED STOCK RATING
 
STANDARD & POOR'S  RATINGS SERVICES. Its  ratings for preferred  stock have  the
following definitions:
 
An  issue rated "AAA" has the highest rating  that may be assigned by Standard &
Poor's to a preferred stock issue and indicates an extremely strong capacity  to
pay the preferred stock obligations.
 
A preferred stock issue rated "AA" also qualifies as a high-quality fixed income
security.  The  capacity  to pay  preferred  stock obligations  is  very strong,
although not as overwhelming as for issues rated "AAA."
 
An issue rated  "A" is backed  by a sound  capacity to pay  the preferred  stock
obligations,  although it is somewhat more susceptible to the adverse effects of
changes in circumstances and economic conditions.
 
An issue rated "BBB" is  regarded as backed by an  adequate capacity to pay  the
preferred  stock obligations.  Whereas it normally  exhibits adequate protection
parameters, adverse  economic conditions,  or  changing circumstances  are  more
likely  to lead to a weakened capacity to make payments for a preferred stock in
this category than for issues in the "A" category.
 
MOODY'S INVESTORS  SERVICE, INC.  Its ratings  for preferred  stock include  the
following:
 
An issue which is rated "Aaa" is considered to be a top-quality preferred stock.
This  rating  indicates good  asset protection  and the  least risk  of dividend
impairment within the universe of preferred stocks.
 
An issue which is  rated "Aa" is considered  a high-grade preferred stock.  This
rating  indicates that  there is  reasonable assurance  that earnings  and asset
protection will remain relatively well maintained in the foreseeable future.
 
An issue which is rated "A" is considered to be an upper-medium grade  preferred
stock.  While risks are judged to be somewhat greater than in the "aaa" and "aa"
classifications, earnings and asset protection  are nevertheless expected to  be
maintained at adequate levels.
 
An  issue which is rated "Baa" is  considered to be medium grade, neither highly
protected nor poorly secured. Earnings  and asset protection appear adequate  at
present but may be questionable over any great length of time.
 
                                       32
<PAGE>
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<PAGE>
   
[LOGO]
    
FORTIS FINANCIAL GROUP
P.O. BOX 64284
ST. PAUL, MN 55164
 
     BULK RATE
    U.S. POSTAGE
        PAID
  PERMIT NO. 3794
  MINNEAPOLIS, MN
 
PROSPECTUS
   
MAY 1, 1998
    
 
FORTIS
SERIES FUND, INC.
<PAGE>
   
                            FORTIS SERIES FUND, INC.
                      STATEMENT OF ADDITIONAL INFORMATION
                               DATED MAY 1, 1998
    
 
This Statement of Additional Information is NOT a prospectus, but should be read
in   conjunction   with  the   Fortis  Series   Fund,  Inc.   ("Fortis  Series")
 
   
Prospectus dated May 1,  1998. A copy  of that prospectus  may be obtained  from
Fortis Series, P.O. Box 64582, St. Paul, Minnesota 55164.
    
 
No  broker-dealer, sales representative, or other  person has been authorized to
give any information or to make  any representations other than those  contained
in  this  Statement  of  Additional  Information, and  if  given  or  made, such
information or representations must not be relied upon as having been authorized
by Fortis  Benefits Insurance  Company ("Fortis  Benefits"), First  Fortis  Life
Insurance  Company ("First  Fortis"), Fortis  Series, or  Fortis Investors, Inc.
("Investors"). This Statement of Additional  Information does not constitute  an
offer or solicitation by anyone in any state in which such offer or solicitation
is  not authorized, or in which the  person making such offer or solicitation is
not qualified to do  so, or to any  person to whom it  is unlawful to make  such
offer or solicitation.
 
                                       33
<PAGE>
TABLE OF CONTENTS
   
<TABLE>
<CAPTION>
                                                    PAGE
<S>                                                 <C>
ORGANIZATION AND CLASSIFICATION...................  35
INVESTMENT OBJECTIVES AND POLICIES................  35
    - General.....................................  35
    - Certificates of Deposit and Bankers'
      Acceptances.................................  35
    - Mortgage-Related Securities.................  35
    - Securities of Foreign Companies.............  37
    - Repurchase Agreements.......................  37
    - Reverse Repurchase Agreements...............  38
    - Extendible Notes............................  38
    - Delayed Delivery Transactions...............  38
    - Dollar Rolls................................  38
    - Lending of Portfolio Securities.............  39
    - Options.....................................  39
    - Futures Contracts and Options on
      Futures Contracts...........................  39
    - Foreign Currency Forward
      Exchange Contracts..........................  40
    - Segregated Accounts.........................  40
    - Restricted or Illiquid Securities...........  40
    - Warrants or Rights..........................  40
    - Short Sales Against the Box.................  40
    - Investment Restrictions.....................  40
    - Risk Factors................................  48
 
<CAPTION>
                                                    PAGE
<S>                                                 <C>
 
DIRECTORS AND EXECUTIVE OFFICERS..................  49
INVESTMENT ADVISORY AND OTHER SERVICES............  52
    - General.....................................  52
    - Control and Management of Advisers and
      Investors...................................  52
    - Investment Advisory and Management
      Agreement...................................  52
    - Sub-Advisory Agreements.....................  53
PORTFOLIO TRANSACTIONS AND ALLOCATION OF
 BROKERAGE........................................  53
CAPITAL STOCK.....................................  55
COMPUTATION OF NET ASSET VALUE AND PRICING........  56
REDEMPTION........................................  56
TAXATION..........................................  57
UNDERWRITER.......................................  57
PERFORMANCE.......................................  58
SYSTEMATIC WITHDRAWAL.............................  59
FINANCIAL STATEMENTS..............................  60
CUSTODIAN AND COUNSEL.............................  60
LIMITATION OF DIRECTOR LIABILITY..................  60
ADDITIONAL INFORMATION............................  60
APPENDIX--DESCRIPTION OF FUTURES, OPTIONS, AND
 FORWARD CONTRACTS................................  61
</TABLE>
    
 
                                       34
<PAGE>
ORGANIZATION AND CLASSIFICATION
 
   
An investment company is an arrangement by which a number of persons invest in a
company  that in  turn invests in  securities of other  companies. Fortis Series
operates as  an  "open-end" investment  company  and generally  must  redeem  an
investor's  shares upon request. Fortis Series  is currently made up of eighteen
separate series  (the "Series").  Because the  Series, except  Global Bond  Fund
Series,  are diversified, they offer investors  an opportunity to minimize their
risk  by  spreading  their  investment  over  a  number  of  issuers.   However,
diversification  cannot eliminate such risks. The Global Bond Series operates as
a nondiversified investment company.
    
 
INVESTMENT OBJECTIVES AND POLICIES
 
GENERAL
 
   
Each Series, except the Global Bond Series, operates as a diversified investment
company as defined under  the Investment Company Act  of 1940 (the "1940  Act"),
which  means that it must  meet the following requirements:  at least 75% of the
value of its total assets will be represented by cash and cash items  (including
receivables),  Government securities, securities  of other investment companies,
and other securities for the purposes of this calculation limited in respect  of
any  one issuer to an  amount not greater in  value than 5% of  the value of the
total assets of the Series  and to not more than  10% of the outstanding  voting
securities of such issuer.
    
 
   
Although Global Bond Series is classified as a nondiversified investment company
under  the  1940 Act,  Global  Bond Series  is  still required  to  meet certain
diversification requirements  in order  to qualify  as a  "regulated  investment
company"  for federal  income tax  purposes under  the Internal  Revenue Code of
1986, as  amended (the  "Code"). To  so  qualify, the  Global Bond  Series  must
diversify  its holdings  so that, at  the close  of each quarter  of its taxable
year, (a) at least 50% of the value of its total assets is represented by  cash,
cash  items,  securities  issued  by  the  U.S.  Government,  its  agencies  and
instrumentalities, the securities of  other regulated investment companies,  and
other  securities limited generally with respect to  any one issuer to an amount
not more than 5% of the total assets of the Global Bond Series and not more than
10% of the outstanding voting securities of  such issuer, and (b) not more  than
25% of the value of its total assets is invested in the securities of any issuer
(other   than  securities  issued  by  the  U.S.  Government,  its  agencies  or
instrumentalities or the securities of other regulated investment companies), or
in two or more issuers that the Global Bond Series controls and that are engaged
in the same or similar trades or businesses.
    
 
CERTIFICATES OF DEPOSIT AND BANKERS' ACCEPTANCES
 
As noted in the Prospectus, the  Series may invest in certificates of  deposits.
Certificates  of  deposit are  receipts issued  by  a bank  in exchange  for the
deposit of funds. The issuer agrees to pay the amount deposited plus interest to
the bearer  of  the  receipt on  the  date  specified on  the  certificate.  The
certificate  usually can  be traded in  the secondary market  prior to maturity.
Bankers'  acceptances  typically  arise  from  short-term  credit   arrangements
designed   to  enable   businesses  to   obtain  funds   to  finance  commercial
transactions. Generally, an acceptance  is a time  draft drawn on  a bank by  an
exporter  or importer  to obtain a  stated amount  of funds to  pay for specific
merchandise.  The  draft  is  then  "accepted"  by  a  bank  that,  in   effect,
unconditionally  guarantees  to pay  the  face value  of  the instrument  on its
maturity date. The  acceptance may  then be  held by  the accepting  bank as  an
earning  asset or it  may be sold in  the secondary market at  the going rate of
discount for a specific maturity. Although maturities for acceptances can be  as
long as 270 days, most acceptances have maturities of six months or less.
 
MORTGAGE-RELATED SECURITIES
 
Consistent with the investment objectives and policies of all but the Aggressive
Growth  Series as set  forth in the Prospectus,  and the investment restrictions
set forth below,  the Series  may invest  in certain  types of  mortgage-related
securities.  One type  of mortgage-related security  includes certificates which
represent pools of  mortgage loans assembled  for sale to  investors by  various
governmental  and  private  organizations. These  securities  provide  a monthly
payment, which consists of both an interest and a principal payment, which is in
effect a "pass-through" of the monthly payment made by each individual  borrower
on  his or her residential mortgage loan, net  of any fees paid to the issuer or
guarantor of such securities.  Additional payments are  caused by repayments  of
principal  resulting  from  the  sale of  the  underlying  residential property,
refinancing or foreclosure,  net of fees  or costs which  may be incurred.  Some
certificates   (such  as  those  issued  by  the  Government  National  Mortgage
Association) are described as "modified pass-through." These securities  entitle
the  holder to receive all interest and  principal payments owed on the mortgage
pool, net of certain  fees, regardless of whether  the mortgagor actually  makes
the payment.
 
A  major governmental guarantor  of pass-through certificates  is the Government
National Mortgage Association ("GNMA"). GNMA guarantees, with the full faith and
credit of the  United States government,  the timely payments  of principal  and
interest  on securities issued by institutions approved by GNMA (such as savings
and loan  institutions, commercial  banks and  mortgage bankers)  and backed  by
pools  of FHA-insured or VA-guaranteed  mortgages. Other governmental guarantors
(but not backed by the  full faith and credit  of the United States  Government)
include  the Federal National Mortgage Association ("FNMA") and the Federal Home
Loan Mortgage Corporation ("FHLMC"). FNMA purchases residential mortgages from a
list of approved  seller/servicers which include  state and  federally-chartered
savings and loan associations, mutual savings banks, commercial banks and credit
unions and mortgage bankers.
 
       (i)  GNMA CERTIFICATES.  Certificates of  the GNMA  ("GNMA Certificates")
       evidence an  undivided  interest  in  a  pool  of  mortgage  loans.  GNMA
       Certificates  differ from bonds in that principal is paid back monthly as
       payments of principal,  including prepayments,  on the  mortgages in  the
       underlying  pool are passed  through to holders  of the GNMA Certificates
       representing interests in the pool, rather than returned in a lump sum at
       maturity. "Modified pass-through" GNMA Certificates entitle the holder to
       receive a share of  all interest and principal  payments paid or owed  to
       the  mortgage pool,  net of fees  paid or  due to the  "issuer" and GNMA,
       regardless of whether or not the mortgagor actually makes the payment.
 
       (ii)  GNMA  GUARANTEE.  The  National  Housing  Act  authorizes  GNMA  to
       guarantee  the  timely payment  of principal  and interest  on securities
       backed  by  a  pool   of  mortgages  insured   by  the  Federal   Housing
       Administration  ("FHA") or the Farmers'  Home Administration ("FmHA"), or
       guaranteed by the Veterans Administration ("VA"). GNMA is also  empowered
       to  borrow without  limitation from the  U.S. Treasury,  if necessary, to
       make any payments required under its guarantee.
 
       (iii) LIFE OF GNMA CERTIFICATES. The  average life of a GNMA  Certificate
       is  likely  to be  substantially  less than  the  stated maturity  of the
       mortgages  underlying  the  securities.   Prepayments  of  principal   by
       mortgagors and mortgage foreclosures will usually result in the return of
       the  greater part of principal investment long before the maturity of the
       mortgages in  the  pool. Foreclosures  impose  no  risk of  loss  of  the
       principal  balance of a  Certificate, because of  the GNMA guarantee, but
       foreclosure may impact the yield to  shareholders because of the need  to
       reinvest proceeds of foreclosure.
 
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<PAGE>
       As  prepayment rates of individual mortgage  pools vary widely, it is not
       possible to predict accurately the average life of a particular issue  of
       GNMA Certificates. However, statistics published by the FHA indicate that
       the  average life of single family  dwelling mortgages with 25 to 30-year
       maturities, the  type of  mortgages  backing the  vast majority  of  GNMA
       Certificates,  is  approximately  12  years.  Prepayments  are  likely to
       increase in periods of falling interest  rates. It is customary to  treat
       GNMA  Certificates  as  30-year mortgage-backed  securities  which prepay
       fully in the twelfth year.
 
       (iv) YIELD  CHARACTERISTICS  OF GNMA  CERTIFICATES.  The coupon  rate  of
       interest of GNMA Certificates is lower than the interest rate paid on the
       VA-guaranteed  or FHA-insured  mortgages underlying  the certificates, by
       the amount of the fees paid to GNMA and the issuer.
 
       The coupon rate  by itself, however,  does not indicate  the yield  which
       will  be earned  on GNMA  Certificates. First,  GNMA Certificates  may be
       issued at a premium or discount, rather than at par, and, after issuance,
       GNMA Certificates  may trade  in the  secondary market  at a  premium  or
       discount.  Second, interest is earned  monthly, rather than semi-annually
       as with traditional bonds; monthly compounding raises the effective yield
       earned. Finally, the actual yield of a GNMA Certificate is influenced  by
       the  prepayment  experience  of  the  mortgage  pool  underlying  it. For
       example, if interest rates decline, prepayments may occur faster than had
       been originally projected and the yield to maturity and investment income
       would be reduced.
 
       (v) FHLMC  SECURITIES.  "FHLMC"  is  a  federally  chartered  corporation
       created  in 1970  through enactment  of Title  III of  the Emergency Home
       Finance Act  of  1970.  Its  purpose  is  to  promote  development  of  a
       nationwide secondary market in conventional residential mortgages.
 
       The  FHLMC issues two types of mortgage pass-through securities, mortgage
       participation certificates ("PCs")  and guaranteed mortgage  certificates
       ("GMCs"). PCs resemble GNMA Certificates in that each PC represents a pro
       rata  share of all  interest and principal  payments made or  owed on the
       underlying pool. The FHLMC guarantees  timely payment of interest on  PCs
       and  the ultimate payment  of principal. Like  GNMA Certificates, PCs are
       assumed to be prepaid fully in their twelfth year.
 
       GMCs also represent a pro rata interest in a pool of mortgages.  However,
       these  instruments pay interest semi-annually and return principal once a
       year in guaranteed minimum payments.  The expected average life of  these
       securities is approximately ten years.
 
       (vi) FNMA SECURITIES. "FNMA" is a federally chartered and privately owned
       corporation which was established in 1938 to create a secondary market in
       mortgages  insured  by  the  FHA.  It  was  originally  established  as a
       government agency and was transformed into a private corporation in 1968.
 
       FNMA  issues   guaranteed  mortgage   pass-through  certificates   ("FNMA
       Certificates"). FNMA Certificates resemble GNMA Certificates in that each
       FNMA  Certificate  represents  a  pro  rata  share  of  all  interest and
       principal payments made or owed  on the underlying pool. FNMA  guarantees
       timely  payment of interest  on FNMA certificates and  the full return of
       principal. Like GNMA  Certificates, FNMA Certificates  are assumed to  be
       prepaid fully in their twelfth year.
 
Commercial  banks,  savings and  loan  institutions, private  mortgage insurance
companies, mortgage  bankers, and  other secondary  market issuers  also  create
pass-through  pools of conventional residential mortgage loans. Such issuers may
in addition be the originators of the  underlying mortgage loans as well as  the
guarantors   of   the   pass-through  certificates.   Pools   created   by  such
non-governmental  issuers  generally  offer  a  higher  rate  of  interest  than
governmental  pools  because  there  are  no  direct  or  indirect  governmental
guarantees of payments in the former pools. However, timely payment of  interest
and  principal of these pools may be  supported by various forms of insurance or
guarantees, including individual  loan, title, pool,  and hazard insurance.  The
insurance  and guarantees are  issued by government  entities, private insurers,
and the mortgage poolers.
 
Fortis Series expects that governmental or private entities may create  mortgage
loan  pools  offering pass-through  investments in  addition to  those described
above. As new  types of  pass-through securities  are developed  and offered  to
investors, the Series may, consistent with their investment objectives, policies
and restrictions, consider making investments in such new types of securities.
 
Other  types of  mortgage-related securities  include debt  securities which are
secured, directly  or indirectly,  by  mortgages on  commercial real  estate  or
residential  rental properties,  or by  first liens  on residential manufactured
homes (as  defined  in  section  603(6) of  the  National  Manufactured  Housing
Construction  and Safety Standards Act of 1974), whether such manufactured homes
are considered real or personal property under  the laws of the states in  which
they are located.
 
Securities   in  this  investment  category   include,  among  others,  standard
mortgage-related bonds  and newer  collateralized mortgage  obligations  (CMOs).
Mortgage-related   bonds  are  secured  by   pools  of  mortgages,  but,  unlike
pass-through securities, payments to bondholders are not determined by  payments
on  the mortgages. The  bonds consist of  a single class,  with interest payable
monthly and  principal  payable on  the  stated  date of  maturity.  CMO's  have
characteristics  of  both  pass-through securities  and  mortgage-related bonds.
CMO's are secured by pools of  mortgages, typically in the form of  "guaranteed"
pass-through  certificates such as GNMA, FNMA, or FHLMC securities. The payments
on the  collateral securities  determine the  payments to  the bondholders,  but
there  is not  a direct  "pass-through" of  payments. CMO's  are structured into
multiple classes, each bearing a different date of maturity. Monthly payments of
principal received from the pool of underlying mortgages, including prepayments,
is first returned to  investors holding the  shortest maturity class.  Investors
holding  the longest maturity  classes receive principal  only after the shorter
maturity classes have been retired.
 
CMO's are issued by entities that  operate under orders from the Securities  and
Exchange  Commission (the SEC) exempting such issuers from the provisions of the
1940 Act. Until recently, the staff of the SEC had taken the position that  such
issuers  were investment  companies and that,  accordingly, an  investment by an
investment company (such as  the Series) in the  securities of such issuers  was
subject  to  limitations imposed  by Section  12  of the  1940 Act.  However, in
reliance on  a  recent  SEC  staff interpretation,  the  Series  may  invest  in
securities   issued  by  certain  "exempted   issuers"  without  regard  to  the
limitations of Section 12 of the 1940 Act. In its interpretation, the SEC  staff
defined  "exempted issuers"  as unmanaged, fixed  asset issuers  that (a) invest
primarily in mortgage-backed securities, (b) do not issue redeemable  securities
as  defined  in Section  2(a)(32) of  the  1940 Act,  (c) operate  under general
exemptive orders exempting them from "all provisions of the [1940] Act" and  (d)
are not registered or regulated under the 1940 Act as investment companies.
 
There  are many  classes of  CMOs. There  are IOs,  which entitle  the holder to
receive distributions consisting solely or primarily of all or a portion of  the
interest  in Mortgage Assets. There are also  "POs," which entitle the holder to
receive distributions consisting solely or primarily of all or a portion of  the
principal  of  the  underlying  pool  of  Mortgage  Assets.  In  addition, there
 
                                       36
<PAGE>
are "inverse  floaters," which  have a  coupon rate  that moves  in the  reverse
direction  to  an  applicable  index,  and accrual  (or  "Z")  bonds,  which are
described below.
 
As to IOs, POs, inverse floaters, and accrual bonds, not more than 5% of the net
assets of each of U.S. Government Securities Series, Diversified Income  Series,
Global  Bond Series,  High Yield Series,  Asset Allocation  Series, Global Asset
Allocation Series and International Stock Series will be invested in any one  of
these  items at any one time, and no more  than 10% of the net assets of each of
such series will be invested in all  such obligations at any one time. Not  more
than 5% of the Global Growth Series' net assets collectively will be invested in
such obligations at any time.
 
Inverse  floating CMOs are typically more volatile than fixed or adjustable rate
tranches of CMOs. Investments in inverse floating CMOs would be purchased by the
Series to attempt to  protect against a  reduction in the  income earned on  the
Series'  investments due  to a  decline in interest  rates. The  Series would be
adversely affected by the purchase of such  CMOs in the event of an increase  in
interest  rates since  the coupon rate  thereon will decrease  as interest rates
increase, and, like other mortgage-backed securities, the value will decrease as
interest rates increase.
 
The cash flows and yields  on IO and PO classes  are extremely sensitive to  the
rate  of principal  payments (including  prepayments) on  the related underlying
pool of mortgage  loans or mortgage-backed  securities ("Mortgage Assets").  For
example,  a rapid or slow rate of principal payments may have a material adverse
effect on the yield to maturity of  IOs or POs, respectively. If the  underlying
Mortgage  Assets experience  greater than anticipated  prepayments of principal,
the holder of an IO may incur substantial losses, even if the IO class is  rated
AAA.  Conversely,  if  the  underlying Mortgage  Assets  experience  slower than
anticipated prepayments of principal, the yield and market value for the  holder
of a PO will be affected more severely than would be the case with a traditional
Mortgage Backed Security.
 
However,  if interest  rates were  expected to  rise, the  value of  an IO might
increase and may partially offset other  bond value declines, and if rates  were
expected to fall, the inclusion of POs could balance lower reinvestment rates.
 
An accrual or "Z" bond holder is not entitled to receive cash payments until one
or  more other classes  of the CMO have  been paid in full  from payments on the
mortgage loans underlying the CMO. During the period in which cash payments  are
not  being made on the Z tranche, interest  accrues on the Z tranche at a stated
rate, and this accrued interest is added to the amount of principal which is due
to the holder of the Z tranche. After the other classes have been paid in  full,
cash  payments  are  made  on  the  Z  tranche  until  its  principal (including
previously accrued interest which  was added to  principal, as described  above)
and  accrued interest at the stated rate  have been paid in full. Generally, the
date upon which cash  payments begin to be  made on a Z  tranche depends on  the
rate  at which the mortgage loans underlying  the CMO are prepaid, with a faster
prepayment rate resulting in an earlier  commencement of cash payments on the  Z
tranche.  Like a zero coupon bond, during its  accrual period the Z tranche of a
CMO has the advantage of eliminating  the risk of reinvesting interest  payments
at  lower rates during a period of  declining market interest rates. At the same
time, however, and also like a zero coupon bond, the market value of a Z tranche
can be expected to fluctuate more  widely with changes in market interest  rates
than  would the market value of a tranche which pays interest currently. Changes
in market interest rates also can  be expected to influence prepayment rates  on
the  mortgage loans underlying the CMO of which  a Z tranche is a part. As noted
above, such  changes in  prepayment rates  will affect  the date  at which  cash
payments  begin to be made on a Z tranche, and therefore also will influence its
market value.
 
Investments in mortgage-related securities involve certain risks. In periods  of
declining  interest  rates,  prices of  fixed  income securities  tend  to rise.
However, during such  periods, the  rate of prepayment  of mortgages  underlying
mortgage-related  securities  tends  to  increase,  with  the  result  that such
prepayments must be reinvested  by the issuer at  lower rates. In addition,  the
value of such securities may fluctuate in response to the market's perception of
the  creditworthiness  of the  issuers of  mortgage-related securities  owned by
Fortis Series. Because investments  in mortgage-related securities are  interest
sensitive,  the ability of  the issuer to  reinvest or to  reinvest favorably in
underlying mortgages may be limited by government regulation or tax policy.  For
example, action by the Board of Governors of the Federal Reserve System to limit
the  growth of the  nation's money supply  may cause interest  rates to rise and
thereby reduce the volume of  new residential mortgages. Additionally,  although
mortgages  and mortgage-related securities are  generally supported by some form
of government or private guarantees and/or insurance, there is no assurance that
private guarantors or insurers will be able to meet their obligations.
 
SECURITIES OF FOREIGN COMPANIES
 
   
In  certain  countries,  governmental  restrictions  and  other  limitations  on
investment  may affect  the maximum  percentage of  equity ownership  in any one
company. In addition, in some instances  only special classes of securities  may
be  purchased by foreigners,  and the market prices,  liquidity, and rights with
respect to  those securities  may vary  from shares  owned by  nationals.  Money
Market  Series, U.S.  Government Securities  Series and  Asset Allocation Series
each may invest in securities of, or guaranteed by, the Government of Canada,  a
Province  of Canada, or any instrumentality  or political subdivision thereof in
an amount not  exceeding 25%  of the  value of  its total  assets. Money  Market
Series  and Asset Allocation Series each may  invest up to an additional 15% and
20%, respectively of its total assets in securities of foreign companies  (which
does  not include  domestic branches  of foreign  banks and  foreign branches of
domestic banks), provided  that no  more than  15% of  Asset Allocation  Series'
total  assets  may be  invested in  foreign  securities that  are not  traded on
national foreign securities exchanges or  traded in the United States.  However,
these  Series each may not invest more than 49% of the value of its total assets
collectively in: (i) securities of, or guaranteed by, the Government of  Canada,
a  Province of Canada, or any  instrumentality or political subdivision thereof;
(ii) securities of foreign companies; and (iii) securities of domestic  branches
of  foreign banks  and foreign  branches of  domestic banks.  High Yield Series,
Value Series, Growth & Income Series, Growth Stock Series, and Aggressive Growth
Series each may invest up  to 10% of its total  assets in securities of  foreign
governments  and companies.  The Small  Cap Value  Series may  invest in foreign
securities without limitation.
    
 
Investing in foreign securities may result in greater risk than that incurred by
investing in domestic securities. See "Risk Factors."
 
REPURCHASE AGREEMENTS
 
   
Each Series may invest  in repurchase agreements. A  repurchase agreement is  an
instrument under which securities are purchased from a bank or securities dealer
with  an agreement  by the  seller to  repurchase the  securities at  a mutually
agreed upon date, interest rate, and price. Generally, repurchase agreements are
of short duration--usually less than a week, but on occasion for longer periods.
Each of the Money Market Series, U.S. Government Securities Series,  Diversified
Income  Series,  Global  Bond  Series,  Asset  Allocation  Series,  Global Asset
Allocation Series, Growth Stock Series,  Global Growth Series and  International
Stock Series, will limit its investment in repurchase agreements with a maturity
of  more than  seven days to  10% of its  net assets (subject  to the collective
limitations regarding restricted  or illiquid  securities set  forth below).  In
investing  in repurchase agreements, a Series' risk is limited to the ability of
such bank or securities dealer to pay the agreed upon amount at the maturity  of
the  repurchase  agreement.  In the  opinion  of  management, such  risk  is not
    
 
                                       37
<PAGE>
material; if  the  other party  defaults,  the underlying  security  constitutes
collateral  for the  obligation to  pay--although the  Series may  incur certain
delays  in  obtaining  direct  ownership  of  the  collateral,  plus  costs   in
liquidating the collateral. In the event a bank or securities dealer defaults on
the  repurchase  agreement,  management  believes  that,  barring  extraordinary
circumstances, the Series will be entitled to sell the underlying securities  or
otherwise  receive  adequate protection  (as defined  in the  federal Bankruptcy
Code) for its interest in such securities. To the extent that proceeds from  any
sale upon a default were less than the repurchase price, the Series could suffer
a  loss. If  the Series  owns underlying securities  following a  default on the
repurchase agreement, the Series will be subject to risk associated with changes
in the market  value of  such securities. The  Series' custodian  will hold  the
securities underlying any repurchase agreement or such securities may be part of
the  Federal  Reserve Book  Entry  System. The  market  value of  the collateral
underlying the repurchase agreement will be determined on each business day.  If
at  any time the market value of the collateral falls below the repurchase price
of the repurchase agreement  (including any accrued  interest), the Series  will
promptly  receive additional collateral (so the total collateral is in an amount
at least equal  to the  repurchase price plus  accrued interest).  The Board  of
Directors   of  Fortis   Series  (the   "Board  of   Directors")  evaluates  the
creditworthiness of issuers which are securities dealers.
 
U.S. Government Securities  Series will  only execute  repurchase agreements  in
which  the  underlying security  meets the  criteria  of the  Series' investment
policies. U.S. Government  Securities Series will  limit transactions  involving
repurchase  agreements to domestic commercial banks and/or recognized dealers in
United States  government securities  believed by  Advisers to  present  minimum
credit risks.
 
REVERSE REPURCHASE AGREEMENTS
 
   
The  S&P  500 Index  Series  and Mid  Cap Stock  Series  may enter  into reverse
repurchase agreements  to  meet redemption  requests  where the  liquidation  of
portfolio   securities  is  deemed   by  such  Series   to  be  inconvenient  or
disadvantageous. Although Blue Chip Stock Series has no such current  intention,
in  the foreseeable  future, of  engaging in  reverse repurchase  agreements, it
reserves the  right  to  do  so.  Reverse  repurchase  agreements  are  ordinary
repurchase  agreements  in which  a Series  is  the seller  of, rather  than the
investor in, securities, and  agrees to repurchase them  at an agreed upon  time
and  price. Use of a reverse repurchase agreement may be preferable to a regular
sale and later  repurchase of the  securities because it  avoids certain  market
risks  and transaction costs. A reverse repurchase  agreement may be viewed as a
type of borrowing by the Series.
    
 
EXTENDIBLE NOTES
 
   
Money Market  Series, Global  Bond Series,  Global Asset  Allocation Series  and
Asset  Allocation Series each are permitted to invest  up to 25% of the value of
its total assets in extendible notes.  An extendible note is a debt  arrangement
under  which the  holder, at  its option,  may require  the issuer,  typically a
financial or an industrial concern, to  repurchase the note for a  predetermined
fixed  price at  one or more  times prior to  the ultimate maturity  date of the
note. Typically, an extendible note  is issued at an  interest rate that can  be
adjusted  at fixed times throughout its term.  At the same times as the interest
rate is adjusted by the  issuer, the holder of the  note is typically given  the
option  to "put" the note back to the  issuer at a predetermined price, e.g., at
100% of the outstanding  principal amount plus unpaid  accrued interest, if  the
extended interest rate is undesirable to the holder. This option to put the note
back to the issuer, i.e., to require the issuer to repurchase the note, provides
the  holder  with an  optional maturity  date  that is  shorter than  the actual
maturity date of the note.
    
 
Extendible notes are typically issued with maturity dates in excess of 13 months
from the date  of issuance.  If such extendible  notes provide  for an  optional
maturity date of 13 months or less, however, then such notes are deemed by these
Series  to have been issued for the shorter optional maturity date. Accordingly,
investment in  such  extendible notes  would  not  be in  contravention  of  the
investment  policy of the Series  not to invest in  securities having a maturity
date in  excess  of  13 months  from  the  date of  acquisition.  Investment  in
extendible  notes is  not expected  to have a  material impact  on the effective
portfolio maturity of these Series.
 
An investment in an  extendible note is  liquid, and the note  may be resold  to
another  investor prior to its  optional maturity date at  its market value. The
market value  of an  extendible note  with  a given  optional maturity  date  is
determined  and fluctuates in  a similar manner  to the market  value of a fixed
maturity note  with  a maturity  equivalent  to  the optional  maturity  of  the
extendible  note.  Compared to  fixed-term notes  of  the same  issuer, however,
extendible notes  with equivalent  optional  maturities generally  yield  higher
returns without a material increase in risk to the Series buying them.
 
   
The  creditworthiness of  the issuers of  the extendible notes  is monitored and
rated by Moody's and by S&P, and investments by these Series in such  extendible
notes are restricted to notes with the same investment ratings as are acceptable
to the Series with respect to other forms of investment. The creditworthiness of
such  issuers is  also monitored  by Advisers  (as well  as the  sub-adviser for
Global Bond Series and Global Asset Allocation Series).
    
 
DELAYED DELIVERY TRANSACTIONS
 
The purchase  of  securities  on  a when-issued,  delayed  delivery  or  forward
commitment basis exposes a Series to risk because the securities may decrease in
value  prior to their delivery. Purchasing  securities on a when-issued, delayed
delivery or  forward commitment  basis  involves the  additional risk  that  the
return available in the market when the delivery takes place will be higher than
that  obtained in the transaction itself.  These risks could result in increased
volatility of a Series' net asset value to the extent that the Series  purchases
securities  on a when-issued, delayed delivery or forward commitment basis while
remaining substantially fully invested.
 
DOLLAR ROLLS
 
In connection with  their ability  to purchase  securities on  a when-issued  or
forward  commitment basis, each Series other than Money Market Series and Growth
Stock Series may enter  into "dollar rolls" in  which a Series sells  securities
for  delivery in  the current month  and simultaneously contracts  with the same
counterparty to  repurchase similar  (same type,  coupon and  maturity) but  not
identical  securities on a specified future date. Each Series gives up the right
to receive principal  and interest paid  on the securities  sold. However,  each
Series  would benefit to the extent of any difference between the price received
for the securities sold and the lower forward price for the future purchase plus
any fee income  received. Unless  such benefits  exceed the  income and  capital
appreciation that would have been realized on the securities sold as part of the
dollar  roll, the use of this technique will diminish the investment performance
of each Series compared with what  such performance would have been without  the
use  of dollar rolls. Each Series will hold and maintain in a segregated account
until the settlement date cash or any security that is not considered restricted
or illiquid  in an  amount equal  to the  value of  the when-issued  or  forward
commitment  securities. The  benefits derived from  the use of  dollar rolls may
depend, among other  things, upon  Adviser's (or the  sub-adviser's) ability  to
predict interest rates correctly. There is no assurance that dollar rolls can be
successfully  employed. In addition, the  use of dollar rolls  by a Series while
remaining substantially  fully invested  increases the  amount of  each  Series'
assets  that are subject to  market risk to an amount  that is greater than each
Series' net asset value, which could result in increased volatility of the price
of each Series' shares.
 
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LENDING OF PORTFOLIO SECURITIES
 
   
Consistent with  applicable regulatory  requirements, Global  Bond Series,  High
Yield  Series, Global  Asset Allocation  Series, Value  Series, Growth  & Income
Series, S&P  500  Index Series,  Blue  Chip Stock  Series,  International  Stock
Series, Mid Cap Stock Series, Global Growth Series and Aggressive Growth Series,
may  lend their portfolio securities  (principally to broker-dealers) where such
loans are callable at any time and are continuously secured by collateral (cash,
U.S. government  securities,  certificates  of  deposit,  or  other  high-grade,
short-term  obligations or interest-bearing  cash equivalents) equal  to no less
than the market value, determined daily,  of the securities loaned. Such  Series
will  receive amounts equal  to dividends or interest  on the securities loaned.
These Series will also earn  income for having made  the loan. Such Series  will
limit  such lending to not more than 10% of the value of each such Series' total
assets and Global Growth Series will limit such lending to not more than 30%  of
the  value of its total assets (for  each such Series, including the amount lent
as well as the collateral securing  such loans). Where voting or consent  rights
with  respect to loaned securities pass  to the borrower, management will follow
the policy of calling the  loan, in whole or in  part as may be appropriate,  to
permit the exercise of such voting or consent rights if the issues involved have
a material effect on such Series investment in the securities loaned. Apart from
lending  its securities, investing in  repurchase agreements, and acquiring debt
securities,  as  described  in  the  Prospectus  and  Statement  of   Additional
Information, these Series will not make loans to other persons.
    
 
   
The  risks in lending portfolio securities,  as with other extensions of secured
credit, consist of possible delay in  receiving additional collateral or in  the
recovery  of the securities or possible loss  of rights in the collateral should
the borrower  fail financially.  Loans will  only  be made  to firms  deemed  by
Advisers  to be of good standing and will not be made unless, in the judgment of
Advisers, the consideration to be earned from such loans would justify the risk.
    
 
OPTIONS
 
   
As provided below, in order to protect  against declines in the value of  Series
securities  or increases in the costs of  securities to be acquired and in order
to increase the gross income of Global Growth Series, the Series may enter  into
transactions  in options on a  variety of instruments and  indices. The types of
instruments to be purchased  and sold are further  described in the Appendix  of
this  Statement of Additional  Information, which should  be read in conjunction
with the following sections.
    
 
   
OPTIONS ON  SECURITIES. Global  Bond  Series, High  Yield Series,  Global  Asset
Allocation Series, Value Series, Growth & Income Series, Blue Chip Stock Series,
International  Stock Series, Global  Growth Series and  Aggressive Growth Series
may write (sell) covered call and covered put options and purchase call and  put
options  on securities (provided that  International Stock Series and Aggressive
Growth Series will  write and  purchase options  only on  equity securities  and
Global Bond Series and High Yield Series will write and purchase options only on
debt securities). Where such Series write an option which expires unexercised or
is closed out by such Series at a profit, it will retain all or a portion of the
premium  received for the option, which will  increase its gross income and will
offset in part  the reduced value  of any such  Series' security underlying  the
option,  or the  increased cost  of such Series'  securities to  be acquired. In
contrast, however, if the  price of the underlying  security moves adversely  to
such  Series' position,  the option  may be  exercised and  such Series  will be
required to purchase or sell the underlying security at a disadvantageous price,
which may only be partially offset by the amount of the premium, if at all. Such
Series may also write combinations of put and call options on the same security,
known as "straddles." Such transactions  can generate additional premium  income
but also present increased risk.
    
 
Such  Series may  also purchase  put or call  options in  anticipation of market
fluctuations which may adversely affect the value of its portfolio or the prices
of securities that such Series wants to  purchase at a later date. In the  event
that  the expected market fluctuations occur, such  Series may be able to offset
the resulting adverse effect on its portfolio, in whole or in part, through  the
options  purchased.  The  premium  paid  for  a  put  or  call  option  plus any
transaction costs will reduce the benefit, if any, realized by such Series  upon
exercise  or liquidation of the option, and,  unless the price of the underlying
security changes  sufficiently, the  option  may expire  without value  to  such
Series.
 
FUTURES CONTRACTS AND OPTIONS ON FUTURES CONTRACTS
 
   
FUTURES   CONTRACTS.  Global  Bond  Series,  High  Yield  Series,  Global  Asset
Allocation Series, Blue Chip Stock  Series, International Stock Series, Mid  Cap
Stock  Series  and Global  Growth Series  may enter  into interest  rate futures
contracts. Global Bond  Series, Global  Asset Allocation  Series, Value  Series,
Growth  & Income Series, Blue Chip Stock Series, International Stock Series, Mid
Cap Stock Series, Global  Growth Series and Aggressive  Growth Series may  enter
into stock index futures contracts for hedging purposes. The Global Bond Series,
High  Yield  Series, Global  Asset Allocation  Series,  Blue Chip  Stock Series,
International Stock Series,  Global Growth Series  and Aggressive Growth  Series
may  also  enter  into  foreign currency  futures  contracts.  (Unless otherwise
specified, interest rate  futures contracts, stock  index futures contracts  and
foreign  currency  futures contracts  are collectively  referred to  as "Futures
Contracts.")
    
 
Purchases or  sales of  stock index  futures contracts  are used  to attempt  to
protect  current or intended stock investments  from broad fluctuations in stock
prices. Interest rate and  foreign currency futures  contracts are purchased  or
sold  to  attempt to  hedge against  the  effects of  interest or  exchange rate
changes on a Series' current or intended investments in fixed income or  foreign
securities.  In the event that an anticipated decrease in the value of a Series'
securities occurs  as a  result of  a general  stock market  decline, a  general
increase  in  interest  rates, or  a  decline  in the  dollar  value  of foreign
currencies in which portfolio securities are denominated, the adverse effects of
such changes may be offset, in whole or in part, by gains on the sale of Futures
Contracts. Conversely,  the  increased  cost  of  a  Series'  securities  to  be
acquired,  caused by a  general rise in  the stock market,  a general decline in
interest rates, or  a rise in  the dollar  value of foreign  currencies, may  be
offset,  in whole or  in part, by  gains on Futures  Contracts purchased by such
Series. The Series will incur brokerage fees when it purchases and sells Futures
Contracts, and it will be required to make and maintain margin deposits.
 
   
OPTIONS ON FUTURES CONTRACTS. The Global Bond Series, High Yield Series,  Global
Asset Allocation Series, Blue Chip Stock Series, Mid Cap Stock Series and Global
Growth  Series, may  purchase and  write options  to buy  or sell  interest rate
futures contracts. In addition,  the Global Asset  Allocation Series, Blue  Chip
Stock  Series, Global Growth  Series, International Stock  Series, Mid Cap Stock
Series, Value Series, Growth & Income Series, and Aggressive Growth Series,  may
purchase  and write  options on stock  index futures contracts.  The Global Bond
Series, High  Yield Series,  Global  Asset Allocation  Series, Blue  Chip  Stock
Series,  International Stock Series, Mid Cap  Stock Series, Global Growth Series
and Aggressive Growth Series may purchase and write options on foreign  currency
futures contracts. (Unless otherwise specified, options on interest rate futures
contracts,  options on  stock index  futures contracts,  and options  on foreign
currency futures contracts are collectively  referred to as "Options on  Futures
Contracts.")  Such investment  strategies will  be used as  a hedge  and not for
speculation.
    
 
Put and call  Options on  Futures Contracts  may be  traded by  the Global  Bond
Series,  High Yield Series,  Value Series, Growth &  Income Series, Global Asset
Allocation Series, Blue Chip Stock  Series, Global Growth Series,  International
Stock Series, and Aggressive Growth Series in order to
 
                                       39
<PAGE>
protect  against declines  in the  values of  such Series  securities or against
increases in the  cost of  securities to be  acquired. Purchases  of Options  on
Futures  Contracts may present less risk in hedging than the purchase or sale of
the underlying Futures  Contracts since  the potential  loss is  limited to  the
amount  of  the premium  plus  related transaction  costs.  The writing  of such
options, however,  does  not present  less  risk  than the  trading  of  futures
contracts  and will  constitute only a  partial hedge,  up to the  amount of the
premium received, and, if an option is exercised, these Series may suffer a loss
on the transaction.
 
FOREIGN CURRENCY FORWARD EXCHANGE CONTRACTS
 
For a discussion of foreign currency forward exchange contracts, see "Investment
Policies, Restrictions, and  Risks Applicable to  More Than One  Series--Foreign
Currency Forward Exchange Contracts" in the Prospectus.
 
   
OPTIONS ON FOREIGN CURRENCIES. The Global Bond Series, High Yield Series, Global
Asset  Allocation Series, Blue  Chip Stock Series, Mid  Cap Stock Series, Global
Growth Series,  International Stock  Series, and  Aggressive Growth  Series  may
purchase and write put and call options on foreign currencies for the purpose of
protecting  against declines in the dollar value of foreign portfolio securities
and against increases in the dollar  cost of foreign securities to be  acquired.
As  in the case of other types of  options, however, the writing of an option on
foreign currency will constitute only a partial  hedge, up to the amount of  the
premium received, and these Series could be required to purchase or sell foreign
currencies  at  disadvantageous exchange  rates,  thereby incurring  losses. The
purchase of an  option on  foreign currency  may constitute  an effective  hedge
against fluctuations in exchange rates, although, in the event of rate movements
adverse  to  such Series'  position, it  may  forfeit the  entire amount  of the
premium plus  related transaction  costs. As  in the  case of  foreign  currency
forward  exchange contracts,  certain options  on foreign  currencies are traded
over-the-counter and  involve risks  which may  not be  present in  the case  of
exchange-traded instruments.
    
 
SEGREGATED ACCOUNTS
 
To comply with the 1940 Act, a Series engaging in certain transactions involving
options,  futures, reverse  repurchase agreements, delayed  delivery and forward
contracts on foreign  currencies will  "cover" its positions  by establishing  a
segregated account. These segregated accounts will be established and maintained
with  the Fortis Series' custodian  and will contain only  liquid assets such as
cash, or any security that is not considered restricted or illiquid.
 
RESTRICTED OR ILLIQUID SECURITIES
 
   
As fundamental  policies,  each of  the  Money Market  Series,  U.S.  Government
Securities Series, Diversified Income Series, Asset Allocation Series and Growth
Stock  Series may invest  up to 5%,  and Global Growth  Series up to  10% of its
total assets (at the time of investment) in securities which such Series may not
be free to sell to the public  without registration under the Securities Act  of
1933  (or in the case  of Global Growth Series,  registered under the applicable
securities laws of the country in which such securities are traded) ("restricted
securities"). The Global Bond Series, High Yield Series, Global Asset Allocation
Series, Value Series, Growth  & Income Series, S&P  500 Index Series, Blue  Chip
Stock  Series, International Stock  Series, Mid Cap  Stock Series and Aggressive
Growth Series each have nonfundamental  policies prohibiting investment of  more
than   15%  of  their  respective  net  assets  in  illiquid  securities.  These
restrictions do  not  include  securities  which  may  be  resold  to  qualified
institutional  buyers in accordance  with the provisions of  Rule 144A under the
Securities Act of 1933 ("Rule 144A securities").
    
 
The staff of the Securities and Exchange Commission has taken the position  that
the  liquidity  of Rule  144A securities  in  the portfolio  of a  fund offering
redeemable securities is a question of fact  for a board of directors of such  a
fund  to determine,  based upon  a consideration  by such  board of  the readily
available trading markets and a review of any contractual restrictions. The  SEC
staff   also   acknowledges  that,   while   such  a   board   retains  ultimate
responsibility, it may delegate this function to the fund's investment  adviser.
At  the present time, it  is not possible to  predict with assurance exactly how
the market for  Rule 144A securities  will develop. A  Rule 144A security  which
when  purchased enjoyed a  fair degree of  marketability may subsequently become
illiquid, thereby adversely affecting the liquidity of the Series' portfolio.
 
WARRANTS OR RIGHTS
 
   
Warrants or rights may  be acquired by Global  Asset Allocation Series, S&P  500
Index  Series, International Stock Series and Global Growth Series in connection
with other securities or  separately and provide such  Series with the right  to
purchase  at a later date  other securities of the  issuer. Each of these Series
has undertaken that its investments in  warrants or rights, valued at the  lower
of  cost or market, will  not exceed 5% of  the value of its  net assets and not
more than 2% of such  assets will be invested in  warrants and rights which  are
not  listed on established  stock exchanges, such  as the London,  Tokyo, or New
York Stock Exchanges.  Warrants or rights  acquired by such  Series in units  or
attached  to securities will be  deemed to be without  value for purpose of this
restriction.
    
 
SHORT SALES AGAINST THE BOX
 
   
Each of Global Bond Series, High  Yield Series, Global Asset Allocation  Series,
Value  Series,  Growth &  Income Series,  S&P  500 Index  Series, Mid  Cap Stock
Series, International Stock Series, Global  Growth Series and Aggressive  Growth
Series  may sell a security to the  extent such Series contemporaneously owns or
has the right to obtain securities identical to those sold short without payment
of any additional consideration.  Such a short  sale is referred  to as a  short
sale  "against the box." The aggregate market value of the underlying securities
subject to all outstanding short  sales may not exceed 5%  of the net assets  of
the Series.
    
 
INVESTMENT RESTRICTIONS
 
Certain  investment restrictions are fundamental to  the operation of the Series
and may not be changed except with the approval of the holders of a majority  of
the  outstanding shares of  the Series affected. For  this purpose, "majority of
the  outstanding  voting  securities"  means  the  lesser  of  (i)  67%  of  the
outstanding shares of the affected Series present at the meeting of shareholders
if more than 50% of the outstanding shares of the affected Series are present in
person  or by  proxy, or  (ii) more than  50% of  the outstanding  shares of the
affected Series. For a discussion of  contract owner voting privileges, see  the
accompanying Prospectus pertaining to the Contract.
 
   
INVESTMENT  RESTRICTIONS  OF  MONEY MARKET  SERIES,  U.S.  GOVERNMENT SECURITIES
SERIES, DIVERSIFIED  INCOME SERIES,  ASSET ALLOCATION  SERIES AND  GROWTH  STOCK
SERIES. As a result of the following fundamental investment restrictions, except
as  otherwise  noted  below,  Money Market  Series,  U.S.  Government Securities
Series, Diversified  Income Series,  Asset Allocation  Series and  Growth  Stock
Series will not:
    
 
   (1)  Purchase securities on margin or  otherwise borrow money or issue senior
securities, except that  Diversified Income Series,  U.S. Government  Securities
Series  and  Asset  Allocation  Series,  in  accordance  with  their  investment
objectives and policies, may  purchase securities on  a when-issued and  delayed
delivery basis, within the limitations set forth in the Prospectus and Statement
of  Additional Information. Fortis Series may also obtain such short-term credit
as it needs for the clearance
 
                                       40
<PAGE>
of securities transactions, and may borrow from a bank, for the account of Money
Market Series,  U.S. Government  Securities Series,  Diversified Income  Series,
Asset  Allocation Series,  and Growth  Stock Series,  as a  temporary measure to
facilitate redemptions (but  not for  leveraging or investment)  an amount  that
does  not  exceed 10%  of  the value  of  the Series'  total  assets. Investment
securities will not be purchased for a Series while outstanding bank  borrowings
exceed 5% of the value of such Series' total assets.
 
   (2) Write, purchase or sell puts, calls or combinations thereof.
 
   (3)  Mortgage,  pledge or  hypothecate its  assets, except  in an  amount not
exceeding 10% of the value of its total assets to secure temporary or  emergency
borrowing.
 
   (4) Invest in commodities or commodity contracts.
 
   (5)  Act as  an underwriter  of securities  of other  issuers, except  to the
extent that, in connection with the disposition of portfolio securities,  Fortis
Series may be deemed an underwriter under applicable laws.
 
   (6)  Participate on a  joint or a  joint and several  basis in any securities
trading account.
 
   (7) Invest in real estate, except a Series may invest in securities issued by
companies owning real estate or interests therein.
 
   (8) Makes loans to other persons.  Repurchase agreements and the purchase  of
publicly  traded  debt obligations  are not  considered to  be "loans"  for this
purpose and may be entered into or purchased by a Series in accordance with  its
investment objectives and policies.
 
   (9)  Concentrate its investments in any  particular industry, except that (i)
it may invest  up to  25% of the  value of  its total assets  in any  particular
industry,  and  (ii)  there is  no  limitation  with respect  to  investments in
obligations issued or guaranteed by the United States Government or its agencies
and instrumentalities,  or  obligations  of domestic  commercial  banks.  As  to
utility  companies,  gas,  electric,  water  and  telephone  companies  will  be
considered as  separate  industries.  As to  finance  companies,  the  following
categories  will be  considered as  separate industries:  (a) captive automobile
finance, such as General  Motors Acceptance Corp. and  Ford Motor Credit  Corp.;
(b)  captive equipment finance companies,  such as Honeywell Finance Corporation
and General Electric Credit Corp.; (c) captive retail finance companies, such as
Macy Credit  Corp.  and  Sears  Roebuck  Acceptance  Corp.;  (d)  consumer  loan
companies,   such  as  Beneficial  Finance  Corporation  and  Household  Finance
Corporation; (e)  diversified finance  companies such  as CIT  Financial  Corp.,
Commercial  Credit Corporation and Borg Warner Acceptance Corp.; and (f) captive
oil finance companies, such  as Shell Credit, Inc.,  Mobil Oil Credit Corp.  and
Texaco Financial Services, Inc. [For purposes of this restriction, securities of
each foreign government will be considered a separate "industry".]
 
  (10)  Purchase from or  sell to any  officer, director, or  employee of Fortis
Series, or its adviser  or underwriter, or any  of their officers or  directors,
any securities other than shares of Fortis Series' common stock.
 
  (11)  Make short sales, except for sales "against the box." While a short sale
is made by selling a security the Series does not own, a short sale is  "against
the  box" to the extent that the  Series contemporaneously owns or has the right
to obtain securities identical to those sold short at no added cost.
 
  (12) Invest more than 5% of the value of its assets in restricted  securities.
(Securities  sold under Section  4(2) of the  Securities Act of  1933 (the "1933
Act") that are eligible for resale pursuant to Rule 144A under the 1933 Act that
have been determined to be  liquid by the Board  of Directors or the  investment
adviser  subject  to  the  oversight  of the  Board  of  Directors  will  not be
considered to  be  "restricted securities"  and  will  not be  subject  to  this
limitation.)
 
   
The  following  non-fundamental investment  restrictions may  be changed  by the
Board of  Directors  without shareholder  approval.  Money Market  Series,  U.S.
Government Securities Series, Diversified Income Series, Asset Allocation Series
and Growth Stock Series will not:
    
 
   (1) Purchase securities of other investment companies.
 
   (2) Invest in a company for the purposes of exercising control or management.
 
   (3)  Buy or sell  foreign exchange, except  as incidental to  the purchase or
sale of permissible foreign investments.
 
   (4) Investment in securities  which would expose  such Series to  liabilities
exceeding the amount invested.
 
   (5)  Invest in  interests (including partnership  interests) in  oil, gas, or
other mineral exploration  or development  programs, except it  may purchase  or
sell  securities issued by  corporations engaging in oil,  gas, or other mineral
exploration or development business.
 
   (6) Purchase or  retain the securities  of any issuer  if those officers  and
directors   of  Fortis  Series  or  its  investment  adviser  owning  (including
beneficial ownership) individually more than 1/2 of 1% of the securities of such
issuer together  own  (including  beneficial  ownership) more  than  5%  of  the
securities of such issuer.
 
   (7)  Invest more than an aggregate of 10% of the value of its total assets in
restricted securities (both  debt and  equity) or  in equity  securities of  any
issuer  which are not readily marketable. (Securities sold under Section 4(2) of
the 1933 Act that are eligible for  resale pursuant to Rule 144A under the  1933
Act  that have  been determined to  be liquid by  the Board of  Directors or the
investment adviser subject to the oversight  of the Board of Directors will  not
be considered to be "restricted securities" or "debt or equity securities of any
issuer  which  are not  readily  marketable" and  will  not be  subject  to this
limitation.)
 
   
INVESTMENT RESTRICTIONS  OF HIGH  YIELD SERIES,  VALUE SERIES,  GROWTH &  INCOME
SERIES  AND AGGRESSIVE GROWTH  SERIES. As a result  of the following fundamental
investment restrictions, except  as otherwise  noted below,  High Yield  Series,
Growth & Income Series and Aggressive Growth Series will not:
    
 
   (1)  Concentrate its investments in any  particular industry, except that (i)
it may invest  up to  25% of the  value of  its total assets  in any  particular
industry,  and  (ii)  there is  no  limitation  with respect  to  investments in
obligations issued or guaranteed by the United States Government or its agencies
and instrumentalities,  or  obligations  of domestic  commercial  banks.  As  to
utility  companies,  gas,  electric,  water  and  telephone  companies  will  be
considered as  separate  industries.  As to  finance  companies,  the  following
categories  will be  considered as  separate industries:  (a) captive automobile
finance, such as General  Motors Acceptance Corp. and  Ford Motor Credit  Corp.;
(b)  captive equipment finance companies,  such as Honeywell Finance Corporation
and General Electric Credit Corp.; (c) captive retail finance companies, such as
Macy Credit  Corp.  and  Sears  Roebuck  Acceptance  Corp.;  (d)  consumer  loan
companies,   such  as  Beneficial  Finance  Corporation  and  Household  Finance
Corporation; (e)  diversified finance  companies such  as CIT  Financial  Corp.,
Commercial  Credit Corporation and Borg Warner Acceptance Corp.; and (f) captive
oil finance companies, such  as Shell Credit, Inc.,  Mobil Oil Credit Corp.  and
Texaco Financial Services, Inc.
 
   (2)  Purchase or sell physical commodities  (such as grains, livestock, etc.)
or futures or options  contracts thereon. However, it  may purchase or sell  any
forms of financial instruments or contracts that might be deemed commodities.
 
   (3)  Invest directly in real estate or interests in real estate; however, the
Series  may  invest  in  interests  in  real  estate  investment  trusts,   debt
 
                                       41
<PAGE>
securities  secured  by real  estate  or interests  therein,  or debt  or equity
securities issued by companies which invest in real estate or interests therein.
 
   (4) Mortgage, pledge, hypothecate, or in any manner transfer, as security for
indebtedness, any securities  owned or held  by the Series,  provided that  this
restriction shall not apply to the transfer of securities in connection with any
permissible   borrowing  or  to  collateral   arrangements  in  connection  with
permissible activities.
 
   (5) Act  as an  underwriter of  securities of  other issuers,  except to  the
extent  that, in  connection with the  disposition of  portfolio securities, the
Series may be deemed an underwriter under applicable laws.
 
   (6) Purchase securities on margin, except that the Series, in accordance with
its  investment  objectives   and  policies,  may   purchase  securities  on   a
when-issued,  delayed delivery or forward commitment  basis. The Series may also
obtain such  short-term credit  as  it needs  for  the clearance  of  securities
transactions and may make margin deposits in connection with futures contracts.
 
   (7)  Make short sales, except for sales "against the box." While a short sale
is made by selling a security the Series does not own, a short sale is  "against
the  box" to the  extent the Series  contemporaneously owns or  has the right to
obtain  securities  identical  to  those  sold  short  without  payment  of  any
additional consideration.
 
   (8)  Make  loans to  other  persons, except:  (i)  each Series  may  lend its
portfolio securities in  an amount not  to exceed 33  1/3% of the  value of  its
total  assets if  such loans  are secured  by collateral  equal to  at least the
market value of  the securities  lent, provided  that such  collateral shall  be
limited  to cash, securities issued or guaranteed  by the U.S. Government or its
agencies or  instrumentalities, certificates  of  deposit or  other  high-grade,
short-term  obligations or  interest-bearing cash  equivalents; and  (ii) it may
purchase debt securities through  private placements (restricted securities)  in
accordance with the Series' investment objectives and policies.
 
   (9)  Issue senior securities (as  defined in the 1940  Act) other than as set
forth in restriction #10 below and except  to the extent that using options  and
futures  contracts or purchasing or selling securities on a when issued, delayed
delivery or  forward  commitment basis  (including  the entering  into  of  roll
transactions) may be deemed to constitute issuing a senior security.
 
  (10) Borrow money except from banks for temporary or emergency purposes not in
excess  of 33 1/3% of the value of the Series' total assets. The Series will not
purchase securities while borrowings  (including "roll" transactions) in  excess
of  5% of total assets are outstanding. In the event that the asset coverage for
the Series' borrowings falls  below 300%, the Series  will reduce, within  three
days  (excluding Sundays and holidays), the amount of its borrowings in order to
provide for 300% asset coverage.
 
   
The following  non-fundamental investment  restrictions may  be changed  by  the
Board  of  Directors  without  shareholder approval.  High  Yield  Series, Value
Series, Growth & Income Series and Aggressive Growth Series will not:
    
 
   (1) Invest more than  5% of the  value of its total  assets in securities  of
other  investment companies, except in  connection with a merger, consolidation,
acquisition, or reorganization; provided that  the Series shall not purchase  or
otherwise  acquire more  than 3%  of the total  outstanding voting  stock of any
other investment company.  (Since each  Series indirectly absorbs  its pro  rata
share of the other investment companies' expenses through the return received on
these  securities, "double" investment advisory fees in effect are paid on those
portfolio assets  invested in  shares of  other investment  companies.  However,
management  believes that  at times the  return and liquidity  features of these
securities will be more beneficial to the Series than other types of securities,
and that the indirect absorption  of these expenses has  a de minimis effect  on
the Series' return.)
 
   (2) Invest in a company for the purposes of exercising control or management.
 
   (3)  Invest in interests (including partnership  interests or leases) in oil,
gas, or other mineral exploration or development programs, except the Series may
purchase or sell  securities issued  by corporations  engaging in  oil, gas,  or
other mineral exploration or development business.
 
   (4)  Purchase or retain  the securities of  any issuer if  those officers and
directors  of  Fortis  Series  or  its  investment  adviser  owning   (including
beneficial ownership) individually more than 1/2 of 1% of the securities of such
issuer  together  own  (including  beneficial ownership)  more  than  5%  of the
securities of such issuer.
 
   (5) Invest  more  than  15% of  its  net  assets in  all  forms  of  illiquid
investments,  as  determined  pursuant  to  applicable  Securities  and Exchange
Commission rules and interpretations.
 
   (6) Enter  into any  options, futures,  or forward  contract transactions  if
immediately  thereafter (a) the amount of premiums paid for all options, initial
margin deposits on all  futures contracts and/or  options on futures  contracts,
and  collateral deposited with  respect to forward contracts  held by or entered
into by the  Series would  exceed 5% of  the value  of the total  assets of  the
Series  or (b)  the Series'  assets covering,  subject to,  or committed  to all
options, futures, and  forward contracts would  exceed 20% of  the value of  the
total  assets  of the  Series. (This  restriction does  not apply  to securities
purchased on a when-issued, delayed delivery, or forward commitment basis.)
 
   (7) Invest in real estate limited partnership interests.
 
   (8) Purchase  the securities  of any  issuer  if such  purchase at  the  time
thereof  would cause more than 10% of the  voting securities of any issuer to be
held by the Series.
 
   (9) Borrow money except  for borrowings up  to 25% of  its total assets  when
borrowing  is necessary  to meet redemptions.  ("Roll" transactions  will not be
considered borrowing for purposes of this restriction).
 
  (10) Lend its portfolio securities in an amount in excess of 10% of its  total
assets.
 
  (11) Invest in the aggregate more than 10% of its total assets in put and call
options, futures contracts, and derivative instruments on securities.
 
   
INVESTMENT  RESTRICTIONS OF GLOBAL  GROWTH SERIES. As a  result of the following
fundamental investment restrictions, Global Growth Series will not:
    
 
   (1) Concentrate its  investments, that is,  invest 25% or  more of its  total
assets in any particular industry.
 
   (2)  Buy  or  sell  commodities  or  commodity  contracts,  including futures
contracts, other than  within the limitations  set forth in  the Prospectus  and
Statement of Additional Information.
 
   (3)  Purchase  or sell  real estate  or  other interests  in real  estate, or
interests in real estate  investment trusts; however,  the Global Growth  Series
may  invest in debt  securities secured by  real estate or  interests therein or
issued by corporations which invest in real estate or interests.
 
   
   (4) Mortgage, pledge, hypothecate, or in any manner transfer, as security for
indebtedness, any securities  owned or  held by Global  Growth Series,  provided
that  this  restriction  shall  not  apply  to  the  transfer  of  securities in
connection with  any  permissible borrowing  or  to collateral  arrangements  in
connection with permissible activities.
    
 
   
   (5)  Act as  an underwriter  of securities  of other  issuers, except  to the
extent that, in connection with the disposition of portfolio securities,  Global
Growth Series may be deemed an underwriter under applicable laws and except that
Global   Growth   Series  may   invest  up   to   10%  of   the  value   of  its
    
 
                                       42
<PAGE>
assets (at time of investment) in portfolio securities which are not  registered
under the applicable securities laws of the country in which such securities are
traded and for which no alternative market is readily available (such securities
are  referred  to herein  as  "restricted securities").  (Securities  sold under
Section 4(2) of the 1933 Act that are eligible for resale pursuant to Rule  144A
under  the 1933  Act that  have been  determined to  be liquid  by the  Board of
Directors or the  investment adviser subject  to the oversight  of the Board  of
Directors  will not be considered to be  "restricted securities" and will not be
subject to this limitation.)
 
   
   (6) Purchase  securities on  margin,  except that  Global Growth  Series,  in
accordance  with its investment objectives and policies, may purchase securities
on a  when-issued, delayed  delivery  or forward  commitment basis,  within  the
limitations set forth in the Prospectus and Statement of Additional Information.
Global  Growth Series may also obtain such short-term credit as it needs for the
clearance of securities transactions and may make margin deposits in  connection
with futures contracts.
    
 
   (7)  Make short sales, except for sales "against the box." While a short sale
is made by selling  a security the  Global Growth Series does  not own, a  short
sale   is  "against   the  box"   to  the   extent  the   Global  Growth  Series
contemporaneously owns or has the right to obtain securities identical to  those
sold short without payment of any additional consideration.
 
   (8)  Make  loans  to  other  persons, except  that  it  may  purchase readily
marketable bonds, debentures, or other debt securities, whether or not  publicly
distributed,  enter  into repurchase  agreements,  and make  loans  of portfolio
securities to an aggregate of 30% of the value of its total assets, measured  at
the time any such loan is made.
 
   
   (9)  Issue senior securities,  except that Global  Growth Series may purchase
securities on a when-issued,  delayed delivery or  forward commitment basis  and
enter  into roll transactions and other  transactions within the limitations set
forth in the  Prospectus and Statement  of Additional Information  which may  be
deemed to constitute borrowing.
    
 
   
  (10) Borrow money except from banks for temporary or emergency purposes not in
excess of 33 1/3% of the value of the Series' total assets. Global Growth Series
will not purchase securities while borrowings (including "roll" transactions) in
excess  of  5% of  total assets  are outstanding.  In the  event that  the asset
coverage for the Series' borrowings falls below 300%, Global Growth Series  will
reduce,  within three days  (excluding Sundays and holidays),  the amount of its
borrowings in order to provide for 300% asset coverage.
    
 
   
The following  non-fundamental investment  restrictions may  be changed  by  the
Board of Directors without shareholder approval. Global Growth Series will not:
    
 
   
   (1)  Invest more than  5% of the value  of its total  assets in securities of
other investment companies, except in  connection with a merger,  consolidation,
acquisition,  or reorganization; provided that the  Series shall not purchase or
otherwise acquire more  than 3%  of the total  outstanding voting  stock of  any
other  investment company.  (Since the  Series indirectly  absorbs its  pro rata
share of the other investment companies' expenses through the return received on
these securities, "double" investment advisory fees in effect are paid on  those
portfolio  assets  invested in  shares of  other investment  companies. However,
management believes that  at times the  return and liquidity  features of  these
securities  will be more beneficial to Global  Growth Series than other types of
securities, and that the indirect absorption of these expenses has a de  minimis
effect on the Series' return.)
    
 
   (2) Invest in a company for the purposes of exercising control or management.
 
   (3)  Invest in interests (including partnership  interests or leases) in oil,
gas, or other  mineral exploration  or development programs,  except the  Global
Growth Series may purchase or sell securities issued by corporations engaging in
oil, gas, or other mineral exploration or development business.
 
   (4)  Purchase or retain  the securities of  any issuer if  those officers and
directors  of  Fortis  Series  or  its  investment  adviser  owning   (including
beneficial ownership) individually more than 1/2 of 1% of the securities of such
issuer  together  own  (including  beneficial ownership)  more  than  5%  of the
securities of such issuer.
 
   (5) Invest more than 5% of its  total assets in equity securities of  issuers
which  are not  readily marketable. (Securities  sold under Section  4(2) of the
1933 Act that are eligible for resale  pursuant to Rule 144A under the 1933  Act
that  have  been  determined to  be  liquid by  the  Board of  Directors  or the
investment adviser subject to the oversight  of the Board of Directors will  not
be  considered  to  be  "equity  securities of  issuers  which  are  not readily
marketable" and will not be subject to this limitation.)
 
   (6) Invest more than an aggregate of 10% of the value of its total assets  in
(a) restricted securities (both debt and equity) or in debt or equity securities
of any issuer which are not readily marketable; (b) repurchase agreements with a
maturity  of more than  seven days; and (c)  over-the-counter option and futures
contracts; provided further, that the Series will not invest more than 5% of its
total assets in restricted  securities. (Securities sold  under Section 4(2)  of
the  1933 Act that are eligible for resale  pursuant to Rule 144A under the 1933
Act that have been determined to be liquid by the Board of Directors or Advisers
subject to the oversight of the Board of Directors will not be considered to  be
"restricted  securities" or "debt  or equity securities of  any issuer which are
not readily marketable" and will not be subject to this limitation.)
 
   (7) Enter  into any  options, futures,  or forward  contract transactions  if
immediately  thereafter (a) the amount of premiums paid for all options, initial
margin deposits on all  futures contracts and/or  options on futures  contracts,
and  collateral deposited with  respect to forward contracts  held by or entered
into by the  Series would  exceed 5% of  the value  of the total  assets of  the
Series  or (b)  the Series'  assets covering,  subject to,  or committed  to all
options, futures, and  forward contracts would  exceed 20% of  the value of  the
total  assets  of the  Series. (This  restriction does  not apply  to securities
purchased on a when-issued, delayed delivery, or forward commitment basis.)
 
   (8) Invest in real estate limited partnership interests.
 
   (9) Purchase  the securities  of any  issuer  if such  purchase at  the  time
thereof  would cause more than 10% of the  voting securities of any issuer to be
held by the Series.
 
  (10) Borrow money in excess of 10% of its total assets, except as a  temporary
or  emergency measure. ("Roll" transactions will not be considered borrowing for
purposes of this restriction).
 
   
INVESTMENT RESTRICTIONS OF  GLOBAL BOND SERIES,  GLOBAL ASSET ALLOCATION  SERIES
AND  INTERNATIONAL  STOCK  SERIES.  As a  result  of  the  following fundamental
investment restrictions, Global Bond Series, Global Asset Allocation Series  and
International Stock Series, will not:
    
 
   (1) Concentrate its investments in any particular industry, except that (i) a
Series  may invest up to 25% of the  value of its total assets in any particular
industry, and  (ii)  there is  no  limitation  with respect  to  investments  in
obligations issued or guaranteed by the United States government or its agencies
and  instrumentalities,  or  obligations  of domestic  commercial  banks.  As to
utility  companies,  gas,  electric,  water  and  telephone  companies  will  be
considered  as  separate  industries.  As to  finance  companies,  the following
categories will be  considered as  separate industries:  (a) captive  automobile
finance,  such as General  Motors Acceptance Corp. and  Ford Motor Credit Corp.;
(b) captive equipment finance companies,  such as Honeywell Finance  Corporation
and General Electric Credit Corp.; (c) captive retail finance companies, such as
Macy Credit Corp. and Sears
 
                                       43
<PAGE>
Roebuck  Acceptance  Corp.;  (d)  consumer loan  companies,  such  as Beneficial
Finance Corporation and Household  Finance Corporation; (e) diversified  finance
companies,  such as CIT Financial Corp.,  Commercial Credit Corporation and Borg
Warner Acceptance Corp.; and  (f) captive oil finance  companies, such as  Shell
Credit,  Inc., Mobil Oil  Credit Corp. and Texaco  Financial Services, Inc. [For
purposes of this restriction,  securities of each  foreign government or  agency
thereof will be considered separate "industries".]
 
   (2)  Purchase or  sell physical  commodities (such  as grains,  livestock, et
cetera) or futures or options contracts thereon; however, a Series may  purchase
or  sell any forms  of financial instruments  or contracts that  might be deemed
commodities.
 
   (3) Invest directly in  real estate or interests  in real estate; however,  a
Series may invest in interests in real estate investment trusts, debt securities
secured by real estate or interests therein, or debt or equity securities issued
by companies that invest in real estate or interests therein.
 
   (4)  Act as  an underwriter  of securities  of other  issuers, except  to the
extent that,  in connection  with  the disposition  of portfolio  securities,  a
Series may be deemed an underwriter under applicable laws.
 
   (5)  Purchase securities on  margin or otherwise borrow  money, except that a
Series, in accordance with its investment objectives and policies, may  purchase
securities  on a when-issued, delayed delivery  or forward commitment basis, and
may make margin deposits  in connection with dealing  in commodities or  options
thereon.  A Series also  may obtain such  short-term credit as  it needs for the
clearance of securities transactions, and may borrow from a bank an amount  that
does  not exceed 33 1/3% of  the value of a Series'  total assets. A Series will
not purchase investment securities while outstanding bank borrowings  (including
"roll"  transactions) in excess of 5% of its total assets are outstanding in the
event that the asset  coverage for a Series'  borrowings falls below 300%,  such
Series  will reduce,  within three  days (excluding  Sundays and  holidays), the
amount of its borrowings in order to provide for 300% asset coverage.
 
   (6) Make loans to other persons, except that a Series may lend its  portfolio
securities  in an amount not to exceed 33  1/3% of the value of its total assets
(including the amount lent  as well as the  collateral securing such loans),  if
such  loans are secured by collateral at least  equal to the market value of the
securities lent,  provided  that  such  collateral shall  be  limited  to  cash,
government  securities, certificates of deposit  or other high-grade, short-term
obligations  or   interest-bearing   cash  equivalents   (including   repurchase
agreements  pertaining to  such securities or  obligations). Loans  shall not be
deemed to include  repurchase agreements  or the  purchase or  acquisition of  a
portion  of  an issue  of  notes, bonds,  debentures  or other  debt securities,
whether or not such purchase or  acquisition is made upon the original  issuance
of the securities.
 
   (7)  Issue senior securities (as  defined in the 1940  Act) other than as set
forth in restriction 5 concerning borrowing and except to the extent that  using
options  and  futures  contracts  or  purchasing  or  selling  securities  on  a
when-issued,  delayed  delivery  or  forward  commitment  basis  (including  the
entering into of roll transactions) may be deemed to constitute issuing a senior
security.
 
   
The  following  non-fundamental investment  restrictions may  be changed  by the
Board of  Directors without  shareholder approval.  Global Bond  Series,  Global
Asset Allocation Series and International Stock Series will not:
    
 
   (1)  Invest more than  5% of the value  of its total  assets in securities of
other investment companies, except in  connection with a merger,  consolidation,
acquisition  or  reorganization;  provided  that  no  Series  shall  purchase or
otherwise acquire more  than 3%  of the total  outstanding voting  stock of  any
other  investment company. (Since a Series indirectly absorbs its pro rata share
of the other investment companies' expenses through the return received on these
securities, "double"  investment  advisory fees  in  effect are  paid  on  those
portfolio  assets  invested in  shares of  other investment  companies. However,
management believes that  at times the  return and liquidity  features of  these
securities  could be more beneficial to a Series than other types of securities,
and that the indirect absorption  of these expenses has  a de minimis effect  on
the Series' return.)
 
   (2) Invest in a company for the purposes of exercising control or management.
 
   (3)  Invest in interests (including partnership  interests or leases) in oil,
gas or other mineral exploration or development programs, except it may purchase
or sell securities issued by corporations engaging in oil, gas or other  mineral
exploration or development business.
 
   (4)  Purchase or retain  the securities of  any issuer if  those officers and
directors  of  Fortis  Series  or  its  investment  adviser  owning   (including
beneficial ownership) individually more than 1/2 of 1% of the securities of such
issuer  together  own  (including  beneficial ownership)  more  than  5%  of the
securities of such issuer.
 
   
   (5) Invest  more  than  15% of  the  value  of its  net  assets  in  illiquid
securities,   as  determined   pursuant  to  applicable   Commission  rules  and
interpretations. Securities that have been determined to be liquid by the  Board
of  Directors,  or  by  Advisers  subject to  the  oversight  of  such  Board of
Directors, will not be subject to this limitation.
    
 
   (6) Enter  into any  options,  futures or  forward contract  transactions  if
immediately  thereafter the  amount of  premiums paid  for all  options, initial
margin deposits on all  futures contracts and/or  options on futures  contracts,
and  collateral deposited with  respect to forward contracts  held by or entered
into by such Series  would exceed 5% of  the value of the  total assets of  such
Series.   (This  restriction  does  not  apply  to  securities  purchased  on  a
when-issued, delayed delivery or forward commitment basis.)
 
   (7) Make  short sales,  except for  sales "against  the box"  and except  for
foreign  currency  forward  exchange  contracts  for  hedging  or  cross-hedging
purposes.
 
   (8) Mortgage,  pledge  or  hypothecate  its  assets,  except  to  the  extent
necessary  to secure permitted borrowings and except for collateral arrangements
in connection with permissible activities.
 
   (9) Purchase  the securities  of any  issuer  if such  purchase at  the  time
thereof  would cause more than 10% of the  voting securities of any issuer to be
held by the Series.
 
  (10) Borrow money  except for borrowing  up to  25% of its  total assets  when
borrowing  is  necessary to  meet  redemptions temporary  or  emergency measure.
("Roll" transactions  will not  be  considered borrowing  for purposes  of  this
restriction.)
 
  (11)  Lend its portfolio securities in an amount in excess of 10% of its total
assets.
 
   
  (12) Invest in the aggregate more than 10% of its total assets in put and call
options, futures contracts, and derivative instruments on securities.
    
 
   
INVESTMENT RESTRICTIONS OF S&P 500 INDEX SERIES  AND MID CAP STOCK SERIES. As  a
result  of  the following  fundamental  investment restrictions,  S&P  500 Index
Series and Mid Cap Stock Series will not:
    
 
   (1) Purchase any securities which would cause  more than 25% of the value  of
the  Series' total  assets at the  time of such  purchase to be  invested in the
securities of one or more issuers  conducting their principal activities in  the
same industry. (For purposes of this limitation, U.S. Government securities, and
state  or  municipal  governments  and  their  political  subdivisions,  are not
considered members of any industry. In addition, this limitation does not  apply
to  investments in domestic banks, including  U.S. branches of foreign banks and
foreign branches of U.S. banks).
 
                                       44
<PAGE>
   (2) Borrow money or issue senior securities as defined in the 1940 Act except
that (a) the Series may borrow money in an amount not exceeding one-third of the
Series' total assets at  the time of  such borrowings. The  purchase or sale  of
futures  contracts and  related options shall  not be considered  to involve the
borrowing of money or issuance of senior securities.
 
   (3) Make loans or lend securities, if as a result thereof more than one-third
of the Series' total assets would be subject to all such loans. For purposes  of
this  limitation debt instruments and repurchase agreements shall not be treated
as loans.
 
   (4) Purchase or sell real estate unless acquired as a result of ownership  of
securities  or other  instruments (but  this shall  not prevent  the Series from
investing in securities or  other instruments backed  by real estate,  including
mortgage  loans, or securities of companies  that engage in real estate business
or invest or deal in real estate or interests therein).
 
   (5) Underwrite securities issued  by any other person,  except to the  extent
that  the purchase  of securities  and later  disposition of  such securities in
accordance with the Series' investment program may be deemed an underwriting.
 
   (6) Purchase  or sell  commodities  except that  the  Series may  enter  into
futures  contracts  and related  options, forward  currency contracts  and other
similar instruments.
 
   
The following  non-fundamental investment  restrictions may  be changed  by  the
Board  of Directors without  shareholder approval. S&P 500  Index Series and Mid
Cap Stock Series will not:
    
 
   
   (1) Sell  securities  short,  unless it  owns  or  has the  right  to  obtain
securities  equivalent  in kind  and amount  to the  securities sold  short, and
provided that transactions  in futures  contracts are not  deemed to  constitute
selling short.
    
 
   
   (2)  Purchase securities  on margin, except  that the Series  may obtain such
short-term credits  as are  necessary  for the  clearance of  transactions,  and
provided  that margin payments in connection  with futures contracts and options
on futures contracts shall not constitute purchasing securities on margin.
    
 
   
   (3) Purchase oil, gas or mineral leases.
    
 
   
   (4) Invest  more  than  15% of  the  value  of its  net  assets  in  illiquid
securities,  including repurchase agreements with remaining maturities in excess
of seven days, time deposits with maturities  in excess of seven days and  other
securities  which are not  readily marketable. For  purposes of this limitation,
illiquid securities shall not  include Section 4(2)  paper and securities  which
may  be resold under Rule  144A under the Securities  Act of 1933, provided that
the Board of  Directors, or its  delegate, determines that  such securities  are
liquid based upon the trading markets for the specific security.
    
 
   
   (5) Invest in securities of other investment companies, except as they may be
acquired  as part of a merger, consolidation or acquisition of assets and except
to the extent otherwise permitted by the 1940 Act.
    
 
   
   (6) Purchase any security while borrowings  representing more than 5% of  the
Fund's total assets are outstanding.
    
 
   
   (7)  Purchase warrants if at  the time of such purchase:  (a) more than 5% of
the value of the Series' assets would be invested in warrants, or (b) more  than
2% of the value of the Series' assets would be invested in warrants that are not
listed  on  the  New York  or  American  Stock Exchange  (for  purposes  of this
limitation, warrants acquired by the Series  in units or attached to  securities
will be deemed to have no value).
    
 
   
   (8)  Purchase puts, calls, straddles, spreads  and any combination thereof if
by reason  thereof the  value of  its aggregate  investment in  such classes  of
securities  would exceed 5% of its total assets except that: (a) this limitation
shall not apply to standby commitments, and (b) this limitation shall not  apply
to the Series' transactions in futures contracts and related options.
    
 
   
   (9)  Invest more than  25% of the value  of its total assets,  at the time of
such purchase, in domestic banks, including  U.S. branches of foreign banks  and
foreign branches of U.S. banks.
    
 
   
  (10)  Lend its portfolio securities in an amount in excess of 10% of its total
assets.
    
 
   
  (11) Borrow money except  for borrowings up  to 25% of  its total assets  when
borrowing is necessary to meet redemptions.
    
 
   
  (12) Invest in the aggregate more than 10% of its total assets in put and call
options, futures contracts, and derivative instruments on securities.
    
 
   
  (13) Invest in a company for the purposes of exercising control or management.
    
 
   
Each  of S&P 500 Index Series and Mid Cap Stock Series engages, except as noted,
in the following practices in furtherance of its investment objective:
    
 
   
LOANS OF FUND SECURITIES. The Series have authority to lend portfolio securities
provided (1) the loan is secured  continuously by collateral consisting of  U.S.
Government  securities  or cash  or cash  equivalents adjusted  daily to  make a
market value at  least equal  to the current  market value  of these  securities
loaned;  (2) the Series may at any time  call the loan and regain the securities
loaned; (3) the Series will receive any interest or dividends paid on the loaned
securities; and (4) the aggregate market value of securities loaned will not  at
any  time exceed one-third of the total assets of the Series. In addition, it is
anticipated that  the Series  may share  with the  borrower some  of the  income
received  on the collateral for the  loan or that it will  be paid a premium for
the loan. In determining  whether to lend securities,  the Series considers  all
relevant  factors  and  circumstances  including  the  creditworthiness  of  the
borrower.
    
 
FUTURES CONTRACTS AND OPTIONS. For the  purpose of creating market exposure  for
uncommitted   cash   balances,  reducing   transaction  costs   associated  with
rebalancing the  Series,  facilitating  trading  or  seeking  higher  investment
returns  when a futures contract is priced more attractively than the underlying
security or  the  index  of  the  Series, the  Series  may  enter  into  futures
contracts,  options, and options on futures contracts with respect to securities
in which the Series may invest and indices comprised of such securities.
 
RESTRICTIONS ON THE USE  OF FUTURES CONTRACTS AND  OPTIONS. The Series will  not
enter  into futures  contracts to  the extent  that its  outstanding obligations
under these  contracts would  exceed 10%  of the  Series' total  assets. To  the
extent  that the  Series enters  into futures  contracts and  options on futures
positions that  are  not for  bona  fide hedging  purposes  (as defined  by  the
Commodity Futures Trading Commission), the aggregate initial margin and premiums
on  these positions (excluding  the amount by  which options are "in-the-money")
may not exceed 5% of the Series' net assets.
 
Transactions using options and  futures contracts (other  than options that  the
Series  has purchased) expose the Series to  an obligation to another party. The
Series will not enter into  any such transactions unless  it owns either (1)  an
offsetting  ("covered")  position  in  securities or  other  options  or futures
contracts or (2) cash, receivables and  short-term debt securities with a  value
sufficient  at  all times  to  cover its  potential  obligations not  covered as
provided in (1)  above. The  Series will  comply with  SEC guidelines  regarding
cover  for these instruments and, if the  guidelines so require, set aside cash,
U.S. Government  securities or  other liquid,  high-grade debt  securities in  a
segregated account with its custodian in the prescribed amount.
 
                                       45
<PAGE>
All  options purchased  or written by  the Series  must be listed  on a national
securities or futures exchange or traded in the over-the-counter ("OTC") market.
The Series  will not  purchase or  write OTC  options if,  as a  result of  such
transaction,  the  sum  of  (i)  the market  value  of  outstanding  OTC options
purchased by the  Series, (ii)  the market  value of  the underlying  securities
covered  by outstanding OTC  call options written  by the Series,  and (iii) the
market value of  all other assets  of the Series  that are illiquid  or are  not
otherwise  readily marketable, would exceed 15% of the net assets of the Series,
taken at market  value. However, if  an OTC option  is sold by  the Series to  a
primary U.S. Government securities dealer recognized by the Federal Reserve Bank
of New York and the Series has the unconditional contractual right to repurchase
such  OTC option from the dealer at  a predetermined price, then the Series will
treat as illiquid such amount  of the underlying securities  as is equal to  the
repurchase  price less  the amount  by which  the option  is "in-the-money" (the
difference between  current market  value  of the  underlying security  and  the
option's strike price). The repurchase price with primary dealers is typically a
formula price which is generally based on a multiple of the premium received for
the option plus the amount by which the option is "in-the-money."
 
The  Series may  write only  covered options.  A call  option is  covered if the
Series owns the underlying security or a call option on the same security with a
lower strike price. A put option is covered if the Series segregates cash and/or
short-term debt securities in an amount necessary to pay the strike price of the
option or purchases a put option on  the same underlying security with a  higher
strike price.
 
The  Series will not purchase puts, calls, straddles, spreads or any combination
thereof, if as  a result of  such purchase  the value of  the Series'  aggregate
investment in such securities would exceed 5% of the Series' total assets.
 
   
INVESTMENT RESTRICTIONS OF BLUE CHIP STOCK SERIES AND SMALL CAP VALUE SERIES. As
a  result of the following fundamental  investment restrictions, Blue Chip Stock
Series and Small Cap Value Series will not:
    
 
   (1) Borrow money except  that the Series may  (i) borrow for  non-leveraging,
temporary or emergency purposes and (ii) engage in reverse repurchase agreements
and  make other investments or engage in other transactions, which may involve a
borrowing, in  a manner  consistent with  the Series'  investment objective  and
program,  provided that the combination of (i) and (ii) shall not exceed 33 1/3%
of the value of  the Series' total assets  (including the amount borrowed)  less
liabilities  (other than borrowings) or such  other percentage permitted by law.
Any borrowings which come  to exceed this amount  will be reduced in  accordance
with  applicable laws. The Series may borrow  from banks or other persons to the
extent permitted by applicable law.
 
   (2) Purchase or  sell physical  commodities; except  that it  may enter  into
futures contracts and options thereon.
 
   
   (3)  Purchase the securities of any issuer if,  as a result, more than 25% of
the value of the  Series' total assets  would be invested  in the securities  of
issuers  having their principal business activities in the same industry, except
that the Small Cap Value Series, as a temporary defensive measure, may invest up
to 100% of  its total assets  in obligations  issued or guaranteed  by the  U.S.
government or its agencies.
    
 
   (4)  Make  loans,  although  the Series  may  (i)  lend  portfolio securities
provided that no such loan  may be made if, as  a result, the aggregate of  such
loans  would  exceed 33  1/3% of  the value  of the  Series' total  assets; (ii)
purchase money market securities and enter into repurchase agreements; and (iii)
acquire publicly-distributed or  privately-placed debt  securities and  purchase
debt.
 
   (5)  Purchase a security if, as a result, with respect to 75% of the value of
its total assets, more than 5% of the value of the Series' total assets would be
invested in  the securities  of a  single issuer,  except securities  issued  or
guaranteed by the U.S. Government or any of its agencies or instrumentalities.
 
   (6)  Purchase a security if, as a result, with respect to 75% of the value of
the Series' total assets, more than 10% of the outstanding voting securities  of
any  issuer  would be  held  by the  Series  (other than  obligations  issued or
guaranteed by the U.S. Government, its agencies or instrumentalities).
 
   (7) Purchase or sell real estate unless acquired as a result of ownership  of
securities  or other  instruments (but  this shall  not prevent  the Series from
investing in  securities  or other  instruments  backed  by real  estate  or  in
securities of companies engaged in the real estate business).
 
   (8)  Issue senior securities except in compliance with the Investment Company
Act of 1940.
 
   (9) Underwrite securities issued by other persons, except to the extent  that
the  Series  may  be deemed  to  be an  underwriter  within the  meaning  of the
Securities Act of 1933 in connection with the purchase and sale of its portfolio
securities in the ordinary course of pursuing its investment program.
 
The following  notes  should be  read  in connection  with  the  above-described
fundamental policies. The notes are not fundamental policies.
 
   
With  respect to investment restriction (2), the Series do not consider currency
contracts or hybrid investments to be commodities.
    
 
   
For purposes of investment restriction (3), U.S., state or local governments, or
related  agencies  or  instrumentalities,   are  not  considered  an   industry.
Industries  are determined by reference to the classifications of industries set
forth in  the Series'  semi-annual and  annual reports.  In applying  investment
restriction (3), the Small Cap Value Series uses the industry groups used in the
Data Monitor Portfolio Monitoring system of William O'Neil & Co. Incorporated.
    
 
For  purposes  of  investment  restriction (4),  the  Series  will  consider the
acquisition of a  debt security  to include  the execution  of a  note or  other
evidence of an extension of credit with a term of more than nine months.
 
   
The  following  non-fundamental investment  restrictions may  be changed  by the
Board of Directors  without shareholder  approval. Blue Chip  Growth Series  and
Small Cap Value Series will not:
    
 
   
   (1)  Purchase additional  securities when  money borrowed  exceeds 5%  of its
total assets.
    
 
   (2) Invest in companies for the purpose of exercising management or control.
 
   (3) Purchase a  futures contract  or an option  thereon if,  with respect  to
positions  in futures  or options  on futures which  do not  represent bona fide
hedging, the aggregate initial margin and premiums on such options would  exceed
5% of the Series' net asset value.
 
   (4)  Purchase illiquid securities and securities of unseasoned issuers if, as
a result, more than 15% of its net assets would be invested in such  securities,
provided  that the Series will  not invest more than 10%  of its total assets in
restricted securities and not more than 5% in securities of unseasoned  issuers.
Securities eligible for resale under Rule 144A of the Securities Act of 1933 are
not included in the 10% limitation but are subject to the 15% limitation.
 
   
   (5) Purchase securities of open-end or closed-end investment companies except
in  compliance with the  1940 Act and  applicable state law.  Duplicate fees may
result from such purchases.
    
 
                                       46
<PAGE>
   (6) Purchase securities on  margin, except (i) for  use of short-term  credit
necessary  for clearance  of purchases of  portfolio securities and  (ii) it may
make margin deposits in connection  with futures contracts or other  permissible
investments.
 
   (7)  Mortgage, pledge, hypothecate  or, in any  manner, transfer any security
owned by the Series as security for  indebtedness except as may be necessary  in
connection  with permissible borrowings or investments and then such mortgaging,
pledging or hypothecating may not exceed 25% of the Series' total assets at  the
time of borrowing or investment.
 
   (8) Purchase participations or other direct interests in or enter into leases
with respect to, oil, gas, or other mineral exploration or development programs.
 
   (9)  Invest in puts,  calls, straddles, spreads,  or any combination thereof,
except to the  extent permitted by  the prospectus and  Statement of  Additional
Information.
 
  (10)  Lend its portfolio securities in an amount in excess of 10% of its total
assets.
 
  (11) Borrow money except  for borrowings up  to 25% of  its total assets  when
borrowing is necessary to meet redemptions.
 
  (12) Invest in the aggregate more than 10% of its total assets in put and call
options, futures contracts, and derivative instruments on securities.
 
   
INVESTMENT RESTRICTIONS OF LARGE CAP GROWTH SERIES. As a result of the following
fundamental investment restrictions, the Large Cap Growth Series will not:
    
 
   
   (1)  Purchase more than 10%  of the outstanding voting  securities of any one
issuer.
    
 
   
   (2) Invest 25% or more of the value of its total assets in the same  industry
except  that this restriction does not  apply to securities issued or guaranteed
by the United States Government, its agencies and instrumentalities.
    
 
   
   (3) Borrow money or issue senior securities except for temporary or emergency
purposes in an amount not exceeding 5% of  the value of its total assets at  the
time the borrowing is made.
    
 
   
   (4)  Pledge, mortgage,  hypothecate or otherwise  encumber any  of its assets
except in  connection with  the writing  of call  options and  except to  secure
permitted borrowings.
    
 
   
   (5)  Make loans except through the purchase of debt obligations in accordance
with its investment objective and policies.
    
 
   
   (6) Write put options.
    
 
   
   (7) Purchase the  securities of  any other investment  company or  investment
trust,  except  when  such  purchase  is  part  of  a  merger,  consolidation or
acquisition of assets.
    
 
   
   (8) (a) Purchase or  sell real estate  except that it  may purchase and  sell
securities  of  companies that  deal in  real estate  or interests  therein; (b)
purchase or  sell commodities  or commodity  contracts (other  than stock  index
futures contracts), (c) make short sales of securities or purchase securities on
margin  except for such short-term credits as may be necessary for the clearance
of transactions, or  (d) act as  an underwriter of  securities, except that  the
Premier Growth Series may acquire restricted securities or securities in private
placements  under  circumstances in  which, if  such  securities were  sold, the
Premier Growth Series might be deemed to be an underwriter within the meaning of
the Securities Act of 1933.
    
 
   
The following  non-fundamental  investment  policies  and  restrictions  may  be
changed  by the Board of Directors without shareholder approval. The Series will
not:
    
 
   
   (1) Invest more  than 20% of  the value  of its total  assets in  convertible
securities.
    
 
   
   (2)  Invest  more than  5% of  the value  of  its total  assets in  rights or
warrants that entitle the holder to buy equity securities.
    
 
   
   (3) Invest more than 15%  of the value of its  total assets in securities  of
foreign issuers.
    
 
   
   (4)  Invest  more than  15%  of the  value of  its  total assets  in illiquid
securities,  as  determined   pursuant  to  applicable   Commission  rules   and
interpretations.
    
 
   
   (5)  Invest  more than  5% of  the value  of its  total assets  in restricted
securities. Securities sold under Section 4(2) of the 1933 Act that are eligible
for resale pursuant to Rule 144A under the 1933 Act that have been determined to
liquid  by  the  Board  of  Directors  or  the  sub-adviser,  acting  under  the
supervision  of the Board of Directors, will  not be considered to be restricted
securities.
    
 
   
   (6) Sell  a call  option written  by it  if, as  a result  of the  sale,  the
aggregate  of  the  Series'  portfolio securities  subject  to  outstanding call
options (valued  at the  lower  of the  option price  or  market value  of  such
securities) would exceed 15% of the value of the Series' total assets.
    
 
   
   (7)  Invest  more  than 10%  of  its total  assets  in put  and  call options
(including options on market indices).
    
 
   
   (8) Purchase or sell options on stock index futures contracts.
    
 
   
   (9) Purchase or sell  a stock index future  if, immediately thereafter,  more
than 30% of its total assets would be hedged by stock index futures.
    
 
   
  (10)  Participate on a  joint, or joint  and several, basis  in any securities
trading account.
    
 
   
  (11) Invest in companies for the purpose of exercising control.
    
 
   
  (12) Invest  in  interests  in  oil,  gas  or  other  mineral  exploration  or
development  programs,  except  that  it may  purchase  and  sell  securities in
companies that deal  in oil,  gas or  other mineral  exploration or  development
programs.
    
 
Any  investment  restriction  or  limitation,  fundamental  or  otherwise, which
involves a maximum percentage of securities or assets shall not be considered to
be violated  (except in  the case  of the  limitation on  illiquid  investments)
unless  an excess over the percentage occurs immediately after an acquisition of
securities or utilization of assets, and such excess results therefrom.
 
The insurance laws  and regulations  of various states  could impose  additional
restrictions  on the  investments of  the various  Series. One  such restriction
currently prohibits the Separate Accounts  from acquiring the voting  securities
of  any issuer  if, as a  result of  the acquisition, the  Separate Accounts and
Fortis Benefits, in the aggregate,  will own more than  10% of the total  issued
and  outstanding voting securities of  the issuer. Another restriction currently
prohibits the  underlying Series  of the  Separate Accounts  from acquiring  the
securities  of  any issuer,  other than  securities issued  or guaranteed  as to
principal and interest  by the  United States Government,  if immediately  after
such acquisition, the value of the investment together with prior investments in
the  security would  exceed 10%  of the  value of  the underlying  Series of the
Separate Accounts' total assets.
 
                                       47
<PAGE>
RISK FACTORS
 
RISKS OF TRANSACTIONS IN HIGH-YIELDING SECURITIES. Participation in  lower-rated
securities transactions generally involves greater returns in the form of higher
average  yields. However,  participation in  such transactions  involves greater
risks, often  related  to  sensitivity  to  interest  rates,  economic  changes,
solvency, and relative liquidity in the secondary trading market.
 
Yields  on high yield securities  will fluctuate over time.  The prices of high-
yielding securities  have been  found  to be  less  sensitive to  interest  rate
changes  than higher-rated investments,  but more sensitive  to adverse economic
changes or individual corporate developments. Also, during an economic  downturn
or  substantial period  of rising  interest rates  highly leveraged  issuers may
experience financial  stress  which  would adversely  affect  their  ability  to
service  their  principal and  interest payment  obligations, to  meet projected
business goals, and to obtain additional financing. If the issuer of a  security
held  by the Diversified  Income Series, High Yield  Series, or Asset Allocation
Series defaulted, such Series may incur additional expenses to seek recovery. In
addition, periods of economic uncertainty and changes can be expected to  result
in  increased volatility of  market prices of  high-yielding securities and such
Series' asset  value.  Furthermore,  in the  case  of  high-yielding  securities
structured  as zero coupon or payment  in kind securities ("PIKs"), their market
prices are affected  to a greater  extent by interest  rate changes and  thereby
tend  to be more volatile than securities which pay interest periodically and in
cash.
 
High-yielding securities  present  risks  based  on  payment  expectations.  For
example,  high-yielding securities may contain redemption or call provisions. If
an issuer exercises these provisions in a declining interest rate market,  these
Series likely would have to replace the security with a lower-yielding security,
resulting  in  a decreased  return  for investors.  Conversely,  a high-yielding
security's value will  decrease in a  rising interest rate  market, as will  the
value  of  such  Series'  assets.  If  such  Series  experience  unexpected  net
redemptions, this may force them to sell their high-yielding securities, without
regard to their investment merits, thereby decreasing the asset base upon  which
the Series' expenses can be spread and possibly reducing the rate of return.
 
To  the extent that there is no  established secondary market, there may be thin
trading of high-yielding securities.  This may adversely  affect the ability  of
the  Board of  Directors to accurately  value high-yielding  securities and such
Series' assets and such Series' ability to dispose of the securities. Securities
valuation becomes more difficult and judgment plays a greater role in  valuation
because  there is less  reliable, objective data  available. Adversely publicity
and investor  perceptions, whether  or not  based on  fundamental analysis,  may
decrease  the values and liquidity of  high-yielding securities, especially in a
thinly traded market. Illiquid or restricted high-yielding securities  purchased
by  such Series  may involve special  registration responsibilities, liabilities
and costs, and liquidity and valuation difficulties.
 
New laws and proposed new  laws could have an adverse  impact on the market  for
such  securities.  As  examples, recent  legislation  requires federally-insured
savings and  loan  associations to  divest  their investments  in  high-yielding
securities and pending proposals are designed to limit the use, or tax and other
advantages  of high-yielding securities. The  new legislation and the proposals,
if enacted, could have an  adverse effect on these  Series' net asset value  and
investment  practices,  with  the  extent  of  the  impact  depending  upon  the
composition of such Series at that time.
 
Certain risks  are associated  with  applying credit  ratings  as a  method  for
evaluating  high-yielding securities.  For example, credit  ratings evaluate the
safety of  principal and  interest  payments, not  market  value risk  of  high-
yielding  securities. Since credit rating agencies may fail to timely change the
credit ratings to reflect subsequent events, Advisers continuously monitors  the
issuers  of high-yielding  securities held by  these Series to  determine if the
issuers will have sufficient  cash flow and profits  to meet required  principal
and  interest payments, and  to assure the securities'  liquidity so such Series
can meet redemption  requests. The  achievement of the  investment objective  of
such Series may be more dependent upon Advisers' own credit analysis than is the
case  for  higher  quality bonds.  Also,  these  Series may  retain  a portfolio
security whose  rating has  been changed  if the  security otherwise  meets  the
Series' investment objectives and investment criteria.
 
   
RISKS  OF INVESTING IN  FOREIGN SECURITIES. Investing  in securities of non-U.S.
companies may  entail  additional  risks  due to  the  potential  political  and
economic   instability  of   certain  countries  and   risks  of  expropriation,
nationalization, confiscation,  or the  imposition  of restrictions  on  foreign
investment  and  on  repatriation of  capital  invested.  In the  event  of such
expropriation, nationalization,  or  other  confiscation, by  any  country,  the
Series  could lose its entire investment  in any such country. Certain countries
prohibit or  impose substantial  restrictions on  investments in  their  capital
markets,  particularly their  equity markets,  by foreign  entities such  as the
Series. As illustrations, certain countries require governmental approval  prior
to  investments by foreign persons, or limit the amount of investment by foreign
persons in a particular company, or  limit the investment by foreign persons  to
only a specific class of securities of a company that may have less advantageous
terms  than  securities  of the  company  available for  purchase  by nationals.
Moreover, the national  policies of  certain countries  may restrict  investment
opportunities  in issuers or industries  deemed sensitive to national interests.
In addition, some countries require  governmental approval for the  repatriation
of  investment income, capital,  or the proceeds of  securities sales by foreign
investors. A Series,  particularly Global Bond  Series, Global Asset  Allocation
Series,  International Stock Series and Global Growth Series, could be adversely
affected by delays in, or a refusal to grant, any required governmental approval
for repatriation, as well as by the  application to it of other restrictions  on
investments.
    
 
Foreign companies are not generally subject to uniform accounting, auditing, and
financial  reporting standards or to other regulatory requirements comparable to
those applicable to U.S.  companies. Most of the  securities held by the  Global
Bond   Series,  Global  Asset  Allocation  Series,  Global  Growth  Series,  and
International Stock Series will not be registered with the SEC or regulators  of
any  foreign  country, nor  will the  issuers  thereof be  subject to  the SEC's
reporting  requirements.  Thus,  there   will  be  less  available   information
concerning  foreign issuers of  securities held by the  Series than is available
concerning U.S.  issuers. In  instances  where the  financial statements  of  an
issuer  are  not deemed  to reflect  accurately the  financial situation  of the
issuer, the  Series  will  take  appropriate  steps  to  evaluate  the  proposed
investment,  which may include on-site inspection of the issuer, interviews with
its  management  and   consultations  with  accountants,   bankers,  and   other
specialists.
 
   
Because  Global Bond Series, Global Asset Allocation Series, International Stock
Series and Global  Growth Series will  each invest  at least a  majority of  its
total  assets  in the  securities of  foreign issuers  which are  denominated in
foreign currencies, the  strength or weakness  of the U.S.  dollar against  such
foreign currencies may account for part of the Series' investment performance. A
decline  in the value  of any particular  currency against the  U.S. dollar will
cause a decline in the U.S. dollar  value of the Series' holdings of  securities
denominated  in such currency  and, therefore, will cause  an overall decline in
the Series' net asset value and any  net investment income and capital gains  to
be distributed in U.S. dollars to shareholders of such Series.
    
 
                                       48
<PAGE>
The  rate of exchange between the U.S. dollar and other currencies is determined
by several factors including  the supply and  demand for particular  currencies,
central  bank efforts to support particular currencies, the movement of interest
rates, the pace of business activity  in certain other countries, and the  U.S.,
and other economic and financial conditions affecting the world economy.
 
   
Although Global Bond Series, Global Asset Allocation Series, International Stock
Series  and Global Growth Series  each values its assets  daily in terms of U.S.
dollars, each such  Series does not  intend to convert  its holdings of  foreign
currencies into U.S. dollars on a daily basis. These Series will do so from time
to  time, and  investors should  be aware of  the costs  of currency conversion.
Although foreign exchange dealers  do not charge a  fee for conversion, they  do
realize  a profit based on  the difference (the "spread")  between the prices at
which they are buying and selling  various currencies. Thus, a dealer may  offer
to  sell a foreign currency  to the Series at one  rate, while offering a lesser
rate of exchange should the Series desire to sell that currency to the dealer.
    
 
Securities of many  foreign issuers  may be less  liquid and  their prices  more
volatile  than  securities  of  comparable U.S.  issuers.  In  addition, foreign
securities exchanges  and brokers  are generally  subject to  less  governmental
supervision  and regulation  than in the  U.S., and  foreign securities exchange
transactions are  usually  subject to  fixed  commissions, which  are  generally
higher  than negotiated commissions  on U.S. transactions.  In addition, foreign
securities exchange transactions may be subject to difficulties associated  with
the  settlement  of  such transactions.  Delays  in settlement  could  result in
temporary periods when  assets of  the Series are  uninvested and  no return  is
earned  thereon. The inability of the Series to make intended security purchases
due  to  settlement  problems  could   cause  the  Series  to  miss   attractive
opportunities.  Inability to dispose  of a portfolio  security due to settlement
problems either could result in losses to the Series due to subsequent  declines
in value of the portfolio security or, if the Series has entered into a contract
to  sell the security, could result in  possible liability to the purchaser. The
Series will consider such  difficulties when determining  the allocation of  the
Series' assets, although the Series does not believe that such difficulties will
have a material adverse effect on the portfolio trading activities.
 
   
The  Series'  net  investment income  from  foreign  issuers may  be  subject to
non-U.S. withholding taxes, thereby reducing the Series' net investment  income.
See "Taxation" in the Prospectus.
    
 
RISKS  OF INVESTING IN  ILLIQUID SECURITIES. The sale  of restricted or illiquid
securities often requires more time and  results in higher brokerage charges  or
dealer  discounts and  other selling expenses  than does the  sale of securities
eligible for trading on national securities exchanges or in the over-the-counter
markets. Restricted  securities  often  sell  at  a  price  lower  than  similar
securities that are not subject to restrictions on resale.
 
   
RISKS   OF   TRANSACTIONS   IN   OPTIONS,   FUTURES   CONTRACTS,   AND   FORWARD
CONTRACTS. Although  the Global  Bond Series,  High Yield  Series, Global  Asset
Allocation   Series,  International  Stock  Series,  Global  Growth  Series  and
Aggressive Growth  Series  may enter  into  transactions in  Futures  Contracts,
Options on Futures Contracts, Currency Contracts, and certain options solely for
hedging  purposes, their use does involve certain  risks. For example, a lack of
correlation between  the index  or instrument  underlying an  option or  futures
contract  and the  assets being  hedged or  unexpected adverse  price movements,
could render  such Series'  hedging strategy  unsuccessful and  could result  in
losses.  These Series also may enter  into transactions in options on securities
and indexes  of  securities for  other  than hedging  purposes,  which  involves
greater  risk. In addition,  there can be  no assurance that  a liquid secondary
market will  exist  for any  contract  purchased or  sold,  such Series  may  be
required to maintain a position until exercise or expiration, which could result
in losses.
    
 
Transactions  in options, Futures  Contracts, Options on  Futures Contracts, and
Currency Contracts may be entered into  on United States exchanges regulated  by
the  SEC  or  the  Commodity  Futures Trading  Commission,  as  well  as  in the
over-the-counter market and  on foreign exchanges.  In addition, the  securities
underlying options and Futures Contracts may include domestic as well as foreign
securities.  Investors  should  recognize  that  transactions  involving foreign
securities or  foreign  currencies, and  transactions  entered into  in  foreign
countries,  may involve considerations  and risks not  typically associated with
investing in U.S. markets.
 
DIRECTORS AND EXECUTIVE OFFICERS
 
   
The names, addresses, principal occupations, and other affiliations of directors
and executive officers of Fortis Series are given below. All positions have been
held at least five years unless otherwise stated.
    
 
   
<TABLE>
<CAPTION>
                                            POSITION WITH
       NAME AND ADDRESS            AGE      FORTIS SERIES       PRINCIPAL OCCUPATION AND AFFILIATIONS DURING PAST 5 YEARS
- ------------------------------     ---     ---------------     ------------------------------------------------------------
<S>                                <C>     <C>                 <C>
Richard W. Cutting                 66      Director            Certified public accountant and financial consultant.
137 Chapin Parkway
Buffalo, New York
Allen R. Freedman*                 57      Director            Chairman and Chief Executive Officer of Fortis, Inc.; a
One Chase Manhattan Plaza                                      Managing Director of Fortis International, N. V.
New York, New York
Dr. Robert M. Gavin                57      Director            President, Cranbrook Education Community. Prior to July
380 Lone Pine Road                                             1996, President, Macalester College, St. Paul, MN.
Bloomfield Hills, MI
Benjamin S. Jaffray                67      Director            Chairman of the Sheffield Group, Ltd., a financial
4040 IDS Center                                                consulting group.
Minneapolis, Minnesota
Jean L. King                       53      Director            President, Communi-King, a communications consulting firm.
12 Evergreen Lane
St. Paul, Minnesota
</TABLE>
    
 
                                       49
<PAGE>
   
<TABLE>
<CAPTION>
                                            POSITION WITH
       NAME AND ADDRESS            AGE      FORTIS SERIES       PRINCIPAL OCCUPATION AND AFFILIATIONS DURING PAST 5 YEARS
- ------------------------------     ---     ---------------     ------------------------------------------------------------
<S>                                <C>     <C>                 <C>
Dean C. Kopperud*                  45      President and       Chief Executive Officer and a Director of Advisers,
500 Bielenberg Drive                       Director            President and a Director of Investors, President of Fortis
Woodbury, Minnesota                                            Financial Group, a Director of Fortis Benefits Insurance
                                                               Company and a Senior Vice President of Time Insurance
                                                               Company.
Edward M. Mahoney                  67      Director            Retired. Prior to December 1994, Chairman, Chief Executive
2760 Pheasant Road                                             Officer and a Director of Advisers and Investors, Senior
Excelsior, Minnesota                                           Vice President and a Director of Fortis Benefits Insurance
                                                               Company, and Senior Vice President of Time Insurance
                                                               Company.
Robb L. Prince                     56      Director            Financial and Employee Benefit Consultant. Prior to July
5108 Duggan Plaza                                              1995, Vice President and Treasurer, Jostens, Inc., a
Edina, Minnesota                                               producer of products and services for the youth, education,
                                                               sports award, and recognition markets.
Leonard J. Santow                  61      Director            Principal, Griggs & Santow, Incorporated, economic and
75 Wall Street                                                 financial consultants.
21st Floor
New York, New York
Noel S. Shadko                     43      Director            Marketing Consultant. Prior to May 1996, Senior Vice
1908 W. 49th St.                                               President of Marketing and Strategic Planning, Rollerblade,
Minneapolis, Minnesota                                         Inc.
Joseph M. Wikler                   56      Director            Investment consultant and private investor. Prior to 1994,
12520 Davan Drive                                              Director of Research, Chief Investment Officer, Principal,
Silver Spring, Maryland                                        and a Director, The Rothschild Co., Baltimore, MD.
Gary N. Yalen                      55      Vice President      President and Chief Investment Officer of Advisers (since
One Chase Manhattan Plaza                                      1995), a Director of Advisers and Senior Vice President,
New York, New York                                             Investments, Fortis, Inc. Prior to 1996, President and Chief
                                                               Investment Officer, Fortis Asset Management, a former
                                                               division of Fortis, Inc.
Howard G. Hudson                   60      Vice President      Executive Vice President and Head of Fixed Income
One Chase Manhattan Plaza                                      Investments of Advisers since 1995. Prior to 1996, Senior
New York, New York                                             Vice President, Fixed Income, Fortis Asset Management.
Lucinda S. Mezey                   50      Vice President      Executive Vice President and Head of Equity Investments of
One Chase Manhattan Plaza                                      Advisers since October 1997. From 1995 to October 1997,
New York, New York                                             Chief Investment Officer, Alex Brown Capital Advisory and
                                                               Trust Co., Baltimore, MD and prior to 1995, Senior Vice
                                                               President and Head of Equity Investments, PNC Bank,
                                                               Philadelphia, PA.
James S. Byrd                      46      Vice President      Executive Vice President and a Director of Advisers. Prior
5500 Wayzata Boulevard                                         to 1995, Vice President of Advisers and of Investors.
Golden Valley, Minnesota
Nicholas L. M. de Peyster          31      Vice President      Vice President of Advisers since August 1995. Prior to 1996,
One Chase Manhattan Plaza                                      Vice President, Equities, Fortis Asset Management.
New York, New York
Charles J. Dudley                  38      Vice President      Vice President of Advisers and Fortis Asset Management since
One Chase Manhattan Plaza                                      1995. Prior to 1995, Senior Vice President, Sun America
New York, New York                                             Asset Management, Los Angeles, CA.
Maroun M. Hayek                    49      Vice President      Vice President of Advisers since 1995. Prior to 1996, Vice
One Chase Manhattan Plaza                                      President, Fixed Income, Fortis Asset Management.
New York, New York
Robert C. Lindberg                 45      Vice President      Vice President of Advisers.
One Chase Manhattan Plaza
New York, New York
Charles L. Mehlhouse               55      Vice President      Vice President of Advisers. Prior to March 1996, Portfolio
One Chase Manhattan Plaza                                      Manager, Marshall & Ilsley Bank Corporation Milwaukee, WI.
New York, New York
Kevin J. Michels                   46      Vice President      Vice President of Advisers since 1995. Prior to 1996, Vice
One Chase Manhattan Plaza                                      President, Administration, Fortis Asset Management.
New York, New York
Christopher J. Pagano              34      Vice President      Vice President of Advisers since 1996. Prior to March 1996,
One Chase Manhattan Plaza                                      Government Strategist, Merrill Lynch, New York, NY.
New York, New York
Christopher J. Woods               37      Vice President      Vice President of Advisers since 1995. Prior to 1996, Vice
One Chase Manhattan Plaza                                      President, Fixed Income, Fortis Asset Management.
New York, New York
</TABLE>
    
 
                                       50
<PAGE>
   
<TABLE>
<CAPTION>
                                            POSITION WITH
       NAME AND ADDRESS            AGE      FORTIS SERIES       PRINCIPAL OCCUPATION AND AFFILIATIONS DURING PAST 5 YEARS
- ------------------------------     ---     ---------------     ------------------------------------------------------------
<S>                                <C>     <C>                 <C>
Robert W. Beltz, Jr.               48      Vice President      Vice President--Securities Operations of Advisers and
500 Bielenberg Drive                                           Investors.
Woodbury, Minnesota
Peggy E. Ettestad                  40      Vice President      Senior Vice President, Operations of Advisers since March
500 Bielenberg Drive                                           1997. Prior to March 1997, Vice President, G.E. Capital
Woodbury, MN                                                   Fleet Services, Minneapolis, MN.
Dickson W. Lewis                   48      Vice President      Senior Vice President, Marketing and Sales of Advisors since
500 Bielenberg Drive                                           July 1997. From 1993 to July 1997, President and Chief
Woodbury, Minnesota                                            Executive Officer, Hedstrom/Blessing, Inc., Minneapolis, MN.
Tamara L. Fagely                   39      Vice President      Second Vice President of Advisers and Investors.
500 Bielenberg Drive                       and Treasurer
Woodbury, Minnesota
David A. Peterson                  55      Vice President      Vice President and Assistant General Counsel, Fortis
500 Bielenberg Drive                                           Benefits Insurance Company.
Woodbury, Minnesota
Scott R. Plummer                   38      Vice President      Vice President, Associate General Counsel and Assistant
500 Bielenberg Drive                                           Secretary of Advisers. Prior to September 1993, Attorney,
Woodbury, Minnesota                                            Zelle & Larson, Minneapolis, MN.
Michael J. Radmer                  52      Secretary           Partner, Dorsey & Whitney LLP, the Fund's General Counsel.
220 South Sixth Street
Minneapolis, Minnesota
Rhonda J. Schwartz                 39      Vice President      Since January 1996, Senior Vice President and General
500 Bielenberg Drive                                           Counsel of Advisers, Senior Vice President and General
Woodbury, Minnesota                                            Counsel, Life and Investment Products, Fortis Benefits
                                                               Insurance Company and Vice President and General Counsel,
                                                               Life and Investment Products, Time Insurance Company. From
                                                               1993 to January 1996, Vice President and General Counsel,
                                                               Fortis, Inc.
Melinda S. Urion                   45      Vice President      Since December 1997, Senior Vice President and Chief
500 Bielenberg Drive                                           Financial Officer of Advisers. Prior to December 1997,
Woodbury, Minnesota                                            Senior Vice President of Finance and Chief Financial
                                                               Officer, American Express Financial Corporation; prior to
                                                               March 1995, Corporate Controller, American Express Financial
                                                               Corporation and prior to 1994, Controller and Treasurer, IDS
                                                               Life Insurance Company, Minneapolis, MN.
</TABLE>
    
 
- ------------------------------------------------
   
*Mr. Kopperud  is an  "interested person"  (as defined  under the  1940 Act)  of
 Fortis  Series, Advisers and Investors primarily because he is an officer and a
 director of each.  Mr. Freedman  is an  "interested person"  of Fortis  Series,
 Advisers  and Investors because  he is Chairman and  Chief Executive Officer of
 Fortis, Inc. ("Fortis"),  the parent  company of Advisers  and indirect  parent
 company  of Investors, and a Managing  Director of Fortis International, N. V.,
 the parent company of Fortis.
    
 
- ------------------------------------------------
 
   
Each director who is not affiliated with Advisers or Investors receives fees  of
$700  per  month,  $100 per  meeting  attended  and $100  per  committee meeting
attended  (and  reimbursement  of  travel  expenses  to  attend  meetings.)  The
following  table sets forth the aggregate compensation received by each director
during  the  fiscal  year  ended  December  31,  1997,  as  well  as  the  total
compensation received by each director from Fortis Series and all other open-end
investment  companies managed by Advisers during  the fiscal year ended December
31, 1997. Neither  Mr. Freedman,  who is  an officer  of the  parent company  of
Advisers,  nor  Mr.  Kopperud, who  is  an  officer of  Advisers  and Investors,
received any  such compensation  and they  are  not included  in the  table.  No
executive  officer  of Fortis  Series received  compensation from  Fortis Series
during the fiscal year ended December 31, 1997.
    
   
<TABLE>
<CAPTION>
                                 AGGREGATE
                               COMPENSATION     TOTAL COMPENSATION
                                FROM FORTIS     FROM FUND COMPLEX
         DIRECTOR                 SERIES        PAID TO DIRECTOR*
<S>                          <C>                <C>
- ------------------------------------------------------------------
Richard W. Cutting               $                  $
Dr. Robert M. Gavin
Benjamin S. Jaffray
Jean L. King
Edward M. Mahoney
Robb L. Prince
 
<CAPTION>
                                 AGGREGATE
                               COMPENSATION     TOTAL COMPENSATION
                                FROM FORTIS     FROM FUND COMPLEX
         DIRECTOR                 SERIES        PAID TO DIRECTOR*
<S>                          <C>                <C>
- ------------------------------------------------------------------
Leonard J. Santow                $                  $
Noel S. Shadko
Joseph M. Wikler
</TABLE>
    
 
- --------------------------
   
*The Fund  Complex consists  of 10  registered investment  companies managed  by
 Advisers.  All of  the above  officers and  directors also  are officers and/or
 directors of each such open-end and closed-end investment company.
    
 
   
As of March 31, 1998,  less than 1% of the  outstanding shares of Fortis  Series
were  attributable to Contracts owned of record or beneficially by the directors
and executive  officers  as  a  group;  the  directors  and  executive  officers
otherwise  do not own any of the  outstanding shares of Fortis Series. Directors
Kopperud, Mahoney,  Prince,  Gavin,  Jaffray  and  Shadko  are  members  of  the
Executive  Committee of the Board of Directors. While the Executive Committee is
authorized to act  in the  intervals between  regular board  meetings with  full
capacity and authority of the full Board of Directors, except as limited by law,
it is expected that the Committee will meet at least twice a year.
    
 
                                       51
<PAGE>
INVESTMENT ADVISORY AND OTHER SERVICES
 
GENERAL
 
Fortis  Advisers, Inc. ("Advisers") has been  the investment adviser and manager
of Fortis Series since Fortis Series  began business in 1986. Investors acts  as
Fortis  Series' underwriter.  Both act  as such  pursuant to  written agreements
periodically approved by  the directors  or shareholders of  Fortis Series.  The
address of both Advisers and Investors is P.O. Box 64284, St. Paul, MN 55164.
 
   
As  of March 31, 1997, Advisers managed            investment company portfolios
with combined net assets of approximately $           , and one private  account
with net assets of approximately $           .
    
 
   
During  the fiscal years ended December 31, 1995, 1996 and 1997, the Series paid
investment advisory  and  management  fees  to  Advisers  as  described  in  the
following table.
    
 
   
<TABLE>
<CAPTION>
                                               YEAR ENDED DECEMBER 31,
                                        -------------------------------------
SERIES                                     1995         1996         1997
- --------------------------------------  -----------  -----------  -----------
<S>                                     <C>          <C>          <C>
Money Market..........................  $   122,669  $   157,756  $
U.S. Government Securities............      809,341      786,612
Diversified Income....................      486,523      503,938
Global Bond...........................       72,526      131,386
High Yield............................      105,511      171,148
Global Asset Allocation...............      107,500      258,678
Asset Allocation......................    1,484,851    1,794,647
Value.................................           --       32,997
Growth & Income.......................      247,814      660,575
S&P 500 Index.........................           --       34,900
Blue Chip Stock.......................           --       66,780
International Stock...................      102,257      317,951
Mid Cap Stock.........................           --           --
Small Cap Value.......................           --           --
Global Growth.........................    1,210,019    1,888,142
Large Cap Growth......................           --           --
Growth Stock..........................    2,873,197    3,734,829
Aggressive Growth.....................      197,016      535,835
</TABLE>
    
 
   
During  the fiscal year ended December 31,  1997, Advisers paid advisory fees to
the sub-advisers in the amount of $      for the Global  Bond Series, $      for
the  Global Asset Allocation Series, $     for  the S&P 500 Index Series, $
for the Blue Chip Stock Series, and $     for the International Stock Series.
    
 
CONTROL AND MANAGEMENT OF ADVISERS AND INVESTORS
 
Fortis owns 100% of the outstanding voting securities of Advisers, and  Advisers
owns all of the outstanding voting securities of Investors.
 
Fortis,  located in New York,  New York, is a  wholly owned subsidiary of Fortis
International, N.V., which  has approximately $100  billion in assets  worldwide
and  is  in turn  a wholly  owned  subsidiary of  AMEV/VSB 1990  N.V. ("AMEV/VSB
1990").
 
AMEV/VSB 1990 is a  corporation organized under the  laws of The Netherlands  to
serve  as the holding company for all U.S. operations and is owned 50% by Fortis
AMEV and 50% by Fortis AG ("Group AG"). AMEV/VSB 1990 owns a group of  companies
active in insurance, banking and financial services, and real estate development
in  The  Netherlands,  the United  States,  Western Europe,  Australia,  and New
Zealand.
 
   
Fortis AMEV  is  a  diversified  financial  services  company  headquartered  in
Utrecht,  The Netherlands, where its insurance  operations began in 1847. Fortis
AG is  a  diversified  financial services  company  headquartered  in  Brussels,
Belgium,  where its insurance operations  began in 1824. N.V.  AMEV and Group AG
own a group of companies  (of which AMEV/VSB 1990  is one) active in  insurance,
banking  and financial services, and real estate development in The Netherlands,
Belgium, the United States, Western Europe and the Pacific Rim.
    
 
INVESTMENT ADVISORY AND MANAGEMENT AGREEMENT
 
   
Advisers acts as  investment adviser  and manager of  each of  the Series  under
separate  Investment Advisory  and Management  Agreements. These  agreements are
individually referred  to as  an  "Agreement" and  collectively referred  to  as
"Agreements."  The Agreements will terminate automatically in the event of their
assignment. In  addition, the  Agreements are  terminable at  any time,  without
penalty, by the Board of Directors or, with respect to any particular Series, by
vote  of  a majority  of  the outstanding  voting  securities of  the applicable
Series, on not more than 60 days' written notice to Advisers, and by Advisers on
60 days' notice to Fortis Series. Unless sooner terminated, each Agreement shall
continue in effect for more than two  years after its execution only so long  as
such  continuance is specifically approved at least annually by either the Board
of Directors or, with respect to any particular Series, by vote of a majority of
the outstanding voting  securities of  the applicable Series,  provided that  in
either  event such continuance is also approved by the vote of a majority of the
directors who are not parties to  such Agreement, or interested persons of  such
parties,  cast in person at  a meeting called for the  purpose of voting on such
approval.
    
 
   
The Agreements collectively  provide for an  investment advisory and  management
fee calculated as described in the following table.
    
 
   
<TABLE>
<CAPTION>
                                                                 ANNUAL
                                                               INVESTMENT
                                                              ADVISORY AND
           SERIES                  AVERAGE NET ASSETS        MANAGEMENT FEE
- ----------------------------  ----------------------------  ----------------
<S>                           <C>                           <C>
Money Market Series           For the first $500 million          .30%
                              For assets over $500 million        .25%
U.S. Government Securities    For the first $50 million           .50%
Series                        For assets over $50 million         .45%
Diversified Income Series     For the first $50 million           .50%
                              For assets over $50 million         .45%
Global Bond Series            For the first $100 million          .75%
                              For assets over $100 million        .65%
High Yield Series             For the first $250 million          .50%
                              For assets over $250 million        .45%
Global Asset Allocation       For the first $100 million          .90%
Series                        For assets over $100 million        .85%
Asset Allocation Series       For the first $250 million          .50%
                              For assets over $250 million        .45%
Value Series                  For the first $100,000,000          .70%
                              For assets over $100,000,000        .60%
Growth & Income Series        For the first $100 million          .70%
                              For assets over $100 million        .60%
S&P 500 Index Series          All levels of assets                .40%
Blue Chip Stock Series        For the first $100,000,000          .90%
                              For assets over $100,000,000        .85%
International Stock Series    For the first $100 million          .85%
                              For assets over $100 million        .80%
Mid Cap Stock Series          For the first $100 million          .90%
                              For assets over $150 million        .85%
                              For assets over $250 million        .80%
Global Growth Series          For the first $500 million          .70%
                              For assets over $500 million        .60%
Growth Stock Series           For the first $100 million          .70%
                              For assets over $100 million        .60%
Large Cap Growth Series       For the first $100 million          .90%
                              For assets over $100 million        .80%
Small Cap Value Series        For the first $500 million          .90%
                              For assets over $500 million        .85%
                              For assets over $100 million        .80%
Aggressive Growth Series      For the first $100 million          .70%
                              For assets over $100 million        .60%
</TABLE>
    
 
                                       52
<PAGE>
Advisers pays the advisory fees of the investment sub-advisers of the Series. In
addition,  Advisers,  at  its  own  expense,  furnishes  suitable  office space,
facilities, equipment, administrative services, and clerical and other personnel
as may be  required for the  management of  the affairs and  business of  Fortis
Series,  and  acts as  Fortis Series'  registrar,  transfer agent,  and dividend
disbursing agent. Fortis Series  pays all its expenses  which are not  expressly
assumed  by Advisers  or Investors.  These expenses  include, among  others, the
investment advisory and management fee, the  fees and expenses of directors  and
officers of Fortis Series who are not "affiliated persons" of Advisers, interest
expenses,   taxes,  brokerage  fees  and   commissions,  fees  and  expenses  of
registering and qualifying Fortis Series  and its shares for distribution  under
Federal  securities laws, expenses of preparing prospectuses and of printing and
distributing  prospectuses  annually  to  existing  Contract  owners,  custodian
charges, auditing and legal expenses, insurance expenses, association membership
dues,   and  the  expense  of  reports  to  shareholders  and  Contract  owners,
shareholders' meetings, and  proxy solicitations. Fortis  Series is also  liable
for  such nonrecurring expenses  as may arise, including  litigation to which it
may be a party. Fortis Series may have an obligation to indemnify its  directors
and officers with respect to such litigation.
 
Advisers  bears the costs of acting  as Fortis Series transfer agent, registrar,
and dividend agent.  Investors has agreed  to pay all  expenses of  distributing
Fortis  Series' shares,  including, but  not limited  to, costs  of printing and
distributing prospectuses  to  new  Contract  owners.  Pursuant  to  a  separate
Distribution  Agreement between  Fortis Benefits and  investors, Fortis Benefits
reimburses Investors for these costs and expenses with respect to variable  life
insurance policies issued by Fortis Benefits or pays them on Investors' behalf.
 
   
From its advisory fee, Advisers pays fees to each of the sub-advisers calculated
as described below:
    
 
   
<TABLE>
<CAPTION>
                                                                           ANNUAL SUB-
          SERIES             SUB-ADVISER         AVERAGE NET ASSETS       ADVISORY FEE
- --------------------------  --------------  ----------------------------  -------------
<S>                         <C>             <C>                           <C>
Global Bond Series          Warburg         For the first $100 million     .350%
                                            For assets over $100 million   .225%
 
Global Asset Allocation     Morgan Stanley  For the first $100 million     .500%
Series                                      For assets over $100 million   .400%
 
S&P 500 Index Series        Dreyfus         All levels of assets           .170%
 
Blue Chip Stock Series      T. Rowe Price   For the first $100,000,000     .500%
                                            For assets over $100,000,000   .450%
 
International Stock Series  Lazard Freres   For the first $100 million     .450%
                                            For assets over $100 million   .375%
 
Mid Cap Stock Series        Dreyfus         For the first $100 million     .500%
                                            For the next $150 million      .450%
                                            For assets over $250 million   .400%
 
Small Cap Value Series      Berger          For the first $50 million      .500%
                            Associates      For assets over $50 million    .450%
 
Large Cap Growth Series     Alliance        For the first $100 million     .500%
                                            For the next $100 million      .450%
                                            For assets over $200 million   .400%
</TABLE>
    
 
   
Out  of its  advisory fee,  but not  in excess  thereof, Advisers  has agreed to
reimburse Mid Cap  Stock Series,  Small Cap Value  Series and  Large Cap  Growth
Series  for their expenses, until  their net assets first  reach $10 million, to
the extent that the expenses of the applicable Series (including the  investment
advisory  fees, but excluding interest,  taxes, brokerage fees, and commissions)
exceed an amount equal, on  an annual basis, to 1.25%  of the average daily  net
assets  of the  applicable Series.  In addition  to this  expense reimbursement,
Advisers reserves the right, but shall not be obligated, to institute  voluntary
expense  reimbursement programs which,  if instituted, shall  be in such amounts
and based on such  terms and conditions  as Advisers, in  its sole and  absolute
discretion,  determines. Furthermore,  Advisers reserves  the absolute  right to
discontinue any of  such reimbursement programs  at any time  without notice  to
Fortis Series.
    
 
Expenses  that  relate exclusively  to a  particular  Series, such  as custodian
charges and registration  fees for  shares, are  charged to  that Series.  Other
expenses  of  Fortis Series  are allocated  between the  Series in  an equitable
manner as determined by officers of  Fortis Series under the supervision of  the
Board  of Directors, usually  on the basis  of net assets  or number of contract
holders.
 
   
Although investment decisions for each Series are made independently from  those
of  the other  Series or  those of  other funds  or private  accounts managed by
Advisers, sometimes the  same security  is suitable  for more  than one  Series,
fund,  or  account.  If  and  when  two  or  more  Series,  funds,  or  accounts
simultaneously purchase  or sell  the same  security, the  transactions will  be
allocated  as to price  and amount in accordance  with arrangements equitable to
each Series, fund,  or account. The  simultaneous purchase or  sale of the  same
securities  by  a  Series  and  another Series,  fund,  or  account  may  have a
detrimental effect on the Series, as this may affect the price paid or  received
by the Series or the size of the position obtainable by the Series.
    
 
SUB-ADVISORY AGREEMENTS
 
   
Global  Bond Series, Global Asset Allocation  Series, S&P 500 Index Series, Blue
Chip Stock Series, International Stock Series,  Mid Cap Stock Series, Small  Cap
Value  Series  and  Large Cap  Growth  Series have  retained  sub-advisers under
investment sub-advisory agreements (the sub-advisory agreements are collectively
referred to as the "Sub-Advisory Agreements"). Each Sub-Advisory Agreement  will
terminate  automatically  upon the  termination of  the Investment  Advisory and
Management Agreement between Fortis Series and Advisers, and in the event of its
assignment. In addition, the Sub-Advisory Agreements are terminable at any time,
without penalty, by  the Board of  Directors, by Advisers  or by a  vote of  the
majority  of the  applicable Series' outstanding  voting securities  on 60 days'
written notice to  such Series'  sub-adviser and by  a sub-adviser  on 60  days'
written   notice  to  Advisers.  Unless   sooner  terminated,  the  Sub-Advisory
Agreements shall  continue in  effect from  year to  year if  approved at  least
annually  by the Board of Directors of Fortis  Series or by a vote of a majority
of the outstanding voting securities of the applicable Series, provided that  in
either  event such continuance is also approved by the vote of a majority of the
directors who  are not  interested  persons of  any  party to  the  Sub-Advisory
Agreements, cast in person at a meeting called for the purpose of voting on such
approval.
    
 
PORTFOLIO TRANSACTIONS AND ALLOCATION OF BROKERAGE
 
   
Advisers,  or if applicable, a sub-adviser,  is responsible for decisions to buy
and sell securities  for the  Series, the selection  of brokers  and dealers  to
effect  the transactions and  the negotiation of  brokerage commissions, if any,
subject to Advisers' general control. Transactions on a stock exchange in equity
securities will  be  executed primarily  through  brokers that  will  receive  a
commission  paid by the Series. The Series which buy fixed income securities, on
the other hand, will not normally incur any brokerage commissions. Fixed  income
securities,  as well as equity securities traded in the over-the-counter market,
are generally traded  on a  "net" basis with  dealers acting  as principals  for
their  own  accounts without  a  stated commission,  although  the price  of the
security usually includes  a profit  to the dealer.  In underwritten  offerings,
securities   are  purchased  at  a  fixed  price  that  includes  an  amount  of
compensation to  the underwriter,  generally referred  to as  the  underwriter's
concession  or  discount.  Certain of  these  securities may  also  be purchased
directly from an  issuer, in which  case neither commissions  nor discounts  are
paid.
    
 
                                       53
<PAGE>
In  placing orders  for securities transactions,  the primary  criterion for the
selection of a broker-dealer is the ability of the broker-dealer, in the opinion
of Advisers, to secure prompt execution of the transactions on favorable  terms,
including  the reasonableness of the commission and considering the state of the
market at  the time.  When consistent  with these  objectives, business  may  be
placed  with broker-dealers who furnish investment research services to Advisers
or a sub-adviser. Such  research services include advice,  both directly and  in
writing,  as  to the  value  of securities;  the  advisability of  investing in,
purchasing, or  selling  securities;  and the  availability  of  securities,  or
purchasers  or sellers of securities; as well as analyses and reports concerning
issues, industries, securities, economic factors and trends, portfolio strategy,
and the performance of  accounts. This allows Advisers  and the sub-advisers  to
supplement  their own investment research activities and to obtain the views and
information of  individuals and  research staffs  of many  different  securities
research  firms  prior to  making investment  decisions for  the Series.  To the
extent such commissions are directed  to these other broker-dealers who  furnish
research  services, Advisers or a sub-adviser receives a benefit, not capable of
evaluation in dollar amounts, without  providing any direct monetary benefit  to
the  Series from these commissions. Most  research services obtained by Advisers
or a sub-adviser generally  benefit several or all  of the investment  companies
and  private  accounts which  it manages,  as opposed  to solely  benefiting one
specific managed fund or account.  Normally, research services obtained  through
managed funds or accounts investing in common stocks would primarily benefit the
managed  funds or  accounts which  invest in  common stock;  similarly, services
obtained from  transactions in  fixed  income securities  would normally  be  of
greater  benefit  to  the  managed  funds  or  accounts  which  invest  in  debt
securities.
 
   
Neither Advisers nor  any sub-adviser has  entered into any  formal or  informal
agreements  with any  broker-dealers, nor does  it maintain  any "formula" which
must be followed in connection with the placement of Fortis Series  transactions
in  exchange for  research services  provided Advisers,  except as  noted below.
However, Advisers and each of the sub-advisers does maintain an informal list of
broker-dealers, which  is used  from time  to time  as a  general guide  in  the
placement   of   Fortis  Series   business,  in   order  to   encourage  certain
broker-dealers  to  provide  Advisers  with  research  services  which  Advisers
anticipates  will be useful to  it. Because the list  is merely a general guide,
which is  to be  used only  after the  primary criterion  for the  selection  of
broker-dealers  (discussed above) has been  met, substantial deviations from the
list  are  permissible  and  may  be   expected  to  occur.  Advisers  (or   the
sub-advisers)  will authorize Fortis  Series to pay an  amount of commission for
effecting a securities transaction in excess of the amount of commission another
broker-dealer  would  have  charged  only  if  Advisers  (or  the  sub-advisers)
determines  in  good  faith that  such  amount  of commission  is  reasonable in
relation to the value  of the brokerage and  research services provided by  such
broker-dealer,  viewed  in  terms  of  either  that  particular  transaction  or
Advisers' overall  responsibilities with  respect to  the accounts  as to  which
Advisers  (or  the  sub-advisers)  exercises  investment  discretion. Generally,
Fortis Series pays higher  commissions than the  lowest rates available.  Morgan
Stanley  has  agreements in  place with  several  broker-dealers that  relate to
equity trades  directed  by  Morgan  Stanley.  Berger  Associates  has  informal
agreements  in place  with several broker-dealers  that relate  to equity trades
directed by  Berger Associates.  Under  these agreements,  the brokers  pay  for
services  which  assist  the  investment  manager  (Morgan  Stanley  and  Berger
Associates) in making investment decisions. The brokers are obligated to achieve
best execution and the commission rates charged by the brokers are comparable to
those charged by brokers with which there is no such agreement.
    
 
Under the  1940  Act, no  Series  may  purchase portfolio  securities  from  any
underwriting  syndicate of which an affiliate of the Adviser or a sub-adviser is
a member, except under certain limited conditions set forth in Rule 10f-3  under
the  1940 Act. The Rule sets forth requirements relating to, among other things,
the terms  of an  issue  of securities  purchased by  a  Series, the  amount  of
securities  that may be purchased  in any one issue, and  the assets of a Series
that may be invested in a particular issue. In addition, purchases of securities
made pursuant to the terms  of the Rule must be  approved at least quarterly  by
the  Board of Directors  of Fortis Series,  including a majority  of the members
thereof who are not interested persons of Fortis Series.
 
Portfolio transactions may be effected  through affiliates of the  sub-advisers.
Prior  to  executing any  such transactions,  the Board  of Directors  of Fortis
Series will adopt policies incorporating the  standards of Rule 17e-1 under  the
1940  Act,  which  requires that  the  commissions  paid to  affiliates  must be
reasonable and  fair compared  to the  commissions, fees  or other  remuneration
received  or  to be  received  by other  brokers  in connection  with comparable
transactions involving similar  securities during a  comparable period of  time.
The  Rule  also  contains  review  requirements  and  requires  that  reports be
furnished to the Board of Directors and that records be maintained in connection
with such reviews.
 
   
During the fiscal  year ended December  31, 1997, for  Asset Allocation  Series,
brokerage commissions totaled $     , amounting to   % of average net assets and
resulting in an average commission rate paid of $    (calculated by dividing the
total brokerage commissions paid on applicable purchases and sales of securities
for  the period by the  total number of related  shares purchased and sold). For
Global Asset Allocation Series, brokerage commissions totaled $     ,  amounting
to   % of average net assets and resulting in an average commission rate paid of
$      . For Value Series, brokerage commissions totaled $    , amounting to   %
of average  net assets  and resulting  in  an average  commission rate  paid  of
$       .  For Growth &  Income Series,  brokerage commissions totaled  $      ,
amounting to   %  of average net assets and  resulting in an average  commission
rate  paid of $      . For S&P  500 Index Series,  brokerage commissions totaled
$     , amounting  to    % of  average net  assets and resulting  in an  average
commission  rate  paid  of $         .  For  Blue Chip  Stock  Series, brokerage
commissions totaled $     , amounting to   % of average net assets and resulting
in an  average commission  rate paid  of $        .  For Global  Growth  Series,
brokerage  commissions totaled $      , amounting to     % of average net assets
and resulting in an average  commission rate paid of  $      . For Growth  Stock
Series,  brokerage commissions totaled $      , amounting to    % of average net
assets and  resulting in  an  average commission  rate  paid of  $        .  For
International  Stock Series,  brokerage commissions  totaled $       , amounting
to   % of average net assets and resulting in an average commission rate paid of
$      . For Aggressive  Growth Series, brokerage  commissions totaled $       ,
amounting  to   %  of average net assets and  resulting in an average commission
rate paid of $     . Mid Cap Stock Series, Small Cap Value Series and Large  Cap
Growth Series had not commenced operations as of December 31, 1997.
    
 
   
For  Money Market Series, U.S.  Government Securities Series, Diversified Income
Series, Global Bond Series, High  Yield Series, Asset Allocation Series,  Global
Asset  Allocation Series,  Value Series, Growth  & Income Series,  S&P 500 Index
Series, Blue  Chip Stock  Series,  Global Growth  Series, Growth  Stock  Series,
International  Stock Series, and Aggressive Growth Series transactions having an
aggregate dollar value of approximately $     , $     , $     , $     , $      ,
$      , $     , $     , $     , $     $     , $     , $     , and $           ,
respectively, were traded at net prices including a spread or markup.
    
 
   
The Series' acquisitions  during the  fiscal year  ended December  31, 1997,  of
securities  of its regular brokers or dealers  or of the parent of those brokers
or dealers that  derive more than  fifteen percent of  their gross revenue  from
    
 
                                       54
<PAGE>
   
securities-related  activities is presented  below. Mid Cap  Stock Series, Small
Cap Value Series and Large Cap Growth Series had not commenced operations as  of
December 31, 1997.
    
   
<TABLE>
<CAPTION>
                                                               VALUE OF
                                                           SECURITIES OWNED
                                                           AT END OF PERIOD
NAME OF ISSUER                                                    ($)
- ---------------------------------------------------------  -----------------
<S>                                                        <C>
Money Market
  Ford Motor Credit Co...................................    $
  Merrill Lynch, Pierce, Fenner & Smith Inc..............
  IBM Credit Corp........................................
  General Electric Credit Corp...........................
  Household Finance Corp.................................
  American General Finance Corp..........................
  Commercial Credit Co...................................
  Prudential Funding Corp................................
  U.S. Bank (N.A.) Minneapolis...........................
U.S. Government Securities
  U.S. Bank (N.A.) Minneapolis...........................
Diversified Income
  U.S. Bank (N.A.) Minneapolis...........................
  Donaldson, Lufkin & Jenrette Sec.......................
  Merrill Lynch, Pierce, Fenner & Smith..................
  Morgan Stanley & Co., Inc..............................
  Lehman Brothers, Inc...................................
  J.P. Morgan & Co., Inc.................................
  Salomon Brothers, Inc..................................
High Yield
  U.S. Bank (N.A.) Minneapolis...........................
Asset Allocation
  U.S. Bank (N.A.) Minneapolis...........................
  Donaldson, Lufkin & Jenrette Sec.......................
  Merrill Lynch, Pierce, Fenner & Smith..................
  Morgan Stanley & Co., Inc..............................
  Lehman Brothers, Inc...................................
  Salomon Brothers, Inc..................................
 
<CAPTION>
                                                               VALUE OF
                                                           SECURITIES OWNED
                                                           AT END OF PERIOD
NAME OF ISSUER                                                    ($)
- ---------------------------------------------------------  -----------------
<S>                                                        <C>
Value
  U.S. Bank (N.A.) Minneapolis...........................    $     659,700
  Merrill Lynch, Pierce, Fenner & Smith..................           61,125
Global Asset Allocation..................................
  U.S. Bank (N.A.)Minneapolis............................        4,946,490
Growth & Income
  U.S. Bank (N.A.) Minneapolis...........................        6,044,000
S&P 500 Index
  First Bank (N.A.) Minneapolis..........................           34,125
  Merrill Lynch, Pierce, Fenner & Smith..................           48,900
  Morgan Stanley & Co., Inc..............................           34,275
  Salomon Brothers, Inc..................................           18,850
  J.P. Morgan & Co., Inc.................................           48,813
  Banker's Trust Co......................................           17,250
  Nations Bank...........................................          136,850
Blue Chip Stock
  Chase Manhattan Corp...................................          187,425
  Nations Bank...........................................          127,075
Global Growth
  U.S. Bank (N.A.) Minneapolis...........................        5,373,000
Growth Stock
  U.S. Bank (N.A.) Minneapolis...........................       31,938,595
International Stock......................................
  U.S. Bank (N.A.)Minneapolis............................          192,822
Aggressive Growth
  U.S. Bank (N.A.) Minneapolis...........................        4,688,000
</TABLE>
    
 
Fortis  Advisers, Inc. has developed written trade allocation procedures for its
management of the securities trading activities of its clients. Advisers manages
multiple portfolios, both public (mutual funds) and private. The purpose of  the
trade  allocation procedures is to treat the portfolios fairly and reasonably in
situations where the amount of a  security that is available is insufficient  to
satisfy the volume or price requirements of each portfolio that is interested in
purchasing that security.
 
Generally,  when the amount of securities available  in a public offering or the
secondary market is insufficient to satisfy the requirements for the  interested
portfolios,  the procedures require a pro rata allocation based upon the amounts
initially requested  by each  portfolio manager.  In allocating  trades made  on
combined  basis, Advisers seeks  to achieve the average  price of the securities
for each participating portfolio.
 
Because a pro rata  allocation may not always  adequately accommodate all  facts
and circumstances, the procedures provide for exceptions to allocate trades on a
basis  other than pro rata.  Examples of where adjustments  may be made include:
(i) the cash position  of the portfolios involved  in the transaction; and  (ii)
the relative importance of the security to a portfolio in seeking to achieve its
investment objective.
 
- --------------------------------------------------------------------------------
 
CAPITAL STOCK
 
   
Fortis  Series' shares have  a par value of  $.01 per share  and equal rights to
share in dividends and  assets. The shares possess  no preemptive or  conversion
rights.  On  December 31,  1997,  no person  to  Fortis Series'  knowledge owned
beneficially as much as 5% of the outstanding Shares of any Series.
    
 
Fortis Series currently has fifteen Series, each constituting a separate  series
of  shares.  Under  Fortis  Series'  Articles  of  Incorporation,  the  Board of
Directors is  authorized to  create  new series  in  addition to  those  already
existing  without the approval of the  shareholders of Fortis Series. Each share
of stock will have a pro-rata interest in the assets of the Series to which  the
stock  of that  series relates and  will have no  interest in the  assets of any
other Series. In the event of liquidation, each share of a Series would have the
same rights to dividends and assets as every other share of that Series.
 
Each share of a  Series has one vote  (with proportionate voting for  fractional
shares)  irrespective of the relative net asset  value of the Series' shares. On
some issues, such as the election of directors, all shares of Fortis Series vote
together as one series. Cumulative voting is not authorized. This means that the
holders of more than 50% of the shares voting for the election of directors  can
elect  100% of the  directors if they choose  to do so, and,  in such event, the
holders of the remaining shares will be unable to elect any directors.
 
                                       55
<PAGE>
   
On an  issue affecting  only a  particular Series,  the shares  of the  affected
Series  vote  as a  separate series.  An example  of  such an  issue would  be a
fundamental investment restriction pertaining to only one Series.
    
 
Fortis Series is not required under Minnesota law to hold annual or periodically
scheduled regular meetings of  shareholders. Minnesota corporation law  provides
for  the  Board  of Directors  to  convene  shareholder meetings  when  it deems
appropriate. In addition, if a regular meeting of shareholders has not been held
during the immediately preceding fifteen  months, a shareholder or  shareholders
holding three percent or more of the voting shares of Fortis Series may demand a
regular  meeting of shareholders by written notice  of demand given to the chief
executive officer or the chief financial officer of Fortis Series. Within ninety
days after receipt of the demand, a regular meeting of shareholders must be held
at Fortis Series' expense. Additionally, the 1940 Act requires shareholder votes
for all amendments to fundamental  investment policies and restrictions and  for
all investment advisory contracts and amendments thereto.
 
COMPUTATION OF NET ASSET VALUE AND PRICING
 
   
On  December 31, 1997, the Series' net  asset values per share was calculated as
shown below. Since Mid Cap  Stock Series, Small Cap  Value Series and Large  Cap
Growth  Series  had  not commenced  operations  as  of December  31,  1997, such
information is not provided.
    
 
   
<TABLE>
<S>                                       <C>
MONEY MARKET SERIES
Net Assets       ($        )
- ---------------------------               =  Net Asset Value Per Share ($    )
Shares Outstanding (       )
 
U.S. GOVERNMENT SECURITIES SERIES
Net Assets      ($         )
- ---------------------------               =  Net Asset Value Per Share ($    )
Shares Outstanding (        )
 
DIVERSIFIED INCOME SERIES
Net Assets        ($       )
- ---------------------------               =  Net Asset Value Per Share ($    )
Shares Outstanding (       )
 
GLOBAL BOND SERIES
Net Assets        ($       )
- ---------------------------               =  Net Asset Value Per Share ($    )
Shares Outstanding (       )
 
HIGH YIELD SERIES
Net Assets        ($       )
- ---------------------------               =  Net Asset Value Per Share ($    )
Shares Outstanding (       )
 
ASSET ALLOCATION SERIES
Net Assets        ($       )
- ---------------------------               =  Net Asset Value Per Share ($    )
Shares Outstanding (       )
 
GLOBAL ASSET ALLOCATION SERIES
Net Assets        ($       )
- ---------------------------               =  Net Asset Value Per Share ($    )
Shares Outstanding (       )
 
VALUE SERIES
Net Assets        ($       )
- ---------------------------               =  Net Asset Value Per Share ($    )
Shares Outstanding (       )
 
GROWTH & INCOME SERIES
Net Assets        ($       )
- ---------------------------               =  Net Asset Value Per Share ($    )
Shares Outstanding (       )
 
S&P 500 INDEX SERIES
Net Assets        ($       )
- ---------------------------               =  Net Asset Value Per Share ($    )
Shares Outstanding (       )
 
BLUE CHIP STOCK SERIES
Net Assets        ($       )
- ---------------------------               =  Net Asset Value Per Share ($    )
Shares Outstanding (       )
 
GLOBAL GROWTH SERIES
Net Assets        ($       )
- ---------------------------               =  Net Asset Value Per Share ($    )
Shares Outstanding (       )
 
GROWTH STOCK SERIES
Net Assets        ($       )
- ---------------------------               =  Net Asset Value Per Share ($    )
Shares Outstanding (       )
 
INTERNATIONAL STOCK SERIES
Net Assets        ($       )
- ---------------------------               =  Net Asset Value Per Share ($    )
Shares Outstanding (       )
 
AGGRESSIVE GROWTH SERIES
Net Assets        ($       )
- ---------------------------               =  Net Asset Value Per Share ($    )
Shares Outstanding (       )
</TABLE>
    
 
The primary close  of trading currently  is 3:00 P.M.  (Central Time), but  this
time  may be  changed. The  offering price for  purchase orders  received in the
office of Fortis  Series after  the beginning  of each  day the  New York  Stock
Exchange  (the  "Exchange") is  open for  trading  is based  on net  asset value
determined as of the primary closing time for business on the Exchange that day;
the price in effect  for orders received  after such close is  based on the  net
asset  value as of  such close of the  Exchange on the next  day the Exchange is
open for trading.
 
   
Generally, the net asset value of each Series' shares is determined on each  day
on  which  the Exchange  is  open for  business. The  Exchange  is not  open for
business on the following holidays (nor on  the nearest Monday or Friday if  the
holiday  falls  on a  weekend): New  Year's  Day, Martin  Luther King,  Jr. Day,
Presidents' Day,  Good  Friday,  Memorial  Day,  Independence  Day,  Labor  Day,
Thanksgiving  Day, and Christmas Day. Additionally,  net asset value need not be
determined (i) on days on which changes in the value of the portfolio securities
will not materially affect the current net asset value of the Series' shares; or
(ii) on days during which no such Series' shares are tendered for redemption and
no orders to purchase or sell such Series' shares are received by Fortis Series.
    
 
REDEMPTION
 
The right of the Separate  Account to redeem shares  or to receive payment  with
respect  to any  redemption may  be suspended only  for any  period during which
trading on  the Exchange  is  restricted as  determined  by the  Securities  and
Exchange  Commission  or  when such  Exchange  is closed  (other  than customary
weekend or holiday closings), for any period during which an emergency exists as
defined by the Securities and Exchange Commission as a result of which  disposal
of  a Series' securities or determination of  the net asset value of each Series
is not reasonably practicable, and for such other periods as the Securities  and
Exchange  Commission may by  order permit for the  protection of shareholders of
each Series.
 
   
Redemption of  shares,  or payment,  may  be suspended  at  times (a)  when  the
Exchange  is closed  for other than  customary weekend or  holiday closings, (b)
when trading on said Exchange is restricted, (c) when an emergency exists, as  a
result  of which  disposal by  Fortis Series  of securities  owned by  it is not
reasonably practicable, or it  is not reasonably  practicable for Fortis  Series
fairly to determine the value of its net assets, or during any other period when
the  Securities and  Exchange Commission,  by order,  so permits;  provided that
applicable rules and regulations of the Securities and Exchange Commission shall
govern as to whether the conditions prescribed in (b) or (c) exist.
    
 
                                       56
<PAGE>
TAXATION
 
   
The Series  have  qualified and  intend  to  continue to  qualify  as  regulated
investment  companies under the  Internal Revenue Code of  1986, as amended (the
"Code"). As long as  each Series so  qualifies, the Series is  not taxed on  the
income  it distributes to the shareholders. Generally,  in order to qualify as a
regulated investment company, a  Series must derive at  least 90 percent of  its
gross  income  from  dividends,  interest,  and gains  from  the  sale  or other
disposition of stock or securities or  other income derived with respect to  its
investing  in such stock or securities. In addition, less than 30 percent of its
income may be derived from sales of stock or securities held for less than three
months. Being qualified as a regulated investment company does not mean that the
Internal Revenue Service supervises Fortis Series or approves its policies.
    
 
   
Under the Code, each Series will generally  be treated as a separate entity  for
federal  tax  purposes. Therefore,  each Series  will  be treated  separately in
determining whether  it  qualifies as  a  regulated investment  company  and  in
determining  the net ordinary  income (or loss), net  realized capital gains (or
losses) and distributions necessary to relieve each Series of any federal income
tax liability.
    
 
Pursuant to the Code, each Series will be subject to a nondeductible excise  tax
for  each calendar year equal to 4 percent  of the excess, if any, of the amount
required to be distributed over the amount distributed. However, the excise  tax
does  not apply to  any income on  which a Series  pays income tax.  In order to
avoid the imposition  of this  excise tax,  each Series  generally must  declare
dividends  by the end of a calendar  year representing 98 percent of the Series'
ordinary income for the  calendar year and  98 percent of  its capital gain  net
income (both long-term and short-term capital gains) for the twelve-month period
ending October 31 of the calendar year.
 
The  Code  imposes certain  diversification requirements  on the  investments of
segregated  asset  accounts  underlying  variable  annuity  and  life  insurance
contracts. Treasury Regulations interpret those requirements. Under the Code and
the  Regulations, if  a variable  contract is  based in  part or  in whole  on a
segregated asset account that fails  to meet the diversification standards,  the
variable  contract will not be treated as  an annuity or life insurance contract
for federal income tax  purposes. As a consequence,  the income on the  contract
for  any taxable year, whether  or not distributed, will  be treated as ordinary
income received by the Contract owner during such year.
 
   
As a general rule, each Series may invest not more than 55% of the value of  its
total  assets in  the securities of  a single issuer,  not more than  70% of the
value of its total assets  in the securities of any  two issuers, not more  than
80% of the value of its total assets in the securities of any three issuers, and
not more than 90% of the value of its total assets in the securities of any four
issuers. Under the Code and the Regulations, for purposes of the diversification
tests,  the securities of each agency  or instrumentality of the U.S. government
are considered  the securities  of a  separate issuer.  Each Series  intends  to
satisfy  either  the  diversification  test described  above  or  an alternative
diversification test  provided  by the  Code,  so that  the  variable  contracts
invested in each Series will be treated as variable contracts under the Code and
the income earned with respect to the contracts will not be currently taxable to
the Contract owners.
    
 
If  a  Series  invests in  zero  coupon  obligations upon  their  issuance, such
obligations will  have original  issue discount  in the  hands of  such  Series.
Generally,  original issue  discount equals  the difference  between the "stated
redemption price at maturity" of the  obligation and its "issue price" as  those
terms  are defined  in the  Code. If  a Series  acquires an  already issued zero
coupon bond from another holder, the  bond will have original issue discount  in
the Series' hands, equal to the difference between the "adjusted issue price" of
the  bond at the time the Series acquires  it (that is, the original issue price
of the bond plus the amount of original issue discount accrued to date) and  its
stated  redemption price  at maturity.  In each  case, a  Series is  required to
accrue as ordinary  interest income a  portion of such  original issue  discount
even  though such Series receives no cash  currently as interest payments on the
obligation. Similarly, in  the case of  PIKs, Series are  required to  recognize
interest  income  in the  amount  of the  fair  market value  of  the securities
received as interest payments on the PIKs, even though they receive no cash.
 
Because each  Series is  required to  distribute substantially  all of  its  net
investment income (including accrued original issue discount and interest income
attributable  to PIKs) in order to be taxed as a regulated investment company, a
Series having such income may be  required to distribute an amount greater  than
the  total cash  income the Series  actually receives. Accordingly,  in order to
make the  required  distribution,  the  Series may  be  required  to  borrow  or
liquidate securities. The extent to which the Series may liquidate securities at
a  gain may be  limited by the requirement  that generally less  than 30% of its
gross income (on an annual basis) consists of gains from the sale of  securities
held for less than three months.
 
   
For  Federal  income tax  purposes  the Series  had  the following  capital loss
carryovers at December  31, 1997,  which, if  not offset  by subsequent  capital
gains,  will expire in 1997 through 2005.  It is unlikely the Board of Directors
will authorize a  distribution of  any net  realized gains  until the  available
capital loss carryovers have been offset or expired.
    
 
   
<TABLE>
<S>                                       <C>
Money Market Series.....................            $
U.S. Government Securities Series.......
Diversified Income Series...............
High Yield Series.......................
Growth & Income Series..................
Global Growth Series....................
Growth Stock Series.....................
Aggressive Growth Series................
</TABLE>
    
 
   
UNDERWRITER
    
 
   
Investors   has  entered  into  an  Underwriting  Agreement  for  the  sale  and
distribution  of  the  Series'  shares.  This  Underwriting  Agreement  may   be
terminated  by Fortis Series or Investors at any  time by the giving of 60 days'
written notice, and  terminates automatically  in the event  of its  assignment.
Unless  sooner terminated, the  Underwriting Agreement shall  continue in effect
for more than two years after its execution only so long as such continuance  is
also  approved by the vote of a majority of the directors who are not parties to
such Underwriting  Agreement, or  interested persons  of such  parties, cast  in
person at a meeting called for the purpose of voting on such approval.
    
 
   
The Underwriting Agreement requires Investors to pay all promotional expenses in
connection  with  the  distribution  of  the  Fortis  Series'  shares, including
printing and distributing  prospectuses and  shareholder reports  to new  Policy
owners  and the costs  of sales literature. Pursuant  to a separate distribution
agreement between  Fortis Benefits  and  Investors, Fortis  Benefits  reimburses
Investors  for these expenses or  pays them on Investors'  behalf, to the extent
they involve shares issued  to fund variable life  insurance policies issued  by
Fortis Benefits.
    
 
In  the Underwriting Agreement, Investors  undertakes to indemnify Fortis Series
against all costs  of litigation and  other legal proceedings,  and against  any
liability incurred by or imposed upon Fortis Series in any way arising out of or
in connection with the sale or distribution of the Fortis Series' shares, except
to  the  extent that  such  liability is  the  result of  information  which was
obtainable by Investors only from persons affiliated with Fortis Series but  not
with Investors.
 
                                       57
<PAGE>
PERFORMANCE
 
Cumulative total return is computed by finding the cumulative compounded rate of
return  over the  period indicated  in the  advertisement that  would equate the
initial amount  invested  to  the  ending redeemable  value,  according  to  the
following formula:
 
<TABLE>
<S>         <C>         <C>    <C>          <C>     <C>
                                ERV-P
 CTR           =         (       ----        )       100
                                  P
</TABLE>
 
<TABLE>
<S>      <C>   <C>
Where:   CTR   =   Cumulative total return;
         ERV   =   ending  redeemable value at the  end of the period
                   of a  hypothetical  $1,000  payment  made  at  the
                   beginning of such period; and
         P     =   initial payment of $1,000
</TABLE>
 
This  calculation  assumes all  dividends  and capital  gains  distributions are
reinvested at net asset value on the appropriate reinvestment dates as described
in the Prospectus and includes all  recurring fees, such as investment  advisory
and management fees, charged to all shareholder accounts.
 
Average  annual total return figures are  computed by finding the average annual
compounded rates of return over the periods indicated in the advertisement  that
would  equate  the  initial  amount invested  to  the  ending  redeemable value,
according to the following formula:
 
<TABLE>
     <S>         <C>
           n
     P(1+T)      =     ERV
</TABLE>
 
<TABLE>
<S>      <C>   <C>
Where:   P     =   a hypothetical initial payment of $1,000
         T     =   average annual total return;
         n     =   number of years; and
         ERV   =   ending redeemable value at  the end of the  period
                   of  a  hypothetical  $1,000  payment  made  at the
                   beginning of such period.
</TABLE>
 
This calculation  assumes  all dividends  and  capital gains  distributions  are
reinvested at net asset value on the appropriate reinvestment dates as described
in  the Prospectus, and includes all recurring fees, such as investment advisory
and management fees, charged to all shareholder accounts.
 
Yield is computed by  dividing the net investment  income per share (as  defined
under  Securities and Exchange  Commission rules and  regulations) earned during
the computation period by the maximum offering  price per share on the last  day
of the period, according to the following formula:
 
<TABLE>
<S>        <C>  <C>  <C>    <C>  <C>  <C>                             <C>
                     (a-b)
YIELD = 2        [    ---   +1    ]         to the power of 6            -1
                      cd
</TABLE>
 
   
<TABLE>
<S>     <C>   <C>
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; and
        d  =  the maximum offering price  per share on the  last
              day of the period.
</TABLE>
    
 
Current  yield (calculated over a seven-day  period) is a percentage computed by
determining the net  change, exclusive  of capital changes,  in the  value of  a
hypothetical  preexisting account having a balance of one share at the beginning
of the  period, subtracting  a hypothetical  charge reflecting  deductions  from
shareholder accounts, and dividing the difference by the value of the account at
the  beginning of  the base period  to obtain  the base period  return, and then
multiplying the base period return by (365/7) with the resulting figure  carried
to  at least the  nearest hundredth of one  percent. Effective yield (calculated
over a seven-day period) is computed by determining the net change, exclusive of
capital changes, in  the value of  a hypothetical preexisting  account having  a
balance  of one share at the beginning of the period, subtracting a hypothetical
charge  reflecting  deductions  from  shareholder  accounts,  and  dividing  the
difference  by the value of  the account at the beginning  of the base period to
obtain the base period  return, and then compounding  the base period return  by
adding  1, raising the sum to a power equal to 365 divided by 7, and subtracting
1 from the result, according to the following formula:
 
<TABLE>
<S>                 <C>                       <C>  <C>    <C>
Effective Yield =   [   (Base Period Return   +1)  365/7  ]   -1
</TABLE>
 
The Series also  may quote  annual yield  figures, calculated  similarly to  the
above methods.
 
   
Current  yield  information  is  useful in  reviewing  performance,  but because
current yield will fluctuate, (1) such  information may not provide a basis  for
comparison with bank deposits or other investments which pay a fixed yield for a
stated  period of  time and  may be  insured and  (2) the  current yield  is not
necessarily representative of future  results. Mid Cap  Stock Series, Small  Cap
Value  Series and  Large Cap  Growth Series had  not commenced  operations as of
December 31, 1997, and no information for such series is provided.
    
 
                          AVERAGE ANNUAL TOTAL RETURNS
 
   
<TABLE>
<CAPTION>
                                                                10 YEARS/
                                                                  SINCE
SERIES                                     1 YEAR    5 YEARS    INCEPTION
- ----------------------------------------  --------   --------   ---------
<S>                                       <C>        <C>        <C>
U.S. Government Securities..............          %          %       %
Diversified Income......................          %          %       %(1)
Global Bond.............................          %    N/A           %(2)
High Yield..............................          %    N/A           %(3)
Asset Allocation........................          %          %       %
Global Asset Allocation.................          %    N/A           %(4)
Value...................................    N/A        N/A           %(5)
Growth & Income.........................          %    N/A           %(3)
S&P 500 Index...........................    N/A        N/A           %(5)
Blue Chip Stock.........................    N/A        N/A           %(5)
Global Growth...........................          %    N/A           %(6)
Growth Stock............................          %          %       %
International Stock.....................          %    N/A           %(4)
Aggressive Growth.......................          %    N/A           %(3)
</TABLE>
    
 
- --------------------------
   
 (1)Inception date: May 2, 1988.
    
 
   
 (2)Inception date: January 3, 1995.
    
 
   
 (3)Inception date: May 2, 1994.
    
 
   
 (4)Inception date: January 3, 1995.
    
 
   
 (5)Inception date: May 1, 1996.
    
 
   
 (6)Inception date: May 1, 1992.
    
 
                                       58
<PAGE>
                            CUMULATIVE TOTAL RETURNS
 
   
<TABLE>
<CAPTION>
                                           SINCE
SERIES                                    INCEPTION
- ----------------------------------------  --------
<S>                                       <C>
U.S. Government Securities..............          %(1)
Diversified Income......................          %(2)
Global Bond.............................          %(3)
High Yield..............................          %(4)
Asset Allocation........................          %
Global Asset Allocation.................          %(5)
Value...................................    11.49 %(6)
Growth & Income.........................          %(4)
S&P 500 Index...........................          %(6)
Blue Chip Stock.........................          %(6)
Global Growth...........................          %(7)
Growth Stock............................          %
International Stock Series..............          %(5)
Aggressive Growth.......................          %(4)
</TABLE>
    
 
- --------------------------
   
 (2)Inception date: May 2, 1988.
    
 
   
 (3)Inception date: January 3, 1995.
    
 
   
 (4)Inception date: May 2, 1994.
    
 
   
 (5)Inception date: January 3, 1995.
    
 
   
 (6)Inception date: May 1, 1996.
    
 
   
 (7)Inception date: May 1, 1992.
    
As noted in  the Prospectus, Fortis  Series may advertise  the Series'  relative
performance  as compiled by outside organizations or refer to publications which
have mentioned its performance.
 
Fortis Series may from time to time compare the Series with the following:
 
     (1) The Salomon Brothers  Non-U.S. Dollars Indices,  which are measures  of
the  total  return  performance  of  high-quality  non-U.S.  dollar  denominated
securities in major sectors of the worldwide bond markets.
 
     (2) The  Shearson  Lehman  Government/Corporate  Bond  Index,  which  is  a
comprehensive  measure of all public obligations of the U.S. Treasury (excluding
flower bonds and foreign targeted issues), a publicly issued debt of agencies of
the U.S.  Government (excluding  mortgage-backed  securities), and  all  public,
fixed  rate, nonconvertible  investment grade  domestic corporate  debt rated at
least Baa by Moody's or BBB  by S&P, or, in the  case of nonrated bonds. BBB  by
Fitch Investors Service (excluding Collateralized Mortgage Obligations).
 
     (3) Average of Savings Accounts, which is a measure of all kinds of savings
deposits,  including longer-term certificates (based  on figures supplied by the
U.S. League of Savings Institutions).  Savings accounts offer a guaranteed  rate
of  return on principal, but no opportunity for capital growth. During a portion
of the period, the  maximum rates paid  on some savings  deposits were fixed  by
law.
 
     (4)  The Consumer Price Index, which is  a measure of the average change in
prices over time in  a fixed market  basket of goods  and services (e.g.,  food,
clothing,  shelter,  fuels,  transportation  fares,  charges  for  doctors'  and
dentists' services, prescription  medicines, and other  goods and services  that
people buy for day-to-day living).
 
     (5)  Bear Stearns Foreign Bond Index, which provides simple average returns
for individual countries and GNP-weighted index, beginning in 1975. The  returns
are broken down by local market and currency.
 
     (6)  Ibbottson  Associates  International  Bond  Index,  which  provides  a
detailed breakdown of local market and currency returns since 1960.
 
     (7) Standard & Poor's "500" Index ("S&P 500") which is a widely  recognized
index composed of the capitalization-weighted average of the price of 500 of the
largest publicly traded stocks in the United States.
 
     (8)  Salomon Brothers Broad  Investment Grade Index which  is a widely used
index composed of U.S. domestic government, corporate and mortgage-backed  fixed
income securities.
 
     (9) Dow Jones Industrial Average.
 
    (10) Financial News Composite Index.
 
    (11)  Morgan Stanley  Capital International World  Indices, including, among
others, the Morgan  Stanley Capital  International Europe,  Australia, Far  East
Index  ("EAFE Index").  The EAFE Index  is an  unmanaged index of  more than 800
companies of Europe, Australia, and the Far East.
 
Indices prepared by the research departments of such financial organizations  as
Salomon  Brothers,  Inc.;  Merrill Lynch,  Pierce,  Fenner &  Smith,  Inc.; Bear
Stearns & Co., Inc.;  Morgan Stanley; and Ibbottson  Associates may be used,  as
well as information provided by the Federal Reserve Board.
 
Fortis Series may refer to the rating services listed below.
 
                              RATINGS SERVICE
 
   
          Lipper Analytical Services, Inc.
          CDA/Wiesenberger
          Morningstar Publications, Inc.
          Johnson's Charts
    
 
SYSTEMATIC WITHDRAWAL
 
CONVENIENT INCOME
 
If  you are over 59 1/2 years old,  your Fortis variable annuity can be a source
of income. For qualified plans or IRAs, you can use a systematic withdrawal plan
to satisfy the minimum distribution requirement when you turn age 70 1/2.
 
YOU CAN HAVE MONTHLY INCOME
 
    - Directly deposited to  a Fortis  Money Fund account  for convenient  check
      writing.*
 
    - Electronically   deposited  directly  to  a  checking,  money  market*  or
      brokerage account.
 
    - Sent directly in the form of a check.
 
    - Conveniently forwarded  to another  address to  pay disability  insurance,
      life insurance, long-term care premiums, mortgage, etc.
 
CHOOSE YOUR STRATEGY:
 
- -EARNINGS ONLY--withdraw any profits, leave your principal intact.
 
    - Principal never touched to provide income.
 
    - Amount varies with the performance of the investments you choose.
 
- -SPECIFY EXACT DOLLAR AMOUNT:
 
    - Ideal for paying planned expenses or supplementing your income.
 
    - Any additional earnings continue to grow tax deferred.
 
                                       59
<PAGE>
HOW TO GET STARTED
 
Your  registered representative can  help you decide  what systematic withdrawal
plan is  right  for you.  Complete  the  Systematic Withdrawal  section  of  the
Variable Annuity Service Request Form (#97212.)
 
                                     [LOGO]
 
- --------------------------
 
*  A money market fund is neither insured nor guaranteed by the U.S. Government.
While a stable net asset value is a goal of the fund, it is not a guarantee.
 
Withdrawals from an annuity are  subject to tax and may  be subject to an  early
withdrawal  charge. The IRS charges a 10%  tax penalty on most withdrawals prior
to owner age 59 1/2.
 
Subaccount unit values fluctuate.  When units are redeemed,  their value may  be
worth more or less than their original cost.
 
Opportunity  and Masters are  two separate annuities  with distinct features and
charges. This  material  must  be  preceded  or  accompanied  by  a  Masters  or
Opportunity annuity brochure.
 
For  more  complete information  about  Fortis annuities  including  charges and
expenses, send for a prospectus from Fortis Investors, Inc. P.O. Box 64284,  St.
Paul, MN 55164. Read it carefully before you invest.
 
   
This  investment is not FDIC insured, is not an obligation of, nor guaranteed by
any bank  or financial  institution, and  involves investment  risks,  including
possible loss of principal.
    
 
FINANCIAL STATEMENTS
 
   
The audited financial statements as of December 31, 1997, as set forth in Fortis
Series'   1997  Annual  Report  to  Shareholders,  are  incorporated  herein  by
reference. The  audited financial  statements are  provided in  reliance on  the
report  of KPMG  Peat Marwick LLP,  4200 Norwest Center,  Minneapolis, MN 55402,
independent auditors of Fortis Series, and  given on the authority of such  firm
as experts in accounting and auditing.
    
 
   
CUSTODIAN AND COUNSEL
    
 
   
U.S.  Bank National Association,  601 Second Avenue  South, Minneapolis MN 55480
acts as custodian of  Fortis Series' assets and  portfolio securities. Dorsey  &
Whitney  LLP, 220 South Sixth Street,  Minneapolis, MN 55402, is the independent
General Counsel for Fortis Series.
    
 
LIMITATION OF DIRECTOR LIABILITY
 
Under Minnesota  law, each  director  of Fortis  Series owes  certain  fiduciary
duties  to Fortis Series and to its  shareholders. Minnesota law provides that a
director "shall discharge the duties of the position of director in good  faith,
in  a manner the director reasonably believes to be in the best interests of the
corporation, and with the care an  ordinarily prudent person in a like  position
would exercise under similar circumstances." Fiduciary duties of a director of a
Minnesota  corporation include, therefore,  both a duty of  "loyalty" (to act in
good faith and act in a manner  reasonably believed to be in the best  interests
of  the corporation) and  a duty of "care"  (to act with  the care an ordinarily
prudent person in a like  position would exercise under similar  circumstances).
Minnesota  law  authorizes  corporations  to  eliminate  or  limit  the personal
liability of a  director to  the corporation  or its  shareholders for  monetary
damages  for breach  of the  fiduciary duty of  "care." Minnesota  law does not,
however, permit a corporation to eliminate or limit the liability of a  director
(i) for any breach of the director's duty of "loyalty" to the corporation or its
shareholders,  (ii) for  acts or  omissions not  in good  faith or  that involve
intentional misconduct or a  knowing violation of law,  (iii) for authorizing  a
dividend,  stock repurchase or redemption or  other distribution in violation of
Minnesota law or  for violation  of certain provisions  of Minnesota  securities
laws,  or (iv) for any  transaction from which the  director derived an improper
personal benefit.  The Articles  of  Incorporation of  Fortis Series  limit  the
liability  of directors to  the fullest extent  permitted by Minnesota statutes,
except to the extent that such a liability cannot be limited as provided in  the
1940  Act  (which  act  prohibits  any provisions  which  purport  to  limit the
liability of directors  arising from  such directors'  willful misfeasance,  bad
faith,  gross negligence,  or reckless disregard  of the duties  involved in the
conduct of their role as directors).
 
Minnesota law does not eliminate the duty of "care" imposed upon a director.  It
only  authorizes a corporation to eliminate monetary liability for violations of
that duty. Minnesota law, further, does not permit elimination or limitation  of
liability  of  "officers"  to the  corporation  for  breach of  their  duties as
officers (including the liability of directors who serve as officers for  breach
of  their  duties as  officers). Minnesota  law does  not permit  elimination or
limitation of  the  availability of  equitable  relief, such  as  injunctive  or
rescissionary  relief.  Further, Minnesota  law does  not permit  elimination or
limitation of a  director's liability under  the Securities Act  of 1933 or  the
Securities  Exchange Act of 1934, and it is uncertain whether and to what extent
the elimination  of monetary  liability  would extend  to violations  of  duties
imposed on directors by the 1940 Act and the rules and regulations adopted under
such Act.
 
ADDITIONAL INFORMATION
 
Fortis Series has filed with the Securities and Exchange Commission, Washington,
D.C.  20549,  a Registration  Statement  under the  Securities  Act of  1933, as
amended, with respect  to the common  stock offered hereby.  The Prospectus  and
this  Statement of Additional Information do  not contain all of the information
set forth in the Registration Statement,  certain parts of which are omitted  in
accordance  with  Rules  and  Regulations of  the  Commission.  The Registration
Statement may be  inspected at  the principal office  of the  Commission at  450
Fifth  Street, N.W., Washington,  D.C., and copies thereof  may be obtained from
the Commission at prescribed rates.
 
                                       60
<PAGE>
APPENDIX
 
DESCRIPTION OF FUTURES, OPTIONS AND FORWARD CONTRACTS
 
OPTIONS ON SECURITIES
 
An option on a security provides the purchaser, or "holder," with the right, but
not the obligation, to purchase, in the case of a "call" option, or sell, in the
case  of a "put" option, the security or securities underlying the option, for a
fixed exercise price up to a stated  expiration date or, in the case of  certain
options,  on such date. The  holder pays a nonrefundable  purchase price for the
option, known as the "premium." The maximum amount of risk the purchaser of  the
option  assumes is equal to the premium plus related transaction costs, although
this entire amount may be lost. The risk of the seller, or "writer," however, is
potentially unlimited, unless the option is "covered." A call option written  by
the  Series is "covered" if  the Series 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  by  its custodian)  upon  conversion or  exchange  of other
securities held in its portfolio.  A call option is  also covered if the  Series
holds  a call on the same security and  in the same principal amount as the call
written where the exercise price of the call  held (a) is equal to or less  than
the exercise price of the call written or (b) is greater than the exercise price
of  the call written if  the difference is maintained by  the Series in cash and
high grade government securities in a  segregated account with its custodian.  A
put  option written by the Series is  "covered" if the Series maintains cash and
high grade government securities with a value  equal to the exercise price in  a
segregated  account with its custodian, or else holds a put on the same security
and in the same principal amount 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 writer's obligation is not so covered,  it is subject to the risk of  the
full  change in  value of the  underlying security  from the time  the option is
written until exercise.
 
Upon exercise of the option, the holder is required to pay the purchase price of
the underlying  security, in  the  case of  a call  option,  or to  deliver  the
security  in  return  for  the purchase  price  in  the case  of  a  put option.
Conversely, the writer is  required to deliver  the security, in  the case of  a
call  option, or to purchase the security, in  the case of a put option. Options
on securities which have been  purchased or written may  be closed out prior  to
exercise  or  expiration  by  entering into  an  offsetting  transaction  on the
exchange  on  which  the  initial  position  was  established,  subject  to  the
availability of a liquid secondary market.
 
Options on securities and options on indexes of securities, discussed below, are
traded  on  national securities  exchanges, such  as  the Chicago  Board Options
Exchange and the New York  Stock Exchange, which are  regulated by the SEC.  The
Options  Clearing Corporation  guarantees the  performance of  each party  to an
exchange-traded option,  by in  effect taking  the opposite  side of  each  such
option. A holder or writer may engage in transactions in exchange-traded options
on  securities and  options on indexes  of securities only  through a registered
broker-dealer which is a member of the exchange on which the option is traded.
 
In addition, options on securities and  options on indexes of securities may  be
traded  on  exchanges located  outside  the United  States  and over-the-counter
through financial institutions dealing in such options as well as the underlying
instruments. The  particular  risks of  transactions  on foreign  exchanges  and
over-the-counter  transactions  are set  forth more  fully  in the  Statement of
Additional Information.
 
OPTIONS ON STOCK INDEXES
 
In contrast to an option on a security, an option on a stock index provides  the
holder  with the right to make or receive a cash settlement upon exercise of the
option, rather than the right to purchase or sell a security. The amount of this
settlement is equal to (a) the amount, if any, by which the fixed exercise price
of the option exceeds (in the case of a call) or is below (in the case of a put)
the closing value of the underlying index on the date of exercise, multiplied by
(b) a fixed "index multiplier." The  purchaser of the option receives this  cash
settlement amount if the closing level of the stock index on the day of exercise
is  greater than, in the case of a call, or less than, in the case of a put, the
exercise price of the option. The writer  of the option is obligated, in  return
for  the premium  received, to  make delivery  of this  amount if  the option is
exercised. As in the  case of options  on securities, the  writer or holder  may
liquidate  positions in stock  index options prior to  exercise or expiration by
entering into closing transactions on the exchange on which such positions  were
established, subject to the availability of a liquid secondary market.
 
The  Series will cover all  options on stock indexes  by owning securities whose
price changes, in the opinion of Advisers (or a sub-adviser, if applicable), are
expected to be similar to those of the index, or in such other manner as may  be
in  accordance with the rules of the exchange  on which the option is traded and
applicable laws and regulations.  Nevertheless, where the  Series covers a  call
option on a stock index through ownership of securities, such securities may not
match  the composition of the index. In that event, the Series will not be fully
covered and could be subject to risk of loss in the event of adverse changes  in
the  value of the index. The Series will  secure put options on stock indexes by
segregating assets equal to the option's exercise price, or in such other manner
as may be in accordance  with the rules of the  exchange on which the option  is
traded and applicable laws and regulations.
 
The  index underlying a stock option index may be a "broad-based" index, such as
the Standard & Poor's 500 Index or the New York Stock Exchange Composite  Index,
the  changes in value  of which ordinarily  will reflect movements  in the stock
market in  general. In  contrast, certain  options may  be based  upon  narrower
market  indexes,  such as  the Standard  & Poor's  100 Index,  or on  indexes of
securities of  particular industry  groups, such  as  those of  oil and  gas  or
technology  companies.  A  stock index  assigns  relative values  to  the stocks
included in the index and the index fluctuates with changes in the market values
of the stocks so included.
 
FUTURES  CONTRACTS  ON  FIXED  INCOME  SECURITIES,  STOCK  INDEXES  AND  FOREIGN
CURRENCIES
 
A  Futures Contract is a bilateral agreement providing for the purchase and sale
of a specified type and amount of a financial instrument or foreign currency, or
for the making  and acceptance of  a cash settlement,  at a stated  time in  the
future  for  a fixed  price. By  its terms,  a Futures  Contract provides  for a
specified settlement date on which, in the case of the majority of interest rate
and foreign currency futures contracts, the fixed income securities or  currency
underlying  the  contract  are delivered  by  the  seller and  paid  for  by the
purchaser, or on which, in the case of stock index futures contracts and certain
interest rate and foreign currency futures contracts, the difference between the
price at which the contract was entered into and the contract's closing value is
settled between the purchaser and the  seller in cash. Futures Contracts  differ
from  options in that they are bilateral agreements, with both the purchaser and
the seller equally obligated to complete the transaction. Futures Contracts call
for settlement only  on the expiration  date, and cannot  be "exercised" at  any
other time during their term.
 
The  purchase or sale of a Futures Contract differs from the purchase or sale of
a security or the  purchase of an option  in that no purchase  price is paid  or
received.  Instead, an amount of cash or  cash equivalents, which varies but may
be as low as 5% or less of the value of the contract, must be deposited with the
broker as "initial margin." Subsequent payments to and from the broker, referred
to as "variation margin," are made on a daily basis as the value of the index or
instrument underlying the Futures Contract  fluctuates, making positions in  the
Futures  Contracts more  or less  valuable, a process  known as  "marking to the
market."
 
U.S. Futures Contracts may be purchased or sold only on an exchange, known as  a
"contract  market," designated by the CFTC for the trading of such contract, and
only through a registered futures commission merchant which is a member of  such
contract  market. A commission must be paid  on each completed purchase and sale
transaction. The contract  market clearing house  guarantees the performance  of
each  party to a Futures Contract, by in effect taking the opposite side of such
contract. At any time prior  to the expiration of  a Futures Contract, a  trader
may  elect  to close  out its  position by  taking an  opposite position  on the
contract market  on  which  the  position  was  entered  into,  subject  to  the
availability of a secondary market,
 
                                       61
<PAGE>
which  will operate  to terminate  the initial position.  At that  time, a final
determination of variation margin is made and any loss experienced by the trader
is required to be paid  to the contract market  clearing house while any  profit
due  to the trader must be delivered to it. Futures Contracts may also be traded
on foreign exchanges.
 
Interest rate  Futures Contracts  currently are  traded on  a variety  of  fixed
income  securities,  including long-term  U.S.  Treasury Bonds,  Treasury Notes,
Government National Mortgage  Association modified pass-through  mortgage-backed
securities  ,  and  U.S.  Treasury Bills.  In  addition,  interest  rate Futures
Contracts include contracts on indexes of municipal securities. Foreign currency
Futures Contracts currently are  traded on the  British pound, Canadian  dollar,
Japanese yen, Swiss franc, West German mark, and on Eurodollar deposits.
 
A  stock  index  or Eurodollar  Futures  Contract  provides for  the  making and
acceptance of a cash settlement in much the same manner as the settlement of  an
option  on a stock  index. The types  of indexes underlying  stock index futures
contracts are essentially the same as  those underlying stock index options,  as
described above. The index underlying a municipal bond index futures contract is
a broad-based index of municipal securities designed to reflect movements in the
municipal securities market as a whole. The index assigns weighted values to the
securities included in the index and its composition is changed periodically.
 
OPTIONS ON FUTURES CONTRACTS
 
An Option on a Futures Contract provides the holder with the right to enter into
a  "long" position  in the underlying  Futures Contract,  in the case  of a call
option, or a "short" position in the underlying Futures Contract, in the case of
a put option, at a  fixed exercise price up to  a stated expiration date or,  in
the  case of certain options,  on such date. Upon exercise  of the option by the
holder, the contract  market clearing  house establishes  a corresponding  short
position  for the  writer of  the option,  in the  case of  a call  option, or a
corresponding long position, in the case of  a put option. In the event that  an
option  is exercised, the  parties will be  subject to all  the risks associated
with the  trading of  Futures Contracts,  such as  payment of  variation  margin
deposits. In addition, the writer of an Option on a Futures Contract, unlike the
holder,  is subject to  initial and variation margin  requirements on the option
position.
 
A position in an Option on a Futures Contract may be terminated by the purchaser
or the  seller prior  to expiration  by  affecting a  closing purchase  or  sale
transaction,  subject to the availability of a liquid secondary market, which is
the purchase or sale of  an option of the same  series (i.e., the same  exercise
price  and  expiration date)  as the  option previously  purchased or  sold. The
difference between the premiums paid and received represents the trader's profit
or loss on the transaction.
 
Options on Futures  Contracts that  are written or  purchased by  the Series  on
United States exchanges are traded on the same contract market as the underlying
Futures  Contract and, like Futures Contracts,  are subject to regulation by the
CFTC and the performance guarantee of the exchange clearing house. In  addition,
Options on Futures Contracts may be traded on foreign exchanges.
 
An  option, whether  based on  a Futures Contract,  a stock  index, or security,
becomes worthless to the holder when it expires. Upon exercise of an option, the
exchange or contract market clearing house assigns exercise notices on a  random
basis  to those of its members which have written options of the same series and
with the same  expiration date.  A brokerage  firm receiving  such notices  then
assigns  them on  a random basis  to those  of its customers  which have written
options of  the same  series and  expiration  date. A  writer therefore  has  no
control over whether an option will be exercised against it, nor over the timing
of such exercise.
 
FOREIGN CURRENCY FORWARD EXCHANGE CONTRACTS
 
A  foreign  currency  forward  exchange contract  (a  "Forward  Contract")  is a
contractual obligation  to purchase  or  sell a  specific  quantity of  a  given
foreign  currency for a fixed exchange rate  at a future date. Forward Contracts
are individually  negotiated  and are  traded  through the  "interbank  currency
market,"  an informal network of banks and brokerage firms which operates around
the clock and throughout the world. Transactions in the interbank market may  be
executed  only  through financial  institutions acting  as market-makers  in the
interbank market, or through brokers exercising purchases and sales through such
institutions. Market-makers in the interbank market generally act as  principals
in  taking the opposite side of their customers' positions in Forward Contracts,
and ordinarily charge a mark-up commission which may be included in the cost  of
the  Forward Contract. In addition, market-makers may require their customers to
deposit collateral upon entering  into a Forward Contract,  as security for  the
customer's  obligation to make  or receive delivery of  currency, and to deposit
additional collateral  if  exchange  rates  move  adversely  to  the  customer's
position.  Such deposits may  function in a  manner similar to  the margining of
Futures Contracts, described above.
 
Prior to the stated maturity date of  a Forward Contract, it may be possible  to
liquidate  the transaction by entering into  an offsetting contract. In order to
do so, however, a customer  may be required to  maintain both contracts as  open
positions  until maturity and to make or  receive a settlement of the difference
owed to or from the market-maker or broker at that time.
 
OPTIONS ON FOREIGN CURRENCIES
 
Options on foreign currencies  are traded in a  manner substantially similar  to
options on securities. In particular, an option on foreign currency provides the
holder  with the right to purchase, in the case of a call option, or to sell, in
the case of a put option, a stated quantity of a particular currency for a fixed
price up to a stated expiration date or, in the case of certain options, on such
date. The writer of the option undertakes the obligation to deliver, in the case
of a call option, or to purchase, in  the case of a put option, the quantity  of
the  currency  called for  in the  option, upon  exercise of  the option  by the
holder.
 
As in the case  of other types of  options, the holder of  an option on  foreign
currency  is required to pay a one-time, nonrefundable premium, which represents
the cost of purchasing the option. The holder can lose the entire amount of this
premium, as well as  related transaction costs, but  not more than this  amount.
The writer of the option, in contract, generally is required to make initial and
variation margin payments, similar to margin deposits required in the trading of
Futures  Contracts and  the writing  of other  types of  options. The  writer is
therefore subject to  risk of  loss beyond  the amount  originally invested  and
above the value of the option at the time it is entered into.
 
Certain  options  on foreign  currencies,  like Currency  Contracts,  are traded
over-the-counter through financial institutions acting as market-makers in  such
options and the underlying currencies. Such transactions therefore involve risks
not  generally associated with exchange-traded  instruments, which are discussed
below. Options on foreign currencies may  also be traded on national  securities
exchanges regulated by the SEC and on exchanges located in foreign countries.
 
Over-the-counter  transactions  can  only  be  entered  into  with  a  financial
institution willing to  take the  opposite side,  as principal,  of the  Series'
position,  unless the  institution acts  as broker and  is able  to find another
counterparty willing to  enter into the  transaction with the  Series. Where  no
such  counterparty is available, it will not be possible to enter into a desired
transaction. There also  may be  no liquid secondary  market in  the trading  of
over-the-counter  contracts, and the Series could  be required to retain options
purchased or written until exercise, expiration or maturity. This in turn  could
limit  the Series'  ability to  profit from open  positions or  to reduce losses
experienced, and could result in greater losses.
 
Further, over-the-counter transactions are  not subject to  the guarantee of  an
exchange clearing house, and the Series will therefore be subject to the risk of
default  by,  or the  bankruptcy of,  the financial  institution serving  as its
counterparty. One or more  of such institutions also  may decide to  discontinue
their  role  as  market-makers in  a  particular currency  or  security, thereby
restricting the Series' ability to enter into desired hedging transactions.  The
Series  will enter into an over-the-counter  transaction only with parties whose
creditworthiness has been reviewed and found satisfactory by Advisers.
 
   
96724 (REV. 5/98)
    
 
                                       62
<PAGE>

                                     PART C

                            Fortis Series Fund, Inc.

                                OTHER INFORMATION

ITEM 24.  FINANCIAL STATEMENTS AND EXHIBITS

(a)  Financial statements are incorporated by reference to the Registrant's
     Annual Report previously filed with the Commission.

(b)  Exhibits:

     1.1    Amended and Restated Articles of Incorporation (1)
     1.2    Certificate of Designation of Series G Common Shares, Series H
            Common Shares and Series I Common Shares (1)
     1.3    Certificate of Designation of Series J Common Shares, Series K
            Common Shares and Series L Common Shares (1)
     1.4    Certificate of Designation of Series M Common Shares, Series N
            Common Shares and Series O Common Shares (2)
     1.5    Certificate of Designation of Series P Common Shares, Series Q
            Common Shares and Series R Common Shares *
     2.     Amended and Restated Bylaws (1)
     3.     Not applicable
     4.     Not applicable
     5.1    Form of Investment Advisory and Management Agreement between the
            Registrant and Fortis Advisers, Inc. (3)
     5.2    Form of Investment Advisory and Management Agreement between the
            Registrant and Fortis Advisers, Inc. for High Yield Series, Growth &
            Income Series and Aggressive Growth Series (4)
     5.3    Form of Investment Advisory and Management Agreement between the
            Registrant and Fortis Advisers, Inc. for International Stock Series,
            Global Bond Series and Global Asset Allocation Series (5)
     5.4    Form of Investment Sub-Advisory and Management Agreement between
            Fortis Advisers, Inc. and Lazard Freres Asset Management (5)
     5.5    Form of Investment Sub-Advisory and Management Agreement between
            Fortis Advisers, Inc. and Warburg Investment Management
            International Ltd. (5)
     5.6    Form of Investment Sub-Advisory and Management Agreement between
            Fortis Advisers, Inc. and Morgan Stanley Asset Management Limited
            (5)
     5.7    Form of Investment Sub-Advisory and Management Agreement between the
            Registrant and Fortis Advisers, Inc. for Value Series, S&P 500 Index
            Series and Blue Chip Stock Series (1)
     5.8    Investment Sub-Advisory and Management Agreement between Fortis
            Advisers, Inc. and The Dreyfus Corporation (2)

<PAGE>


     5.9    Investment Sub-Advisory and Management Agreement between Fortis
            Advisers, Inc. and T. Rowe Price Associates, Inc. (2)
     5.10   Investment Sub-Advisory and Management Agreement between Fortis
            Advisers, Inc. and The Dreyfus Corporation for Mid Cap Stock
            Series *
     5.11   Investment Sub-Advisory and Management Agreement between Fortis
            Advisers, Inc. and Berger Associates, Inc. for Small Cap Value
            Series *
     5.12   Investment Sub-Advisory and Management Agreement between Fortis
            Advisers, Inc. and Alliance Capital Management L.P. for Large Cap
            Growth Series *
     6.1    Form of Underwriting and Distribution Agreement (1)
     6.2    Dealer Sales Agreement (3)
     7.     Not applicable
     8.1    Custody Agreement (2)
     8.2    Custody Agreement for Global Growth Series, International Stock
            Series, Global Bond Series, Global Assets Allocation Series and Blue
            Chip Stock Series (2)
     9.     Not applicable
     10.1   Opinion and Consent of Dorsey & Whitney LLP (3)
     10.2   Opinion and Consent of Dorsey & Whitney LLP (4)
     10.3   Opinion and Consent of Dorsey & Whitney LLP for Series J, Series K
            and Series L Common Shares (5)
     10.4   Opinion and Consent of Dorsey & Whitney LLP for Series M, Series N
            and Series O Common Shares (2)
     11.    Consent of KPMG Peat Marwick LLP *
     12.    Not applicable
     13.    Not applicable
     14.    Not applicable
     15.    Not applicable
     16.    Performance Quotation Computation Schedule (6)
     18.    Not applicable

- -------------------------
(1)  Incorporated by reference to Post-Effective Amendment No. 18 to the
     Registrant's Registration Statement on Form N-1A filed with the Commission
     in February 1996.
(2)  Incorporated by reference to Post-Effective Amendment No. 19 to the
     Registrant's Registration Statement on Form N-1A filed with the Commission
     in April 1996.
(3)  Incorporated by reference to Post-Effective Amendment No. 11 to the
     Registrant's Registration Statement on Form N-1A filed with the Commission
     in October 1992.
(4)  Incorporated by reference to Post-Effective Amendment No. 13 to the
     Registrant's Registration Statement on Form N-1A filed with the Commission
     in February 1994.
(5)  Incorporated by reference to Post-Effective Amendment No. 14 to the
     Registrant's Registration Statement on Form N-1A filed with the Commission
     in October 1994.

<PAGE>

(6)  Incorporated by reference to Post-Effective Amendment No. 7 to the
     Registrant's Registration Statement on Form N-1A filed with the Commission
     in March 1990.
*    To be filed by amendment.

ITEM 25. PERSONS CONTROLLED BY OR UNDER COMMON CONTROL WITH REGISTRANT

     No person is directly or indirectly controlled by or under common control
with the Registrant.

ITEM 26.  NUMBER OF HOLDERS OF SECURITIES

     As of May 1, 1998, there were the following number of record holders of
Common Shares of each Series then outstanding:

<TABLE>
     <S>                                                   <C>
     Series A  Growth Stock Series                         _____
     Series B  U.S. Government Securities Series           _____
     Series C  Money Market Series                         _____
     Series D  Managed Series                              _____
     Series E  Income Series                               _____
     Series F  Global Growth Series                        _____
     Series G  High Yield Series                           _____
     Series H  Growth & Income Series                      _____
     Series I  Aggressive Growth Series                    _____
     Series J  International Stock Series                  _____
     Series K  Global Bond Series                          _____
     Series L  Global Asset Allocation Series              _____
     Series M  Value Series                                _____
     Series N  S&P 500 Index Series                        _____
     Series O  Blue Chip Stock Series                      _____
</TABLE>

ITEM 27.  INDEMNIFICATION

     Refer to Post-Effective Amendment No. 5 to the Registrant's Registration
Statement filed with the Commission in February 1988, which is incorporated
herein by reference.

ITEM 28.  BUSINESS AND OTHER CONNECTIONS OF INVESTMENT ADVISER

     Information on the business of the Adviser is described in the Statement of
Additional Information.  In addition to those listed in the Statement of
Additional Information:

<TABLE>
<CAPTION>
                                                       Other Business/Employment
Name                     Position with Adviser         During Past Two Years
- ----                     ---------------------         ----------------------
<S>                      <C>                           <C>
Michael D. O'Connor      Qualified Plan Officer        Qualified Plan Officer of Fortis
                                                       Benefits Insurance Company

<PAGE>

David C. Greenzang       Money Market Portfolio        Debt securities manager with
                                                         OfficerFortis, Inc.
</TABLE>

ITEM 29.  PRINCIPAL UNDERWRITERS

(a)  Fortis Advantage Portfolios, Inc.
     Fortis Equity Portfolios, Inc.
     Fortis Fiduciary Fund, Inc.
     Fortis Income Portfolios, Inc.
     Fortis Money Portfolios, Inc.
     Fortis Securities, Inc.
     Fortis Series Fund, Inc.
     Fortis Worldwide Portfolios, Inc.
     Variable Account C of Fortis Benefits Insurance Company
     Variable Account D of Fortis Benefits Insurance Company

(b)  In addition to those listed in the Statement of Additional Information:

<TABLE>
<CAPTION>
                         Positions and Offices         Positions and Offices
    Name/Address            with Underwriter               with Registrant
- ---------------------    ---------------------         ---------------------
<S>                      <C>                           <C>
Carol M. Houghtby        2nd Vice President and        Accounting Officer
500 Bielenberg Drive     Treasurer
Woodbury, MN
</TABLE>

(c)  Not applicable.

ITEM 30.  LOCATION OF ACCOUNTS AND RECORDS

     The physical possession of the accounts, books, and other documents
required to be maintained by Section 31(a) of the Investment Company Act of
1940 and Rules 3la-1 to 3la-3 promulgated thereunder is maintained by the
Registrant at Fortis Advisers, Inc., 500 Bielenberg Drive, Woodbury, MN
55125.

ITEM 31.  MANAGEMENT SERVICES

     Not applicable.

ITEM 32.  UNDERTAKINGS

(a)  Not applicable.

(b)  Registrant, on behalf of Mid Cap Stock Series, Small Cap Value Series
and Large Cap Growth Series, undertakes to file a post-effective amendment,
using financial statements which need not be certified, within four to six
months from the date the Series commence business.

<PAGE>

(c)  Each recipient of a prospectus of any series of the Registrant may
request the latest Annual Report of such series, and such Annual Report will
be furnished by the Registrant without charge.

<PAGE>

                                    SIGNATURES

          Pursuant to the requirements of the Securities Act of 1933 and the
Investment Company Act of 1940, the Registrant has duly caused this Registration
Statement on Form N-1A to be signed on its behalf by the undersigned, thereunto
duly authorized, in the City of Woodbury and State of Minnesota on the 13th day
of February 1998.

                                   FORTIS SERIES FUND, INC.
                                    (Registrant)


                                   By    /s/ Dean C. Kopperud
                                      ----------------------------------------
                                         Dean C. Kopperud, President

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

  /s/ Dean C. Kopperud             President (principal      February 13, 1998
- ------------------------------     executive officer)
Dean C. Kopperud

  /s/ Tamara L. Fagely             Treasurer (principal      February 13, 1998
- ------------------------------     financial and
Tamara L. Fagely                   accounting officer)

Richard W. Cutting*                Director

Allen R. Freedman*                 Director

Robert M. Gavin*                   Director

Benjamin S. Jaffray*               Director

Jean L. King*                      Director

Edward M. Mahoney*                 Director

Robb L. Prince*                    Director

Leonard J. Santow*                 Director

Noel S. Shadko                     Director

Joseph M. Wikler*                  Director


*By   /s/ Dean C. Kopperud                                   February 13, 1998
    ------------------------------------
     Dean C. Kopperud, Attorney-in-Fact
     (Pursuant to a Power of Attorney dated March 21, 1996)



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